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

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

Example Embodiment

[0042] Example 1.

[0043] The preparation method of a cement kiln firing belt is used as follows.

[0044] (1) Preparation of composite binding agent: 3 of magnesium chloride, 10 parts of polymerization of aluminum chloride, 3 lignozoulfonate, 80 water were added. Put the small polyurethane tank for 20 minutes to make a composite binding slurry.

[0045] (2) Weigh 20-5-3mm high purity sintered magnesium sand, 3-1mm high purity sintered magnesium sand 20 parts, 1-0.1mm high purity sintered magnesium sand 10 parts, 1-0.1mm high-speed wire high-pure magnesium sand 5 parts, 1-0.5mm Electric Melmic Melt, 5 parts, -325 high purity electric meltrazide sand 27 parts, <10 μM active magnesium perimeter micropowder 5 parts, 5 parts of nano-zinc powder, composite binding slurry 5 copies.

[0046] (3) Fine powder co-grinding: 27 pieces of high purity electric meltlad magnesium sand, 8 parts of <10 μM active magnesium aluminum tip fine powder, 5 parts of zinc oxide fine powder, and loaded into...

Example Embodiment

[0052] Example 2.

[0053] The preparation method of a cement kiln firing belt is used as follows.

[0054] (1) Preparation of composite binding: 10 parts of magnesium chloride, 9 copolymerized aluminum chloride, 2 lignozoate sulfonate, 82 parts of water. Put the small polyurethane tank for 20 minutes to make a composite binding slurry.

[0055] (2) Weighing: 5-3mm high purity sintered magnesium sand, 15 parts of 3-1mm high purity sintered magnesium sand, 1-0.1mm high purity sintered magnesium sand 5 parts, 1-0.1mm high-speed rail high-purity magnesium sand 8 parts, 1-0.5mm Electric Melmic Aluminum Peppermite 7 parts, -325 THE Polymetallic Melt Magnesium Sand 20 parts, 10 μm Active Magnesium Metal Tin Fed, 10 parts, 10 parts of nano-zinc fine powder, composite binding slurry 3 copies.

[0056] (3) Fine powder co-grinding: 20 parts of the -325 high purity electric meltraminated sand, 10 parts of 10 μm active magnesium perimeter, 10 parts of nano-zinc oxide, and loaded into the ball...

Example Embodiment

[0062] Example 3.

[0063] In the same manner as in Example 1, the firing temperature of 1600 ° C, the preparation method, other conditions 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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