Abstract This work aimed at producing a ferric chloride coagulant from an iron ore tailing. The investigated variables were temperature, hydrochloric acid concentration, and heating time. The results indicated increasing solubilization of iron as a function of HCl concentration and temperature. Leaching carried out with a 10.8 mol L-1 of HCl at a temperature of 80° for 120 min resulted in a 94% recovery of iron present in the iron ore tailing. The leachate presented 11% Fe in its composition and a low concentration of contaminants. This enabled the liquor to be used as a coagulant and the water treatment experiment showed the effectiveness of the reagent. The solid phase remaining from the leaching process is a fine powder reached in silica, with potential use in other industrial segments. The results indicate that the production of coagulants may be considered to extend the productive chain of iron ore extraction and to minimize the amount of tailings to be discharged in tailings dams or dry stacking.

中文翻译：

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铁尾矿浸出生产氯化铁混凝剂

摘要 这项工作旨在从铁矿石尾矿中生产氯化铁混凝剂。研究的变量是温度、盐酸浓度和加热时间。结果表明，铁的溶解增加是 HCl 浓度和温度的函数。用 10.8 mol L-1 的 HCl 在 80° 的温度下浸出 120 分钟，结果铁矿石尾矿中存在的铁的回收率为 94%。渗滤液的成分中含有 11% 的铁和低浓度的污染物。这使得该液体能够用作混凝剂，并且水处理实验显示了该试剂的有效性。浸出过程中剩余的固相是二氧化硅中的细粉，可用于其他工业领域。