Microporous corundum brick is made of seven kinds of refractory raw materials by pressing according to the following proportion: metallic silicon 6-11%, silicon carbide 4-16%, alumina 3-7%, dense corundum 28-52%, mullite 6-11%, brown corundum 18-38%, resin 2-7%. After the above raw materials are mixed evenly, they are side pressed and formed by full-automatic 2500t hydraulic press. In the firing process, a new type of energy-saving and environmental protection shuttle kiln is used. The fired microporous corundum The porous corundum brick can not only meet the requirements of long life of blast furnace, but also completely replace the imported products. It can be used as the ceramic cup in the hearth area of blast furnace, including the combination brick of tuyere, iron clasp and slag mouth. It can be used to build the hearth brick lining with the small molded carbon brick, or with the large microporous carbon brick.

Project Indicators	WGZ-1	WGZ-2
AL2O3,%	≥80	≥85
Fe2O3,%	≤1.0	≤0.8
bulk density g/cm3	≥3.10	≥3.20
Apparent porosity %	≤16	≤14
Normal temperature compressive strength MPa	≥140	≥160
Air permeability	≤1.0	≤0.5
Molten iron dissolution index	≤1.5	≤1.0
Slag erosion resistance	≤8	≤6
Average aperture	≤0.5	≤0.3
Hole volume%	≥70	≥75
Thermal conductivity (600 ℃), w / m.k	≤5	≤5
Alkali resistance	Excellent (U) no crack	Excellent (U) no crack