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Corundum Castable

Refractory Castable



Corundum Castable

The raw material of corundum castable is fused white corundum, fused corundum or brown corundum. No matter what kind of raw materials are used as aggregate, particles with different particle sizes should be mixed in proportion, and corundum coarse particles, medium particles and powder should have appropriate formulas, and then combined with Qihe additives (silica micropowder, water reducer and explosion-proof fiber), they should be added to the raw materials and fully tempered.

Product Function

Compared with high alumina castable and mullite castable, corundum castable has higher mechanical strength and wear resistance, but its thermal shock resistance is not as good as mullite castable. Adding a certain amount of mullite into raw materials can improve the thermal shock resistance of corundum castable. Corundum castable has high compressive strength and good structural stability. Large capacity, corundum castable casting lining has good slag corrosion resistance, permeability resistance, high wear resistance and strong resistance to solid particles, powder and high temperature gas erosion.

Corundum Castable produets

Performance / Item No         ZJ-1 ZJ-2 ZJ-18A ZJ-18HS ZJ-18H
chemical composition% Al2O3 ≥98 ≥95 ≥95 ≥95 z95
SiO2 ≤0.2 ≤0.5 ≤0.2 ≤0.4 ≤0.4
Max operating temperature℃ 1850 1800 1800 1800 1800
Bulk density after baking at 110℃ g/cm3 ≥3.1 ≥3.0 ≥2.9 ≥30 ≥3.1
1500℃x3h Line changes after burning % -0.2 ~ 0.6    -0.2 ~0.6 -0.2~ 0.7 0.1~-0.3(1100℃) ±0.5
Compressive and flexural strength  Mpa 110℃x24h ≥ 20/ z4 ≥60/≥7 ≥50/≥4 ≥60/≥8 ≥70/≥7
1100℃x3h ≥50/ ≥6 ≥70/≥8 ≥70/≥9 ≥80/≥10
1500℃x3h ≥60/ ≥10 ≥100/ ≥15 ≥100/≥15 ≥120/≥10 ≥150/15
Max particle size mm 5-6 5-6 5-6 3 5-6
Construction water consumption%(weight ratio) 5-6.5 5-6.5 5-6 5-6 5-6

Product Application

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.