CN113758271A - Masonry method of rotary furnace refractory bricks - Google Patents
Masonry method of rotary furnace refractory bricks Download PDFInfo
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- CN113758271A CN113758271A CN202111161233.6A CN202111161233A CN113758271A CN 113758271 A CN113758271 A CN 113758271A CN 202111161233 A CN202111161233 A CN 202111161233A CN 113758271 A CN113758271 A CN 113758271A
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- refractory brick
- rotary furnace
- wall
- firebricks
- refractory
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- 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
- F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
- F27D1/045—Bricks for lining cylindrical bodies, e.g. skids, tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention discloses a masonry method of rotary furnace refractory bricks, which comprises the following steps: firstly, selecting refractory bricks made of the same material; step two, the firebricks are combined and built on the inner wall of the rotary furnace to form a heat-resistant cylinder (1) with the inner wall; step three, a plurality of annular bosses (2) are arranged on the inner wall of the inner wall heat-resistant cylinder (1) in the circumferential direction, two ends of the same annular boss (2) in the length direction are not on the same horizontal straight line, and the plurality of annular bosses (2) are in a rotational flow shape; the refractory brick has the characteristics of high temperature resistance and acid and alkali resistance; the firebricks are at least three different heights, and the heights of the firebricks are 200-400 mm. The invention has the advantages of improving the burnout rate of solid wastes and prolonging the service cycle of the refractory bricks.
Description
Technical Field
The invention relates to the field of cement kiln cooperative treatment, in particular to a masonry method of rotary kiln refractory bricks.
Background
The existing kiln lining plays a role in protecting a cylinder from being damaged by high temperature, insulating heat and reducing heat dissipation loss in the rotary kiln in the cement clinker manufacturing process. The material for kiln lining is refractory material, which is inorganic non-metal material with refractoriness over 1500 deg.c and includes natural ore and various products produced through certain technological process according to certain requirement. According to the characteristics of physicochemical reaction in the rotary kiln, the kiln is generally divided into a decomposition zone, an upper transition zone, a burning zone, a lower transition zone, a cooling zone and the like, refractory bricks used in various zones are made of different materials, and the same material is divided into various specifications. The existing refractory brick masonry methods mainly comprise flat masonry and patterned masonry.
The rotary kiln refractory bricks are mostly laid flat and directly or laid in a flower, and the rotary kiln has long length, solid-liquid phase reaction exists in the kiln, and the flow rate of irregular kiln skin materials is relatively low, so that the rotary kiln refractory bricks are generally considered to be about 20 minutes. The rotary kiln is short in design length, usually only 1/6-1/5 of the rotary kiln is used, the existing mode of tiling or paving is adopted in the rotary kiln, the advancing speed of solid wastes in the rotary kiln is high, and the burnout rate of the solid wastes is reduced. In order to take account of the characteristics of heat insulation, kiln coating hanging and the like, the conventional rotary kiln selects a refractory brick material with more specifications, has larger differences of physicochemical properties such as expansion coefficient and thermal shock property of refractory bricks used for a decomposition zone and a burning zone, is difficult to unify, and has poorer adaptability to acid and alkali. The rotary furnace is used as an important thermal equipment for cooperative treatment, the acid-base concentration of the refractory bricks in contact with the rotary furnace is high, and the refractory bricks are selected according to the prior art, so that the service cycle of the refractory materials of the rotary furnace is difficult to guarantee.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a masonry method of rotary furnace refractory bricks, which selects refractory bricks with better acid and alkali resistance and utilizes refractory bricks with different specifications and models to combine and masonry, so that the advancing speed of materials is favorably slowed down, the time of solid wastes in the rotary furnace is prolonged, and the burnout rate of the solid wastes is improved.
The purpose of the invention is realized by the following technical scheme:
a masonry method of rotary furnace refractory bricks comprises the following steps:
firstly, selecting refractory bricks made of the same material;
step two, the firebricks are combined and built on the inner wall of the rotary furnace to form a heat-resistant cylinder with the inner wall;
and step three, a plurality of annular bosses are arranged on the inner wall of the inner wall heat-resistant cylinder in the circumferential direction, two ends of the same annular boss in the length direction are not on the same horizontal straight line, and the plurality of annular bosses are in a rotational flow shape.
Further, the refractory brick has the characteristics of high temperature resistance and acid and alkali resistance.
Furthermore, the firebricks are at least three different heights, and the heights of the firebricks are 200-400 mm.
Furthermore, the circumferential bosses are formed by building refractory bricks with different heights.
Furthermore, the annular bosses are built through staggered building.
Furthermore, the rotational flow direction of the rotational flow shape is opposite to the rotation direction of the rotary furnace.
Furthermore, the number of the circumferential bosses in the inner wall heat-resistant cylinder is specifically 4-8.
The invention has the beneficial effects that:
1. compared with the existing refractory brick masonry of the rotary kiln, the refractory bricks with different height specifications are selected for combined masonry to form a plurality of annular bosses, the annular bosses are beneficial to the height lifting of materials in the rotary kiln, and the advancing speed of the materials in the rotary kiln is favorably slowed down through the fact that the rotational flow direction of the annular bosses is opposite to the rotation direction of the rotary kiln and the arrangement of the step structures of the annular bosses is matched, so that the time of solid wastes in the rotary kiln is prolonged, and the burnout rate of the solid wastes is improved;
2. compared with the existing rotary kiln, the rotary kiln has the advantages that only one refractory brick is selected, and the refractory bricks made of multiple materials are not required to be selected like the rotary kiln, so that the consumption and the inventory cost of the refractory bricks are reduced, and the service life of the refractory bricks is prolonged.
Drawings
FIG. 1 is a schematic structural view of an inner wall heat-resistant cylinder;
FIG. 2 is a side view of an inner wall heat resistant cartridge;
FIG. 3 is a cross-sectional view of an inner wall heat resistant cartridge;
fig. 4 is a cross-sectional view of an inner wall heat resistant cartridge.
In the figure, 1-inner wall heat-resistant cylinder and 2-annular boss.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the first embodiment, the masonry method of the rotary furnace refractory brick comprises the following steps:
firstly, selecting refractory bricks made of the same material;
step two, the firebricks are combined and built on the inner wall of the rotary furnace to form an inner wall heat-resistant cylinder 1;
and step three, a plurality of annular bosses 2 are arranged on the inner wall of the inner wall heat-resistant cylinder 1 in the circumferential direction, two ends of the same annular boss 2 in the length direction are not on the same horizontal straight line, and the plurality of annular bosses 2 are in a rotational flow shape.
In the embodiment, the rotary furnace is applied to a solid waste treatment system, the rotary furnace is a furnace body which is obliquely implanted between a tertiary air pipe and a cement kiln decomposing furnace and is specially used for cooperatively treating solid waste for the cement kiln, and the solid waste is conveyed by rotating the rotary furnace;
the invention is further configured to: the refractory brick has the characteristics of high temperature resistance and acid and alkali resistance.
In the embodiment, the refractory bricks are silicon mullite red bricks; the firebricks are made of one material, and the firebricks with better acid and alkali resistance are selected, so that the service cycle of the firebricks is prolonged, and the masonry loss and the inventory cost of the firebricks can be reduced.
The invention is further configured to: the refractory bricks are selected from at least three different heights.
In this embodiment, the firebricks are made of four different heights, namely a first firebrick, a second firebrick, a third firebrick and a fourth firebrick, and the heights are: 200mm, 260mm, 310mm and 360 mm.
The invention is further configured to: the annular boss 2 is formed by building refractory bricks with different heights.
The whole rotary furnace can be built or one section of the rotary furnace can be built according to requirements so as to improve the material rolling times and reduce the material advancing speed. The circumferential boss 2 is built according to the combination of low, medium, high, medium and low by selecting refractory bricks with different height specifications and using 2-3 refractory bricks as a group, so that a boss structure with a certain symmetrical structure is formed in the circumferential direction of the rotary furnace.
In the embodiment, the outer side walls of the first refractory brick, the second refractory brick, the third refractory brick and the fourth refractory brick form a flat cylindrical wall surface; the annular boss 2 is formed by a second refractory brick, a third refractory brick and a fourth refractory brick, the second refractory brick and the third refractory brick are respectively positioned on two sides of the fourth refractory brick in the circumferential direction, and the convex sides of the second refractory brick and the third refractory brick form a step structure between the fourth refractory brick and the first refractory brick; the circumferential bosses 2 are composed of a second refractory brick, a fourth refractory brick and a third refractory brick, and the first refractory brick is used for filling the seams between the circumferential bosses 2.
The invention is further configured to: the annular bosses 2 are built by staggered building.
In this embodiment, the staggered building means that the axial stitches formed on the circumferential boss 2 are not on one line, the axial stitches include a first stitch between the first refractory brick and the second refractory brick, a second stitch between the second refractory brick and the fourth refractory brick, a third stitch between the fourth refractory brick and the third refractory brick, and a fourth stitch between the third refractory brick and the first refractory brick, and the first stitch, the second stitch, the third stitch and the fourth stitch are divided into a plurality of small-segment stitches, and the small-segment stitches on the same stitch are located on different horizontal lines.
The invention is further configured to: the rotational flow direction of the rotational flow shape is opposite to the rotational direction of the rotary furnace.
If the rotational flow direction is the same as the rotation direction of the rotary furnace, the advancing speed of the material is accelerated.
In the embodiment, the swirling flow shape is similar to a stretched spring, the swirling flow direction is opposite to the rotation direction of the rotary furnace, and the arrangement of the step structure of the annular boss 2 is matched, so that the advancing speed of materials in the rotary furnace is favorably slowed down, the time of solid wastes in the rotary furnace is prolonged, and the burnout rate of the solid wastes is improved.
The invention is further configured to: the number of the circumferential bosses 2 in the inner wall heat-resistant cylinder 1 is specifically 4. The specific number of the annular bosses 2 is set according to the rotary furnaces with different diameter specifications.
Fig. 1 to 4 are schematic structural diagrams of the inner wall heat-resistant cylinder built by the method.
The second embodiment discloses a masonry method of rotary furnace refractory bricks, which comprises the following steps:
firstly, selecting refractory bricks made of the same material;
step two, the firebricks are combined and built on the inner wall of the rotary furnace to form an inner wall heat-resistant cylinder 1;
and step three, a plurality of annular bosses 2 are arranged on the inner wall of the inner wall heat-resistant cylinder 1 in the circumferential direction, two ends of the same annular boss 2 in the length direction are not on the same horizontal straight line, and the plurality of annular bosses 2 are in a rotational flow shape.
In the embodiment, the rotary furnace is applied to a solid waste treatment system, the rotary furnace is a furnace body which is obliquely implanted between a tertiary air pipe and a cement kiln decomposing furnace and is specially used for cooperatively treating solid waste for the cement kiln, and the solid waste is conveyed by rotating the rotary furnace;
the invention is further configured to: the refractory brick has the characteristics of high temperature resistance and acid and alkali resistance.
In the embodiment, the refractory bricks are silicon mullite bricks; the firebricks are made of one material, and the firebricks with better acid and alkali resistance are selected, so that the service cycle of the firebricks is prolonged, and the masonry loss and the inventory cost of the firebricks can be reduced.
The invention is further configured to: the refractory bricks are selected from at least three different heights.
In this embodiment, the firebricks are made of four different heights, namely a first firebrick, a second firebrick, a third firebrick and a fourth firebrick, and the heights are: 220mm, 280mm, 330mm and 380 mm.
The invention is further configured to: the annular boss 2 is formed by building refractory bricks with different heights.
In the embodiment, the outer side walls of the first refractory brick, the second refractory brick, the third refractory brick and the fourth refractory brick form a flat cylindrical wall surface; the annular boss 2 is formed by a second refractory brick, a third refractory brick and a fourth refractory brick, the second refractory brick and the third refractory brick are respectively positioned on two sides of the fourth refractory brick in the circumferential direction, and the convex sides of the second refractory brick and the third refractory brick form a step structure between the fourth refractory brick and the first refractory brick; the circumferential bosses 2 are composed of a second refractory brick, a fourth refractory brick and a third refractory brick, and the first refractory brick is used for filling the seams between the circumferential bosses 2.
The invention is further configured to: the annular bosses 2 are built by staggered building.
In this embodiment, the staggered building means that the axial stitches formed on the circumferential boss 2 are not on one line, the axial stitches include a first stitch between the first refractory brick and the second refractory brick, a second stitch between the second refractory brick and the fourth refractory brick, a third stitch between the fourth refractory brick and the third refractory brick, and a fourth stitch between the third refractory brick and the first refractory brick, and the first stitch, the second stitch, the third stitch and the fourth stitch are divided into a plurality of small-segment stitches, and the small-segment stitches on the same stitch are located on different horizontal lines.
The invention is further configured to: the rotational flow direction of the rotational flow shape is opposite to the rotational direction of the rotary furnace.
In the embodiment, the swirling flow shape is similar to a stretched spring, the swirling flow direction is opposite to the rotation direction of the rotary furnace, and the arrangement of the step structure of the annular boss 2 is matched, so that the advancing speed of materials in the rotary furnace is favorably slowed down, the time of solid wastes in the rotary furnace is prolonged, and the burnout rate of the solid wastes is improved.
The invention is further configured to: the number of the circumferential bosses 2 in the inner wall heat-resistant cylinder 1 is specifically 6.
The third embodiment discloses a masonry method of rotary furnace refractory bricks, which comprises the following steps:
firstly, selecting refractory bricks made of the same material;
step two, the firebricks are combined and built on the inner wall of the rotary furnace to form an inner wall heat-resistant cylinder 1;
and step three, a plurality of annular bosses 2 are arranged on the inner wall of the inner wall heat-resistant cylinder 1 in the circumferential direction, two ends of the same annular boss 2 in the length direction are not on the same horizontal straight line, and the plurality of annular bosses 2 are in a rotational flow shape.
In the embodiment, the rotary furnace is applied to a solid waste treatment system, the rotary furnace is a furnace body which is obliquely implanted between a tertiary air pipe and a cement kiln decomposing furnace and is specially used for cooperatively treating solid waste for the cement kiln, and the solid waste is conveyed by rotating the rotary furnace;
the invention is further configured to: the refractory brick has the characteristics of high temperature resistance and acid and alkali resistance.
In the embodiment, the refractory brick is a silicon mullite red brick or a silicon mullite brick; the firebricks are made of one material, and the firebricks with better acid and alkali resistance are selected, so that the service cycle of the firebricks is prolonged, and the masonry loss and the inventory cost of the firebricks can be reduced.
The invention is further configured to: the refractory bricks are selected from at least three different heights.
In this embodiment, the firebricks are made of four different heights, namely a first firebrick, a second firebrick, a third firebrick and a fourth firebrick, and the heights are: 240mm, 300mm, 350mm and 400 mm.
The invention is further configured to: the annular boss 2 is formed by building refractory bricks with different heights.
In the embodiment, the outer side walls of the first refractory brick, the second refractory brick, the third refractory brick and the fourth refractory brick form a flat cylindrical wall surface; the annular boss 2 is formed by a second refractory brick, a third refractory brick and a fourth refractory brick, the second refractory brick and the third refractory brick are respectively positioned on two sides of the fourth refractory brick in the circumferential direction, and the convex sides of the second refractory brick and the third refractory brick form a step structure between the fourth refractory brick and the first refractory brick; the circumferential bosses 2 are composed of a second refractory brick, a fourth refractory brick and a third refractory brick, and the first refractory brick is used for filling the seams between the circumferential bosses 2.
The invention is further configured to: the annular bosses 2 are built by staggered building.
In this embodiment, the staggered building means that the axial stitches formed on the circumferential boss 2 are not on one line, the axial stitches include a first stitch between the first refractory brick and the second refractory brick, a second stitch between the second refractory brick and the fourth refractory brick, a third stitch between the fourth refractory brick and the third refractory brick, and a fourth stitch between the third refractory brick and the first refractory brick, and the first stitch, the second stitch, the third stitch and the fourth stitch are divided into a plurality of small-segment stitches, and the small-segment stitches on the same stitch are located on different horizontal lines.
The invention is further configured to: the rotational flow direction of the rotational flow shape is opposite to the rotational direction of the rotary furnace.
In the embodiment, the swirling flow shape is similar to a section of a stretched spring, the swirling flow direction is opposite to the rotation direction of the rotary furnace, and the arrangement of the step structure of the circumferential boss 2 is matched, so that the advancing speed of materials in the rotary furnace is favorably slowed down, the time of solid wastes in the rotary furnace is prolonged, and the burnout rate of the solid wastes is improved.
The invention is further configured to: the number of the circumferential bosses 2 in the inner wall heat-resistant cylinder 1 is specifically 8.
The fourth embodiment is different from the first embodiment in that: the inner wall heat-resistant cylinder 1 is composed of a plurality of circular rings, a plurality of circular bosses 2 are formed on the inner wall of each circular ring, and the circular rings of each next layer rotate the same angle relative to the circular rings of the previous layer in the same direction, so that the circular bosses 2 are in a rotational flow shape.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, or orientations or positional relationships that the products of the present invention are usually placed in when used, or orientations or positional relationships that are usually understood by those skilled in the art, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or the elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Claims (7)
1. A masonry method of rotary furnace refractory bricks is characterized by comprising the following steps:
firstly, selecting refractory bricks made of the same material;
step two, the firebricks are combined and built on the inner wall of the rotary furnace to form a heat-resistant cylinder (1) with the inner wall;
and thirdly, a plurality of annular bosses (2) are arranged on the inner wall of the inner wall heat-resistant cylinder (1) in the circumferential direction, two ends of the same annular boss (2) in the length direction are not on the same horizontal straight line, and the annular bosses (2) are in a rotational flow shape.
2. The masonry method of the rotary kiln refractory brick according to claim 1, characterized in that: the refractory brick has the characteristics of high temperature resistance and acid and alkali resistance.
3. The masonry method of the rotary kiln refractory brick according to claim 1, characterized in that: the firebricks are at least three different heights, and the heights of the firebricks are 200-400 mm.
4. The masonry method of the rotary kiln refractory brick according to claim 3, characterized in that: the circumferential bosses (2) are formed by building refractory bricks with different heights.
5. The masonry method of the rotary kiln refractory brick according to claim 3, characterized in that: the annular bosses (2) are built by staggered building.
6. The masonry method of the rotary kiln refractory brick according to claim 1, characterized in that: the rotational flow direction of the rotational flow shape is opposite to the rotational direction of the rotary furnace.
7. The masonry method of the rotary kiln refractory brick according to claim 1, characterized in that: the number of the circumferential bosses (2) in the inner wall heat-resistant cylinder (1) is specifically 4-8.
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| CN202111161233.6A CN113758271A (en) | 2021-09-30 | 2021-09-30 | Masonry method of rotary furnace refractory bricks |
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| CN202111161233.6A CN113758271A (en) | 2021-09-30 | 2021-09-30 | Masonry method of rotary furnace refractory bricks |
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2021
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