In order to increase the accuracy of the end control of the duplex process, the production cost is reduced. Based on material balance and thermal balance as the theoretical basis, combined with Jingtang production data, application of C# software to design the joining and cost calculation model of duplex process materials. Through the model analysis, under the conditions of certain molten iron and molten steel, the effect of changing the C content, temperature and P content of the dephosphorization furnace (DepBOF) on the addition amount and cost of lime, dolomite, ore and heating agent in the whole double process. The results show that changes in the end temperature and composition have an effect on the amount of the abovementioned materials. The amount of the heating agent has the most significant influence on the cost of the materials. Therefore, the heating agent should be minimized when meeting the endpoint requirements of the decarburization furnace (DecBOF) and the amount of scrap steel. When DepBOF endpoint w([P]) and the temperature are constant, the higher DepBOF endpoint w([C]), the lower the auxiliary material cost. So in the DepBOF should be as little as possible decarbonize to 3.635%, the lowest cost of materials. When the DepBOF endpoint w([C]) and w([P]) are unchanged, the lower the DepBOF endtemperature is better, but when the temperature is lower than 1 333 °C, due to the addition of DecBOF heating agent, the cost increased significantly. When the endpoint w([C]) and temperature of the DepBOF are constant, the DecBOF lowtemperature conditions should be utilized to remove as much phosphorus as possible. Under the existing technological conditions, when the endpoint w([P]) from 0.029% to 0.033%, the cost of materials is the lowest.
许振南,徐安军,邓帅. 基于辅料成本控制的京唐脱磷炉终点优化模型[J]. 中国冶金, 2018, 28(11S): 58-64.
XU Zhennan,XU Anjun,DENG Shuai. Endpoint optimization model of Jingtang dephosphorization furnace based on material cost control[J]. China Metallurgy, 2018, 28(11S): 58-64.