【摘要】 力化学方法处理铝土矿，可明显改善其溶出性能．对国内２种有代表性的铝土矿：广西平果矿和山西普铝矿采用该法处理，使矿石中的一水硬铝石结构发生变化，从而降低了溶出温度及溶出用碱液浓度，并提高了溶出速率．对力化学引起的反应性能变化及其内在原因进行了探讨．据此确认该法对我国氧化铝工业节能降耗、提高经济效益具有实际意义．更多还原

【Abstract】 The mechanochemistry effects on the process of diaspore type bauxite in sodium aluminate solution was investigated. The results show some surprising effects. For example, the solution ratio of Al 2O 3 in activated ores is twice as high as that in non activated ores with high alumina silica ratio at 210 ℃ and is higher than the equilibrium value, the reaction rate constant rises by 27% and the optimal reaction temperature for digestion and the optimal concentration of sodium solution can be lower. It has been proved that the mechanochemistry method can selectively disilicate SiO 2 from bauxite with highly concentrated silica and raise alumina silica ratio from 4.8 up to 15～30 to obtain ores that can be digested with Bayer process.更多还原