Sintered refractory brick and making method thereof

A technology of refractory bricks and quartz powder is applied in the field of refractory materials, which can solve the problems affecting the service life and application fields of refractory bricks, high thermal conductivity of refractory bricks, insufficient thermal shock resistance, etc., and achieves significant thermal insulation effect and reduces thermal conductivity. , The effect of improving compressive strength and thermal shock resistance

Inactive Publication Date: 2017-11-10
HEFEI MINGYOU HIGH TEMPERATURE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of clay refractory brick requires high temperature, high energy consumption, long burning time and high production cost. The finished refractory brick has high thermal conductivity, poor heat insulation performance and low compressive strength. High, its compressive strength gradually decreases, and its thermal shock resistance is insufficient, which in turn affects the service life and application fields of refractory bricks

Method used

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  • Sintered refractory brick and making method thereof
  • Sintered refractory brick and making method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A kind of sintered refractory brick, the following raw materials are prepared to be prepared: 30kg of modified quartz powder, 25kg of magnesite slag, 15kg of dolomite powder, 15kg of bauxite, 10kg of diopside powder, 5kg of milk of lime, 6kg of expanded graphite, 3kg of niobium carbide powder, Boron nitride powder 3kg, silicon phosphide powder 3kg, silicon carbide fiber 4kg, activator 1kg, water reducing agent 1kg, foaming agent 1kg and foam stabilizer 1kg;

[0025] The modified quartz powder is prepared by the following steps: Weigh 30kg of quartz sand, soak it in a mixed solution of sodium carbonate and potassium permanganate for 2 hours, take it out and dry it, and add silane coupling agent KH550 equivalent to 2% of the weight of the quartz sand 1. The polyphenylene sulfone resin equivalent to 3% of the turbidite weight and the alumina equivalent to 1% of the quartz powder weight are stirred at 300r / min for 15min and ground after 70 mesh sieves to obtain the required ...

Embodiment 2

[0034] A kind of sintered refractory brick, the following raw materials are prepared to be prepared: 35kg of modified quartz powder, 30kg of magnesite slag, 20kg of dolomite powder, 20kg of bauxite, 15kg of diopside powder, 10kg of milk of lime, 9kg of expanded graphite, 5kg of niobium carbide powder, Boron nitride powder 5kg, silicon phosphide powder 5kg, silicon carbide fiber 6kg, activator 3kg, water reducing agent 2kg, foaming agent 3kg and foam stabilizer 3kg;

[0035] The modified quartz powder is prepared through the following steps: Weigh 35kg of quartz sand, put it into a mixed solution of sodium carbonate and potassium permanganate and soak it for 2.5 hours, take it out and dry it, and add a silane coupling agent equivalent to 3% of the weight of the quartz sand KH550, the polyphenylene sulfone resin equivalent to 4% of turbidite weight and the alumina equivalent to 2% of quartz powder weight are ground at 400r / min after stirring for 20min, and the required raw materi...

Embodiment 3

[0044]A kind of sintered refractory brick, the following raw materials are prepared to be prepared: 40kg of modified quartz powder, 35kg of magnesite slag, 25kg of dolomite powder, 25kg of bauxite, 20kg of diopside powder, 15kg of milk of lime, 12kg of expanded graphite, 7kg of niobium carbide powder, Boron nitride powder 7kg, silicon phosphide powder 7kg, silicon carbide fiber 8kg, activator 5kg, water reducing agent 3kg, foaming agent 5kg and foam stabilizer 5kg;

[0045] The modified quartz powder is prepared through the following steps: Weigh 40kg of quartz sand, soak it in a mixed solution of sodium carbonate and potassium permanganate for 3 hours, take it out and dry it, and add silane coupling agent KH550 equivalent to 4% of the weight of the quartz sand , the polyphenylene sulfone resin that is equivalent to 5% of turbidite weight and the aluminum oxide that is equivalent to 3% of quartz powder weight are ground after stirring 25min under 500r / min, cross 90 mesh sieves ...

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Abstract

The invention discloses a sintered refractory brick and a making method thereof, and relates to the field of refractory materials. The refractory brick comprise modified quartz powder, magnesite slag, dolomite powder, bauxite, diopside powder, lime milk, expanded graphite, niobium carbide powder, boron nitride powder, silicon phosphide powder, silicon carbide fibers, an activator, a water reducer, foaming agent and a foam stabilizer. The refractory brick is made through mix-grinding, standing ageing, drying and calcination of the above raw materials. The making method of the refractory brick has the advantages of simplicity, low energy consumption during production, and short time; and the refractory brick produced in the invention has the advantages of high compressive strength, excellent thermal shock resistance, low thermal conductivity, effectively prolonged service life in a high temperature furnace and a kiln, and suitableness for being promoted and applied.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a sintered refractory brick and a preparation method thereof. Background technique [0002] Refractories are important basic materials in the industrial field. At present, industrial furnaces and their inner linings for steel smelting, coke, and mechanical heat treatment systems all require refractory materials. A large number of refractory bricks are required for the furnace and inner lining. Most of the refractory bricks are sticky heat-insulating refractory bricks, and clay bricks are mainly composed of mullite (25% to 50%), glass phase (25% to 60%), cristobalite and quartz (up to 30%) . Usually hard clay is used as raw material, the clinker is calcined in advance, and then soft clay is mixed with it, and it is molded by semi-dry method or plastic method, and the clay brick product is fired at 1300-1400C. A small amount of water glass, cement and other binders can also be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B38/02C04B38/10
CPCC04B35/66C04B35/62204C04B38/02C04B38/10C04B2235/3208C04B2235/321C04B2235/3217C04B2235/3418C04B2235/3445C04B2235/3454C04B2235/38C04B2235/3839C04B2235/386C04B2235/425C04B2235/5244C04B2235/6562C04B2235/6567C04B2235/96C04B2235/9607
Inventor 王虎
Owner HEFEI MINGYOU HIGH TEMPERATURE TECH CO LTD
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