Kinetics of nickel and cobalt leaching from waste superalloys with sulfuric acid

被引：0

作者：

Xing, Weidong ^{[1
]}

Fan, Xingxiang ^{[1
,2
,3
]}

Dong, Haigang ^{[1
,2
,3
]}

Wu, Yuedong ^{[1
]}

Fu, Guangqiang ^{[1
]}

Liu, Yang ^{[1
]}

机构：

[1] Kunming Institute of Precious Metals, Kunming

[2] Sino-Platinum Metals Co., Ltd, Kunming

[3] State Key Laboratory of Advanced Technology of Comprehensive Utilization of Platinum Metals, Kunming

来源：

Xiyou Jinshu/Chinese Journal of Rare Metals | 2014年 / 38卷 / 04期

关键词：

Kinetics; Physical chemistry; Sulfuric acid leaching; Superalloys;

D O I：

10.13373/j.cnki.cjrm.2014.04.021

中图分类号：

学科分类号：

摘要：

The kinetics behavior of nickel and cobalt leaching from waste superalloys with sulfuric acid was investigated. The kinetics experiments were carried out with the ratio of liquid to solid of 400:1, the acid concentration of from 10% to 25%(volume fraction) and the temperature of from 55 to 75℃. The results showed that the apparent activation energy of nickel and cobalt was 13.37 and 21.59 kJ·mol-1, respectively. This indicated that the dissolution kinetics followed a shrinking core model with inter-diffusion of nickel, cobalt and sulfate ions through the porous region of alloying layer in the rate determining step. The kinetics study of leaching Ni and Co from waste superalloys with sulfuric acid provided some reference for the recycle of waste superalloy in industry practice.

引用

页码：674 / 679

页数：5

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