CN110790578A - Refractory material and method for constructing kiln by using refractory material - Google Patents
Refractory material and method for constructing kiln by using refractory material Download PDFInfo
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- CN110790578A CN110790578A CN201911100171.0A CN201911100171A CN110790578A CN 110790578 A CN110790578 A CN 110790578A CN 201911100171 A CN201911100171 A CN 201911100171A CN 110790578 A CN110790578 A CN 110790578A
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- kiln
- refractory
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- 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
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1621—Making linings by using shaped elements, e.g. bricks
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention relates to the technical field of kiln building, in particular to a refractory material and a method for building a kiln by using the refractory material, wherein the refractory material comprises the following raw materials: the method comprises the following steps that an LZ-55 high-alumina brick +130mm heat-preservation pouring material +230mm NG-0.8 heat-preservation brick +80mm aluminum silicate refractory fiber felt is built in a segmented mode when the side wall of a kiln body is built, the kiln body is divided into a preheating section, a transition section, a high-temperature section, a sintering section and a cooling section from top to bottom, building is carried out from bottom to top during building, building materials are built in a staggered mode during building, the kiln body cannot have three or more than three layers of circular-to-circular seams, vertical through seams cannot be formed between two adjacent layers, the multilayer building cannot have inside and outside through seams, and the long edge of the brick on the uppermost layer of the kiln bottom is perpendicular to or forms a crossed angle with the flowing direction of materials or gas; the traditional brickwork joint flat building is changed into a lock net structure through the kiln building method, so that the firmness and the service cycle of the kiln body are prolonged.
Description
Technical Field
The invention relates to the technical field of kiln building, in particular to a refractory material and a method for building a kiln by using the refractory material.
Background
The lime kiln is a cave for burning lime at high temperature, and is used for calcining limestone to generate quicklime. The lime kiln mainly comprises a kiln body, a feeding device, a distributing device, an ash discharging device, a dust storage device and the like. Different forms of lime kilns differ in their structural form and in their calcined form.
At present, refractory materials are widely used in various kilns to achieve the effects of heat preservation, heat dissipation reduction and kiln collective protection, and the selection of refractory bricks and the building firmness are extremely important for the kilns. As most of the lime rotary kiln is built by fire clay in each stage, the fire clay has special requirements, and proper fire clay is generally selected according to the temperature and the requirements of each part, so that the phenomenon that the whole operation of the kiln is influenced because the fire clay is simply pursued to be made of the fire clay and cannot be matched with the temperature and the material box in the stage is avoided.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned deficiencies of the prior art and providing a refractory material.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a refractory material comprises the following raw materials: LZ-55 high-alumina brick, 130mm heat-insulating casting material, 230mmNG-0.8 heat-insulating brick and 80mm aluminum silicate refractory fiber felt.
Further, the high-alumina refractory mortar in the LZ-55 high-alumina brick is LN-55A.
Meanwhile, the invention provides a kiln building method by using the refractory material, which comprises the following steps:
1) material preparation
The refractory materials are stacked and marked according to specification, model, material and the like, an oil felt paper moisture-proof layer is laid on the refractory materials by using a template as a cushion, and the refractory materials are placed in a ventilated and rain-sheltering place;
2) cleaning of kiln body
Cleaning the kiln bottom and the kiln body;
3) kiln masonry
The side wall of the kiln body is built in sections when being built, the kiln body is divided into a preheating section, a transition section, a high-temperature section, a sintering section and a cooling section from top to bottom, and the side wall of the kiln body is built from bottom to top when being built;
carrying out pouring material masonry on a lime kiln body cooling section by using LZ-55 high-alumina bricks, and carrying out wet masonry construction by using fireclay for clay bricks, wherein the fire-resistant temperature is controlled at 1300-1400 ℃;
adopting an 80 aluminum silicate refractory fiber felt permanent heat insulation layer, dry-laying by using fireless mud, adding steel plates between bricks, firmly bonding the steel plates and materials together, and controlling the refractory temperature of a sintering section to be 1400-1500 ℃;
directly building an LZ-55 high-alumina brick, a 230mmNG-0.8 insulating brick and refractory mortar at 1300-1400 ℃ without a permanent heat-insulating layer to form a high-temperature section;
directly building an LZ-55 high-alumina brick and refractory mortar at 1200-1300 ℃, wherein the material has good thermal shock stability and material strength and is used as a filter section;
when in building, the building materials are constructed in staggered joints, the kiln body cannot have three or more than three layers of circular heavy joints, vertical through joints cannot be arranged between two adjacent layers, the multilayer building cannot have inside and outside through joints, and the long edge of the uppermost layer brick of the kiln bottom is vertical to the flowing direction of materials or gas or forms a crossed angle;
4) pointing
And (3) filling brick joints of the masonry with 130mm of heat-insulating castable, pointing the joints on the surface, wherein the plumpness of the heat-insulating castable is not less than 95%.
Further, the refractory mortar used in the step (3) is soaked in water for ageing 24 hours before use, and then construction water is added to adjust the refractory mortar.
Further, the particle size of the prepared refractory mortar should not be more than 50% of the brickwork joint, and water or cement should not be added arbitrarily in the prepared refractory mortar.
Furthermore, the construction water does not contain alkaline substances and oil stains.
Further, the machined surface and the defective surface of the refractory brick must not face the inner surface of the kiln body.
Compared with the prior art, the refractory material and the kiln building method thereof provided by the invention have the following effects: the building method changes the original building structure, the building body can not have three layers or three layers of ring heavy joints, the upper layer and the lower layer can not have vertical through joints, the multilayer building bricks can not have inner and outer through joints, and the traditional brick joint flat building is changed into a lock net structure.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following embodiments are described in further detail with reference to the following examples, which are provided for illustrating the present invention and are not intended to limit the scope of the present invention.
Example 1
The embodiment provides a refractory material, which comprises the following raw materials: the high-alumina refractory mortar comprises LZ-55 high-alumina bricks, 130mm heat-insulating castable, 230mmNG-0.8 heat-insulating bricks and 80mm aluminum silicate refractory fiber felt, wherein the high-alumina refractory mortar in the LZ-55 high-alumina bricks is LN-55A.
Example 2
The embodiment obviously provides a kiln building method using the refractory material, which comprises the following steps:
1) material preparation
The refractory materials are stacked and marked according to specification, model, material and the like, an oil felt paper moisture-proof layer is laid on the refractory materials by using a template as a cushion, and the refractory materials are placed in a ventilated and rain-sheltering place;
2) cleaning of kiln body
Cleaning the kiln bottom and the kiln body;
3) kiln masonry
The side wall of the kiln body is built in sections when being built, the kiln body is divided into a preheating section, a transition section, a high-temperature section, a sintering section and a cooling section from top to bottom, and the side wall of the kiln body is built from bottom to top when being built;
carrying out pouring material masonry on a lime kiln body cooling section by using LZ-55 high-alumina bricks, and carrying out wet masonry construction by using fireclay for clay bricks, wherein the fire-resistant temperature is controlled at 1300-1400 ℃;
adopting an 80 aluminum silicate refractory fiber felt permanent heat insulation layer, dry-laying by using fireless mud, adding steel plates between bricks, firmly bonding the steel plates and materials together, and controlling the refractory temperature of a sintering section to be 1400-1500 ℃;
directly building an LZ-55 high-alumina brick, a 230mmNG-0.8 insulating brick and refractory mortar at 1300-1400 ℃ without a permanent heat-insulating layer to form a high-temperature section;
directly building an LZ-55 high-alumina brick and refractory mortar at 1200-1300 ℃, wherein the material has good thermal shock stability and material strength and is used as a filter section;
when in building, the building materials are constructed in staggered joints, the kiln body cannot have three or more than three layers of circular heavy joints, vertical through joints cannot be arranged between two adjacent layers, the multilayer building cannot have inside and outside through joints, and the long edge of the uppermost layer brick of the kiln bottom is vertical to the flowing direction of materials or gas or forms a crossed angle;
4) pointing
And (3) filling brick joints of the masonry with 130mm of heat-insulating castable, pointing the joints on the surface, wherein the plumpness of the heat-insulating castable is not less than 95%.
In the process of building a kiln, the refractory mortar is soaked for ageing 24-36 hours before use, then construction water is added to adjust the refractory mortar to be refractory mortar, the particle size of the adjusted refractory mortar is not more than 50% of a brick joint, and water or cementing materials are not added into the adjusted refractory mortar at will. Secondly, the construction water in the kiln building process of the invention must not contain alkaline substances and oil stains, and the processed surface and the defective surface of the refractory brick must not face the inner surface of the kiln body.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (7)
1. A refractory material, characterized by: the method comprises the following raw materials: LZ-55 high-alumina brick, 130mm heat-insulating casting material, 230mmNG-0.8 heat-insulating brick and 80mm aluminum silicate refractory fiber felt.
2. A refractory according to claim 1, wherein: the high-alumina refractory mortar in the LZ-55 high-alumina brick is LN-55A.
3. A kiln construction method using the refractory according to any one of claims 1 to 2, characterized in that: the method comprises the following steps:
1) material preparation
The refractory materials are stacked and marked according to specification, model, material and the like, an oil felt paper moisture-proof layer is laid on the refractory materials by using a template as a cushion, and the refractory materials are placed in a ventilated and rain-sheltering place;
2) cleaning of kiln body
Cleaning the kiln bottom and the kiln body;
3) kiln masonry
The side wall of the kiln body is built in sections when being built, the kiln body is divided into a preheating section, a transition section, a high-temperature section, a sintering section and a cooling section from top to bottom, and the side wall of the kiln body is built from bottom to top when being built;
carrying out pouring material masonry on a lime kiln body cooling section by using LZ-55 high-alumina bricks, and carrying out wet masonry construction by using fireclay for clay bricks, wherein the fire-resistant temperature is controlled at 1300-1400 ℃;
adopting an 80 aluminum silicate refractory fiber felt permanent heat insulation layer, dry-laying by using fireless mud, adding steel plates between bricks, firmly bonding the steel plates and materials together, and controlling the refractory temperature of a sintering section to be 1400-1500 ℃;
directly building an LZ-55 high-alumina brick, a 230mmNG-0.8 insulating brick and refractory mortar at 1300-1400 ℃ without a permanent heat-insulating layer to form a high-temperature section;
directly building an LZ-55 high-alumina brick and refractory mortar at 1200-1300 ℃ to serve as a filter section;
when in building, the building materials are constructed in staggered joints, the kiln body cannot have three or more than three layers of circular heavy joints, vertical through joints cannot be arranged between two adjacent layers, the multilayer building cannot have inside and outside through joints, and the long edge of the uppermost layer brick of the kiln bottom is vertical to the flowing direction of materials or gas or forms a crossed angle;
4) pointing
And (3) filling brick joints of the masonry with 130mm of heat-insulating castable, pointing the joints on the surface, wherein the plumpness of the heat-insulating castable is not less than 95%.
4. The method for constructing a lime kiln as claimed in claim 1, wherein: and (4) soaking the refractory mortar used in the step (3) with water 24 hours before use, and adding construction water to prepare the refractory mortar.
5. The method for constructing a lime kiln as claimed in claim 4, wherein: the grain size of the prepared refractory mortar should not be more than 50% of the brick joints, and water or cementing materials should not be added into the prepared refractory mortar at will.
6. The method for constructing a lime kiln as claimed in claim 4, wherein: the construction water must not contain alkaline substances and oil stains.
7. The method for constructing a lime kiln as claimed in claim 1, wherein: the machined surface and the defective surface of the refractory brick must not face the inner surface of the kiln body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911100171.0A CN110790578A (en) | 2019-11-12 | 2019-11-12 | Refractory material and method for constructing kiln by using refractory material |
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| CN201911100171.0A CN110790578A (en) | 2019-11-12 | 2019-11-12 | Refractory material and method for constructing kiln by using refractory material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375466A (en) * | 2021-05-27 | 2021-09-10 | 南京钢铁股份有限公司 | Refractory material masonry method for double-D kiln connecting channel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205115303U (en) * | 2015-11-20 | 2016-03-30 | 河北新盈科创钙业股份有限公司 | Vertical limekiln |
| CN110228955A (en) * | 2019-05-17 | 2019-09-13 | 南京恒辉粉体技术工程有限公司 | Inner lining structure in a kind of major diameter lime shaft kiln kiln |
-
2019
- 2019-11-12 CN CN201911100171.0A patent/CN110790578A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205115303U (en) * | 2015-11-20 | 2016-03-30 | 河北新盈科创钙业股份有限公司 | Vertical limekiln |
| CN110228955A (en) * | 2019-05-17 | 2019-09-13 | 南京恒辉粉体技术工程有限公司 | Inner lining structure in a kind of major diameter lime shaft kiln kiln |
Non-Patent Citations (1)
| Title |
|---|
| 化学工业部工业炉设计技术中心站主编: "《HG/T 2064-98石灰窑砌筑技术条件》", 1 May 1998 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375466A (en) * | 2021-05-27 | 2021-09-10 | 南京钢铁股份有限公司 | Refractory material masonry method for double-D kiln connecting channel |
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Inventor after: Cui Shengyang Inventor after: Ma Chengdong Inventor after: Zhang Haixiong Inventor after: Ye Faming Inventor after: Bao Shanyu Inventor after: Kui Minghai Inventor after: Chen Wenqing Inventor after: Guo Guimei Inventor before: Cui Shengyang Inventor before: Ma Chengdong Inventor before: Feng Hongcang Inventor before: Kui Minghai Inventor before: Chen Wenqing Inventor before: Bao Shanyu Inventor before: Li Huiying |