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| Study on Existence Speciation and Distribution Characteristics of Arsenic and Mercury in Tin Smelting Dust |
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Received:April 23, 2019
Revised:April 24, 2019
Accepted:April 28, 2019
Published Online:September 23, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.10.005 |
| KeyWord:tin smelting dust; arsenic; mercury; existence speciation; distribution characteristics |
| Author | Institution |
| Wang Li |
云南环境工程设计研究中心 |
| Wang Miao |
云南环境工程设计研究中心 |
| Xie Rongsheng |
昆明冶金研究院 |
| He Shujuan |
云南环境工程设计研究中心 |
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| Abstract: |
| Existence speciation and distribution characteristics of arsenic and mercury in typical tin smelting dust were studied. The results show that heavy metal pollutants in dust discharged by tin smelting enterprises mainly include arsenic, mercury, cadmium and tin, among which arsenic dust is the main element in rotary kiln and tin dust is the main one in fuming furnace. Arsenic content of rotary kiln dust is as high as 48.00% and mercury content is 0.005%, arsenic content of electric furnace dust is only 1.15% and mercury content is 0.0064%. Dust in rotary kiln is in form of coarse particle with +10 μm accounting for 34.83%. Particle size of fuming furnace dust is smaller with -3 μm accounting for 65.18%. Smoke dust in electric furnace mainly distributes in the range of small particle size with -1 μm accounting for 41.72%. Arsenic speciation in tin smelting dust is mainly As(Ⅲ), and mercury content is low and mainly exist in form of elemental mercury and mercuric oxide. |
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