本文已被：浏览 2923次 下载 2993次
投稿时间：2013-07-09 修订日期：2013-07-11 录用日期：2013-07-12 网络发布日期：2013-12-23
投稿时间：2013-07-09 修订日期：2013-07-11 录用日期：2013-07-12 网络发布日期：2013-12-23
中文摘要: 用水热法浸取炼锑砷碱渣，以硫化钠为沉淀剂进行硫化脱砷过程动力学试验。考察在不同温度和硫化钠用量时沉淀时间与沉淀净化效果的关系，并建立动力学模型。结果表明，反应温度、硫化钠浓度对沉砷净化过程都有一定的影响，其中反应温度对净化率影响的敏感度较低；沉砷净化动力学模型符合n=0.426 1时的Avrami方程：-ln(1-x)=1057.33CA-0.4963t0.4261exp(-1.591?104/RT)；表观活化能为15.91 kJ/mol，反应级数为-0.496 3，脱砷过程反应较快，属扩散控制。
Abstract:Arsenic-alkali residue was hydrothermally leached with sodium sulfide as precipitating agent. The kinetics of sulfide precipitation of arsenic removal was studied. The relationship between precipitation duration and purification rate were investigated under different temperature and dosage of sodium sulphide. Dynamic model was established. The results show that both reaction temperature and concentration of sodium sulfide have certain effect on arsenic purification process while the effect of reaction temperature on purification rate is less sensitive effect. Arsenic precipitation purification dynamics model fits for Avrami equation model with n=0.4261: -ln(1-x)=1057.33CA-0.4963t0.4261exp(-1.591×104/RT). Its apparent activation energy is 15.91 kJ/mol and reaction order is -0.496 3. The arsenic removal process is faster in reaction with diffusion controlled.
keywords: arsenic-alkali residue sulfide precipitation hydrothermal leaching kinetics purification rate
文章编号： 中图分类号： 文献标志码：
基金项目:广西教育厅科研项目(201010LX486)
| 作者 | 单位 | |
| 韦岩松* | 河池学院 广西宜州 546300 | weiyans@126.com |
| 邓晓雯 | 河池学院 广西宜州 546300 |
| Author Name | Affiliation | |
| WEI Yan-song | Hechi University | weiyans@126.com |
| DENG Xiao-wen |
引用文本：
韦岩松,邓晓雯.锑冶炼砷碱渣水热硫化沉淀脱砷过程动力学[J].有色金属（冶炼部分）,2014(1):8-11.
WEI Yan-song,DENG Xiao-wen.Arsenic Removal Kinetics of Hydrothermal Sulfide Precipitation for Arsenic-alkali Residue from Antimony Smelting[J].Nonferrous Metals (Extractive Metallurgy),2014(1):8-11.
韦岩松,邓晓雯.锑冶炼砷碱渣水热硫化沉淀脱砷过程动力学[J].有色金属（冶炼部分）,2014(1):8-11.
WEI Yan-song,DENG Xiao-wen.Arsenic Removal Kinetics of Hydrothermal Sulfide Precipitation for Arsenic-alkali Residue from Antimony Smelting[J].Nonferrous Metals (Extractive Metallurgy),2014(1):8-11.
关注微信公众号