Application and research of kiln slagon converter steelmaking
Kiln slag is the product obtained by sintering,ironmaking,steelmaking dust removal,coke powder,and flux in a rotary kiln,followed by zinc extraction.Kiln slag has the characteristic of containing both elemental iron and iron oxide,and its properties are between that of scrap steel and sintered ore.Due to its high iron content,low price,and fast melting rate,it can be used as a coolant to replace scrap steel and as a slag remover to replace sin-tered ore.It can not only reduce production costs,but also improve the stability and dephosphorization effect of the blowing process.The experiment shows that the cooling effect of kiln slag is about 1.5 times that of scrap steel;Af-ter replacing some scrap steel and sintered ore with kiln slag,the dephosphorization rate increased by 2.9%,and the phosphorus distribution ratio between slag and steel increased by 9.3;An average of 0.4 kg of molten steel can be recovered by adding 1 kg of kiln slag per ton of steel,but at the same time,the sulfur content increases by 0.00052%,and the comprehensive cost is reduced by 0.51 yuan/t.
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