Refractory material and preparation method therefor

A technology of refractory materials and raw materials, applied in the field of refractory materials, can solve problems such as low compressive strength at room temperature, decrease in bulk density, and deterioration of physical properties, and achieve the effects of reducing porosity, good fluidity, and preventing loosening or cracking

Inactive Publication Date: 2015-11-11
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

[0005] The purpose of the present invention is to solve the problem that in the existing process for preparing refractory materials, due to the unstable phases in the form of alkali metal oxides such as sodium and potassium in the raw materials, the product expands during the production process, causing the apparent porosity to be relatively large. Bulk density decreases, physical properties deteriorate, and the defects of low compressive strength at room temperature provide a refractory material with high refractoriness, excellent corrosion resistance, good thermal shock resistance, and a wide sintering temperature range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A refractory material, the refractory material is composed of the following raw materials in parts by mass: 100 parts of alumina particles, 25 parts of α-alumina powder, 15 parts of nano-alumina, 20 parts of zirconia, 10 parts of graphene, 5 parts of additives, 7 parts of binding agent and 5 parts of nano magnesium oxide.

[0036] A preparation method of a refractory material, each raw material is weighed according to the above ratio, and the mixed material after mixing is ground for 10 hours with anhydrous alcohol as a medium, and then dried in a vacuum to obtain a powder, and 55,000 volts are applied to the reaction powder The plasma arc is used to melt the powder, and the melted powder is blown into the press equipment by inert gas to prepare shaped products of various required sizes, dried at 120°C for 10 hours, and then kept at 1700°C for 30 minutes. A refractory material is obtained; the vacuum degree of vacuum drying is 0.001-0.008MPa, the drying temperature is 1...

Embodiment 2

[0039]A refractory material, the refractory material is composed of the following raw materials in parts by mass: 110 parts of alumina particles, 30 parts of α-alumina powder, 18 parts of nano-alumina, 25 parts of zirconia, 15 parts of graphene, 7 parts of additives, 10 parts of binder and 10 parts of nano magnesium oxide.

[0040] A method for preparing a refractory material. The raw materials are weighed according to the above proportions, and the mixed material is ground with anhydrous alcohol as a medium for 11 hours, and then dried in a vacuum to obtain a powder, and 58,000 volts are applied to the reaction powder. The plasma arc is used to melt the powder, and the melted powder is blown into the press equipment by inert gas to prepare shaped products of various required sizes, dried at 130°C for 11 hours, and then kept at 1750°C for 40 minutes. A refractory material is obtained; the vacuum degree of vacuum drying is 0.001-0.008MPa, the drying temperature is 140°C, and th...

Embodiment 3

[0043] A refractory material, the refractory material is composed of the following raw materials in parts by mass: 120 parts of alumina particles, 35 parts of α-alumina powder, 20 parts of nano-alumina, 35 parts of zirconia, 20 parts of graphene, 10 parts of additives, 12 parts of binder and 12 parts of nano magnesium oxide.

[0044] A method for preparing a refractory material. The raw materials are weighed according to the above proportions, and the mixed material after uniform mixing is ground for 12 hours with anhydrous alcohol as a medium, and then dried in a vacuum to obtain a powder, and 60,000 volts are applied to the reaction powder. The plasma arc is used to melt the powder, and the melted powder is blown into the press equipment by an inert gas to prepare shaped products of various required sizes, dried at 150°C for 12 hours, and then kept at 1800°C for 50 minutes. A refractory material is obtained; the vacuum degree of vacuum drying is 0.001-0.008MPa, the drying te...

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Abstract

The invention relates to a refractory material and a preparation method therefor. The refractory material consists of the following raw materials in parts by mass: 100-120 parts of aluminium oxide particles, 25-35 parts of alpha-aluminium oxide powder, 15-20 parts of nano aluminium oxide, 20-35 parts of zirconium oxide, 10-20 parts of graphene, 5-10 parts of an additive, 7-12 parts of a binding agent and 5-12 parts of nano magnesium oxide. The refractory material disclosed by the invention is internally compact; volume density of the refractory material is improved, and apparent porosity of the refractory material is reduced to prevent expansion, so that various physical performances such as strength, thermal shock resistance, and thermal impact resistance of the refractory material are further improved. The preparation method is simple and suitable for industrial production; and raw materials are rich.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a refractory material with high refractoriness, excellent corrosion resistance, good thermal shock resistance and wide sintering temperature range and a preparation method thereof. Background technique [0002] With the increasing shortage of energy, countries are paying more and more attention to the development, production and use of high-temperature industrial energy-saving materials. High-temperature kilns need to use a large number of refractory materials with excellent performance or special properties. Aluminum chromium refractories generally refer to zirconia ≤ 40% in refractory materials, and the balance is generally alumina, which has the characteristics of high refractoriness, excellent corrosion resistance, good thermal shock resistance and high wear resistance. It is widely used as the back lining of coal-water slurry pressurized gasifier, the inner lining of carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/10
Inventor 佘建锋
Owner 长兴泓矿炉料有限公司
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