CN112159203B - Corrosion-resistant composite smoke-discharging brick - Google Patents

Corrosion-resistant composite smoke-discharging brick Download PDF

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CN112159203B
CN112159203B CN202010929854.3A CN202010929854A CN112159203B CN 112159203 B CN112159203 B CN 112159203B CN 202010929854 A CN202010929854 A CN 202010929854A CN 112159203 B CN112159203 B CN 112159203B
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layer
weight
temperature
brick body
parts
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CN112159203A (en
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廖佳
殷波
范昌龙
宋晓春
徐勇
毛旭敏
周韬
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Yixing Morgan Thermal Ceramics Co ltd
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Yixing Morgan Thermal Ceramics Co ltd
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    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
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Abstract

The invention discloses an anti-erosion composite smoke-discharging brick, wherein the brick body comprises three layers of components, the upper layer is an alkali-resistant layer, the middle layer is a light brick body, and the bottom layer is a casting material layer. Meanwhile, the invention also discloses a preparation method of the anti-erosion composite smoke exhaust brick. The components of the invention have low cost, the preparation process is environment-friendly, and the energy consumption is low; the upper layer of the brick body is an alkali-resistant layer which is mainly arranged aiming at the characteristics of heavy metals, so that the characteristics of the brick body for resisting the heavy metals and heavy metal alkali are improved; the middle layer of the brick body is made of light brick bodies, and due to the characteristic of good permeability, the impact force of the brick body on flue gas can be relieved; the bottom layer of the brick body is a casting material layer, so that the brick body is convenient to be combined with bricks of the kiln body.

Description

Corrosion-resistant composite smoke-discharging brick
Technical Field
The invention belongs to the field of refractory materials, and particularly relates to a composite smoke exhaust brick with good corrosion resistance and high strength.
Background
At present, the country pays more and more attention to environmental control and energy conservation and emission reduction in production, therefore, in the field of fire resistance, many manufacturers use some waste materials as raw materials, the waste materials are combined with certain heavy metal elements more or less in the original production process or subsequent use, so that smoke generated in the production process has the conditions of high corrosivity and large thermal shock, the smoke-discharging bricks used in the existing kiln are generally silicon carbide bricks or silicon nitride bricks, the bricks of the types have light mass but have defects of corrosion resistance and thermal shock resistance, the service life is short, and the production cost is not favorably controlled by enterprises.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a composite smoke exhaust brick with good corrosion resistance and high strength aiming at the defects of the prior art.
The technical scheme is as follows: in order to achieve the above object, the present invention is specifically completed by: an erosion-resistant composite smoke-discharging brick comprises an upper layer which is an alkali-resistant layer, a middle layer which is a light brick body and a bottom layer which is a castable layer.
The alkali-resistant layer, the light brick body and the casting material layer have the thickness proportion of 3 to 5.
The alkali-resistant layer is composed of 40-50 parts by weight of dolomite, 30-40 parts by weight of clay, 20-30 parts by weight of kaolin and 10-40 parts by weight of asphalt.
The light brick comprises 20-50 parts by weight of magnesium oxide, 20-30 parts by weight of kaolin and 5-10 parts by weight of fly ash.
The pouring material layer is formed by mixing Portland cement, silicon carbide powder and silicon oxide powder according to a weight ratio of 5.
The method for preparing the anti-erosion composite smoke exhaust brick comprises the following steps:
(1) Forming the light brick body through a mold, drying at 50-60 ℃, and standing for 1-2h;
(2) Carrying out compound shaping on the light brick, the alkali-resistant layer and the casting material layer in a mould, drying at 70-80 ℃, and cutting a semi-finished product subjected to compound shaping into a cuboid shape by a cutting machine;
(3) Pushing the cut semi-finished product into a rotary kiln for roasting, heating twice, controlling the temperature of a first heating point to 1350 ℃, controlling the temperature to carry out constant-temperature roasting for 12 to 24h when the temperature of the kiln reaches the heating point, continuously heating to 1650 ℃ after the temperature is reached, and carrying out constant-temperature roasting for 24 to 48 hours after the temperature is reached;
(4) Stopping roasting after the second roasting is finished, pushing the smoke-discharging bricks out of the kiln after the kiln is cooled to 500 ℃, and cooling the smoke-discharging bricks to room temperature by water cooling with clear water in a spraying mode from the upper part of the smoke-discharging bricks;
(5) And (5) placing the mixture in a ventilated place for 5 to 7 days to obtain the product.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) The components have low cost, the preparation process is environment-friendly, and the energy consumption is low;
(2) The upper layer of the brick body is an alkali-resistant layer which is mainly arranged aiming at the characteristics of heavy metals, so that the characteristics of the brick body for resisting the heavy metals and heavy metal alkali are improved;
(3) The middle layer of the brick body is made of light brick bodies, and due to the characteristic of good permeability, the impact force of the brick body on flue gas can be relieved;
(4) The bottom layer of the brick body is a casting material layer, so that the brick body is convenient to be combined with bricks of the kiln body.
The specific implementation mode is as follows:
example 1:
the method for preparing the erosion-resistant composite smoke-discharging brick comprises the following steps: forming the light brick body by a mould, drying at 60 ℃, and standing for 1h; carrying out composite shaping on the light brick, the alkali-resistant layer and the casting material layer in a mould, then drying at 70 ℃, and cutting a semi-finished product subjected to composite shaping into a cuboid shape by a cutting machine; pushing the cut semi-finished product into a rotary kiln for roasting, wherein the roasting is heated in two times, the temperature of a first heating point is controlled to be 1350 ℃, the temperature is controlled to be constant for roasting for 24 hours after the temperature of the kiln reaches the heating point, the temperature is continuously raised to a second heating point 1650 ℃ after the roasting is finished, and the constant temperature is roasted for 48 hours after the temperature reaches the second heating point; stopping roasting after the second roasting is finished, pushing the smoke-discharging bricks out of the kiln after the kiln is cooled to 500 ℃, and performing water cooling on the smoke-discharging bricks by using clear water in a spraying mode to cool the smoke-discharging bricks to room temperature; and (5) placing the mixture in a ventilated place for 5 to 7 days to obtain the product.
The brick body comprises three layers of components, wherein the upper layer is an alkali-resistant layer, the middle layer is a light brick body, and the bottom layer is a castable layer.
The thickness proportion of the pouring material layer of the alkali-resistant layer and the light brick body is 5; the alkali-resistant layer consists of 40 parts by weight of dolomite, 30 parts by weight of clay, 20 parts by weight of kaolin and 10 parts by weight of asphalt; the light brick body comprises 20 parts by weight of magnesium oxide, 20 parts by weight of kaolin and 5 parts by weight of fly ash; the pouring material layer is formed by mixing Portland cement, silicon carbide powder and silicon oxide powder according to the weight ratio of 5.
Example 2:
the method for preparing the erosion-resistant composite smoke-discharging brick comprises the following steps: forming the light brick body by a mould, drying at the temperature of 60 ℃, and standing for 1h; carrying out composite shaping on the light brick, the alkali-resistant layer and the casting material layer in a mould, then drying at 80 ℃, and cutting a semi-finished product subjected to composite shaping into a cuboid shape by a cutting machine; pushing the cut semi-finished product into a rotary kiln for roasting, wherein the roasting is carried out by heating for two times, the temperature of a first heating point is controlled to 1350 ℃, the temperature is controlled for constant-temperature roasting for 12 hours after the temperature of the kiln reaches the heating point, the temperature is continuously increased to 1650 ℃ after the roasting is finished, and the constant-temperature roasting is carried out for 24 hours after the temperature reaches the second heating point; stopping roasting after the second roasting is finished, pushing the smoke-discharging bricks out of the kiln after the kiln is cooled to 500 ℃, and performing water cooling on the smoke-discharging bricks by using clear water in a spraying mode to cool the smoke-discharging bricks to room temperature; and (5) placing the mixture in a ventilated place for 5 to 7 days to obtain the product.
The brick body comprises three layers of components, wherein the upper layer is an alkali-resistant layer, the middle layer is a light brick body, and the bottom layer is a castable layer.
The thickness proportion of the pouring material layer is 3:10: 2; the alkali-resistant layer consists of 50 parts by weight of dolomite, 40 parts by weight of clay, 30 parts by weight of kaolin and 40 parts by weight of asphalt; the light brick body comprises 50 parts by weight of magnesium oxide, 30 parts by weight of kaolin and 10 parts by weight of fly ash; the pouring material layer is formed by mixing Portland cement, silicon carbide powder and silicon oxide powder according to the weight ratio of 5.
Example 3:
the method for preparing the erosion-resistant composite smoke-discharging brick comprises the following steps: forming the light brick body by a mould, drying at 50 ℃, and standing for 2h; carrying out composite shaping on the light brick, the alkali-resistant layer and the casting material layer in a mould, then drying at 70 ℃, and cutting a semi-finished product subjected to composite shaping into a cuboid shape by a cutting machine; pushing the cut semi-finished product into a rotary kiln for roasting, wherein the roasting is carried out by heating for two times, the temperature of a first heating point is controlled to 1350 ℃, the temperature is controlled for constant-temperature roasting for 18 hours after the temperature of the kiln reaches the heating point, the temperature is continuously increased to 1650 ℃ after the roasting is finished, and the constant-temperature roasting is carried out for 36 hours after the temperature reaches the second heating point; stopping roasting after the second roasting is finished, pushing the smoke-discharging bricks out of the kiln after the kiln is cooled to 500 ℃, and cooling the smoke-discharging bricks to room temperature by water cooling with clear water in a spraying mode from the upper part of the smoke-discharging bricks; and (5) placing the mixture in a ventilated place for 5 to 7 days to obtain the product.
The brick body comprises three layers of components, wherein the upper layer is an alkali-resistant layer, the middle layer is a light brick body, and the bottom layer is a castable layer.
The thickness proportion of the alkali-resistant layer to the light brick body is 4; the alkali-resistant layer consists of 45 parts by weight of dolomite, 35 parts by weight of clay, 25 parts by weight of kaolin and 20 parts by weight of asphalt; the light brick body comprises 35 parts by weight of magnesium oxide, 25 parts by weight of kaolin and 8 parts by weight of fly ash; the pouring material layer is formed by mixing portland cement, silicon carbide powder and silicon oxide powder according to the weight ratio of 5.
Example 4:
the method for preparing the erosion-resistant composite smoke-discharging brick comprises the following steps: forming the light brick body by a mould, drying at 60 ℃, and standing for 1h; carrying out composite shaping on the light brick, the alkali-resistant layer and the casting material layer in a mould, then drying at 80 ℃, and cutting a semi-finished product subjected to composite shaping into a cuboid shape by a cutting machine; pushing the cut semi-finished product into a rotary kiln for roasting, wherein the roasting is carried out by heating for two times, the temperature of a first heating point is controlled to 1350 ℃, the temperature is controlled for constant-temperature roasting for 20 hours after the temperature of the kiln reaches the heating point, the temperature is continuously increased to 1650 ℃ after the roasting is finished, and the constant-temperature roasting is carried out for 30 hours after the temperature reaches the second heating point; stopping roasting after the second roasting is finished, pushing the smoke-discharging bricks out of the kiln after the kiln is cooled to 500 ℃, and performing water cooling on the smoke-discharging bricks by using clear water in a spraying mode to cool the smoke-discharging bricks to room temperature; and (5) placing the mixture in a ventilated place for 5 to 7 days to obtain the product.
The brick body comprises three layers of components, wherein the upper layer is an alkali-resistant layer, the middle layer is a light brick body, and the bottom layer is a castable layer.
The thickness proportion of the alkali-resistant layer to the light brick body is 3; the alkali-resistant layer consists of 42 parts by weight of dolomite, 36 parts by weight of clay, 24 parts by weight of kaolin and 30 parts by weight of asphalt; the light brick body comprises 25 parts by weight of magnesium oxide, 28 parts by weight of kaolin and 6 parts by weight of fly ash; the pouring material layer is formed by mixing Portland cement, silicon carbide powder and silicon oxide powder according to the weight ratio of 5.
Example 5:
the method for preparing the erosion-resistant composite smoke-discharging brick comprises the following steps: forming the light brick body by a mould, drying at 50 ℃, and standing for 2h; carrying out composite shaping on the light brick, the alkali-resistant layer and the casting material layer in a mould, then drying at 70 ℃, and cutting a semi-finished product subjected to composite shaping into a cuboid shape by a cutting machine; pushing the cut semi-finished product into a rotary kiln for roasting, wherein the roasting is carried out by heating for two times, the temperature of a first heating point is controlled to 1350 ℃, the temperature is controlled for constant-temperature roasting for 20 hours after the temperature of the kiln reaches the heating point, the temperature is continuously increased to 1650 ℃ after the roasting is finished, and the constant-temperature roasting is carried out for 40 hours after the temperature reaches the second heating point; stopping roasting after the second roasting is finished, pushing the smoke-discharging bricks out of the kiln after the kiln is cooled to 500 ℃, and cooling the smoke-discharging bricks to room temperature by water cooling with clear water in a spraying mode from the upper part of the smoke-discharging bricks; and (5) placing the mixture in a ventilated place for 5 to 7 days to obtain the product.
The brick body comprises three layers of components, wherein the upper layer is an alkali-resistant layer, the middle layer is a light brick body, and the bottom layer is a castable layer.
The thickness proportion of the alkali-resistant layer to the light brick body is 4; the alkali-resistant layer consists of 48 parts by weight of dolomite, 36 parts by weight of clay, 28 parts by weight of kaolin and 35 parts by weight of asphalt; the light brick body comprises 45 parts by weight of magnesium oxide, 28 parts by weight of kaolin and 9 parts by weight of fly ash; the pouring material layer is formed by mixing portland cement, silicon carbide powder and silicon oxide powder according to the weight ratio of 5.

Claims (3)

1. An erosion-resistant composite smoke-discharging brick is characterized in that a brick body comprises three layers of components, wherein the upper layer is an alkali-resistant layer, the middle layer is a light brick body, and the bottom layer is a castable layer; the alkali-resistant layer is composed of 40-50 parts by weight of dolomite, 30-40 parts by weight of clay, 20-30 parts by weight of kaolin and 10-40 parts by weight of asphalt, the light brick body comprises 20-50 parts by weight of magnesium oxide, 20-30 parts by weight of kaolin and 5-10 parts by weight of fly ash, and the castable layer is formed by mixing silicate cement, silicon carbide powder and silicon oxide powder according to a weight ratio of 5.
2. The erosion-resistant composite smoke exhaust brick according to claim 1, wherein the thickness ratio of the alkali-resistant layer to the light brick body to the castable layer is 3 to 5.
3. The method for preparing the erosion-resistant composite smoke discharging brick as claimed in any one of claims 1 to 2, which is characterized by comprising the following steps of:
(1) Forming the light brick body through a mold, drying at 50-60 ℃, and standing for 1-2h;
(2) Carrying out compound shaping on the lightweight brick, the alkali-resistant layer and the casting material layer in a mould, drying at 70-80 ℃, and cutting a semi-finished product subjected to compound shaping into a cuboid shape by a cutting machine;
(3) Pushing the cut semi-finished product into a rotary kiln for roasting, heating twice, controlling the temperature of a first heating point to 1350 ℃, controlling the temperature to carry out constant-temperature roasting for 12 to 24h when the temperature of the kiln reaches the heating point, continuously heating to 1650 ℃ after the temperature is reached, and carrying out constant-temperature roasting for 24 to 48 hours after the temperature is reached;
(4) Stopping roasting after the second roasting is finished, pushing the smoke-discharging bricks out of the kiln after the kiln is cooled to 500 ℃, and performing water cooling on the smoke-discharging bricks by using clear water in a spraying mode to cool the smoke-discharging bricks to room temperature;
(5) And (5) placing the mixture in a ventilated place for 5 to 7 days to obtain the product.
CN202010929854.3A 2020-09-07 2020-09-07 Corrosion-resistant composite smoke-discharging brick Active CN112159203B (en)

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GB1564611A (en) * 1975-09-19 1980-04-10 Holter Patentverwert Refractory compostions
DE19543430A1 (en) * 1995-11-22 1997-05-28 Vgt Industriekeramik Gmbh Double layer heat insulating lining brick
JPH1112050A (en) * 1997-06-19 1999-01-19 Toshiba Corp Laminated ceramic and its production
CN1871187A (en) * 2003-09-11 2006-11-29 阿肖克·阿南特·甘普乐 Multi-layered tile or block
CN101535212A (en) * 2006-11-06 2009-09-16 黑崎播磨株式会社 Durable sleeve bricks

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