Sealing and isolating structure of double-chamber kiln

Abstract

The utility model discloses a sealing and isolating structure of a double-hearth kiln, which relates to the field of steel manufacturing equipment and is characterized in that a heat insulation plate, insulating bricks and refractory bricks are sequentially built from a steel structure to the center of a kiln hearth; fiberboards are built between the insulating bricks and the refractory bricks; the refractory bricks, the fiberboards and the heat insulation plates which are built are flush in height from bottom to top at intervals, the heat insulation bricks which are built are lower than the refractory bricks, the fiberboards and the heat insulation plates, a groove is formed, heavy castable is cast in the groove to form a pouring layer, and the pouring layer is made of a heat insulation material. One side of the casting layer is connected with the heat insulation plate, and the other side of the casting layer is connected with the fiber plate; compared with the prior art, the pouring layer is used for covering the heat preservation layer, heat preservation bricks of the heat preservation layer are effectively isolated, and high-temperature smoke is prevented from entering the heat preservation layer and burning loss of the heat preservation layer in a large area is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of steel manufacturing equipment, in particular to a double-chamber kiln sealing isolation structure. Background Art

[0002] The double-chamber kiln has the advantages of low energy consumption and excellent product quality, and its structure is a "double C structure". The inner lining structure of the double-chamber kiln is divided into a cooling zone, a calcining zone, and a preheating zone from bottom to top. It is built with refractory materials with good high temperature resistance, wear resistance, and thermal insulation performance. The two kiln chambers are built with an intermediate channel and 8 cooling pillars. The outer ring brick layer of the kiln is counted from the bottom of the kiln chamber, with a total of 194 layers.

[0003] The cooling belt and the bottom of the steel structure are leveled with low-cement castables, and then the cooling belt is laid. From the 1st to the 40th floor, from the steel shell structure outward, coating materials, two layers of fiberboard, insulation bricks, and high-strength clay bricks are used in sequence. The fiberboard is 30mm thick, the insulation brick is 230mm thick, and the high-strength clay insulation brick is 260mm thick. When laying each layer, expansion joints are reserved in the circular ring of the kiln brick layer at a certain distance.

[0004] From the 41st floor to the 82nd floor, as the kiln height gradually approaches the calcining zone, the working temperature increases accordingly, and the bricks of the brick lining working layer are changed to high-alumina refractory bricks.

[0005] In the combustion zone, the temperature can reach up to 1100℃. Considering the calcination characteristics and temperature, the working layer bricks of the 83rd to 161st brick layer structure of the outer ring of the kiln are made of mullite bricks. From the steel shell structure to the outside, coating material, two layers of fiberboard, insulation bricks, and mullite bricks are used in turn.

[0006] The 162nd to 194th floors use high-strength clay bricks as the working layer, as part of the preheating zone.

[0007] In the combustion zone, expansion joints are designed between refractory bricks. When the temperature of the kiln changes, the refractory bricks will expand and contract, causing the straight seams to become larger, causing the hot air from the kiln to flow along the straight seams between the bricks and directly enter the insulation layer, burning the insulation layer. Because the refractory bricks in the insulation layer are connected in series, once the hot air from the kiln flows into the insulation layer, a large area of ​​the insulation layer will be burned. Summary of the invention

[0008] The utility model provides a double-chamber kiln sealing isolation structure, which can solve the problem that the existing insulation bricks are burned in a large area when the hot air from the kiln enters the insulation layer.

[0009] In order to solve the above problems, the technical solution of the utility model is: from the steel structure to the center of the kiln chamber, insulation boards, thermal insulation bricks and refractory bricks are sequentially laid, and fiberboards are laid between the insulation bricks and the refractory bricks; from bottom to top, at intervals, the heights of the laid refractory bricks, the fiberboards and the insulation boards are flush, and the heights of the laid insulation bricks are lower than those of the refractory bricks, the fiberboards and the insulation boards, forming a groove, and heavy castables are cast in the groove to form a casting layer, one side of the casting layer is connected to the insulation board, and the other side is connected to the fiberboard.

[0010] In the above technical solution, a more specific solution may be: the fiberboard is made of fiber cotton and has a thickness of 10 mm.

[0011] Further: the insulation board is divided into insulation board one and insulation board two, the insulation board two is connected to one side of the casting layer, the upper end face and the lower end face of the insulation board two are respectively built with the insulation board one, and the thickness of the insulation board two is less than the thickness of the insulation board one.

[0012] Furthermore: the insulation bricks are arranged in two rows, the groove height of the groove is 200mm-300mm, and the height of the casting layer is 200mm-300mm.

[0013] Further: a layer of heavy castable is built on the top of the kiln, covered with refractory bricks, fiberboard, insulation bricks, and insulation boards to form a top casting layer, and the height of the top casting layer is 200mm-300mm.

[0014] Furthermore: the distance is 2-3 meters high.

[0015] Furthermore: the thickness of the second insulation board is 8mm-10mm, and the thickness of the first insulation board is 10mm-20mm.

[0016] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0017] 1. From bottom to top, a groove is formed between the insulation brick, the insulation board and the fiberboard at intervals. Heavy castables are poured into the groove to form a casting layer. The casting layer covers the insulation layer, effectively isolating the insulation bricks of the insulation layer and preventing high-temperature smoke from entering the insulation layer and causing large-scale burning of the insulation layer.

[0018] 2. A layer of heavy castable with a height of 200-300mm is built on the top of the insulation bricks on the top layer of the kiln to avoid excessive suction force of the induced draft fan and the loss of insulation bricks along with the smoke suction force due to wear and tear due to long service life.

[0019] 3. The fiberboard between the heavy castable and the steel structure effectively avoids the expansion of refractory bricks and damage to the steel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an axial cross-sectional view of the structure of the utility model.

[0021] Figure 2 yes Figure 1 AA section view.

[0022] Serial number description:

[0023] Insulation board one 1, insulation brick 2, fiberboard 3, refractory brick 4, steel structure 5, casting layer 6, insulation board two 7. DETAILED DESCRIPTION

[0024] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0025] like Figure 1 The double-chamber kiln sealing isolation structure shown in the figure is constructed from the steel structure 5 to the center of the kiln chamber, with insulation board 1, insulation brick 2, fiberboard 3 and refractory brick 4 built in sequence; the fiberboard is made of fiber cotton and has a thickness of 10 mm; from bottom to top, every 2-3 meters, insulation board 2 7 is built on the top surface of insulation board 1 on one side of the steel structure, and the thickness of insulation board 2 7 is less than that of insulation board 1, and its thickness is 8 mm -10mm, the thickness of the insulation board one is 10mm-20mm, the top surface of the laid refractory bricks 4, fiberboard 3 and insulation board two 7 is flush, the top surface of the insulation brick 2 is lower than the top surface of the laid refractory bricks 4, fiberboard 3 and insulation board two 7, forming a groove, and pouring heavy casting material into the groove to form a casting layer 6, one side of the casting layer is connected to the fiberboard 3, and the other side is connected to the insulation board two 7, the groove height is 200mm-300mm, the height of the casting layer is 200mm-300mm, and the insulation The warm bricks 2 and the insulation board 1 are cast and covered, leveled, and after hardening, the insulation board 1, the insulation bricks 2, the limit plate 3 and the refractory bricks 4 are laid upwards. After the masonry reaches a height of 2-3 meters to form a groove, the heavy castables are continued to be cast. This process is repeated. Finally, a layer of heavy castables is laid on the top of the kiln to form a top casting layer. The height of the top casting layer is 200mm-300mm. The heavy castables cover the refractory bricks 4, the fiberboard 3, the insulation bricks 2 and the insulation board 1 to avoid excessive draft fan suction, which may lead to the loss of the insulation bricks 2.

Claims

1. A double-chamber kiln sealing and isolation structure, from the steel structure to the center of the kiln chamber, insulation boards, insulation bricks and refractory bricks are built in sequence, characterized by: Fiberboard is built between the insulation bricks and the refractory bricks; from bottom to top, at intervals, the heights of the built refractory bricks, the fiberboard and the insulation board are flush, and the height of the built insulation bricks is lower than that of the refractory bricks, the fiberboard and the insulation board, forming a groove, in which heavy castables are cast to form a casting layer, one side of the casting layer is connected to the insulation board, and the other side is connected to the fiberboard.

2. The double-chamber kiln sealing and isolation structure according to claim 1 is characterized in that: The fiberboard is made of fiber cotton and has a thickness of 10 mm.

3. The double-chamber kiln sealing and isolation structure according to claim 1 or 2, characterized in that: The insulation board is divided into insulation board 1 and insulation board 2. The insulation board 2 is connected to one side of the casting layer. The upper end face and the lower end face of the insulation board 2 are respectively built with the insulation board 1. The thickness of the insulation board 2 is less than that of the insulation board 1.

4. The double-chamber kiln sealing and isolation structure according to claim 3 is characterized in that: The insulation bricks are arranged in two rows, the groove height of the groove is 200mm-300mm, and the height of the casting layer is 200mm-300mm.

5. The double-chamber kiln sealing and isolation structure according to claim 4 is characterized in that: A layer of heavy castable is built on the top of the kiln, covered with refractory bricks, fiberboard, insulation bricks and insulation boards to form a top casting layer, the height of which is 200mm-300mm.

6. The double-chamber kiln sealing and isolation structure according to claim 1 is characterized in that: The distance is 2-3 meters high.

7. The double-chamber kiln sealing and isolation structure according to claim 3 is characterized in that: The thickness of the second insulation board is 8mm-10mm, and the thickness of the first insulation board is 10mm-20mm.

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