| 锌粉置换镓锗渣加压氧化浸出的生产实践 |
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| 引用本文： | 张伟,宫晓丹,周科华,吴才贵,张登凯,陈龙义,邓孟俐. 锌粉置换镓锗渣加压氧化浸出的生产实践[J]. 有色金属科学与工程, 2020, 11(5): 142-147. DOI: 10.13264/j.cnki.ysjskx.2020.05.020 |
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| 作者姓名： | 张伟 宫晓丹 周科华 吴才贵 张登凯 陈龙义 邓孟俐 |
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| 作者单位： | 1.深圳市中金岭南有色金属股份有限公司丹霞冶炼厂，广东 韶关 512325 |
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| 基金项目： | 国家重点研发计划;国家科技支撑计划 |
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| 摘 要： | 介绍了丹霞冶炼厂综合回收锌粉置换镓锗渣浸出镓锗铜有价金属的生产实际情况，浸出流程设计采用原料氧化烘焙预处理与二段逆流加压氧化浸出加一段常规浸出，以及独立的混酸浸出工艺，镓、锗、铜浸出率分别为94%、94%和95%。在2017年试生产期间镓、锗、铜金属浸出率分别为94.06%、59.37%和98.90%，通过对锌粉置换镓锗渣成分和浸出机理的分析，基于最小化学反应量原理优化改进原有流程，取消氧化烘焙预处理操作单元，强化二段加压氧化反应条件，抑制溶液硅凝胶生成，锗的年平均浸出率由2017年59.37%提高至2019年的75.35%，镓、铜金属浸出率分别升高了0.75%和0.12%，优化后生产费用年节约355万元，流程更精简，生产现场更安全环保。
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| 关 键 词： | 加压 浸出 镓锗 锌粉 置换渣 氧化 |
| 收稿时间： | 2020-05-21 |
Production practice of zinc powder replacement Ga and Ge slag by pressure oxidation leaching |
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| Affiliation: | 1.Danxia Smelter of Shenzhen Zhongjin Lingnan Non-ferrous Metal Co., Ltd., Shaoguan 512325, Guangdong, China2.CINF Engineering Co., Ltd., Changsha 410019, China |
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| Abstract: | The paper introduces production practice of gallium, germanium and copper leaching from zinc powder replacement residue for comprehensive recovery of valuable metals in Danxia Smelter. The leaching process was designed with pretreatment of replacement residue with oxidation roasting, two stage countercurrent oxygen pressure leaching, single stage conventional leaching and separate mixed acid leaching. The design of leaching rates of gallium, germanium and copper were 94%, 94% and 95%, respectively. During trial production in 2017, their leaching rates were 94.06%, 59.37% and 98.90%, respectively. After analyzing the composition and leaching mechanism of replacement residue, the design process was optimized and improved based on the principle of minimum chemical reactivity by cancelling oxidation roasting, strengthening the second oxygen pressure reaction condition and inhibiting the formation of silica gel in solution. The annual average leaching rate of germanium increased from 59.37% in 2017 to 75.35% in 2019 and the leaching rates of gallium and copper increased by 0.75% and 0.12% respectively. After optimization, it was expected to save 3.55 million yuan in production costs in a year, with the process streamlined, and the production site safer and greener. |
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