Alumina Polishing Powder Wholesale Price Germany

The phosphor bricks in the United States are long strips with a size of 4270 × 558 × 558 mm, and the longest is 6.5 meters(white aluminum oxide rubbing compound); the carbon bricks in the furnace bottom in Japan are 2.5 meters long. The hearth, hearth and bottom of the furnace wall are made of carbon bricks with a rectangular or fan-shaped cross-section of 230 to 800 mm in length(brown fused alumina for abrasive). According to the data, the axial thermal conductivity of carbon brick is 2.5 times greater than that of the horizontal direction.

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Therefore, the carbon bricks of the bottom of the blast furnace in West Germany and other countries adopt the vertical bricking method, which is not easy to float(white aluminium oxide grit), and is beneficial to the cooling of the bottom of the furnace and prolong the service life. During the construction of this kind of filler, no heating is required, and it can be operated at normal temperature(aluminium oxide for blasting). The quality is reliable, the working environment is good, the labor intensity is low, and the use effect is good.

When building carbon bricks, between bricks and bricks or furnace skins(brown fused alumina), use thick and fine seam paste (that is, use anthracite or metallurgical coke as aggregate and powder, and use leaching or resin as threading agent) to ramming construction. Make it dense(brown fused alumina bfa grade a manufaturer). In recent years, in order to strengthen the furnace bottom cooling, the filler is mixed with silicon carbide and graphite, or all graphite materials are used to improve the thermal conductivity.

In order to improve the life of the blast furnace bottom, Japan uses asphalt impregnated carbon bricks to reduce the porosity by 40% and increase the strength by nearly 1.4 times(brown aluminum oxide). Countries such as the United States, West Germany, Japan, and the Soviet Union used various methods to measure the temperature and heat flow of the blast furnace bottom, and found that the erosion of the blast furnace bottom and the all-carbon brick bottom showed a pot bottom shape(white fused alumina make company).

During the trial process, the penetration depth of the undiffused carbon brick molten iron is about 200 mm, and penetrates into the pores of 2 microns(brown aluminium oxide); after the immersion, the carbon brick molten iron penetrates less, which can prolong the service life of the furnace bottom lining. Therefore, the blast furnace bottom of all countries has a trend of thinning(white aluminum oxide sand), and at the same time, it is developing in the direction of the full carbon brick furnace bottom.

Production practice has proved that the bottom of the furnace is too thick, and the erosion is very fast after the furnace is opened(white aluminium oxide powder). Until the heat taken away from the cooling system reaches a balance, can reduce the thermal resistance, the erosion tends to be slow. The thickness of the bottom of the full carbon brick of the West German blast furnace is generally 2.0 ~ 2.5 meters(46 grit aluminum oxide blast media). The bottom of the furnace of the British shanghai furnace is about 8 meters in diameter.

For example, the integrated bottom of the 1719-meter blast furnace was changed to full carbon brick(brown aluminum oxide sand), and its thickness was reduced from 5600 mm to 1900 mm, and the erosion depth was reduced from 4100 mm to 1900 mm. In recent years, 3.5 meters long carbon bricks are commonly used to build the furnace bottom; or conducted disintegration studies(white aluminum oxide non-skid grit), A blast furnace in Belgium uses a full carbon brick bottom, the carbon brick size is 6400 × 800 × 600 mm.

It is made of two or four layers of carbon brick, and the thickness is 1.14 meters and 2.40 meters respectively(aluminium oxide material for blasting); In particular, the No. 9 blast furnace of the West German Hanborn plant has a hearth diameter of 8.4 meters, a bottom layer of carbon bricks and a center thickness of about 1.2 meters(white aluminum oxide crystals). The furnace has been operating for several years without problems, and the erosion depth is basically consistent with the calculation results.