High alumina silicon carbide brick (high alumina silicon carbide brick) refers to refractory products made of high alumina bauxite and silicon carbide as main raw materials. It has higher refractoriness and better thermal conductivity, as well as higher high temperature strength and thermal shock resistance.

The physical and chemical properties of high alumina silicon carbide bricks (for example) are as follows: Al2O3 70.88%, SiCl 0.78%, apparent porosity 20.4%, bulk density 3.3g/cm, normal temperature compressive strength 54.3MPa, load softening starting temperature 1640℃, refractoriness Greater than 1770°C.

Usually 60% of first grade high alumina bauxite clinker particles, 15% first grade high alumina bauxite clinker fine powder, 10% combined clay fine powder, 15% silicon carbide fine powder, and aluminum phosphate or sulfite pulp waste The liquid is the binding agent. According to a certain proportion and the order of addition, it is fully mixed and uniformly mixed in a wet mill, and formed by a friction brick press. After the green body is dried until the residual moisture is less than 0.5%, the impurity content in the raw materials used for sintering at 1350~1400℃ for 6~8h should be as small as possible, especially Fe2O3 has a greater impact on the high temperature performance of the product. The SiC in silicon carbide is required to be greater than 93%.

When the content of SiC in the product is high, the thermal shock resistance is improved, but the compressive strength decreases and the slag resistance performance becomes worse. Because in the production of high-aluminum silicon carbide bricks, the amount of silicon carbide fine powder is usually controlled below 30%, most of which add about 15% and the amount of clay fine powder added is below 20%, otherwise it will be more reduced The high temperature resistance of the product.

In order to make the chemical composition of the matrix part of the product more uniform and easy to sinter, it is best to pulverize bauxite clinker, combined clay and silicon carbide raw materials together and grind to the required fineness to make a mixed fine powder, and then make it. brick.

Feature

The High alumina silicon carbide brick (high alumina silicon carbide brick) has excellent oxidation resistance, thermal shock stability, compact structure, high temperature volume stability, high temperature flexural strength.

Application

The High alumina silicon carbide brick (high alumina silicon carbide brick) is Widely used in ceramic industry shed board, the prop, muffle plate, chemical industry, kiln lining, metallurgical machinery, wear resistant lining, etc furance industry.

Packaging and shipping

Standard packing: waterproof inner packing + outer packing suitable for container transportation