Articles & Issues
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.
All issues
염화철 용액에서 니켈 Matte의 용해
Dissolution of Nickel Matte in Acidic Ferric Chloride Solution
HWAHAK KONGHAK, February 1988, 26(1), 104-112(9), NONE
Download PDF
Abstract
주성분이 heazlewoodite와 ferronickel로 구성된 니켈 matte로부터 니켈의 용해를 지배하는 메카니즘을 규명하기 위해서, HCl, FeCl3 및 FeCl2의 혼합용액에서 침출실험을 수행하였다.
Ferronickel은 반응시작 불과 30분 이내에 거의 완전히 용해되어 Fe3+ 이온에 대해서 큰 반응성을 나타내고 Fe3+ 이온농도에 비례하는 경향을 보여주었지만, 활성화에너지값은 약 4.2 kcal/g mol로써 온도에 대한 의존성이 낮았다. H+와 Fe2+ 이온은 니켈 matte의 용해반응에 거의 참여하지 않고, 이들의 농도도 용해속도와는 무관하였으며, 침출된 입자에 축적된 유리황 층도 반응물과 생성물의 고체 내부에 대한 확산저항 역할을 하지 않았다. Heazlewoodite의 용해속도는 Fe3+ 이온농도와 무관하였으며, 고체 입자에는 중간체인 millerite의 생성없이 heazlewoodite와 동일한 결정구조를 가진 Ni3-xS2의 형태와 황이 생성되었고, 반응이 진행됨에 따라 x값이 점점 증가하였다.
Ferronickel은 반응시작 불과 30분 이내에 거의 완전히 용해되어 Fe3+ 이온에 대해서 큰 반응성을 나타내고 Fe3+ 이온농도에 비례하는 경향을 보여주었지만, 활성화에너지값은 약 4.2 kcal/g mol로써 온도에 대한 의존성이 낮았다. H+와 Fe2+ 이온은 니켈 matte의 용해반응에 거의 참여하지 않고, 이들의 농도도 용해속도와는 무관하였으며, 침출된 입자에 축적된 유리황 층도 반응물과 생성물의 고체 내부에 대한 확산저항 역할을 하지 않았다. Heazlewoodite의 용해속도는 Fe3+ 이온농도와 무관하였으며, 고체 입자에는 중간체인 millerite의 생성없이 heazlewoodite와 동일한 결정구조를 가진 Ni3-xS2의 형태와 황이 생성되었고, 반응이 진행됨에 따라 x값이 점점 증가하였다.
In order to investigate the mechanism which govern the dissolution of nickel from a matte composed essentially of heazlewoodite and ferronickel, the leaching was carried out in a mixture of HCl, FeC13, and FeC12.
In about 30 minutes of reaction, ferronickel was almost completely dissolved, and showed a high reactivity to Fe3+, with a tendency proportional to the Fe3+ ion concentration. The activation energy was about 4.2 kcal/g mole and indicated a low temperature dependence. H+ and Fe2+ ions were not directly involved in the reaction of nickel matte, and the concentrations of these ions did not exert any significant influence on the dissolution rate. The sulfur layer deposited on the leached particle did not give any internal diffusional resistance for both reactant and product. The rate of dissolution for heazlewoodite was independent of Fe3+ ion concentration. The sulfur and the Ni3-xS2 having identical crystalline structure with heazlewoodite were formed on the particle, and the value of x was inceased as the reaction proceeded. However, the formation of millerite, an intermediate, was not observed.
In about 30 minutes of reaction, ferronickel was almost completely dissolved, and showed a high reactivity to Fe3+, with a tendency proportional to the Fe3+ ion concentration. The activation energy was about 4.2 kcal/g mole and indicated a low temperature dependence. H+ and Fe2+ ions were not directly involved in the reaction of nickel matte, and the concentrations of these ions did not exert any significant influence on the dissolution rate. The sulfur layer deposited on the leached particle did not give any internal diffusional resistance for both reactant and product. The rate of dissolution for heazlewoodite was independent of Fe3+ ion concentration. The sulfur and the Ni3-xS2 having identical crystalline structure with heazlewoodite were formed on the particle, and the value of x was inceased as the reaction proceeded. However, the formation of millerite, an intermediate, was not observed.
