Coal was used as reducer in traditional technology in order to convert manganese dioxide to manganese oxide, then leaching by sulfuric acid. But there are many disadvantages such as consuming too much energy, bad operation condition and polluting environment.
传统工艺是用煤作还原剂焙烧，使软锰矿中MnO2转化为MnO，然后用硫酸浸出，但该法存在着能耗高、操作条件差、环境污染较严重等问题。
参考来源 - 软锰矿无煤还原制备硫酸锰新工艺研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Remove of iron from sulfuric acid leaching solution of ferrochromium alloy by goethite is researched.
研究了用针铁矿法从铬铁合金硫酸浸出溶液中除铁并回收铬。
Thermodynamic analysis results show that tellurium can be leached by sulfuric acid leaching method from lead-rich tellurium slag.
并通过硫酸浸出高铅碲渣中碲的条件实验验证了热力学分析的结果。
The extracting iron from pyrite cinder by reductive roasting and sulfuric acid leaching was investigated.
研究了高温还原焙烧、硫酸浸取提取硫铁矿烧渣中的铁。
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