Recovery of Barium Ions from a Barium Residue in Guizhou by Hydrochloric Acid Leaching
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摘要:
大量钡渣堆积会对环境造成极大的危害。对钡渣采用盐酸浸出，能有效回收钡渣中剩余可溶性钡盐，还能大大减少钡渣对环境的危害，是一种较好的利用钡渣的方法。本文通过实验，得出了较好的钡渣盐酸浸出条件，在钡渣磨矿细度为-0.074 mm 80%，盐酸浓度为3 mol/L，浸出固液比为1∶7，浸出时间为2 h，浸出温度为40 ℃，浸出搅拌速度480 r/min时，得到了较佳的钡离子浸出率，钡离子总浸出率达到了38.88%，仅考虑可溶性钡盐时，钡离子浸出率达到90.30%。
Abstract:A large amount of barium slag accumulation will cause great harm to the environment. The use of hydrochloric acid leaching for barium residue can effectively recover the residual soluble barium salt in the barium residue and greatly reduce the harm of the barium residue to the environment. It is a better method to utilize the barium residue. Through experiment, this paper obtained the better barium slag hydrochloric acid leaching conditions, the barium slag grinding fineness is 0.074 mm accounted for 80%, hydrochloric acid concentration is 3 mol/L, leaching solid-liquid ratio is 1∶7, leaching time is 2 h, leaching temperature of 40 ℃, leaching mixing speed is 480 r/min, obtained the best barium ion leaching rate, barium ion leaching rate reached 38.88%. When only soluble barium salt is considered, the leaching rate of barium ion reaches 90.30%.
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Key words:
- Barium residue /
- Leaching /
- Barium ion /
- Barite /
- Leaching rate
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表 1 钡渣样多元素分析结果/%
Table 1. Chemical compositions of samples
BaO SiO2 CaO Fe2O3 Al2O3 MgO 30.23 14.80 9.04 9.00 4.87 2.86 
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