黄铵铁矾法除铁同时浸出碳酸锰矿的研究
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摘要
针对高铁锰矿浸出液铁离子浓度较高的问题,采用黄铵铁矾沉淀法除铁,并使用碳酸锰矿中和沉矾过程所释放的硫酸,研究了反应温度、反应时间、硫酸铵用量和碳酸锰矿用量对除铁率和锰浸出率的影响。结果表明,在反应温度95.0℃、反应时间180min、硫酸铵用量为理论用量的1.3倍、碳酸锰矿用量为12.0g的条件下,除铁率可达95.7%,总锰浸出率为92.9%,碳酸锰矿浸出率为88.3%。
To address high content of ferric iron in leachate of iron rich manganese oxide ores,jarosite precipitation was used to remove iron,and manganese carbonate ore was used to neutralize sulfuric acid produced in jarosite precipitation.Effects of reaction temperature,reaction time,(NH4)2 SO4 dosage,and dosage of manganese carbonate ore on precipitation rate of iron and manganese leaching efficiency were investigated.The results show that iron removal rate is 95.7%,total leaching rate of manganese is92.9%,and leaching rate of manganese carbonate ore is 88.3% under the conditions including reaction temperature of 95 ℃,reaction time of 180 min,(NH4)2 SO4 dosage of 1.3 times of theoretical amount,and dosage of manganese carbonate ore of 12.0 g.
To address high content of ferric iron in leachate of iron rich manganese oxide ores,jarosite precipitation was used to remove iron,and manganese carbonate ore was used to neutralize sulfuric acid produced in jarosite precipitation.Effects of reaction temperature,reaction time,(NH4)2 SO4 dosage,and dosage of manganese carbonate ore on precipitation rate of iron and manganese leaching efficiency were investigated.The results show that iron removal rate is 95.7%,total leaching rate of manganese is92.9%,and leaching rate of manganese carbonate ore is 88.3% under the conditions including reaction temperature of 95 ℃,reaction time of 180 min,(NH4)2 SO4 dosage of 1.3 times of theoretical amount,and dosage of manganese carbonate ore of 12.0 g.
引文
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[2]钟琼.低品位锰矿中锰浸出的工艺技术评述[J].中国锰业,2013,31(5):8-10.
[3]JU S H,ZHANG Y F,ZHANG Y,et al.Clean hydrometallurgical route to recover zinc,silver,lead,copper,cadmium and iron from hazardous jarosite residues produced during zinc hydrometallurgy[J].Journal of Hazadous Materials,2011,192(2):554-558.
[4]阳卫军,屈晓娟,朱利军.低品位软锰矿浸出液中铁的去除方法研究[J].湖南大学学报(自然科学版),2014,41(1):107-111.
[5]JIANG H J,FRANK LAWSON.Reaction mechanism for the formation of ammonium jarosite:thermodynamic studies and experimental evidence[J].Mineral Processing and Extractive Metallurgy,2004,113(3):175-181.
[6]王乾坤,马荣骏,谭洎曾.黄铁矾法除铁动力学研究及应用(I)-草黄铁矾沉淀的研究[J].矿冶工程,1985,5(4):48-53.