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Alumina Excellent High Temperature Performance

Hangzhou JWG Technology Co.Ltd | Updated: Aug 10, 2017

China's high alumina bauxite resources, has proven reserves in more than 3 billion tons, but refractory grade high grade bauxite resources accounted for a small proportion. Alumina China consumes about 100 million tons of high quality bauxite each year, which consumes about 15 million tons of refractory bauxite. In recent years, high quality bauxite has become a scarce resource in refractory industry, Alumina and the comprehensive utilization has been paid more and more attention.

The traditional high alumina bauxite clinker is produced by furnace furnace such as inverted flame kiln and rotary kiln, which is mainly composed of calcined block bauxite, which has been restricted by the factors such as ore-drawing and clinker production technology for many years, Alumina and it is difficult to meet the requirements of high temperature industry on high quality and stable bauxite clinker. At the same time, under the environment of industrial structure adjustment, the traditional production technology makes the comprehensive utilization rate of bauxite resources low, Alumina and the pollution caused by coal burning and fuel oil also challenges the living environment of mankind.

In the background of the synthesis, green and characteristic of refractory materials, the production of high alumina bauxite clinker in our country is gradually changed from the way of original block calcination to homogenization synthesis. Homogeneous bauxite synthesized by artificial homogenization has excellent high-temperature properties and is an ideal refractory material. Alumina The homogenization synthesis process of high alumina bauxite effectively solves the problem of low utilization rate of high alumina bauxite resources, endows the products with homogeneous and stable properties, and promotes the transformation and upgrading of traditional high alumina refractory products, Alumina which is a very promising development direction of bauxite calcination. In recent years, the scale of homogeneous bauxite production technology is increasingly mature, market share has been expanding.

In the new century, with the shortage of high-grade bauxite resources and the decline of the quality stability of bauxite clinker, the production and research of high alumina bauxite materials have entered a new climax. In July 2009, the development and promotion of bauxite homogenizing Materials was successfully held in Taiyuan, which led to the development of homogeneous bauxite and the orientation of product production orientation. Alumina A number of domestic enterprises to invest in the construction of homogeneous bauxite production line, homogeneous bauxite industry into a vigorous period. However, the homogeneous bauxite industry in the rapid development of the situation has also produced a lot of new problems. At present, homogeneous bauxite production enterprises are mainly distributed in Henan, Shanxi, Shandong and Guizhou, the structure and composition of bauxite ore deposits are different in different parts, and the homogeneous synthetic production process of each production enterprise is mixed, Alumina and the equipment level and quality control level of the production enterprise are uneven, which leads to the difference of the homogeneous Bauxite product index, the product specification is blank, the market competition is more disorderly. Therefore, Alumina the development of homogeneous bauxite product standards were put on the agenda.

Homogeneous bauxite is the raw material of bauxite with different alumina content, which is made of ingredients, fine grinding, homogenization, molding and High-temperature sintering, Alumina which has the characteristics of uniform composition and stable performance. In recent years, China's Henan, Shanxi, Guizhou and other places successively have a number of enterprises launched a large-scale homogeneous bauxite production line, at present, the domestic manufacturers of homogeneous bauxite production process has a greater difference, homogenization of dry, wet and semi-dry method, forming a pressure brick, pressure ball, squeeze mud, Alumina etc., calcining kiln furnace has tunnel kiln, shaft kiln, rotary kiln, conjoined kiln of the points. Among them, the degree of homogenization of wet method is best, the fluctuation of $literal content can stabilize within ± 1%, and can effectively remove the inclusions such as mechanical iron and magnetized material in the ore-forming process, which is beneficial to the late firing. In the calcining kiln, the temperature in the inverted flame kiln is uneven, the labor intensity is large, Alumina the kiln is easy to knot, the running rate is not high, and the calcination time is short, Alumina the product density is poor; shaft kiln than rotary kiln and inverted flame kiln energy-saving, but easy to knot, resulting in material difficulties, and the temperature of the knot after the temperature is uneven, Alumina local temperature is too high, the quality of stability is poor; tunnel kiln firing system is strict, temperature easy to control, small temperature, the most stable quality。


Hangzhou JWG Technology Co.Ltd