| 湿法炼锌中浸工艺优化试验与生产实践 |
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| 引用本文： | 赵律,朱军,蒋翔,张磊,张庭亮.湿法炼锌中浸工艺优化试验与生产实践[J].有色金属科学与工程,2019,10(6):25-30. |
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| 作者姓名： | 赵律 朱军 蒋翔 张磊 张庭亮 |
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| 作者单位： | 汉中锌业有限责任公司,陕西 汉中,724204;西安建筑科技大学冶金工程学院,西安,710055 |
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| 摘 要： | 锌焙砂中性浸出是湿法炼锌工艺流程的关键环节之一.通过单因素试验和正交试验考察了初始酸度、冲矿温度、浸出时间和焙砂粒度等因素对锌焙砂中浸的影响，试验结果得出较优工艺条件为:初始酸度50 g/L、冲矿温度65 ℃、反应时间60 min、焙砂粒度≤96 μm；4个考察因素均对中浸渣含锌有极显著性影响，影响由大到小为焙砂粒度＞初始酸度＞反应温度＞反应时间.某公司结合试验结果，实施了一系列技术改造:在锌精矿焙烧出料系统增加风选球磨装置，锌焙砂粒度降低至≤120 μm；在中浸双沸腾浸出槽后以串联方式增加2个100 m3搅拌反应罐，同时进行工艺流程再造.经改造前后的生产实践对比，中浸渣锌质量分数从28%~35%降低到22%~25%，中上清液质量持续稳定.
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| 关 键 词： | 锌焙砂 中性浸出 渣锌质量分数 工艺优化 风选球磨 双沸腾冲矿 流程再造 |
| 收稿时间： | 2019-09-19 |
Optimization experiment and production practice of leaching process in zinc hydrometallurgy |
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| Affiliation: | 1.Hanzhong Zinc Industry Co. Ltd., Hanzhong 724200, China2.School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China |
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| Abstract: | Neutral leaching of zinc calcine is one of the key steps in the wet zinc smelting process. In this paper, the effects of initial acidity, smelting temperature, leaching time and grain size of calcine on the neutral leaching of zinc calcining were investigated by single factor experiment and orthogonal test. The results show that the optimum process conditions are: initial acidity of 50 g/L, smelting temperature of 65 ℃, reaction time of 60 min, calcining grain size ≤96 μm; all four factors have a significant effect on the total zinc in the leaching residue, and the influence from big to small are as follow: calcining grain size > initial acidity > reaction temperature >Reaction time. Combined with the results, a series of technical transformations were carried out: adding the winnowing ball milling device in the zinc concentrate roasting and discharging system, reducing the particle size of the zinc calcining to ≤120 μm; two 100 m3 stirred reaction tank were added in series behind the neutral leaching double-boiling leaching tank, and reengineered the process at the same time. By Comparing the production practice before and after the transformation, it was found that the total zinc in the leaching residue decreased from 28%~35% to 22%~25%, and the quality of the supernatant was stable. |
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