摘要
采用在高岭石粉末内加入氯化金水溶液模拟金矿石。由模拟样经不同温度焙烧后再氰化浸金， 探讨高岭石经焙烧后束缚金的变化规律。由焙砂的Ｘ射线衍射和红外光谱相结合探索Ａｕ 浸出率变化与高岭石矿物结构变化关系。研究结果表明，矿石内高岭石经５００℃和更高温度焙烧后， 由于高岭石矿物结构破坏产物对金的束缚而改变金的赋存状态，使金的氰化浸出率降低。为焙烧预氧化新工艺研究提供了矿物学依据。
Used the mixture of powered kaolinite and water solution of gold chloride to simulate gold ore. After roasted at various temperatures, the simulation samples were immersed in sodium cyanide for gold extraction. Based on this, the variation law of the bound gold in roasted kaolinite is discussed. Combining X ray diffraction of the roasted kaolinite with the infrared spectroscopic analysis, the relation between the variation of Au leaching rate and the variation of mineral texture of kaolinite is explored. The research conclusion indicates that roasted at 500℃ and even higher temperatures, the mineral texture of the kaolinite in the ore has been destroyed, which binds the gold, changes the occurrence of the gold and makes the leaching rate of gold reduce. This study provides mineralogical basis for the new technology of roasting preoxidation.
出处
《黄金地质》
1999年第4期1-6,共6页
Gold Geology
基金
国家自然科学基金!资助项目(编号59564001)
