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Multiphase gradient furnace door brick of box-type resistance furnace and manufacturing method

A box-type resistance furnace, technology of manufacturing methods, applied in the direction of furnace, furnace components, furnace types, etc., can solve the problem of light clay bricks with poor mechanical strength, wear resistance and slag erosion resistance, unsuitable for load-bearing structures and direct contact with melting Solve the problems of slag molten metal and other problems, and achieve the effects of improving thermal shock resistance, improving compressive strength at room temperature, and reducing bulk density

Pending Publication Date: 2020-05-29
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical strength, wear resistance and slag erosion resistance of lightweight clay bricks are poor, and they are not suitable for the load-bearing structure of the kiln and the direct contact with slag, furnace charge, molten metal and other parts.

Method used

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  • Multiphase gradient furnace door brick of box-type resistance furnace and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Premix 65kg of alumina hollow spheres, 34kg of alumina powder and 1kg of foaming agent in a mixer for 10 minutes to obtain premixed material 1; premix 45kg of light clinker, 45kg of plastic clay and 10kg of foaming agent in a mixer 10min to obtain premix material 2; mix premix material 1 with 5kg of water and continue to stir for 30min to obtain castable material 1; mix premix material 2 with 5kg of water and continue to stir for 30min to obtain castable material 2; The pouring method is to pour castable material 1 to 1 / 2 of the mold volume, then pour castable material 2 to fill the entire mold, and demould after curing for 24 hours to obtain a complex phase gradient furnace door brick body; the complex phase gradient furnace door brick body The body was dried at 110°C for 24 hours to obtain a dry multi-phase gradient furnace door brick body; the dried multi-phase gradient furnace door brick body was kept at 1000°C for 1 hour, and continued to heat up to 1350°C for anoth...

Embodiment 2

[0026] Premix 64.5kg of alumina hollow spheres, 34kg of alumina powder and 1.5kg of foaming agent in a mixer for 10 minutes to obtain premixed material 1; mix 48kg of light clinker, 37kg of plastic clay and 15kg of foaming agent in a mixer Premix for 10 minutes to get premixed material for two years; mix premixed material 1 with 5kg of water and continue stirring for 30 minutes to obtain castable material 1; mix premixed material 2 with 5kg of water and continue to stir for 30 minutes to obtain castable material 2 ;In the way of vibrating pouring, castable one is poured to 1 / 2 of the mold volume, and then castable two is poured to fill the entire mold, and after 24 hours of curing, the mold is demoulded to obtain a complex-phase gradient furnace door brick body; the complex-phase gradient The furnace door brick body was dried at 110°C for 24 hours to obtain a dry multiphase gradient furnace door brick body; the dried multiphase gradient furnace door brick body was kept at 1000°...

Embodiment 3

[0029] Premix 65kg of alumina hollow spheres, 33.5kg of alumina powder and 1.5kg of foaming agent in a mixer for 10 minutes to obtain premixed material 1; mix 55kg of light clinker, 30kg of plastic clay and 15kg of foaming agent in a mixer Premixed for 10 minutes to obtain premixed material 2; mixed premixed material 1 with 5 kg of water and continued to stir for 30 minutes to obtain castable material 1; mixed premixed material 2 with 5 kg of water and continued to stir for 30 minutes to obtain castable material 2; In the way of vibrating pouring, castable one is poured to 1 / 2 of the mold volume, and then castable two is poured to fill the entire mold, and after 24 hours of curing, the mold is demoulded to obtain a complex-phase gradient furnace door brick body; the complex-phase gradient furnace Dry the door brick body at 110°C for 24 hours to obtain a dry multi-phase gradient furnace door brick body; keep the dried multi-phase gradient furnace door brick body at 1000°C for 1 ...

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Abstract

The invention relates to a multiphase gradient furnace door brick of a box-type resistance furnace and a manufacturing method. Aluminum oxide hollow spheres, aluminum oxide powder, a light clinker, plastic clay and a foaming agent are used as raw materials, a box-type resistance furnace multiphase gradient furnace door green brick body is obtained through mixing, forming and drying, finally, the green brick body is placed in a high-temperature electric furnace to be sintered, the sintering temperature is 1200-1350 DEG C, and heat preservation is conducted for 2-6 hours. Characteristics of twodifferent castables are effectively combined, and on the basis of high temperature resistance, mechanical properties and thermal shock resistance stability of the furnace door brick are improved.

Description

technical field [0001] The invention relates to the field of kiln design, in particular to a multi-phase gradient furnace door brick of a box-type resistance furnace and a manufacturing method thereof. Background technique [0002] At present, high-temperature-resistant lightweight materials are the top priority of domestic and foreign scholars' research. In recent years, they have made great progress, but they still face problems such as high price and cumbersome production process when they are used in production practice. [0003] Alumina hollow ball brick is a new type of high temperature insulation material with a maximum service temperature of 1800°C. The product has high mechanical strength, which is several times that of general light products, and its volume density is only half of that of corundum products. The performance is average. Lightweight clay bricks are generally used in the heat insulation of industrial kilns according to their performance characteristics...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622C04B38/10F27B17/00F27D1/06
CPCC04B35/10C04B35/622C04B38/10F27B17/00F27D1/06C04B2235/349C04B2235/656C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607C04B38/0067
Inventor 罗旭东李季佳
Owner UNIV OF SCI & TECH LIAONING
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