Abstract: Optimization of deoxidization process and choice of new kinds of deoxidizers were studied systematically to reduce production cost of plain carbon steel. Deoxidation ability of common deoxidizing material was analysed by thermodynamic analysis, and the costs of different deoxidizers were evaluated, and appropriate deoxidization processes have been formulated. Concretely, cheap carburant was added to molten steel during tapping process for pre-deoxidization, and then silicon iron and silicon-manganese alloy were added to molten steel for deoxidization and alloying treatment. Lastly, aluminum wire was fed for deep deoxidization in the argon bubbling station. With the application of the new technology, the production system run smoothly, and the components and total oxygen content of the product could be controlled in the required range, and furthermore, the FeO content became more stable. On this basis, the cost of deoxidizer alloys reduced by 6.68 yuan/t.

Key words: plain carbon steel, low-cost, deoxidation, deoxidant