含制碱残渣的铁水脱磷复合剂的实验研究

Experimental study on alkali slag containing dephosphorizer for hot metal pretreatment

研究了CaCl2、CaF2和碱度对脱磷的影响,使用制碱工业残渣配合萤石进行脱磷。结果表明:同时使用CaCl2和CaF2的脱磷效果要比单独使用其中一种助熔剂要好;使用碱渣代替CaCl2进行铁水脱磷,R=2,脱磷剂中添加质量分数为14.8%的碱渣和5.99%的CaF2对铁水脱磷时,脱磷率达到了86%;含碱渣脱磷剂中添加BaCO3能显著降低熔点,提高脱磷率。

The influence of CaCl2 ,CaF2 and basicity on dephosphorization was investigated. The experiments of dephosphorization of hot metal by using alkali slag and fluorite were performed in the lab. The results show that the dephosphorization effect using both of CaCI2 and CaF2 is better than using either of them exclusively. When alkali slag is used in substitution of CaC12 in hot metal dephosphorization R = 2 and When the mass fraction of the dephosphorizer addition comes up to 14. 8% of the total alkali slag content and the CaF2 amounts to 5.99% the dephosphorization rate reaches 86%. The melting point can be lowered and the dephosphorization rate raised by adding BaCO3 into the alkali dephosphorizer.