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Magnesium-iron-zinc-aluminum composite spinel refractory brick for cement kiln firing zone and preparation method of magnesium-iron-zinc-aluminum composite spinel refractory brick

A technology for firing zone and cement kiln, which is applied to magnesia-iron-zinc-aluminum composite spinel refractory bricks used in the firing zone of cement kilns and their preparation, and the field of refractory bricks, which can solve the problems that the strength of refractory bricks cannot be satisfied.

Active Publication Date: 2021-07-02
营口丰华耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of existing refractory bricks is often difficult to meet the needs of the market

Method used

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  • Magnesium-iron-zinc-aluminum composite spinel refractory brick for cement kiln firing zone and preparation method of magnesium-iron-zinc-aluminum composite spinel refractory brick
  • Magnesium-iron-zinc-aluminum composite spinel refractory brick for cement kiln firing zone and preparation method of magnesium-iron-zinc-aluminum composite spinel refractory brick
  • Magnesium-iron-zinc-aluminum composite spinel refractory brick for cement kiln firing zone and preparation method of magnesium-iron-zinc-aluminum composite spinel refractory brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation method of a magnesium-iron-zinc-aluminum composite spinel refractory brick for the firing zone of a cement kiln is as follows.

[0044] (1) Preparation of composite binder: Weigh 7 parts of magnesium chloride, 10 parts of polyaluminum chloride, 3 parts of calcium lignosulfonate, and add 80 parts of water. Put it into a small polyurethane tank and ball mill it for 20 minutes to make a composite binder slurry.

[0045] (2) Weighing: 20 parts of 5-3mm high-purity sintered magnesia, 20 parts of 3-1mm high-purity sintered magnesia, 10 parts of 1-0.1mm high-purity sintered magnesia, 5 parts of 1-0.1mm high-iron high-purity magnesia, 5 parts of 1-0.5mm fused magnesia-aluminum spinel, 27 parts of -325 mesh high-purity fused magnesia, 8 parts of <10μm active magnesia-aluminum spinel powder, 5 parts of nano-zinc oxide powder, composite binder slurry 5 servings.

[0046] (3) Fine powder co-grinding: Put 27 parts of -325 mesh high-purity fused magnesia, 8 parts of...

Embodiment 2

[0053] The preparation method of a magnesium-iron-zinc-aluminum composite spinel refractory brick for the firing zone of a cement kiln is as follows.

[0054] (1) Preparation of composite binder: weigh 10 parts of magnesium chloride, 9 parts of polyaluminum chloride, 2 parts of calcium lignosulfonate, and add 82 parts of water. Put it into a small polyurethane tank and ball mill it for 20 minutes to make a composite binder slurry.

[0055] (2) Weighing: 25 parts of 5-3mm high-purity sintered magnesia, 15 parts of 3-1mm high-purity sintered magnesia, 5 parts of 1-0.1mm high-purity sintered magnesia, 1-0.1mm high-iron high-purity magnesia 8 parts, 7 parts of 1-0.5mm fused magnesia-aluminum spinel, 20 parts of -325 mesh high-purity fused magnesia, 10 parts of <10μm active magnesia-aluminum spinel powder, 10 parts of nano-zinc oxide powder, composite binder slurry 3 copies.

[0056] (3) Fine powder co-grinding: put 20 parts of -325 mesh high-purity fused magnesia, 10 parts of <1...

Embodiment 3

[0063] The composition is the same as in Example 1, the firing temperature is 1600° C., and the other conditions of the preparation method are the same as in Example 1.

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Abstract

The invention belongs to the technical field of refractory products for high-temperature industrial kilns, relates to a refractory brick, and in particular, relates to a magnesium-iron-zinc-aluminum composite spinel refractory brick for a cement kiln firing zone and a preparation method of the magnesium-iron-zinc-aluminum composite spinel refractory brick. The magnesium-iron-zinc-aluminum composite spinel refractory brick for the cement kiln firing zone is composed of the following components in parts by weight: 15 to 25 parts of 5-3 mm high-purity magnesite clinker, 15 to 20 parts of 3-1 mm high-purity magnesite clinker, 5 to 10 parts of 1-0.1 mm high-purity magnesite clinker, 5 to 10 parts of 1-0.1 mm high-iron high-purity magnesite clinker, 5 to 10 parts of 1-0.5 mm fused magnesia-alumina spinel, 20 to 35 parts of high-purity fused magnesia, 5 to 12 parts of magnesia-alumina spinel micro powder, 3-10 parts of nano zinc oxide micro powder and 3-5 parts of a composite binding agent. The product prepared by the method has excellent kiln coating hanging performance, alkali corrosion resistance and thermal shock resistance stability, the using effect and the service life of the product are superior to those of traditional magnesia-chrome bricks and magnesia (ferrum) aluminate spinel bricks, and the product has important significance for prolonging the service life of a cement kiln and reducing unit consumption of refractory materials.

Description

technical field [0001] The invention belongs to the technical field of refractory products for high-temperature industrial kilns, and relates to a refractory brick, in particular to a magnesium-iron-zinc-aluminum composite spinel refractory brick for a cement kiln firing zone and a preparation method thereof. Background technique [0002] The fired refractory products used in the firing zone of cement kiln need to be chromium-free due to well-known reasons. However, the firing zones of chromium-free cement kilns are mainly made of various types of magnesium-aluminum and magnesium-iron-aluminum materials. It is difficult for these materials to achieve optimal thermal shock resistance and kiln skin hanging performance. MgO has excellent resistance to the erosion of cement kiln alkaline slag, but its thermal shock stability is poor and the performance of hanging the kiln skin is insufficient. The thermal shock resistance of magnesium-aluminum and magnesium-iron-aluminum spinel...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/043C04B35/622C04B35/63C04B35/632
CPCC04B35/043C04B35/622C04B35/6303C04B35/632C04B2235/9607C04B2235/96C04B2235/3418C04B2235/3208C04B2235/3217C04B2235/3272
Inventor 刘春福高海胡华李正柱
Owner 营口丰华耐火材料有限公司
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