Refractory ball (heat storage ball)

1. High alumina ball has the characteristics of strong oxidation resistance and slag resistance. The ceramic refractory ball can be easily replaced and cleaned, and can be reused.

2. Main specifications of refractory ball: Φ40mm 　Φ50mm 　Φ60mm 　Φ70mm

3. The materials of refractory ball products are divided into: high-aluminum, corundum, and zirconium corundum.

4. There are many types of refractory balls, which can be used in high and low temperature conversion furnaces, reformers, hydrogenation converters, desulfurization tanks, and refractory balls and heating conversion equipment that are replaced by hot blast furnaces in the iron and steel industry.

5. Heat storage porcelain refractory balls have the advantages of high strength and wear resistance; large thermal conductivity and heat capacity, high heat storage efficiency; heat storage porcelain balls have good thermal stability and are not easy to break when the temperature changes suddenly. The heat storage ball is especially suitable for the heat storage filling of the heat storage of air separation equipment and the blast furnace gas heating furnace of the steel plant. The heat storage ball doubles the preheating of gas and air, and the heat storage ceramic ball makes the combustion temperature quickly reach the rolling steel to heat the billet. Requirements.

6. High alumina ceramic refractory balls, high alumina content, high density, high mechanical strength, good wear resistance, stable chemical properties, excellent heat resistance, high alumina ceramic balls are widely used, and can be used as chemical fillers. High alumina ceramic balls can also be used as grinding media. High alumina ceramic refractory balls are widely used in chemical, mechanical, electronic, environmental protection and other fields.

1. High-aluminum refractory ball usually refers to the content of Al2O3. The popular point is the content of aluminum oxide in the raw material of the refractory ball. The aluminum content determines the level of other various properties. Therefore, it is the main performance index of refractory ball. High-aluminum refractory balls can be divided into four types according to the aluminum content: first-level high aluminum content 75; second-level high-aluminum balls, ZN-65 with 65% aluminum content; third-level high-aluminum balls, with aluminum content 55% The ZN-55.

2. Bulk density is the ratio of the dry mass of the refractory ball to its total volume, and the unit is g/cm3. The bulk density mainly indicates the compactness of the refractory ball. Generally, the bulk density of refractory balls is closely related to their porosity and mineral composition. In the refractory ball, the higher the bulk density, the better the quality of the product. The volume densities of the four types of refractory balls are: first grade high alumina ball ≥ 2.5; second grade high alumina ball ≥ 2.3; third grade high alumina ball ≥ 2.1.

3. The apparent porosity is the ratio of the volume of the open pores of the refractory ball to the total volume. Generally, the slag and harmful gases in the kiln corrode the refractory ball itself through the open pores. Therefore, it is required that the apparent porosity of the refractory ball is as small as possible. The apparent porosity of the four types of refractory balls are: first-level high-aluminum balls≤24%; second-level high-aluminum balls≤26%; third-level high-alumina balls≤28%.

4. The pressure resistance value at room temperature has a great influence on the production, transportation and use performance of the refractory ball, so a higher pressure resistance value is required. The unit is expressed in KN. The pressure resistance values ​​of the four types of refractory balls at room temperature are: special high aluminum ball ≥ 25; first grade high aluminum ball ≥ 15; second grade high aluminum ball ≥ 10; third grade high aluminum ball ≥ 8.

5. The load softening temperature of the refractory ball refers to the temperature at which it deforms during use. The load softening temperature of the four types of refractory balls are: special-grade high-aluminum balls ≥1530℃; first-grade high-aluminum balls ≥1480℃; second-grade high-aluminum balls ≥1450℃; and third-grade high-aluminum balls ≥1400℃.

6. Thermal shock stability is the ability of the refractory ball to resist temperature changes in rapid cold and rapid heat. To measure this performance index of refractory ball, it is usually expressed in number of times under the condition of 1100℃ water cooling. The thermal shock stability of the four types of refractory balls are: special high alumina ball ≥ 10 times; first grade high alumina ball, second grade high alumina ball, and third grade high alumina ball ≥ 15 times.

Seven, physical and chemical indicators: