Alumina Refractory Balls are made of industrial alumina and refractory kaolin as the main raw materials, which are made by process of scientific proportion, shaping, and calcinating at high tempreture .
Alumina Refractory Balls is divided into ordinary refractory ball and high aluminum resistance ball.
1.Good chemical stability, no chemical reaction with materials.
2.High mechanical strength, wear resistance, and long service life.
3.Good high-temperature resistance, the highest heat resistance temperature can reach more than 1700 degrees.
4.The thermal conductivity and heat capacity is large, and the heat storage efficiency is high.
5.The thermal storage ceramic ball has good thermal stability and is not easy to break when the temperature changes drastically.
Alumina Refractory Ball is ranged diameter 20~80mm.
The size of the refractory ball generally refers to the diameter of the refractory ball. The refractory balls with the highest use rate are the refractory balls with diameters of 50 and 60, which are mainly used as regenerators of hot blast stoves. Refractory balls with diameters of 20 and 30 can only be used for filling.
The use of refractory balls with an Al2O3 content of 65% is more because the amount of heat accumulator used in the hot blast stove is large. However, at present, the hot blast stoves with more than 550 cubic meters basically use perforated bricks, and the furnaces below 450 cubic meters use refractory balls more. There are also large furnaces that use refractory balls for heat storage, but they are very few, and there may be only one in China.
1.Chemical fertilizer plant of high and low temperature transformation furnace, reformer, hydrogenation, desulfurization tank and methanation furnace, dispersed liquid, and supporting, covering and protecting catalyst role,
2.Heating furnace of iron and steel industry and the transformation of equipment.
3.Ordinary refractory ball suitable for sulfuric acid and fertilizer industries converter and transform furnace, high aluminum refractory ball is suitable for industries such as steel, urea, hot blast furnace, heating and transformation furnace and other equipment.
Precautions for the Use of Alumina Refractory Ball
The main problem encountered by the currently used refractory balls is that the high-alumina refractory balls have high hardness and brittleness, and dry grinding is likely to cause cracking of the balls and pits on the surface of the balls, resulting in very high wear. At present, only the method of polishing the ball stone before leaving the factory can only pick out the ball stone with high cracking or high wear.
How to Choose the Alumina Refractory Ball for the Regenerator?
The refractory ball has a long service life, easy replacement, and relatively low cost. But how to choose when buying? First of all, from the appearance of the ball, if the color of the ball is white or red, it is because the temperature has not been burned. Hundreds of balls stick together, affecting the ventilation of the thermal storage body. If the color is yellowish-white and there is a crystalline phase, it means that the sintering temperature is high. The strength is OK, and the thermal shock is stable.
There is also to see whether the appearance of the refractory ball has black things with iron content attached to the surface. Some are impurities in the raw materials, and some are the reasons for the furnace shell where the balls are on the furnace wall during sintering. Those attached to the surface of the refractory ball cannot be used.