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Binder for monolithic refractory material and preparation method thereof

A technology of refractory materials and binders, which is applied in the field of binder preparation, can solve the problems of low thermal strength and poor slag resistance, and achieve the effects of improving performance, reducing the risk of bursting, and saving baking costs

Active Publication Date: 2015-08-19
湖北斯曼新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, in some harsh high-temperature smelting environments, aluminate cement-bonded refractory materials still have the problems of low hot strength and poor slag resistance

Method used

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  • Binder for monolithic refractory material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The mass fraction is 50% of aluminum oxide and 40% of magnesium oxide and 10% of the activator by ball mill grinding for 30 minutes, the mass fraction of metasilicate in the activator mixture is 80%, polycarboxylic acid in the activator mixture The mass fraction of silicon is 10%, and the mass fraction of elemental silicon in the activator mixture is 10%; obtain a binder for amorphous refractories with a median particle size of 8 microns and a 90 micron sieve of 2.5%.

Embodiment 2

[0022] The mass fraction is 60% of aluminum oxide and 35% of magnesium oxide and 5% of the activator by ball mill grinding for 30 minutes, the mass fraction of metasilicate in the activator mixture is 60%, polycarboxylic acid in the activator mixture The mass fraction of silicon is 30%, and the mass fraction of elemental silicon in the activator mixture is 10%; obtain a binder for amorphous refractories with a median particle size of 5 microns and a 90 micron sieve of 1%.

Embodiment 3

[0024] The mass fraction is 40% of aluminum oxide and 40% of magnesium oxide and 20% of the activator by ball mill grinding for 30 minutes, the mass fraction of metasilicate in the activator mixture is 40%, polycarboxylic acid in the activator mixture The mass fraction of silicon is 40%, and the mass fraction of elemental silicon in the activator mixture is 20%; obtain a binder for amorphous refractories with a median particle size of 14 microns and a 90 micron sieve of 4%.

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Abstract

The present invention discloses a binder for an unshaped proof-fire material, and a preparation method thereof. The raw materials of the binder comprise, by mass, 30-70% of alumina, 20-60% of magnesium oxide, and 5-20% of an activator, wherein the activator is a mixture of 40-80% by mass of metasilicic acid, 0-40% by mass of polycarboxylic acid and 0-50% by mass of elemental silicon. According to the present invention, under the effect of the activator, alumina and magnesium oxide in the micro-powder raw material can be subjected to controllable and rapid condensation in the aqueous solution to produce the binding strength so as to well solve the defect of the aluminate cement binding agent and improve the performance of the unshaped proof-fire material.

Description

technical field [0001] The invention relates to a preparation method of a binder, in particular to a binder for monolithic refractory materials and a preparation method thereof. Background technique [0002] Aluminate cement has a history of more than 100 years as a binder for monolithic refractory materials, and is currently the most widely used binder. The bonding mechanism is hydration bonding, that is, through the hydration reaction between aluminate cement and water, a hydrated mineral phase (CaAl 2 o 4 ·xH 2 O) to provide a combination function. Its representative reaction equation is as follows: [0003] CaAl 2 o 4 +10H 2 O=CaAl 2 o 4 10H 2 o [0004] In the application of amorphous refractory materials, this combination method has its limitations. The bound water in the hydration product will vaporize and dehydrate rapidly when it encounters high temperature, which will destroy the microstructure of the refractory material in the lightest case, and cause t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B7/00
Inventor 刘学新陈士华祝显超
Owner 湖北斯曼新材料股份有限公司
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