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Magnesium olivine-texture lightweight refractory and preparation method thereof

A technology of forsterite and refractory materials, which is applied in the field of lightweight refractory materials, can solve the problems of reducing the yield of materials, collapse and damage of green body materials, etc., and achieve the effects of increasing yield, reducing preparation costs, and improving stability

Inactive Publication Date: 2017-06-13
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The foaming method is used to prepare forsterite lightweight refractory materials. Generally, the forsterite raw material and foaming agent are mixed, shaped, dried, and fired (Dong Tonglin, et al. "Preparation of mullite lightweight refractory materials by foaming method Technology Research", "Journal of Wuhan University of Science and Technology", 2009, 32(2): pp184~187; Wang Hua, et al. "Synthesis of mullite lightweight refractory material by foaming grouting method", "Fire Science", 2013, 22 (2): pp84~87), although the foaming method has its obvious advantages, but when a large amount of water in the foaming liquid escapes during the drying stage, it is easy to cause the collapse and damage of the formed green body material, which reduces the yield of the material

Method used

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Embodiment 1

[0039] A forsterite lightweight refractory material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0040] The first step is to put DDBAC foaming agent, polyacrylamide, ammonium bicarbonate and water into a container under the condition of 40-45°C water bath, and ultrasonically disperse for 3-5 minutes to obtain a foaming liquid; among them: DDBAC foaming agent The mass ratio of foaming agent: polyacrylamide: ammonium bicarbonate: water is 1: (1-3): (2-4): (50-54).

[0041] In the second step, the mass ratio of natural forsterite ore:silicon carbide is 100:(4-6), and the mixture is ball milled until the particle size is ≤100 μm to obtain a mixture.

[0042] The third step is to mix the mixture in a planetary ball mill for 10 to 15 minutes, press it under the condition of 30 to 50 MPa; Minutes, cooled with the furnace, crushed after coming out of the furnace, and ground to a particle size of 50-60 μm to obtain...

Embodiment 2

[0048] A forsterite lightweight refractory material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0049] The first step is to put DDBAC foaming agent, polyacrylamide, ammonium bicarbonate and water into a container under the condition of 40-45°C water bath, and ultrasonically disperse for 3-5 minutes to obtain a foaming liquid; among them: DDBAC foaming agent The mass ratio of foaming agent: polyacrylamide: ammonium bicarbonate: water is 1: (1-3): (2-4): (52-56).

[0050] In the second step, the mass ratio of natural forsterite ore:silicon carbide is 100:(4-6), and the mixture is ball milled until the particle size is ≤100 μm to obtain a mixture.

[0051]The third step is to mix the mixture in a planetary ball mill for 10 to 15 minutes, press it under the condition of 30 to 50 MPa; Minutes, cooled with the furnace, crushed after coming out of the furnace, and ground to a particle size of 50-60 μm to obtain ...

Embodiment 3

[0057] A forsterite lightweight refractory material and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0058] The first step is to put DDBAC foaming agent, polyacrylamide, ammonium bicarbonate and water into a container under the condition of 40-45°C water bath, and ultrasonically disperse for 3-5 minutes to obtain a foaming liquid; among them: DDBAC foaming agent The mass ratio of foaming agent: polyacrylamide: ammonium bicarbonate: water is 1: (2-4): (3-5): (54-58).

[0059] In the second step, the mass ratio of natural forsterite ore:silicon carbide is 100:(5-7), and the mixture is ball milled until the particle size is ≤100 μm to obtain a mixture.

[0060] The third step is to mix the mixture in a planetary ball mill for 10 to 15 minutes, press it under the condition of 30 to 50 MPa; Minutes, cooled with the furnace, crushed after coming out of the furnace, and ground to a particle size of 50-60 μm to obtain...

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Abstract

The invention relates to a magnesium olivine-texture lightweight refractory and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: blending a DDBAC foaming agent, polyacrylamide, ammonium hydrogen carbonate and water in a mass ratio of 1 to (1-4) to (2-5) to (50-60), and carrying out ultrasonic dispersion in a container under a water bath condition, so as to prepare foaming liquid; blending nature magnesium olivine ore and silicon carbide in a mass ratio of 100 to (4-7), carrying out ball-milling, mixing in a planetary ball mill, and carrying out compression molding; carrying out thermal treating at 900-1000 DEG C in a muffle furnace, carrying out furnace cooling, crushing, and grinding, so as to obtain a thermally treated material; and blending the foaming liquid, the thermally treated material and magnesium oxalate in a mass ratio of (30-40) to 100 to (6-8), mixing, forming, carrying out vacuum freeze drying, and sintering at 1400-1500 DEG C in the muffle furnace, so as to obtain the magnesium olivine-texture lightweight refractory. The preparation method has the characteristics of low cost and high yield; and the prepared magnesium olivine-texture lightweight refractory has low volume density, large compression strength and small heat conductivity coefficient.

Description

technical field [0001] The invention belongs to the technical field of lightweight refractory materials. Specifically relates to a forsterite light refractory material and a preparation method thereof. Background technique [0002] With the increasing demand for energy saving and consumption reduction in high-temperature industries, various thermal kilns have higher and higher requirements for energy utilization. Lightweight, low thermal conductivity and high-strength refractory materials can effectively save energy, such as "A mullite lightweight refractory material and its preparation method" (CN 201510186484.8). Therefore, heat-insulating refractory materials with excellent performance directly affect the energy consumption and stable operation of high-temperature industries. [0003] Forsterite (2MgO·SiO 2 , abbreviated as M 2 S) is MgO-SiO 2 The only stable refractory phase in the system, which has the advantages of high melting point (1890°C), high softening temper...

Claims

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Application Information

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IPC IPC(8): C04B38/10C04B35/66C04B35/20C04B38/02C04B35/622
CPCC04B38/10C04B35/20C04B35/622C04B35/66C04B38/02C04B2235/3826C04B2235/449C04B2235/606C04B2235/77C04B2235/96C04B2235/9607C04B38/0067
Inventor 张寒赵惠忠陈建威赵鹏达余俊
Owner WUHAN UNIV OF SCI & TECH
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