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Lightweight heat-insulating magnesium oxide-calcium oxide refractory material and preparation method therefor

A refractory material and a magnesia-calcium refractory technology, which is applied in the field of lightweight heat-insulating magnesia-calcium refractory materials and the production thereof, can solve the problems of unfavorable industrialized production, high technological requirements, complicated production processes, etc. The effect of low process requirements and stable process

Inactive Publication Date: 2017-11-17
长兴泓矿炉料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The outer layer of the sample prepared by this invention is dense, but the inner layer is porous, so as to achieve better thermal insulation effect, but its production process is very complicated, and the raw materials need to be ground to different particle sizes, mixed in steps and then sintered, and the process requirements High, not conducive to industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh raw materials according to the formula, 25 parts of periclase, 55 parts of limestone, 1.5 parts of rice husk powder, H 3 BO 3 1 part, Fe 2 o 3 1 part, wet co-grinding for 1 hour to fully mix the raw materials, dehydrate the co-milled mixture, press to form, dry to obtain the green body, put the green body in the furnace for calcination, the firing temperature is 1650 ° C, and keep warm for 3 Hours, after cooling, it is broken into particles, and the particles are put into the vacuum chamber of a vacuum ion coating machine to deposit an aluminum oxide layer with a thickness of 6 μm.

Embodiment 2

[0021] Weigh raw materials according to the formula, 30 parts of periclase, 25 parts of calcite, 1 part of rice husk powder, H 3 BO 3 1.5 parts, Fe 2 o 3 1.5 parts, wet co-grinding for 1 hour to fully mix the raw materials, dehydrate the co-milled mixture, press to form, dry to obtain the green body, put the green body in the furnace for calcination, the firing temperature is 1700 ° C, and keep warm for 6 Hours, after cooling, it is broken into particles, and the particles are put into the vacuum chamber of a vacuum ion coating machine to deposit an aluminum oxide layer with a thickness of 16 μm.

Embodiment 3

[0023] Weigh raw materials according to the formula, 25 parts of dolomite, 40 parts of limestone, 1 part of rice husk, H 3 BO 3 1.3 parts, Fe 2 o 3 1.3 parts, wet co-grinding for 1 hour to fully mix the raw materials, dehydrate the co-milled mixture, press to form, dry to obtain the green body, put the green body into the furnace for calcination, the firing temperature is 1650 ° C, and keep warm for 5 Hours, after cooling, it is broken into particles, and the particles are put into the vacuum chamber of a vacuum ion coating machine to deposit an aluminum oxide layer with a thickness of 20 μm.

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Abstract

The invention relates to a lightweight heat-insulating magnesium oxide-calcium oxide refractory material and a preparation method therefor. The castable is prepared from the ingredients in parts by mass: 25-30 parts of magnesium oxide, 50-55 parts of calcium oxide, 3-5 parts of aluminum oxide, 1-1.5 parts of pore former, 1-1.5 parts of stabilizer and 1-1.5 parts of agglomerant, wherein the aluminum oxide coats the surface of the material in the form of an aluminum oxide film. The material achieves very good heat-preserving and heat-insulating effects and hydration resistance by using an outer layer, i.e., a dense aluminum oxide film layer and an internal porous magnesium oxide-calcium oxide refractory material. Meanwhile, the material is low in cost, little in pollution and resistant to high temperatures and is not prone to damage, and the service life of the material is prolonged. According to the preparation method, the number of steps is small, the processes are simple and are all mature common processes, and thus, industrialization is facilitated.

Description

technical field [0001] The invention relates to a magnesium-calcium refractory material, in particular to a light-weight heat-insulating magnesium-calcium refractory material and a manufacturing method thereof. Background technique [0002] Industrial kilns are the main energy-consuming equipment in industrial production, and the annual energy consumption is huge. Especially in the thermal processing of metallurgy, the energy consumption of industrial kilns can account for 40%-70% of the total energy consumption. With the With the development of industry and the increase in demand for clean steel, steelmaking technology is increasingly advanced and clean, smelting conditions are becoming increasingly harsh, and the quality requirements for refractory materials are getting higher and higher. Variety, quality, and use are closely related. Magnesium-calcium refractories not only do not pollute molten steel, but also have the function of purifying molten steel. At the same time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/04C04B35/057C04B35/66C04B38/06C04B41/87
CPCC04B35/04C04B35/057C04B35/66C04B38/0675C04B41/009C04B41/4584C04B41/87C04B2235/3272C04B2235/3409C04B41/5031C04B41/4533
Inventor 佘建锋
Owner 长兴泓矿炉料有限公司
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