Common unshaped refractory materials can be divided into castables, plastics, ramming materials, gunning materials, projection materials coatings according to construction methods material properties. Magnesium calcium synthetic sand
Castable is a kind of granular powdery material made of refractory material, it is composed of adding amount of binder moisture. It has high fluidity, is suitable for construction by casting method, is a common unshaped refractory that can be hardened without heating. It is composed of refractory aggregate, powder, binder, admixture, water other liquid materials. Generally, it is formed by pouring, shaking tamping at the use site, it can also be used as a preform.
Refractory castable is a kind of unshaped refractory that is widely produced used. Mainly used to construct various heating furnace linings other integral structures. Certain high-quality varieties can also be used in smelting furnaces. For example, aluminate cement refractory castables can be widely used in various heating furnaces other thermal equipment without slag acid alkali corrosion. In the parts that are corroded by molten iron, molten steel molten slag have high working temperature, such as tapping trough, ladle, blast furnace body, tapping trough, etc., a combination of low calcium pure high alumina cement can be used. A refractory castable made of high-quality granular powdery materials with high alumina content good sintering.
For another example, phosphate refractory castables can be widely used in heating furnaces soaking furnaces for heating metals, as well as coke ovens cement kilns that directly contact materials. In some parts of metallurgical furnaces other vessels that are in direct contact with slag molten metal, repairing with high-quality phosphate refractory castables also has a good effect.
As the ratio of monolithic refractories in refractory materials increases, refractory castables will develop rapidly. At the same time, the variety will increase the quality will increase accordingly. The focus will still be on the development of low cement, cement non-cement refractory castables, combined with resource conditions Choose homogenized high-quality raw materials aggregates to improve the basic composition, research promote the use of fiber-reinforced refractory castables self-flowing refractory castables, apply various additives to improve the performance of refractory castables.