The safety guarantee of ladle breathable bricks.
Breathable brick is a vital functional refractory material used in the argon blowing process at the bottom of the ladle, and one of the materials that may cause a leak in the ladle. The stable quality of breathable bricks or breathable seat bricks, the standardized operation of masonry, and the improvement and optimization of brick type can improve the safety of breathable bricks to a certain extent to prevent the occurrence of steel leakage incidents.
The use conditions of the breathable brick require that it has good high temperature resistance and thermal shock resistance to ensure the breathability and service life of the breathable brick. Ladle air-permeable bricks usually use tabular corundum as the main raw material, adding aluminum-magnesium spinel, activated alumina micropowder, bonding agent and appropriate additives, etc., and also adding some specific additives, and adjust the composition in the laboratory many times. Points, so that the air-permeable brick has good performance. In order to stabilize the production of breathable bricks and avoid some uncertain factors in the production process, our company has successively purchased a series of advanced equipment, combined with its own excellent production technology, and currently has a fully automatic temperature control system and a fully automatic high temperature kiln. , Automatic welding process, automatic forming equipment, etc., reducing the influence of human operation factors.
Figure 1 Ladle breathable brick
In the case of long-term use, the bottom of the ladle will deform to a certain extent. To prevent the bottom of the vented seat brick from hanging in the air when laying ventilated bricks, by laying dry materials or using corundum self-flowing material, the bottom of the ventilating seat bricks can be flat and compact. . If the bottom of the breathable brick is suspended in the air, the static pressure of molten steel or the impact of molten steel tapping and refining may cause the breathable seat brick to crack, and the molten steel may flow out along the cracks and eventually lead to a leakage accident.
During the hot repair of the ladle, the large-scale labor union used an oxygen lance to blow out the cold steel and steel slag remaining on the surface of the ventilating brick, so that the air volume of the ventilating brick can be ensured when it is online again. When cleaning, try to ensure that the working surface of the ventilating brick is flat, and the cleaning force should not be too large.
Figure 2 Ladle Masonry
Since its establishment, the company has focused on the R&D, production, and sales of ladle ventilation bricks, nozzle block bricks, furnace covers, etc., relying on technological innovation to update the production process, continue to forge ahead, and continue to increase technical strength. At present, the company’s larger scale advantages, brand advantages, technical advantages and management advantages have won the favor of domestic and foreign steel, non-ferrous metals and other refractory materials companies and become their product suppliers and partners.