正交法研究钢渣中提取Ca2的可行性.pdf

粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2011NO.5 试“验与应用 正交法研究钢渣中提取Ca2的可行性 Study the Feasibility of Extracting the Calcium from Steel Slag with Orthogonal Method 黄辉 (同济大学材料工程研究所，上海200092) 摘要：用甲酸对钢清进行处理以提取钢渣中的钙，溶出的钙和剩余的高铁钢渣可以分别加以利用.试验采用正交 法进行.试验结果表明，甲酸浓度对钙离子溶出率的影响最大，酸、渣比例的影响次之，反应时间的影响最小；而对于铁 离子的溶出率来说，酸、渣比例的影响最大，酸浓度的影响次之，反应时间的影响最小.当酸、渣比例为1：2，反应时间 1d 酸浓度为15%时，钢渣中钙离子溶出量相对较多，铁离子的溶出量较少，即效果最好.此时，钙离子溶出率为43. 33% 铁离子的溶出率为0. 关键词：钢渣；正交；钙；铁；甲酸 中图分类号：X757文献标识码：A 文章编号：1005-8249(2011)05-0031-04 Huang Hui (The Materials Ergineering Institute of Tongji Uniersity Shanghai 200092) Abstract:We use Formic acid to process steel slag in order to extract the calcium.Dissolution of calcium and the residual high iron containing steel slag can be used separately.The main constituents of steel slag are calcium oxide iron oxide magnesium oxide ailicon oxide ete Above all calcium oxide is easily reacted with Formic acid.Because the main factors of the reaction are time acid concentration and the ratio of acid with steel slag this experimental study use the orthogonal method.The results showed that Formic acid concentration has the greatest impact on the dissolution rate of calcium the following factor is ratio of acid with steel slag and the last is the reaction time Finally We use the prehesive balance.method to discuss the two dissolution rate of ealcium and iron.We obtain the result that when the ratio of acid with steel slag is 1:2 the reaction time is 1 days the acid concentration reaches 15% th...