Since the 1970s, the application of refractory balls has gradually come into people’s realization, and its thermal properties better than those of lattice bricks have made it a newer material for hot air furnaces, especially ball-type hot air furnaces.
KRNC has developed low creep refractory balls, magnesium-aluminum refractory balls, chrome corundum refractory balls, high alumina refractory balls and other refractory ball products. For example, low creep refractory balls are made of selected raw materials such as bauxite, white woolen clay, white clay, lamproite, silica, lignite, etc., which are pressed according to a reasonable formula after a reasonable particle gradation. Its indexes meet the standard of high alumina ball.
At present, modern blast furnaces mostly use thermal storage hot blast furnace, whose working principle is to burn gas first, use the generated flue gas to heat the refractory ball in the storage chamber, then heat the cold air through the hot refractory ball, and then alternate the hot blast furnace in turn to burn and send air, so that the blast furnace continuously obtains high temperature hot air. Therefore, it is important to improve the heat transfer efficiency of the hot blast furnace to increase the wind temperature. And increasing the heating area of refractory balls is an important technical measure to improve the heat transfer capacity. In recent years, with the improvement of hot blast furnace operation system, domestic iron and steel enterprises have made attempts in applying high-efficiency refractory balls by optimizing the structure of refractory balls, reducing the aperture of refractory balls and increasing their heating area, thus improving the heat transfer efficiency and thermal performance of refractory balls.
After several times of process optimization, KRNC has now formed a refractory ball production line with high quality, good performance and high finished product rate.
When the customer purchases refractory balls from KRNC, firstly, the business department will contact with the customer to understand the actual needs of the customer and the environment of the kiln, and help him to choose the reasonable model and performance index. After the two sides reach the cooperation intention, KRNC completes the material proportioning, refractory ball forming, drying, firing and other work according to the demand. Finally, the finished products will be handed over to the customer with perfect instructions on how to use the products and how to maintain the furnace.
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