不同稳定化处理转炉钢渣中磷元素的分布

以钢渣除磷为目标，通过对化学成分、矿物相形貌及相成分分析，研究了3种不同稳定化处理工艺所得转炉钢渣中磷元素的分布情况。结果表明：钢渣中的磷元素主要分布于硅酸二钙和磷酸三钙形成的固溶体相中，剩余少量受钢渣碱度或冷却速度等因素影响而未进入硅酸二钙-磷酸三钙固溶体中的磷元素存在于硅酸三钙或冷凝渣相中。应设法利用钢渣中磷元素的这种分布规律分离出钢渣中的含磷相，使钢渣得以返回冶金流程循环利用，而分离出来的部分则可以考虑用作生产钙硅磷肥的原料。

Distribution of Phosphorus in Converter Steel Slags Stabilized in Different Ways

To remove the phosphorous in steel slags, the distribution of phosphorous in the converter slags treated by three different stabilization processes was studied by the analysis of the chemical composition, mineralography and phase composition. The results showed that the phosphorous is mainly distributed in the solid solution phase formed by dicalcium silicate and tricalcium phosphate and the residual that doesnt go into the above solid solution due to the slag alkalinity or cooling speed will exist in trlcalcium silicate or condensed slag phase. It is suggested to take advantage of the law of the phosphorous distribution in steel slag to separate the phosphorous-containing phase so as to make it possible for the steel slag to be recycled to the metallurgical flowsheet. It can be considered to use the separated materials as the raw material for producing calcium-silicon phosphorous fertilizer.