CN110849147A - Heat accumulating type steel pushing heating furnace bottom structure - Google Patents
Heat accumulating type steel pushing heating furnace bottom structure Download PDFInfo
- Publication number
- CN110849147A CN110849147A CN201911187299.5A CN201911187299A CN110849147A CN 110849147 A CN110849147 A CN 110849147A CN 201911187299 A CN201911187299 A CN 201911187299A CN 110849147 A CN110849147 A CN 110849147A
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- Prior art keywords
- heat
- heating furnace
- insulation layer
- resistant
- steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 238000010438 heat treatment Methods 0.000 title claims abstract description 43
- 238000009413 insulation Methods 0.000 claims abstract description 72
- 230000009970 fire resistant effect Effects 0.000 claims abstract description 17
- 238000004321 preservation Methods 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 8
- 239000004567 concrete Substances 0.000 claims description 23
- 239000002893 slag Substances 0.000 claims description 18
- 239000011150 reinforced concrete Substances 0.000 claims description 12
- 230000001172 regenerating effect Effects 0.000 claims description 11
- 239000011449 brick Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 claims 2
- 239000000463 material Substances 0.000 claims 1
- 238000013021 overheating Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
Images
Classifications
-
- 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
- F27B17/00—Furnaces of a kind not covered by any preceding group
-
- 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
- F27D1/0043—Floors, hearths
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention provides a furnace bottom structure of a heat accumulating type steel pushing heating furnace, which sequentially comprises a fireproof heat preservation layer, a heat insulation structure and a supporting structure from top to bottom, wherein the heat insulation structure is of a solid structure, the upper surface of the heat insulation structure is connected with the lower surface of the fireproof heat preservation layer, and the lower surface of the heat insulation structure is connected with the upper surface of the supporting structure. The furnace bottom structure of the heat accumulating type steel pushing heating furnace provided by the invention cancels the furnace bottom steel plate in the furnace bottom structure in the prior art, and directly and fundamentally avoids the condition that the furnace body steel structure is damaged due to the deformation of the furnace bottom steel plate when the fire-resistant heat-insulating layer is burnt through; meanwhile, the heat insulation structure with the solid structure is arranged between the fire-resistant heat insulation layer and the supporting structure, so that when the fire-resistant heat insulation layer is burnt through, the supporting structure can be effectively protected by the heat insulation structure, and the situation that the supporting structure is damaged by overheating is effectively avoided.
Description
Technical Field
The invention relates to the technical field of metallurgical heating equipment, in particular to a furnace bottom structure of a heat accumulating type steel pushing heating furnace.
Background
The push type heating furnace is a common structure in the metallurgical industry project, when in use, a steel billet is pushed into the heating furnace by a push steel machine, and the steel billet slides on a slide rail supported by a water cooling pipe, so that the upper surface and the lower surface of the billet can be heated.
The hearth structure of the present heating furnace is composed of a refractory brick heat insulation layer 100, a hearth steel plate 200, an air heat insulation layer 300 formed by a hearth overhead steel beam 310, and a heat-resistant reinforced concrete support structure 400 from top to bottom, as shown in fig. 1. Although the furnace bottom structure is convenient to install, in actual production, when the refractory brick insulating layer 100 in the furnace bottom structure is burnt through, the refractory brick insulating layer 100 is hard to be found, once the refractory brick insulating layer 100 is burnt through, the furnace bottom steel plate 200 can be rapidly deformed due to the rapidly raised temperature, and the safety of the furnace body steel structure is damaged; in a more serious case, the strength of the reinforcing bars in the heat-resistant reinforced concrete support structure 400 is also sharply reduced due to the temperature increase, and the temperature stress of the concrete is sharply increased, thereby causing the destruction of the hearth structure. Once the heat-resistant reinforced concrete supporting structure 400 of the heating furnace bottom structure is damaged, the repairing difficulty is large, the investment is high, the safety degree is low, and generally, the problem can be solved only by adopting a remote reconstruction mode.
Disclosure of Invention
The invention aims to provide a furnace bottom structure of a heat accumulating type push steel heating furnace, which can effectively eliminate the damage to a furnace body steel structure and a heat-resistant reinforced concrete supporting structure caused by the burning-through of a refractory brick insulating layer in the conventional furnace bottom structure.
In order to achieve the purpose, the invention provides a furnace bottom structure of a heat accumulating type steel pushing heating furnace, wherein the furnace bottom structure of the heat accumulating type steel pushing heating furnace sequentially comprises a fireproof heat preservation layer, a heat insulation structure and a supporting structure from top to bottom, the heat insulation structure is a solid structure, the upper surface of the heat insulation structure is connected with the lower surface of the fireproof heat preservation layer, and the lower surface of the heat insulation structure is connected with the upper surface of the supporting structure.
The heat accumulating type push steel heating furnace bottom structure comprises a first heat insulation layer and a second heat insulation layer from top to bottom.
The furnace bottom structure of the heat accumulating type push steel heating furnace is characterized in that the first heat insulation layer is a heat-resistant concrete heat insulation layer.
The furnace bottom structure of the heat accumulating type push steel heating furnace is characterized in that the heat-resistant concrete heat-insulating layer is a heat-resistant concrete heat-insulating layer with the strength grade of more than or equal to C30.
The furnace bottom structure of the heat accumulating type steel pushing heating furnace is characterized in that the heat-resistant concrete heat-insulating layer is made of plain concrete or reinforced concrete.
The furnace bottom structure of the heat accumulating type push steel heating furnace is characterized in that the heat-resistant concrete heat-insulating layer is a heat-resistant concrete heat-insulating layer with the heat-resistant temperature of 1200 ℃.
The furnace bottom structure of the heat accumulating type push steel heating furnace is characterized in that the second heat insulation layer is a blast furnace water slag heat insulation layer.
The furnace bottom structure of the heat accumulating type push steel heating furnace is characterized in that the blast furnace water slag heat insulation layer has a density less than or equal to 500kg/m3The blast furnace granulated slag thermal insulation layer is made of the blast furnace granulated slag.
The furnace bottom structure of the heat accumulating type push steel heating furnace is characterized in that the blast furnace granulated slag heat insulation layer is a blast furnace granulated slag heat insulation layer with the heat resistance temperature of 900 ℃.
The furnace bottom structure of the heat accumulating type push steel heating furnace is characterized in that the heat accumulating type push steel heating furnace is a furnace bottom structure, the heat accumulating type.
Compared with the prior art, the invention has the following advantages:
the furnace bottom structure of the heat accumulating type steel pushing heating furnace provided by the invention cancels the furnace bottom steel plate in the furnace bottom structure in the prior art, and directly and fundamentally avoids the condition that the furnace body steel structure is damaged due to the deformation of the furnace bottom steel plate when the fire-resistant heat-insulating layer is burnt through; meanwhile, the heat insulation structure with the solid structure is arranged between the fire-resistant heat insulation layer and the supporting structure, so that when the fire-resistant heat insulation layer is burnt through, the supporting structure can be effectively protected by the heat insulation structure, and the situation that the supporting structure is damaged by overheating is effectively avoided.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1 is a schematic view of a prior art hearth structure;
FIG. 2 is a schematic structural view of the furnace bottom structure of the regenerative push steel heating furnace provided by the invention.
The reference numbers illustrate:
the prior art is as follows:
100. a refractory brick heat-insulating layer;
200. a furnace bottom steel plate;
300. the formed air heat insulation layer;
310. a furnace bottom overhead steel beam;
400. a heat resistant reinforced concrete support structure;
the invention comprises the following steps:
1. a fire-resistant insulating layer;
2. a thermally insulating structure;
21. a first insulating layer;
22. a second thermal insulation layer;
3. a support structure.
Detailed Description
In order to clearly understand the technical solution, the purpose and the effect of the present invention, a detailed description of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 2, the invention provides a furnace bottom structure of a heat accumulating type steel pushing heating furnace, wherein the furnace bottom structure of the heat accumulating type steel pushing heating furnace sequentially comprises a fireproof heat preservation layer 1, a heat insulation structure 2 and a supporting structure 3 from top to bottom, the heat insulation structure 2 is a solid structure, the upper surface of the heat insulation structure 2 is connected with the lower surface of the fireproof heat preservation layer 1, and the lower surface of the heat insulation structure 2 is connected with the upper surface of the supporting structure 3. The furnace bottom structure of the heat accumulating type steel pushing heating furnace provided by the invention cancels the furnace bottom steel plate in the furnace bottom structure in the prior art, and directly and fundamentally avoids the condition that the furnace body steel structure is damaged due to the deformation of the furnace bottom steel plate when the fireproof heat-insulating layer 1 is burnt through; meanwhile, the heat insulation structure 2 with the solid structure is arranged between the fire-resistant heat insulation layer 1 and the support structure 3, so that when the fire-resistant heat insulation layer 1 is burnt through, the support structure 3 can be effectively protected by the heat insulation structure 2, and the support structure 3 is effectively prevented from being damaged by overheating.
Further, as shown in fig. 2, the heat accumulating type push steel heating furnace bottom structure provided by the present invention, wherein the heat insulating structure 2 comprises a first heat insulating layer 21 and a second heat insulating layer 22 from top to bottom, and the first heat insulating layer 21 and the second heat insulating layer 22 can be made of different heat insulating materials, so as to ensure the heat insulating effect of the heat insulating structure 2; and the thermal insulation coefficients of the first thermal insulation layer 21 and the second thermal insulation layer 22 can be set to be different, preferably, the thermal insulation coefficient of the first thermal insulation layer 21 can be set to be higher than that of the second thermal insulation layer 22 because the ambient temperature at the position of the first thermal insulation layer 21 is higher than that of the second thermal insulation layer 22 due to the direct contact of the first thermal insulation layer 21 with the fire-resistant insulation layer 1, and therefore the thermal insulation capability of the first thermal insulation layer 21 should be better than that of the second thermal insulation layer 22.
Preferably, the first heat insulation layer 21 is a heat-resistant concrete heat insulation layer. The heat-resistant concrete heat-insulating layer is a heat-resistant concrete heat-insulating layer which has the strength grade of more than or equal to C30, is made of plain concrete or reinforced concrete and has the heat-resistant temperature of 1200 ℃. The intensity of heat-resisting concrete insulating layer is high, can bear the weight of its upper portion fire-resistant heat preservation 1, and heat-resisting temperature is high, can effectively completely cut off heat energy after the fire-resistant heat preservation 1 of upper portion above that is burnt out, carries out thermal-insulated protection to bearing structure 3. The heat-resistant concrete heat-insulating layer is generally made of plain concrete, and if the heating furnace is large in size, a small amount of reinforcing steel bars can be arranged to prevent shrinkage cracks during concrete construction.
Preferably, the second heat insulation layer 22 is a blast furnace slag heat insulation layer. The blast furnace granulated slag heat insulation layer is made of blast furnace granulated slag with the density of less than or equal to 500kg/m3 and has the heat-resistant temperature of 900 ℃. The blast furnace granulated slag is solid waste in the metallurgical industry, and the blast furnace granulated slag thermal insulation layer effectively utilizes the blast furnace granulated slag, so that the green production in the metallurgical industry is promoted.
Preferably, in the hearth structure of the regenerative push steel heating furnace according to the present invention, the refractory insulating layer 1 is a refractory insulating layer 1 formed of refractory bricks to ensure strength and heat resistance thereof, and the support structure 3 is a heat-resistant reinforced concrete support structure 3 made of reinforced concrete to ensure structural strength thereof.
Compared with the prior art, the invention has the following advantages:
the furnace bottom structure of the heat accumulating type steel pushing heating furnace provided by the invention cancels the furnace bottom steel plate in the furnace bottom structure in the prior art, and directly and fundamentally avoids the condition that the furnace body steel structure is damaged due to the deformation of the furnace bottom steel plate when the fire-resistant heat-insulating layer is burnt through; meanwhile, the heat insulation structure with the solid structure is arranged between the fire-resistant heat insulation layer and the supporting structure, so that when the fire-resistant heat insulation layer is burnt through, the supporting structure can be effectively protected by the heat insulation structure, and the situation that the supporting structure is damaged by overheating is effectively avoided.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (10)
1. The utility model provides a heat accumulation formula pushes away furnace bottom structure of steel heating furnace, its characterized in that, heat accumulation formula pushes away furnace bottom structure of steel heating furnace includes fire-resistant heat preservation, thermal-insulated structure and bearing structure from top to bottom in order, thermal-insulated structure is solid construction, thermal-insulated structure's upper surface with the lower surface of fire-resistant heat preservation meets, thermal-insulated structure's lower surface with bearing structure's upper surface meets.
2. The bottom structure of a regenerative steel-pushing heating furnace according to claim 1, wherein the heat insulation structure comprises a first heat insulation layer and a second heat insulation layer from top to bottom.
3. The bottom structure of a regenerative steel-pushing heating furnace according to claim 2, wherein said first thermal insulation layer is a heat-resistant concrete thermal insulation layer.
4. The bottom structure of a regenerative steel-pushing heating furnace according to claim 3, wherein said heat-resistant concrete heat-insulating layer is a heat-resistant concrete heat-insulating layer having a strength grade of C30 or higher.
5. The hearth structure of a regenerative steel-pushing heating furnace according to claim 3 or 4, wherein said heat-resistant concrete heat-insulating layer is made of plain concrete or reinforced concrete.
6. The hearth structure of a regenerative steel-pushing heating furnace according to claim 3 or 4, wherein said heat-resistant concrete heat-insulating layer is a heat-resistant concrete heat-insulating layer having a heat-resistant temperature of 1200 ℃.
7. The bottom structure of a regenerative steel-pushing heating furnace according to claim 2, wherein the second thermal insulation layer is a blast furnace slag thermal insulation layer.
8. The bottom structure of a regenerative steel-pushing heating furnace according to claim 7, wherein said thermal insulation layer of the blast furnace slag is made of a material having a density of 500kg/m or less3The blast furnace granulated slag thermal insulation layer is made of the blast furnace granulated slag.
9. The bottom structure of a regenerative steel-pushing heating furnace according to claim 8, wherein the thermal insulation layer of the blast furnace slag is a thermal insulation layer of the blast furnace slag having a heat resistance temperature of 900 ℃.
10. The hearth structure of a regenerative push steel heating furnace according to claim 1, wherein said refractory insulating layer is a refractory insulating layer constructed of refractory bricks, and said support structure is a heat-resistant reinforced concrete support structure made of reinforced concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911187299.5A CN110849147A (en) | 2019-11-28 | 2019-11-28 | Heat accumulating type steel pushing heating furnace bottom structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911187299.5A CN110849147A (en) | 2019-11-28 | 2019-11-28 | Heat accumulating type steel pushing heating furnace bottom structure |
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| Publication Number | Publication Date |
|---|---|
| CN110849147A true CN110849147A (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911187299.5A Pending CN110849147A (en) | 2019-11-28 | 2019-11-28 | Heat accumulating type steel pushing heating furnace bottom structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111940508A (en) * | 2020-07-06 | 2020-11-17 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Titanium blank heating process of steel pushing heat accumulating type heating furnace |
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|---|---|---|---|---|
| JP2004323865A (en) * | 2003-04-21 | 2004-11-18 | Nippon Steel Corp | Integral type pouring hearth trough for blast furnace |
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| CN202482333U (en) * | 2011-12-22 | 2012-10-10 | 北大方正集团有限公司 | Blast furnace |
| CN203159659U (en) * | 2013-03-11 | 2013-08-28 | 河北钢铁股份有限公司唐山分公司 | Converter bottom structure with less possibility of steel penetration accident |
| CN203550585U (en) * | 2013-10-16 | 2014-04-16 | 武汉钢铁(集团)公司 | Furnace bottom refractory material structure for liquid deslagging step-type heating furnace |
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| CN207845722U (en) * | 2018-02-09 | 2018-09-11 | 江阴市蓝天工业炉窑制造有限公司 | Push away steel continuous furnace bottom construction |
| CN209341824U (en) * | 2018-11-22 | 2019-09-03 | 沁阳市碳素有限公司 | A kind of bottom construction of can-type calcine furnace |
| CN211373215U (en) * | 2019-11-28 | 2020-08-28 | 中冶京诚工程技术有限公司 | Heat accumulating type steel pushing heating furnace bottom structure |
-
2019
- 2019-11-28 CN CN201911187299.5A patent/CN110849147A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004323865A (en) * | 2003-04-21 | 2004-11-18 | Nippon Steel Corp | Integral type pouring hearth trough for blast furnace |
| CN202482333U (en) * | 2011-12-22 | 2012-10-10 | 北大方正集团有限公司 | Blast furnace |
| CN102706159A (en) * | 2012-01-10 | 2012-10-03 | 河南安瑞高温材料股份有限公司 | Hearth refractory material structure of carbon roasting furnace |
| CN203159659U (en) * | 2013-03-11 | 2013-08-28 | 河北钢铁股份有限公司唐山分公司 | Converter bottom structure with less possibility of steel penetration accident |
| CN203550585U (en) * | 2013-10-16 | 2014-04-16 | 武汉钢铁(集团)公司 | Furnace bottom refractory material structure for liquid deslagging step-type heating furnace |
| CN206094896U (en) * | 2016-08-31 | 2017-04-12 | 怀化辰州机械有限责任公司 | Leak protection heat preservation smelting furnace |
| CN207845722U (en) * | 2018-02-09 | 2018-09-11 | 江阴市蓝天工业炉窑制造有限公司 | Push away steel continuous furnace bottom construction |
| CN209341824U (en) * | 2018-11-22 | 2019-09-03 | 沁阳市碳素有限公司 | A kind of bottom construction of can-type calcine furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111940508A (en) * | 2020-07-06 | 2020-11-17 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Titanium blank heating process of steel pushing heat accumulating type heating furnace |
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