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投稿时间:2018-06-29 修订日期:2019-04-22
投稿时间:2018-06-29 修订日期:2019-04-22
中文摘要: 为了实现高效率、低成本地分离黑铜泥中的砷,本文以双氧水和空气作为氧化剂,采用单因素试验方法研究了常压下双氧水及NaOH浓度和加入方式、浸出温度、液固比、反应时间等对双氧水氧化碱浸黑铜泥脱砷的影响。实验结果表明:氧化碱浸黑铜泥的反应过程由外扩散、内扩散和界面化学反应3个步骤混合控制,其最佳的反应温度为80℃,液固比为10:1(mL/g),反应时间为6 h,在此过程中,需要以0.1 MPa压力连续鼓气,30%的双氧水及NaOH要平均分成两份在反应刚开始和反应进行3 h后加入,并且双氧水以滴加方式加入,其总量为依次为90 mL/L和3.36 mol/L,在此最佳条件下,砷的浸出率分为98.2%,铜、锑和铋几乎未被浸出。氧化碱浸后渣铜以铜粉的形式存在,其相对含量达到80%,有利于后续处理。。
中文关键词: 黑铜泥,碱浸,脱砷,H2O2
Abstract:In order to achieve high efficiency and low cost separation of arsenic from black copper mud, H2O2 and air are used as oxidants, the effect of H2O2 and NaOH concentration and addition mode, leaching temperature, liquid - solid ratio and reaction time on the dearsenation of black copper mud from alkaline leaching of H2O2 under atmospheric pressure was studied by single factor test. The experimental results show that the reaction process of oxidation alkaline leaching of black copper mud is controlled by 3 steps: external diffusion, internal diffusion and interfacial chemical reaction, and the suitable reaction conditions are as follows:the reaction temperature is 80 ℃, the ratio of liquid to solid is 10:1 (mL/g), and the reaction time was 6 h. In the meantime, Continuously through the air with 0.1 MPa pressure. 30% of H2O2 and NaOH should be divided into two equal parts, adding at the beginning of the reaction and 3 h after the reaction, and the addition of H2O2 in drops is 90 mL/L and 3.36 mol/L in sequence. Under this suitable condition,the leaching rate of arsenic is divided into 98.2%, but Copper, antimony and bismuth are almost not leached. After oxidation and alkali leaching, slag copper exists in the form of copper powder, and its relative content reaches 80%, which is favorable for subsequent treatment.
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作者 | 单位 | |
姚夏妍* | 西北矿冶研究院 | 1141557523@qq.com |
Author Name | Affiliation | |
yaoxiayan | ( Northwest Research Institute of Mining and Metallurgy | 1141557523@qq.com |
引用文本:
姚夏妍.氧化碱浸分离黑铜泥中砷的研究[J].有色金属工程,2019,9(6):.
姚夏妍.氧化碱浸分离黑铜泥中砷的研究[J].有色金属工程,2019,9(6):.