Plating grade copper sulfate is prepared from low-grade copper oxide ores by leaching, extraction,back extraction, crystallization and purification process. The effects of extractant concentration, O/A ratio, extraction time and sulfate acid concentration on extraction rate are investigated. The results show that the leaching rate of copper is up to 65％ after the low-grade copper oxide mineral is leached by sulfate acid. The extraction rate is up to 90％ after copper is extracted by M5640 when extractant concentration is 20％, O/A ratio is 1/3, extraction time is 120 s, sulfate acid concentration is 1.5 g/L, diluent is kerosene. The purity of plating grade copper sulfate is 93.35％ after the loaded organic phase is treated by back extraction, crystallization and purification process of strip liquor.%以低品位氧化铜矿为原料,采用浸出、萃取、反萃、结晶和精制工艺制备电镀级硫酸铜.重点考察了萃取剂浓度、相比(O/A)、萃取时间和水相中硫酸浓度等因素对铜萃取率的影响.结果表明,采用硫酸浸出氧化铜,铜浸出率可达65%.浸出液用萃取剂ACORGA M5640萃取铜,当萃取剂浓度为20%,相比为1/3,萃取时间为120 s,水相中硫酸浓度为1.5g/L,稀释剂为煤油时,铜萃取率可达90%以上.负载有机相经反萃,反萃液经结晶和精制后,可得到纯度为99.35%的电镀级硫酸铜.
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