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HWAHAK KONGHAK,
Vol.29, No.3, 253-263, 1991
Vol.29, No.3, 253-263, 1991
회중석 정광과 황산암모늄의 반응을 이용한 APT제조
Production of APT from the Scheelite Concentrate by the Decomposition with (NH4)2SO4
회중석 정광(WO3 함량:8.19%)을 황산암모늄으로 분해시켜 수용성으로 만들고 물로 침출하여 APT를 제조하는 새로운 공정을 조사하였다. 회중석 정광을 황산암모늄으로 분해시키는 반응의 적절한 조건은 반응온도 375℃, 회중석 정광 시료(약 6%W)에 대한 황산암모늄의 무게비 6.0, 반응시간 2hr그리고 회중석 정광 시료의 입도-200mesh였으며, 이 조건하에서 얻어진 생성물을 물로 침출한 결과 98.34%의 텅스텐을 침출할 수 있었다. 그리고 이 tungsten 함유 용액의 용매추출과정을 통하여 제조된 APT는 X-선 회절분석 결과 5(NH4)2OㆍWO3ㆍ5H2O임이 확인되었다.
A new process for the production of APT from the scheelite concentrate (WO3:8.19%) by the decomposition of scheelite concentrate with (NH4)2SO4 was attempted. The proper conditions for the decompo-sition of scheelite concentrate were reaction temperature 375℃, weight ratio of (NH4)2SO4 to the scheelite ore 6.0, reaction time 2hr, and particle size of scheelite concentrate -200mesh. Tungsten component of about 98% in the scheelite concentrate was leached out from the decomposed scheelite concentrate by water leaching. APT was produced from the stripped solution through solvent extraction and the APT was identified as 5(NH4)2OㆍWO3ㆍ5H2O by X-ray diffraction analysis.
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