발간논문

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Vol.3, No.1, 1 ~ 11, 1965
Title
A Study on the Pyrometallurgical Processing of Marmatite
고창식 , 이정용 Chang Shik Koh , J . Y . Lee
Abstract
In order to find out an optimum condition for the extraction of zinc from domestic marmatite, a series of pyrometallurgical tests were carried out using flue-solid roaster and horizontal distillation apparatus. It was confirmed that the roasted marmatite was magnetized at above 950℃ and the intensity of magnetism was increased during air colling after roasting. The normal reduction temperature was found 950℃∼1000℃ for the marmatite calcine which is approximatly 100℃ higher than that of zinc blende calcine. In this experiment, the reduction equation of marmatite calcine by solid carbon at the range from 950℃ to 1370℃ is assumed as follows; ZnO·Fe₂O₃＋2C = Zn＋2FeO＋2CO Carbon was sufficient with about two or three times of theoretical amount. Degree of reduction was 95% at 1300℃ after 10∼24 hrs treatment, and the purity of condensed zinc was 99%. It was also found the CaO is effective to increase the degree of reduction, ultimately up to 100%.
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