Ladle Permanent Layer Composite Castable

Ladle castable is based on low cement castable, using ultrafine powder technology, excellent binder and high-efficiency admixture, under the guidance of basic material theory, according to the different use and operating conditions of various types of ladles, scientific formula is formulated, particle size composition is precisely adjusted, and binder and admixture are reasonably selected.
The service life is improved, the unit consumption of refractory materials is reduced, the cost is reduced, the labor intensity is reduced, the working environment is improved, and the promotion prospects are very broad.

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Description

The permanent layer castable for ladle has the following advantages: good fluidity, suitable solidification time; labor-saving, quick and convenient; high strength, long life; good thermal insulation performance, high temperature resistance, corrosion resistance and thermal shock resistance.

The permanent layer castable for ladle is the calcium aluminate phase with the highest Al₂O₃ content in the CaO-Al₂O₃ system. Its melting point is 1875℃, the thermal expansion coefficient is 8.0×10-6℃⁻¹, the volume density of the particles is 2.70g·cm⁻³, and the apparent porosity is 26.8%. The refractory performance of this material is similar to that of plate-shaped corundum, while the thermal conductivity is only 1/3 of that of corundum. It is a new type of high-quality thermal insulation raw material that has emerged in recent years. CA6 castable uses CA6 as aggregate, and the matrix part is made of plate-shaped corundum fine powder, alumina powder and calcium aluminate cement as binders. The volume density of spherical lightweight mullite particles is 1.59g·cm⁻³, and the apparent porosity is 38.9%. Lightweight mullite castables are made of microporous M70 spherical lightweight mullite balls as aggregates, and the matrix part is made of plate-shaped corundum fine powder, alumina powder and calcium aluminate cement as binders to ensure good resistance to slag erosion and improve the safety of the permanent layer.

At the same time, it has better thermal insulation and corrosion resistance than conventional high-aluminum castables, which can protect the insulation material and keep the ladle in good thermal insulation during the furnace service period.

The ladle permanent layer castable has the following advantages: good fluidity, suitable solidification time; labor-saving, fast and convenient; high strength, long life; good thermal insulation performance, high temperature resistance, corrosion resistance and thermal shock resistance.

Main physical and chemical indicators of ladle permanent layer castable

name		High strength and high thermal insulation mullite castable	Heavy castables for permanent layer of ladle
Brand		HX-LW1.5	HX-GBSF65	HX-GBSF70
chemical composition ( % ) ;≥	Al₂O₃	55	65	70
chemical composition (g/cm³);≥		1.6	2.35	2.4
Compressive strength (MPa);≥	110℃×16h	10	30	35
	1500℃×3h	15	45	50
Flexural strength(MPa);≥	110℃×16h	-	6	6
	1500℃×3h	-	8	8
Post-burn line changes (%);	1500℃×3h	±1.0	±0.5	±0.5

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