Best Aluminium Oxide Grit Blasting Vendor Hungary

Generally, air cooling is used, which is safe and economical(aluminium grit blasting); water-cooled has a high cooling intensity, but when a large amount of molten iron penetrates into the bottom of the blast furnace, there is a possibility of furnace bottom explosion. At present, after adopting a comprehensive furnace bottom and cooling facility in various countries(aluminum oxide 180 grit blast media), it is foolproof to use one furnace, and some can use two furnaces.

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It is well known that the 1150 ° C isotherm in the furnace bottom masonry can be considered as the erosion depth of molten iron(white aluminum oxide). When there is a cooling facility at the bottom of the furnace, the isotherm can be reduced, that is, the isotherm shifts or the viscosity of the molten iron is increased, which can protect the furnace bottom lining brick and prolong the service life(black silicon carbide manufacturers); oil-cooled furnace bottom is only used by a blast furnace in a Swedish steel plant. 

For this reason, cooling facilities are generally installed at the bottom of blast furnaces in various countries(white corundum), and carbon bricks and i-bricks with thermal conductivity are selected for construction, and good technical and economic results have been obtained. Now the carbon bricks are used on the bottom and hearth of large and medium-sized blast furnaces(brown fused aluminum oxide manufacturers), and they are extended to the lower part of the furnace body.

As early as 1939, West Germany used carbon bricks on the bottom of the blast furnace(garnet abrasive). The Soviet Union and the United Kingdom began to use carbon bricks to build blast furnace bottoms in 1944 and 1945, but little progress was made. Only 5% of the blast furnaces in the Soviet Union used carbon brick bottoms in 1958. The United Kingdom began to attach importance to them around 1970(brown aluminum oxide 80 grit). This technology, and have poor alkali corrosion resistance.

Carbon brick is mainly composed of carbon or stone(garnet suppliers). It is characterized by good thermal conductivity, small thermal expansion coefficient, high temperature volume stability, and strong chemical resistance. However, carbon bricks are easily oxidized, and the scope of use is limited(best alumium oxide for glass blasting). For this reason, countries have conducted research on the raw materials, manufacturing, and use of carbon bricks to improve the performance of carbon bricks.

The fixed carbon, alkali corrosion resistance and compressive strength of the carbon bricks at the bottom of the mouth blast furnace have been improved(steel grid). Blast furnace carbon bricks can be divided into two types: carbonaceous, natural graphite and artificial graphite according to different raw materials(white aluminium oxide 180/220). Carbonaceous is divided into metallurgical coke, anthracite, pitch coke and petroleum coke, etc., their solubility in molten iron is in turn Increment.

Therefore, when manufacturing carbon bricks, metallurgical coke and anthracite are generally used as raw materials(glass bead blasting media suppliers). The carbon brick made by metallurgical coke is compact, high-strength and easy to process. However, compared with carbon bricks made from non-combustible coal, metallurgical coke particles are porous, prone to reaction(brown aluminium oxide grit). Therefore, it is an ideal lining material for building blast furnaces such as bottoms and hearths.

At the same time, thermal expansion is also poor(brown aluminum oxide factory). Therefore, in terms of isotherms at 1150 ° C, when the depth of the comprehensive furnace bottom is about 1 meter, the bottom of the gold carbon brick furnace is only about half a meter(white aluminum oxide 80 grit). Therefore, at present, most large and medium-sized blast furnace bottoms in various countries are made of carbon bricks, but the structure of the furnace bottom is different, The effect is good but the cost is too high.