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一、脱磷的冶金原理铁水或钢水脱磷最好是在氧化条件下和在碱性渣下进行。在炼铁生产的正常还原条件下或钢水在低氧化铁的熔渣下脱氧时,从铁水或钢水中去除磷的数量大体相同。 1.铁水脱磷铁水用石灰渣或苏打渣脱磷的反应式为2〔P〕+5〔O〕+4(CaO)(?)(4CaO·P_2O_5) (1)2〔P〕+5〔O〕+3(Na_2O)(?)(3Na_2O·P_2O_5) (2) 硅酸钙和硅酸钠的化学稳定性比磷酸钙和磷酸钠好(见图1),因此必须对铁水进行预先脱硅。这样才能用石灰或苏打碱性渣进行有效的脱磷。除此之外现有的热力学数据表明,达到平衡时,特别是在较低的温度下,
First, the metallurgical principle of dephosphorization Hot metal or molten steel dephosphorization is best carried out under oxidizing conditions and alkaline slag. The amount of phosphorus removed from the hot metal or molten steel is generally the same during normal reduction of the ironmaking process or when the molten steel is deoxidized under the slag of the low iron oxide. (1) 2 [P] +5 [O] + [O] +4 (CaO) (?) (4CaO · P2O5) (2) Calcium silicate and sodium silicate chemical stability than calcium phosphate and sodium phosphate is good (see Figure 1), so the molten iron must be pre-desilication . In order to use lime or soda alkaline slag for effective dephosphorization. In addition to the available thermodynamic data, it shows that when equilibrium is reached, especially at lower temperatures,