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Magnesium light-weight refractory material and preparation method thereof

A refractory material and lightweight technology, applied in the field of refractory material production, can solve the problems of low thermal conductivity, high corrosion resistance, etc., achieve high strength and high temperature performance, and a wide range of adjustable product performance

Inactive Publication Date: 2016-07-20
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fabrication of magnesium lightweight refractories with gradient density by magnesia carbothermal reduction transport oxidation combined with reaction sintering to solve the contradiction between high erosion resistance and low thermal conductivity

Method used

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  • Magnesium light-weight refractory material and preparation method thereof
  • Magnesium light-weight refractory material and preparation method thereof
  • Magnesium light-weight refractory material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Mix 180 mesh fused magnesia fine powder and 180 mesh graphite fine powder evenly according to the molar ratio of MgO and C 3:1. The fused magnesia particles of 1-3 mm and 0.1-1 mm are used as coarse particles and medium particles respectively. Magnesia fine powder and graphite fine powder are used as the matrix part, and the ratio of coarse particles: medium particles: fine powder is 40:20:40. Use phenolic resin ethylene glycol solution as a binder, and the addition amount is 8% of the total weight of the ingredients. The mixing in the ingredients is to add the aggregate part and mix for 5 minutes, then add the phenolic resin ethylene glycol dilution and mix for 5 minutes, and then add For the fine powder part, mix for 20 minutes, and place the mixed material in an airtight container or plastic bag for 2 hours; after being trapped, the material is molded on a hydraulic press with a semi-dry method, and the molding pressure is 150 MPa. The formed sample is naturally cool...

Embodiment 2

[0035]Mix 180 mesh fused magnesia fine powder and 180 mesh graphite fine powder evenly according to the molar ratio of MgO and C 3:1. The 1-3mm and 0.1-1mm lightweight magnesia particles are respectively used as coarse particles and medium particles. Magnesia fine powder and graphite fine powder are used as the matrix part, and the ratio of coarse particles: medium particles: fine powder is 40:20:40. Use phenolic resin ethylene glycol solution as a binder, and the addition amount is 8% of the total weight of the ingredients. The mixing in the ingredients is to add the aggregate part and mix for 3 minutes, then add the phenolic resin ethylene glycol dilution and mix for 5 minutes, and then add For the fine powder part, mix for 20 minutes, and place the mixed material in an airtight container or a plastic bag for 6 hours; the material after being trapped is molded on a hydraulic press with a semi-dry method, and the molding pressure is 150MPa. Cool for half a day to 1 day, then...

Embodiment 3

[0039] Mix 180 mesh fused magnesia fine powder and 180 mesh graphite fine powder evenly according to the molar ratio of MgO and C 4:1. The 1-3mm and 0.1-1mm lightweight magnesia particles are respectively used as coarse particles and medium particles. Magnesia fine powder and graphite fine powder are used as the matrix part, and the ratio of coarse particles: medium particles: fine powder is 40:20:40. With the phenolic resin ethylene glycol solution as the binding agent, the addition amount is 8% of the total weight of the batching. The mixing in the batching is to add the aggregate part and mix for 5 minutes, then add the phenolic resin ethylene glycol dilution and mix for 5 minutes, and then Add the fine powder part, mix for 20 minutes, put the mixed material in an airtight container or a plastic bag and trap it for 2 hours; the trapped material is molded on a hydraulic press with a semi-dry method, the molding pressure is 150MPa, and the formed sample Naturally cool for ha...

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Abstract

The invention discloses a magnesium light-weight refractory material and a preparation method thereof. The prepared magnesium light-weight refractory material is characterized in that the appearance is dense, a plurality of pores are formed in the material, the density gradient and bonding strength gradient of a matrix part are formed, and the low heat conduction and anti-permeation properties are well realized. The preparation method comprises the following steps of using magnesia and carbon as reaction materials, pressing and forming in an atmosphere sintering furnace, vacuumizing the controllable atmosphere sintering furnace, charging Ar (argon) to perform a protection function, heating the furnace to certain temperature, introducing O2 (oxygen), enabling the magnesia and the carbon to generate the carbothermal reduction reaction, generating Mg (magnesium) steam, diffusing the Mg steam, reacting with the introduced O2 to generate magnesium oxide, oxidizing the generated magnesium oxide, and bonding the matrix part of a specimen. The magnesium light-weight refractory material and the preparation method have the characteristics that the sintering temperature is lower, the porosity and volume density of the specimen are adjustable, and the compression strength and refractoriness under load are higher.

Description

technical field [0001] The invention relates to the technical field of refractory production, in particular to a magnesia (periclase as the main crystal phase) lightweight refractory and a preparation method thereof. Background technique [0002] Magnesia bricks are widely used in steelmaking furnace linings, ferroalloy furnaces, and mixed iron furnaces in the iron and steel industry because of their good high temperature performance and strong resistance to metallurgical slag, linings for copper, lead, tin, and zinc smelting furnaces in non-ferrous industrial furnaces, and lime calcination kilns in the building materials industry. , regenerator lattice body in the glass industry and high temperature calcining kiln in the refractory industry. As the energy crisis has become one of the most concerned issues in the world, energy conservation and consumption reduction have become the main control and assessment indicators for governments and enterprises. With the in-depth rese...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B35/66C04B35/622C04B35/65
CPCC04B35/043C04B35/622C04B35/65C04B38/02C04B2235/96C04B2235/9607
Inventor 尹洪峰袁蝴蝶高魁辛亚楼
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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