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Light mullite refractory coating

A light-weight mullite and coating technology, which is applied in the field of refractory materials, can solve the problems of short service life of refractory materials, reduced furnace operation efficiency, and prolonged furnace shutdown time.

Inactive Publication Date: 2014-02-05
NINGXIA TIANZONG HONGGUANG COGENERATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For example, the protective layer on the inner surface of the blast furnace, hot blast stove shell, blast furnace head, gas outlet pipe, and working lining of the dust collector all need to use refractory materials. If the refractory castable inside the furnace falls off, the furnace needs to be shut down for more than one day. After the temperature drops to room temperature, workers can be sent in to pry off part of the castable material, and then set up the mold again before manual pouring. After pouring, it needs to be maintained for 3 days before it can be re-ignited. The service life of the refractory material after the above-mentioned repair method is relatively short, which causes Prolonged shutdown time, resulting in reduced operating efficiency of the furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) The parts by weight of raw materials used to prepare lightweight mullite refractory spray coatings are: 60 parts of low-aluminum mullite, 11 parts of super-grade kaolin, 6 parts of aluminum lactate, 8 parts of pure calcium aluminate cement, and 10 parts of silica fume parts, 5 parts of water; low-aluminum mullite and super-grade kaolin are mixed to make granules and fine powders, wherein the parts by weight of granules and fine powders are: 30 parts of granules, 70 parts of fine powders, and the particle size range is 2.0 mm, the fine powder particle size is 1.4mm.

[0013] (2) Low-aluminum mullite, super kaolin, aluminum lactate, pure calcium aluminate cement, and silica fume are premixed, and after uniformity, water is added to knead to obtain a lightweight mullite refractory spray coating.

[0014] Its physical performance index is: after baking at 110℃×12h, the compressive strength is 20MPa, and the bulk density is 1.5g / cm 3 ;After 1000℃×3h high temperature reb...

Embodiment 2

[0016] (1) The parts by weight of raw materials used to prepare lightweight mullite refractory spray coatings are: 50 parts of low-aluminum mullite, 24 parts of super-grade kaolin, 5 parts of aluminum lactate, 6 parts of pure calcium aluminate cement, and 5 parts of silica fume parts, 10 parts of water; low-aluminum mullite and super-grade kaolin are mixed to make granules and fine powders, wherein the parts by weight of granules and fine powders are: 70 parts of granules, 30 parts of fine powders, and the particle size range is 1.5 mm, the fine powder particle size is 0.5mm.

[0017] (2) Low-aluminum mullite, super kaolin, aluminum lactate, pure calcium aluminate cement, and silica fume are premixed, and after uniformity, water is added to knead to obtain a lightweight mullite refractory spray coating.

[0018] Its physical performance index is: after baking at 110℃×12h, the compressive strength is 19MPa, and the bulk density is 1.4g / cm 3 ;After 1000℃×3h high-temperature reb...

Embodiment 3

[0020] (1) The parts by weight of raw materials used to prepare lightweight mullite refractory spray coatings are: 54 parts of low-aluminum mullite, 15 parts of super-grade kaolin, 10 parts of aluminum lactate, 7 parts of pure calcium aluminate cement, and 8 parts of silica fume 6 parts of water; low-aluminum mullite and super-grade kaolin are mixed to make granules and fine powders, wherein the parts by weight of granules and fine powders are: 30-70 parts of granules, 30-70 parts of fine powders, and 30-70 parts of fine powders. The diameter range is 2.0-1.5mm, and the fine powder particle size is 1.4-0.5mm.

[0021] (2) Low-aluminum mullite, super kaolin, aluminum lactate, pure calcium aluminate cement, and silica fume are premixed, and after uniformity, water is added to knead to obtain a lightweight mullite refractory spray coating.

[0022] Its physical performance index is: after baking at 110℃×12h, the compressive strength is 21MPa, and the bulk density is 1.38g / cm 3 ;...

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Abstract

The invention relates to a light mullite refractory coating which is prepared from the following components in parts by weight: 50-60 parts of low-aluminium-content mullite, 10-25 parts of special-grade kaolin, 5-20 parts of aluminum lactate, 6-8 parts of pure calcium aluminate cement, 5-10 parts of silica fume, and 5-10 parts of water; after being mixed, the low-aluminium-content mullite and the special-grade kaolin are prepared into 30-70 parts by weight of particles and 30-70 parts by weight of fine powder; the particle diameter of the particles is in the range of 2.0-1.5 mm; the particle diameter of the fine powder is in the range of 1.4-0.5 mm. The light mullite refractory coating disclosed by the invention can be applied in a spraying manner. Compared with the traditional pouring manner, a spray manner of the light mullite refractory coating disclosed by the invention has the advantages that more than 60% of time can be saved.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, in particular to a lightweight mullite refractory spray coating. Background technique [0002] Compared with qualitative refractory products, unshaped refractory materials represented by refractory castables have the advantages of short process flow, low production energy consumption and cost, convenient use, wide application range, integrity and good use effect, so they are widely used in the world. It has developed rapidly, and its proportion in the whole refractory material is getting higher and higher. In some countries with advanced refractory technology, the output of unshaped refractories has approached or even exceeded the output of shaped products. For example, the current output of unshaped refractory materials in Japan accounts for about 60% of the total refractory materials; in the United States, it is about 50%; in Britain, Germany, France and other countries, it is 40%...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 穆祥王西来董伟胜刘文艳解仁刘朝晖苏新国王淑娟
Owner NINGXIA TIANZONG HONGGUANG COGENERATION TECH
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