Aluminum oxide, also known as aluminum oxide, commonly referred to as "aluminoxane", is a white amorphous powder, in mining, ceramics, and material science also known as alumina. Alumina has important applications in the national economy and production. Bauxite (Al2O3·H2O and Al2O3·3H2O) is the main mineral of aluminum in nature. At present, the alumina produced by the Bayer method by extracting aluminum from bauxite accounts for more than 90% of the total output. The Bayer process refers to a process in which a bauxite is pulverized and then impregnated with a high-temperature sodium hydroxide solution to obtain a sodium aluminate solution; then, a series of chemical reactions and production processes are used to obtain an α-alumina powder. The production method was invented by the Austrian scientist Bayer (K.J. Bayer) in 1888 and is still the main method of industrial production of alumina, which is called the "Bayer method". Therefore, in the production process of alumina, the crushing process of bauxite is related to the quality of production, and the crushing system is a throat portion for producing alumina. For this reason, it is particularly important to reduce the investment, to select the crushing equipment, to increase the proportion of finely crushed products in the crushing system, and to increase the crusher productivity and improve production efficiency. Broken bauxite Generally, alumina plants must be crushed before bauxite grinding, but there is no need to break according to the shape of the ore. The Baton Rouge plant in the United States uses the Suriname bauxite mine and crushes it to 12/inch or less using a hammer crusher , and then grinds it with a rod mill. Jamaican boehmite is only ground with a clay rod mill. In Australia's Queensland region, hundreds of millions of tons of bauxite mines are almost all of the bean-shaped gems below 10 to 15 mm. There is no need to break. Depending on the occasion, the crushers used are roller crushers, cone crushers , jaw crushers and hammer crushers. Vertical shaft impact crusher processing bauxite At present, the processing equipment and processes commonly used in alumina plants are: coarse crushing of jaw crusher - crushing (or fine crushing) in double-roll crusher - rough grinding with sieve ball mill - rim machine for shaping. The extrusion processing equipment mainly crushing and grinding principle, high equipment cost, large-area, complex process, strip-shaped sheet-like multi-grain products, low bulk density, with high iron content, low yields, of foreign difficult to meet Product quantity and quality requirements. In the past, these products were exported in the form of lump or large grain. In recent years, foreign companies mainly import small particle sizes of 0 to 6 mm, and have strict requirements on the shape and packing density of the products. Therefore, in the past, various processing plants used traditional processing equipment and processes, which not only had low yield, but also had no grain size or stacking density. After years of hard work, Shanghai Yuli Road & Bridge Equipment Co., Ltd. has developed a PCL vertical shaft impact crusher and a complete set of processing technology. It has been proven by more than 10 processing plants for many years: PCL vertical shaft impact crusher is a fine crushing, coarse grinding, shaping and Integral, used to process small-grain products, large output, good grain shape, stacking density and grading have reached export standards, bringing huge economic benefits to bauxite processing enterprises, and has been well received by users. PCL vertical shaft impact crusher working characteristics: (1) The structure is simple and the cost is low; (2) High efficiency and energy saving, high crushing efficiency; (3) It has the function of fine crushing and coarse grinding; (4) The ability to pass non-crushed materials is strong, and the influence of moisture content of the material is small, and the water content can be selected as 9%; (5) It can crush medium and hard materials (such as corundum , silicon carbide, sintered bauxite, etc.); (6) The product is cubic and the iron pollution is small; (7) The object in the impeller and the vortex breaking chamber is directly lining to reduce the wear parts cost and maintenance workload; (8) Operation and maintenance, easy to install; (9) The working noise is lower than 75 decibels (dB level), and the dust pollution is less; (10) Light weight, various installation methods, and movable installation. Shanxi Hengyang Jinhengyuan Alumina Boiler Factory is an bauxite processing enterprise, mainly processing bauxite and other mineral products. In 2010, the processing scale was 200,000 tons, and all products were exported to foreign countries. Due to the large output of the plant, it adopts a flat layout. We tested the processing line on site, crushing the sintered bauxite 6mm finished product 149.9t / h, of which 0 ~ 1mm is 7.8t. The specific test results and particle size composition are shown in Table 3. S-8 vertical shaft impact crusher in the processing of aluminum bauxite in Jinquanyuan Alumina Boiler Factory in Yangquan City, grain size composition, grain production, production / t% /% cumulative /% 3-6mm42.56028.3799.98 1-3mm57.3938.2671.61 1-0.8mm1.020.6833.35 20-35 mesh 12.188.1232.67 35-60 mesh 11.867.9124.55 60-80 mesh 4.0652.7116.64 80-120 mesh 5.423.6113.99 120-200 mesh 6.454.3010.32 -200 mesh 96.026.02 Total -200 mesh - 6mm149.999.98 Through the use of nearly 10 alumina plant manufacturers in the country for many years, the PCL vertical shaft impact crusher adopts the principle of material and material self-impact crushing, has high output, low wear of the wearing parts, rapid replacement, and the product particles are cubic, and The characteristics of less iron content are applicable to hard, medium-hard materials and materials with too much water content, and the working noise is low, the dust is less, and the price is only 1/10 of the import price. We believe that in the near future, PCL vertical shaft impact crusher will be used more widely, and the economic benefits for the majority of users will be more impressive. Hubei ruiyate Automobile Co.,Ltd , https://www.nbruiyate-automobile.com