Study On Effect Of BF Burden Metallurgical Performances On Coal Injection Of Han Steel

It is well known that the burden metallurgical performances influence BF directly,but how much they impact the coal ratio are different.Now,there is a lower coal ratio in Han steel BF.Research on effect of metallurgical performance of blast furnace burden on coal injection in Han Steel BF under the existing condition.Study on effect of metallurgical performance of blast furnace burden in laboratory.Firstly,this paper research metallurgical performance of the ore sinter and pellet metallurgical properties.It has present some reasonable burden structure of BF and analyse influence on these element to coal ratio.At the same time,it also research on the existence form and influence of the UPC in the ash and slag.we can get the conclusion as follows.The quality of iron ore is not the most important element which limits coal ratio.while the quality of coke and the using of UPC is the primary factor.It founds that the quality of coke is not desired.Compared to the coal ratio,it greatly influences the coal ratio,and the hot capability of coke is more important.The CRI of coke decreases 1%,the coal ratio may increase about 5~9 kg/t.The CSR of coke increase 1%,the coal ratio may increase about 5~9 kg/t.The replacement ratio of Han Steel is different in variational coal ratio.The replacement ratio of NO.7 BF is low, the highest replacement ratio is only 0.83.Influence the most primary factor among the replacement ratio are the carbon content of coal and coke.The carbon content of coal increases 1%, the replacement ratio may increase about 0.15 The carbon content of coke decreases 1%, the replacement ratio may increase about 0.015.The carbon content of the BF dust and sludge are both high. The carbon content of the BF dust is more higher than BF sludge.The carbon element which is in BF dust mainly come from the coke and fewer come from the UPC and the carbon element which is in BF sludge mainly come from the UPC and fewer come from the coke.While with the increase of UPC content in the slag, the slag viscosity and the melting temperature both increase.