Those unshaped refractories

Common unshaped refractories can be divided into castables, plastics, ramming materials, gunning materials, projectiles and coatings according to construction methods and material properties. Magnesia brick

Castable is a kind of granular and powdery material made of refractory, which is composed of binder and water. It has high fluidity and is suitable for pouring construction. It is a common amorphous refractory that can be hardened without heating. It consists of refractory aggregate, powder, binder, admixture, water or other liquid materials. Generally, it is poured and formed by pouring, vibration or tamping on the use site, and can also be made into prefabricated parts.

Refractory castable is an amorphous refractory widely produced and used at present. It is mainly used to construct various integral structures such as heating furnace lining. Some high-quality varieties can also be used in smelting furnaces. For example, aluminate cement refractory castable can be widely used in various heating furnaces and other thermal equipment without slag and acid-base erosion. Fire resistant castables made of high-quality granular and powdery materials with high alumina content and good sintering, which are combined with low calcium and pure high alumina cement, can be used in parts eroded by molten iron, molten steel and slag and with high working temperature, such as tapping tank, steel barrel, blast furnace body and tapping ditch.

Fused magnesia brick

For another example, phosphate refractory castable can be widely used not only in heating furnaces and soaking pits for heating metals, but also in coke ovens and cement kilns in direct contact with materials. In some parts of metallurgical furnaces and other containers in direct contact with molten slag and molten metal, the use of high-quality phosphate refractory castable for repair also has good results.

With the increase of the proportion of amorphous refractories in refractories, refractory castables will develop rapidly. At the same time, with the increase of varieties, the quality will also be improved accordingly. The focus will still be on the development of low cement, cement and cementless refractory castables. In combination with resource conditions, homogenized and high-quality raw materials and aggregates will be selected to improve the basic composition. Fiber reinforced refractory castables and self flowing refractory castables will be studied and popularized, Various admixtures are applied to improve the properties of refractory castables.