【摘要】 为提高真空炉渣中锗的浸出率提供理论依据,对含锗真空炉渣在HCl-CaCl2-H2O体系中锗的浸出动力学进行了研究。结果表明,浸出过程属于生成固体产物层的"未反应核收缩模型",其宏观动力学方程为:1–2/3x–(1–x)2/3=4.66×10-3CHCl1.027CCaCl21.046d-0.862exp(–21068/RT)t,表观活化能为21.068kJ/mol,浸出过程受灰分层扩散控制;提高盐酸的浓度、氯化钙浓度、浸出温度、液固比及减小矿物粒度均可加快锗的浸出速度,提高锗的浸出率。更多还原

【Abstract】 In order to provide a theoretical basis to improve the leaching rate of germanium in vacuum slag, the leaching kinetics of germanium in vacuum slag was investigated in hydrochloric acid-calcium chloride solution. The results show that the leaching process fits the generation of solid products of unreacted-core shrinking model. The kinetics equation is 1-2/3x-(1-x) 2/3 =4.66×10 -3 CHCl1.027CCaCl2 1.046 d-0.862 exp(-21068/RT)t. The leaching process is controlled by the diffusion of the lixiviant and the activation energy is determined to be 21.068 kJ/mol. The leaching speed and the leaching rate of germanium are increased by increasing the hydrochloric acid concentration, the calcium chloride concentration, the leaching temperature and the liquid-solid ratio and decreasing the particle size of the sample.更多还原