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High alumina refractory castable

Refractory Castable



High alumina refractory castable

High-alumina castable is a refractory castable made of high-alumina raw materials as aggregate and powder and binder.


High alumina refractory castable is widely used in the masonry and maintenance of industrial kilns. Common high-alumina castables include portland cement castable, calcium aluminate cement castable, water glass bonded castable, phosphate bonded castable and so on. With the continuous innovation of product types, the quality of high-alumina castables has also gradually improved, including low-cement refractory castables, ultra-low cement castables and cement-free castables.

High alumina refractory castable

Product name / index High alumina cement refractory castable Low calcium aluminate cementRefractory castable
Clay refractory castable High aluminum refractory castable
Aluminum-40 Aluminum-50 Aluminum-55 Aluminum-65 Aluminum-70
Volume density(110℃±5℃x24h)> kg/m 1900 2100 2200 2300 2500
 Drying compressive strength Mpa 20 23 20 23 40
 Drying flexural strength Mpa 4 5 4 5 6
 800℃ high temperature residual strength % 40 50 40 50 60
Thermal shock stability 15 15 15 15 20
Line changes after burning, moisturizing for 3h, no more than 1% of the experimental temperature 1200 1250 1300 1350 1400
Refractory degree> 1650 1670 1700 1730 1770
AL203>  % 40 50 55 65 75
 Max particle size of refractory aggregate mm When the pouring thickness is ≤60mm, ≤5mm
When the pouring thickness is 60-100, ≤10mm
When the pouring thickness is ≥100mm, <15mm

Product Function

Ferrosilicon furnace is an industrial electric furnace that consumes a lot of power and is a type of submerged arc furnace. Ferrosilicon furnace includes furnace shell, furnace cover, furnace lining, short net, water cooling system, smoke exhaust system, dust removal system, electrode shell, electrode pressure release and lifting system, loading and unloading system, controller, burn-through device, hydraulic system, transformer And various electrical equipment, etc., the use of refractory materials is also quite demanding.

In 2006, Our factory was founded in Yuzhou, the raw material base.High bauxite ore is a finely divided colloidal mixture composed of aluminum hydroxides and various ratios. High-alumina bauxite in the refractory industry usually refers to bauxite ore with a calcined Al₂O₃ content greater than 48% and a low Fe₂O₃ content.


Product Application

high alumina refractory castable is suitable for heating furnace, soaking furnace, heat treatment furnace and rotary kiln; Various high-temperature burner linings, heating furnace water pipe wrapping linings, parts of refining equipment outside molten steel furnace and high-temperature wear-resistant linings of petrochemical catalytic cracking reactors; Liners such as blast furnace taphole, cupola taphole, integral powder gun for hot metal pretreatment, etc. It can also be used to manufacture large prefabricated blocks and furnace linings for rapid construction.