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Anti-hydration magnesia castable

A magnesia castable and hydration-resistant technology, applied in the field of castables, can solve problems such as poor hydration resistance and easy cracking, and achieve the effect of improving strength, reducing the possibility of cracking, and good high temperature performance

Inactive Publication Date: 2015-12-09
赵彬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnesium castables in the prior art have poor hydration resistance and are prone to cracking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A hydration-resistant magnesium castable, comprising the following components and the ratio of each component is: magnesia: 25 parts, spinel: 15 parts, corundum: 15 parts, calcium aluminate cement: 5 parts, dioxide Silica powder: 2 parts, graphite: 1 part, sodium hexametaphosphate: 3 parts, boric acid: 4 parts, oxalic acid: 2 parts, calcium oxide: 3 parts, boron oxide: 5 parts, nickel oxide: 2 parts, organic fiber: 15 parts, metal aluminum powder: 0.1 part, organosilane: 3 parts, nano-magnesium carbonate: 5 parts, the particle diameter of magnesia is 3mm, and the particle diameter of corundum is 2mm, and described corundum adopts tabular corundum, and magnesia is from The sintered magnesia produced by extracting from seawater contains 95-99.5% MgO in the magnesia, and the bulk density of the magnesia is 3.30-3.45g / cm 3 , the organic fiber is poly-p-phenylene benzobisoxazole fiber.

Embodiment 2

[0015] A hydration-resistant magnesium castable, comprising the following components and the ratio of each component is: magnesia: 30 parts, spinel: 18 parts, corundum: 19 parts, calcium aluminate cement: 7 parts, dioxide Silica powder: 6 parts, graphite: 4 parts, sodium hexametaphosphate: 7 parts, boric acid: 6 parts, oxalic acid: 4 parts, calcium oxide: 6 parts, boron oxide: 8 parts, nickel oxide: 5 parts, organic fiber: 19 parts, metal aluminum powder: 0.5 part, organosilane: 6 parts, nano-magnesium carbonate: 8 parts, the particle diameter of magnesia is 8mm, and the particle diameter of corundum is 4mm, and described corundum adopts tabular corundum, and magnesia is from The sintered magnesia produced by extracting from seawater contains 95-99.5% MgO in the magnesia, and the bulk density of the magnesia is 3.30-3.45g / cm 3 , The organic fiber is poly-p-benzimidazole fiber.

Embodiment 3

[0017] A hydration-resistant magnesium castable, comprising the following components and the ratio of each component is: magnesia: 35 parts, spinel: 25 parts, corundum: 25 parts, calcium aluminate cement: 10 parts, dioxide Silica powder: 8 parts, graphite: 5 parts, sodium hexametaphosphate: 10 parts, boric acid: 9 parts, oxalic acid: 6 parts, calcium oxide: 9 parts, boron oxide: 10 parts, nickel oxide: 8 parts, organic fiber: 25 parts, metal aluminum powder: 2 parts, organosilane: 10 parts, nano-magnesium carbonate: 15 parts, the particle diameter of magnesia is 10mm, and the particle diameter of corundum is 5mm, and described corundum adopts tabular corundum, and magnesia is from The sintered magnesia produced by extracting from seawater contains 95-99.5% MgO in the magnesia, and the bulk density of the magnesia is 3.30-3.45g / cm 3 , the organic fiber is poly-p-phenylene benzobisoxazole fiber.

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PUM

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Abstract

The invention discloses an anti-hydration magnesia castable, which includes following components: 25-35 parts of magnesite, 15-25 parts of spinel, 15-25 parts of corundum, 5-10 parts of calcium aluminate cement, 2-8 parts of silicon dioxide micro-powder, 1-5 parts of graphite, 3-10 parts of sodium hexametaphosphate, 4-9 parts of boric acid, 2-6 parts of oxalic acid, 3-9 parts of calcium oxide, 5-10 parts of boron oxide, 2-8 parts of nickel oxide, 15-25 parts of organic fibers and 0.1-3 parts of metallic aluminum powder. The magnesia castable has an excellent anti-hydration property.

Description

【Technical field】 [0001] The invention relates to the technical field of castables. 【Background technique】 [0002] Castable, also known as refractory castable, is a granular and powdery material made of refractory material with a certain amount of binder. It has high fluidity and is an amorphous refractory material formed by casting. Compared with other unshaped refractory materials, the binder and moisture content are higher, and the fluidity is better, so the application range of the castable is wider, and the materials and binders used can be selected according to the conditions of use. It can be directly poured into a lining body, and can also be used as a prefabricated block by pouring or shaking. The magnesia castables in the prior art have poor hydration resistance and are prone to cracking. 【Content of invention】 [0003] The purpose of the present invention is to solve the problems in the prior art, and propose a hydration-resistant magnesium castable, which ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 赵彬
Owner 赵彬
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