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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 11, Number 3
JKCSEZ 11(3)
June 20, 1967 

Direct Acid Leaching of Zinc from Marmatite Ores (1) Autoclave Treatment of Domestic Marmatite Ores with Sulfuric Acid Oxygen

액체 구조의 천이상태이론의 질소산화물들에 대한 적용
Kim Jae Won

김상형, 박형석, 김각중, 장세헌
액체구조의 천이상태이론을 아산화질소(N2O)와 사산화질소(N2O4)에 적용하여 이 액체들의 상태합을 유도하였다. 이상태합들을 써서 각 액체의 몰부피, 증기압, 증발엔트로피, 임계점에서의 성질 등, 여러가지 열역학적양들을 계산한 결과 모두 실험치와 좋은 일치를 얻었다.

The direct acid leaching of domestic Marmatite concentrate at elevated temperatures and pressures was investigated. Almost 100 percent of zinc was extracted from the concentrate liberating free sulfur in 4 hours at 100℃ when the oxygen partial pressure was 5 atm. in sulfuric acid solution. By applying the Arrhenius equation to leach reaction in the range of 60° to 100℃ at the same oxygen partial pressure, 15.7 kcal per mole of activation energy was calculated. At the initial stage of leaching, the rate of reaction increased linearly by increasing temperature and pressure. The concentration of sulfuric acid gave minor effect to leaching velocity in the range of 5 to 20 percent. The particle size should be under 270 mesh for 100 percent extraction of zinc.

105 - 110
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