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    Recovery of copper values from iron-containing ore materials as mined and smelted
    81.
    发明授权
    Recovery of copper values from iron-containing ore materials as mined and smelted 失效
    从含铁矿石材料回收铜价，开采和冶炼

    公开(公告)号：US4152142A

    公开(公告)日：1979-05-01

    申请号：US903782

    申请日：1978-05-08

    申请人： William J. Schlitt, III ,  Samuel M. Polinsky

    发明人： William J. Schlitt, III ,  Samuel M. Polinsky

    IPC分类号： C22B15/00 ,  C25C1/12

    CPC分类号： C22B15/0071 ,  C22B15/0091 ,  Y02P10/236

    摘要： A process for improving overall recovery of copper from an integrated mining and metallurgical processing operation by utilizing iron-containing copper ore materials as mined, such as low-grade copper ores and mine wastes, and crushed or granulated copper-containing slag obtained by smelting the higher-grade portions of such ore materials, involves the minign of such ore materials, the smelting of higher grade portions thereof, and the leaching of copper values from lower grade portions thereof with an aqueous, weakly acidic lixiviant to produce an acidic, ferric, effluent solution. The smelter slag is leached with the such effluent solution and copper values are recovered from the resulting pregnant solution. If desired, the barren solution may be recycled to the initial ore leaching step. By maintaining the pH of the acidic, ferric effluent solution from the initial leach within its normal range of about 1.9 to 3.0 for the slag leaching step, copper is selectively leached from the smelting slag while avoiding the usual precipitation of ferric salts and the formation of gelatinous slag decrepitation products. Moreover, ferric ion values in the acidic, ferric effluent solution from the initial leach are significantly reduced during laching of the smelter slag, thereby significantly increasing the efficiency of copper recovery in a subsequent step of either cementation of copper on metallic iron or electro-winning of copper.

    摘要翻译： 通过采用低品位铜矿石和矿山废弃物等开采的含铁铜矿材料，通过冶炼所得的粉碎或粒状含铜矿渣，提高综合采矿冶金加工作业铜的综合回收率 这种矿石材料的高级部分涉及这种矿石材料的最小化，其较高级别的部分的熔炼，以及用较低级别的部分用弱酸性浸出剂浸出铜值以产生酸性，铁质， 流出液。 用这种流出液浸出冶炼炉渣，从所得到的怀孕溶液中回收铜值。 如果需要，贫化溶液可以再循环到初始矿石浸出步骤。 通过将酸性，三价铁排出液的pH值从初始浸出液的熔渣浸出步骤的约1.9至3.0的正常范围内保持，选择性地从熔炼渣中浸出铜，同时避免了铁盐的通常沉淀，并形成 凝胶状矿渣爆裂产品。 此外，在冶炼炉渣的浸出期间，来自初始浸出的酸性，三价铁排出物溶液中的铁离子值显着降低，从而显着提高铜在金属铁上的电渗或电取质的后续步骤中的铜回收效率 的铜。

    Precipitation of selenium from copper electrowinning solutions
    85.
    发明授权
    Precipitation of selenium from copper electrowinning solutions 失效
    从铜电解液中析出硒

    公开(公告)号：US4026797A

    公开(公告)日：1977-05-31

    申请号：US678047

    申请日：1976-04-19

    申请人： Cvetko B. Nikolic ,  John M. Laferty

    发明人： Cvetko B. Nikolic ,  John M. Laferty

    IPC分类号： C22B15/00 ,  C25C1/12 ,  C02C5/02

    CPC分类号： C22B15/0091 ,  C22B15/0089 ,  C25C1/12 ,  Y02P10/236

    摘要： Selenium is removed from copper electrolytes by adding a substance selected from the group consisting of metals above copper in the electromotive series, excluding alkali metals, such as nickel powder, cobalt powder and iron powder. Sodium sulfide can also be used along with a subsequent addition of ferric sulfate. The amount of the reactive substance added should be sufficient to reduce the selenium content to below 2 ppm.

    摘要翻译： 通过在电动系列中添加选自铜以外的金属的物质，除了镍粉末，钴粉末和铁粉等碱金属以外，从铜电解质中除去硒。 硫酸钠也可以随后加入硫酸铁一起使用。 反应物质的添加量应足以将硒含量降低到2ppm以下。