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Please wait a minute... For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Stability processing technology and application prospect of steel slag Steelmaking    2009, 25 (06): 73-78.   Abstract （613）            Knowledge map    Save Steel slag has an excellent physical and mechanical properties and some hard-water activity, fully meet the specification of engineering materials, but the size of its potential instability has seriously hampered the application of steel slag works. This paper summarizes the utilization of domestic and foreign steel slag research, analyzed the factors that caused the reasons for expansion of steel slag, to improve the stability of the process approach, and look forward to prospect the engineering application of steel slag. Related Articles | Metrics Cited: Baidu(40) Select Water Model and Numerical Simulation on Argon Blowing from Bottom of Ladle Steelmaking    2005, 21 (06): 33-36.   Abstract （2244）            Knowledge map    Save A water model for 130t ladle has been established and the mixing time of the molten steel in the ladle measured by conductivity method. The effects of different arrangement of permeable elements and different gas blowing rate on the mixing time of the molten steel in the process of ladle bottom argon blowing have been discussed. In the meanwhile the flow field inside the ladle is numerically simulated and the changes of the flow field in the ladle in different conditions are investigated and the optimal bottom argon blowing positions and argon bubbling patterns determined. Related Articles | Metrics Cited: Baidu(40) Select Improvement in Internal Quality of Rectangular Bloom by Optimization of Continuous Casting Process Steelmaking    2005, 21 (06): 16-17.   Abstract （2121）            Knowledge map    Save The effects of continuous casting process parameters of the rectangular bloom on the internal quality of the bloom are analyzed and countermeasure to improve the process put forward. By optimization of the continuous casting process the internal quality of the bloom bas been raised and better metallurgical results achieved. Related Articles | Metrics Cited: Baidu(25) Select Water model study on mixing time in a 210 t ladle in the CAS process JIN You-lin;BAO Yan-ping;YUE Feng;ZHANG Ting;CUI Heng Steelmaking    2007, 23 (06): 36-39.   Abstract （1743）            Knowledge map    Save In the present paper effects of the nozzle position variation, the flow rate of the bottom blow and the submerging depth of the submerged tube on the mixing status of the hot metal in the 210t ladle in the process of C.A.S refining have been studied and the law of influence of those parameters on the mixture of the hot metal found out by hydraulic model experiments in a specific Steel-making Plant in the Country. Taking into full considerations of the phenomena occurring in the water modeling and other factors the optimal technology parameters for the 21t ladle are obtained as below: the position of nozzle approximately (0.5~0.6)r, the flow rate of bottom blowing approximately 500～600 L/min and the submerging depth of submerged tube about 200mm. Related Articles | Metrics Cited: Baidu(23) Select Development of steelmaking and continuous casting technology and prospect of this technology in 2010 in China Steelmaking    2008, 24 (06): 1-12.   Abstract （1472）            Knowledge map    Save The present paper systematically has summerized the development of steelmaking-continuous casting technology and its principal technological achievements in China since 2000, analyzed its main problems currently existing and predicted the direction of the development of this technology in 2010 in our Country. In order to further raise the the productional and technological level of steelmaking-continuous casting technology in China it’s imperative to develop new concept and establish new target for the iron and steel works of the new generation of the 21st Cerntury and in the meanwhile build up a new platform for production of the hgih efficient and low cost clean steel by means of systematical optimization,dissection and integration of the over-all process of the steelmaking-continuous casting. The main problems of technology existing in building up the platform of production of the clean steel, solutions to those problems and specific measures are also involved in the disccusion of this paper. Related Articles | Metrics Cited: Baidu(21) Select Selection of hot metal pretreatment mode for new steel-making plant ZHANG Long-qiang;TIAN Nai-yuan;XU An-jun Steelmaking    2008, 24 (01): 58-62.   Abstract （1779）            Knowledge map    Save The optimal order of the hot metal pretreatment achieved by thermodynamic calculation and comparison of different flux and pretreatment methods is hot metal desulphurization-desiliconizaton and dephosphorization. The pretreatment containers determined by comparison of the thermodynamic conditions for different flux and different pretreatment methods are as follows: ladle for desulphurization by KR and converter for desiliconization and dephosphorization exclusively. It’s concluded by comparison analysis of the operation cost for hot metal pretreatment that special converter be selected to carry out dssiliconization and dephosphorization simultaneously and for the purpose of desulphurization KR method (CaO used as the desulphurizer) be adopted. The optimal hot metal pretreatment mode for the newly built steel-making plant is determined to be hot metal desulphurization in ladle by KR method (CaO as desulphurizer) and desiliconization and dephosphorization in converter. Related Articles | Metrics Cited: Baidu(18) Select Simulation study on optimization of flow control device for a single-strand tundish in slab continuous casting Steelmaking    2009, 25 (02): 48-51,7.   Abstract （594）            Knowledge map    Save The fluid flow in the tundish of stainless steel slab casting has been studied by water model experiment and numerical simulation. The results show that severe problem existed in the flow field of the original tundish; and short circuit phenomenon was obviously in existance and the ratio of the dead zone was relatively larger and thus the homogenization of the hot metal was not so acceptable; and by orthogonal optimization tests an optimal scheme of the dam and weir combination is drawn up and the flow field of the tundish is improved; and by application of the optimized plan in which the gas bubbling curtain is used in place of the original weir the flow field of the tundish is further improved. On the basis of the water model experiments and numerical simulation calculation and in combination of the actual conditions of the Steel Plant it’s strongly recommended the technology of the gas bubbling curtain should be be utilized in lieu of the original weir in the single strand continuous casting tundish and the optimal process parameters of the gas bubbling curtain of the tundish for the stainless steel continuous caster in Taigang be chosen as follows: the wall is positioned 1150mm away from the original weir and the bottom gas blow rate controlled within the limit of about 120 L/min. Related Articles | Metrics Cited: Baidu(17) 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 Method of controlling solidification quality in electroslag remelting process Steelmaking    2007, 23 (04): 56-58，6.   Abstract （725）            Knowledge map    Save The different parameters symbolizing solidification quality and effect of solidification process parameters on solidification quality are analyzed. Relation between melting rate and solidification quality and how the reasonable melting rate is obtained is discussed. It’s an effective method to obtain reasonable solidification structure by computing temperature field and the secondary dendrite arm spacing using mathematical model. Related Articles | Metrics Cited: Baidu(14) Select Study and production practice of double-combining steelmaking Steelmaking    2010, 26 (3): 8-11，2.   Abstract （1566）            Knowledge map    Save The present paper introduces the production practice of refining the steel using “BOFdouble-combining steel-making process” in the Steel-making plant of Laiwu Iron & Steel Co., Ltd, discusses the technological characteristics of this process in the aspects of raw materials charging, slagging technology, blow pattern and use of manganese ore and analyzes in detail the whole process of smelting and enumerates the advantages and disadvantages of the double-combining steel-making process as well as the practical results in implementation of this process in the Plant. Related Articles | Metrics Cited: Baidu(14) Select Temperature Field Testing of the Ring Carriage of 80t Converter and Analysis on Thermal and Mechanical Coupling Stress Steelmaking    2005, 21 (06): 44-47.   Abstract （1943）            Knowledge map    Save The on-site temperatures of the ring carriages of No.1 and No.2 80t Converters of a specific Company are measured, and then on the basis of the measurements effects of water cooling of the carriage and the gap between the carriage and the furnace stack on the temperature field of the carriage and the stress distribution are studied by modeling the temperature field of the two carriages using the finite element method and by threedimensional thermal and mechanical coupling stress analysis, thus providing necessary reference data for design and use of the ring carriage of the converter. Related Articles | Metrics Cited: Baidu(13) Select Macro-segregation in cast bloom of gear steel and its formation mechanism Steelmaking    2011, 27 (5): 63-67.   Abstract （509）            Knowledge map    Save The present paper mainly researched on the carbon macrosegregation and etched macrostructures of cast bloom of gear steel 20CrMnTiH2 produced by Xiangtan Steel with cross section of 300 mm×430 mm in order to find out the relations between the carbon macrosegregation and etched macrostructure and the formation mechanism of carbon macrosegregation. The results show that the segregation degree was positive in columnar zone and columnar to equiaxed transition (CET) boundaries, negative in equiaxed zone and positive again in the center of cast bloom. The carbon segregation distribution morphology turned out to be W style. The carbon content shows a clear relation with the etched macrostructure and it indicates that carbon macrosegregation is related closely with solidification. Related Articles | Metrics Cited: Baidu(13) Select Study and practice on optimization of the flow control device of continuous casting tundish Steelmaking    2009, 25 (01): 28-32.   Abstract （1487）            Knowledge map    Save The flow field behavior of tundish with multi-hole dam in the No.7 billet caster of KISC is researched by hydraulic simulation experiment. Results show that the flow characteristics of every flow in tundish tend to be similar, the initial response time and average residence time of fluid increase, the volume of dead zone decreases and the metallurgical effect of tundish is improved obviously by setting up the multi-hole dam. The design plan of the No.3 multi-hole dam is assumed to be the preferred one. Since application of the experimental results into production the quality of billet has been improved clearly and the non-metallic inclusions of TS800U billet decreased from 52% to 3.5%. Related Articles | Metrics Cited: Baidu(12) Select Analysis on causes to corner cracks in Q345B continuous casting slab XIN Jian-qing;YUE Er-bin Steelmaking    2007, 23 (06): 16-19.   Abstract （1613）            Knowledge map    Save The mechanical property of steel Q345B at elevated temperature is tested and the type of the precipitates existing at the cracks identified and thereupon cause to formation of the corner cracks analyzed and the processing measures to eliminate the defect accordingly put forward. Related Articles | Metrics Cited: Baidu(12) Select Study on Breaking of Steel Wire 72A Steelmaking    2005, 21 (06): 18-22.   Abstract （2326）            Knowledge map    Save By way of analysis on the fracture of steel wire 72A during drawing the wire in the Capital Steel it's concluded that the primary causes to the fracture of the steel are inclusions, segregations and surface quality of the steel. In light of different conditions solutions to the wire breaking are put forward. Related Articles | Metrics Cited: Baidu(12) Select Study on intermedium cracks of continuous casting slab and improvement practice Steelmaking    2007, 23 (04): 25-28.   Abstract （1927）            Knowledge map    Save The type and cause to the formation of the intermedium cracks of the continuous casting slab are analyzed by macro examination and SEM and measures to eliminate the inter- medium cracks are put forward including compositions of the steel,secondary cooling schedule, pressure of driving rollers, soft reduction and support segments. Results show that the sulfur content of steel and support segments are main factors leading to the intermedium cracks. Since adoption of the improvement measures, the rate of the intermedium crack occurrence has been obviously descended. Related Articles | Metrics Cited: Baidu(12) Select A new algorithm of endpoint carbon content of BOF based on of off-gas analysis Steelmaking    2009, 25 (01): 33-37.   Abstract （643）            Knowledge map    Save Various algorithms of controlling the endpoint carbon content of BOF were studied on the basis of off-gas analysis. A new algorithm was suggested by analyzing the advantages and disadvantages of exponential decay models provided by Meyer H. W. and Uemura T. The principle of this algorithm is to standardize decarburization oxygen efficiency divided by the maximum decarburization oxygen efficiency of this heat, take advantage of the information of the reference decarburization curve, and carry out the multipoint calibration for the bath carbon content of this heat. The off-line simulation results for low carbon steel show that this algorithm has good suitability and will play an importance role in improving the control accuracy and hitting rate of the endpoint carbon content in BOF steelmaking practice. Related Articles | Metrics Cited: Baidu(12) Select Innocuous treatment and comprehensive utilization of stainless steel slag Steelmaking    2010, 26 (6): 74-77.   Abstract （1398）            Knowledge map    Save Stainless steel slag is harmful to the environment due to Cr6+, and transformation of Cr3+ to Cr6+ is carrying on continuously when the slag is piling up. Therefore harmless processing and comprehensive utilization should be provided as soon as possible. Innocuous treatment methods include high-temperature reduction (dry method), water-leaching reduction (wet method) and solidification. The comprehensive utilization trend of the stainless steel slag is to resolve the problem of enrichment of harmful sulfur and phosphorus and realize the slag regeneration in order to promote internal recycle of the slag and reduce the external utilization. Related Articles | Metrics Cited: Baidu(11) Select Application of sulfur distribution ratio in optimization of LF ladle slag composition Steelmaking    2009, 25 (03): 37-41.   Abstract （605）            Knowledge map    Save The sulphur content of the Al2O3-CaO-MgO-SiO2 series of various constituents in the slag and the sulphur distribution ratio under the equilibrium condition are calculated and the effects of change of various constituents in the slag and variation of the hot metal temperature on the sulphur distribution ratio analyzed using the empirical expression derived by Ohta and Suito and the Young et al.’s model. By calculation of the sulphur content in the LF refining slag and the sulphur distribution ratio in a specific Steel-making Plant of Shougang the calculation model is validated and the compositions of the refining slag optimized in a bid to achieve the best desulphurization effect. Related Articles | Metrics Cited: Baidu(11) Select Practice on mould level fluctuation control of vertical-bending type caster in refining peritectic steel SONG Ze-qi;CHEN Qing-quan;ZHANG You-hua Steelmaking    2007, 23 (04): 7-10，1.   Abstract （1976）            Knowledge map    Save The present paper analyzed the cause to the mould level fluctuation of vertical-bending type caster in casting the peritectic steel, and introduced the solution to the problem at No.2 steelmaking plant of WISCO including adjustment of the mould cooling and secondary cooling schedules, use of special casting powder and increase in the drawing force and etc. Related Articles | Metrics Cited: Baidu(10)