CN114147040B - Integrated treatment device and method for waste magnesia carbon bricks - Google Patents
Integrated treatment device and method for waste magnesia carbon bricks Download PDFInfo
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- CN114147040B CN114147040B CN202111634406.1A CN202111634406A CN114147040B CN 114147040 B CN114147040 B CN 114147040B CN 202111634406 A CN202111634406 A CN 202111634406A CN 114147040 B CN114147040 B CN 114147040B
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- kiln body
- hydration chamber
- magnesia carbon
- pipeline
- raw materials
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- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 96
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000011449 brick Substances 0.000 title claims abstract description 48
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 48
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 48
- 239000002699 waste material Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000006703 hydration reaction Methods 0.000 claims abstract description 71
- 230000036571 hydration Effects 0.000 claims abstract description 70
- 230000008569 process Effects 0.000 claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 20
- 239000000779 smoke Substances 0.000 claims abstract description 15
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims description 45
- 238000001816 cooling Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 239000002918 waste heat Substances 0.000 claims description 4
- 230000010354 integration Effects 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 230000000887 hydrating effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D1/00—Devices using naturally cold air or cold water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to an integrated treatment device and method for waste magnesia carbon bricks, wherein the device comprises a storage bin, a hydration chamber, a kiln body and a discharger which are coaxially arranged in sequence from top to bottom; the top of the hydration chamber is provided with a smoke exhaust pipeline and a sprayer, and the periphery of the hydration chamber is provided with a plurality of pushing devices along the circumferential direction; the bottom of the hydration chamber is connected with the top of the kiln body through a chute; an air inlet is arranged at one side of the upper part of the kiln body and connected with an air mixing pipeline, and a plurality of burners are arranged at the lower part of the kiln body along the circumferential direction; the bottom of the kiln body is provided with a discharger. The device has the functions of carrying out hydration impurity removal and drying integrated treatment on the waste magnesia carbon bricks, greatly improves the process integration level, shortens the treatment time and effectively reduces the occupied area; the hydration chamber is utilized for heat accumulation, so that the heat energy is saved to the greatest extent; and the harmful gas generated in the heat treatment process can be collected, treated and utilized, so that the environmental pollution is further avoided, and the energy is saved.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to an integrated treatment device and method for waste magnesia carbon bricks.
Background
Magnesia carbon bricks are refractory materials which are raised in the 70 s of the 20 th century, and are widely applied to the steel smelting industry all the time due to good use effect, but at the same time, a large number of waste magnesia carbon bricks are produced each year. With the increasing reduction of magnesium ore resources and the gradual penetration of environmental awareness in recent years, the recycling of waste magnesia carbon bricks is more and more important.
The metal aluminum powder is one of the most commonly used additives for magnesia carbon bricks, and the metal aluminum powder can react to generate Al 4C3 and a small amount of AlN in the using process of the magnesia carbon bricks. The components can generate hydration reaction when meeting water, and gases such as methane, ammonia gas and the like are generated, so that the recycled refractory material products are expanded and cracked and even pulverized, therefore, the waste magnesia carbon bricks are required to be hydrated in the recycling process, impurity components are removed in advance, and the waste magnesia carbon bricks are fully dried.
The traditional magnesia carbon brick recovery treatment process mainly comprises the steps of hydrating crushed waste magnesia carbon bricks at normal temperature, naturally airing and drying the waste magnesia carbon bricks, wherein the waste magnesia carbon bricks are obviously affected by seasonal changes, and the treatment time is long; and impurities in the waste magnesia carbon bricks are not treated cleanly due to the low temperature of natural drying. In addition, most of the gases such as methane, ammonia and the like generated in the airing process are naturally discharged, so that the environment is polluted, the resources are wasted, and certain health hazards are brought to operators.
In view of the disadvantages of the natural airing process, some enterprises adopt drum-type drying equipment to dry waste magnesia carbon bricks, such as a drying drum, a rotary drying kiln and the like, but when the equipment works, materials move greatly, so that dust leakage pollution and noise problems are easily caused; more importantly, the drying equipment can only carry out drying treatment on materials, the hydration of waste magnesia carbon bricks still needs to be independently treated in advance, the process integration level is low, and the efficiency is low.
Disclosure of Invention
The invention provides an integrated treatment device and method for waste magnesia carbon bricks, wherein the device has the functions of carrying out hydration impurity removal and drying integrated treatment on the waste magnesia carbon bricks, so that the process integration level is greatly improved, the treatment time is shortened, and the occupied area is effectively reduced; the hydration chamber is utilized for heat accumulation, so that the heat energy is saved to the greatest extent; and the harmful gas generated in the heat treatment process can be collected, treated and utilized, so that the environmental pollution is further avoided, and the energy is saved.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
An integrated treatment device for waste magnesia carbon bricks comprises a storage bin, a hydration chamber, a kiln body and a discharger which are coaxially arranged in sequence from top to bottom; the top of the hydration chamber is provided with a smoke exhaust pipeline and a sprayer, and the periphery of the hydration chamber is provided with a plurality of pushing devices along the circumferential direction; the bottom of the hydration chamber is connected with the top of the kiln body through a chute; an air inlet is arranged at one side of the upper part of the kiln body and connected with an air mixing pipeline, and a plurality of burners are arranged at the lower part of the kiln body along the circumferential direction; the bottom of the kiln body is provided with a discharger.
The top of storage silo establishes the charge door, and the round rain-proof canopy is established to the bottom outside of storage silo.
An automatic regulating valve is arranged on the air mixing pipeline and is controlled in an interlocking way with a temperature measuring device arranged at the top of the kiln body; one end of the burner extends into the kiln body, and the other end of the burner is connected with the fuel pipeline and the combustion-supporting air pipeline.
The bottom of the discharger is provided with a discharge port and an air inlet, the discharge port is connected with a discharge pipeline, and the air inlet is connected with a cooling air pipeline.
The cross section of the hydration chamber is polygonal or circular.
The sprayer is provided with a plurality of spray heads along the circumference of the hydration chamber.
The bottom of the smoke exhaust pipeline is provided with a plurality of smoke inlets along the circumference of the hydration chamber.
The chute is arranged at the center of the bottom of the hydration chamber.
A plurality of support columns are uniformly arranged between the hydration chamber and the kiln body along the circumferential direction.
An integrated treatment method of waste magnesia carbon bricks comprises the following steps:
1) Adding waste magnesia carbon bricks which are crushed to a set particle size range and are wet mixed by adding water into a storage bin as raw materials;
2) The raw materials stay in the storage bin for a period of time and then enter the hydration chamber; the pushing device periodically pushes materials according to a set time interval, so that raw materials with hydration impurity removal of the lowest layer in the hydration chamber enter the kiln body along the chute, and raw materials of the upper layer sequentially move to the lower layer; in the process, the sprayer sprays water into the hydration chamber intermittently or continuously;
3) Mixing and burning fuel and combustion-supporting air in a burner to generate hot air to dry raw materials in the kiln body; the raw materials stay in the kiln body for a period of time to finish the drying process; the discharger periodically discharges according to a set time interval, so that the dried raw materials at the lowest layer in the kiln body are discharged into a corresponding receiving device along a discharging pipeline; simultaneously, the raw materials at the upper layer in the kiln body sequentially move to the lower layer;
4) In the process of hydration impurity removal and drying of the raw materials, cooling air is introduced into the kiln body through a cooling air pipeline to cool the raw materials at the lowest layer in the kiln body; cold air is introduced into the kiln body and the hydration chamber through the air doping pipeline to regulate the temperature, and the flow of the cold air is automatically controlled through interlocking the automatic regulating valve and a temperature measuring device at the top of the kiln body; the kiln body and dust-containing gas and flue gas in the hydration chamber are exhausted through a smoke exhaust pipeline and are collected to a flue gas treatment device for unified treatment and waste heat recovery.
Compared with the prior art, the invention has the beneficial effects that:
1) The device provided by the invention has the functions of hydration impurity removal and drying of the waste magnesia carbon bricks, and is high in process integration level and simple to operate;
2) The invention can greatly reduce the treatment time of the waste magnesia carbon bricks, shortens the original time of 7-10 days required by natural airing to be within 3 days, and effectively reduces the occupied area;
3) The flow direction of hot air in the device is opposite to the moving direction of waste magnesia carbon brick raw materials, stepped temperature distribution is generated, a storage bin, a hydration chamber and a kiln body are respectively arranged in corresponding temperature intervals, the purpose of fully accumulating heat is achieved, the treatment requirements of waste magnesia carbon bricks in different stages are met, and the heat energy utilization rate is high;
4) The device has the advantages that the material does not act greatly when in operation, and dust emission and noise pollution are effectively avoided;
5) Dust-containing gas and flue gas generated in the treatment process of the waste magnesia carbon bricks can be collected, treated or utilized in a centralized way, so that environmental pollution is avoided, and energy is saved.
Drawings
Fig. 1 is a schematic structural diagram of an integrated treatment device for waste magnesia carbon bricks.
In the figure: 1. the material charging device comprises a material charging port 2, a material storage bin 3, a rain-proof shed 4, a smoke discharging pipeline 5, a hydration chamber 6, a sprayer 7, a material pushing device 8, a chute 9, a support column 10, a kiln body 11, an automatic regulating valve 12, an air doping pipeline 13, a burner 14, a material discharging device 15, a material discharging pipeline 16 and a cooling air pipeline
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 integrated treatment device for waste magnesia carbon bricks comprises a storage bin 2, a hydration chamber 5, a kiln body 10 and a discharger 14 which are coaxially arranged from top to bottom in sequence; the top of the hydration chamber 5 is provided with a smoke exhaust pipeline 4 and a sprayer 6, and the periphery of the hydration chamber 5 is provided with a plurality of pushing devices 7 along the circumferential direction; the bottom of the hydration chamber 5 is connected with the top of the kiln body 10 through a chute 8; an air inlet is formed in one side of the upper part of the kiln body 10 and connected with an air doping pipeline 12, and a plurality of burners 13 are arranged at the lower part of the kiln body 10 along the circumferential direction; a discharger 14 is arranged at the bottom of the kiln body 10.
The top of the storage bin 2 is provided with a feed inlet 1, and the outer side of the bottom of the storage bin 2 is provided with a circle of rainproof shed 3.
An automatic regulating valve 11 is arranged on the air mixing pipeline 12, and the automatic regulating valve 11 is controlled in an interlocking manner with a temperature measuring device arranged at the top of the kiln body 10; one end of the burner 13 extends into the kiln body 10, and the other end is connected with a fuel pipeline and a combustion-supporting air pipeline.
The bottom of the discharger 14 is provided with a discharge port and an air inlet, the discharge port is connected with a discharge pipeline 15, and the air inlet is connected with a cooling air pipeline 16.
The cross section of the hydration chamber 5 is polygonal or circular.
The sprayer 6 is provided with a plurality of spray heads along the circumference of the hydration chamber 5.
The bottom of the smoke exhaust pipeline 4 is provided with a plurality of smoke inlets along the circumference of the hydration chamber 5.
The chute 8 is arranged at the center of the bottom of the hydration chamber 5.
A plurality of support columns 9 are uniformly arranged between the hydration chamber 5 and the kiln body 10 along the circumferential direction.
The integrated treatment method of the waste magnesia carbon bricks comprises the following steps:
1) Adding waste magnesia carbon bricks which are crushed to a set particle size range and are added with water for wet mixing into a storage bin 2 as raw materials;
2) The raw materials stay in the storage bin 2 for a period of time and then enter the hydration chamber 5; the pushing device 7 carries out periodical pushing according to a set time interval, so that raw materials with hydration impurity removal of the lowest layer in the hydration chamber 5 enter the kiln body 10 along the chute 8, and meanwhile, raw materials of the upper layer sequentially move to the lower layer; in the process, the sprayer 6 sprays water into the hydration chamber 5 intermittently or continuously;
3) The fuel and the combustion air are mixed and burned in the burner 13 to generate hot air for drying the raw materials in the kiln body 10; the raw materials stay in the kiln body 10 for a period of time to finish the drying process; the discharger 14 performs periodical discharge according to a set time interval, so that the dried raw materials at the lowest layer in the kiln body 10 are discharged into a corresponding receiving device along a discharge pipeline 15; simultaneously, the raw materials at the upper layer in the kiln body 10 sequentially move to the lower layer;
4) In the process of hydration impurity removal and drying of the raw materials, cooling air is introduced into the kiln body 10 through a cooling air pipeline 16 to cool the raw materials at the lowest layer; cold air is introduced through an air doping pipeline 12 to regulate the temperature in the kiln body 10 and the hydration chamber 5, and the flow of the cold air is automatically controlled by interlocking the automatic regulating valve 11 with a temperature measuring device at the top of the kiln body 10; the dust-containing gas and the flue gas in the kiln body 10 and the hydration chamber 5 are discharged through the smoke exhaust pipeline 4 and are collected to the flue gas treatment device for unified treatment and waste heat recovery and utilization.
The following examples are given by way of illustration of detailed embodiments and specific procedures based on the technical scheme of the present invention, but the scope of the present invention is not limited to the following examples.
[ Example ]
As shown in fig. 1, the embodiment adopts the device to treat the waste magnesia carbon bricks, and the specific process is as follows:
1) Adding waste magnesia carbon bricks which are crushed to a set particle size range and are added with water for wet mixing into a storage bin 2 as raw materials; setting the granularity range to be 0-20 mm, and adding water in the volume ratio of 0-20%;
2) The raw materials stay in the storage bin 2 for a period of time and then enter the hydration chamber 5; the pushing device 7 performs periodical pushing action according to a set time interval, the raw materials of which the lowest layer in the hydration chamber 5 is subjected to hydration impurity removal are pushed into the kiln body 10 along the chute 8, and meanwhile, the raw materials of the upper layer sequentially move downwards until the raw materials of the upper layer move to the lowest layer; in the process, the sprayer 6 sprays water into the hydration chamber 5 intermittently according to set time intervals;
3) The fuel and the combustion air are mixed and burned in the burner 13 to generate hot air, and the raw materials in the kiln body 10 are dried; the raw materials stay in the kiln body 10 for a period of time to finish the drying process; the discharger 14 periodically acts at set time intervals to discharge the dried raw materials at the lowest layer in the kiln body 10 into the corresponding receiving device along the discharge pipeline 15, and simultaneously the raw materials at the upper layer in the kiln body 10 sequentially move downwards until the raw materials move to the lowest layer;
4) In the process of hydration impurity removal and drying of the raw materials, cooling air is introduced into the kiln body 10 through a cooling air pipeline 16 to cool the raw materials at the lowest layer; cold air is introduced through an air mixing pipeline 12 to regulate the temperature in the kiln body 10 and the hydration chamber 5, and the flow of the cold air is automatically controlled by interlocking the automatic regulating valve 11 with a temperature measuring device at the top of the hydration chamber 5; all dust-containing gas and flue gas in the kiln body 10 and the hydration chamber 5 are discharged through the smoke exhaust pipeline 4 and are collected to a flue gas treatment device for unified treatment and waste heat recycling;
in the embodiment, the treatment time of the hydration and impurity removal process of the waste magnesia carbon brick raw material is 12-48 h, and the temperature in the hydration chamber is controlled at 100-150 ℃; the treatment time of the waste magnesia carbon brick raw material drying process is 6-24 h, and the temperature in the kiln body is controlled at 150-300 ℃.
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 (10)
1. The integrated treatment device for the waste magnesia carbon bricks is characterized by comprising a storage bin, a hydration chamber, a kiln body and a discharger which are coaxially arranged in sequence from top to bottom; the top of the hydration chamber is provided with a smoke exhaust pipeline and a sprayer, and the periphery of the hydration chamber is provided with a plurality of pushing devices along the circumferential direction; the bottom of the hydration chamber is connected with the top of the kiln body through a chute; an air inlet is arranged at one side of the upper part of the kiln body and connected with an air mixing pipeline, and a plurality of burners are arranged at the lower part of the kiln body along the circumferential direction; the bottom of the kiln body is provided with a discharger.
2. The integrated waste magnesia carbon brick treatment device according to claim 1, wherein the top of the storage bin is provided with a feed inlet, and the outer side of the bottom of the storage bin is provided with a circle of waterproof shed.
3. The integrated waste magnesia carbon brick treatment device according to claim 1, wherein the air mixing pipeline is provided with an automatic regulating valve, and the automatic regulating valve is controlled in an interlocking manner with a temperature measuring device arranged at the top of the kiln body; one end of the burner extends into the kiln body, and the other end of the burner is connected with the fuel pipeline and the combustion-supporting air pipeline.
4. The integrated waste magnesia carbon brick treatment device according to claim 1, wherein the bottom of the discharger is provided with a discharge port and an air inlet, the discharge port is connected with a discharge pipeline, and the air inlet is connected with a cooling air pipeline.
5. The integrated waste magnesia carbon brick treatment device according to claim 1, wherein the cross section of the hydration chamber is polygonal or circular.
6. The integrated waste magnesia carbon brick treatment device according to claim 1, wherein the sprayer is provided with a plurality of spray heads along the circumference of the hydration chamber.
7. The integrated waste magnesia carbon brick treatment device according to claim 1, wherein the bottom of the smoke exhaust pipe is provided with a plurality of smoke inlets along the circumference of the hydration chamber.
8. The integrated waste magnesia carbon brick treatment device according to claim 1, wherein the chute is arranged at the center of the bottom of the hydration chamber.
9. The integrated waste magnesia carbon brick treatment device according to claim 1, wherein a plurality of support columns are uniformly arranged between the hydration chamber and the kiln body along the circumferential direction.
10. The integrated treatment method of waste magnesia carbon bricks based on the device as claimed in any one of claims 1 to 9, which is characterized by comprising the following steps:
1) Adding waste magnesia carbon bricks which are crushed to a set particle size range and are wet mixed by adding water into a storage bin as raw materials;
2) The raw materials stay in the storage bin for a period of time and then enter the hydration chamber; the pushing device periodically pushes materials according to a set time interval, so that raw materials with hydration impurity removal of the lowest layer in the hydration chamber enter the kiln body along the chute, and raw materials of the upper layer sequentially move to the lower layer; in the process, the sprayer sprays water into the hydration chamber intermittently or continuously;
3) Mixing and burning fuel and combustion-supporting air in a burner to generate hot air to dry raw materials in the kiln body; the raw materials stay in the kiln body for a period of time to finish the drying process; the discharger periodically discharges according to a set time interval, so that the dried raw materials at the lowest layer in the kiln body are discharged into a corresponding receiving device along a discharging pipeline; simultaneously, the raw materials at the upper layer in the kiln body sequentially move to the lower layer;
4) In the process of hydration impurity removal and drying of the raw materials, cooling air is introduced into the kiln body through a cooling air pipeline to cool the raw materials at the lowest layer in the kiln body; cold air is introduced into the kiln body and the hydration chamber through the air doping pipeline to regulate the temperature, and the flow of the cold air is automatically controlled through interlocking the automatic regulating valve and a temperature measuring device at the top of the kiln body; the kiln body and dust-containing gas and flue gas in the hydration chamber are exhausted through a smoke exhaust pipeline and are collected to a flue gas treatment device for unified treatment and waste heat recovery.
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| CN101343188A (en) * | 2008-08-21 | 2009-01-14 | 武汉科技大学 | Low-carbon magnesium carbon brick and preparation thereof |
| JP2013001606A (en) * | 2011-06-17 | 2013-01-07 | Jfe Steel Corp | Method for recycling used magnesia carbon brick and method for manufacturing magnesia carbon brick |
| CN203642660U (en) * | 2013-11-19 | 2014-06-11 | 辽宁青花耐火材料股份有限公司 | Shaft kiln for recovering and treating waste magnesia carbon bricks |
| KR101703844B1 (en) * | 2015-11-16 | 2017-02-08 | 주식회사 금강알씨 | The abandoned magnesia carbon recycling system |
| CN105859307A (en) * | 2016-03-30 | 2016-08-17 | 重庆钢铁(集团)有限责任公司 | Method for processing and recovering carboniferous waste fireproof materials |
| CN207610513U (en) * | 2017-11-28 | 2018-07-13 | 甘肃酒钢集团科力耐火材料股份有限公司 | A kind of drying equipment after waste magnesia carbon brick hydration process |
| CN108424127A (en) * | 2018-03-12 | 2018-08-21 | 海城利尔麦格西塔材料有限公司 | A kind of processing method of useless magnesite-chrome brick |
| CN210486491U (en) * | 2019-09-06 | 2020-05-08 | 大石桥市镁东福利耐材有限公司 | Environment-friendly energy-saving furnace for reduction granulation of waste carbon-containing bricks |
| CN111879096A (en) * | 2020-07-30 | 2020-11-03 | 中冶焦耐(大连)工程技术有限公司 | Hydration, impurity removal and drying integrated heat treatment device and method for waste magnesia carbon bricks |
| CN216728751U (en) * | 2021-12-29 | 2022-06-14 | 中冶焦耐(大连)工程技术有限公司 | Waste magnesia carbon brick integrated treatment device |
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