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首页> 外文会议>Materials processing fundamentals 2018 >The Study of Copper Leaching from Conichalcite and Chalcopyrite Using Alternative Lixiviants
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The Study of Copper Leaching from Conichalcite and Chalcopyrite Using Alternative Lixiviants

机译：替代铅锌矿对黄柏和黄铜矿浸铜的研究

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This project investigated alternative lixiviants for leaching copper from chalcopyrite and conichalcite, two highly refractory Cu ore minerals. Chalcopyrite (CuFeS_2) is the most abundant of the copper sulfide minerals; conichalcite (CaCuAs0_4OH) is less well known but contributes to supergene Cu inventory in high-As deposits. Neither leaches well in sulfuric acid. Sulfurous acid, glycine, methanesulfonic acid (MSA), and thiourea (for conichalcite leaching test) were tested as lixiviants for chalcopyrite- and conichalcite-bearing ores with ferric sulfate or hydrogen peroxide as oxidant. The highest Cu extraction from chalcopyrite was obtained by MSA (47% Cu recovery in 30 g/L of MSA with 5 g/L Fe~(3+) at 75 °C within 96 h; nearly 100% Cu extraction in 30 g/L MSA with 3% hydrogen peroxide at 75 °C within 72 h). Glycine recovered 20.7% of copper from chalcopyrite at room temperature within 96 h. All these compare favorably to the results of sulfuric acid leaching of chalcopyrite (1.5% recovery at 96 h). Conichalcite proved less refractory to sulfuric acid (46-71% extraction in 10 g/L H_2S0_4 with 3 g/L Fe~(3+) in 24 h) and leached almost as well in MSA (45-67% extraction in 20 g/L MSA with 3 g/L Fe~(3+) in 24 h), but glycine, thiourea, and sulfurous acid did not effectively leach conichalcite.
机译：该项目研究了从黄铜矿和方石英这两种高度难熔的铜矿中浸出铜的替代浸出剂。黄铜矿（CuFeS_2）是硫化铜矿物中含量最多的矿物。孔雀石（CaCuAs0_4OH）鲜为人知，但有助于高砷矿床中的超表层铜库存。两者在硫酸中的浸出都不好。测试了硫酸，甘氨酸，甲磺酸（MSA）和硫脲（用于方铁矿浸出试验）作为含黄铜矿和方石英的矿石的助剂，并用硫酸铁或过氧化氢作为氧化剂。通过MSA可以从黄铜矿中提取最高的Cu（在75°C的96 h内30 g / L的MSA与5 g / L Fe〜（3+）的MS回收率达到47％; 30 g / L的铜提取率接近100％在7小时内于75°C下用含3％过氧化氢的L MSA）。甘氨酸在室温下96小时内从黄铜矿中回收了20.7％的铜。所有这些与黄铜矿中硫酸浸出的结果（96小时回收率为1.5％）相比具有优势。孔雀石对硫酸的耐性较低（在24小时内10 g / L H_2S0_4和3 g / L Fe〜（3+）中的萃取率为46-71％），在MSA中也几乎浸出（20 g中的萃取率为45-67％） / L MSA在24小时内含3 g / L Fe〜（3+），但甘氨酸，硫脲和亚硫酸不能有效浸出方石英。

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