RESEARCH AND PRACTICE OF BLAST FURNACE INJECTION COKE DUST REMOVAL ASH
In order to solve the problems of environmental pollution caused by coke dust removal ash and difficult efficient and low-carbon treatment,a comparative experiment on the performance of blast furnace coal injection with different proportions of coke dust removal ash was designed based on its physical and chemical characteristics,and the effect of coke dust removal ash on the performance of mixed coal was studied by using bituminous coal ratio to stabilize 45％and replacing different proportions of anthracite with coke dust removal ash.The experimental results show that when the proportion of coke dust removal ash is 3％,the combustion performance index of mixed pulverized coal is relatively the best.When the dosing ratio is 5％,the combustion rate of mixed pulverized coal is relatively optimal.When the dosing ratio is 8％,the grindability index and ash melting point of mixed pulverized coal are relatively the best.Through further industrial experiments,the smelting parameters and cost changes of blast furnace coal injection with different proportions of coke dust removal ash were studied,and it was clear that the optimal ratio of coke dust removal in blast furnace coal injection was 5％.Through the blast furnace injection coke dust removal ash,it can not only give full play to the price advantage of coke dust removal ash and reduce the fuel cost of blast furnace by 7.80 yuan/ton,but also effectively solve a series of environmental protection problems derived from coke dust removal ash in the process of storage and transportation,realize zero solid waste emission in the coking process,reduce carbon dioxide emissions by 40.82 kg/year per unit production capacity of the iron pre-process,and achieve the effect of efficient and low-carbon treatment of coke dust removal ash.
万方数据
维普
