Refractory Castable

PRODUCTS

0102

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.

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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
chemical composition%	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

In the production process of refractory bricks, poor molding or firing problems may be related to unreasonable particle grading.