CN107400742A - A kind of blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process - Google Patents
A kind of blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process Download PDFInfo
- Publication number
- CN107400742A CN107400742A CN201610334457.5A CN201610334457A CN107400742A CN 107400742 A CN107400742 A CN 107400742A CN 201610334457 A CN201610334457 A CN 201610334457A CN 107400742 A CN107400742 A CN 107400742A
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- China
- Prior art keywords
- slag
- waste heat
- blast furnace
- comprehensive utilization
- dry method
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
-
- 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
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides a kind of blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process, comprise the following steps：S1, blast-furnace slag enter surge tank by dry slag runner, are reduced in surge tank by the heat of sirocco reclamation clinker, slag temperature；S2, the flue gas for being loaded with heat of slags enter waste heat boiler by pipeline, electric energy are converted into generating equipment by heat exchange water vapour, water vapour in waste heat boiler；S3, the flue gas after heat exchange enter deduster dedusting, are discharged after dedusting by blower fan into diffusing tower；S4, the clinker after temperature reduces enters casting brick chain belt casting, subsequently into cold bed packing and storing.Blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process provided by the invention has security, reliability, stability, benefit, is realizing melting slag waste heat recovery simultaneously, is creating economic benefit.
Description
Technical field
The present invention relates to process for making, and in particular to a kind of blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization
Technique.
Background technology
The composition of clinker：Blast furnace slag is mainly by acidic oxide SiO2、Al2O3With basic anhydride CaO, MgO4Kind composition
Composition.In the case where smelting conversion pig with common iron ore, this 4 kinds of composition sums separately have a small amount of more than 95%
FeO, MnO and sulfide (CaS, MnS etc.).When smelting special ore, also contain other compositions in clinker.For example, smelting
During PZH vanadic-titanomagnetite, 20%~30%TiO is contained in clinker2(see the blast furnace process of vanadium titano-magnetite)；Contain in smelting
During fluorine ore, contain 18% or so CaF in clinker (see the blast furnace process of baiyuneboite)；In ferromanganese smelting, in clinker
Contain higher MnO.
Blast furnace cinder processing method is broadly divided into：Go out dry slag and Water Quenching Slag, because dry Slag treatment method causes environmental pollution
It is more serious, and resource utilization is low, has been rarely employed now, general, in accident treatment, sets dry pit or slag ladle to go out
Slag；At present, blast furnace cinder processing is main use Water Quenching Slag technique, and grain slag can be used as cement raw material, or for manufacturing slag brick, gently
Matter concrete segment, is reasonably utilized resource.
Existing to use Water Quenching Slag technique, a large amount of heat energy are forced to be converted into vapor release in slag, and technique floor space is huge
Greatly, resources loss is serious, and comprehensive utilization is restricted；Molten slag contains heat energy and becomes steam (low pressure waste hot gas), big calorimetric
It can slattern；Slag changes original slag and is transported to as containing slugging of quenching, and containing a large amount of water 10-20% are carried because of water punching
Downstream user.
The content of the invention
For the drawbacks described above and problem of prior art, the invention provides a kind of brand-new slag dry process, have
Many-sided advantages such as energy-saving and emission-reduction, environment protection standard, economic benefit lifting.
In order to achieve the above object, the present invention provides following technical scheme：
Blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process, comprises the following steps：S1, blast-furnace slag lead to
Overdrying slag runner enters surge tank, is reduced in surge tank by the heat of sirocco reclamation clinker, slag temperature；S2, it is loaded with clinker
The flue gas of heat enters waste heat boiler by pipeline, and by heat exchange water vapour in waste heat boiler, water vapour, which enters, to generate electricity
Equipment is converted to electric energy；S3, the flue gas after heat exchange enter deduster dedusting, are discharged after dedusting by blower fan into diffusing tower；S4,
Clinker after temperature reduces enters casting brick chain belt casting, subsequently into cold bed packing and storing.
In above-mentioned technical proposal, in step s 2, the flue-gas temperature for being loaded with heat of slags is 1350-1450 DEG C.
In above-mentioned technical proposal, in step s 2, the flue-gas temperature after heat exchange is 160-200 DEG C.
In above-mentioned technical proposal, in step s3, the dust content after dedusting drops to 20mg/m3Below.
In above-mentioned technical proposal, in step S3 and S4, after bag-type dust, the dustiness of flue gas is less than or equal to flue gas
30mg/m3。
In above-mentioned technical proposal, in step s3, blower fan is also successively provided between sack cleaner and gas cooler
And three-way switch valve, the CO retracting devices in step S4 connect with three-way switch valve.
In above-mentioned technical proposal, in step s 4, blower fan is provided between sack cleaner and CO retracting devices.
In above-mentioned technical proposal, in step s3, gas cooler is does not spray water gas cooler, and gas cooler is by coal
Gas is down to less than 70 DEG C from 150 DEG C, and the water in gas cooler is raised to 80-90 DEG C from 20 DEG C, and hot water delivers to evaporated flue, realizes
Waste heat recovery.
Blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process provided by the invention compared with current technology,
Show that many-sided advantage, the blast furnace cinder process resource benefits such as energy-saving and emission-reduction, environment protection standard, economic benefit lifting obtain maximum
Change and utilize.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the schematic diagram of blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process.
Embodiment
Below in conjunction with the accompanying drawing of the present invention, technical scheme is clearly and completely described, it is clear that institute
The embodiment of description is only part of the embodiment of the present invention, rather than whole embodiments.Based on the implementation in the present invention
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, is belonged to
The scope of protection of the invention.
According to Fig. 1, work is comprehensively utilized as the blast furnace ironmaking slag dry method Slag treatment waste heat recovery shown in embodiment
Skill comprises the following steps：
S1, blast-furnace slag enter surge tank by dry slag runner, pass through the heat of sirocco reclamation clinker, clinker in surge tank
Temperature reduces；
S2, the flue-gas temperature for being loaded with heat of slags is 1350-1450 DEG C, and flue gas enters waste heat boiler by pipeline, remaining
Electric energy is converted into generating equipment by heat exchange water vapour, water vapour in heat boiler；
S3, the flue-gas temperature after heat exchange is 160-200 DEG C, and flue gas enters deduster dedusting, the dust content after dedusting
Drop to 20mg/m3Hereinafter, discharged after dedusting by blower fan into diffusing tower；
S4, the clinker after temperature reduces enters casting brick chain belt casting, subsequently into cold bed packing and storing.
The recovery dust collecting process process has the characteristics that：
1st, 1350~1450 DEG C of high-temperature flue gas are converted into Steam Recovery：
2nd, slag is without water quenching
3rd, water-spraying control, flue gas are not pure dry flue gas to flue gas；
4th, flue gas ash removal is dry method refined dedusting：
Verified through work cardinal number theory：
1350~1450 DEG C of high-temperature flue gas, which can be achieved on not spray water, drops to 200 DEG C or so；Fume afterheat is converted into steaming
Vapour recovery generates electricity；, can be with peace and quiet heat exchanger tube dust stratification, flue gas using automatic ash removing containing micro dust high-temperature flue gas through waste heat boiler
Passage does not block up, and has reliability；Flue gas because of the particularity of special waste heat boiler structure, will not explode through waste heat boiler, have peace
Quan Xing, patent of invention of the waste heat boiler at us《Steelmaking converter flue gas pure dry dust removing and synchronous energy recovery technique and waste heat
Boiler》System introduction was made in (patent No. ZL201010603498.2)；The mechanical periodicity of flue gas, it is special due to taking
Structure ensures steam/water circulating, and waste heat boiler operation has stability.
Due to not using water punching cooling process, slag is effectively reclaimed the present invention in cooling stage high temperature, conversion
For heat energy steam is produced through (waste heat boiler).The techniques such as the buffered tank constant temperature agitating and heating increase additive of slag, uniformly casting
Construction material is made in shaping (brick, special cylinder etc.), is adapted to many places such as urban construction to use, and high-temperature flue gas is cooled down through boiler, done
Method dedusting, blower fan to diffusing tower are discharged, and this apparatus and process, which becomes, to be wasted to reclaim precious resources.
Smoke heat energy is changed into Steam Recovery, and steam can generate electricity, and the special brickmaking of slag meets new city road at a high speed
Illuminator, wear-resisting long-life attractive in appearance use, and lifting by-product value, process discharge optimization meets national environmental protection new policy.Due to
Water quenching punching water, vapor release and slag is not used to carry water etc., water saving also complies with National Environmental and administers policy.
Blast furnace cinder dry process provided by the invention and waste heat recovery residue product recycle process, caused high-temperature flue gas
Combustion explosion does not occur in waste heat boiler, operation is unobstructed, so as to expendable in domestic and international conventional process method at present
1350~1450 DEG C of high-temperature flue gas carries out the synchronous energy recovery of dry method cooling and recycled, while fume environment protection discharges.
The present invention and grain slag handling process performance parameter Efficiency Comparison table (pressing 1000M3 levels blast furnace)
Using above-mentioned technique, environment protection standard is realized, and high benefit reclaims, and is adapted to iron and steel enterprise's Energy-saving Projects.This technique
With security, reliability, stability, benefit, realizing melting slag waste heat recovery simultaneously, creating economic benefit.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should it is described using scope of the claims as
It is accurate.
Claims (4)
1. blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process, it is characterised in that comprise the following steps：
S1, blast-furnace slag enter surge tank by dry slag runner, pass through the heat of sirocco reclamation clinker, slag temperature in surge tank
Reduce；
S2, the flue gas for being loaded with heat of slags enter waste heat boiler by pipeline, by heat exchange water vapour in waste heat boiler,
Water vapour is converted to electric energy into generating equipment；
S3, the flue gas after heat exchange enter deduster dedusting, are discharged after dedusting by blower fan into diffusing tower；
S4, the clinker after temperature reduces enters casting brick chain belt casting, subsequently into cold bed packing and storing.
2. blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process according to claim 1, its feature exist
In in step s 2, the flue-gas temperature for being loaded with heat of slags is 1350-1450 DEG C.
3. blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process according to claim 1, its feature exist
In in step s 2, the flue-gas temperature after heat exchange is 160-200 DEG C.
4. blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process according to claim 1, its feature exist
In in step s3, the dust content after dedusting drops to 20mg/m3Below.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610334457.5A CN107400742A (en) | 2016-05-20 | 2016-05-20 | A kind of blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610334457.5A CN107400742A (en) | 2016-05-20 | 2016-05-20 | A kind of blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process |
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| CN107400742A true CN107400742A (en) | 2017-11-28 |
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| CN201610334457.5A Pending CN107400742A (en) | 2016-05-20 | 2016-05-20 | A kind of blast furnace ironmaking slag dry method Slag treatment waste heat recovery comprehensive utilization process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108531671A (en) * | 2018-06-29 | 2018-09-14 | 四川川润股份有限公司 | A kind of blast furnace cinder solid dielectric heat exchange recycling and comprehensive utilization process method and outfit |
| CN113699287A (en) * | 2021-09-02 | 2021-11-26 | 南京华电节能环保股份有限公司 | Blast furnace slag dry processing device based on high-temperature slag waste heat recovery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975117A (en) * | 2015-07-15 | 2015-10-14 | 南京凯盛开能环保能源有限公司 | Blast furnace slag overall treatment and sensible heat recovery power generation system and method |
| CN205115504U (en) * | 2015-11-04 | 2016-03-30 | 中冶东方工程技术有限公司秦皇岛研究设计院 | High slag dry process granulation and heat recovery system |
-
2016
- 2016-05-20 CN CN201610334457.5A patent/CN107400742A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975117A (en) * | 2015-07-15 | 2015-10-14 | 南京凯盛开能环保能源有限公司 | Blast furnace slag overall treatment and sensible heat recovery power generation system and method |
| CN205115504U (en) * | 2015-11-04 | 2016-03-30 | 中冶东方工程技术有限公司秦皇岛研究设计院 | High slag dry process granulation and heat recovery system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108531671A (en) * | 2018-06-29 | 2018-09-14 | 四川川润股份有限公司 | A kind of blast furnace cinder solid dielectric heat exchange recycling and comprehensive utilization process method and outfit |
| CN113699287A (en) * | 2021-09-02 | 2021-11-26 | 南京华电节能环保股份有限公司 | Blast furnace slag dry processing device based on high-temperature slag waste heat recovery |
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