Preparation method and use method of modified magnesian unfired product binding agent

A binding agent and magnesia technology, applied in the field of refractory materials, can solve the problems of irritating odor and low oxidation resistance, and achieve the effects of being beneficial to carbonization cracking, improving slag resistance and thermal stability, and promoting sintering performance.

Inactive Publication Date: 2020-11-10
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that anhydrous phenolic resin forms glassy carbon with low oxidation resistance and produces a pungent odor during use as a binder for magnesia unfired products

Method used

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  • Preparation method and use method of modified magnesian unfired product binding agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of a modified magnesia unfired product binder:

[0041] Step 1, use anhydrous phenolic resin as the initial binder, and store in a dry, cool, dark, room temperature environment;

[0042] Step 2, get a certain amount of anhydrous phenolic resin, add ferrocene externally, the weight that ferrocene adds is 25% of anhydrous phenolic resin gross weight, ferrocene is dissolved in anhydrous phenolic resin, carry out sufficient Stir mechanically, the stirring time is 40min, and ensure that the surrounding temperature is 60-70°C during stirring, and the modified magnesia unfired product binder is obtained.

[0043] Get this modified magnesia unfired product binder whose weight is 3% of the aggregate of magnesia unfired product and the total weight of powder; carry out according to the use steps of the above-mentioned modified magnesia unfired product binder Hot mixing, molding under 300MPa pressure, heat treatment at 200℃ for 24h.

[0044] Experimental testi...

Embodiment 2

[0047] A preparation method of a modified magnesia unfired product binder:

[0048] Step 1, use anhydrous phenolic resin as the initial binder, and store in a dry, cool, dark, room temperature environment;

[0049] Step 2, get a certain amount of anhydrous phenolic resin, add ferrocene externally, the weight that ferrocene adds is 30% of anhydrous phenolic resin gross weight, ferrocene is dissolved in anhydrous phenolic resin, carry out sufficient Stir mechanically, the stirring time is 40min, and ensure that the surrounding temperature is 60-70°C during stirring, and the modified magnesia unfired product binder is obtained.

[0050] Get this modified magnesia unfired product binder whose weight is 5% of the aggregate of magnesia unfired products and the total weight of powder; carry out according to the use steps of the above-mentioned modified magnesia unfired product binder Hot mixing, molding under 300MPa pressure, heat treatment at 300℃ for 24h.

[0051] Experimental te...

Embodiment 3

[0053] A preparation method of a modified magnesia unfired product binder:

[0054] Step 1, use anhydrous phenolic resin as the initial binder, and store in a dry, cool, dark, room temperature environment;

[0055] Step 2, get a certain amount of anhydrous phenolic resin, add ferrocene externally, the weight that ferrocene adds is 28% of anhydrous phenolic resin gross weight, ferrocene is dissolved in anhydrous phenolic resin, carry out sufficient Stir mechanically, the stirring time is 40min, and ensure that the surrounding temperature is 60-70°C during stirring, and the modified magnesia unfired product binder is obtained.

[0056] Get this modified magnesia unfired product binder whose weight is 4% of the aggregate of magnesia unfired product and the total weight of powder; carry out according to the use steps of the above-mentioned modified magnesia unfired product binder Hot mixing, molding under 350MPa pressure, heat treatment at 1000℃ for 4h.

[0057] Tests show that ...

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Abstract

The invention discloses a preparation method and a use method of a modified magnesian unfired product binding agent, and the preparation method comprises the following steps: adding ferrocene into anhydrous phenolic resin to obtain the modified magnesian unfired product binding agent; taking the modified magnesian unfired product binding agent which accounts for 3-5% of the total weight of the aggregate and the powder of the magnesian unfired product; and carrying out hot mixing, molding under the pressure intensity of 150-350MPa, and carrying out reduction gas heat treatment at 1650 DEG C for4h. The anhydrous phenolic resin is modified, so that the inherent advantages of high viscosity, high carbonization residual carbon content and high product strength of the binding agent are ensured;according to the method, the carbon nanostructure is formed in the carbonization process, the organic grid structure is synthesized in situ at the heat treatment temperature, crystalline carbon graphite with very high oxidation resistance is formed in the carbonization process, the carbon nanostructure is formed in the medium-temperature reducing atmosphere, the strength and the heat stability ofthe magnesium unfired product are further enhanced, and the method has practical significance in production and preparation of the magnesium unfired product.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a preparation method and application method of a modified magnesia unfired product binder. Background technique [0002] The production and preparation of traditional refractory materials often require high-temperature sintering to meet the requirements of use, but this process consumes a lot of energy. In order to reduce energy consumption and make the production of refractory products more environmentally friendly, my country vigorously advocates the development and preparation of non-fired products. In the production process of magnesia non-burning refractory products, because the refractory materials can be put into use without sintering, and because the main particle raw materials are often barren materials when producing magnesia non-burning refractory products, it is necessary to use Adhesives that provide a cohesive effect, giving it some strength in the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/634C04B35/632C04B35/66C04B35/04
CPCC04B35/63476C04B35/6325C04B35/66C04B35/04C04B2235/602C04B2235/77C04B2235/96C04B2235/9669
Inventor 王黎李金锋廖桂华钟俊鹏张宇程白雪何新施宇博
Owner LUOYANG INST OF SCI & TECH
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