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Coal-fired multi-composite spinel material and its preparation method and application

A spinel and aluminum-magnesium spinel technology is applied in the field of coal-fired multi-composite spinel materials and their preparation, which can solve the problems of short service life and incompetence, and achieve high refractoriness, prolong service life, The effect of low apparent porosity

Active Publication Date: 2022-06-28
REFRACTORY MATERIAL OF SINOSTEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide coal-fired multi-composite spinel materials to solve technical problems in the prior art that the composite spinel materials are not resistant to burning and have short service life in specific environments.

Method used

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  • Coal-fired multi-composite spinel material and its preparation method and application

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preparation example Construction

[0055] The present invention also provides a method for preparing the coal-fired multi-composite spinel material, comprising the following steps:

[0056] The raw materials are mixed according to the proportion, molded under high pressure, baked at 80-150 DEG C for 12-48 hours, and then sintered at 1300-1650 DEG C for 40-50 hours.

[0057] In a specific embodiment of the present invention, the high pressure forming is performed in a mold. Further, the pressure of the high pressure forming is 630T to 1250T.

[0058] The present invention also provides the application of any one of the above coal-fired multi-composite spinel materials in refractory materials.

[0059] In a specific embodiment of the present invention, the refractory material is a furnace lining material. Further, the furnace lining material is the furnace lining material of the coal-injected sleeve lime kiln. However, this lining material can not only be used in coal-injection sleeve lime kilns, but also in r...

Embodiment 1

[0061] The present embodiment provides a method for preparing a coal-fired multi-composite spinel material, comprising the following steps:

[0062] (1) In parts by weight, weigh 5 parts of magnesium-iron-aluminum composite spinel, 12 parts of aluminum-magnesium spinel, 50 parts of chromium-containing materials, 6 parts of zirconium-containing materials, 15 parts of corundum materials, and 5 parts of binders , α-Al 2 O 3 5 parts of micropowder and 2 parts of water;

[0063] Among them, in the magnesium-iron-aluminum composite spinel, the content of MgO is 5wt%, and the Al 2 O 3 The content is 85wt%, Fe 2 O 3 The content of Al-Mg is 5wt%; in Al-Mg spinel, Al 2 O 3 The content of MgO is 91wt%, and the content of MgO is 6%; the chromium-containing material is a low-chromium-chromium corundum and an aluminum-chromium eutectic with a mass ratio of 1:1. In the low-chromium-chromium corundum, Cr 2 O 3 The content is 1wt%, in the aluminum-chromium eutectic, Cr 2 O 3 The con...

Embodiment 2

[0067] The present embodiment provides a method for preparing a coal-fired multi-composite spinel material, comprising the following steps:

[0068] (1) In parts by weight, weigh 12 parts of magnesium-iron-aluminum composite spinel, 5 parts of aluminum-magnesium spinel, 40 parts of chromium-containing materials, 10 parts of zirconium-containing materials, 19 parts of corundum materials, and 2 parts of binders , α-Al 2 O 3 10 parts of micropowder and 2 parts of water;

[0069] Among them, in the magnesium-iron-aluminum composite spinel, the content of MgO is 8wt%, and the Al 2 O 3 The content is 88wt%, Fe 2 O 3 The content of Al-Mg is 3wt%; in Al-Mg spinel, Al 2 O 3 The content of MgO is 90wt%, and the content of MgO is 5wt%; the chromium-containing material is low-chromium-chromium corundum and aluminum-chromium eutectic with a mass ratio of 1:1. In low-chromium-chromium corundum, Cr 2 O 3 The content of 2wt%, aluminum-chromium eutectic, Cr 2 O 3 The content of zirc...

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Abstract

The invention relates to the technical field of spinel materials, in particular to a coal-fired multi-composite spinel material and its preparation method and application. Coal-fired multi-composite spinel materials are mainly prepared from the following raw materials in parts by weight: 5-20 parts of magnesium-iron-aluminum composite spinel, 5-20 parts of aluminum-magnesium spinel, and 40-60 parts of chromium-containing materials parts, 3-10 parts of zirconium-containing materials, 10-20 parts of corundum materials; chromium-containing materials include low-chromium chromium corundum and / or aluminum-chromium eutectic; zirconium-containing materials include zirconia, zirconium corundum and zirconium mullite Any one or more; corundum materials include fused corundum and / or sintered corundum. When the coal-fired multi-composite spinel material is used as a furnace lining material in a sleeve lime kiln, its resistance to various atmospheres and components of a coal-injected sleeve lime kiln is better than that of existing high-temperature materials. , Lime, and various coal powders have excellent resistance to corrosion at high temperatures, and can significantly prolong the service life.

Description

technical field [0001] The invention relates to the technical field of spinel materials, in particular to a coal-fired multi-composite spinel material and a preparation method and application thereof. Background technique [0002] Sleeve lime kiln is the main equipment for steel making, and the active lime produced by it is used for steel making. The production methods of active lime include: using coke oven gas or blast furnace gas to burn lime to produce active lime; or, using inferior coal to pulverize and spray it into the furnace to produce active lime. The lining of the sleeve lime kiln is mainly made of alkaline materials such as magnesia bricks and clay bricks, and the current lining is not resistant to burning. When using lime, the furnace life is 8 to 10 years, and when there is low-quality coal, the furnace life is only 2 years. ~3 months. [0003] The new generation of energy-saving and high-efficiency coal-injected lime sleeve shaft furnace is due to factors s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/10
CPCC04B35/66C04B35/10C04B2235/3222C04B2235/3217C04B2235/3241C04B2235/3244C04B2235/447C04B2235/3218C04B2235/602C04B2235/606C04B2235/656C04B2235/6567C04B2235/77C04B2235/96C04B2235/9615C04B2235/9607
Inventor 张利新沈浩
Owner REFRACTORY MATERIAL OF SINOSTEEL CORP
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