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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。
Adopt the gold chloride solution in kaolin powder to simulate gold ore. After simulating the calcination at different temperatures, cyanide leaching of gold was carried out to investigate the variation of the restraining gold after kaolinite calcination. The relationship between the change of Au leaching rate and the change of the structure of kaolinite minerals was explored by the combination of X-ray diffraction and infrared spectroscopy. The results show that after the kaolinite calcined in the ore at 500 ℃ and higher temperatures, the gold cyanide leaching rate is decreased due to the restraining of the gold due to the binding of kaolinite minerals to the gold. It provides a mineralogical basis for the new technology of roasting and pre-oxidation.