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Porous periclase-forsterite multiphase material and preparation method thereof

A technology of forsterite and periclase, which is applied in the field of porous periclase-forsterite composite materials and its preparation, can solve the problems of low compressive strength, poor material stability, complex process, etc., and achieve heat insulation effect Good, high load softening temperature point, stable volume effect

Inactive Publication Date: 2017-02-22
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation of porous ceramic materials by burn-off method increases the difficulty of molding and increases the CO 2 emissions, causing harm to the environment
Preparation of porous ceramic materials by foaming method, the process is relatively complicated, the performance of the finished product is not easy to control, and the compressive strength of the product is low
Carbonate in situ decomposition method is to use carbonate minerals to decompose CO 2 Gas method, forming pores inside the material, such as: Hu Limin and others prepared periclase-forsterite porous materials with magnesite, powdered quartz, and silica powder as raw materials (Hu Limin, Li Nan. In situ decomposition to prepare high-strength Lightweight forsterite material [J]. Refractories. 2005,39 ( 4 ):283~285), a high-strength porous forsterite material obtained by this method, but there is a large amount of gas during the preparation process Exhausted from the inside of the material, it is not easy to control the discharge path of the gas, and the resulting material has poor stability

Method used

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  • Porous periclase-forsterite multiphase material and preparation method thereof
  • Porous periclase-forsterite multiphase material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Mix 55wt% magnesia raw material and 45wt% siliceous raw material uniformly by weight percentage to make mixed raw material, add the sum of the above-mentioned raw material mass percentage and 4wt% pulp waste liquid as additive, stir to obtain mixed sludge, Pour the mud into the mold and press it under 100MPa to obtain the green body. After baking the green body at 120°C for 6 hours, put it into a high-temperature furnace and calcinate it at 1650-1680°C for 3 hours to obtain a porous square. Magnesite-forsterite composite material.

[0021] The magnesia raw material described in this embodiment is sintered magnesia, the weight percentage of MgO in the raw material is ≥95.0wt%, and the particle size is ≤0.088mm; the silica raw material is fused quartz, and the SiO 2 Mass percentage content ≥ 99.0wt%, particle size: 0.01 ~ 0.088mm.

[0022] The technical indicators of the porous periclase-forsterite composite material prepared in this example are: the compressive strength...

Embodiment 2

[0024] Mix 65wt% magnesia raw material and 35wt% siliceous raw material uniformly by weight percentage to make mixed raw material, then add the sum of 6wt% dextrin of the above-mentioned raw material mass percentage as additive, stir to obtain mixed sludge, Pour the mud into the mold and press it at 110MPa to obtain a green body. After baking the green body at 130°C for 5 hours, put it into a high-temperature furnace and calcinate it at 1600-1650°C for 3 hours to obtain a porous square. Magnesium-forsterite composite material.

[0025] The magnesia raw material described in this embodiment is light-burned magnesia, the weight percentage of MgO in the raw material is ≥90.0wt%, and the particle size is ≤0.088mm; the siliceous raw material is waste silica brick, and the raw material is SiO 2 Mass percentage content ≥ 94.0wt%, particle size: 0.02 ~ 0.12mm.

[0026] The technical indicators of the porous periclase-forsterite composite material prepared in this example are: the co...

Embodiment 3

[0028] Mix 60wt% magnesia raw material and 40wt% siliceous raw material by weight percentage to make mixed raw material, add the magnesium chloride of the sum 4wt% of above-mentioned raw material mass percentage as additive, stir to obtain mixed mud material, mud Pour the material into a mold and press it under 120MPa to obtain a green body. After baking the green body at 120°C for 6 hours, put it into a high-temperature furnace and calcinate it at 1700-1720°C for 5 hours to obtain porous square magnesium- Forsterite composite material.

[0029] The magnesia raw material described in this embodiment is fused magnesia, the weight percentage of MgO in the raw material is ≥98.0wt%, and the particle size is ≤0.088mm; the silica raw material is fused quartz, and the SiO 2 Mass percentage content ≥ 99.0wt%, particle size: 0.01 ~ 0.088mm.

[0030] The technical indicators of the porous periclase-forsterite composite material prepared in this embodiment are: the normal temperature co...

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Abstract

The invention relates to a porous periclase-forsterite multiphase material and a preparation method thereof. The method comprises steps as follows: 48wt%-85wt% of a magnesium oxide raw material and 15wt%-52wt% of a silicon dioxide raw material are evenly mixed to form a mixed raw material, an additive accounting 3wt%-12wt% of the sum of mass percentages of raw materials is added, mixed mud is obtained after even stirring and poured in a mold to be mechanically pressed under 80-130 MPa, a blank is obtained, baked at 100-180 DEG C for 3-10 h and calcined at 1,500-1,750 DEG C for 1-16 h in a high-temperature furnace, and the porous periclase-forsterite multiphase material is prepared. A sintering in-situ pore forming technology is adopted, the production process is pollution-free, and the obtained product has the characteristics of high refractoriness under load, stable size, staggered pore structure, good thermal insulation effect and capability of being used at the high temperature of 1,500-1,700 DEG C for a long time.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and relates to a preparation method of novel porous ceramics or porous refractory materials, in particular to a porous periclase-forsterite composite material and a preparation method thereof. Background technique [0002] Porous ceramic materials are widely used in various fields such as metallurgy, environmental protection, and chemical industry because of their excellent properties such as heat insulation, filtration, and sound absorption. Periclase-forsterite composite material has high service temperature, excellent heat insulation effect, and good resistance to erosion of molten metal. It is a kind of porous ceramic material with development prospects. [0003] In recent years, the methods for preparing porous ceramic materials mainly include burn-off method, foaming method, and carbonate in-situ decomposition method. The preparation of porous ceramic materials by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/043C04B38/06
CPCC04B38/0645C04B35/043C04B38/0665C04B2235/3418C04B2235/444C04B2235/77C04B2235/96
Inventor 赵飞叶国田葛铁柱刘新红陈留刚任桢
Owner ZHENGZHOU UNIV
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