摘要
针对含铁低品位氧化锌矿石,进行了碱性浸出与硫酸浸出研究。其中碱性浸出主要考察了采用不同浸出剂时浸出时间以及采用氨水———氯化铵作浸出剂时浸出温度对锌、铁浸出率的影响;硫酸浸出主要考察了硫酸初始浓度、矿浆液固比以及不同硫酸初始浓度时浸出温度和不同浸出温度时浸出时间对锌、铁浸出率的影响。研究结果表明,碱性浸出时锌浸出率不到50%,铁基本不被浸出;XRD分析结果说明,碱性浸出时浸出的主要是菱锌矿。硫酸浸出时锌浸出率最高可达87%以上,但铁的浸出率也在45%以上;XRD分析结果说明,硫酸浸出在低浓度如小于60 g/L或短浸出时间如10 min时浸出的主要是菱锌矿,在高浓度如大于60 g/L或较长浸出时间如大于10 min时浸出的主要是菱锌矿与菱铁矿。
Alkaline leaching and sulfuric acid leaching of low grade zinc oxide ore bearing iron were studied in this work.The effecting factors,such as leaching time in different leaching agents and leaching temperature using ammonia-ammonium chloride as leaching agent,on zinc and iron leaching rates were investigated in alkaline leaching.The effecting factors,such as the initial sulfuric acid concentration,liquid-solid ratio,leaching temperature in different initial sulfuric acid concentrations and leaching time in different leaching temperatures,on zinc and iron leaching rates were studied in sulfuric acid leaching.The results showed that the leaching rates of zinc and iron were less than 50% and zero in alkaline leaching,respectively,while their leaching rates were greater than 87% and 45% in sulfuric acid leaching.The results of XRD analysis indicated that smithsonite was leached from the ore in alkaline leaching or in sulfuric acid leaching with low initial concentration such as less than 60 g/L or shorter time such as less than 10 min,and smithsonite and siderite were leached from the ore in sulfuric acid leaching with high initial concentration such as greater than 60 g/L or longer time such as more than 10 min.
出处
《广西大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第6期1042-1047,共6页
Journal of Guangxi University（Natural Science Edition）
基金
教育部新世纪优秀人才支持计划项目(NCET-10-0091)
广西自然科学基金资助项目(2010GXNSFD013005)
广西研究生教育创新计划项目(105931001009)
关键词
低品位
氧化锌矿
碱性浸出
硫酸浸出
low grade
zinc oxide ore
alkaline leaching
sulfuric acid leaching
