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提取了V、Cr等若干元素之后的铁水习惯称为“半钢”.本文叙述了在顶吹转炉热模型和顶吹转炉所做的“半钢”吹炼生产和试验的若干结果.由于“半钢”几乎不含硅、锰等元素,快速加入炉渣助熔剂以避免粘枪成为本文讨论的主题.作为炼钢熔渣主要成分的石灰熔点很高.试验中发现一定含最的V_2O_3、TiO_2及Cr_2O_3(高熔点化合物)均能降低炉渣的熔点.为了溶解高熔点的石灰,我们试验采用了由SiO_2、Al_2O_3、MgO、FeO和一些其他氧化物组成的若干天然复合矿物,如辉绿岩,玄武岩、粘土等.这些天然复合矿物具有较低的熔点并且能满足流动性好的高碱度炉渣的去硫作用.试验结果表明冶炼过程是平稳的,而且脱硫是满意的.作者认为我国大量存在的高硅贫锰矿、钒钛磁铁矿尾矿也可能是“半钢”炼钢的良好炉渣助熔剂.
After extracting some elements such as V and Cr, the hot metal is called “semi-steel” .This paper describes the production and testing of “semi-steel” blowing in the top-blowing converter thermal model and top-blowing converter As the “semi-steel ” contains almost no silicon, manganese and other elements, the rapid addition of slag flux to avoid sticking gun to become the subject of this article as the main component of the steelmaking slag melting point is very high, the test found a certain Containing the most V 2 O 3, TiO 2 and Cr 2 O 3 (high-melting compounds) can reduce the melting point of the slag.In order to dissolve the high melting point of lime, we tested using a number of natural composite minerals composed of SiO 2, Al 2 O 3, MgO, FeO and some other oxides , Such as diabase, basalt, clay, etc. These natural complex minerals have a lower melting point and can satisfy the desulfurization effect of high basicity slag with good fluidity.The results of the tests show that the smelting process is stable and the desulfurization is satisfactory The authors believe that the high - silicon depleted manganese ore and vanadium - titanium magnetite tailings in China may also be good slag fluxes for “semi - steel” steelmaking.