High-alumina refractory castable and preparation method thereof

A refractory castable, high-aluminum technology, applied in the field of refractory materials, can solve the problem of low strength of the castable, and achieve the effects of low thermal conductivity, light weight and stable volume

Inactive Publication Date: 2018-05-18
黎文泰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the castable obtained in this patent has low strength

Method used

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  • High-alumina refractory castable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A high-alumina refractory castable made of the following raw materials in parts by weight:

[0029] 50 parts of high alumina bauxite, 8 parts of andalusite, 11 parts of floating beads, 15 parts of silicon carbide, 10 parts of silicon nitride, α-Al 2 o 3 7 parts of fine powder, 3 parts of aluminum silicate gel powder, 1 part of attapulgite clay, 10 parts of calcium aluminate cement; plus 0.1% of the total weight of the above raw materials and 0.05% of the total weight of aluminum silicate fiber .

[0030] Preferably, Al in the high alumina bauxite 2 o 3 Content ≥ 80%, particle size distribution: 10-5mm accounted for 20%, 5-3mm accounted for 18%, 3-1mm accounted for 37%, 1-0mm accounted for 25%.

[0031] Preferably, the particle size of the andalusite is ≤1mm.

[0032] Preferably, the particle size of the silicon carbide is ≤0.074mm.

[0033] Preferably, the particle size of the silicon nitride is ≤0.074mm.

[0034] Preferably, the α-Al 2 o 3 The particle size of...

Embodiment 2

[0044]A high-alumina refractory castable made of the following raw materials in parts by weight:

[0045] 53 parts of high alumina bauxite, 8.5 parts of andalusite, 12 parts of floating beads, 15.4 parts of silicon carbide, 10.5 parts of silicon nitride, α-Al 2 o 3 8 parts of micropowder, 4 parts of aluminum-silica gel powder, 1.5 parts of attapulgite clay, 11 parts of calcium aluminate cement; add water reducing agent accounting for 0.12% of the total weight of the above raw materials and aluminum silicate fiber accounting for 0.05% of the total weight of the above raw materials .

[0046] Preferably, Al in the high alumina bauxite 2 o 3 The content is ≥80%, and the particle size distribution is: 10-5mm accounts for 22%, 5-3mm accounts for 20%, 3-1mm accounts for 35%, and 1-0mm accounts for 23%.

[0047] Preferably, the particle size of the andalusite is ≤1mm.

[0048] Preferably, the particle size of the silicon carbide is ≤0.074mm.

[0049] Preferably, the particle si...

Embodiment 3

[0060] A high-alumina refractory castable made of the following raw materials in parts by weight:

[0061] 55 parts of high alumina bauxite, 9 parts of andalusite, 13 parts of floating beads, 16 parts of silicon carbide, 11 parts of silicon nitride, α-Al 2 o 3 9 parts of micropowder, 5.5 parts of aluminum silicate gel powder, 2 parts of attapulgite clay, 13 parts of calcium aluminate cement; add water reducing agent accounting for 0.15% of the total weight of the above raw materials and aluminum silicate fiber accounting for 0.06% of the total weight of the above raw materials .

[0062] Preferably, Al in the high alumina bauxite 2 o 3 Content ≥ 80%, particle size distribution: 10-5mm accounted for 23%, 5-3mm accounted for 15%, 3-1mm accounted for 40%, 1-0mm accounted for 22%.

[0063] Preferably, the particle size of the andalusite is ≤1mm.

[0064] Preferably, the particle size of the silicon carbide is ≤0.074mm.

[0065] Preferably, the particle size of the silicon ni...

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Abstract

The invention belongs to the technical field of refractory materials, in particular to a high-alumina refractory castable and a preparation method thereof. The high-alumina refractory castable is prepared from the following raw materials in parts by weight: 50-70 parts of high bauxite, 8-13 parts of andalusite, 11-23 parts of floating bead, 15-20 parts of silicon carbide, 10-15 parts of silicon nitride, 7-12 parts of alpha-Al2O3 micro powder, 3-9 parts of silica-alumina colloid powder, 1-5 parts of attapulgite clay, 10-25 parts of calcium aluminate cement, water reducer and aluminium silicatefiber, wherein the water reducer occupies 0.1-0.3% of total mass of the above raw materials, and the aluminium silicate fiber occupies 0.05-0.12% of total mass of the above raw materials. The high-alumina refractory castable has the advantages of high Al2O3 content, light weight, low heat conductivity and high castable strength.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a high-aluminum refractory castable and a preparation method thereof. Background technique [0002] High-alumina refractory castables are refractory castables made of high-alumina raw materials as aggregates and powders, and added with binders. They have high mechanical strength, good thermal shock resistance, and abrasion resistance. They are mainly used as Lining of various kilns such as boilers, blast furnace hot blast stoves, heating furnaces, ceramic kilns, etc. However, the existing high-aluminum refractory castables have limited their applications due to their low strength and high thermal conductivity. [0003] The Chinese patent with the notification number CN105218128B discloses a high-alumina thermal insulation castable, which includes the following components and the mass ratio of each component is: fused dense corundum 30-50, brown corundum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/101C04B35/622
CPCC04B35/101C04B35/622C04B2235/3222C04B2235/3463C04B2235/349C04B2235/3826C04B2235/3873C04B2235/5232C04B2235/6022C04B2235/77C04B2235/96C04B2235/9607C04B2235/9615
Inventor 黎文泰
Owner 黎文泰
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