Bosh has access to the hearth and bosh. This area temperature is higher, the lower part of furnace charge temperature at 1600 ~ 1650 ℃, air temperature is high, and formed a lot of slag dropping in the middle. The area of thermal radiation, slag erosion is very serious. In addition, the invasion of the alkali metal, carbon deposition caused by chemical action, top-down melt and bottom-up also, and the erosion of hot air heating. So, furnace abdomen has always is a key link in the process of blast furnace life is shortest. As a result, the area of the material should have high erosion resistance and scouring resistance, but also have certain ability to thermal shock. As a result, the modern large and medium blast furnace in the parts adopt this kind of refractory is common. Burning aluminum carbon brick and burning microporous carbon brick also has good compressive, bending and erosion resistance, erosion resistance, good thermal conductivity, and easy to hang slag, the most important thing is that thermal shock ability is strong, the price is more convenient, in the medium and small and medium blast furnace used in common in our country.
