Rong Zhu

Bottom-Blown Stirring Technology Application in Consteel EAF

Bottom blown stirring technology application in EAF was studied in this paper. The basic principle of bottom blowing process was researched, the bottom blown stirring can give strong stirring effect on the molten steel bath, thus bath mixing time was shortened, decarburization and dephosphorization were improved, however over stirring would lead to liquid steel incontact with atmosphere air. Reasonable process was considered on Consteel EAF. results show that: with bottom-blown stirring technology, decarburization and dephosphorization increase significantly; oxygen and lime consumption decrease; content of FeO in final slag reduces; and heat time becomes short.

Study of Optimizing Combined-Blowing in EAF Based on K-Medoids Clustering Algorithm

The integrated technology of oxygen blowing and bottom blowing was the core of EAF combined-blowing. Todays process model can not exactly describe the control of combined-blowing. In this paper, the EAF steelmaking history data was analyzed by K-medoids clustering algorithm which is data mining technology. Different clustering results were obtained under the cost of steelmaking, oxygen consumption, and etc. Finally, the optimizing combined-blowing curve is found out by analyzing the classified results. In the early of smelting, the flow rate of No.1 oxygen lance and No.2 oxygen lance is increased to improve the strength of decarburization and the pace of smelting. In the late of smelting, door oxygen lance starts to be used for dynamics conditions of carbon-oxygen reaction. The two bottom blowing lance use argon instead of nitrogen after 21 minutes in order to protect the steel components.

Experiment Research of Non-Carbon Metallurgy with Clean Energy

Experiment research on non-carbon metallurgy was explored, which contained three parts: smelting in high temperature, electrolytic iron and hydrogen reduction. A complete set of non carbon metallurgy system should include four technical units: power generation, electric power storage, control module, metallurgy unit. Energy and high temperature over 1600°C can be offered by technology on non-carbon metallurgy, electron also can be offered for hydrogen reduction and electrolysis. Technological parameters and results of three kind experiments were analysed and discussed, the feasibility of this technology and processes were proved.