저품위 몰리브텐산화광의 소오다 배소 = Study on the Soda Roasting for Low Grade molybdenum oxides

국문 초록 (Abstract)

輝水鉛鑛과 輝蒼鉛鑛의 混合黃化鑛을 酸化焙燒하여 얻은 燒鑛을 소오다焙燒함에 의해 몰리브덴을 浸出하기 위한 硏究를 하였다. 混合黃化鑛의 酸化焙燒溫度와 酸化焙燒鑛의 소오다焙燒溫度 및 이들이 어떠한 化合物을 이루는가를 알기위하여 熱分析과 X-線回折分析을 한 結果는 다음과 같다.
酸化焙燒鑛의 소오다焙燒溫度範圍는 500∼700℃가 適當하였으며 이들 酸化焙燒鑛은 γ-Bi₂O₃, MoO₃및 Bi₂MoO_6로 存在하였다.
소오다焙燒結果는 苛性소오다가 소오다灰보다 浸出率이 8% 以上 良好하였으며 700℃에서 實收率이 93%에 달했다. 또 浸出殘渣는 γ-Bi₂O₃, Pb₂O₃및 Bi₂MoO_6 등이 濃縮되었다.

다국어 초록 (Multilingual Abstract)

A study on the leaching of the molybdenite from the soda roasted ore obtained by the oxidizing roasting of the mixtures of molybdenite and bismuthinite has been made.
To determine the oxidizing roasting temperature of mixed sulphide ore and the soda roast ing temperature of oxidizing roasted ore, and also to identify those compounds, the differential thermal analysis and X-ray diffraction analysis have been performed. The results obtained are as follows.
The suitable soda roasting temperature of oxidizing roasted ore was in the range from 500℃ to 700℃ and the oxidizing roasted ore has been found to be composed of γ-Bi₂O₃, MoO₃and Bi₂MoO_6. The leaching rate of the soda roasted ore mixed with caustic soda has shown to be greater by more than 8% as comparted to that of the soda roasted ore mixed with the soda ash. The recovery of soda roasted ore mixed with caustic soda has been determined to be 93% at the soda roasting temperature of 700℃. The concentrated leaching residues have been found consisting of γ-Bi₂O₃and Bi₂MoO_6.