铁硫合金制备工艺的优化

Optimization of preparation technology of iron-sulfur alloy

在火法炼铜过程中,用密度和熔点合适的铁硫合金消除沉降电炉过厚的炉结是较为理想的方法。结合前期研究,对制备铁硫合金工艺进行了优化。运用金相显微镜、XRF进一步探索了制备铁硫合金的过程中,二元碱度(R=m(CaO)/m(SiO2))、碳粒度及碳添加比对铁硫合金密度和汇聚率的影响。结果表明:二元碱度为1.3、碳粒度为0.25~<0.42 mm、碳添加比为1时,制备出的铁硫合金密度和汇聚率较优;较优制备条件下铁硫的实际利用率为85.11%,损失在渣中的铁远高于硫,因此制备出的铁硫合金实际硫含量偏高。

In the process of copper smelting by fire,it is an ideal method to eliminate the over thick furnace structure of the settling furnace by using iron sulfur alloy with appropriate density and melting point.Regards to previous research,the process of preparing iron-sulfur alloy was optimized.The effects of the binary basicity(R=m(CaO)/m(SiO2)),the carbon particle size and the carbon addition ratio on the density,and the convergence rate of the iron-sulfur alloy in the process of preparing the iron-sulfur alloy were further explored by means of the metallographic microscope and XRF.The results show that when the basicity is 1.3,the carbon particle size is 0.25~<0.42 mm,and the carbon ratio is 1--the density and aggregation rate of the prepared sulfur iron alloy is the best;under the best preparation condition,the actual utilization rate of sulfur iron is 85.11%,and the loss of iron in slag is much higher than that of sulfur,so the actual sulfur content of the prepared sulfur iron alloy is high.