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碲化铜渣的硫酸化焙烧—碱浸碲试验研究

Hydrometallurgy of China(2019)

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Abstract
研究了采用硫酸化焙烧—氢氧化钠浸出工艺从碲化铜渣中浸出碲,考察了焙烧时间、焙烧温度、硫酸用量、氢氧化钠浓度、浸出温度、浸出时间对碲浸出率的影响.结果表明:碲浸出率受碲化铜渣硫酸化焙烧温度影响明显;在硫酸用量为碲化铜渣质量61%、焙烧温度500℃条件下焙烧3.0 h,然后在75℃下用4 mol/L氢氧化钠溶液浸出2.0 h,浸出液中铜质量浓度为2.8 mg/L、碲质量浓度为49.39 g/L,浸出渣中铜、碲质量分数分别为72.42%和1.59%,碲浸出率96.01%,碲铜分离彻底.
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