CN115751976A - Method for building refractory material structure of double-hearth kiln lining support - Google Patents
Method for building refractory material structure of double-hearth kiln lining support Download PDFInfo
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- CN115751976A CN115751976A CN202211284064.XA CN202211284064A CN115751976A CN 115751976 A CN115751976 A CN 115751976A CN 202211284064 A CN202211284064 A CN 202211284064A CN 115751976 A CN115751976 A CN 115751976A
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Abstract
The invention discloses a method for building a double-hearth kiln furnace lining support refractory material structure, which comprises building a double-hearth kiln furnace lining support refractory material structure; the masonry process comprises the following steps: in odd layers in the ring brick layer, one insulating brick close to the castable around the pillar is horizontally and longitudinally built, the side surface of the insulating brick is close to the steel shell for building, one refractory brick is horizontally and longitudinally built towards one side in the furnace by the insulating brick, and part of the refractory brick is longitudinally inserted into the position of the castable; the even layers in the ring brick layer and the upper and lower layers of the struts are horizontally and longitudinally built by insulating bricks on an outer C lining close to the inner C lining, and the side faces of the insulating bricks are close to the steel shell. The invention can solve the problems that the pillars and the refractory materials of the double-hearth kiln are easy to crack to generate straight seams and damage the furnace walls.
Description
Technical Field
The invention relates to the technical field of steel manufacturing and equipment thereof, in particular to a building method of a refractory material part structure near a pillar of a double-hearth kiln lining.
Background
The double-hearth kiln has the advantages of low energy consumption, excellent product quality and the like, as shown in figure 1, a general double-hearth kiln comprises two semicircular hearths which are opposite to each other and are in mirror image connection through a middle channel, a furnace lining of the furnace is called an outer C lining A, the middle channel forms an approximate ellipse, the furnace lining of the furnace is called an inner C lining B, a straight line at the inner end of the semicircle of the outer C lining is connected with the inner C lining, two outer C linings and the straight line part form an annular brick layer, and 8 vertically-arranged cooling pillars 6 are uniformly arranged at the connection part of the outer C lining and the inner C lining and in one circle of the inner C lining, and are generally called a double-C structure. The furnace lining structure of the double-hearth kiln is divided into a cooling zone, a calcining zone and a preheating zone from bottom to top, and is formed by building insulating bricks made of refractory materials with high temperature resistance, wear resistance and good heat preservation performance to form a multi-layer horizontal ring brick layer with a double-C structure (an inner C lining and an outer C lining). The brick layer on the outer ring of the kiln counts from the bottom of the kiln chamber in turn to obtain 194 layers in total.
Wherein the cooling zone and the bottom of the steel structure are leveled by adopting low cement casting material, and then the building of the cooling zone is started. The brick is built by sequentially adopting coating materials, two layers of fiber boards, insulating bricks horizontally, neatly, side by side and transversely arranged and high-strength refractory bricks (namely main working layer bricks) from 1 to 40 layers and from the steel shell structure to the outside. Wherein the thickness of the fiber board is 30mm, the thickness of the insulating brick is 230mm, and the thickness of the high-strength clay insulating brick is 260mm. When each layer is built, expansion gaps are reserved in the circular rings of the annular brick layers of the kiln at certain intervals.
From 41 layers to 82 layers, as the height of the kiln is gradually close to the calcining zone area, the working temperature is correspondingly increased, and the brick lining working layer brick is changed into a high-alumina refractory brick.
The middle channel is provided with a fire door for observing and cleaning the channel operation and dust deposition conditions in the kiln during the kiln shutdown, and a setting template needs to be built during the masonry.
The temperature of a combustion zone can reach 1100 ℃ at most, and in consideration of the calcining characteristic and the temperature, bricks of the 83 th to 161 th rings of the outer ring of the kiln are constructed by adopting mullite bricks. As shown in figure 2, the furnace lining is sequentially provided with coating materials, two layers of fiberboards 8, insulating bricks 7 and mullite bricks 2 which are horizontally, orderly, side by side and transversely arranged from the structure of the steel shell 1 to the outside.
As shown in fig. 2, anchoring parts and masonry castable 5 are welded beside a strut 6 on a steel plate 1 at the bottom of a steel structure inside a kiln, a cement layer 10 on the steel plate 1 and a strut structure, and are used for protecting the steel structure part. And meanwhile, thermocouples are uniformly arranged in the calcining inner and outer ring areas of each kiln chamber and are used for detecting the calcining condition of the kiln.
And the 162 th layer to the 194 th layer adopt high-strength refractory bricks as working layers and are used as a part of a preheating zone.
The whole kiln structure should be strictly symmetrical, and in order to ensure the construction period, the building of two kiln chambers can be carried out simultaneously. In the building process, the overlapping of the brick joints of the upper and lower adjacent brick layers is avoided as much as possible, namely, the two adjacent bricks in the upper and lower directions are stacked and built orderly, and meanwhile, the mortar is required to be smeared uniformly in a sufficient quantity.
Expansion joints are designed among the refractory bricks, the refractory materials near the pillars of the double-hearth kiln are in a straight joint 9 structure (shown in figures 2 and 3) formed by combining the castable and the refractory bricks, when the temperature of the kiln changes, the refractory bricks expand with heat and contract with cold, the horizontal direction can generate the enlargement of a straight joint 9 gap, so that hot air in the kiln directly enters the heat-insulating layer along the straight joint between the bricks and the castable of the pillars, and the heat-insulating layer is burnt and damaged; two adjacent bricks made of refractory materials in the up-down direction are stacked and built in order, so that straight seams 9 are formed at junctions from top to bottom and are easy to crack, high-temperature airflow scouring is formed on the bricks of the rear heat-insulating layer, and the whole furnace wall is damaged. The masonry structure must be modified to address this unreasonable masonry structure.
Disclosure of Invention
The invention aims to solve the problem of providing a method for building a double-hearth kiln lining support refractory material structure, so as to solve the problem that the double-hearth kiln support and the refractory material are easy to crack to generate straight seams and damage the furnace wall.
In order to solve the problems, the technical scheme of the invention is as follows: the method for building the refractory material structure of the double-hearth kiln furnace lining support comprises building a refractory material structure of the double-hearth kiln furnace lining support;
the refractory material structure of the double-hearth kiln lining strut comprises two semicircular outer C liners and an inner C liner, wherein the two semicircular outer C liners are connected with the middle channel and are opposite to each other, the inner C liner is formed by the middle channel, the semicircular inner end of each outer C liner is linearly connected with the inner C liner, the two outer C liners and the linear part form a brick layer, the brick layer is sequentially provided with coating materials and two fiber plates from a steel shell to the inside, heat-insulating bricks and mullite bricks are horizontally, orderly and transversely arranged side by side, struts are vertically arranged in the middle of the brick layer, pouring materials are arranged between the peripheries of the struts and the brick layer, a steel plate layer is arranged at the bottom of the brick layer, a cement layer is arranged on the steel plate layer,
in the odd layers of the ring brick layers, one insulating brick close to the castable around the strut is horizontally and longitudinally arranged, the side face of the insulating brick is close to the steel shell, one side of the insulating brick facing the furnace is horizontally and longitudinally provided with a refractory brick, and part of the refractory brick is longitudinally inserted into the position of the castable;
in the even layers of the ring brick layer and the upper and lower layers of the strut, the insulating brick on one outer C lining close to the inner C lining is horizontally and longitudinally arranged and the side surface of the insulating brick is close to the steel shell, one side of the insulating brick towards the furnace is horizontally and longitudinally provided with a refractory brick, the end surfaces of the insulating brick and the refractory brick are arranged in parallel and level, and part of the insulating brick and the end surface of the refractory brick are inserted into the joint of the inner C lining and the outer C lining;
the masonry process comprises the following steps: leveling a steel plate layer at the bottom of the pillar around the pillar by using a cement material, and building a cement layer on the steel plate layer to ensure the foundation level of the steel plate layer for building a refractory material;
one insulating brick close to the castable around the strut is horizontally and longitudinally laid in an odd layer of the ring brick layer, and the side face of the insulating brick is close to the steel shell for laying, one refractory brick is horizontally and longitudinally laid on one side of the insulating brick towards the furnace, and part of the refractory brick is longitudinally inserted into the position of the castable;
and the heat-insulating bricks on one outer C lining close to the inner C lining are horizontally and longitudinally built and the side faces of the heat-insulating bricks are close to the steel shell, one refractory brick is horizontally and longitudinally built on one side of the heat-insulating brick towards the furnace, the heat-insulating bricks and the end faces of the refractory bricks are flush with each other and are all partially inserted into the joint of the inner C lining and the outer C lining.
In the above technical solution, a more specific solution may be: and a reinforcing refractory brick is arranged at the bottom layer of the strut in the ring brick layer and close to the position of the mullite brick on the outer C lining of the inner C lining, part of the reinforcing refractory brick is inserted into the joint of the inner C lining and the outer C lining, and the reinforcing refractory brick is provided with a bayonet for clamping the inner side brick of the inner C lining.
Further: the masonry process further comprises: and building a first layer in the ring brick layer on the steel plate layer, horizontally and longitudinally building an insulating brick on an outer C lining close to the inner C lining, horizontally and longitudinally building a refractory brick on the side close to the steel shell, horizontally and longitudinally building the insulating brick towards one side in the furnace, horizontally and longitudinally building the end surfaces of the insulating brick and the refractory brick in parallel and partially inserting the end surfaces of the insulating brick and the refractory brick into the joint of the inner C lining and the outer C lining, building a reinforcing refractory brick at the position close to a mullite brick on the outer C lining of the inner C lining, partially inserting the reinforcing refractory brick into the joint of the inner C lining and the outer C lining, and arranging a bayonet for clamping the inner brick of the inner C lining.
And further: the masonry process further comprises: and when the ring brick layer building height reaches 1-1.5 m, building templates around the pillars, and pouring by using mullite castable.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
according to the masonry method of the refractory material structure of the double-hearth kiln furnace lining strut, the refractory bricks horizontally and longitudinally arranged are added through the insulating bricks horizontally and longitudinally arranged at the strut part of the odd-numbered layer, and the refractory bricks are partially inserted into the castable position of the strut, so that the straight joint in the horizontal direction is not generated between the castable of the strut and the outer C lining, the masonry of the odd-numbered layer is different from that of the even-numbered layer, the staggered masonry of the brick joints of the strut is realized, the labyrinth joint effect is formed from top to bottom, the straight joint in the vertical direction from top to bottom on the masonry is avoided, the hot air is prevented from entering the insulating layer in a series mode, the whole furnace lining is effectively protected, and the better sealing of the refractory material structure is realized.
Drawings
FIG. 1 is a top view of a prior art double hearth kiln lining;
FIG. 2 is a top view of a prior art method for constructing a refractory structure of a double-hearth kiln lining support;
FIG. 3 is a left side view of a prior art method of constructing a double hearth kiln lining refractory structure;
FIG. 4 is a top view of an odd number of layers of post sites in accordance with an embodiment of the present invention;
FIG. 5 is a top view of a bottom layer of a strut according to an embodiment of the present invention;
FIG. 6 is a top view of an even number of courses of bricks in a course of bricks in a loop;
fig. 7 is a left side view of a post portion according to an embodiment of the present invention.
Detailed Description
The embodiments of the invention will be further described in detail below with reference to the following drawings:
the method for building the double-hearth kiln furnace lining support refractory material structure builds the double-hearth kiln furnace lining support refractory material structure.
The refractory material structure of the double-hearth kiln lining support is shown in figures 4 to 7, and comprises two semicircular outer C liners A and an inner C liner B, wherein the two semicircular outer C liners A are connected through a middle channel and are in mirror image connection, the inner end of the semicircle of each outer C liner is in straight line connection with the inner C liner, the two outer C liners and the straight line part form an annular brick layer, the annular brick layer is sequentially provided with coating materials and two fiber plates 8 from a steel shell 1 to the inside, heat preservation bricks 7 and mullite bricks 2 are horizontally, orderly and transversely arranged side by side, a support 6 is vertically arranged in the middle of the annular brick layer, pouring materials 5 are arranged between the periphery of the support 6 and the annular brick layer, a steel plate layer is arranged at the bottom of the annular brick layer, and a cement layer is arranged on the steel plate layer.
In the odd-numbered layers of the ring brick layers, as shown in fig. 4, a heat-insulating brick 7 close to the castable 5 around the support is horizontally and longitudinally arranged and the side face of the heat-insulating brick is close to the steel shell 1, a refractory brick 3 is horizontally and longitudinally arranged on one side of the heat-insulating brick 7 facing the furnace, and part of the refractory brick 3 is longitudinally inserted into the position of the castable 5, so that a straight seam 9 in the horizontal direction between the heat-insulating brick and the castable in the odd-numbered layers disappears.
As shown in figure 6, the insulating brick 7 on one outer C lining close to the inner C lining is horizontally and longitudinally arranged and is close to the steel shell 1 at the side surface, the refractory brick 3 is horizontally and longitudinally arranged on one side of the insulating brick 7 facing the furnace, the end surfaces of the insulating brick 7 and the refractory brick 3 are arranged in parallel and partially inserted into the joint of the inner C lining and the outer C lining, and straight seams 9 in the horizontal direction between the insulating brick on the even layer and the upper and lower layers of the support and the castable disappear.
The odd-numbered layers and the even-numbered layers are different in masonry, staggered masonry of brick joints of the support columns is achieved, straight joints in the vertical direction disappear, a labyrinth joint effect is formed from top to bottom, and cracking is prevented.
One layer of the bottom of the support column in the ring brick layer is as shown in figure 5, an insulating brick 7 on an outer C lining close to an inner C lining is horizontally and longitudinally arranged, the side face of the insulating brick 7 is close to the steel shell 1, a refractory brick 3 is horizontally and longitudinally arranged on one side of the insulating brick 7 towards the furnace, the end faces of the insulating brick 7 and the refractory brick 3 are arranged in a flush mode, and are all partially inserted into the joint of the inner C lining and the outer C lining, a reinforcing refractory brick 12 is arranged at the position close to a mullite brick on the outer C lining of the inner C lining, the reinforcing refractory brick 12 is partially inserted into the joint of the inner C lining and the outer C lining and is provided with a bayonet for clamping the inner side brick of the inner C lining, the reinforcing refractory brick 12 is inserted into the mullite brick, the supporting strength is supplemented, and the reinforcing refractory brick 12 is partially inserted into the joint of the inner C lining and the outer C lining and the bayonet, so that a straight seam in the horizontal direction is eliminated.
The masonry process comprises the following steps:
A. and leveling the steel plate layer at the bottom of the pillar around the pillar by using a cement material, and building a cement layer 10 on the steel plate layer 11 to ensure the foundation level of the steel plate layer for building a refractory material.
B. The first layer in the ring brick layer is built on the steel plate layer 11, the insulating brick 7 on the outer C lining close to the inner C lining is horizontally and longitudinally built, the side face of the insulating brick 7 is close to the steel shell 1, the insulating brick 7 horizontally and longitudinally builds a refractory brick 3 towards one side in the furnace, the end faces of the insulating brick 7 and the refractory brick 3 are flush and built, part of the insulating brick 7 and part of the end faces of the refractory brick 3 are inserted into the joint of the inner C lining and the outer C lining, a reinforcing refractory brick 12 is built at the position close to the mullite brick on the outer C lining of the inner C lining, and part of the reinforcing refractory brick 12 is inserted into the joint of the inner C lining and the outer C lining and is provided with a bayonet for clamping the inner side brick of the inner C lining.
C. Odd layers (2n +1 layers) in the ring brick layers are horizontally and longitudinally built by one insulating brick 7 close to the pouring material 5 around the support and are horizontally and longitudinally built by the side close to the steel shell 1, one refractory brick 3 is horizontally and longitudinally built by the insulating brick 7 towards one side in the furnace, and part of the refractory brick 3 is longitudinally inserted into the position of the pouring material;
the even number layers (2 n layers) in the ring brick layers and the upper and lower layers of the struts are horizontally and longitudinally built by an insulating brick 7 on an outer C lining close to the inner C lining, the side surface of the insulating brick 7 is close to the steel shell 1, a refractory brick 3 is horizontally and longitudinally built by the insulating brick 7 towards one side in the furnace, and the end surfaces of the insulating brick 7 and the refractory brick 3 are flush and level to be built and are partially inserted into the joint of the inner C lining and the outer C lining.
D. When the ring brick layer building height reaches 1-1.5 m, a template is built around the pillar 6, mullite castable is used for pouring, after the castable is hardened, the template is removed, and a fiber board made of refractory materials with the thickness of about 5-8 mm is placed on the upper part of the castable; and C, repeating the step C until the masonry is finished.
According to the masonry method of the refractory material structure of the double-hearth kiln lining strut, the refractory bricks 3 which are horizontally and longitudinally arranged are added through the horizontal and longitudinal arrangement of the insulating bricks at the strut 6 position of the odd-numbered layer, and the refractory bricks 3 are partially inserted into the position of the castable 5 of the strut, so that the straight joint in the horizontal direction is not generated between the castable of the strut and the outer C lining, the masonry of the odd-numbered layer and the masonry of the even-numbered layer are different, the staggered masonry of the brick joints of the strut is realized, the labyrinth joint effect is formed from top to bottom, the straight joint in the vertical direction from top to bottom on the masonry is avoided, the hot air is prevented from entering the insulating layer in a series manner, the whole lining is effectively protected, and the better sealing of the refractory material structure is realized.
Claims (4)
1. A method for building a refractory material structure of a double-hearth kiln furnace lining support comprises building a refractory material structure of the double-hearth kiln furnace lining support;
the double-hearth kiln furnace lining support refractory material structure comprises two semicircular outer C liners connected with a middle channel and an inner C liner formed by the middle channel, wherein the two semicircular inner ends of the outer C liners are linearly connected with the inner C liner, the two outer C liners and the linear part form a ring brick layer, the ring brick layer is sequentially provided with coating materials and two fiber boards from a steel shell to the inside, heat-insulating bricks and mullite bricks are horizontally, orderly and transversely arranged side by side, a support is vertically arranged in the middle of the ring brick layer, pouring materials are arranged between the periphery of the support and the ring brick layer, a steel plate layer is arranged at the bottom of the ring brick layer, a cement layer is arranged on the steel plate layer,
the method is characterized in that: in the odd layers in the ring brick layers, one insulating brick close to the castable around the strut is horizontally and longitudinally arranged, the side face of the insulating brick is close to the steel shell, one side of the insulating brick facing the furnace is horizontally and longitudinally provided with a refractory brick, and part of the refractory brick is longitudinally inserted into the position of the castable;
in the even layers of the ring brick layer and the upper and lower layers of the strut, the insulating brick on one outer C lining close to the inner C lining is horizontally and longitudinally arranged and the side surface of the insulating brick is close to the steel shell, one side of the insulating brick towards the furnace is horizontally and longitudinally provided with a refractory brick, the end surfaces of the insulating brick and the refractory brick are arranged in parallel and level, and part of the insulating brick and the end surface of the refractory brick are inserted into the joint of the inner C lining and the outer C lining;
the masonry process comprises the following steps: leveling a steel plate layer at the bottom of the pillar around the pillar by using a cement material, and building a cement layer on the steel plate layer to ensure that the foundation of the steel plate layer for building a refractory material is horizontal;
in odd layers in the brick surrounding layer, one insulating brick close to the castable around the strut is horizontally and longitudinally built, the side face of the insulating brick is close to the steel shell for building, one refractory brick is horizontally and longitudinally built towards one side in the furnace by the insulating brick, and part of the refractory brick is longitudinally inserted into the position of the castable;
and the heat-insulating bricks on one outer C lining close to the inner C lining are horizontally and longitudinally built and the side faces of the heat-insulating bricks are close to the steel shell, one refractory brick is horizontally and longitudinally built on one side of the heat-insulating brick towards the furnace, the heat-insulating bricks and the end faces of the refractory bricks are flush with each other and are all partially inserted into the joint of the inner C lining and the outer C lining.
2. The method for building the refractory material structure of the lining support of the double-hearth kiln according to claim 1, characterized by comprising the following steps: and a reinforcing refractory brick is arranged at the bottom layer of the strut in the ring brick layer and close to the position of the mullite brick on the outer C lining of the inner C lining, part of the reinforcing refractory brick is inserted into the joint of the inner C lining and the outer C lining, and the reinforcing refractory brick is provided with a bayonet for clamping the inner side brick of the inner C lining.
3. The method for building the refractory material structure of the lining support of the double-hearth kiln according to claim 2, wherein the building process further comprises the following steps: the first layer of the annular brick layer is built on the steel plate layer, the insulating brick on the outer C lining close to the inner C lining is horizontally and longitudinally built, the side face of the insulating brick is close to the steel shell for building, a refractory brick is horizontally and longitudinally built on one side of the insulating brick towards the furnace, the end faces of the insulating brick and the refractory brick are leveled for building, part of the insulating brick is inserted into the joint of the inner C lining and the outer C lining, a reinforcing refractory brick is built at the position close to the mullite brick on the outer C lining of the inner C lining, and part of the reinforcing refractory brick is inserted into the joint of the inner C lining and the outer C lining and is provided with a bayonet for clamping the inner side brick of the inner C lining.
4. The method for building the refractory structure of the lining support of the double-hearth kiln according to claim 3, wherein the building process further comprises: and when the ring brick layer building height reaches 1-1.5 m, building templates around the pillars, and pouring by using mullite castable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211284064.XA CN115751976A (en) | 2022-10-20 | 2022-10-20 | Method for building refractory material structure of double-hearth kiln lining support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211284064.XA CN115751976A (en) | 2022-10-20 | 2022-10-20 | Method for building refractory material structure of double-hearth kiln lining support |
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| CN115751976A true CN115751976A (en) | 2023-03-07 |
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| CN202211284064.XA Pending CN115751976A (en) | 2022-10-20 | 2022-10-20 | Method for building refractory material structure of double-hearth kiln lining support |
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- 2022-10-20 CN CN202211284064.XA patent/CN115751976A/en active Pending
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