CN115505657A - High-temperature steel slag efficient cooling heat exchange method and grate type air cooling bed - Google Patents
High-temperature steel slag efficient cooling heat exchange method and grate type air cooling bed Download PDFInfo
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- CN115505657A CN115505657A CN202211314933.9A CN202211314933A CN115505657A CN 115505657 A CN115505657 A CN 115505657A CN 202211314933 A CN202211314933 A CN 202211314933A CN 115505657 A CN115505657 A CN 115505657A
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- 238000001816 cooling Methods 0.000 title claims abstract description 229
- 239000002893 slag Substances 0.000 title claims abstract description 162
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 149
- 239000010959 steel Substances 0.000 title claims abstract description 149
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000007599 discharging Methods 0.000 claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 14
- 239000002918 waste heat Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 38
- 238000005192 partition Methods 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 7
- 238000011084 recovery Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 description 13
- 239000011810 insulating material Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000007885 magnetic separation Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- 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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
- F27D15/0206—Cooling with means to convey the charge
- F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
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- 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-efficiency cooling and heat exchange method for high-temperature steel slag and a grate type air cooling bed, wherein the method comprises the following steps: s1, flattening and feeding steel slag, transferring the steel slag in a certain high-temperature state to a fixed grate cooling bed through a slag tank, stirring, crushing and flattening the steel slag by adopting a flattening crushing roller, and uniformly arranging the steel slag on the fixed grate cooling bed according to a certain thickness; s2, cooling and crushing the steel slag, namely, sequentially adopting a fixed grate cooling bed and a movable grate cooling bed to carry out multistage cooling and crushing on the steel slag; and S3, cooling and discharging the steel slag, wherein the steel slag is gradually moved from the starting point of the movable grate cooling bed to the slag discharging groove at a certain speed in the cooling process of the steel slag under the certain reciprocating pushing action of the electro-hydraulic push rod to finish cooling and discharging. The method and the device of the invention provide a stable and reliable steel slag cooling and crushing and waste heat recovery process, and have the advantages of high automation level, good system tightness, small space occupation, low system cost and high waste heat recovery rate.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a high-temperature steel slag efficient cooling heat exchange method and a grate type air cooling bed.
Background
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 disadvantages of backward production mode, simple and extensive treatment process, serious environmental pollution, low metal resource recovery rate and the like, and needs 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 percent, and the equipment operation cost is high, so the failure is high; the air quenching method adopts large air volume to blow off and cool the liquid steel slag into fine particles, is only suitable for the treatment of the liquid steel slag, and has low recovery rate of steel metal iron resources and less domestic application.
The main domestic steel slag treatment method is a hot stuffy method, the current hot stuffy method is divided into a tank type hot stuffy process and a pressure hot stuffy process, the tank type hot stuffy method adopts a process method of engineering mechanical operation, namely, an excavator is used for removing and crushing high-temperature steel slag poured into a hot stuffy tank, the equipment level and the environment discharge need to be further improved, and the pressure hot stuffy mode adopts a mechanical rolling crusher for crushing the high-temperature steel slag, so that the method has the advantages of equipment, high automation degree and the like, but the investment is relatively high, the tightness is poor, and the waste heat recovery cannot be carried out in the crushing process by adopting a water cooling mode.
Disclosure of Invention
In order to solve the prior technical problems, the invention provides a high-efficiency cooling and heat exchange method for high-temperature steel slag and a grate type air cooling bed.
The above purpose is realized by the following scheme:
a high-efficiency cooling heat exchange method for high-temperature steel slag comprises the following steps:
s1, flattening and feeding steel slag, transferring the steel slag in a certain high-temperature state to a fixed grate cooling bed through a slag tank, stirring and crushing the steel slag by adopting a flattening crushing roller, and flattening to ensure that the steel slag is uniformly distributed on the fixed grate cooling bed according to a certain thickness;
s2, cooling and crushing the steel slag, namely, sequentially adopting a fixed grate cooling bed and a movable grate cooling bed to carry out multistage cooling and crushing on the steel slag;
and S3, cooling and discharging the steel slag, wherein the steel slag gradually moves from the starting point of the movable grate cooling bed to the slag discharging groove at a certain speed in the cooling process of the steel slag to finish cooling and discharging under the certain reciprocating pushing action of the electro-hydraulic push rod.
Further, in the step S2, the cooling and crushing by using the fixed grate cooling bed includes blowing air into the air chamber of the fixed bed by using a fixed bed fan according to a certain operation pressure, wherein the blown air passes through the fixed grate cooling bed to cool and solidify the high-temperature steel slag, and stirring and crushing the high-temperature steel slag on the fixed grate cooling bed by using a flattening crushing roller while cooling the high-temperature steel slag to promote cooling and crushing of the steel slag.
Further, in the step S2, the cooling and crushing by the movable grate cooling bed includes that the high-temperature steel slag is cooled to a certain temperature and crushed to a certain granularity on the fixed grate cooling bed for a certain time, and the cooled, solidified and crushed steel slag is pushed to the movable grate cooling bed from the fixed grate cooling bed by the flattening crushing roller.
Further, in the step S2, the cooling and crushing by using the movable grate cooling bed further comprises the steps of starting the high-temperature fan and the low-temperature fan to respectively blow cooling air into the high-temperature air chamber and the low-temperature air chamber, and cooling the high-temperature steel slag on the movable grate cooling bed through the movable grate cooling bed.
Further, in the step S2, the multistage cooling and crushing of the steel slag further comprises a fixed bed fan, wherein cold air blown by the high temperature fan exchanges heat with the steel slag at a higher temperature to obtain high temperature hot air at a certain temperature, and the high temperature hot air is collected in a concentrated manner by the fixed bed closed cover and the high temperature closed cover respectively and then is conveyed to waste heat utilization by the exhaust pipe; the cold air blown by the low-temperature fan exchanges heat with the steel slag with lower temperature to obtain low-temperature hot air with certain temperature, and the low-temperature hot air is collected in a concentrated manner by the low-temperature closed cover and then is conveyed to the high-temperature fan through the exhaust pipe to provide cooling air for the high-temperature fan.
Further, in the step S3, in the reciprocating pushing process of the electro-hydraulic push rod, firstly, the odd-numbered grate plates and the even-numbered grate plates simultaneously move towards the slag discharging groove for one stroke, then the odd-numbered grate plates or the even-numbered grate plates are alternately withdrawn, and the steel slag falls down into the slag discharging groove at a constant speed when the odd-numbered grate plates or the even-numbered grate plates are withdrawn.
The device comprises a fixed grate cooling bed, a flattening crushing roller, a movable grate cooling bed, a slag discharging groove and an electric hydraulic push rod, wherein the fixed grate cooling bed, the movable grate cooling bed and the slag discharging groove are sequentially connected, the flattening crushing roller is rotatably arranged at the front end of the upper part of the fixed grate cooling bed, the electric hydraulic push rod is arranged at one end part of the bottom side of the movable grate cooling bed, and the slag discharging groove is arranged at the other end part of the movable grate cooling bed.
The fixed grate cooling bed is fixedly provided with the fixed bed airtight cover at the upper part, the fixed bed air chamber and the fixed bed fan are communicated with each other at the lower part, the movable grate cooling bed is fixedly provided with the high-temperature airtight cover and the low-temperature airtight cover at the upper part in sequence, the fixed bed airtight cover is connected with the high-temperature airtight cover, the movable grate cooling bed is provided with the high-temperature fan and the high-temperature air chamber which are communicated with each other at the lower part corresponding to the high-temperature airtight cover, the movable grate cooling bed is provided with the low-temperature fan and the low-temperature air chamber which are communicated with each other at the lower part corresponding to the low-temperature airtight cover, the fixed bed airtight cover and the high-temperature airtight cover are provided with the communicated exhaust pipes at the upper parts, and the low-temperature airtight cover is provided with the independent exhaust pipe at the upper part.
The movable grate cooling bed further comprises grate grooves, cover plates, connecting plates, cushion layers, sealing plates, partition plates, odd grate plates and even grate plates, the cover plates are connected with two adjacent grate plates in a covering mode to form unit grate plates, the cushion layers cover the upper portions of the unit grate plates, the two adjacent unit grate plates are fixedly connected through the connecting plates to form a fixed grate cooling bed, the two adjacent unit grate plates are connected through sliding of the sealing plates in a relatively sealed mode to form the movable grate cooling bed, the partition plates cover the upper portions of the cover plates of the unit grate plates of the movable grate cooling bed, and the two adjacent unit grate plates are the odd grate plates and the even grate plates in sequence.
Furthermore, the electro-hydraulic push rods are linear electro-hydraulic push rods which are pushed and pulled in a reciprocating mode, the stroke is 100-600mm, the stroke frequency is 0-10 times per minute, the electro-hydraulic push rods are installed below the front sections of odd-numbered grate plates and even-numbered grate plates of the movable grate cooling bed to provide power for movement of the grate plates, and each grate plate is provided with an independent electro-hydraulic push rod.
The invention has the beneficial effects that:
the invention utilizes the fixed grate cooling bed and the flattening crushing roller to stir and crush the high-temperature steel slag, promotes the primary cooling and crushing of the steel slag, and the high-temperature steel slag is cooled to a certain temperature and crushed to a certain granularity on the fixed grate cooling bed for a certain time.
Meanwhile, the high-temperature fan and the low-temperature fan are used for blowing cooling air into the high-temperature air chamber and the low-temperature air chamber respectively, and the high-temperature steel slag on the movable grate cooling bed is cooled through the movable grate cooling bed, so that the multi-stage cooling of the high-temperature steel slag is realized; meanwhile, high-temperature hot air exchanges heat with a high-temperature area, low-temperature hot air exchanges heat with low-temperature heat removal, the temperature difference transition is stable, efficient cooling is achieved, and the waste heat recovery effect is greatly improved.
In addition, the fixed grate cooling bed, the movable grate cooling bed and the slag discharging groove are sequentially connected, so that the invention has the technical advantages of high automation degree, high waste heat recovery utilization rate, high treatment efficiency, small space occupation and low system 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 a flow chart of the high-efficiency cooling and heat exchanging method for high-temperature steel slag provided by the invention;
FIG. 2 is a first schematic view of a grate type air-cooled bed for efficiently cooling and exchanging heat of high-temperature steel slag provided by the invention;
FIG. 3 is a second schematic view of a grate type air-cooled bed for efficiently cooling and exchanging heat of high-temperature steel slag provided by the invention;
FIG. 4 is a third schematic view of a grate type air-cooled bed for efficiently cooling and exchanging heat of high-temperature steel slag provided by the invention;
FIG. 5 is a fourth schematic view of the grate type air cooling bed for efficiently cooling and heat exchanging high-temperature steel slag according to the present invention;
fig. 6 is a fifth schematic view of the grate type air cooling bed for efficiently cooling and exchanging heat of high-temperature steel slag provided by the invention.
Description of reference numerals:
the device comprises steel slag 1, a fixed grate cooling bed 2, a flattening crushing roller 3, a fixed bed sealing cover 4, a movable grate cooling bed 5, a high-temperature sealing cover 6, a low-temperature sealing cover 7, a fixed bed air chamber 8, a fixed bed fan 9, a high-temperature fan 10, a high-temperature air chamber 11, a low-temperature fan 12, a low-temperature air chamber 13, a slag discharging groove 14, an exhaust pipe 15, an electric-hydraulic push rod 16, a grate groove 17, a cover plate 18, a connecting plate 19, a cushion layer 20, a sealing plate 21, a partition plate 22, an odd grate plate 23 and an even grate plate 24.
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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, the invention provides a high-efficiency cooling and heat exchanging method for high-temperature steel slag, which comprises the following steps:
step S1, flattening and feeding steel slag, transferring the steel slag 1 in a certain high-temperature state to a fixed grate cooling bed 2 through a slag tank, stirring, crushing and flattening the steel slag 1 by adopting a flattening crushing roller 3, and uniformly arranging the steel slag 1 on the fixed grate cooling bed 2 according to a certain thickness;
s2, cooling and crushing the steel slag, namely sequentially adopting a fixed grate cooling bed 2 and a movable grate cooling bed 5 to carry out multistage cooling and crushing on the steel slag 1;
and S3, cooling and discharging the steel slag, wherein the steel slag 1 gradually moves from the starting point of the movable grate cooling bed 5 to the slag discharging groove 14 at a certain speed in the cooling process to finish cooling and discharging under the certain reciprocating pushing action of the electro-hydraulic push rod 16.
In the step S2, the cooling and crushing by using the fixed grate cooling bed 2 includes blowing air into a fixed bed air chamber 8 by using a fixed bed fan 9 according to a certain operation pressure, wherein the blown air passes through the fixed grate cooling bed 2 to cool and solidify the high-temperature steel slag 1, and when the high-temperature steel slag 1 is cooled, the high-temperature steel slag 1 on the fixed grate cooling bed 2 is stirred and crushed by using a flattening crushing roller 3, so that the cooling and crushing of the steel slag are promoted.
In the step S2, the cooling and crushing by the movable grate cooling bed 5 comprises the steps of cooling the high-temperature steel slag 1 on the fixed grate cooling bed 2 for a certain time to a certain temperature and crushing the steel slag to a certain granularity, and pushing the cooled, solidified and crushed steel slag 1 to the movable grate cooling bed 5 from the fixed grate cooling bed 2 by the flattening crushing roller 3.
In the step S2, the cooling and crushing by using the movable grate cooling bed 5 further comprises the steps of starting the high-temperature fan 10 and the low-temperature fan 12 to respectively blow cooling air into the high-temperature air chamber 11 and the low-temperature air chamber 13, and cooling the high-temperature steel slag 1 on the movable grate cooling bed 5 through the movable grate cooling bed 5.
In the step S2, the multistage cooling and crushing of the steel slag 1 further comprises the steps of respectively exchanging heat between cold air blown by a fixed bed fan 9 and a high temperature fan 10 and the steel slag 1 with a higher temperature to obtain high temperature hot air with a certain temperature, and the high temperature hot air is respectively collected in a centralized manner by a fixed bed closed cover 4 and a high temperature closed cover 6 and then is conveyed to waste heat utilization by an exhaust pipe 15; the cold air blown by the low-temperature fan 12 exchanges heat with the steel slag 1 with lower temperature to obtain low-temperature hot air with certain temperature, and the low-temperature hot air is collected in a concentrated manner by the low-temperature closed cover 7 and then is conveyed to the high-temperature fan 10 through the exhaust pipe 15 to provide cooling air for the high-temperature fan 10.
In the step S3, in the reciprocating pushing process of the electro-hydraulic push rod 16, firstly, the odd-numbered grate plates 23 and the even-numbered grate plates 24 simultaneously advance to the slag discharging groove 14 for one stroke, then the odd-numbered grate plates 23 or the even-numbered grate plates 24 are simultaneously and alternately withdrawn, and the steel slag 1 falls into the slag discharging groove 14 at a constant speed when the odd-numbered grate plates 23 or the even-numbered grate plates 24 are withdrawn.
Wherein the temperature of the supplied steel slag 1 is 800-1700 ℃, and the steel slag 1 can be liquid, semisolid or solid. The thickness of a material layer of the steel slag 1 cooled by being spread on the fixed grate cooling bed 2 and the movable grate cooling bed 5 is 100-800mm.
Wherein, the average particle size of the steel slag 1 after being stirred and crushed by the flattening crushing roller 3 is 10-40mm. The temperature of the steel slag 1 cooled by the fixed grate cooling bed 2 is 600-1200 ℃, and more than 90 percent of the steel slag is solid and meets the requirement of entering the movable grate cooling bed 5.
Wherein, the cooling air used by the fixed bed fan 9 and the low temperature fan 12 is normal temperature air. The air used by the high-temperature fan 10 is normal-temperature air and low-temperature hot air collected by the low-temperature closed cover 7. The working pressure of the fixed bed fan 9 is 3-8KPa, and the working pressure of the high temperature fan 10 and the low temperature fan 12 is 5-12KPa.
Wherein the processing time of the high-temperature steel slag 1 on the fixed grate cooling bed 2 and the movable grate cooling bed 5 is 30-60 minutes, and the temperature of the steel slag 1 discharged through the slag discharging groove 14 is adjustable at 60-400 ℃.
Wherein the temperature of the high-temperature hot air collected by the fixed bed sealing cover 4 and the high-temperature sealing cover 6 is 300-600 ℃, and the temperature of the hot air collected by the low-temperature sealing cover 7 is 100-300 ℃. The air volume for cooling the ton steel slag 1 is 1000-3000Nm3, and the recovery rate of the waste heat of the steel slag 1 is 50-80%.
The invention also provides a high-temperature steel slag efficient cooling and heat exchange grate type air cooling bed which comprises a fixed grate cooling bed 2, a flattening crushing roller 3, a movable grate cooling bed 5, a slag discharging groove 14 and an electric hydraulic push rod 16, wherein the fixed grate cooling bed 2, the movable grate cooling bed 5 and the slag discharging groove 14 are sequentially connected, the flattening crushing roller 3 is rotatably arranged at the front end of the upper part of the fixed grate cooling bed 2, the electric hydraulic push rod 16 is arranged at one end part of the bottom side of the movable grate cooling bed 5, and the slag discharging groove 14 is arranged at the other end part of the movable grate cooling bed 5.
The high-temperature steel slag efficient cooling and heat exchange grate type air cooling bed further comprises a fixed bed sealing cover 4, a high-temperature sealing cover 6, a low-temperature sealing cover 7, a fixed bed air chamber 8, a fixed bed fan 9, a high-temperature fan 10, a high-temperature air chamber 11, a low-temperature fan 12, a low-temperature air chamber 13 and an exhaust pipe 15, the fixed bed sealing cover 4 is fixedly arranged on the upper portion of the fixed grate cooling bed 2, the fixed bed air chamber 8 and the fixed bed fan 9 which are communicated are arranged on the lower portion of the fixed grate cooling bed 2, the high-temperature sealing cover 6 and the low-temperature sealing cover 7 are sequentially fixedly arranged on the upper portion of the movable grate cooling bed 5, the sealing cover 4 is connected with the high-temperature sealing cover 6, the high-temperature fan 10 and the high-temperature air chamber 11 which are communicated are arranged on the lower portion of the movable grate cooling bed 5, the low-temperature fan 12 and the low-temperature air chamber 13 which are communicated are arranged on the lower portion of the movable grate cooling bed 5 corresponding to the low-temperature sealing cover 7, the upper portion of the fixed bed sealing cover 4 and the high-temperature sealing cover 6 are provided with the exhaust pipe 15 which are communicated, and the independent exhaust pipe 15 is arranged on the upper portion of the low-temperature sealing cover 7.
Wherein, high-temperature steel slag high-efficient cooling heat transfer comb formula forced air cooling bed still includes comb groove 17, apron 18, connecting plate 19, bed course 20, obturation plate 21, baffle 22, odd comb board 23, even comb board 24, apron 18 covers connects two adjacent comb grooves 17 and forms the unit comb board, and unit comb board upper portion covers the bed course 20, and two adjacent unit comb boards pass through connecting plate 19 rigid coupling and form fixed comb cooling bed 2, and two adjacent unit comb boards pass through obturation plate 21 sliding connection formation portable comb cooling bed 5 of relative sealing, and the apron 18 upper portion of the unit comb board of portable comb cooling bed 5 covers and connects baffle 22, and two adjacent unit comb boards are odd comb board 23, even comb board 24 in proper order.
The electro-hydraulic push rod 16 is a reciprocating push-pull linear electro-hydraulic push rod, the stroke is 100-600mm, the stroke frequency is 0-10 times/minute, the electro-hydraulic push rod 16 is arranged below the front sections of odd-numbered grate plates 23 and even-numbered grate plates 24 of the movable grate cooling bed 5 to provide power for movement of the grate plates, and each grate plate is provided with the independent electro-hydraulic push rod 16.
Wherein, the fixed grate cooling bed 2 and the movable grate cooling bed 5 are both made of heat-resistant and wear-resistant steel materials; the fixed grate cooling bed 2 and the movable grate cooling bed 5 have the same width of 2-6m; the fixed grate cooling bed 2 is 3-15m long, and the movable grate cooling bed 5 is 4-30m long.
Wherein, the flattening crushing roller 3 is a rotary crushing roller tooth structure, and the crushing roller tooth is made of heat-resistant and wear-resistant steel materials. The flattening crushing roller 3 walks above the fixed grate cooling bed 2 for rotary crushing operation, the fixed grate cooling bed 2 is completely covered from the width, and the diameter of the outer edge of the roller teeth of the flattening crushing roller 3 is 1.5-4m. And the main shaft of the flattening crushing roller 3 is cooled by circulating water.
Wherein, the fixed bed closed hood 4 is arranged above the fixed grate cooling bed 2 and the flattening crushing roller 3; the high-temperature closed cover 6 and the low-temperature closed cover 7 are arranged above the movable grate cooling bed 5. The fixed bed sealing cover 4, the high temperature sealing cover 6 and the low temperature sealing cover 7 are all steel structure main body sealing covers, and the thickness of a main body structure steel plate is 3-20mm. Fireproof spraying heat-insulating materials are arranged inside the fixed bed closed cover 4 and the high-temperature closed cover 6, and the thickness of the fireproof spraying heat-insulating materials is 5-60mm; and heat-insulating materials are arranged outside the fixed bed closed cover 4, the high-temperature closed cover 6 and the low-temperature closed cover 7, and the thickness of the heat-insulating materials is 20-200mm.
Wherein, the fixed bed air chamber 8, the high temperature air chamber 11 and the low temperature air chamber 13 are all steel structure closed air blowing chambers, and the thickness of the main structure steel plate is 3-15mm. The fixed bed air chamber 8, the high temperature air chamber 11 and the low temperature air chamber 13 are all rectangular in shape, and the upper parts of the fixed bed air chamber, the high temperature air chamber and the low temperature air chamber correspond to the fixed grate cooling bed 2 and the movable grate cooling bed 5 respectively. And a heat-insulating material is arranged outside the high-temperature air chamber 11, and the thickness of the heat-insulating material is 20-100mm.
Wherein, the fixed bed fan 9, the high temperature fan 10 and the low temperature fan 12 are all variable frequency blowers. The high-temperature fan 10 is a heat-resistant high-temperature blower and can meet the long-term blowing operation at the air temperature of 150-300 ℃.
The slag discharging groove 14 is a steel structure discharging groove, the upper part of the slag discharging groove is wide, the lower part of the slag discharging groove is narrow, the thickness of a main steel structure plate of the slag discharging groove 14 is 5-30mm, and the gradient of a steel plate close to the blanking side is not lower than 45 degrees.
The exhaust pipe 15 is a steel structure pipe, the wall thickness of the pipe is 3-10mm, and a heat insulation material is arranged outside the exhaust pipe 15 and has the thickness of 20-120mm.
Wherein, the grate groove 17 is a groove-shaped component made of heat-resistant and wear-resistant steel materials, and the thickness of the steel materials is 10-30mm. The width of the grate groove 17 is 100-500mm, the height of the two side edges is 50-250mm, and the length is 100-1000mm.
Wherein, the fixed grate cooling bed 2 and the movable grate cooling bed 5 are formed by splicing odd grate plates 23 and even grate plates 24. The odd-numbered comb plates 23 and the even-numbered comb plates 24 are comb plates with the same structure, the odd-numbered comb plates 23 and the even-numbered comb plates 24 are defined according to the sequence number, and the width of each comb plate is 300-600mm.
The odd-numbered grate plates 23 and the even-numbered grate plates 24 of the fixed grate cooling bed 2 are connected and reinforced through the connecting plates 19 in a welding or bolt connection mode, and the odd-numbered grate plates 23 and the even-numbered grate plates 24 do not move relatively. The odd-numbered grate plates 23 and the even-numbered grate plates 24 of the movable grate cooling bed 5 are sealed by sliding friction, and the joints are sealed by sliding friction by adopting the inverted U-shaped obturation plates 21 and the edges of the grate grooves 17. The connecting plate 19 and the obturation plate 21 are made of heat-resistant and wear-resistant steel materials, and the thickness is 10-40mm.
Wherein, the lower parts of the odd-numbered grid plates 23 and the even-numbered grid plates 24 are respectively provided with 2 grid grooves 17, and the interval of the grid grooves 17 is 5-50mm for air blast. A cover plate 18 is arranged above the grate groove 17 to prevent the steel slag 1 from falling to block an air blast gap.
The cover plate 18 is a member made of heat-resistant and wear-resistant steel material, and the thickness of the steel material is 10-30mm. The cover plate 18 covers the two grate grooves 17 belonging to the single grate plate, the middle part of the cover plate is inverted V-shaped, the adjacent edges of the two grate grooves 17 under the single grate plate can be covered, and the two edges of the cover plate gradually extend to the other edge of the two grate grooves 17 in an arc line. The cover plate 18 is fixed on the grate groove 17 through welding or bolts, and the distance between the edge of the cover plate 18 and the bottom of the grate groove 17 is 5-30mm, so that air blowing conditions are provided.
Wherein, the cushion layer 20 is laid on the fixed grate cooling bed 2 and the movable grate cooling bed 5 and is used for insulating and protecting the fixed grate cooling bed 2 and the movable grate cooling bed 5 from the high-temperature steel slag 1 of the incoming material. The cushion layer 20 is block-shaped steel slag, blast furnace slag or pellet ore and other high temperature resistant block-shaped inorganic non-metallic materials, the particle size of the block-shaped particles is 20-60mm, and the thickness of the cushion layer 20 is 80-300mm.
Wherein, the clapboard 22 is a member made of heat-resistant and wear-resistant steel materials, and the thickness of the steel materials is 10-30mm. The partition plates 22 are uniformly arranged on the odd-numbered grid plates 23 and the even-numbered grid plates 24 of the movable grid cooling bed 5, and the distance between every two adjacent partition plates 22 is 200-1000mm. The partition plate 22 has the same width as the cover plate 18, has a height of 150-4000mm, has a linear upper edge, and has a lower portion fixed to the cover plate 18 by welding or bolts.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means 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 present 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.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The high-efficiency cooling and heat exchange method for the high-temperature steel slag is characterized by comprising the following steps of:
s1, flattening and feeding steel slag, conveying the steel slag (1) in a certain high-temperature state to a fixed grate cooling bed (2) through a slag tank, stirring, crushing and flattening the steel slag (1) by adopting a flattening crushing roller (3), and uniformly arranging the steel slag (1) on the fixed grate cooling bed (2) according to a certain thickness;
s2, cooling and crushing the steel slag, namely, sequentially adopting a fixed grate cooling bed (2) and a movable grate cooling bed (5) to carry out multistage cooling and crushing on the steel slag (1);
and S3, cooling and discharging the steel slag, wherein the steel slag is gradually moved from the starting point of the movable grate cooling bed (5) to the slag discharging groove (14) at a certain speed in the cooling process of the steel slag (1) to finish cooling and discharging under the certain reciprocating pushing action of the electro-hydraulic push rod (16).
2. The efficient cooling and heat exchange method for the high-temperature steel slag according to claim 1, wherein in the step S2, the cooling and crushing of the fixed grate cooling bed (2) comprises the steps of blowing air into a fixed bed air chamber (8) by a fixed bed fan (9) according to a certain operation pressure, enabling the blown air to pass through the fixed grate cooling bed (2) to cool and solidify the high-temperature steel slag (1), and stirring and crushing the high-temperature steel slag (1) on the fixed grate cooling bed (2) by a flattening crushing roller (3) while cooling the high-temperature steel slag (1) to promote the cooling and crushing of the steel slag.
3. The method for efficiently cooling and exchanging heat of high-temperature steel slag according to claim 1, wherein in the step S2, the step of cooling and crushing the high-temperature steel slag by using the movable grate cooling bed (5) comprises the steps of cooling the high-temperature steel slag (1) on the fixed grate cooling bed (2) for a certain time to a certain temperature and crushing the high-temperature steel slag to a certain granularity, and pushing the cooled, solidified and crushed steel slag (1) to the movable grate cooling bed (5) from the fixed grate cooling bed (2) by using a flattening crushing roller (3).
4. The high-efficiency cooling and heat exchanging method for high-temperature steel slag according to claim 3, wherein in the step S2, the step of cooling and crushing the high-temperature steel slag by using the movable grate cooling bed (5) further comprises the steps of starting the high-temperature fan (10) and the low-temperature fan (12) to respectively blow cooling air into the high-temperature air chamber (11) and the low-temperature air chamber (13), and cooling the high-temperature steel slag (1) on the movable grate cooling bed (5) through the movable grate cooling bed (5).
5. The high-efficiency cooling and heat exchanging method for the high-temperature steel slag according to claim 1, wherein in the step S2, the multistage cooling and crushing of the steel slag (1) further comprises the steps of respectively exchanging heat between cold air blown by a fixed bed fan (9) and a high-temperature fan (10) and the steel slag (1) with higher temperature to obtain high-temperature hot air with a certain temperature, and the high-temperature hot air is respectively collected in a centralized manner by a fixed bed closed cover (4) and a high-temperature closed cover (6) and then conveyed to waste heat utilization by an exhaust pipe (15); cold air blown into the low-temperature fan (12) exchanges heat with the steel slag (1) at a lower temperature to obtain low-temperature hot air at a certain temperature, and the low-temperature hot air is collected in a centralized manner through the low-temperature closed cover (7) and then is conveyed to the high-temperature fan (10) through the exhaust pipe (15) to provide cooling air for the high-temperature fan (10).
6. The efficient cooling and heat exchange method for high-temperature steel slag according to claim 1, characterized in that in the step S3, in the reciprocating pushing process of the electro-hydraulic push rod (16), firstly, the odd-numbered grate plates (23) and the even-numbered grate plates (24) simultaneously advance to the slag discharge groove (14) for one stroke, then the odd-numbered grate plates (23) or the even-numbered grate plates (24) are simultaneously and alternately withdrawn, and the steel slag (1) falls into the slag discharge groove (14) at a constant speed when the odd-numbered grate plates (23) or the even-numbered grate plates (24) are withdrawn.
7. A high-temperature steel slag efficient cooling and heat exchange grate type air cooling bed is used for the high-temperature steel slag efficient cooling and heat exchange method according to any one of claims 1 to 6, and is characterized by comprising a fixed grate cooling bed (2), a flattening crushing roller (3), a movable grate cooling bed (5), a slag discharging groove (14) and an electric hydraulic push rod (16), wherein the fixed grate cooling bed (2), the movable grate cooling bed (5) and the slag discharging groove (14) are sequentially connected, the flattening crushing roller (3) is rotatably arranged at the front end of the upper portion of the fixed grate cooling bed (2), the electric hydraulic push rod (16) is arranged at one end of the bottom side of the movable grate cooling bed (5), and the slag discharging groove (14) is arranged at the other end of the movable grate cooling bed (5).
8. The high-temperature steel slag efficient cooling and heat exchange grate type air cooling bed according to claim 7 is characterized by further comprising a fixed bed sealing cover (4), a high-temperature sealing cover (6), a low-temperature sealing cover (7), a fixed bed air chamber (8), a fixed bed fan (9), a high-temperature fan (10), a high-temperature air chamber (11), a low-temperature fan (12), a low-temperature air chamber (13) and an exhaust pipe (15), wherein the fixed bed sealing cover (4) is fixedly arranged on the upper portion of the fixed grate cooling bed (2), the fixed bed air chamber (8) and the high-temperature fan (9) which are communicated are arranged on the lower portion of the fixed grate cooling bed (2), the high-temperature sealing cover (6) and the low-temperature sealing cover (7) are fixedly arranged on the upper portion of the movable grate cooling bed (5) in sequence, the fixed bed sealing cover (4) is connected with the high-temperature sealing cover (6), the high-temperature fan (10) and the high-temperature air chamber (11) which are communicated are arranged on the lower portion of the movable grate cooling bed (5) corresponding to the high-temperature sealing cover (6), and the exhaust pipe (15) are arranged on the upper portion of the independent of the fixed bed sealing cover (7).
9. The high-temperature steel slag efficient cooling and heat exchange grate type air cooling bed according to claim 7 is characterized by further comprising grate grooves (17), cover plates (18), connecting plates (19), cushion layers (20), sealing plates (21), partition plates (22), odd grate plates (23) and even grate plates (24), wherein the cover plates (18) are connected with two adjacent grate grooves (17) in a covering mode to form unit grate plates, the cushion layers (20) are covered on the upper portions of the unit grate plates, two adjacent unit grate plates are fixedly connected through the connecting plates (19) to form a fixed grate cooling bed (2), two adjacent unit grate plates are connected through sliding connection of the sealing plates (21) in a relatively sealed mode to form a movable grate cooling bed (5), the upper portions of the cover plates (18) of the unit grate plates of the movable grate cooling bed (5) are connected with the partition plates (22), and the two adjacent unit grate plates are sequentially provided with the odd grate plates (23) and the even grate plates (24).
10. The high-temperature steel slag efficient cooling heat exchange grate type air cooling bed as claimed in claim 9, wherein the electro-hydraulic push rod (16) is a reciprocating push-pull linear electro-hydraulic push rod, the stroke is 100-600mm, the number of strokes is 0-10 times/minute, the electro-hydraulic push rod (16) is installed below the front sections of the odd-numbered grate plate (23) and the even-numbered grate plate (24) of the movable grate cooling bed (5) to provide power for movement of the grate plates, and each grate plate is provided with an independent electro-hydraulic push rod (16).
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