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Volume 18 Issue 2
Apr 2007
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Zheng Jianhua (郑建华), Luo Hongyu (罗红玉), Tian Xike* (田熙科), Wang Longyan (王龙艳), Yang Chao (杨超), Pi Zhenbang (皮振邦). Neutral Leaching of Low-Grade Pyrolusite with High Silica Content. Journal of Earth Science, 2007, 18(2).
Citation: Zheng Jianhua (郑建华), Luo Hongyu (罗红玉), Tian Xike* (田熙科), Wang Longyan (王龙艳), Yang Chao (杨超), Pi Zhenbang (皮振邦). Neutral Leaching of Low-Grade Pyrolusite with High Silica Content. Journal of Earth Science, 2007, 18(2).

Neutral Leaching of Low-Grade Pyrolusite with High Silica Content

  • Received Date: 15 Jul 2018
  • Rev Recd Date: 15 Jul 2018
  • Publish Date: 15 Jul 2018
  • Leachingstudiesoflow-gradepyrolusite,containing11.84%Mnwithhighsilicon,werecarriedoutusingsodiumsulfiteasareductantinammoniumsulfatemedium.Variousprocessparametersincludingtemperature,leachingtime,solid-liquidratio,quantityofammoniumsulfate,aswellastheamountofreducingagentwerestudiedindetail.Themanganeseextractionyieldwastheresponseoftheprocess.Temperatureandreagentconcentrationexertedthemostimportantpositiveeffectonthemanganeseextraction.Theoptimizedconditionsshowedthatwhentheamountofreducingagentwasastoichonmetricamount,over90%manganeseextractionandthelowestimpuritieswereachieved,theamountofheavymetalimpuritiesinthemanganeseleachingliquidwaslessthan5mg/L,andalmostnoironandaluminumwereextractedin3mol/Lammoniumsulfateconcentrationat100℃in45min.

     

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