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A super high temperature anti-skinning castable

An anti-skin and castable technology, applied in the field of castables, can solve problems such as uncontrollable coagulation of silica sol, and achieve the effects of superior anti-skin performance, increased molecular weight, and improved thermal stability.

Active Publication Date: 2019-11-12
ANHUI RUITAI NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If simply adding aluminate cement to solidify, the silica sol will coagulate uncontrollably, so that it cannot be formed into a dense lining

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An ultra-high temperature anti-skinning castable proposed by the present invention, its raw materials include by weight: 25 parts of corundum with a particle size of 5-1 mm, 20 parts of silicon carbide with a particle size of 5-1 mm, and a particle size of 1-0.088 5 parts of corundum, 26 parts of corundum with particle size <0.088mm, 2 parts of alumina micropowder, 6 parts of silica fume, 1 part of aluminate cement, 0.3 part of decoagulant, 0.005 part of retarder, 6 parts of silica sol , 1 part of water.

Embodiment 2

[0030] A kind of ultra-high temperature anti-skinning castable proposed by the present invention, its raw material comprises by weight: particle diameter is 40 parts of bauxite of 5-1mm, particle diameter is 10 parts of silicon carbide of particle diameter of 5-1mm, particle diameter is 1- 15 parts of 0.088mm bauxite, 10 parts of corundum with particle size <0.088mm, 8 parts of alumina micropowder, 2 parts of silica fume, 6 parts of aluminate cement, 0.1 part of decoagulant, 0.05 part of retarder, silica sol 1 part, 6 parts of water.

Embodiment 3

[0032] A kind of ultra-high temperature anti-skinning castable proposed by the present invention, its raw material comprises by weight: 32 parts of sintered corundum with a particle diameter of 5-1mm, 14 parts of silicon carbide with a particle diameter of 5-1mm, 1- 12 parts of 0.088mm bauxite, 15 parts of fused corundum with a particle size of <0.088mm, 6 parts of alumina micropowder, 4.8 parts of silica fume, 3 parts of pure aluminate cement, 2 parts of high alumina cement, and 0.2 parts of decoagulant , 0.03 parts of retarder, 2 parts of silica sol, 5 parts of water, 0.1 part of silicon carbide with a particle size of 1-0.088mm, 15 parts of silicon carbide with a particle size of <0.088mm, and 0.1 part of a water reducer;

[0033] Wherein, the decoagulant is a mixture of sodium hexametaphosphate and sodium pyrophosphate in a weight ratio of 3:2;

[0034] Described set retarder is the mixture of tartaric acid, oxalic acid, maleic acid by weight ratio of 5:3:4;

[0035] The ...

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Abstract

The invention discloses a superhigh temperature anti-skinning castable. The castable comprises the following raw materials in parts by weight: 25-40 parts of corundum or alumina whose particle size is 5-1mm, 10-20 parts of silicon carbide whose particle size is 5-1mm, 5-15 parts of corundum or alumina whose particle size is 1-0.088mm, 10-26 parts of corundum whose particle size is less than 0.088mm, 2-8 parts of aluminum oxide micro powder, 2-6 parts of silica fume, 1-6 parts of aluminate cement, 0.1-0.3 parts of a decondensation agent, 0.005-0.05 parts of a retarder, 1-6 parts of silica sol, and 1-6 parts of water. The superhigh temperature anti-skinning castable has the advantages of good shaping performance and solidification performance, and after solidification, the castable has good high temperature resistance, erosion resistance, and thermal shock resistance.

Description

technical field [0001] The invention relates to the technical field of castables, in particular to an ultra-high temperature anti-skinning castable. Background technique [0002] Generally, refractory castables with CaO content <0.2% are cement-free refractory castables; refractory castables with CaO content of 0.2-1.0% are ultra-low cement refractory castables; refractory castables with CaO content of 1.0-2.5% are low-cement refractory castables ; CaO content> 2.5% refractory castable ordinary cement combined refractory castable. For cement-bonded refractory castables, the role of cement is crucial. The addition of aluminate cement plays an important role in the forming, setting, hardening, curing, drying, heating, sintering of refractory castables, and the final performance or service life of refractory castables. [0003] The reason why low-cement castables are widely used is that the material has good comprehensive properties. For example, when the content of Ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/101
CPCC04B35/101C04B2235/3222C04B2235/3418C04B2235/3826C04B2235/447C04B2235/449C04B2235/96
Inventor 董舜杰张金龙汪雷洪绍松
Owner ANHUI RUITAI NEW MATERIALS TECH
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