真空碳热还原氯化法炼铝原理分析（Analysis of chlorination aluminum vacuum carbothermal reduction principle）.docVIP

真空碳热还原氯化法炼铝原理分析（Analysis of chlorination aluminum vacuum carbothermal reduction principle） Analysis of chlorination aluminum vacuum carbothermal reduction principle Abstract: Aluminum in bauxite exists in the form of alumina. Because of the direct reduction of the metal aluminum and other impurities can not be separated, and can not be reduced directly by reducing agents. The principle of direct smelting aluminium from bauxite by carbothermal reduction and low chloride decomposition in vacuum was studied. Keywords: aluminium smelting, vacuum technology, carbothermal reduction Introduction Aluminium is a kind of light metal, and it has abundant reserves in nature. The density of 1/3 steel, high strength / weight ratio and good electrical conductivity, thermal conductivity, aluminum surface is a layer of protecting film without rust, and the aluminum recycling rate is high, so the aluminum is widely used in automobile manufacturing industry, construction industry and aerospace industry, is a an important economic and strategic metal. Therefore, some countries lacking bauxite resources are studying the methods of producing alumina by using these raw materials, among which acid, high-pressure water chemistry and Limestone Sintering are the most studied methods. But many methods of alunite comprehensive treatment has been used only in roasting reduction method of industrial production, in addition to comprehensive treatment of sintering nepheline there has been a large-scale industrial production. Based on the analysis of the basic principle of several common methods on vacuum carbothermic reduction chlorination aluminum. 1 common aluminum smelting methods 1.1 acid process The common characteristic of non bauxite raw materials is that they contain very high silica. The treatment of these materials by acid method is reasonable in principle. According to the type of inorganic acid with different alumina production by acid have different solutions, but they have a common ch