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我国储量丰富的铝土矿资源其主要特点是高硅、高钛低铁的一水硬铝石型 ,用于生产氧化铝的条件十分苛刻 ,工艺流程长 ,能耗高。在大型预焙铝电解槽上添加硅、钛、氧化铝直接电解生产Al-Si-Ti合金新工艺 ,能缩短工艺流程 ,减少投资 ,降低能耗和成本。首次在 14 0kA大型预焙铝电解槽直接生产Al-Si-Ti的工业试验 ,使得该工艺在原来只在中小型自焙槽上实施的基础上有了重大突破。试验期间其平均电流效率为同比铝电解槽电流效率的 90 2 % ,为我国铝土矿提供了冶炼优质合金材料的新途径。实现了铝土矿的综合利用 ,具有明显的经济效益和社会效益。直接电解所得铝硅钛合金作为中间合金 ,根据需要配制成各种含钛铸造合金 ,广泛应用于汽车、摩托车工业 ,内燃机活塞、机械制造、高压电器等行业 ,大量工业试验证明在强度、热稳定性、耐磨损性能方面与传统的熔配法合金相比有着显著的优越性 ,应用前景广阔
The main feature of China’s abundant bauxite resources is the diaspore type of high-silicon and high-titanium low-iron. The conditions for the production of alumina are very harsh, the process flow is long and the energy consumption is high. The addition of silicon, titanium and alumina to the large prebaked aluminum electrolysis cell to produce the new Al-Si-Ti alloy by direct electrolysis can shorten the technological process, reduce the investment, reduce the energy consumption and the cost. The first industrial trial of Al-Si-Ti for the first time in a large prebake aluminum cell at 140 kA resulted in a major breakthrough in the original implementation of the process on small and medium-sized self-baking troughs. During the test, the average current efficiency was 90 2% of the current efficiency of the aluminum cell at the same period of the previous year, which provided a new way for smelting high-quality alloy materials in China. Achieve the comprehensive utilization of bauxite, with obvious economic and social benefits. Directly obtained by electrolysis of Al-Si-Ti alloy as the master alloy, according to the need to be prepared into a variety of titanium-containing cast alloys, widely used in automotive, motorcycle industry, internal combustion engine piston, machinery manufacturing, high voltage electrical and other industries, a large number of industrial tests prove that the strength, Stability and wear resistance compared with the traditional melting method alloy has significant advantages, broad application prospects