CN102312024A - Method and system for mechanical granulation of metallurgy slag and waste heat recovery - Google Patents
Method and system for mechanical granulation of metallurgy slag and waste heat recovery Download PDFInfo
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- CN102312024A CN102312024A CN201110213557A CN201110213557A CN102312024A CN 102312024 A CN102312024 A CN 102312024A CN 201110213557 A CN201110213557 A CN 201110213557A CN 201110213557 A CN201110213557 A CN 201110213557A CN 102312024 A CN102312024 A CN 102312024A
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- 239000002893 slag Substances 0.000 title claims abstract description 208
- 238000005469 granulation Methods 0.000 title claims abstract description 75
- 230000003179 granulation Effects 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000011084 recovery Methods 0.000 title abstract description 13
- 239000002918 waste heat Substances 0.000 title abstract description 8
- 238000005272 metallurgy Methods 0.000 title abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 216
- 238000001816 cooling Methods 0.000 claims abstract description 59
- 239000007921 spray Substances 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 15
- 230000018044 dehydration Effects 0.000 claims abstract description 8
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 8
- 239000003818 cinder Substances 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 238000012432 intermediate storage Methods 0.000 claims description 10
- 238000010248 power generation Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 238000007885 magnetic separation Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- VEMKTZHHVJILDY-UHFFFAOYSA-N resmethrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=COC(CC=2C=CC=CC=2)=C1 VEMKTZHHVJILDY-UHFFFAOYSA-N 0.000 description 4
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000009853 pyrometallurgy Methods 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
- 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
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
-
- 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
-
- 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
- C21B2400/056—Drums whereby slag is poured on or in between
-
- 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
- C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising 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
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/074—Tower structures for cooling, being confined but not sealed
-
- 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
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Abstract
The invention discloses a method and a system for mechanical granulation of metallurgy slag and waste heat recovery. The method comprises the following steps: 1, allowing the metallurgy slag in a slag tank to go through a slag spout and enter a water-cooling mechanical granulation apparatus; 2, carrying out mechanical granulation on the metallurgy slag with the water-cooling mechanical granulation apparatus to form granulated slag; 3, spray cooling the granulated slag to allow the granulated slag to fall into a water-cooling slag collection pool; 4, cooling the granulated slag in the water-cooling slag collection pool to release heat, and recovering the heat; 5, taking the cooled granulated slag from the water-cooling slag collection pool with a feeder and a lifting dehydration apparatus and dehydrating the granulated slag in the lifting process; and 6, storing the granulated slag. By adopting a technical scheme of the present invention, the recovery of steam heat is realized, the steam discharge is reduced, the water consumption for granulation is reduced, the water consumption of each ton of the slag for slag processing is reduced, and the water source is saved.
Description
Technical field
The present invention relates to metallurgical technology field, relate in particular to a kind of metallurgical cinder mechanical granulation and exhaust heat recovering method and system.
Background technology
Iron and steel is maximum structured material and the highest functional materials of output of human consumption; Steel industry is the main mainstay industry of China; China's crude steel output was above 600,000,000 tons in 2010; Along with the rapid growth of iron and steel output, resource, the energy and environmental pollution have become the restricted condition of restriction China steel industry sustainable development, in blast furnace, converter, electrosmelting engineering, produce the great amount of high-temperature metallurgical slag; Effective processing of pyrometallurgy slag and the wherein recovery of institute's heat content are significant for iron and steel enterprise's energy efficient, water consumption and pollutant emission.
With the slag is example; The slag treatment system of domestic and international most steelworkss still adopts traditional technologys such as dried slag method, " I.sc " (dish water-sprinkling cold process), hot vexed method, high pressure water quenching; Most of slag naturally cooling transports the waste field to dried slag form then, focuses on.Pile up like a mountain for waste field slag; The slag mountain needs thousands of mu of soils and a few km special purpose railroad, also needs heavy specific equipment and huge production management personnel such as forklift, dozer, crane, automobile, weight, invests greatly, takies the big area good farmland; Simultaneously; Produce a large amount of flue dust and dust pollution,, also bear huge expenses of environmental protection owing to pollution to environment.As stated, slag is handled problems, and is the hard nut to crack that receives much attention for a long time always.And 1 ton of steel of every smelting produces 80 to the 150kg slag, and so the annual slag that produces of China is above 6,000 ten thousand tons.The liquid slag temperature that produces in the smelting process is at 1450 ℃ to 1650 ℃, and the slag heat content is about 1670MJ/t, is equivalent to the thermal value of 65kg mark coal approximately, belongs to high-quality residual heat resources.Iron and steel enterprise to produce 5000000 tons of steel per year is an example, and annual about 600,000 tons of the slag that produces if can reclaim wherein 50% waste heat, is equivalent to annual 3.9 ten thousand tons in the mark coal of practicing thrift.These residual heat resources be because of can not reclaiming, and waste.Therefore the benefit of slag granulation and waste heat recovery is considerable.
Existing process for treating steel slag mainly is: (1) hot application technology, (2) dish water-sprinkling cold (ISC method), (3) steel slag water quenching technology, (4) wind method of quenching.Though some steel enterprise mentions the slag granulated processed, scarcely perfect, granulation efficient is low, and does not have the residual neat recovering system of slag, does not have real energy-conserving and environment-protective.
Summary of the invention
The objective of the invention is to propose a kind of metallurgical cinder mechanical granulation and exhaust heat recovering method and system; Not only realize the recovery of steam heat, and reduced discharge of steam, reduced the consumption of granulation water; Reduce the ton slag water loss of handling slag, practiced thrift the water source.
For reaching this purpose, the present invention adopts following technical scheme:
A kind of metallurgical cinder mechanical granulation and exhaust heat recovering method may further comprise the steps:
Metallurgical cinder in A, the slag ladle gets into water-cooled machinery granulating device through slag trough;
B, water-cooled machinery granulating device carry out mechanical granulation to metallurgical cinder, form grain slag;
C, water-cooled machinery granulating device spray cooling to grain slag, and grain slag falls into water-cooled collection slag bath;
D, grain slag are in water-cooled collection slag bath internal cooling release of heat, and heat is recovered;
E, feeding machine and lifting dewatering unit are pulled cooled grain slag out from water-cooled collection slag bath, grain slag dewaters in lifting process;
F, grain slag is stored.
Step D further may further comprise the steps:
Grain slag produces steam when water-cooled collection slag bath internal cooling release of heat;
The vapour collect cover of water-cooled collection slag bath top is collected steam, gets into first HRU;
In first HRU, the cold water heat exchange that the steam and the first clear water service pump are supplied with, cold water becomes high-temperature-hot-water or steam output, and perhaps steam is supplied with screw expansion power generation unit, generates electricity.
Step D further may further comprise the steps:
Grain slag is heated into hot water with the cold water in the water-cooled collection slag bath when water-cooled collection slag bath internal cooling release of heat;
Hot water gets in the circulating water pool through water collector, hot water return pipe, back water pump;
Hot water is supplied with second HRU through the hot water service pump in the circulating water pool, and with the cold water heat exchange that the second clear water service pump is supplied with, cold water becomes hot water output, and perhaps hot water supply screw expansion power generation unit generates electricity;
Lower the temperature after the hot water heat exchange that circulating water pool is supplied with, come back to circulating water pool through return water pipe.
Step F further may further comprise the steps:
Grain slag gets into the intermediate storage storehouse through the blanking chute, through material feeder, gets into travelling belt from middle storage silo;
The cylinder of travelling belt adopts electromagnetic cylinder, and grain slag is carried out magnetic separation;
The metal object that magnetic separation is come out in the grain slag falls into the metal storehouse through distributor chute, and other material falls into finished product slag storehouse through distributor chute in the grain slag.
Metallurgical cinder is blast furnace slag, bessemer furnace slag or electric furnace slag.
A kind of metallurgical cinder mechanical granulation and residual neat recovering system; Comprise the slag pot tipping machine; Slag ladle; Slag trough; Water-cooled machinery granulating device; Vapour collect cover; First HRU; The first clear water service pump; Promote dewatering unit; The blanking chute; Water-cooled collection slag bath; Water collector; Feeding machine; Hot water return pipe; Back water pump; Circulating water pool; The hot water service pump; Return water pipe; Granulation is used service pump; Cooling tower; The second clear water service pump; Second HRU; The hydraulic pressure system that tumbles; Granulation water service pipe and collection vapour chimney
Wherein, slag ladle is positioned at slag pot tipping machine top, and the slag pot tipping machine is equipped with the hydraulic pressure system that tumbles; Slag trough is positioned at slag pot tipping machine one side, and water-cooled machinery granulating device is positioned at the slag trough notch, and the below of water-cooled machinery granulating device is provided with water-cooled collection slag bath; Vapour collect cover is positioned at water-cooled collection slag bath top, and covers on the inside to water-cooled machinery granulating device, and first HRU and collection vapour chimney are installed in the top of vapour collect cover; Be connected with feeding machine at the bottom of the pond of water-cooled collection slag bath; The opposite side of feeding machine is installed and is promoted dewatering unit, promotes the connection blanking chute suitable for reading of dewatering unit
The below of water-cooled collection slag bath is provided with water collector, and the water collector below connects hot water return pipe and back water pump, and the backwater pump outlet connects circulating water pool; Circulating water pool is connected with the import of hot water service pump, and hot water feedwater pump outlet is divided into two-way, and one the tunnel connects cooling tower; One the tunnel connects second HRU; The outlet of the outlet of cooling tower and second HRU is connected with circulating water pool respectively, and circulating water pool is connected with the service pump import with granulation, and granulation connects the granulation water service pipe with the feedwater pump outlet; The granulation water service pipe is connected with water-cooled machinery granulating device
The first clear water service pump is connected with first HRU, and the second clear water service pump is connected with second HRU.
Also comprise intermediate storage storehouse, material feeder, travelling belt, electromagnetic cylinder, distributor chute, metal storehouse, finished product slag storehouse; Blanking chute below sets gradually intermediate storage storehouse, material feeder and travelling belt; The great wheel of travelling belt adopts electromagnetic cylinder; The below of electromagnetic cylinder is provided with distributor chute, and the distributor chute below connects metal storehouse and finished product slag storehouse respectively.
Water-cooled collection slag bath is the shape of falling the rectangular pyramid.
Water collector is provided with filter screen.
Promote dewatering unit and adopt stainless steel filtering net dehydration bucket, promote dewatering unit afterbody sections, sealing sections, open segments, head transmission sections and lift pot are set.
First HRU and second HRU are hot tube heat exchanger or or screw expansion power generation unit.
The hydraulic pressure system of tumbling of slag pot tipping machine comprises the backing ring of tumbling, tumble hydro-cylinder or oil motor, hydraulic power unit, locking latches and pillar.
Water-cooled machinery granulating device comprises rotation water-cooling granulating wheel, drive mechanism, spray water device for cooling and granulating device cover body, and the spray water device for cooling is positioned at rotation water-cooling granulating wheel top.
Adopted technical scheme of the present invention, not only solved the mechanical granulation of fused metallurgical slag, and effective and feasible recovery the heat in the slag granulation process of cooling.The mechanical granulation of fused metallurgical slag, the working strength of workers that not only reduces, accident such as avoided exploding in the metallurgical slag treating processes; And great amount of manpower and material resources, soil have been practiced thrift; Reduced and polluted and discharging, reduced the current consumption and the water loss of ton slag, practiced thrift the energy.Simultaneously effective and feasible residual neat recovering system; The heat of slag is fully reclaimed, further promoted the effect of the energy-saving and emission-reduction of this system, really accomplished energy-saving and environmental protection, safety, efficient; For enterprise brings high economic benefit simultaneously, for huge contribution is done in social energy-saving and environmental protection.
Description of drawings
Fig. 1 is the structural representation of metallurgical cinder mechanical granulation and residual neat recovering system in the specific embodiment of the invention.
Fig. 2 is metallurgical cinder mechanical granulation and a waste heat recovery schema in the specific embodiment of the invention.
Embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and through embodiment.
The main thought of technical scheme of the present invention is that metallurgical cinder is through slag trough; Entering has crossfire water-cooled machinery granulating device; With the cooling of the spray of the spray water device for cooling in the water-cooled mechanical granulation device, fall into water-cooled collection slag bath then in the time of the slag mechanical granulation, in water-cooled collection slag bath, fully cool off release of heat; From water-cooled collection slag bath, pull granulation and refrigerative grain slag out through feeding machine and lifting dewatering unit then; Fully dehydration in the lifting process gets into the intermediate storage storehouse or the storage of directly landing through the blanking chute then, realized the process of the quick granulation of fused metallurgical slag, cooling, heat exchange, dehydration.Grain slag through material feeder, gets into travelling belt from middle storage silo, and the cylinder of travelling belt adopts electromagnetic cylinder, and grain slag is carried out preliminary magnetic separation, and the metal object in the distributor chute grain slag falls into the metal storehouse then, and other falls into finished product slag storehouse.Slag fully cools off release of heat through spray water device for cooling and water-cooled collection slag bath in the granulating, and the transfer of heat more than 95% has arrived in the water, produces a large amount of steam and circulating hot water; Therefore pass through first HRU and second HRU at vapour collect cover top and circulating water pool place; With the clear water heat exchange, produce the high-temperature-hot-water or the steam of cleaning, perhaps steam is supplied with screw expansion power generation unit; Generate electricity, realize the waste heat recovery in the metallurgical cinder mechanical granulation process.
Fig. 1 is the structural representation of metallurgical cinder mechanical granulation and residual neat recovering system in the specific embodiment of the invention.As shown in Figure 1; As shown in Figure 1, this metallurgical cinder mechanical granulation and residual neat recovering system comprise slag pot tipping machine 1, slag ladle 2, slag trough 3, water-cooled machinery granulating device 4, vapour collect cover 6, first HRU 7, the first clear water service pump 8, promote dewatering unit 9, blanking chute 10, intermediate storage storehouse 11, material feeder 12, travelling belt 13, electromagnetic cylinder 14, distributor chute 15, metal storehouse 16, finished product slag storehouse 17, water-cooled collection slag bath 18, water collector 20, feeding machine 22, hot water return pipe 23, back water pump 24, circulating water pool 25, hot water service pump 26, return water pipe 27, granulation be with service pump 28, cooling tower 29, the second clear water service pump 30, second HRU 31, hydraulic pressure tumble system 32, granulation water service pipe 33 and collect vapour chimney 34.
Water-cooled machinery granulating device further comprises rotation water-cooling granulating wheel, drive mechanism, spray water device for cooling 5 and granulating device cover body, and the spray water device for cooling is positioned at rotation water-cooling granulating wheel top.
Wherein, Slag ladle is positioned at slag pot tipping machine top; The slag pot tipping machine is equipped with the hydraulic pressure system that tumbles; The hydraulic pressure system of tumbling of slag pot tipping machine comprises the backing ring of tumbling, tumble hydro-cylinder or oil motor, hydraulic power unit, locking latches and pillar, and tumble hydro-cylinder or oil motor of passing ratio speed governing controlled tipping speed.Slag trough is positioned at slag pot tipping machine one side, and water-cooled machinery granulating device is positioned at the slag trough notch, and the spray water device for cooling is installed in the rotation water-cooling granulating wheel top of water-cooled machinery granulating device; The below of water-cooled machinery granulating device is provided with water-cooled collection slag bath, and vapour collect cover is positioned at water-cooled collection slag bath top, and covers on the inside to water-cooled machinery granulating device; First HRU and collection vapour chimney are installed in the top of vapour collect cover; Be connected with feeding machine at the bottom of the pond of water-cooled collection slag bath, the opposite side of feeding machine is installed and is promoted dewatering unit, promotes the connection blanking chute suitable for reading of dewatering unit; Blanking chute below sets gradually intermediate storage storehouse, material feeder and travelling belt; The great wheel of travelling belt adopts electromagnetic cylinder, and the below of electromagnetic cylinder is provided with distributor chute, and the distributor chute below connects metal storehouse and finished product slag storehouse respectively.
The below of water-cooled collection slag bath is provided with water collector, and the water collector below connects hot water return pipe and back water pump, and the backwater pump outlet connects circulating water pool; Circulating water pool is connected with the import of hot water service pump; Hot water feedwater pump outlet is divided into two-way, and one the tunnel connects cooling tower, and one the tunnel connects second HRU; The outlet of the outlet of cooling tower and second HRU is connected with circulating water pool respectively; Circulating water pool is connected with the service pump import with granulation, and granulation connects the granulation water service pipe with the feedwater pump outlet, and the granulation water service pipe is received the rotation water-cooling granulating wheel and the spray water device for cooling of water-cooled machinery granulating device respectively.
The first clear water service pump is connected with first HRU, and the second clear water service pump is connected with second HRU.
Water-cooled collection slag bath is the shape of falling the rectangular pyramid, and according to the slag different cone angle respective change of institute's granulation, water-cooled collection slag bath end opening links to each other with feeding machine, and the feeding machine opposite side is connected with the lifting dewatering unit.Water-cooled collection slag bath is provided with water collector, and water collector is provided with filter screen, prevents that grain slag from getting into, and the granulation water is transported to circulating water pool through back water pump.
Promote dewatering unit and adopt stainless steel filtering net dehydration bucket, promote dewatering unit afterbody sections, sealing sections, open segments, head transmission sections and lift pot are set.
First HRU and second HRU are hot tube heat exchanger, and perhaps screw expansion power generation unit also can adopt the interchanger of other form.
Fig. 2 is metallurgical cinder mechanical granulation and a waste heat recovery schema in the specific embodiment of the invention.As shown in Figure 2, the operational scheme of this system is following:
Metallurgical cinder both can be a blast furnace slag, also can be electric furnace slags such as bessemer furnace slag, or iron alloy.Blast furnace slag directly enters into the mechanical granulation device that has the crossfire water-cooled through slag trough in this way; Electric furnace slag such as bessemer furnace slag or iron alloy in this way; Generally be to be contained in the slag ladle; Slag ladle is sitting on the slag pot tipping machine; The slag pot tipping machine has the hydraulic pressure system that tumbles, and metallurgical cinder is poured slag trough into through having the tumble slag pot tipping machine of system of hydraulic pressure, is to have crossfire water-cooled machinery granulating device below the slag trough mouth.Above the rotation water-cooling granulating wheel of water-cooled machinery granulating device is the spray water device for cooling, is water-cooled collection slag bath below, and vapour collect cover is sitting on the water-cooled collection slag bath, and covers on the inside to water-cooled machinery granulating device.Above the vapour collect cover first HRU and collection vapour chimney.Water-cooled collection slag bath is possessed the water coolant 19 of certain liquid; Be connected with feeding machine at the bottom of the pond of water-cooled collection slag bath; The opposite side of feeding machine is to promote dewatering unit, and the fused metallurgical slag fully cools off release of heat in water-cooled collection slag bath, after grain slag 21 cools off in water-cooled collection slag bath; From water-cooled collection slag bath, pull fully dehydration in the lifting process out through feeding machine and lifting dewatering unit.Promoting the blanking chute that connects suitable for reading of dewatering unit, is intermediate storage storehouse, material feeder, travelling belt below successively, and the travelling belt great wheel adopts electromagnetic cylinder, and grain slag is carried out magnetic separation.Being distributor chute below the electromagnetic cylinder, is metal storehouse and finished product slag storehouse below the distributor chute.Grain slag through promoting water trap also can directly land through the blanking chute, and outward transport is handled.Realized the process of fused metallurgical slag quick granulation, cooling, heat exchange, dehydration.About 30 ℃ of the grain slag temperature of this moment, granularity 3-8mm, granularity 3-5mm accounts for 95%, and water ratio is less than 8%.
Slag fully cools off release of heat through spray water device for cooling and water-cooled collection slag bath in the granulating, and the transfer of heat more than 95% has arrived in the water, produces a large amount of steam and circulating hot water; Therefore on water-cooled collection slag bath, vapour collect cover is set; The vapour collect cover top is provided with first HRU of recovery of heat, and steam is produced the thermobiosis hot water or the steam of cleaning through the cold water heat exchange of first HRU and the supply of the first clear water service pump; Perhaps steam is supplied with screw expansion power generation unit, generates electricity.Steam condensation owing to heat exchange, condensate return has only the small amount of steam high altitude discharge to water-cooled collection slag bath.This process has not only realized the recovery of steam heat, and has reduced discharge of steam, has been equivalent to reduce the consumption of granulation water, has reduced the ton slag water loss of handling slag, has practiced thrift the water source.
Being provided with water collector below the water-cooled collection slag bath, is hot water return pipe and back water pump below the water collector, and the back water pump water outlet connects circulating water pool.Circulating water pool is provided with the cooling tower and second HRU; The import of hot water service pump is connected with circulating water pool, and outlet is divided into two-way, and one the tunnel connects cooling tower; One the tunnel connects second HRU, is back to circulating water pool through the cooling tower or the second HRU water coolant.Granulation connects circulating water pool with the service pump import; Outlet connects the granulation water service pipe; Receive the rotation water-cooling granulating wheel and the spray water device for cooling of crossfire water-cooled machinery granulating device respectively, granulation water is got back to circulating water pool through water-cooled collection slag bath, water collector, return water pipe, back water pump then, realizes using water cycle.First HRU and second HRU, one side are advanced cold water through the first clear water service pump and the second clear water service pump, and high-temperature-hot-water or steam are produced in heat exchange.
Hot water part in the water-cooled collection slag bath has produced steam, and another part is got back in the circulating water pool through water collector, hot water return pipe, back water pump; The water temperature of this moment is higher generally more than 80 ℃; Through the hot water service pump, the one road supplies with cooling tower, and one the road supplies with second HRU.At first select is to supply with second HRU; The high-temperature water of circulating water pool is passed through second HRU,, absorb heat and produce thermobiosis hot water with the cold water heat exchange that the second clear water service pump is supplied with; Perhaps high-temperature water is supplied with screw expansion power generation unit, generates electricity.High-temperature water is low through the heat exchange water temperature drop, comes back to circulating water pool through return water pipe, supplies granulation system to use water cycle.The maintenance situation occurs like HRU, available cooling tower cooling is to satisfy the requirement of granulation system low temperature water round-robin.
The water of granulation system; Adopt granulation from circulating water pool, to extract water at low temperature with service pump; Through the granulation water service pipe; Supply with the rotation water-cooling granulating wheel and the spray water device for cooling water of water-cooled machinery granulating device, get back to circulating water pool again through water-cooled collection slag bath, water collector, return water pipe and back water pump granulation water then, so circulation.Whether back water pump can be provided with according to the project situation decision, can adopt natural back flow.
The present invention is simple in structure, connection and reasonable arrangement, and floor space is little; Promptly realized the mechanical granulation fast of metallurgical cinder; Avoided the accidents such as blast in the metallurgical cinder treating processes, and practiced thrift great amount of manpower and material resources, soil, reduced and polluted and discharging; Reduce the current consumption and the water loss of ton slag, practiced thrift the energy.Simultaneously effective and feasiblely realize the waste heat recovery in the granulating, further promoted the effect of the energy-saving and emission-reduction of this system, really accomplished energy-saving and environmental protection, safety, efficiently.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (13)
1. metallurgical cinder mechanical granulation and exhaust heat recovering method is characterized in that, may further comprise the steps:
Metallurgical cinder in A, the slag ladle gets into water-cooled machinery granulating device through slag trough;
B, water-cooled machinery granulating device carry out mechanical granulation to metallurgical cinder, form grain slag;
C, water-cooled machinery granulating device spray cooling to grain slag, and grain slag falls into water-cooled collection slag bath;
D, grain slag are in water-cooled collection slag bath internal cooling release of heat, and heat is recovered;
E, feeding machine and lifting dewatering unit are pulled cooled grain slag out from water-cooled collection slag bath, grain slag dewaters in lifting process;
F, grain slag is stored.
2. a kind of metallurgical cinder mechanical granulation according to claim 1 and exhaust heat recovering method is characterized in that step D further may further comprise the steps:
Grain slag produces steam when water-cooled collection slag bath internal cooling release of heat;
The vapour collect cover of water-cooled collection slag bath top is collected steam, gets into first HRU;
In first HRU, the cold water heat exchange that the steam and the first clear water service pump are supplied with, cold water becomes high-temperature-hot-water or steam output, and perhaps steam is supplied with screw expansion power generation unit, generates electricity.
3. a kind of metallurgical cinder mechanical granulation according to claim 1 and exhaust heat recovering method is characterized in that step D further may further comprise the steps:
Grain slag is heated into hot water with the cold water in the water-cooled collection slag bath when water-cooled collection slag bath internal cooling release of heat;
Hot water gets in the circulating water pool through water collector, hot water return pipe, back water pump;
Hot water is supplied with second HRU through the hot water service pump in the circulating water pool, and with the cold water heat exchange that the second clear water service pump is supplied with, cold water becomes hot water output, and perhaps hot water supply screw expansion power generation unit generates electricity;
Lower the temperature after the hot water heat exchange that circulating water pool is supplied with, come back to circulating water pool through return water pipe.
4. a kind of metallurgical cinder mechanical granulation according to claim 1 and exhaust heat recovering method is characterized in that step F further may further comprise the steps:
Grain slag gets into the intermediate storage storehouse through the blanking chute, through material feeder, gets into travelling belt from middle storage silo;
The cylinder of travelling belt adopts electromagnetic cylinder, and grain slag is carried out magnetic separation;
The metal object that magnetic separation is come out in the grain slag falls into the metal storehouse through distributor chute, and other material falls into finished product slag storehouse through distributor chute in the grain slag.
5. a kind of metallurgical cinder mechanical granulation according to claim 1 and exhaust heat recovering method is characterized in that metallurgical cinder is blast furnace slag, bessemer furnace slag or electric furnace slag.
6. metallurgical cinder mechanical granulation and residual neat recovering system; It is characterized in that; Comprise the slag pot tipping machine; Slag ladle; Slag trough; Water-cooled machinery granulating device; Vapour collect cover; First HRU; The first clear water service pump; Promote dewatering unit; The blanking chute; Water-cooled collection slag bath; Water collector; Feeding machine; Hot water return pipe; Back water pump; Circulating water pool; The hot water service pump; Return water pipe; Granulation is used service pump; Cooling tower; The second clear water service pump; Second HRU; The hydraulic pressure system that tumbles; Granulation water service pipe and collection vapour chimney
Wherein, slag ladle is positioned at slag pot tipping machine top, and the slag pot tipping machine is equipped with the hydraulic pressure system that tumbles; Slag trough is positioned at slag pot tipping machine one side, and water-cooled machinery granulating device is positioned at the slag trough notch, and the below of water-cooled machinery granulating device is provided with water-cooled collection slag bath; Vapour collect cover is positioned at water-cooled collection slag bath top, and covers on the inside to water-cooled machinery granulating device, and first HRU and collection vapour chimney are installed in the top of vapour collect cover; Be connected with feeding machine at the bottom of the pond of water-cooled collection slag bath; The opposite side of feeding machine is installed and is promoted dewatering unit, promotes the connection blanking chute suitable for reading of dewatering unit
The below of water-cooled collection slag bath is provided with water collector, and the water collector below connects hot water return pipe and back water pump, and the backwater pump outlet connects circulating water pool; Circulating water pool is connected with the import of hot water service pump, and hot water feedwater pump outlet is divided into two-way, and one the tunnel connects cooling tower; One the tunnel connects second HRU; The outlet of the outlet of cooling tower and second HRU is connected with circulating water pool respectively, and circulating water pool is connected with the service pump import with granulation, and granulation connects the granulation water service pipe with the feedwater pump outlet; The granulation water service pipe is connected with water-cooled machinery granulating device
The first clear water service pump is connected with first HRU, and the second clear water service pump is connected with second HRU.
7. a kind of metallurgical cinder mechanical granulation according to claim 6 and residual neat recovering system; It is characterized in that; Also comprise intermediate storage storehouse, material feeder, travelling belt, electromagnetic cylinder, distributor chute, metal storehouse, finished product slag storehouse, blanking chute below sets gradually intermediate storage storehouse, material feeder and travelling belt, and the great wheel of travelling belt adopts electromagnetic cylinder; The below of electromagnetic cylinder is provided with distributor chute, and the distributor chute below connects metal storehouse and finished product slag storehouse respectively.
8. a kind of metallurgical cinder mechanical granulation according to claim 6 and residual neat recovering system is characterized in that water-cooled collection slag bath is the shape of falling the rectangular pyramid.
9. a kind of metallurgical cinder mechanical granulation according to claim 6 and residual neat recovering system is characterized in that water collector is provided with filter screen.
10. a kind of metallurgical cinder mechanical granulation according to claim 6 and residual neat recovering system; It is characterized in that; Promote dewatering unit and adopt stainless steel filtering net dehydration bucket, promote dewatering unit afterbody sections, sealing sections, open segments, head transmission sections and lift pot are set.
11. a kind of metallurgical cinder mechanical granulation according to claim 6 and residual neat recovering system is characterized in that, first HRU and second HRU are hot tube heat exchanger or or screw expansion power generation unit.
12. a kind of metallurgical cinder mechanical granulation according to claim 6 and residual neat recovering system is characterized in that, the hydraulic pressure system of tumbling of slag pot tipping machine comprises the backing ring of tumbling, tumble hydro-cylinder or oil motor, hydraulic power unit, locking latches and pillar.
13. a kind of metallurgical cinder mechanical granulation according to claim 6 and residual neat recovering system; It is characterized in that; Water-cooled machinery granulating device comprises rotation water-cooling granulating wheel, drive mechanism, spray water device for cooling and granulating device cover body, and the spray water device for cooling is positioned at rotation water-cooling granulating wheel top.
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| CN201110213557XA CN102312024B (en) | 2011-07-28 | 2011-07-28 | Method and system for mechanical granulation of metallurgy slag and waste heat recovery |
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| CN104946827A (en) * | 2015-06-13 | 2015-09-30 | 秦皇岛首秦金属材料有限公司 | Water-washing and quenching method for ladle casting residue slag |
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| CN111748663A (en) * | 2019-03-27 | 2020-10-09 | 河北怡智环保科技有限公司 | Car type continuous iron-making water-slag separation environment-friendly device |
| CN109827441A (en) * | 2019-04-01 | 2019-05-31 | 史晓云 | A kind of equipment suitable for high-temperature molten material cooling and waste heat recycling |
| CN111717933A (en) * | 2020-06-29 | 2020-09-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Reduce rutile type TiO in titanium slag2Titanium slag rapid cooling system and method |
| CN111979366A (en) * | 2020-08-25 | 2020-11-24 | 山东盛阳工程机械有限公司 | Liquid steel slag wind quenching and granulating production line and production process thereof |
| CN111979366B (en) * | 2020-08-25 | 2024-02-13 | 山东盛阳工程机械有限公司 | Liquid steel slag air quenching granulating production line and production process thereof |
| CN112342326A (en) * | 2020-09-22 | 2021-02-09 | 济钢集团国际工程技术有限公司 | High-efficiency treatment system and treatment process for high-temperature steel slag |
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