High Alumina low Cement Castable Introduction
High alumina low cement castable in which the micro-silica powder (particle size less than 5um) with the same or similar chemical composition as the main material of the castable is used to replace part or most of the cement, and a small amount of dispersant (water reducing agent) is added. A certain amount of delayed retarder is prepared. High strength low cement refractory castables: castables with a cement addition of 3-8% and a CaO content of between 1-3% are called low cement refractoriness castable with a CaO content of less than 1.0% are referred to as ultra-low cement castables.
High Alumina low Cement Castable Features
1. The low content of calcium oxide in the high alumina cement castable can reduce the eutectic phase formed in the material, thereby improving the refractoriness, high temperature strength and slag resistance.
2. The cement hydrate formed after molding curing is small, and there is no problem that the hydration bond is broken during heating baking to lower the medium temperature strength, but is gradually sintered as the heat treatment temperature is increased, and the strength is gradually increased.
3. The water requirement of the low cement refractoriness castable is greatly reduced, so the porosity is low and the bulk density is high.
Compared with traditional high low cement refractory castable, it has "low cement content; higher density and low porosity; higher room temperature curing strength; good volume stability, small volume shrinkage after drying and calcination。
High Alumina low Cement Castable Specification
Brand Al2o3 Material Working Temperature Refractoriness Bulk Density After burning line Compressive strength after burning
%≥ ℃ ≥ ℃ g/cm3 1400℃ 110 ℃*24h 1400℃ *3h
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| RS-N 40 Fire 1400 1650 2.2-2.4 +-0.5(1300℃ ) 35 50 ( 1300℃ ) |
| RS-L1 60 Alumina 1500 1700 2.3-2.5 +_0.3(1350℃) 40 50(1350℃ ) |
RS-L2 70 Alumina 1600 1750 2.6-2.8 +_0.5 40 60
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RS-M 60 Mullite 1600 1750 2.4-2.6 +_0.5 40 60
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RS-A1 85 Corundum 1700 1790 2.8-3.0 +_0.5 50 80
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RS-A2 90 Corundum 1800 1800 2.9-3.2 +_0.5 50 100
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High Alumina low Cement Castable Influencing Factor
The preparation process of low cement refractory castables is very strict, so there are many factors affecting performance, mainly including ultrafine powder, aluminate cement and admixtures. Refractory aggregates and admixtures, etc. The amount of refractory aggregate and water is also an important factor.
High Alumina low Cement Castable Application
High alumina low cement refractory castable is main applications of high strength and low cement refractory casting: The use temperature of low-cement castables and ultra-low cement castables is higher than that of high alumina cement refractory castable of the same material. Clay and high-aluminum low-cement castables can be used in various heat treatment furnaces such as heating furnaces and soaking furnaces and linings of rotary kiln.
The mullite low cement refractory castable can be used for the lining of various high temperature burners, the water cooling tube wrapping lining of the heating furnace, and the like. Corundum and chrome-containing corundum low-cement castables can be used for lining of certain parts of the refining equipment outside the molten steel furnace, and can also be used for the lining of the power frequency induction furnace, the high-temperature wear-resistant lining of the petrochemical catalytic cracking reactor. The Al2O3-SiC-C low cement refractory castable can be used as a lining for the blast furnace tapping groove, the iron casting trough of the iron furnace, and the integral dusting gun for hot metal pretreatment.
High Alumina low Cement Castable Using Method
Water is added in proportion, and the machine is stirred into a mortar and shaken to form.
High alumina low cement refractory castables and ultra-low cement castables are used at a higher temperature than ordinary refractory castables of the same material. Clay and high-aluminum low-cement castables can be used in various heat treatment furnaces such as heating furnaces and soaking furnaces and linings of rotary kiln. The mullite low cement castable can be used for the lining of various high temperature burners, the water cooling tube wrapping lining of the heating furnace, and the like. Corundum and chrome-containing corundum low-cement castables can be used for lining of certain parts of the refining equipment outside the molten steel furnace, and can also be used for the lining of the power frequency induction furnace, the high-temperature wear-resistant lining of the petrochemical catalytic cracking reactor. The Al2O3-SiC-C low cement refractory castable can be used as a lining for the blast furnace tapping groove, the iron casting trough of the iron furnace, and the integral dusting gun for hot metal pretreatment.
Low cement series refractory castables refer to castable refractories with a calcium aluminate cement addition of less than 8%. The CaO content in the refractory castable is required to be less than 2.5%. Its main products are low-cement, ultra-low cement and cement-free refractory castables, featuring high density, low porosity, high strength, low wear, thermal shock resistance and erosion resistance, as well as volume stability and construction water usage. Low characteristics. According to its material type, it can be divided into low cement refractory castables such as aluminum silicate, mullite, corundum, magnesium-aluminum, spinel, carbon and silicon carbide. According to its use, it can be divided into blast furnace tapping refractory castables and steel making ladle refractory castables.
Why Choose RS Factory as High Alumina low Cement Castable Supplier
Rongsheng refractory manufacturer has 20 years of quality assurance, bringing maximum benefits to customers.
❉Rongsheng refractory castables manufacturer has four advantages
1.Rongsheng refractory bricks manufacture have strong production capacity, supply is guaranteed
2.Rongsheng refractory bricks company has professional refractory brick production plants and amorphous refractory production plants.
3.,Rongsheng refractory bricks manufacture Have advanced concepts and scientific management.
Rongsheng Refractory is constantly committed to quality management, process management and cost management, strives for internal strength, adheres to the development of science and technology, wins by quality and reputation, provides technical guidance services to provide customers with quality products and services.
4.Rongsheng refractory bricks manufacture have perfect after-sales service system
From raw material procurement to final product inspection and after-sales service. Ensure that the product offered to the user is 100% qualified.
