Casting material

A technology for castables and raw materials, applied in the field of refractory materials, can solve problems such as unfavorable high-temperature mechanical properties of castables, and achieve the effects of increasing thermal flexural strength and mechanical properties, increasing bonding, and increasing adhesion.

Active Publication Date: 2017-10-24
河北友同科力耐火材料制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: for the CaO introduced by cement in the current clay-bonded castable and the Al in the castable 2 o 3 and SiO 2 The reaction produces anorthite and other low-melting point minerals, which is not conducive to the high-temperature mechanical properties of the castable. The invention provides a castable

Method used

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  • Casting material

Examples

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preparation example Construction

[0018] Preparation of additives: Put magnesia and yttrium oxide in a mill at a mass ratio of 3:2-3, grind at 600r / min for 20-25min, collect the milled material, and then mass ratio 4-6: 1~3: 1~3, put the grinding material, strontium carbonate and boron carbide into the stirring mixer, stir at 300r / min for 10~15min, and then the additive can be obtained.

[0019] The casting material of the present invention includes the following raw materials in parts by weight, 40-45 parts of mullite, 20-25 parts of quartz stone, 8-12 parts of blast furnace slag, 5-8 parts of additives, 4-7 parts of barium feldspar, 3-5 parts of water reducer, 2-4 parts of adhesive, 1-2 parts of auxiliary additives.

[0020] The water reducing agent is any one of sodium pyrophosphate, magnesium lignosulfonate or sodium methacrylic sulfonate, the binder is calcium aluminate cement, and the auxiliary additive is polydimethylsiloxane.

example 1

[0022] Preparation of additives: Put magnesia and yttrium oxide in a mill at a mass ratio of 3:3, grind at 600r / min for 25min, collect the ground material, and then grind at a mass ratio of 6:3:3. Put the ground material, strontium carbonate and boron carbide into a stirring mixer, and stir at 300r / min for 15min to obtain the additive.

[0023] The castable of the present invention includes the following raw materials in parts by weight, 42 parts of mullite, 22 parts of quartz stone, 10 parts of blast furnace slag, 7 parts of additives, 6 parts of feldspar, 4 parts of water reducing agent, and 3 parts of binder , 2 parts of auxiliary additives.

[0024] The water reducing agent is any one of sodium pyrophosphate, magnesium lignosulfonate or sodium methacrylate, the binder is calcium aluminate cement (Zhengzhou Jinshi Refractory Co., Ltd.), and the auxiliary additive is polydimethyl base siloxane.

example 2

[0026] Preparation of additives: Put magnesia and yttrium oxide in a mill at a mass ratio of 3:3, grind at 600r / min for 25min, collect the ground material, and then grind at a mass ratio of 6:3:3. Put the ground material, strontium carbonate and boron carbide into a stirring mixer, and stir at 300r / min for 15min to obtain the additive.

[0027] The castable of the present invention includes the following raw materials in parts by weight, 45 parts of mullite, 25 parts of quartz stone, 12 parts of blast furnace slag, 8 parts of additives, 7 parts of barium feldspar, 5 parts of water reducer, 4 parts of adhesive agent, 2 auxiliary additives.

[0028] The water reducer is sodium pyrophosphate, the binder is calcium aluminate cement (Yangquan Tianlong Engineering Materials Co., Ltd.), and the auxiliary additive is polydimethylsiloxane.

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Abstract

The invention relates to a casting material, and belongs to the technical field of refractory materials. The casting material is prepared from the following raw materials: mullite, quartzite, blast furnace slag, additive, baryta feldspar, water reducer, adhesive and auxiliary additives, wherein the additive is prepared by the following steps: grinding magnesium oxide and yttrium oxide in a grinding machine, collecting the ground material, and uniformly stirring the ground material, strontium carbonate and boron carbide to obtain the additive. According to the casting material, mullite with low expansion coefficient is used as a base material to prevent the casting material from expanding when the casting material is heated and prevent influence to application of the casting material; and strontium carbonate and boron carbide are added into the additive, the strontium carbonate is decomposed at high temperature to form strontium oxide, and the strontium oxide is combined with silicon dioxide in the raw materials, so that the temperature resistance of the casting material is improved, and the binding performance of the additive and the base material is improved; and boron-yttrium alloy is formed from the boron carbide and yttrium oxide, so that the temperature resistance and mechanical performance are improved.

Description

technical field [0001] The invention relates to a pouring material, which belongs to the technical field of refractory materials. Background technique [0002] With the development of society, energy saving and consumption reduction have attracted more and more attention. The pusher type heating furnace is one of the main types of steel rolling heating furnaces. The adoption of water-free cooling technology reduces the energy consumption of the heating furnace, saves energy, and reduces the gas waste generated by fuel combustion. The development of this technology has attracted widespread attention. . The heating furnace using water-free cooling technology puts forward higher technical requirements for the castables used, requiring the castables to have better thermal flexural strength and high-temperature mechanical properties. At present, the castables for the working lining of the heating furnace mainly include clay-bonded castables, low-cement, ultra-low-cement and cem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 高俊薛焱璟王磊
Owner 河北友同科力耐火材料制造有限公司
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