烧结锰矿酸浸试验

Study on Acid Leaching of High Temperature Sintered Manganese Slag

针对某烧结锰矿,主要研究有机酸和无机酸快速回收其中的各种元素。探讨在常温下乙酸、草酸、柠檬酸、盐酸、硫酸对Mn、Si、Ca、Mg、Fe的浸出效果。试验发现5 g锰矿、液固比50 mL g、2.50 mol L草酸投加10 mL的浸出效果最佳,Mn、Si、Mg浸出率分别为52.01%、66.53%和77.84%,原因是草酸酸性较强且对各元素具有络合作用。为提高Si的浸出率以获得可溶性硅,5 g锰矿在250 mL的0.50 mol L草酸溶液中反应1 h,上清液中添加碳酸氢铵可获得固体可溶性硅,该可溶性硅的有效硅含量为61.86%,该结果可为制硅工艺提供有效参考。最后对各酸与各元素之间的吸附能和电子转移量进行了计算模拟。

Rapid recovery of various elements from sintered manganese ore by organic and inorganic acids was investigated.The leaching effects of acetic acid,oxalic acid,citric acid,hydrochloric acid,and sulfuric acid on leaching of Mn,Si,Ca,Mg,and Fe at room temperature were discussed.The experiments find that the experimental group with L S=50 mL g and 2.50 mol L oxalic acid of 10 mL has the best leaching effect,and the leaching rate of Mn,Si,and Mg is 52.01%,66.53%and 77.84%,respectively.The best leaching effect of oxalic acid is due to the strong acidity of oxalic acid and its complexing effect on various elements.In order to improve the leaching rate of Si to obtain soluble silicon,5 g of manganese ore was reacted in 250 mL of 0.50 mol L oxalic acid solution for one hour,and ammonium bicarbonate was added to the supernatant to obtain solid soluble silicon.The effective silicon content of the soluble silicon is 61.86%.The experimental results can provide an effective reference for the silicon production process.Finally,the adsorption energy and electron transfer amount between each acid and each element were simulated and calculated.