CN113061673A - Device and method for recycling crushing waste heat of high-temperature steel slag rotating bed - Google Patents
Device and method for recycling crushing waste heat of high-temperature steel slag rotating bed Download PDFInfo
- Publication number
- CN113061673A CN113061673A CN202110297684.6A CN202110297684A CN113061673A CN 113061673 A CN113061673 A CN 113061673A CN 202110297684 A CN202110297684 A CN 202110297684A CN 113061673 A CN113061673 A CN 113061673A
- Authority
- CN
- China
- Prior art keywords
- slag
- bed
- temperature
- steel slag
- crushing
- 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.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
- B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/052—Apparatus features including rotating parts
- C21B2400/054—Disc-shaped or conical parts for cooling, dispersing or atomising of molten slag rotating along vertical axis
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/052—Apparatus features including rotating parts
- C21B2400/058—Rotating beds on which slag is cooled
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/068—Receptacle features where the slag is treated with a sealed or controlled environment
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
The invention provides a high-temperature steel slag rotary bed crushing waste heat recovery device and a method, and the device comprises a liquid slag tank (1), a slag dumping machine (2), a rotary bed (5), a slag dumping machine (6), a circulating fan (7), an air pipe (8), a heat exchanger (9), a steam pipe (10), a generator (11) and a solid slag tank (14), wherein the liquid slag tank (1) is arranged on the slag dumping machine (2) in an inclinable manner, the slag dumping machine (6) is arranged above the rotary bed (5), the circulating fan (7) is connected with the rotary bed (5) and the heat exchanger (9) through the air pipe (8), the heat exchanger (9) is connected with the generator (11) through the steam pipe (9), the rotary bed (5) is rotatably arranged between the slag dumping machine (2) and the circulating fan (7), and steel slag is cooled and discharged through the rotary bed (. The invention greatly solves the problem of discharge in the steel slag treatment process, greatly reduces the investment of public and auxiliary facilities such as water, dust removal and the like, effectively reduces the production and operation cost of the steel slag and improves the system income.
Description
Technical Field
The invention relates to the technical field of steel slag treatment, in particular to a device and a method for recycling waste heat generated by crushing a high-temperature molten steel slag by a rotating bed.
Background
In recent years, the annual steel yield of China exceeds 8 hundred million tons, which accounts for about 120-140 kg of steel slag generated by producing one ton of steel, and the annual steel slag generation amount of China exceeds 1 million tons. The steel slag contains two types of resources, namely iron metal resources and inorganic materials such as calcium silicate, and has the material property of resource utilization. For a long time, iron ores in China mainly depend on imports, and resources are very short. The steel slag in China is expected to recover nearly 2000 ten thousand tons of iron resources, and inorganic materials can reach more than 8000 ten thousand tons, so that the method has great significance in resource recovery value.
The high-efficiency recovery of metal iron and inorganic material resources in the steel slag is to perform crushing separation firstly and then realize the separation of the two materials by adopting magnetic separation and other modes, thereby obtaining targeted resource utilization. The steel slag pretreatment process is a precondition for steel slag crushing and magnetic separation treatment, and realizes more efficient crushing, screening and magnetic separation of the steel slag through pretreatment under a high temperature condition.
The prior steel slag pretreatment process comprises production processes such as a hot stuffy method, a hot splashing method, a roller method, a wind quenching method and the like, wherein the hot splashing method has the problems of backward production mode, simple and extensive treatment process, serious environmental pollution, low metal resource recovery rate and the like, and is required to be eliminated as soon as possible; the roller method is only suitable for liquid steel slag with good fluidity, the treatment rate of the steel slag is less than 50%, the equipment operation cost is high, the failure is high, and the roller method is only used for a few steel enterprises in a steel system at present; the air quenching method adopts large air volume to blow off and cool the liquid steel slag into fine particles, is only suitable for treating the liquid steel slag, has low recovery rate of steel metal iron resources, and only one set of air quenching equipment is provided for domestic horse steel.
The domestic main steel slag treatment method is a hot-disintegrating method, and the process has a series of advantages of wide adaptability, good steel slag pulverization effect after hot disintegration, good slag-iron separation effect, high metal iron recovery rate, qualified tailing stability and the like. The existing hot-sealing method is divided into a pool type hot-sealing process and a pressure hot-sealing process. The tank type hot stuffy method adopts a process method of engineering mechanized operation, namely an excavator is used for slagging off and crushing the high-temperature steel slag poured into the hot stuffy tank, and the equipment level and the environmental emission need to be further improved. The crushing method has the advantages of high equipment and automation degree and the like by adopting a mechanical rolling crusher to crush the high-temperature steel slag in a pressing and hot stuffiness mode, but the investment is relatively high, the tightness is poor, and the waste heat recovery cannot be carried out by adopting a water cooling mode in the crushing process.
The slag temperature of the steel slag reaches 1600 ℃, the heat value of each ton of slag exceeds 50kg of standard coal, and a large amount of waste heat resources are contained in the slag. The annual output of steel slag in China exceeds 1 hundred million tons, if all the waste heat resources are recycled, the newly increased economic benefit can reach billions of yuan every year, and the method has huge economic market space. At present, the waste heat recovery of high-temperature slag such as metallurgical slag is still often in a test research stage, and the complete resource utilization of two slag heat resources is often difficult to realize. A large number of laboratory and industrial pilot-scale test researches are carried out at home and abroad aiming at the recovery of the waste heat of the air-quenched steel slag, but the method is improper, the recovery rate of iron resources is low, the production is discontinuous, and the comprehensive economic benefit is poor, so that the production and the application cannot be realized. In addition, smelting slag is adopted to be cooled to generate steam or hot water for heat exchange utilization, but the waste heat utilization rate is low, and the economic condition of industrial operation is not met.
Aiming at the problems of large occupied space, high system investment, incapability of recycling waste heat and the like of the existing steel slag treatment process and equipment, a novel steel slag treatment process is urgently needed to be developed.
Disclosure of Invention
In order to solve the problems, the invention provides a method and equipment for crushing a steel slag rotating bed, which realize the complete recycling of two resources of 'slag heat' while carrying out crushing pretreatment on high-temperature steel slag.
The invention provides a high-temperature steel slag bottom-turning crushing waste heat recovery device which comprises a liquid slag tank, a slag pouring machine, a rotating bed, a slag pulling machine, a circulating fan, an air pipe, a heat exchanger, a steam pipe, a generator and a solid slag tank.
Furthermore, the high-temperature slag in the liquid slag tank is processed into broken slag through a rotating bed, the broken slag is loaded into the solid slag tank through a slag discharge port, the rotating bed body is annular, and the circulating fan is arranged on an inner ring of the rotating bed.
Furthermore, the rotating bed comprises a slag pouring port, a slag discharging port, a diffusing cylinder, a closed cover, a crushing roller, a discharging roller, a material baffle plate, a rotating ring, a rotating wheel, a cushion layer, a material layer, a bottom bed, an air box, an ash bucket, an ash cleaning vehicle, a track and a grate bar, wherein the bottom bed is rotatably arranged between a main body at the lower part of the rotating bed and the closed cover at the upper part of the rotating bed, the air box, the ash bucket, the ash cleaning vehicle and the track at the lower part of the bottom bed are fixedly connected to the main body of the rotating bed from top to bottom in sequence, a circulating fan is connected with the air box through an air.
Furthermore, the slag pouring port is arranged on the closed cover corresponding to the liquid slag tank, the diffusing cylinder penetrates through the closed cover, the side wall of the closed cover is provided with a slag discharging port, the crushing roller and the discharging roller are rotatably arranged on the upper portion of a base in the closed cover along the radial direction, the striker plate is arranged between the slag pouring port and the projection position of the slag discharging port, a cushion layer is arranged between the base and a material layer, the outer side of the base is provided with a rotating ring which is meshed with the rotating wheel, the base is provided with a grate bar corresponding to the position of the air box, and the driving rotation direction of the rotating wheel is in the same direction as the driving rotation direction.
Further, the inner diameter of the deslagging port is 1000-2000mm, the inner diameter of the slag discharging port is 500-1200mm, a fireproof material with the thickness of 50-200mm is built on a steel structure inside the deslagging port, an inorganic heat-insulating material with the thickness of 50-150mm is arranged outside the slag discharging port, inorganic heat-insulating materials with the thickness of 50-150mm are arranged outside the air pipe, the heat exchanger and the steam pipe, and inorganic heat-insulating materials with the thickness of 50-150mm are arranged inside and outside the closed cover.
Further, the crushing roller realizes the rotation of positive and negative two directions through drive arrangement's motor, and forward rotation promotes slag to unloading the mouth direction motion, and reverse rotation promotes slag to pouring the mouth direction motion, the discharge roller is spiral ejection of compact structure, and the discharge roller is rotatory to promote slag to unloading the mouth direction motion.
Furthermore, the rotating wheel drives the rotating ring to drive the bottom bed to rotate, the rotating wheel realizes the rotation in the positive and negative directions through a motor of the driving device, the positive rotation drives the bottom bed to move towards the slag discharging opening, and the reverse rotation drives the bottom bed to move towards the slag pouring opening.
Furthermore, the bottom of the material baffle plate is arranged between the cushion layer and the material layer, the material layer steel slag is blocked by the material baffle plate, and the discharge roller pushes the steel slag to the slag discharge opening for discharging.
Furthermore, the diameter of the crushing roller and the discharge roller is 1000-2500mm, the width of the roller teeth is 50-300mm, 2-6 crushing rollers are uniformly distributed in the rotating bed, the material baffle plate is a steel structure baffle plate, and the thickness is 100-200 mm.
Furthermore, the cushion layer is made of large-particle steel slag, the mass percentage of the particle size of the steel slag is 10-50mm is more than 90%, the thickness of the cushion layer is 50-500mm, and the thickness of the material layer is 200-600 mm.
The invention also provides a method for recycling the rotary-bottom crushing waste heat of the high-temperature steel slag, which adopts the device for recycling the crushing waste heat of the high-temperature steel slag rotary bed to recycle the waste heat and comprises the following steps:
s1, lifting a liquid slag tank containing high-temperature slag by a travelling crane and placing the liquid slag tank on a slag pouring machine, tipping the slag pouring machine at a certain speed to pour the steel slag to a slag pouring port at the upper part of a rotating bed, and dropping the high-temperature slag on the upper part of a cushion layer on a bottom bed to form a material layer;
s2, during deslagging, the bottom bed drives a swivel to rotate under the driving of a rotating wheel to drive a high-temperature steel slag layer to move towards a slag discharging port, and the high-temperature steel slag layer is continuously crushed under the rotating stirring of a crushing roller in the moving process until the requirement of crushing granularity is met;
s3, in the treatment process, cold air provided by the circulating fan sequentially passes through the air box, the grate bar in the bottom bed, the cushion layer and the material layer to realize convective heat exchange on the high-temperature material layer until the high-temperature steel slag is cooled to a certain temperature;
s4, the high-temperature material layer is cooled and crushed after rotating for a circle by the rotating bed to form broken slag, the broken slag is piled up and raised under the action of a material baffle plate, and the raised broken slag is moved to a slag discharging port under the rotating push of a discharging roller and falls into a solid slag tank for subsequent hot stuffy treatment of steel slag;
and S5, converting convection heat exchange between the cold air and the high-temperature material layer into hot air, enabling the hot air to enter a heat exchanger through an air pipe to obtain pressure steam, conveying the steam to a generator through a steam pipe to generate electricity, cooling the hot air through the heat exchanger to obtain cold air, and recycling the cold air through a circulating fan to cool the high-temperature slag.
Further, in the steps S1 to S5, the slag pouring time of a single liquid slag tank is 10-60 minutes, the crushing treatment time is 10-60 minutes, the rotating speed of a crushing roller is 3-30 revolutions per minute, the granularity of crushed slag particles obtained by crushing high-temperature slag is more than 80 percent, and the rotating speed of a discharging roller is 3-30 revolutions per minute.
Further, in the steps S1 to S5, the cooling air volume of the high-temperature slag is 1000-4000m3/h, and the temperature of the broken slag at the slag discharging port is controlled at 1000-400 ℃.
Further, in the steps S1 to S5, the temperature of cooling air provided by the circulating fan is 200-.
Further, in the step S1, under the condition that solidification phenomena such as high-temperature slag incrustation in the liquid slag tank affect that uniform slag pouring is difficult, the slag pouring machine is adopted to perform slag pouring operation, so as to uniformly pour the solidified high-temperature slag into the slag pouring opening.
And further, S6, collecting fine-particle steel slag by an ash hopper at the lower part of the air box, and periodically clearing and conveying the fine-particle steel slag by using an ash removal vehicle, wherein the clearing period is 1-3 days.
The rotary bed is used as a core device for cooling and crushing the high-temperature steel slag, the fixed crushing roller is used for efficiently crushing the steel slag, the circulating air is used for air cooling the high-temperature steel slag, and the heat exchanger and the generator are used for recycling the waste heat of the high-temperature steel slag for power generation. The high-temperature steel slag is automatically poured into a crushing bed through a slag pouring machine, and meanwhile, circulating cold air is introduced into the bottom of the crushing bed to cool the high-temperature liquid steel slag and convert the high-temperature liquid steel slag into a solidified state. The crushing roller rotates at a certain speed, and can crush the steel slag and realize the slag pushing function at the same time. Set up a plurality of crushing rollers in the revolving bed, the broken ability of system equipment is high, has increased substantially slag treatment efficiency, and the crushing process adopts the forced air cooling heat transfer to obtain the high temperature flue gas simultaneously and can carry out waste heat recovery electricity generation. The process equipment can realize 10-30kWh of power generation per ton of slag, has remarkable economic benefit of waste heat recovery, and has the advantages of high automation level of equipment, strong production continuity, high operation efficiency, small space occupation, low system investment, high waste heat recovery rate and the like.
Meanwhile, the invention cancels a steel slag water cooling system device, adopts a simple dry dedusting mode to replace a wet flue gas treatment system caused by the prior water cooling process, and has the advantages of high automation degree, high waste heat recovery utilization rate, high treatment efficiency, good tightness, small space occupation, low system investment, no flue gas discharge in hot air recycling and the like. The method and the device greatly improve the steel slag treatment equipment level, improve the steel slag treatment efficiency, break through the difficult problem of steel slag waste heat recycling, thoroughly solve the difficult problem of steel slag treatment process discharge, increase the comprehensive utilization benefit of the steel slag, greatly reduce public and auxiliary facility investment such as water and dust removal and effectively reduce the steel slag production operation cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is an overall schematic view of a device for recovering waste heat from crushing of a high-temperature steel slag revolving bed according to the present invention;
FIG. 2 is a schematic top view of a device for recovering waste heat from crushing of a high-temperature steel slag revolving bed according to the present invention;
FIG. 3 is a schematic cross-sectional view of a device for recovering waste heat from crushing of a high-temperature steel slag revolving bed according to the present invention;
FIG. 4 is a schematic cross-sectional view of a steel slag rotary bed bottom bed of the device for recovering the crushing waste heat of the high-temperature steel slag rotary bed provided by the invention;
FIG. 5 is a schematic top view of a steel slag rotary bed bottom bed of the device for recovering the crushing waste heat of the high-temperature steel slag rotary bed provided by the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Fig. 1 to 5 show a device and a method for recycling waste heat generated by crushing a high-temperature steel slag rotating bed according to an embodiment of the present invention, and as shown in the drawings, according to an embodiment of the present invention, there is provided a device for recycling waste heat generated by crushing a high-temperature steel slag rotating bed, including: the device comprises a liquid slag tank 1, a slag pouring machine 2, high-temperature slag 3, a slag pouring opening 4, a rotating bed 5, a slag pulling machine 6, a circulating fan 7, an air pipe 8, a heat exchanger 9, a steam pipe 10, a generator 11, a slag discharging opening 12, broken slag 13, a solid slag tank 14 and a diffusing cylinder 15.
The liquid slag pot 1 is seated on the slag pouring machine 2; the high-temperature slag 3 is filled in the liquid slag tank 1; the slag pouring port 4 is arranged above the rotating bed 5 and below the liquid slag pot 1; the slag extractor 6 is arranged above the slag pouring port 4; the circulating fan 7 is connected with the rotating bed 5 and the heat exchanger 9 through an air pipe 8, and the heat exchanger 9 is connected with the generator 11 through a steam pipe 9; the slag discharging port 12 is arranged on the side wall of the rotating bed 5; the crushed slag 13 is loaded into a solid slag tank 14 through a slag discharge port 12; the diffusing cylinder 15 is arranged at the upper part of the rotating bed 5 and is used for releasing high-pressure gas in the rotating bed 5.
The rotating bed 5 comprises a slag pouring port 4, a slag discharging port 12, a diffusing cylinder 15, a closed cover 16, a crushing roller 17, a discharging roller 18, a material baffle plate 19, a rotating ring 20, a rotating wheel 21, a cushion layer 22, a material layer 23, a bottom bed 24, an air box 25, an ash bucket 26, an ash cleaning vehicle 27, a track 28 and a grate bar 29.
The slag pouring port 4 and the diffusing cylinder 15 are arranged above the top of the closed cover 16, and the slag discharging port 12 is arranged at the side part of the closed cover 16; the crushing roller 17 and the discharging roller 18 are arranged above the bottom bed 24 and below the closed cover 16; the striker plate 19 is arranged on the side part of the discharge roller 18; the cushion layer 22 is arranged above the bottom bed 24 and below the material layer 23; the rotating ring 20 is connected with a rotating wheel 21 at the outer side of the bottom bed 24; the wind box 25 is arranged below the bottom bed 24, the ash hopper 26 is arranged below the wind box 25, the ash cleaning vehicle 27 is arranged below the ash hopper 26, and the track 28 is arranged below the ash cleaning vehicle 27; the grate bar 29 is in the middle of the bottom bed 24.
The inner diameter of the slag pouring port 4 is 1000-2000mm, the slag pouring port 4 is of a steel structure, a refractory material is arranged inside the slag pouring port and laid on the steel structure, and the thickness of the refractory material is 50-200 mm. The inner diameter of the slag discharge port 12 is 500-1200 mm. The slag discharging port 12 is of a steel structure, an inorganic heat-insulating material is arranged outside the slag discharging port, and the thickness of the heat-insulating material is 50-150 mm. The diameter of the crushing roller 17 is 1000-2500mm, high-temperature resistant steel materials are adopted as manufacturing materials, and the width of the roller teeth is 50-300 mm.
The crushing roller 17 can rotate in the positive and negative directions through a motor of the driving device, the steel slag can be pushed to move towards the slag discharging port 12 by the rotation of the positive direction of the motor, and the steel slag can be pushed to move towards the slag pouring port 4 by the rotation of the reverse direction. The number of the crushing rollers 17 in the rotating bed 5 is set to be 2-6 and evenly distributed. The discharge roller 18 is of a spiral discharge structure, the diameter is 1000-2500mm, high-temperature-resistant steel is adopted as a manufacturing material, and the width of the roller teeth is 50-300 mm.
The discharging roller 18 realizes the rotation in the positive direction through a motor of the driving device and can push the steel slag to move towards the slag discharging opening 12. The striker plate 19 is a steel structure baffle plate, the thickness is 100 and 200mm, the bottom of the striker plate 19 is arranged between the cushion layer 22 and the material layer 23, and the material layer 23 of steel slag can be blocked, so that the discharge roller 18 can push the steel slag to the slag discharge opening 12 for discharging.
The rotating ring 20 drives the bottom bed 24 to rotate, the rotating wheel 21 drives the rotating ring 20 to rotate under the driving of the motor, the rotation in the positive and negative directions is realized through the driving device motor of the rotating wheel 21, the positive rotation of the motor can drive the bottom bed 24 to move towards the slag discharging opening 12, and the negative rotation can drive the bottom bed 24 to move towards the slag pouring opening 4.
The cushion layer 22 is made of large-particle steel slag, the mass percentage of the steel slag particle size of 10-50mm is more than 90%, and the thickness of the cushion layer 22 is 50-500 mm. The thickness of the material layer 23 is 200-600 mm. The ash bucket 23 is used for collecting steel slag particles falling from the middle of the grate bar 29 below the bottom bed 24.
The circulating fan 7 is a high-temperature resistant fan, and the wind temperature can be resistant to not less than 180 ℃. The grate bars 29 are made of high-temperature-resistant steel materials, the interval distance between the grate bars 29 in the bottom bed 24 is 3-20mm, inorganic heat-insulating materials are arranged outside the air pipe 8, the heat exchanger 9 and the steam pipe 10 for heat insulation and are 50-150mm thick, and the inorganic heat-insulating materials are arranged inside and outside the closed cover 16 for heat insulation and are 50-150mm thick. The main body of the rotating bed 5 is annular, and the circulating fan 7 is preferentially arranged in the inner ring of the rotating bed 5.
According to another embodiment of the present invention, another method for recycling waste heat generated by bottom-rotating crushing of high temperature steel slag is provided, which comprises the following steps:
(1) the liquid slag pot 1 containing the high-temperature slag 3 is lifted and placed on the slag pouring machine 2 through a travelling crane, the slag pouring machine 2 tips over the steel slag at a certain speed to pour the steel slag to a slag pouring port 4 at the upper part of the rotating bed 5, and the high-temperature slag 3 falls on the upper part of a cushion layer 22 on a bottom bed 24 to form a material layer 23.
(2) While pouring the slag, the bottom bed 24 drives the rotating ring 20 to rotate on the rotating wheel 21, and drives the high-temperature steel slag layer 23 to move towards the slag discharging opening 12. The material layer 23 is continuously crushed under the rotation and the stirring of the crushing roller 17 in the moving process until the requirement of the crushing granularity is met.
(3) In the treatment process, cold air provided by the circulating fan 7 sequentially passes through the air box 25, the grate bars 29 in the bottom bed 24, the cushion layer 22 and the material layer 23 to realize the heat convection of the high-temperature material layer 23 until the high-temperature steel slag is cooled to a certain temperature.
(4) The high-temperature material layer 23 is cooled and crushed to form crushed slag 13 after rotating for one circle through the rotating bed 5, the material layer 23 is piled up and raised under the action of the material baffle plate 19, and the raised crushed slag 13 moves to the slag discharging port 12 under the rotary pushing of the discharging roller 18 and falls into the solid slag tank 14 for subsequent hot stuffy treatment of the steel slag.
(5) The convection heat exchange between the cold air and the high-temperature material layer 22 is converted into hot air, the hot air enters the heat exchanger 9 through the air pipe 8 to obtain pressure steam, and the steam is conveyed to the generator 11 through the steam pipe 10 to generate electricity. The hot air is cooled by a heat exchanger 9 to obtain cold air, and the cold air is recycled by a circulating fan 7 to cool the high-temperature slag 3.
Wherein, the slag pouring time of a single liquid slag pot 1 is 10-60 minutes, and the crushing time is 10-60 minutes. The rotating speed of the crushing roller 17 is 3-30 r/min, and the steel slag treatment speed can be increased by increasing the rotating speed of the crushing roller 17, otherwise, the steel slag treatment speed is reduced. The crushed slag 13 obtained by crushing the high-temperature slag 3 has a particle size less than 200mm, and the steel slag has a particle size more than 80%. The rotating speed of the discharging roller 18 is 3-30 r/min, and the steel slag discharging speed can be improved by adjusting the rotating speed of the discharging roller 18.
Specifically, the cooling air volume of the high-temperature slag 3 is 1000-3And h, the temperature of the crushed slag 13 at the slag discharging port 12 can be reduced by increasing the air quantity of the circulating fan 7, otherwise, the temperature of the crushed slag 13 is increased. The temperature of the broken slag 13 at the slag discharge port 12 is controlled to be 400-1000 ℃, so that the cooling, solidification and breaking of the steel slag can be realized, and certain heat can be reserved for subsequent hot stuffiness.
Wherein, the temperature of the cooling air provided by the circulating fan 7 is 200 ℃ and the temperature of the hot air is 600 ℃ when the material layer 22 formed by the high-temperature slag 3 is converted into the temperature of the hot air by convection heat exchange. The hot air is cooled to below 200 ℃ by a heat exchanger 9, and then the high-temperature slag 3 is circularly cooled by a circulating fan 7. The saturated water vapor obtained by the heat exchange of the hot air through the heat exchanger 9 generates electricity, and the generating capacity of each ton of steel slag is 10-30 kWh.
And under the condition that solidification phenomena such as incrustation and the like of the high-temperature slag 3 in the liquid slag tank 1 affect the difficulty in uniform slag pouring, the slag pouring machine 2 is adopted to carry out slag pouring operation, and the solidified high-temperature slag 3 is uniformly poured into the slag pouring opening 4. Wherein, the fine-grained steel slag collected by the ash bucket 23 needs to be removed and transported out by an ash removal vehicle 27 regularly, and is generally cleaned once in 1-3 days.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (16)
1. The utility model provides a broken waste heat recovery device of high temperature slag revolving bed, includes liquid slag ladle (1), slag pouring machine (2), revolving bed (5), pulls out sediment machine (6), circulating fan (7), tuber pipe (8), heat exchanger (9), steam pipe (10), generator (11), solid-state slag ladle (14), its characterized in that: the liquid slag pot (1) can be toppled and established on the sediment machine (2) of falling, and revolving bed (5) top is equipped with pulls out sediment machine (6), and revolving fan (7) are through tuber pipe (8) connection revolving bed (5), heat exchanger (9), and generator (11) are connected through steam pipe (9) in heat exchanger (9), revolving bed (5) pivoted is established between sediment machine (2) and circulating fan (7) of falling, and the slag is arranged through revolving bed (5) cooling.
2. The device for recovering the crushing waste heat of the high-temperature steel slag rotating bed according to the claim 1, wherein the high-temperature slag (3) in the liquid slag tank (1) is processed into crushed slag (13) through the rotating bed (5), the crushed slag (13) is loaded into the solid slag tank (14) through the slag discharge port (12), the main body of the rotating bed (5) is ring-shaped, and the circulating fan (7) is arranged in the inner ring of the rotating bed (5).
3. The high-temperature steel slag rotary bed crushing waste heat recovery device according to claim 1, wherein the rotary bed (5) comprises a slag pouring port (4), a slag discharging port (12), a diffusing cylinder (15), a closed cover (16), a crushing roller (17), a discharging roller (18), a striker plate (19), a swivel (20), a rotating wheel (21), a cushion layer (22), a material layer (23), a bottom bed (24), an air box (25), an ash hopper (26), an ash cleaning vehicle (27), a rail (28) and a grate bar (29), the bottom bed (24) is rotatably arranged between a main body at the lower part of the rotary bed (5) and the closed cover (16) at the upper part, the air box (25), the ash hopper (26), the ash cleaning vehicle (27) and the rail (28) at the lower part of the bottom bed (24) are fixedly connected to the main body of the rotary bed (5) from top to bottom in sequence, and a circulating fan (7) is connected with the air box (, the heat exchanger (9) is connected with the closed cover (16) through an air pipe (8).
4. The recycling device of the crushing waste heat of the high-temperature steel slag revolving bed according to claim 3, characterized in that, the slag pouring port (4) is arranged on the closed cover (16) corresponding to the liquid slag tank (1), the diffusing cylinder (15) penetrates through the closed cover (16), the side wall of the closed cover (16) is provided with the slag discharging port (12), the crushing roller (17) and the discharging roller (18) are arranged on the upper portion of a bottom bed (24) in the closed cover (16) in a rotatable mode along the radial direction, the material baffle plate (19) is arranged between the projection positions of the slag pouring port (4) and the slag discharging port (12), a cushion layer (22) is arranged between the bottom bed (24) and the material layer (23), the outer side of the bottom bed (24) is provided with a rotating ring (20), the rotating ring (20) is meshed with and connected with a rotating wheel (21), the bottom bed (24) is provided with a grate bar (29) corresponding to the position of the air box (25), and the driving rotation direction of the rotating wheel (21.
5. The device for recovering the crushing waste heat of the high-temperature steel slag rotating bed according to claim 4, wherein the inner diameter of the slag pouring port (4) is 1000-2000mm, the inner diameter of the slag discharging port (12) is 500-1200mm, a steel structure in the slag pouring port (4) is provided with a refractory material with the thickness of 50-200mm, the outer part of the slag discharging port (12) is provided with an inorganic heat-insulating material with the thickness of 50-150mm, the outer parts of the air duct (8), the heat exchanger (9) and the steam pipe (10) are provided with inorganic heat-insulating materials with the thickness of 50-150mm, and the inner part and the outer part of the closed cover (16) are provided with inorganic heat-insulating materials with the thickness of 50-150 mm.
6. The device for recycling the crushing waste heat of the high-temperature steel slag rotating bed according to claim 4, wherein the crushing roller (17) rotates in forward and reverse directions through a motor of a driving device, the forward rotation pushes the steel slag to move towards the slag discharging opening (12), the reverse rotation pushes the steel slag to move towards the slag pouring opening (4), the discharging roller (18) is of a spiral discharging structure, and the discharging roller (18) rotates to push the steel slag to move towards the slag discharging opening (12).
7. The device for recycling the crushing waste heat of the high-temperature steel slag rotating bed according to claim 4, wherein the rotating wheel (21) drives the rotating ring (20) to drive the bottom bed (24) to rotate, the rotating wheel (21) realizes rotation in forward and reverse directions through a motor of the driving device, the forward rotation drives the bottom bed (24) to move towards the slag discharge port (12), and the reverse rotation drives the bottom bed (24) to move towards the slag discharge port (4).
8. The device for recycling the crushing waste heat of the high-temperature steel slag rotating bed according to claim 4, wherein the bottom of the striker plate (19) is arranged between the cushion layer (22) and the material layer (23), the striker plate (19) blocks the material layer (23) of the steel slag, and the discharging roller (18) pushes the steel slag to discharge to the slag discharging port (12).
9. The device for recovering the crushing waste heat of the high-temperature steel slag rotating bed as claimed in claim 4, wherein the diameters of the crushing roller (17) and the discharging roller (18) are 1000-2500mm, the width of the roller teeth is 50-300mm, 2-6 crushing rollers (17) are uniformly distributed in the rotating bed (5), the material baffle plate (19) is a steel structure baffle plate, and the thickness is 100-200 mm.
10. The device for recycling the crushing waste heat of the high-temperature steel slag rotating bed as claimed in claim 3, wherein the cushion layer (22) is made of large-particle steel slag, the particle size of the steel slag is 10-50mm, the mass percentage of the steel slag is more than 90%, the thickness of the cushion layer (22) is 50-500mm, and the thickness of the material layer (23) is 200-600 mm.
11. A method for recovering waste heat generated by crushing a high-temperature steel slag rotary bed, which adopts the device for recovering waste heat generated by crushing the high-temperature steel slag rotary bed as claimed in any one of claims 1 to 10 to recover the waste heat, is characterized by comprising the following steps:
s1, a liquid slag tank (1) containing high-temperature slag (3) is lifted and placed on a slag pouring machine (2) through a travelling crane, the slag pouring machine (2) tips over the slag to pour the steel slag to a slag pouring port (4) at the upper part of a rotating bed (5) at a certain speed, and the high-temperature slag (3) falls on the upper part of a cushion layer (22) on a bottom bed (24) to form a material layer (23);
s2, while pouring slag, the bottom bed (24) drives the rotating ring (20) to rotate through the rotating wheel (21) to drive the high-temperature steel slag layer (23) to move towards the slag discharging opening (12), and the material layer (23) is continuously crushed through the rotary stirring of the crushing roller (17) in the moving process until the requirement of crushing granularity is met;
s3, in the treatment process, cold air provided by the circulating fan (7) sequentially passes through the air box (25), the grate bars (29) in the bottom bed (24), the cushion layer (22) and the material layer (23) to realize convective heat exchange on the high-temperature material layer (23) until the high-temperature steel slag is cooled to a certain temperature;
s4, the high-temperature material layer (23) rotates for a circle through the rotating bed (5) and is cooled and crushed to form broken slag (13), the broken slag (13) is piled up and raised under the action of the material baffle plate (19), the raised broken slag (13) moves to a slag discharging port (12) under the rotating pushing of a discharging roller (18) and falls into a solid slag tank (14) for subsequent steel slag hot stuffy treatment;
s5, converting convection heat exchange between the cold air and the high-temperature material layer (22) into hot air, enabling the hot air to enter a heat exchanger (9) through an air pipe (8) to obtain pressure steam, conveying the steam to a generator (11) through a steam pipe (10) to generate electricity, cooling the hot air through the heat exchanger (9) to obtain cold air, and recycling the cold air through a circulating fan (7) to cool the high-temperature slag (3).
12. The method for recycling the crushing waste heat of the high-temperature steel slag rotating bed according to claim 11, wherein in the steps S1 to S5, the deslagging time of a single liquid slag tank (1) is 10-60 minutes, the crushing treatment time is 10-60 minutes, the rotating speed of a crushing roller (17) is 3-30 r/min, the steel slag with the particle size of the crushed slag (13) of 200mm obtained by crushing the high-temperature slag (3) exceeds 80%, and the rotating speed of a discharging roller (18) is 3-30 r/min.
13. The method for recycling the crushing waste heat of the high-temperature steel slag rotating bed as claimed in claim 11, wherein in the steps S1 to S5, the cooling air volume of the high-temperature slag (3) is 1000-4000m3/h, and the temperature of the crushed slag (13) at the slag discharge port (12) is controlled at 400-1000 ℃.
14. The method for recycling the crushing waste heat of the high-temperature steel slag rotating bed according to claim 11, wherein in the steps S1 to S5, the temperature of cooling air provided by the circulating fan (7) is 200-.
15. The method for recycling the crushing waste heat of the high-temperature steel slag rotating bed according to claim 11, wherein in the step S1, under the condition that solidification phenomena such as incrustation and the like of the high-temperature slag (3) in the liquid slag tank (1) affect the difficulty in uniform slag pouring, the slag pouring machine (2) is adopted to perform slag pouring operation, and the solidified high-temperature slag (3) is uniformly poured into the slag pouring port (4).
16. The method for recycling the crushing waste heat of the high-temperature steel slag rotating bed according to claim 11, further comprising a step S6 of collecting fine-grained steel slag by an ash bucket (23) at the lower part of the wind box (25) and periodically cleaning and transporting the steel slag by an ash cleaning vehicle (27), wherein the cleaning cycle is 1-3 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110297684.6A CN113061673A (en) | 2021-03-19 | 2021-03-19 | Device and method for recycling crushing waste heat of high-temperature steel slag rotating bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110297684.6A CN113061673A (en) | 2021-03-19 | 2021-03-19 | Device and method for recycling crushing waste heat of high-temperature steel slag rotating bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113061673A true CN113061673A (en) | 2021-07-02 |
Family
ID=76562523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110297684.6A Pending CN113061673A (en) | 2021-03-19 | 2021-03-19 | Device and method for recycling crushing waste heat of high-temperature steel slag rotating bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113061673A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916015A (en) * | 2021-10-13 | 2022-01-11 | 唐山市宝凯科技有限公司 | Hot-melting steel slag treatment method and waste heat utilization device |
| CN114045368A (en) * | 2021-12-28 | 2022-02-15 | 北京天朗致达节能环保股份有限公司朝阳分公司 | Steel slag continuous hot braising system and treatment method thereof |
| CN114085935A (en) * | 2021-12-28 | 2022-02-25 | 北京天朗致达节能环保股份有限公司朝阳分公司 | Short-process thermal-state steel slag treatment system and use method thereof |
| CN114891934A (en) * | 2022-04-29 | 2022-08-12 | 刘春茗 | Steel slag roller type crushing, air quenching and cooling dry processing device and working method thereof |
| CN115627304A (en) * | 2022-10-26 | 2023-01-20 | 中冶节能环保有限责任公司 | Efficient wind-crushing waste heat recovery method and device for molten electric furnace slag |
| CN114045368B (en) * | 2021-12-28 | 2024-04-26 | 北京天朗致达节能环保股份有限公司朝阳分公司 | Continuous steel slag heat stewing system and treatment method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880737A (en) * | 2010-06-02 | 2010-11-10 | 首钢总公司 | System and method for recovering waste heat of continuous hot steel slag |
| CN105018659A (en) * | 2015-07-08 | 2015-11-04 | 北京中冶设备研究设计总院有限公司 | Method and device for secondary cooling after granulating slag by dry method |
| WO2017152782A1 (en) * | 2016-03-11 | 2017-09-14 | 西安交通大学 | High-temperature liquid slag granulation and exhaust heat recovery device |
| CN111518971A (en) * | 2020-06-30 | 2020-08-11 | 河北思莱格环境科技有限公司 | High-temperature metallurgical slag environment cleaning, heat taking and dry processing system and process |
| CN212426080U (en) * | 2020-08-04 | 2021-01-29 | 中冶节能环保有限责任公司 | Broken waste heat recovery device of forced air cooling is blown at bottom to high temperature slag |
| CN214572066U (en) * | 2021-03-19 | 2021-11-02 | 中冶节能环保有限责任公司 | Broken waste heat recovery device of high temperature slag revolving bed |
-
2021
- 2021-03-19 CN CN202110297684.6A patent/CN113061673A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880737A (en) * | 2010-06-02 | 2010-11-10 | 首钢总公司 | System and method for recovering waste heat of continuous hot steel slag |
| CN105018659A (en) * | 2015-07-08 | 2015-11-04 | 北京中冶设备研究设计总院有限公司 | Method and device for secondary cooling after granulating slag by dry method |
| WO2017152782A1 (en) * | 2016-03-11 | 2017-09-14 | 西安交通大学 | High-temperature liquid slag granulation and exhaust heat recovery device |
| CN111518971A (en) * | 2020-06-30 | 2020-08-11 | 河北思莱格环境科技有限公司 | High-temperature metallurgical slag environment cleaning, heat taking and dry processing system and process |
| CN212426080U (en) * | 2020-08-04 | 2021-01-29 | 中冶节能环保有限责任公司 | Broken waste heat recovery device of forced air cooling is blown at bottom to high temperature slag |
| CN214572066U (en) * | 2021-03-19 | 2021-11-02 | 中冶节能环保有限责任公司 | Broken waste heat recovery device of high temperature slag revolving bed |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916015A (en) * | 2021-10-13 | 2022-01-11 | 唐山市宝凯科技有限公司 | Hot-melting steel slag treatment method and waste heat utilization device |
| CN114045368A (en) * | 2021-12-28 | 2022-02-15 | 北京天朗致达节能环保股份有限公司朝阳分公司 | Steel slag continuous hot braising system and treatment method thereof |
| CN114085935A (en) * | 2021-12-28 | 2022-02-25 | 北京天朗致达节能环保股份有限公司朝阳分公司 | Short-process thermal-state steel slag treatment system and use method thereof |
| CN114045368B (en) * | 2021-12-28 | 2024-04-26 | 北京天朗致达节能环保股份有限公司朝阳分公司 | Continuous steel slag heat stewing system and treatment method thereof |
| CN114891934A (en) * | 2022-04-29 | 2022-08-12 | 刘春茗 | Steel slag roller type crushing, air quenching and cooling dry processing device and working method thereof |
| CN115627304A (en) * | 2022-10-26 | 2023-01-20 | 中冶节能环保有限责任公司 | Efficient wind-crushing waste heat recovery method and device for molten electric furnace slag |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113061673A (en) | Device and method for recycling crushing waste heat of high-temperature steel slag rotating bed | |
| CN111850194A (en) | High-temperature steel slag bottom blowing air cooling crushing waste heat recovery device and method | |
| CN104988255B (en) | A kind of liquid slag waste heat recovery and the method and apparatus system of tailings ultra micro efflorescence | |
| CN112958246B (en) | High-temperature steel slag disc crushing waste heat recovery device and method | |
| CN101660014A (en) | Molten blast furnace slag sensible heat recovery method and device | |
| CN109811095B (en) | Heat accumulating type stainless steel slag waste heat recovery device and method | |
| CN103540698B (en) | Steel slag granulating and afterheat recycling device | |
| CN212426080U (en) | Broken waste heat recovery device of forced air cooling is blown at bottom to high temperature slag | |
| CN210117386U (en) | Steel slag thermal crushing and waste heat recovery device | |
| CN111271978A (en) | High-temperature slag waste heat recovery system | |
| CN115615188B (en) | Oxygen-enriched double-chamber molten pool smelting side-blown furnace and method for extracting iron and quenching molten steel slag | |
| CN101880737A (en) | System and method for recovering waste heat of continuous hot steel slag | |
| CN214572066U (en) | Broken waste heat recovery device of high temperature slag revolving bed | |
| CN102277463B (en) | Reduction furnace and device for producing direct reduced iron | |
| CN104988256B (en) | Furnace slag waste heat recovery system | |
| CN215612141U (en) | Broken waste heat recovery device of high temperature slag disc | |
| CN112899418A (en) | Vertical cooling heat exchange power generation device and method for molten steel slag | |
| CN1081312C (en) | Method for recovering waste heat from scoria | |
| CN214717005U (en) | Molten steel slag disc type air-cooling double-rotating-roller crushing treatment device | |
| CN107190110A (en) | A kind of high-temperature slag dry colling granulation residual neat recovering system and method | |
| CN112934361B (en) | Molten steel slag disc type air-cooled double-rotating-roller crushing treatment device and method | |
| CN216947078U (en) | Short-flow thermal state steel slag treatment system | |
| CN203559060U (en) | Steel slag granulating device | |
| CN214666098U (en) | Closed full-dry type non-emission waste heat recovery smelting slag treatment system | |
| CN212378525U (en) | High-temperature slag waste heat recovery system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |