Consider using overseas minerals.

Most foreign countries are gibbsite bauxite, which has the characteristics of high aluminum, low silicon and high iron, and the ore quality is good, which is suitable for Bayer process with low energy consumption. Diaspore bauxite in China has the characteristics of high aluminum, high silicon, low sulfur, low iron and medium-low aluminum-silicon ratio. The ore quality is poor, processing is difficult, and alumina production mostly adopts combined method, which is high in energy consumption.

Gibbsite, also known as diaspore and aluminum hydroxide, has a structural formula of Al(OH)3 and a molecular formula of Al2O3 3H2O. In monoclinic system, those crystals are perfect hexagonal plates and prisms, which are often fine-grained aggregates or twins. Most gibbsite in ore is an irregular aggregate, which contains different amounts of isomorphic or mechanical inclusions, such as TiO2 _ 2, SiO2 _ 2, fe2o 3, Nb2O3, Ta2O5 and Fe2O3. Gibbsite is dissolved in acid and alkali, and its powder can be completely dissolved when heated to100℃ for 2 hours. Minerals are formed in acidic medium, and gibbsite is the primary mineral and main ore mineral in weathering crust deposits, and coexists with kaolinite, goethite, hematite and illite. Dehydration of gibbsite can be transformed into diaspore, diaspore and α corundum, which can be replaced by kaolinite and hydrated kaolinite.

Due to the rapid expansion of alumina production capacity in China, the demand for bauxite is growing too fast, which makes the supply of bauxite in China increasingly tight. Most alumina projects in Shandong are produced from imported bauxite. In 2005, the domestic bauxite import was only over 2 million tons, which increased to nearly100000 tons in 2006, and the demand soared to 25 million tons in 2007. During the period from 1 to 1 in 2007, China imported bauxite19.5 million tons, up by 143.2% year-on-year, mainly from Indonesia, India and Australia. (Zhengzhou Science and Technology Port, Analysis of the Reasons for the Recent Sharp Increase in Spot Alumina Price, 2008-0 1-09)

In the case of serious shortage of bauxite resources, our province should also consider importing some ores from abroad and even establishing production bases abroad.

Based on the situation of various countries, Vietnam should be the first choice for China enterprises to invest in overseas bauxite.

The reserves of bauxite in Vietnam and the Vietnamese government's policy on foreign investment in bauxite.

Vietnam's bauxite reserves are about 5.4 billion t, ranking fourth in the world. Among them, 965,438+0% of bauxite is concentrated in the original producing areas of western Guangdong, specifically: 6,543.8+0.44 billion tons in Da Nong Province, nearly 500 million tons in lam dong province, and about 3 million tons in Calais and Contumu Provinces. In document 1999 1000, the Vietnamese government decided 55/2007/QD. On April 23, 2007, the Vietnamese government designated bauxite mining and aluminum processing industry as priority industries. Guiding opinions of Vietnamese government on investment policies for bauxite mining and alumina production in Xiyuan area: Lintong Lu Bao alumina project with an annual output of 600,000 tons and Renji Industrial Zone in Duonong Province with an annual output of 654.38+10,000 tons invested by Vietnamese mining company will be implemented in the form of sole proprietorship. For the alumina and aluminum smelting projects with an annual output of 6,543,800 tons established after 2065.438+00, foreign capital and advanced technology were introduced in the form of joint venture and cooperation with foreign investors, but Vietnam accounted for the majority. These projects will be led by Vietnamese enterprises to explore and evaluate the reserves of mining areas in cooperation with foreign partners. The Vietnamese government stipulates that bauxite ore should not be exported.

Vietnam is the basis for China enterprises to invest in overseas bauxite. Enterprises in China's aluminum industry should first choose countries on the continental shelf of Southeast Asia, that is, some countries bordering China, among which Vietnam is the first, followed by Laos (Indonesia and India in Southeast Asia also have rich bauxite reserves). The main reasons for pushing Vietnam first are as follows: ① Vietnam belongs to a developing country, and has made considerable achievements in economic reform in recent years, with continuous improvement of infrastructure and low labor costs and market supporting costs; (2) Vietnam is a new bauxite resource country. In addition to local mining enterprises, foreign aluminum monopoly giants have not yet achieved a strong competitive position in this country, and they are on the same starting line as China aluminum industrial enterprises. (3) The land border between Viet Nam and China is beneficial to reduce the transportation cost of bauxite. (4) Direct investment in an aluminum factory in Vietnam is not only conducive to digesting bauxite raw materials on the spot and catering to the policy guidance of the local government, but also radiates aluminum products to the international market through entrepot trade, thus avoiding the risk of anti-dumping in the target market for China-made products. Jin Xiangshu, Beijing Zhongheng Yuance Information Consulting Co., Ltd., 2007.