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Magnesium-base composite refractory raw material and preparation method thereof

A refractory raw material and raw material technology, applied in the field of magnesium-based composite refractory raw materials and its preparation, can solve the problems of reducing the high-temperature performance and slag erosion resistance of magnesia materials, limiting the application of magnesia materials, etc., so as to improve the comprehensive utilization rate, Improved thermal shock resistance and improved thermal shock resistance

Active Publication Date: 2015-09-16
鞍山盈丰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnesium materials, especially low-grade magnesia materials contain CaO, SiO 2 、Al 2 o 3 , Fe 2 o 3 The low melting point mineral phase formed will significantly reduce the high temperature performance and slag erosion resistance of magnesia materials, which largely limits the application of magnesia materials in high temperature and even ultra high temperature fields.

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  • Magnesium-base composite refractory raw material and preparation method thereof
  • Magnesium-base composite refractory raw material and preparation method thereof
  • Magnesium-base composite refractory raw material and preparation method thereof

Examples

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Embodiment 1

[0034] A magnesium-based composite refractory raw material, the chemical composition of the raw material and the weight percentage content of each component are shown in Example 1 in Table 1, wherein the composite binder consists of 30% ethylene glycol and 70% phenolic formaldehyde by weight percentage Made of resin.

[0035] A preparation method of magnesium-based composite refractory material, the steps of the method are as follows:

[0036] A. by the chemical composition and weight percent of Table 1 embodiment 1, take by weighing various materials;

[0037] b. Put low-grade magnesite or tailings in a muffle furnace and lightly burn at 900°C to obtain lightly burned magnesite;

[0038] c. Co-grind light-burned magnesite and compound additives in a ball mill, and the powder output rate is ≤10t / h;

[0039] d. Lightly burnt magnesite, metal aluminum powder, α-Al 2 o 3 Fine powder and additives are mixed, and the mixed material is added to a composite binder, and pressed in...

Embodiment 2

[0043] A magnesium-based composite refractory raw material, the chemical composition of the raw material and the weight percentage content of each component are shown in Example 2 in Table 1, wherein the composite binder consists of 50% ethylene glycol and 50% phenolic formaldehyde by weight percentage Made of resin.

[0044] A preparation method of magnesium-based composite refractory material, the steps of the method are as follows:

[0045] A. by the chemical composition and weight percent of Table 1 embodiment 2, take by weighing various materials;

[0046] b. Put low-grade magnesite or tailings in a muffle furnace and lightly burn at 900°C to obtain lightly burned magnesite;

[0047] c. Co-grind light-burned magnesite and compound additives in a ball mill, and the powder output rate is ≤10t / h;

[0048] d. Lightly burnt magnesite, metal aluminum powder, α-Al 2 o 3 Fine powder and additives are mixed, and the mixed material is added to a composite binder, and pressed in...

Embodiment 3

[0052] A magnesium-based composite refractory raw material, the chemical components of the raw material and the weight percentage content of each component are shown in Example 3 in Table 1, wherein the composite binder consists of 40% ethylene glycol and 60% phenolic formaldehyde by weight percentage Made of resin.

[0053] A preparation method of magnesium-based composite refractory material, the steps of the method are as follows:

[0054] A. by the chemical composition and weight percent of table 1 embodiment 3, take by weighing various materials;

[0055] b. Put low-grade magnesite or tailings in a muffle furnace and lightly burn at 900°C to obtain lightly burned magnesite;

[0056] c. Co-grind light-burned magnesite and compound additives in a ball mill, and the powder output rate is ≤10t / h;

[0057] d. Lightly burnt magnesite, metal aluminum powder, α-Al 2 o 3 Fine powder and additives are mixed, and the mixed material is added to a composite binder, and pressed int...

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Abstract

The invention discloses a magnesium-base composite refractory raw material and a preparation method thereof. The technical scheme is as follows: the preparation method comprises the following steps: preparing light-burned magnesite from 83-86% of low-grade magnesite or tailings, adding 1-3% of additive, 1-2% of metal aluminum powder, 3-5% of metal silicon powder, 3-5% of alpha-Al2O3 fine powder and 3-4% of composite binder, co-grinding, mixing, compression-moulding, baking and carrying out high-temperature nitridation firing to obtain the magnesium-base composite refractory raw material. Compared with the common high-purity magnesite refractory raw material, the magnesium-base composite refractory raw material has favorable thermal shock resistance, favorable erosion resistance and other high-temperature service properties. The composite additive is added on the basis of the existing impurity components of the low-grade magnesite and tailings, and a self-diffusion high-temperature nitrizing treatment process is utilized to change the matrix composition and liquid-phase distribution, thereby enhancing the comprehensive utilization ratio of the low-grade magnesite and tailings.

Description

technical field [0001] The invention relates to the field of processing and preparation of refractory raw materials, in particular to a magnesium-based composite refractory raw material and a preparation method thereof. Background technique [0002] At present, magnesite resources have entered a period of rapid consumption. Over the years of disorderly mining and the traditional resource utilization mode of mining the rich and abandoning the poor, magnesite is facing a serious resource crisis. Abandoned and stacked land, resulting in a great waste of resources, and the formation of white pollution, serious pollution of the environment, shortening the service life of mines. Since magnesite resources are non-renewable resources, the development and utilization of low-grade ores and tailings is imminent. [0003] Rational use of low-grade magnesite and tailings to accelerate the synthesis of high-quality magnesium-based composite refractory materials is the focus of future mag...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 刘新曲殿利王林郑继春彭晓文张胜男蒋金峰
Owner 鞍山盈丰新材料科技有限公司
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