High Load Softening Temperature Castable for Metallurgical Kilns Premium Refractory Product

Spinel castable is a high-performance amorphous refractory material composed of multiple components. After mixing, molding and curing, it can maintain good performance in high temperature environment. Main ingredients Usually composed of aggregate, powder, binder and additives. Aggregates generally use corundum, magnesia, etc., which provide high strength and high temperature resistance; spinel powder in the powder is the key component, which can improve the thermal shock resistance and erosion resistance of the material, while alumina micropowder and silicon micropowder help to improve the density and high temperature performance of the material; binders such as calcium aluminate cement and silica sol give the castable good molding performance and initial strength; additives such as water reducers, coagulants, retarders, etc. can adjust the construction performance and setting time of the castable. Performance characteristics High refractoriness: It can withstand high temperatures above 1600℃ and can meet the use requirements of various high-temperature industrial kilns. Good thermal shock resistance: The presence of spinel gives it excellent thermal shock resistance, can withstand frequent temperature fluctuations without cracking or peeling, and improves the service life of the material. Strong corrosion resistance: It has good resistance to various corrosive media such as molten steel, slag, and glass liquid, thanks to its dense structure and the chemical stability of components such as spinel. High strength: It has high room temperature compressive strength and high temperature strength, and can withstand loads and mechanical shocks at high temperatures. Good construction performance: By adjusting the type and amount of additives, the castable can have good fluidity and plasticity, which is convenient for construction and can be made into linings of various shapes and sizes to meet the structural requirements of different kilns. Application areas Iron and steel industry: It is widely used in linings of ladles, tundishes, converters, etc. In ladles, it can withstand the erosion and scouring of high-temperature molten steel; in tundishes, it can provide a stable storage and transportation environment for molten steel to ensure the smooth progress of the continuous casting process. Nonferrous metallurgical industry: It is used in aluminum electrolytic cells, copper smelting furnaces and other equipment. In aluminum electrolytic cells, it can resist the erosion of electrolytes and aluminum liquids, and improve the service life and production efficiency of electrolytic cells. Glass industry: It is one of the key refractory materials for glass kilns and is often used in kiln roofs, pool walls, flow holes and other parts. At the top of the kiln, it can withstand the radiation and scouring of high-temperature flames; at the pool wall, it can resist the erosion and scouring of glass liquid to ensure the normal operation of the glass kiln. Other fields: It is also used in high-temperature kilns in the ceramic and cement industries, such as the furnace lining of ceramic kilns and the transition zone of cement rotary kilns, which can improve the thermal efficiency and service life of kilns and reduce energy consumption and production costs. Production process Raw material preparation: Select high-purity and high-quality raw materials, and accurately weigh various aggregates, powders, binders and additives according to the formula. Mixing and stirring: Add the raw materials to the mixer, stir and mix them thoroughly to make the various components evenly distributed to form a mixture with good performance. Molding: Pour the mixed castable into the mold and make it densely molded by vibration, tamping and other methods. For some large or complex-shaped products, special molding processes may be required, such as injection molding, self-flow molding, etc. Curing: The castable after molding needs to be cured under certain temperature and humidity conditions to make the binder hydrate and form strength. The curing time and conditions depend on the specific type of binder and product requirements. Drying and heat treatment: The castable after curing generally needs to be dried to remove the moisture, and then heat treated as needed to further improve its performance. The heat treatment temperature and time are adjusted according to the use requirements and composition characteristics of the castable.