The first choice for sand blasting is brown corundum with uniform particle size and guaranteed quality. Some of the white aluminium oxide used in industrial production is a fixed model, for example, the ceramic grinding wheel must be grade I brown corundum, grade II can not meet the use standard, and the grinding wheel is cracked and the hardness is not up to the standard. The first grade brown corundum is suitable for precision casting, wear-resistant materials and other industries with high abrasive requirements.
In other words, the final product of fused corundum can only be obtained through coarse crushing, medium crushing, crushing, segmented screening, magnetic separation, fine screening and other links. At present, as an abrasive, the chemical composition, particle size composition, magnetic content and particle density of fused corundum have national standards. When selecting, the fused Brown alumina is cooled, divided, crushed, air selected, we should strictly refer to national standards and select high-quality materials.
The fixed furnace melting block method and the dump furnace smelting method are generally used in the production of brown corundum at home and abroad. The two different production methods have their own advantages. The black corundum products produced by the dump furnace smelting method have good transparency, small crystal size and many combinations, so the flexibility is not good Because of its brittleness, the brown corundum crystal is easy to fall off.
The different smelting methods of brown corundum at home and abroad are mainly restricted by the factors of industrial structure and raw materials. It has the advantages of good density and sharpness and can be used in refractories and consolidation abrasives. The market covers Asia and Europe More than 150 countries and regions, such as Asia and the Americas, have been ranked first in the world in terms of export volume for many years.
Driven by the market demand, China's refractory industry is developing rapidly, the level of production technology and equipment is constantly improving, the quality of products is constantly improving, and the variety structure is constantly improving. So far, the variety and total amount of pink corundum refractory products in China not only meet the needs of domestic high-temperature industrial production and development, but also the export volume is increasing year by year.
The raw material is aluminum ash waste; the aluminum ash waste is washed with water until the pH value of the cleaning water is 6-7; the water content of the lost aluminum ash waste is dried to less than 1% at the temperature of 200-800 ℃; the dried aluminum ash waste is mixed with 0.5-1% of the Brown Alumina crystal seeds with the weight of the dry aluminum ash, and then melted at the temperature of 1900-2500 ℃; magnetically selected Brown corundum powder is prepared by sieving and other processes.
With the continuous deepening of the news media in various fields in various industries, we have gradually learned a lot about the latest features of some of the characteristics in areas we usually do not cover.
Among them, brown fused alumina, which is commonly used in the industrial field, is also named because of its function and properties; another name for its corundum is also because of its main use.Emery abrasives are the most typical raw material products produced for the abrasive industry.
Among them, resin sand is a more prominent one and has played a significant role in applicable industries.The application characteristics of glass sand are relatively obvious, and the outer packaging is used for decoration, and has gained a lot of recognition.
When sintered at 1500 ° C, when the content of MgO and TiO2 accounts for 4% of the total content of alumina, the flexural strength of the abrasive is the highest, reaching 198.38.The addition of a small amount of titanium oxide can improve the strength and toughness of the brown corundum abrasive.
Sometimes people use the abrasion resistance of emery to pave it into building materials for paving roads, such as train stations or underground tram stations where tens of thousands of people enter and leave every day, so that the road surface can be durable.
Although the soles of pedestrians are easier to wear, it is more troublesome to often repair the road in such a place where the traffic is flooding.However, the binding agent with too large reaction capacity, because the erosion of the abrasive particles is too large, will make the edges and corners of the abrasive particles round and sharp, brown aluminium oxide which has little effect on the grinding with X as the main goal.
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