CN113817483B - Construction method for chute area of coke dry quenching furnace - Google Patents
Construction method for chute area of coke dry quenching furnace Download PDFInfo
- Publication number
- CN113817483B CN113817483B CN202111151022.4A CN202111151022A CN113817483B CN 113817483 B CN113817483 B CN 113817483B CN 202111151022 A CN202111151022 A CN 202111151022A CN 113817483 B CN113817483 B CN 113817483B
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- China
- Prior art keywords
- chute
- bracket
- area
- masonry
- dry quenching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000010791 quenching Methods 0.000 title claims abstract description 34
- 230000000171 quenching effect Effects 0.000 title claims abstract description 34
- 238000010276 construction Methods 0.000 title claims abstract description 11
- 239000000571 coke Substances 0.000 title claims description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 239000011449 brick Substances 0.000 claims abstract description 32
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 18
- 229920000742 Cotton Polymers 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 4
- 230000003203 everyday effect Effects 0.000 claims description 4
- 238000005192 partition Methods 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011468 face brick Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B29/00—Other details of coke ovens
- C10B29/02—Brickwork, e.g. casings, linings, walls
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention relates to a construction method of a chute area of a dry quenching furnace, wherein the number of layers built in the chute area is not more than 3, each layer of masonry is controlled to be high and smooth according to design requirements during building, and the bracket section in the middle of the chute is additionally controlled to be in position of the bracket axis; ensuring full mortar for brick joints during masonry; building an upper layer of brickwork after the lower layer of brickwork is qualified; after the bracket sections in the middle of the chute are completely built, the bracket and the crown bricks are heated by a heating device, so that the fireclay is completely solidified; and then removing the heating device and then building the masonry at the upper part of the chute. According to the invention, the fireclay at the bracket of the chute area is heated and solidified in advance, so that the problems of sinking of the annular air duct and cracking of the chute partition wall caused by deformation of the bracket mortar joint are prevented, and the masonry quality and the service life of the dry quenching furnace are effectively improved.
Description
Technical Field
The invention relates to the technical field of coke dry quenching furnaces, in particular to a construction method of a chute area of a coke dry quenching furnace.
Background
The dry quenching has the functions of saving energy, reducing consumption, protecting environment and improving coke quality, and is widely applied in recent years. The dry quenching furnace is key equipment of a dry quenching technology, and comprises a pre-storing area, an annular air duct area, a chute area and a cooling area from top to bottom, wherein brackets of the chute area are built by a plurality of layers of bracket bricks, and the dry quenching furnace is an important structure for supporting an inner annular wall of the dry quenching furnace. In actual production, the corbels are easy to wear, crack and collapse due to the fact that the corbels are heavy in bearing, frequent in running temperature fluctuation, and subjected to scouring of high-temperature coke in the coke dry quenching furnace and high-temperature circulating air flow containing coke powder for a long time, and the like, and are the bottleneck for determining the service life of the coke dry quenching furnace refractory. The bracket needs to be overhauled frequently in the current production process, so that the production efficiency of the dry quenching is greatly reduced, and the production cost is increased.
The service life of the bracket of the chute is related to the factors such as the structure of the bracket, the selection of refractory materials, the masonry quality, the production operation and the like. Wherein cold construction masonry is a very important one. Several control methods for dry quenching chute masonry are described in chinese patent applications with publication numbers CN101928575A, CN107129814a and CN101948697a, respectively, and the masonry quality of chute areas is improved by controlling the elevation, flatness, central axis, mortar fullness, arch tire support and other modes of bracket. However, because the moisture in the mortar joints between refractory bricks volatilizes relatively slowly, the mortar joints can be completely solidified and sintered only by a baking furnace, and particularly, in order to improve the bonding strength of the mortar, some manufacturers adopt resin and ethanol/glycol as bonding agents, the boiling point of the solvent is higher, and the volatilization is more difficult, so that the actual cold strength of the mortar is relatively low. The bracket of the chute needs to support the weight of the annular wall in the annular air channel area, if the fireclay in the mortar joint of the bracket area cannot be completely solidified, the bracket of the chute is easy to deform, so that the annular air channel area sinks, and the masonry quality of the coke dry quenching furnace is affected. On site, after many coke dry quenching furnaces are built in a cold state, cracks with different sizes appear at the top of a chute partition wall of the coke dry quenching furnaces, and the width of some cracks is even more than 20mm, so that the service life of the coke dry quenching is seriously influenced; the reason is that the bracket mortar joint is not dried and the annular air duct area sinks.
Disclosure of Invention
The invention provides a construction method of a chute area of a dry quenching furnace, which is used for preventing the problems of sinking of an annular air duct and cracking of a chute partition wall caused by deformation of a bracket mortar joint by heating and solidifying fireclay at the bracket of the chute area in advance, thereby effectively improving the masonry quality and prolonging the service life of the dry quenching furnace.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
the dry quenching furnace comprises a cooling area, a chute area, an annular air duct area and a pre-storing area from bottom to top; the chute area is divided into a chute lower part, a chute middle bracket section and a chute upper part, wherein the chute middle bracket section comprises a plurality of brackets for supporting the annular air duct and arch bricks arranged above the brackets; when the bracket is constructed, the number of layers of masonry per day in the chute area is not more than 3, the elevation and the flatness of each layer of masonry are controlled according to the design requirement when the masonry is built, and the bracket section in the middle of the chute additionally controls the position of the bracket axis; ensuring full mortar for brick joints during masonry; building an upper layer of brickwork after the lower layer of brickwork is qualified; after the bracket sections in the middle of the chute are completely built, the bracket and the crown bricks are heated by a heating device, so that the fireclay is completely solidified; and then removing the heating device and then building the masonry at the upper part of the chute.
One layer of bracket section in the middle of the chute is built every day, and the flatness of each layer of masonry is controlled within 3 mm.
The heating device is a heat tracing belt or a heating rod; the heating process is to wind a heat tracing band or a heating rod around the bracket and the crown brick, wrap heat preservation cotton with the thickness not less than 20mm outside the heat tracing band or the heating rod, and place a thermometer in the heat preservation cotton to monitor the heating temperature.
The heating temperature of the bracket section in the middle of the chute is 120-250 ℃, and the heating time is not less than 12 hours.
The heating part also comprises a masonry at the upper part of the chute.
The heating part also comprises a working surface of the whole chute area and fireclay in the brick joints.
When the arch bricks are built, steel structural supports are arranged below the arch bricks and are removed in front of the baking furnace.
Compared with the prior art, the invention has the beneficial effects that:
the quality problems that the annular air duct and the brickwork of the chute area sink, cracks appear at the upper part of the chute partition wall and the like due to deformation of the bracket mortar joints of the chute in the laying process of the dry quenching furnace are fundamentally solved, the laying quality of the dry quenching furnace body is improved, the service life of the dry quenching furnace is prolonged, and the service efficiency of the dry quenching furnace is improved.
Drawings
Fig. 1 is a schematic structural view of a chute zone of a coke dry quenching furnace according to the present invention.
In the figure: 1. the upper part of the chute is 2, the middle bracket section of the chute is 3, the lower part of the chute is 4, the arched roof brick is 5, and the bracket is
Detailed Description
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
as shown in fig. 1, the invention relates to a construction method of a chute area of a dry quenching furnace, wherein the dry quenching furnace consists of a cooling area, a chute area, an annular air duct area and a pre-storing area from bottom to top; the chute area is divided into a chute lower part 3, a chute middle bracket section 2 and a chute upper part 1, wherein the chute middle bracket section 2 comprises a plurality of brackets 5 for supporting an annular air duct and crown bricks 4 arranged above the brackets 5; when in construction, the number of layers of masonry per day in the chute area is not more than 3, and each layer of masonry is controlled to be high in elevation and smooth according to design requirements when being built, and the bracket section 2 in the middle of the chute is additionally used for controlling the position of the bracket axis; ensuring full mortar for brick joints during masonry; building an upper layer of brickwork after the lower layer of brickwork is qualified; after the bracket sections 2 in the middle of the chute are completely built, the bracket 5 and the crown brick 4 are heated by a heating device, so that the fireclay is completely solidified; then the heating device is dismantled, and then the masonry of the upper part 1 of the chute is carried out.
One layer of bracket section 2 in the middle of the chute is built every day, and the flatness of each layer of brickwork is controlled within 3 mm.
The heating device is a heat tracing belt or a heating rod; the heating process is to wind a heat tracing band or a heating rod around the bracket 5 and the crown brick 4, wrap heat preservation cotton with the thickness not less than 20mm outside the heat tracing band or the heating rod, and place a thermometer in the heat preservation cotton to monitor the heating temperature.
The heating temperature of the bracket section 2 in the middle of the chute is 120-250 ℃, and the heating time is not less than 12 hours.
The heating part also comprises a masonry at the upper part 1 of the chute.
The heating part also comprises a working surface of the whole chute area and fireclay in the brick joints.
When the crown brick 4 is built, a steel structural support is arranged below the crown brick 4 and removed in front of the baking furnace.
In the construction method, the number of layers of masonry per day in the whole chute area is controlled to be not more than 3, each layer of masonry is required to be strictly controlled to have elevation and flatness (the bracket is required to control the position of the axis of the bracket), and the next layer of masonry is ensured to be built after mortar at the brick joint is full; after the middle bracket section 2 of the chute is built, the bracket section of the middle of the chute comprises brackets 5 and crown bricks 4 to be heated, so that the fire clay in the mortar joints is completely solidified, and then the heating device is removed, and then the masonry of the upper part of the chute is built.
Further, after the bracket section 2 in the middle of the chute is built, heating devices such as heat tracing bands or heating bars are uniformly wound around the bracket 5 and the crown brick 4, and the bracket and the crown brick are generally built by silicon carbide bricks or silicon nitride combined with the silicon carbide bricks, so that the heat conduction performance is very good, and the heat can be quickly conducted into the masonry, so that the temperature of the masonry is uniformly raised. And then wrapping heat preservation cotton with the thickness not less than 20mm on the outer parts of the bracket 5 and the crown brick 4, and placing a thermometer in the heat preservation cotton to monitor the heating temperature. And when necessary, the iron wires are used for binding and fixing the heat-insulating cotton, so that the heating effect of the heat-insulating cotton is ensured.
The power and the number of the heating devices are determined according to the volume of the bracket 5, the heating temperature is 120-250 ℃, the specific temperature is determined to be related to the type of the solvent in the fireclay binder, and if the fireclay binder is water, the heating temperature is not lower than 120 ℃; if the fireclay binder is an alcohol such as ethylene glycol, the heating temperature is not lower than the boiling point temperature. The heating time is not less than 12 hours to ensure complete hardening of the fireclay.
The ramp zone heating zone may also further comprise the upper ramp portion 1, or the working face bricks of the entire ramp zone and the fireclay in the mortar joints.
The bracket section 2 in the middle of the chute can only be built into one layer every day, the flatness of each layer is controlled below 3mm, and the upper surface of each layer of masonry is strictly forbidden to incline downwards. It is necessary to ensure that the mortar fullness between the courses of masonry of the brackets reaches 95% or more and to control the center position of the brackets 5 and the hole width between the brackets according to design requirements.
When the arch brick 4 at the top of the bracket is built, a steel structure support is arranged below the arch brick, a supporting point of the steel structure support is arranged on a stable scaffold construction platform, the steel structure support is dismounted before the baking furnace, and the baking furnace is required to be quickly removed, so that the annular air duct is prevented from sinking.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. The dry quenching furnace comprises a cooling area, a chute area, an annular air duct area and a pre-storing area from bottom to top; the chute area is divided into a chute lower part, a chute middle bracket section and a chute upper part, wherein the chute middle bracket section comprises a plurality of brackets for supporting the annular air duct and arch bricks arranged above the brackets; the method is characterized in that the number of layers of masonry per day in a chute area is not more than 3 during construction, elevation and flatness of each layer of masonry are controlled according to design requirements during masonry, and the bracket section in the middle of the chute additionally controls the position of the bracket axis; ensuring full mortar for brick joints during masonry; building an upper layer of brickwork after the lower layer of brickwork is qualified; after the bracket sections in the middle of the chute are completely built, the bracket and the crown bricks are heated by a heating device, so that the fireclay is completely solidified; and then removing the heating device and then building the masonry at the upper part of the chute.
2. The method for constructing the chute area of the coke dry quenching furnace according to claim 1, wherein the bracket section in the middle of the chute is built into one layer every day, and the flatness of each layer of brickwork is controlled within 3 mm.
3. The method for constructing a chute area of a dry quenching furnace according to claim 1, wherein the heating device is a heat tracing belt or a heating rod; the heating process is to wind a heat tracing band or a heating rod around the bracket and the crown brick, wrap heat preservation cotton with the thickness not less than 20mm outside the heat tracing band or the heating rod, and place a thermometer in the heat preservation cotton to monitor the heating temperature.
4. The method for constructing the chute area of the coke dry quenching furnace according to claim 1 or 3, wherein the heating temperature of the bracket section in the middle of the chute is 120-250 ℃ and the heating time is not less than 12h.
5. The method for constructing a chute area of a dry quenching furnace according to claim 1, wherein a steel structural support is installed under the crown block when the crown block is constructed, and the steel structural support is removed in front of the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111151022.4A CN113817483B (en) | 2021-09-29 | 2021-09-29 | Construction method for chute area of coke dry quenching furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111151022.4A CN113817483B (en) | 2021-09-29 | 2021-09-29 | Construction method for chute area of coke dry quenching furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113817483A CN113817483A (en) | 2021-12-21 |
| CN113817483B true CN113817483B (en) | 2024-01-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111151022.4A Active CN113817483B (en) | 2021-09-29 | 2021-09-29 | Construction method for chute area of coke dry quenching furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113817483B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948697A (en) * | 2010-09-25 | 2011-01-19 | 中国十九冶集团有限公司武汉分公司 | Novel method for building slope air course of coke dry quenching furnace |
| CN103350221A (en) * | 2013-07-24 | 2013-10-16 | 武汉钢铁(集团)公司 | Method for maintaining and building 320-ton torpedo ladle cone working layer |
| CN106242599A (en) * | 2016-08-08 | 2016-12-21 | 武汉钢铁股份有限公司 | The fast repairing material at coke dry quenching furnace oblique flue bracket position and method for repairing and mending thereof |
-
2021
- 2021-09-29 CN CN202111151022.4A patent/CN113817483B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948697A (en) * | 2010-09-25 | 2011-01-19 | 中国十九冶集团有限公司武汉分公司 | Novel method for building slope air course of coke dry quenching furnace |
| CN103350221A (en) * | 2013-07-24 | 2013-10-16 | 武汉钢铁(集团)公司 | Method for maintaining and building 320-ton torpedo ladle cone working layer |
| CN106242599A (en) * | 2016-08-08 | 2016-12-21 | 武汉钢铁股份有限公司 | The fast repairing material at coke dry quenching furnace oblique flue bracket position and method for repairing and mending thereof |
Non-Patent Citations (1)
| Title |
|---|
| 干熄焦炉斜道区存在问题的分析与探索;钱虎林 等;《安徽冶金》(2);全文 * |
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| CN113817483A (en) | 2021-12-21 |
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