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电弧炉炼钢粉尘中含有多种重金属 ,若填埋弃置会对环境造成污染 .将粉尘与还原剂碳粉混合制粒后返回电弧炉 ,并补充硅铁还原粉尘中难还原的金属 ,有价金属还原后回收于钢液中 ,不仅能生产不锈钢或特种钢 ,而且能保护环境 .制粒时使用木质磺酸钙作为粘结剂 ,而木质磺酸钙中含有硫 ,可能影响钢材质量 ,影响程度取决于冶炼过程中炉渣的条件 .经改变初始熔铁、球团、硅铁和石灰加入的量比关系进行实验 ,采用X射线荧光分析仪检测炉渣成分进行计算热力学研究 ,确定了 15 5 0℃时CaO MgO FeO Fe2 O3 SiO2 S体系炉渣中各物质的浓度 (摩尔分数 )和炉渣的氧化与脱硫能力 ,其氧化能力可用n(FetO) =n(FeO) + 6n(Fe2 O3) + 8n(Fe3O4 )表示 ;此外 ,确定了还原过程中脱硫能力与氧化能力、硅铁和石灰的加入量以及炉渣的碱度之间的关系 .通过实验 ,建立了电弧炉粉尘直接还原过程中炉渣体系的计算热力学数学模型 ,可为实际生产提供理论依据
Electric arc furnace steel dust contains a variety of heavy metals, if landfill will pollute the environment will be dust and reducing agent mixed powder granulation return to the electric arc furnace, and replenishment of ferrosilicon reducing dust difficult to reduce the metal, valuable Metal reduction recovery in the molten steel, not only can produce stainless steel or special steel, but also to protect the environment. Granulation use of calcium lignosulfonate as a binder, and calcium lignosulfonate contains sulfur, may affect the quality of steel, the impact The degree depends on the conditions of the slag in the smelting process.Through the experiment of changing the relationship between the amount of the initial molten iron, the pellets, the ferrosilicon and the lime, the composition of the slag was analyzed by X-ray fluorescence analyzer and the thermodynamic calculation was made, ℃ CaO MgO FeO Fe2 O3 SiO2 S system slag concentration (mole fraction) and slag oxidation and desulfurization capacity, the oxidation capacity available n (FetO) = n (FeO) +6 n (Fe2 O3) +8 n Fe3O4) .In addition, the relationship between desulphurization capacity and oxidation capacity, addition amount of ferrosilicon and lime, and basicity of slag was determined in the reduction process.Through experiments, the direct reduction process of electric arc furnace dust was established In the calculation of the slag system thermodynamic mathematical model, can provide a theoretical basis for the actual production