Volumn Content

Steelmaking 2010 Vol.26 Please wait a minute... For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Selecting secondary refining technology properly and pushing forward construction of high efficient and low cost“clean steel platform” Steelmaking    2010, 26 (01): 1-6.   Abstract （679）            Knowledge map    Save The iron and steel industry at home and abroad is now facing a very serious challenge of the worldwide financial crisis today. One of the key points for readjustment and rejuvenation of the iron and steel industry of China is to adjust and optimize the products and processes by means of scientific and technological progress and in the meanwhile acceleratedly pushing forward the construction of the high efficient and low cost “clean steel platform” has become one of the current scientific and technological innovative tasks of the iron and steel works. The development of secondary refining technology in China has already gone through three important phases, namely initial step, popularization and optimization and uptodate with a very clearcut guiding principle it has grown up to a certain level and scale and has accumulated experience and taken hold of quite a number of key technologies. However certain problems such as low refining ratio,incompetency of properly selection and application of the refining functions still need to be further improved.The high efficent and optimal technological processes of the secondary refining for such a few typical steel grades as the long products, hot rolled coils, medium plate and cold rolled sheets have to be studied and summarized in order to provide some referential experience for enterprises of the various kind. Deepening our understanding of the functions of different types of the secondary refining and properly selecting them will be propitous to the standardization of the basic secondary refining processes for different types of products as well as be beneficial to expedite the construction of the high efficient and low cost “clean steel platform”. Related Articles | Metrics Select Research and application of dephosphorization in 250 t combined blowing converters Steelmaking    2010, 26 (01): 7-12,5.   Abstract （630）            Knowledge map    Save Based on the production practice in No.3 Branch of General Steel-making Plant of WISCO, this paper discusses the factors affecting dephosphorization, such as liquid bath heat balance control, slag basicity, slag quantity and slag oxidability etc. Furthermore, proceeding from the dynamic model parameters adjustment, optimization of the static mode calculatioon, control of [%C] [%O] and development of the slag splashing model and etc. this paper also researches on how to ensure the effect of the combined blow and reduce phosphorus content at the end point of steelmaking by automatic steelmaking on condition that the combined blowing effect can be ensured without increase of the oxygen content in liquid steel at the end point of steelmaking. By application of the above-mentioned technological measures in No.3 Plant of General Steel-making Plant of WISCO good results have been achieved. Related Articles | Metrics Cited: Baidu(3) Select Steelmaking practice on of ML35 cold-heading steel Steelmaking    2010, 26 (01): 13-15,2.   Abstract （1636）            Knowledge map    Save In light of the problems existing in the initial stage of refining the cold heading steel ML35 in the Kunming Iron and Steel Co., Ltd, WISCO (hereafter referred to as Kungang) such as low ratio of equiaxed .zone , apparent central cavity and central segregation , fluctuation in control of the AlS amount in steel and frequent nozzle blockings in tundish, the causes to the defects are analyzed and to solve those problems a series of technological measures accordingly adopted including optimization of the technical parameters of electromagnetic stirring in the mould, increase of the ratio of the central equiaxed zone of the slab, solution of the defects of the slab such as the central cavity and central segregation, stabilization of AlS in steel by 3 step control process, solution of the difficult problem of the frequent nozzle blockage in the tundish by proper selection of the Ca treatment and adoption of CC protective casting. As the results the consecutive casting heats for the tundish are increased and production of cold heading steel ML35 stabilized as well. Related Articles | Metrics Cited: Baidu(2) Select Study and industrial application of compound basic slag for tundish Steelmaking    2010, 26 (01): 16-20.   Abstract （684）            Knowledge map    Save In order to improve the steel cleanliness and reduce the accidents of nozzle clogging resulting from Al2O3 inclusion, research and development of the basic slag for the tundish has been carried out according to the theoretical knowledge of the metallurgical slag in connection with practical conditions of the continuous casting in the Steel-making Plant of Chongqing Steel. As the results a few difficult problems about the basic slag for the tundish encountered in the continuous casting are solved and the production is carrying on very smoothly and in the meanwhile very satisfactory metallurgical results are achieved as well. Related Articles | Metrics Select Effect of deoxidation technology on control of oxide inclusions in the wheel steel Steelmaking    2010, 26 (01): 21-24.   Abstract （629）            Knowledge map    Save Effects of various deoxidation processes on the control of oxide inclusions in the wheel steel have been verified in terms of selection of the deoxidizing materials, time and mode of material charging as well as methods for removal of the deoxidation products. Results show that inclusions class B in steel can be very effectively reduced and the technological requirements of the wheel steel for inclusions class B in steel be fully satisfied by adoption of the processing route of pre-deoxidation prior to tapping—LF—Al addition one single time—Ca treatment. Related Articles | Metrics Cited: Baidu(1) Select Re-utilization of LF hot refining slag in converter steel-making plant Steelmaking    2010, 26 (01): 25-27.   Abstract （1580）            Knowledge map    Save The present article introduces the experiments on the re-utilization of LF hot refining slag in the Converter Steel-making Plant of Hangzhou Iron and Steel Group Co.. The result shows that the technology can ensure desulfurization purpose in refining motlen steel, and the Als content in the motlen steel is quite large. The hot metal yield by the new technology is 1.178t/heat higher than that by the original technology. The production cost reduces by 22.4028yuan per ton steel. At the same time extensive application of the technology show that the technology is capable of guaranting the quality of molten steel and reducing the cost in the actual production. Related Articles | Metrics Cited: Baidu(3) Select Research and control of mountain cracks on medium plate Steelmaking    2010, 26 (01): 28-31,7.   Abstract （684）            Knowledge map    Save The peak shaped cracks on the surfae of the medium plate is the primary cause to the substandard rate of the steel products. On the basis of systematic investigation and analysis it’s proved that the defect originates primarily from the transversal crack of the inner bow of the slab and the causes to the crack are closely related not only to the chemical compositions of the steel grade, but also to the conditions of the protective casting and performance of the equipments. The transversal cracks of the slab can be reduced effectively by optimization of the composition design, improvement in the effect of the protective casting and guarantee of the control accuracy of the key equipments of the continuous caster such as mould, vibration table and segments. Related Articles | Metrics Cited: Baidu(2) Select Analysis of nitrogen content in refining the bearing steel GCr15 byUHP-EAF→LF(VD) → CC process Steelmaking    2010, 26 (01): 32-35.   Abstract （741）            Knowledge map    Save The present paper analyzes the changes of the nitrogen content in GCr15 bearing steel and its influential factors in refining this steel grade in Nanjing Iron and Steel United Co Ltd by the processing route of UHP-EAF→LF(VD) →CC, namely a 100 t high impedance UHP-EAF, a 100t ladle refining furnace, billet continuous caster with the cross-section of 150 mm×150 mm. Production practice shows that in order to reduce the nitrogen content in the bearing steel over 55% not metal has to be charged into the EAF and foaming slag operation be adopted and as the results he average nitrogen content in steel comes up to 29×10-6 at arc furnace tapping period. By implementaion of large quantity slag and embedding arc operation and Argon stirring in the process of LF refining the increment of average nitrogen content is 21.8×10-6 and the decrease of nitrogen content in the process of VD vacuum Argon blowing is 15×10-6 and in whole process of gas-shielding casting the increment of average nitrogen content is 6.3×10-6. Since the increment of average nitrogen content during the LF refining is critical to the whole process the LF refining process should be optimized in the period. Related Articles | Metrics Select Technological research on refining high quality bloom of seamless tube with medium phosphor hot metal by“single type slag method” Steelmaking    2010, 26 (01): 36-39,5.   Abstract （1410）            Knowledge map    Save The present paper introduces the converter refining method, in which high quality steel grade can be produced by implementation of “the single type slag process” with medium phosphor hot metal under the conditions of absence of the advanced secondary refining equipments and absence of hot metal pretreatment of dephoshorization, namely “ High tapping carbon and deep dephosphorization method.” The study involves such a few technologies as the oxygen supply, blowing, slagging, end-point control and deoxidation alloying. Throughout more than two years of industrial application very satisfactory results have been achieved and enormous economic and social efficiencies obtained as well. Related Articles | Metrics Select Experimental study on increase of end-point manganese byaddition of manganese ore in converter Steelmaking    2010, 26 (01): 40-43.   Abstract （759）            Knowledge map    Save The present paper introduces the mechanism of manganese ore reduction and experimental study and even actual effects of increase in the end point manganese content in steel by adding manganese ore during converter steelmaking process. Factors influencing residual manganese at blow end point in steel are analyzed. Some techniques and measures for increasing rsidual manganese at blow end point in steel by adding manganese ore during converter steelmaking process are put forward. Related Articles | Metrics Cited: Baidu(7) Select Calculation of alloy addition of BOF steelmaking based onpredicting yield model Steelmaking    2010, 26 (01): 44-47.   Abstract （2364）            Knowledge map    Save In the process of BOF steelmaking in order to figure out the reasonable amount of alloy addition during deoxidizing and alloying of tapping, the predicting model for alloying yield of tapping is developed based on the knowledge of alloying yield, using support vector machine; and the alloy addition with the yield figured out by the model is calculated. In the study simulation is carried out with the practical prodution data. Results shows that the alloy addition calculating model of BOF based on predicting yield is up to the mustard of practical manufacturing. Related Articles | Metrics Select Research on effect of nozzle on secondary cooling results in Slab continuous casting process Steelmaking    2010, 26 (01): 48-52.   Abstract （738）            Knowledge map    Save The secondary cooling of slab continuous casting is one of the important factors affecting the quality of slab. In this paper, for the purpose of solving the problem of slab quality defects and improving slab quality in No.3 Steelmaking Plant of Handan Iron and Steel Group Co.Ltd, the nozzles of secondary cooling system are optimized. The proper types of nozzles are determined and main factors influencing the nozzle's performance analyzed. On the basis of the previous research, by means of optimization of nozzle type, pattern of nozzle arrangement and cooling water volume the central segregation of slabs has been improved and the equiaxed crystal ratio prominently raised. Related Articles | Metrics Select Study on parameters for slab dynamic soft reduction system Steelmaking    2010, 26 (01): 53-57.   Abstract （717）            Knowledge map    Save The Dynamic soft reduction system of stainless steel slab continuous casting machine in Taishan Steel including the segments, control system and calculation module are all domestic designed and manufactured and thus the aim of whole dynamic soft reduction system made in China is realized for the first time. Practice shows that the casting machine is featured of high stability, calculation of the module is accurate and the quality of the slab is excellent. In the process of soft reduction the deformation of the segments is effectively compensated. The critical control parameters for the dynamic soft reduction technology are optimized through a series of production experiments and the optimal parameters for soft reduction determined. Related Articles | Metrics Select Technological revamp on SN mechanism and related systems ofslide gate of 250t ladle Steelmaking    2010, 26 (01): 58-61.   Abstract （692）            Knowledge map    Save The prewent paper introduces the adaptability technology adopted in the revamp of the slide gate mechanism and related systems of the250t ladle in Baosteel and analyzes the economic efficiencies achieved in the revamp project on the basis of the numerous data. The experiments achieved in the revamp project can be used as an useful referrence for the revamp of the slide gate mechanism of the large ladle. Related Articles | Metrics Select Research on slab broadening and mould setting Steelmaking    2010, 26 (01): 62-65.   Abstract （1328）            Knowledge map    Save The relation between slab broadening and mould size setting is studied on the basis of the actual production in several continuous casting manufactures. By comparison of the results of investigation in the mould setting data of 5 coninuous casting plants with the design handbook of the continuous caster it’s found out that the broadening phenomenon of slab exists extensively in the continuous casting process in the five continuous casting plants; and the change of the slab width is the outcome of compensation of broadening of a slab with its shrinkage in the period from initial occurrence of shell to the formation of the solidified strand; and the apparent shrinkage ratio of a slab is the difference between the linear shrinkage and the ultimate broadening of the slab; and the ratio of ultimate broadening of slab for the five investigated plants ranges from 0.34% to 2.03% and the ratio of apparent shrinkage from 0.47% to 2.16%. Related Articles | Metrics Cited: Baidu(3) Select Practice on the revamp of secondary cooling zone ofheavy round bloom continuous caster Steelmaking    2010, 26 (01): 66-69.   Abstract （631）            Knowledge map    Save In light of the problems of low equiaxed crystal ratio and serious carbon segregation existing in the secondary cooling zone (full water cooling) of the heavy round bloom continuous caster in Ma’anshan Iron and Steel Co.,Ltd. In the process of developing high quality wheel steel technical revamp on the secondary zone of the continuous caster mainly involving adoption of spray cooling has been carried out and as the results temperature distribution on the surface of the slab is more homogeneuos, the texture of the slab turns to be denser, the equiaxed crystal ratio rises by 8% and the the carbon segregation index cuts down by 0.03. Related Articles | Metrics Cited: Baidu(4) Select Technology of foaming slag level control during latter period of blowing for BOF process Steelmaking    2010, 26 (01): 70-73.   Abstract （833）            Knowledge map    Save The technologies to control the level of foaming slag during the latter period of blowing for BOF process inome steelmaking works were introduced. The temperature difference method, microwave method and acoustical method are used for measuring the level of foaming slag during the blowing. By usage of the technologies not only the slopping frequency cab be reduced, but the nitrogen content in steel also decreased at the end point of blowing. Moreover, the feasibility of temperature difference method used for the converter of Shougang Qian’an Iron & Steel Co., Ltd is discussed. Related Articles | Metrics Cited: Baidu(5) Select Status quo of research on MgAl2O4 spinel inclusion in steel and trend of its development Steelmaking    2010, 26 (01): 74-78.   Abstract （833）            Knowledge map    Save The non-metallic spinel inclusion, MgAl2O4, is an undeformed inclusion in steel with high melting point .Therefore it is very harmful in the production of high grade steels. In the recent years research on the MgAl2O4 inclusion in steels has become a hot spot and received more and more attention in the sector of clean steel research. In the current paper the background of occurrence of MgAl2O4 inclusion in steels are introduced and researches on MgAl2O4 inclusion in steels reviewed and then further study on the kinetics of transformation of liquid melting compound inclusions from MgAl2O4 is proposed. Related Articles | Metrics Select Selecting secondary refining technology properly and pushing forward construction of high efficient and low cost“clean steel platform” Steelmaking    2010, 26 (2): 1-9.   Abstract （661）            Knowledge map    Save The iron and steel industry at home and abroad is now facing a very serious challenge of the worldwide financial crisis today. One of the key points for readjustment and rejuvenation of the iron and steel industry of China is to adjust and optimize the products and processes by means of scientific and technological progress and in the meanwhile acceleratedly pushing forward the construction of the high efficient and low cost “clean steel platform” has become one of the current scientific and technological innovative tasks of the iron and steel works. The development of secondary refining technology in China has already gone through three important phases, namely initial step, popularization and optimization and uptodate with a very clearcut guiding principle it has grown up to a certain level and scale and has accumulated experience and taken hold of quite a number of key technologies. However certain problems such as low refining ratio,incompetency of properly selection and application of the refining functions still need to be further improved.The high efficent and optimal technological processes of the secondary refining for such a few typical steel grades as the long products, hot rolled coils, medium plate and cold rolled sheets have to be studied and summarized in order to provide some referential experience for enterprises of the various kind. Deepening our understanding of the functions of different types of the secondary refining and properly selecting them will be propitous to the standardization of the basic secondary refining processes for different types of products as well as be beneficial to expedite the construction of the high efficient and low cost “clean steel platform”. Related Articles | Metrics Select Production practice of smelting weather-resistant steel by increasing the intensity of oxygen supply Steelmaking    2010, 26 (2): 10-12，5.   Abstract （1424）            Knowledge map    Save Proceeding from the refining technologies of the weather resistant steel the present paper analyzes the effects of the intensity of oxygen supply on the smelting cycle, end point phosphor content and oxygen consumption. Practical results show that by increasing 5% oxygen flow the smelting cycle per heat can be reduced by 1.53min and the change of the end point phosphor content is of insignificance and the oxygen consumption per heat reduced by 9394m3. Thus the production cost is lowered and productivity raised obviously. Related Articles | Metrics Cited: Baidu(4) Select Application and development of technologies of slag amount control from converter to ladle in Shougang Group Steelmaking    2010, 26 (2): 13-15.   Abstract （679）            Knowledge map    Save Technological for slag amount control from converter to ladle have been improved to some extent by revamp of the equipments and innovation of technologies in Hebei Shougang Qian’an Iron & Steel Co., Ltd. For those low carbon steel grades used in automobile sheets up to date the thickness of the slag layer in the ladle can be controlled within an average of 33.7mm and the slag amount to ladle from converter be controlled in a mean value of 4.8kg/t. Besides, a rise of T.Fe content in the end point converter slag and absence of usage of slag detective and measurement devices may cause an increase of slag amount to the ladle. Related Articles | Metrics Select RH process optimization in production of ULC steel by CSP process flow Steelmaking    2010, 26 (2): 16-17，4.   Abstract （710）            Knowledge map    Save The optimization of RH decarborization technology in production of extra-low carbon steel by the CSP process flow in Masteel has been expounded. By optimization of the RH-MFB oxygen blow process and control on the end point of BOF as well as an increase in the gas flow average end[C] of RH reaches 15ppm under the similar condition of RH treatment cycle. Thus Production of ULC steel in batch by CSP process flow can be ensured. Related Articles | Metrics Select Research on technology of improving fluidity of molten steel Steelmaking    2010, 26 (2): 18-21，6.   Abstract （1472）            Knowledge map    Save Causes to the deterioration of flowability of the hot metal such as factors affecting the flowability in the process of raising the Ca-treatment effect, lowering the hot metal oxidation, optimizing the chemical compositions of the refractory materials, changing the mode of Al addition and intensifying control in the refining process have been studied on the basis of analysis on the clogging materials in the SEN. By adoption of appropriate technological counter measures the flowability of the hot metal has been effectively improved and the SEN clogging rate reduced as well. Related Articles | Metrics Cited: Baidu(2) Select Study & practice of nitrogen control technology of IF steel for ahtomobile use Steelmaking    2010, 26 (2): 22-25，6.   Abstract （620）            Knowledge map    Save By means of studies on the denitrification in combined blown converter,nitrogen pick-up in tapping, denitrification in RH treatment and nitrogen pick-up in CC in connection with the practice of refining the IF steel for automobile sheet purpose in the No3 Branch of the General Steel-making Plant a complete set of nitrogen control measures for overall process have been formed. As the results the Nitrogen content of IF steel is controlled effectively in 17.64×10-6,the average value, 20×10-6 and the best 10×10-6.. Related Articles | Metrics Select Exergy analysis of converter steelmaking process Steelmaking    2010, 26 (2): 26-28.   Abstract （1525）            Knowledge map    Save The energy conversion process in the converter steel-making is analyzed by building up a energy analysis model for the purpose of study on the converter steel-making process. Results show that the exergy loss per ton is 439.54MJ, in which external loss takes up about 96.63% of total loss, and the exergy loss induced by converter deslagging is about 69.29% of total exergy loss. Pivot points for reduction of the energy loss in the process of converter steel-making are controlling the converter slag amount and reclaiming and reusing the residual heat of the converter slag. Related Articles | Metrics Cited: Baidu(4) Select Analysis on thermal stress for stainless steel AOD converter of 120 t Steelmaking    2010, 26 (2): 29-32.   Abstract （1542）            Knowledge map    Save Thermal stress simulation analysis is carried out on the newly designed 120t stainless steel AOD converter. Firstly pretreatment is made on the CAE model with the main stream CAE software HYPERMESH universally adopted over the world and then analysis conducted on the temperature field and thermal stress simulation of the converter system in operation using the finite element analysis software ANSYS and finally post treatment made on the results of the simulation analysis with the software HYPERMESH once more. In this way the characteristic data of thermal stress for the 120t stainless steel AOD converter in operation is obtained and the result of the specific analysis is beneficial to implementation of the design and production maintenance. Related Articles | Metrics Cited: Baidu(7) Select Study on cleanliness of SPHC steel produced by optimized refining process Steelmaking    2010, 26 (2): 33-36，5.   Abstract （637）            Knowledge map    Save Cleanliness of SPHC steel produced by optimized refining process has been investigated and the total oxygen and nitrogen contents and the law of variation of the micro inclusions as well as the large inclusions in the cast slab and billet after RH and LF refining systematically studied by sampling and analyzing comprehensively。The results show that in the SPHC slab produced by the processing route of hot metal pretreatment(desulphurization)—120t top and bottom combined blown converter—RH (Ca treatment)—continuous casting the total oxygen content and nitrogen content is 23×10-6 and 17×10-6 respectively and the chemical compositions of the slab are completely in conformity to the requirements and the amount of large inclusions in 10kg slab is 4.76mg, which is basically in agreement with the cleanliness of the slab produced with the original process and higher cleanliness of SPHC slab can be achieved by further optimizing the RH refining process. Related Articles | Metrics Cited: Baidu(6) Select Study on deep desulphurization technology in refining to pipeline steel Steelmaking    2010, 26 (2): 37-41.   Abstract （667）            Knowledge map    Save By the laboratory research on the deep desulphurizer for pipeline steel, an optimal ingredient scheme, namely lime blended with aluminize powder is established. Through analysis of different process routes the final pipeline steel production route is determined in this plant. The industrialization verification experiment on the usage of the deep desulphurizer is carried out in connection with the final production route and then the flowing point of the congruent melting slag system is detected after using the deep desulphurizer so as to guarantee the good fluidity of the slag system at the normal desulphurization temperature. The aim of desulfurization smaller than 0.0010% and the desulfurization rate larger than 80% is achieved preliminarily. Related Articles | Metrics Select process study on nitrogen pick-up in non-quenched and tempered crankshaft steel 48MnV-C Steelmaking    2010, 26 (2): 42-44，7.   Abstract （698）            Knowledge map    Save The non-quenched and tempered crankshaft steel 48MnV-C can be produced by adopting the process flow of “Converter→RH+LF→bloom continuous casting ”. The nitride manganese is added into the steel to increase the nitrogen content during LF refining. In this way the nitrogen content in the steel can be controlled consistently in the range of (108～134) ×10-6, the average value is 120 ×10-6, and the “white flake” in mill bar can be prevented. Related Articles | Metrics Select Water modeling and industrial trial experiment on argon bubbling curtain in tundish Steelmaking    2010, 26 (2): 45-48.   Abstract （750）            Knowledge map    Save The influence of argon blowing at tundish bottom on flow field in tundish and removal of large-sized inclusions in slab was studied by water modeling and industrial trial. Water modeling results show that flow field could be improved obviously, volume fraction of dead zone decreased and residence time increased by argon bubbling. The flow characteristics could be improved variously under different experimental parameters. Industrial trial results show that argon bubbling curtain in tundish is an effective means to remove large-sized inclusion, especially for the inclusion with diameter less than 140μm. The decrease ratio of total oxygen content from long nozzle zone to slab is increased by 37.74%. With argon blowing, large-sized inclusions content of slab decreased from 3.85 mg to 2.88 mg per 10kg sample. Related Articles | Metrics Cited: Baidu(1) Select Influence of additive on melting temperature and Al2O3 inclusion absorption for thin slab continuous casting mould flux Steelmaking    2010, 26 (2): 49-52.   Abstract （1448）            Knowledge map    Save The effects of addition of different additive on the melting temperature change after asorption of Al2O3 by the mold flux and on the absorptivity of the mold flux additive for the Al2O3 have been studied. Experimental results show that the melting temperature tends to decrease as the addition of Li2CO3 increases from 4% to 10% and in addition of man-made cryolite and borax the melting temperature tends to rise when addition of Al2O3 increases to 6% from 3% and at the juncture of 6% Al2O3 the melting temperature shows a downtrend obviously. The order of influence of different additives on the absorptivity of mold flux for the Al2O3 lines up as Li2CO3＞NaF＞Na2CO3＞man-made cryolite＞borate. The experimental results are of certain significance in guiding the design of the thin slab CC mold flux. Related Articles | Metrics Select Investigation in factors causing mold flux rim during slab continuous casting Steelmaking    2010, 26 (2): 53-56.   Abstract （1461）            Knowledge map    Save In light of the fact that mold flux rim usually appears during slab continuous casting of low alloy steel Q345D at Han-Steel the present paper studies the formation mechanism of flux rim, and confirms the factors causing the flux rim during casting by chemical analysis, laboratory scale melting and viscosity testing and scanning electron microscopy (SEM) et al. Results show that uneven melting and ill-fitted mixing of carbon materials are primary factors causing occurrence of the flux rim in the casting process and high crystallization temperature and deep molten flux layer tends to occurrence of the defect as well Related Articles | Metrics Cited: Baidu(3) Select Development and application of AOD equipments in refining stainless steel Steelmaking    2010, 26 (2): 57-60.   Abstract （671）            Knowledge map    Save Adoption of AOD equipments for refining stainless steel takes on a very important place in the stainless steel refining process. With the ever rising of the stainless steel output and technological level of refining in China it looks extremely important for the Country to develop the AOD equipments with self-determined intellectual property right. On the basis of accumulation of stainless steel smelting engineering technology for many years CERI has developed the equipments of AOD converter with independent intellectual property rights. This set of equipment is a truly home made equipment worthwhile popularizing broadly. Related Articles | Metrics Cited: Baidu(4) Select Revamp on sub-lance system of No.4 and 5 converters at No.2 Steel-makingPlant of Baosteel Steelmaking    2010, 26 (2): 61-63.   Abstract （1544）            Knowledge map    Save The present paper introduces the functions of sub-lance、its features and the disadvantages existing in operation in the No.2 Steel-making Plant of Baosteel and brings forwards the doable optimization projects. By means of equipment revamp and process optimization the problems existing in the original sub-lance systems are solved and the expected goal for the revamp achieved and the key technologies for the design and construction of the sub-lance system mastered, thus practical experience is accumulated for construction and revamp of the sub-lane system of the similar kind in the other Works. Related Articles | Metrics Select Process optimization for increasing the RH snorkel life Steelmaking    2010, 26 (2): 64-67.   Abstract （707）            Knowledge map    Save The present paper analyzes causes leading to low RH snorkel life in our steelmaking plant. By optimization of the ring brickwork, improvement in welding quality of the dip tube, perfection of hot gunning process and optimization of steel refining process the average service life of the RH snorkel has been dramatically increased ( from 41.3 heats to 91.6, the tiptop to 122 heats). Related Articles | Metrics Cited: Baidu(3) Select Increase in dust removal ability of converter gas cleaning systemin production practice Steelmaking    2010, 26 (2): 68-70.   Abstract （685）            Knowledge map    Save By increase in the new equipments, revamp on the existing onesand adjustment of the parameters in the No.2 Steel-making Plant of Anshan Iron & Steel Co., Ltd, emission of the dust from the stack is obviously reduced and energy consumption of blower lowered and gas and steam reclamation raised in great scale and therefore the dust removal capability of the primary dust removal system of converter as well as the environment protection level are raised. Related Articles | Metrics Select Experimental study of effect of steel slag on the activity of BF slag cement Steelmaking    2010, 26 (2): 71-74.   Abstract （659）            Knowledge map    Save In this paper, the effect of steel slag with different ratio on the activity of BF slag cement was researched. Study shows that for the steel slag blending with less than 20% composite powder its activity level index can meet the standard of S95 grade BF slag powder and the product quality will remain intact. If the quality fraction of the composite powder takes up 20 to 40% of the total cementations materials and 20% slag powder is blended with 80% BF slag powder the 7 day activity index will attain 75% and 28 day activity index 98%, and the results could be better than the use of the BF slag exclusively. Related Articles | Metrics Select Comparison and analysis of steel slag treatment method and comprehensive utilization Steelmaking    2010, 26 (2): 75-78.   Abstract （707）            Knowledge map    Save The present paper introduces and compares the main processing methods of the steel slag disposal in China. Results show that the steel slag comprehensive utilization and residual heat reclamation are still in the phase of research and development and haven’t been applied into industrial production broadly and therefore development of a new type steel slag disposal process for appropriate use of the resource is impending. Related Articles | Metrics Cited: Baidu(15) Select A few fundamental views concerning further saving energy and reduction of emission in converter steel-making plant Steelmaking    2010, 26 (3): 1-3.   Abstract （1527）            Knowledge map    Save one of the emphases for energy saving and emission reduction in an iron and steel enterprise is further saving energy in the converter steel-making plant. Optimization of the process flow is the first and foremost important focus point and compactness, high efficiency and automation are three main aspects that embody the process flow optimization. The pivot for the current research and popularization is to further raise the energy source conversion, reclamation and utilization efficiency of the steel-making plant. Temperature holding of the hot metal for the overall process, oveer heat running steadily in a relatively low level and establishment and optimization of an energy flow network as well as utilization of new pattern clean energy source are the orientation of develoment. Related Articles | Metrics Cited: Baidu(2) Select Application of N2 blowing on hot metal desulphurization of KR Steelmaking    2010, 26 (3): 4-7.   Abstract （1463）            Knowledge map    Save The present paper introduces the good results achieved such as an increase in the service life of stirrers, improvement in the deslagging, reduction of the iron loss in deslagging and enhancement in the quality rate of the end-point sulphur control in refining the the low sulphur steel (w(S)≤0.008%）by application of bottom nitrogen blow process for the hot metal pot(ladle) in the process of desulphurizing the hot metal by KR method with CaO as desulphurizer. Related Articles | Metrics page Page 1 of 3 Total 118 records First page Prev page Next page Last page