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Energy-saving mullite refractory brick for cement kiln transition zone, and production method thereof

A mullite and transition zone technology, which is applied in the field of energy-saving mullite refractory bricks and its preparation, can solve the problems of unfavorable high-temperature mechanical properties, hexavalent chromium pollution environment, low thermal conductivity, etc., to reduce erosion channels, Low cost and improved energy saving effect

Inactive Publication Date: 2020-04-07
ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The Chinese patent with the patent number ZL201610637867.7 discloses a mullite silicon carbide composite refractory material and its preparation method, which uses coatings to coat lightweight mullite aggregates and coatings to coat silicon carbide aggregates and other raw materials A mullite silicon carbide refractory material with low thermal conductivity was prepared. However, spodumene and other low-melting raw materials were used in the coating process, which is not conducive to high-temperature mechanical properties.
The Chinese patent application with the application number 201711253662.X discloses a boron nitride composite magnesium-aluminum spinel brick for corrosion-resistant cement kiln transition zone and its preparation method, providing a cement kiln transition zone with good corrosion resistance The main defect is the introduction of chromium, and the hexavalent chromium formed during use pollutes the environment.
The Chinese patent application with application number 201710979456.0 discloses a corundum refractory brick with low thermal conductivity and high corrosion resistance and its preparation method. Calcium hexaaluminate and other raw materials are used to produce low thermal conductivity refractory bricks for the transition zone of cement kilns, but a large amount of Rare metal oxides are expensive

Method used

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  • Energy-saving mullite refractory brick for cement kiln transition zone, and production method thereof
  • Energy-saving mullite refractory brick for cement kiln transition zone, and production method thereof
  • Energy-saving mullite refractory brick for cement kiln transition zone, and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] An energy-saving mullite refractory brick used in the transition zone of a cement kiln, comprising the following components and parts by weight:

[0027]

[0028] Wherein, the pretreated mullite porous aggregate Al 2 o 3 The mass percentage content is not less than 70%; the bulk density is not more than 1.65g / cm 3 The apparent porosity is not less than 40%; the compressive strength is not less than 60Mpa, and the preparation method of the pretreated mullite porous aggregate is to soak the mullite porous aggregate in an alumina sol with a solid content of not less than 30% , the soaking time is 12 hours, the soaked mullite porous aggregate is filtered, and dried at 200°C to obtain the pretreated mullite porous aggregate.

[0029] The above-mentioned preparation method of the energy-saving mullite refractory brick used in the transition zone of a cement kiln comprises the following steps:

[0030] A. Ingredients: Mix the pretreated mullite porous aggregate, granules...

Embodiment 2

[0034] An energy-saving mullite refractory brick used in the transition zone of a cement kiln, comprising the following components and parts by weight:

[0035]

[0036] Wherein, the pretreated mullite porous aggregate Al 2 o 3 The mass percentage content is not less than 70%; the bulk density is not more than 1.65g / cm 3 The apparent porosity is not less than 40%; the compressive strength is not less than 60Mpa, and the preparation method of the pretreated mullite porous aggregate is to soak the mullite porous aggregate in an alumina sol with a solid content of not less than 30% , the soaking time is 12 hours, the soaked mullite porous aggregate is filtered, and dried at 200°C to obtain the pretreated mullite porous aggregate.

[0037] The above-mentioned preparation method of the energy-saving mullite refractory brick used in the transition zone of a cement kiln comprises the following steps:

[0038] A. Ingredients: Mix the pretreated mullite porous aggregate, granules...

Embodiment 3

[0042] An energy-saving mullite refractory brick used in the transition zone of a cement kiln, comprising the following components and parts by weight:

[0043]

[0044] Wherein, the pretreated mullite porous aggregate Al 2 o 3 The mass percentage content is not less than 70%; the bulk density is not more than 1.65g / cm 3 The apparent porosity is not less than 40%; the compressive strength is not less than 60Mpa, and the preparation method of the pretreated mullite porous aggregate is to soak the mullite porous aggregate in an alumina sol with a solid content of not less than 30% , the soaking time is 12 hours, the soaked mullite porous aggregate is filtered, and dried at 200°C to obtain the pretreated mullite porous aggregate.

[0045] The above-mentioned preparation method of the energy-saving mullite refractory brick used in the transition zone of a cement kiln comprises the following steps:

[0046] A. Ingredients: Mix the pretreated mullite porous aggregate, granules...

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Abstract

The invention relates to an energy-saving mullite refractory brick for a cement kiln transition zone. The refractory brick comprises, by weight, 40-50 parts of pretreated mullite porous aggregates, 10-15 parts of silicon carbide particles, 10-15 parts of fine zirconite powder, 10-15 parts of fine tabular corundum powder, 5-10 parts of aluminum oxide powder, 4-8 parts of Si powder, 1-3 parts of Alpowder and 4-8 parts of a binding agent. A production method of the refractory brick comprises the steps of burdening, forming, drying and sintering. The production method is simple, and the producedrefractory brick has the advantages of low cost, environmental friendliness and good energy-saving effect.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an energy-saving mullite refractory brick used in the transition zone of a cement kiln and a preparation method thereof. Background technique [0002] Cement is widely used in industrial construction, civil construction, traffic engineering, cement engineering, seaport engineering, nuclear power engineering, national defense construction and other new industries and engineering construction. It is an indispensable and important basic material in national engineering construction and people's life. The new dry cement manufacturing process is gradually replacing the wet, old dry and semi-dry production processes with its high efficiency and homogenization, as well as its outstanding advantages in control and management, and has become the mainstream development direction of the modern cement industry. . As one of the main energy-consuming equipment of the ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/185C04B38/08C04B35/622C04B35/628
CPCC04B35/66C04B35/185C04B38/08C04B35/622C04B35/62886C04B2235/3826C04B2235/3248C04B2235/3217C04B2235/428C04B2235/402C04B2235/96C04B2235/9607
Inventor 向若飞朱国平王立旺朱其良王琪李新明彭晶晶
Owner ZHEJIANG KINGCRED NEW MATERIAL CO LTD