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摘要:
对水浸过程中影响BaS溶出的可能反应进行热力学分析，考察了浸取温度、浸取时间、液固比对水溶性钡存在形式的影响。结果表明：增加液固比、浸取温度可有效提高BaS的浸取率；浸取过程中部分溶出的钡会生成水不溶性钡，水不溶性钡总生成率随着浸取温度、时间的增加而增加，随着液固比的增加而降低水。当浸取温度为55 ℃、浸取时间为60 min、液固比为60时，BaS的浸取率为90.13 %，BaS的残留率为4.27%，BaSiO3的生成率为3.14%，BaCO3的生成率为1.24%，在该工艺条件下BaS有较高的浸取率、较低的残留率及较低的水不溶性钡生成率。
Abstract:Thermodynamic analysis of reactions affecting the dissolution of BaS during water leaching, and the effects of leaching temperature, leaching time, and liquid-solid ratio on the presence of water-soluble barium were investigated. The results show that increasing the liquid-solid ratio and leaching temperature can effectively increase the leaching rate of BaS. Part of the dissolved barium will generate water-insoluble barium, and the total formation rate of water-insoluble barium increases with the increase of the leach temperature and time, and decreases with the increase of the liquid-solid ratio.When the leaching temperature is 55 ℃, the leaching time is 60 min, and the liquid-solid ratio is 60, the leaching rate of BaS was 90.13%, the residual rate of BaS was 4.27%, formation rate of BaSiO3 was 3.14%, formation rate of BaCO3 was 3.14%, BaS has higher leaching rate, lower residual rate and lower water-insoluble helium formation rate under the process conditions.
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Key words:
- barium sulfide /
- water leaching /
- thermodynamics /
- leaching rate /
- barite
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表 1 重晶石熟料的成分分析结果 /%
Table 1. Chemical composition analysis of barite black ash
成分 BaS BaSO4 BaSiO3 BaCO3 SiO2 含量 71.84 6.43 2.12 3.85 12.67 
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表 2 影响BaS溶出的系列反应
Table 2. Series of reactions affecting the dissolution of BaS
序号 化学反应 R1 BaS= Ba2++S2- R2 S2-+H2O=HS-+OH- R3 Ba(OH)2=Ba2++2OH- R4 Ba2++2OH-+SiO2=BaSiO3+H2O R5 Ba2++2OH-+CO2=BaCO3+H2O
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