CN105567891B - A kind of high-temperature liquid state slag heat energy extracting method - Google Patents
A kind of high-temperature liquid state slag heat energy extracting method Download PDFInfo
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- CN105567891B CN105567891B CN201511002486.3A CN201511002486A CN105567891B CN 105567891 B CN105567891 B CN 105567891B CN 201511002486 A CN201511002486 A CN 201511002486A CN 105567891 B CN105567891 B CN 105567891B
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- slag
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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
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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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2200/00—Recycling of non-gaseous waste material
-
- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- 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
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Furnace Details (AREA)
Abstract
The present invention relates to a kind of high-temperature liquid state slag heat energy extracting method, carry out according to the following steps：Blast furnace red dregs liquid is assigned in slag chute or slag ladle through branch's slag runner, slag-drip opening through slag chute or slag ladle bottom, into gas or water knife shearing device, blast furnace red dregs liquid is cut off through gas or water knife flash, obtain the slag particle post of certain length, a section slag particle post is cut into vertically into quick cooling tube, the cooling gas being ejected by quick cooling tube is rapidly cooled down, make slag particle post Surface hardened layer, case-hardened slag particle post is under gravity, imported and exchanged heat in air-cooled cylinder by inclined tube, cooling wind is blasted from air-cooled cylinder bottom, slag particle post is when moving down, walked on cooling wind direction in slag particle intercolumniation gap, slag particle post is gradually cooled down, discharged by the discharge mechanism of air-cooled cylinder, wind is cooled down constantly to be heated, high-temperature hot-air feeding boiler is formed to generate electricity, the slag particle post of cooling is sent into feed bin by belt to be used for producing insulation material, light material or milling make the adulterant of cement industry.
Description
Technical field
It is that one kind extracts heat energy from high-temperature liquid furnace slag the present invention relates to metallurgical system field of Environment Protection a new technology
Method.
Background technology
Blast furnace is the industrial furnace for producing molten iron, and its primary raw material is iron ore and coke, is produced in process of production
Molten iron and blast-furnace slag, blast-furnace slag release after through trough, into water cooling sluice, high temperature furnace slag water cooling quick refrigeration, into
For blast furnace granulated slag, blast furnace granulated slag passes through fine grinding, as superfine powder, is used as cement plant or the adulterant of concrete mixing plant.
The yield of current blast-furnace slag is pressed as about 500 kilograms of calculating of molten iron per ton, the steel enterprise of 10,000,000 tons of scales
Industry, its blast furnace quantity of slag is 5,000,000 tons, and high temperature sludge temperature is more than 1400 degree, the direct drastically water cooling of so substantial amounts of high temperature sludge, production
Raw substantial amounts of water vapour, it is impossible to utilize, all emptying, causes great energy waste, and very big adverse effect is produced to environment,
Existing this process is widely used in national major iron and steel enterprises.
The content of the invention
The purpose of the present invention provides a kind of high to overcome the problem of heat energy of above-mentioned prior art presence is difficult by
Warm liquid slag heat energy extracting method.This method changes existing high temperature furnace slag quick refrigeration technique, the State of Blast Furnace that high temperature is come out
Slag, using air knife or high pressure waterjet, quick cooling liquid high temperature sludge is made granular, is then extracted wherein by air cooling way
Heat energy, be converted to high-temperature hot-air, through boiler produce steam, realize generate electricity.Produced granulated slag can be protected for production
Adiabator, light material or grinds as cement industry adulterant.
In order to solve the above technical problems, realize heat energy power-generating, the present invention intend the technical scheme that uses for：
A kind of high-temperature liquid state slag heat energy extracting method, it is characterised in that carry out according to the following steps：Blast furnace red dregs liquid is through branch
Slag runner is assigned in slag chute or slag ladle, the slag-drip opening through slag chute or slag ladle bottom, into gas or water knife shearing device, blast furnace red
Slag liquid is cut off through gas or water knife flash, is obtained the slag particle post of certain length, is cut into a section slag particle post vertically into fast
Fast cooling tube, the cooling gas being ejected by quick cooling tube is rapidly cooled down, and makes slag particle post Surface hardened layer, case-hardened slag
Grain post under gravity, is imported by inclined tube and exchanged heat in air-cooled cylinder bottom, and cooling wind is blasted from air-cooled cylinder bottom, slag particle post
When moving down, walked on cooling wind direction in slag particle intercolumniation gap, slag particle post is gradually cooled down, finally by the discharge of air-cooled cylinder
Mechanism is discharged, and cooling wind is constantly heated, and is eventually formed high-temperature hot-air feeding boiler and is generated electricity, the slag particle post of cooling is sent by belt
Enter and be used for producing the adulterant that insulation material, light material or milling make cement industry in feed bin.
What branch's slag runner set up separately on the basis of former slag runner, when the inventive method breaks down, blocked with stemming
Branch's slag runner, reinstates former slag runner, and very little is influenceed on blast fumance.
Installed at the discharge gate of branch's slag runner and two slag chutes or slag ladle be provided with below an oscillating chute, chute,
The blast furnace red dregs liquid come through branch's slag runner passes through oscillating chute, is assigned in two slag chutes in left and right or slag ladle, when normally producing
Only one slag chute or slag ladle are just enough, set one as standby more.Slag-drip opening is arranged at each slag chute or slag ladle bottom, and equipped with slip
The mouth of a river, the off and on for controlling blast furnace red dregs liquid to flow out by slide gate nozzle.
The present invention to gas or water knife shearing device, quick cooling tube, air-cooled cylinder, belt feeder be existing structure.
Due to gas or water knife shearing device, by gases at high pressure or water knife by solenoid valve control, realize that flash is cut off, lead to
The time control to electromagnetic valve switch is crossed, the slag particle post of certain length can be obtained.When being cut off due to flash, high-velocity fluid is cut through
Slag stream, and moment can solidify slag flow section, as cutting wound with laser, moment it can carry out and stop blooding.
Because quick cooling tube is bilayer, middle part is connected with cooling gas, and inwall, which is covered with, aperture, the liquid slag particle after being cut
Post, the cooling gas being ejected rapidly is cooled down, Surface hardened layer is allowed to, to drop into during air-cooled cylinder, will not be sent out from each other
Raw adhesion.
The present invention has the income of huge economical and environmentally friendly aspect.
Economic aspect：
The slag particle of the present invention remains to the utilization of resources value with former water quenching technology, in addition, the heat of its high temperature sludge
It can propose, for generating electricity, it will produce huge economic benefit.
Environmentally friendly income：
The present invention proposes the heat energy in high temperature sludge to be generated electricity, so as to greatly reduce water quenching by substantial amounts of high temperature sludge
Heat is brought into environment, is consumed water resource, is caused a series of environmental problem.
Brief description of the drawings
Fig. 1 is process chart of the invention.
Embodiment
The invention will be further described for Structure Figure and embodiment.
As shown in figure 1, the present invention is carried out according to the following steps：Blast furnace red dregs liquid is assigned to slag chute or slag ladle through branch's slag runner
In, the slag-drip opening through slag chute or slag ladle bottom, into gas or water knife shearing device, blast furnace red dregs liquid is through gas or water knife flash
Cut-out, obtains the slag particle post of certain length, a section slag particle post is cut into vertically into quick cooling tube, by quick cooling
The cooling gas that pipe is ejected rapidly is cooled down, and makes slag particle post Surface hardened layer, and case-hardened slag particle post under gravity, passes through
Inclined tube is imported to be exchanged heat in air-cooled cylinder bottom, and cooling wind is blasted from air-cooled cylinder bottom, and slag particle post cools down wind direction when moving down
On walked in slag particle intercolumniation gap, slag particle post is gradually cooled down, and is discharged finally by the discharge mechanism of air-cooled cylinder, the continuous quilt of cooling wind
Heating, eventually forms high-temperature hot-air feeding boiler and generates electricity, and the slag particle post of cooling is sent into feed bin by belt to be used for producing insulation
Material, light material or milling make the adulterant of cement industry.What branch's slag runner set up separately on the basis of former slag runner, when this
When inventive method breaks down, branch's slag runner is blocked with stemming, former slag runner is reinstated, rush former slag runner with water influences very on blast fumance
It is small.Installed at the discharge gate of branch's slag runner and two slag chutes or slag ladle are provided with below an oscillating chute, chute, through branch
The blast furnace red dregs liquid that slag runner comes passes through oscillating chute, is assigned in two slag chutes in left and right or slag ladle, only one during normal production
Slag chute or slag ladle are just enough, set one as standby more.Slag-drip opening is arranged at each slag chute or slag ladle bottom, and equipped with slide gate nozzle,
The off and on for controlling blast furnace red dregs liquid to flow out by slide gate nozzle.
The present invention to gas or water knife shearing device, quick cooling tube, air-cooled cylinder, belt feeder be existing structure.
Due to gas or water knife shearing device, by gases at high pressure or water knife by solenoid valve control, realize that flash is cut off, lead to
The time control to electromagnetic valve switch is crossed, the slag particle post of certain length can be obtained.When being cut off due to flash, high-velocity fluid is cut through
Slag stream, and moment can solidify slag flow section, as cutting wound with laser, moment it can carry out and stop blooding.
Because quick cooling tube is bilayer, middle part is connected with cooling gas, and inwall, which is covered with, aperture, the liquid slag particle after being cut
Post, the cooling gas being ejected rapidly is cooled down, Surface hardened layer is allowed to, to drop into during air-cooled cylinder, will not be sent out from each other
Raw adhesion.
It is clear in order to be further described below, present invention process and traditional water quenching technology are now compared explanation.
1st, high furnace slag discharge process
Blast furnace is when tapping a blast furnace, and the discharge of molten iron simultaneously also can together take slag out of, and slag iron mixture passes through worn-out slag device, by iron
Water is separated with slag, and molten iron is flowed into hot-metal bottle through iron runner, and high temperature sludge is flowed into slag runner.
2nd, water quenching process and granulating working procedure
In traditional blast furnace residues processing technique, the high temperature sludge (being also red slag) come through slag runner will carry out water quenching process, tool
Body is exactly that high temperature sludge is flowed into water slag-flushing groove, and quick refrigeration forms grain slag, with current are poured in slag bath, while producing substantial amounts of
Water vapour, the energy is greatly wasted.
The new technology of the present invention is that high temperature sludge is flowed into slag chute, then into the high temperature prilling of core, shape
Into high temperature slag particle.
3rd, heat energy abstraction process
Because traditional technique high temperature clinker is after water quenching, its heat will be brought into water, become water vapour emptying, heat
Amount is difficult to reclaim.But exclusive core process is high temperature granulation and heat energy abstraction process in new technology, by forming high temperature slag particle
Extracted with the heat energy of air-cooled cylinder, so as to realize the Collection utilization of heat energy.
4th, Waste Heat Generation process
The high temperature air extracted in the process of the present invention enters waste heat boiler, is then generated electricity, the generating work
Sequence is conventional art.
Claims (4)
1. a kind of high-temperature liquid state slag heat energy extracting method, it is characterised in that carry out according to the following steps：Blast furnace red dregs liquid is through branch's slag
Ditch is assigned in slag chute or slag ladle, the slag-drip opening through slag chute or slag ladle bottom, into gas or water knife shearing device, blast furnace red dregs
Liquid is cut off through gas or water knife flash, is obtained the slag particle post of certain length, is cut into a section slag particle post vertically into quick
Cooling tube, the cooling gas being ejected by quick cooling tube is rapidly cooled down, and makes slag particle post Surface hardened layer, case-hardened slag particle
Post under gravity, is imported by inclined tube and exchanged heat in air-cooled cylinder bottom, and cooling wind is blasted from air-cooled cylinder bottom, and slag particle post exists
When moving down, walked on cooling wind direction in slag particle intercolumniation gap, slag particle post is gradually cooled down, finally by the material discharging machine of air-cooled cylinder
Structure is discharged, and cooling wind is constantly heated, and is eventually formed high-temperature hot-air feeding boiler and is generated electricity, the slag particle post of cooling is sent into by belt
It is used for producing the adulterant that insulation material, light material or milling make cement industry in feed bin；
Described quick cooling tube is bilayer, and middle part is connected with cooling gas, and inwall, which is covered with, aperture, the liquid slag particle after being cut
Post, the cooling gas being ejected rapidly is cooled down, and makes slag particle post Surface hardened layer, to drop into during air-cooled cylinder, from each other not
It can stick together.
2. high-temperature liquid state slag heat energy extracting method according to claim 1, it is characterised in that：Branch's slag runner is in former slag
Set up separately on the basis of ditch.
3. high-temperature liquid state slag heat energy extracting method according to claim 1, it is characterised in that：In the row of branch's slag runner
Installed at material mouth and two slag chutes or slag ladle, the blast furnace red dregs liquid come through branch's slag runner are provided with below an oscillating chute, chute
By oscillating chute, it is assigned in two slag chutes in left and right or slag ladle.
4. high-temperature liquid state slag heat energy extracting method according to claim 1, it is characterised in that：Under described slag chute or slag ladle
There is slag-drip opening in portion, and equipped with slide gate nozzle, the off and on for controlling blast furnace red dregs liquid to flow out by slide gate nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511002486.3A CN105567891B (en) | 2015-12-28 | 2015-12-28 | A kind of high-temperature liquid state slag heat energy extracting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511002486.3A CN105567891B (en) | 2015-12-28 | 2015-12-28 | A kind of high-temperature liquid state slag heat energy extracting method |
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| Publication Number | Publication Date |
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| CN105567891A CN105567891A (en) | 2016-05-11 |
| CN105567891B true CN105567891B (en) | 2017-10-10 |
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| CN107916312B (en) * | 2017-11-15 | 2019-05-14 | 一重集团大连工程技术有限公司 | Steel slag dry process and waste heat recycling and electricity-generating method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SE429437B (en) * | 1976-10-12 | 1983-09-05 | Wurth Anciens Ets Paul | CONSTRUCTION AND PROCEDURE FOR TREATMENT AND HANDLING OF METAL SURGICAL Slag |
| CN101691620B (en) * | 2009-09-10 | 2011-06-08 | 河北理工大学 | Process and device for processing liquid steel slag |
| CN201999952U (en) * | 2011-03-11 | 2011-10-05 | 杭州锅炉集团股份有限公司 | Molten blast furnace slag high-temperature sensible heat recovery system |
| CN102424867B (en) * | 2011-12-31 | 2013-07-31 | 钢铁研究总院 | Slag granulating and waste heat recovery device |
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