What Are The Refractory Castables Commonly Used in High Temperature Kilns

First, the application of refractory castable in cement rotary kiln.
Refractory castable has been widely used in the new dry cement rotary kiln. According to the different working environment of the kiln, the refractory castables used are ordinary refractory castables, low-cement refractory castables, ultra-low cement refractory castables, cement-free refractory castables, steel fiber refractory castables, anti-explosion refractory castables, anti-crust refractory castables, phosphate refractory castables, alkali resistant castables, thermal insulation castables, in addition, There are also new castables such as artesian refractory castables.
Second, the application of refractory castable in glass melting kiln.
Due to the requirements of the working environment of the glass melting kiln itself, the refractory castables used should have the characteristics of good high temperature resistance, strong resistance to glass erosion and low porosity. The refractory castables mainly used are fused quartz castable, corundum castable, light mullite castable, zircon ramming material and so on.
Third, the application of refractory castable in metallurgical industry.
(1) Refractory castable for ironmaking system
In the iron-making system, refractory castable is used more in the iron channel of blast furnace, and ASC refractory castable is generally used. ASC castable is generally low cement or ultra-low cement castable, mainly composed of Al2O3 aggregate, SiC, carbon, refractory cement and various admixtures. The use of different parts, the use of different materials, such as in the main ditch, slag ditch, branch ditch and so on.
(2) Refractory castable for hot metal pretreatment
In the application of refractory castable in hot metal ladle, aluminum silicon carbide carbon castable is mainly used in the furnace bottom, molten pool and slag line. The spray gun is an important device for the pretreatment of hot metal. Now the refractory material used in the spray gun is mostly cast as a whole, and its material is mainly Al2O3-SiO2. The integral spray gun made of the castable has the characteristics of uniform structure, no joint, good thermal shock resistance and long service life.
4. Refractory castable for electric furnace steelmaking
The application of refractory castable in electric furnace is mainly concentrated in the furnace cover. The integral castable prefabrication technology is widely used in the electric triangle area. The material of the prefabricated block is divided into corundum, high aluminum, mullite, the user provides drawings and the use of the site, the temperature, the manufacturer uses the appropriate refractory castable according to the drawings into the prefabricated parts, after maintenance, baking and delivery, transported to the user site can be spliced on the spot.
5. Refractory castable for furnace refining
(1) RH furnace refractory castable. A small amount of high alumina castable and aluminum-magnesium castable are used in the lining of RH furnace. Al2o3-mgo ·Al2O3 castable integral lining or spray filling integral lining is used in the upper part of RH vacuum chamber. Monolithic aluminum-magnesium castable for RH furnace impregnation tube outer wall.
(2) LF refractory castable for furnace. LF curtain wall is mainly made of high aluminum or corundum series castables. High aluminum-spinel refractory castable is mainly used to cast large bricks in the impact area of bottom cladding.
(3) Refractory castable for CAS refining device. CAS refining unit is divided into upper and lower parts, the use of refractory materials are castable; The upper part mainly uses low expansion Al2O3-SiO2 castable. The lower part mainly uses fused corundum with MgO fine powder corundum spinel series castable. In order to prolong the service life of the device in the later stage, magnesia aluminum spray filler is mostly used.
(4) refractory castable for ladle. The varieties of refractory castable for ladle mainly use aluminum-magnesium castable and aluminum-magnesium spinel castable.
6. Refractory castable for continuous casting
The castables for the intermediate coating are: light castables (mainly used for insulation), high aluminum or mullite artesian castables corundum and magnesium castables (used for covering the bottom working layer).

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