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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Development of a novel three-step SX process to recover copper from an acidic solution
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Development of a novel three-step SX process to recover copper from an acidic solution

机译：开发新型三步SX工艺以从酸性溶液中回收铜

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The recommended process enables recovery of copper down to 110 ppm Cu in the raffinate. The value of 150 ppm is recommended for design purposes. To achieve this result, the feed to SX-2 should contain not more than 6.5 git Cu and 10 g/e acid, at pH=1.5-2.0 The raffinate of both the roaster and the Cosac PLS can be extracted down to 6.5 git Cu, using two stages of MS. The acidity of the raffinate is about 50 g/e H_2SO_4. The stripping caused no problems; and two stages will be able to strip all the copper within the range set by the designers. The recommended configuration for the process should be: SX-1 extraction for COSAC and roaster solution: 2 extraction and 2 stripping stages. SX-N for neutralization of the raffinate with Alamine 336:1 extraction and 1 stripping stage. SX-2 for combined roaster and COSAC neutralized raffinate: 2-3 extraction and 2 stripping stages. The stripping stages may be common for both plants. The phase ratio in extraction over the entire plant should be O:W=2.5-3. The stripping can increase the concentration of the Cu in the aqueous electrolyte by 10-20 g/t. The design target of increasing it from 30 to 45 gli Cu, using 2 stages, was proven The feasibility of this configuration for both SX-1 and SX-2 extraction and stripping was proved experimentally in a continuous bench-scale pilot plant at the Chambishi site. Less than 100 ppm of Cu was extracted to the solvent and lost in the strip solution. The recommended method for neutralization of the raffinate is extraction of the acid with Alamine.
机译：推荐的方法可以使萃余液中的铜含量降低到110 ppm。建议将150 ppm的值用于设计目的。为获得此结果，SX-2的进料应在pH = 1.5-2.0时含不超过6.5 git Cu和10 g / e酸。可以将焙烧炉和Cosac PLS的残液提取至6.5 git Cu ，使用两个阶段的MS。提余液的酸度为约50g / e H_2SO_4。剥离没有问题。两个阶段将能够剥离设计者设定范围内的所有铜。该过程的建议配置应为：SAC-1萃取用于COSAC和焙烧溶液：2萃取和2汽提阶段。 SX-N用于通过Alamine 336：1萃取和1汽提阶段中和萃余液。 SX-2适用于焙烧炉和COSAC中和的萃余液：2-3萃取和2汽提阶段。汽提阶段可能对两个工厂都是相同的。整个工厂中萃取的相比应为O：W = 2.5-3。汽提可使含水电解质中的铜浓度增加10-20 g / t。证明了使用2个阶段将其从30 gli铜增加到45 gli Cu的设计目标。在Chambishi的连续台式规模的试验工厂中，实验证明了这种配置用于SX-1和SX-2提取和汽提的可行性。现场。少于100 ppm的Cu提取到溶剂中，并在汽提溶液中损失。推荐的提余液中和方法是用Alamine萃取酸。

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