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Exothermic acid slag-forming mixt. for refining tapped steel - contg. perlite or fluorspar to increase combustion

机译:放热酸渣混合料。用于精炼螺纹钢-续珍珠岩或萤石增加燃烧

摘要

An exothermic slag-forming mixt. contains (by wt.) 0.1-15% Al powder, 24-40 NaNO3, 5-15% CaO, 0.1-20% Si-coating component, 5-15% expanded perlite as fluorspar with the balance being a SiO2-contg. component. Suitably the Si-contg. component is 0.1-6% of powdered Si, the other components then being 9-15% Al powder, 28-30% Na2NO3, 5-15% CaO, 5-15% expanded perlite or fluorspar and balance silica-contg. component. The compsn. produces a molten acid slag for refining tapped steel from a high-prodn. basic open hearth furnace or converter. It is esp. useful for ball-bearing or stainless steels. The presence of perlite or fluorspar in the mixt. increases the combustion rate and thereby facilitates melting without the considerable cost increase involved in achieving the same result by increasing Al content.
机译:放热的熔渣混合物。含有(按重量计)0.1-15%的铝粉,24-40%的NaNO3、5-15%的CaO,0.1-20%的硅涂层成分,5-15%的膨胀珍珠岩作为萤石,其余部分为SiO2含量。零件。合适地是Si-contg。成分为粉末状Si的0.1-6%,然后其他成分为9-15%的Al粉,28-30%的Na2NO3、5-15%的CaO,5-15%的膨胀珍珠岩或萤石,其余为二氧化硅。零件。该compsn。产生熔融的酸渣,用于从高产品中精炼出钢。基本的平炉或转炉。尤其是。适用于滚珠轴承或不锈钢。混合物中存在珍珠岩或萤石。通过增加铝含量来获得相同的结果,而不会增加可观的成本增加,从而提高了燃烧速率并因此促进了熔化。

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