CAJ | 학술논문

采用氨浸法回收含砷石灰铁盐渣中锌,研究了不同浸取剂、浸取剂的组成、总氨浓度、氨水与铵盐配比、液固比等工艺条件对锌浸出效果的影响,分析了锌的浸出动力学.结果表明：以氨水和碳酸铵组成的浸取体系为浸取剂,当总氨浓度为5 mol/L,氨-铵盐摩尔浓度比为2∶3,液固比为4∶1时,锌的浸出率为56.21%.由宏观模型得出锌的浸出在温度为288～323 K内遵循＂未反应核缩减＂模型,受内扩散控制,浸出动力学方程为：1-2α3-（1-α）2/3=232×exp（-32245/RT）t,浸出表观活化能为32.24 kJ/mol.
채용안침법회수함신석회철염사중자,연구료불동침취제、침취제적조성、총안농도、안수여안염배비、액고비등공예조건대자침출효과적영향,분석료자적침출동역학.결과표명：이안수화탄산안조성적침취체계위침취제,당총안농도위5 mol/L,안-안염마이농도비위2∶3,액고비위4∶1시,자적침출솔위56.21%.유굉관모형득출자적침출재온도위288～323 K내준순＂미반응핵축감＂모형,수내확산공제,침출동역학방정위：1-2α3-（1-α）2/3=232×exp（-32245/RT）t,침출표관활화능위32.24 kJ/mol.
Zinc from solid waste containing arsenic was recovered by ammonia leaching method. The effects of different leachant, leachant composition, total ammonia concentration, molar concentration ratio of NH3 to NH4+ , liquid-solid ratio on zinc leaching were investigated and its kinetics of was also analyzed. The results indicated that 56.21% of zinc was recovered when c(ammonia) = 5 mol/L, c ( NH3 ) : c ( NH4+ ) = 2: 3, L/S ratio = 4: 1. And the leaching process by macro model followed the shrinking-core model at the temperature ranging from 288 K to 328 K, which was controlled by the inner ~ - 32245, diffusion of reactants. The leaching kinetics equation was established as 1-2α3-(1-α)2/3=232×exp(-32245/RT)t, and the apparent activation energy is 32.24 kJ/mol.