| 砷灰的提纯工艺 |
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| 引用本文： | 周新木,岑志军,汪莹,汤昌海.砷灰的提纯工艺[J].南昌大学学报(工科版),2011,33(2):141-144. |
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| 作者姓名： | 周新木 岑志军 汪莹 汤昌海 |
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| 作者单位： | 1. 南昌大学化学系,江西南昌,330031
2. 南昌大学科技学院,江西南昌,330029 |
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| 摘 要： | 采用湿法-火法对粗砷进行提纯,在氨水溶液浸出浓度为5～6 mol/L,液固比为1.7～2.2,浸出温度为50～65℃,浸出时间为3～4 h的工艺条件下,砷的浸出率可达95%以上,浸出液经蒸发结晶得到亚砷酸氢铵,亚砷酸氢铵经烘干后在500℃下分解得白砷产品,纯度可达99.5%以上,浸出剂氨经蒸发得到回收。该工艺无三废排放,原料消耗少,具有较好的经济和环境效益。
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| 关 键 词： | 白砷 浸出 提纯 |
Purification Process of Arsenic Grey |
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| ZHOU Xin-mu,CEN Zhi-jun,WANG Yin,TANG Chang-hai.Purification Process of Arsenic Grey[J].Journal of Nanchang University(Engineering & Technology Edition),2011,33(2):141-144. |
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| Authors: | ZHOU Xin-mu CEN Zhi-jun WANG Yin TANG Chang-hai |
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| Affiliation: | ZHOU Xin-mua,CEN Zhi-juna,WANG Yinb,TANG Chang-haia(a.Department of Chemistry,Nanchang University,Nanchang 330031,China,b.School of Science and Technology,Nanchang 330029,China) |
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| Abstract: | The coarse arsenic was purified by wet and fire method in this paper.Experiment results showed that the leaching rate of arsenic could reach about 95% under the conditions of the concentration of leaching ammonia for 5-6 mol/L,the liquid-solid ratio for 1.7-2.2,temperature of 50-65 ℃ and leaching time for 3-4 h.Ammonium hydrogen arsenite was obtained by evaporative and crystallization of the leaching solution,meanwhile white arsenic was obtained by drying and decomposition in 500 ℃ of ammonium hydrogen arsenite with purity above 99.5%.Ammonia of leaching agent get recycled by evaporation.Clean purification process and lower consumption of raw material produced better economic and environmental benefits. |
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| Keywords: | As2O3 leaching purification |
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