CN107557575A - A kind of technique for handling metallurgical dust sludge waste material - Google Patents
A kind of technique for handling metallurgical dust sludge waste material Download PDFInfo
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- CN107557575A CN107557575A CN201610503711.XA CN201610503711A CN107557575A CN 107557575 A CN107557575 A CN 107557575A CN 201610503711 A CN201610503711 A CN 201610503711A CN 107557575 A CN107557575 A CN 107557575A
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- waste material
- metallurgical dust
- dust sludge
- iron
- sludge waste
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of technique for handling metallurgical dust sludge waste material, by the metallurgical dust sludge waste material that mass fraction is 75~90 parts, add the binding agent that mass fraction is 10~25 parts, agglomerate is pressed into through pressure forming machine, it is added directly into by hopper in KR stirrings, when molten iron temperature reaches 1,250 1500 DEG C, the 60rpm of mixing speed 40, the addition of agglomerate is controlled the 1.5%~3% of weight of molten iron, realize short route recovery iron resource, remove Zn-ef ficiency, so as to realize effective processing of metallurgical dust sludge waste material, reclaim the iron in metallurgical dust sludge, remove the purpose of zinc.The iron resource rate of recovery is up to more than 95%, and zinc clearance is up to more than 95%.
Description
Technical field
The invention belongs to metallurgical waste processing technology field, more particularly to a kind of work for handling metallurgical dust sludge waste material
Skill.
Background technology
At present, the metallurgical waste such as blast furnace gas mud, sack dust, revolving furnace mud mixes through making heap to form metallurgical dust sludge and mix
Material is closed, metallurgical dust sludge compound participates in sintered material again.Sintering, blast furnace harmful substance zinc, alkali gold in waste material
Category removes without open circuit, but is circulated with waste material in sintering-blast furnace system, and the zinc, alkali metal in waste material contain
Amount is continuously increased, and causes zinc and alkali metal to bring one to sintering production and blast furnace process in blast furnace circulating enrichment
The harm of series.The alkali metal compound too high levels such as K, Na in dedusting ash, can make these submicron orders
Dust granules ratio resistance increases, and so as to be difficult to be trapped by electric cleaner, easily generation inverse corona shows near pole plate
As significantly affecting the efficiency of dust collection and operational stability of electric cleaner, causing the dust of electric precipitation discharge flue gas dense
Spend the increase of exceeded and plant running energy consumption.
The content of harmful substance zinc is higher in ion dust mud contaning, it is impossible to directly utilizes, it is necessary to which zinc therein etc. is carried out
Recovery or Passivation Treatment, otherwise must seal and be deposited in specified place.Up to the present, the iron content dirt developed
The method of zinc recovering mainly has Physical, wet method and pyrogenic process in mud.What use was more at present is pyrogenic attack,
Including rotary hearth furnace technology, rotary kiln technology and shaft furnace (melting) reduction technique etc..But have some drawbacks,
Rotary hearth furnace owned by France in direct-reduction is that ion dust mud contaning is made into green pellets by grinding mill, mixer, pelletizer,
DRI is made by returning rotary hearth furnace, is utilized as steelmaking feed.The U.S., Germany, day at present
This grade state smelter uses this technology.Domestic Ma Gang, day steel, Sha Gang, Laigang etc. use domestic independent development
Or introduce the modes such as key equipment from foreign countries and built up rotary hearth furnace processing zinc-containing dust production line；Rotary kiln technology is
The agglomerate (pelletizing) of high intensity is made, on drying grate in dust addition binding agent on a tinuous production
After (dry kiln) is dried, reenter in rotary kiln below 1100 DEG C, the kiln discharge after 8-10h completes reduction reaction.
The enterprise such as VAI, SUMITOMO CHEMICAL metal uses the technology at present；Shaft furnace (melting) reduction technique, is similar to
Blast furnace, master operation include batch mixing, briquetting, dispensing, addition coke and smelt and come out of the stove.After reaching smelting cycle,
Pelletizing directly feeds ironmaking or molten iron directly feeds steel making working procedure, and the grain slag of discharge fills into blast-furnace cinder superfine powder
Put and be processed into cement raw material.The technology is pushed away in Germany, Japan, India and Taiyuan Iron and Steel Co. (700,000,000 yuan of investment)
Wide application.
Pyrogenic attack does not match with iron and steel enterprise existing process equipment, is required for building for wide place and several hundred million members
If investment, investment length return period, technique is also relative complex, and treatment process unit is more, longer；Equipment is tieed up
Shield and operating cost are high, and such as 12000 square metres of rotary hearth furnace construction occupation of land, 300,000,000 yuan of investment, shaft furnace construction are taken up an area
15000 square metres, investment 700,000,000；Need outer supplying heat source (high heating value gas heating, electrical heating, hot blast etc.)；
Need to add fuel and higher to fuel and ingredient requirement, it is desirable to which fine size, coal ash fusion temperature are high；Shaft furnace fusion method
Smelter coke is also needed to, and zinc is still in stove circulating enrichment.
The content of the invention
Effectively to solve prior art problem, the present invention provides a kind of technique for handling metallurgical dust sludge waste material, will not
The waste materials such as treatable Zinc-Bearing Wastes, LF slags, steel-making bulk cargo dedusting ash, iron scale add KR
(KambaraReactor) handle, using KR mechanical agitation, molten iron is produced whirlpool, make molten iron and dirt
Mud fully contacts, and meets the dynamic conditions and thermodynamic condition of reduction reaction, and reduction is tapped a blast furnace and zinc, zinc gasification
Reclaimed into flue gas dust collecting system, so as to the purpose realized the iron in recovery dirt mud, remove zinc.Remove from newly-built big
The enormous expenditure of type equipment, a new route is opened up for processing metallurgical dust sludge waste material.
Because the granularity of metallurgical dust sludge waste material (waste material such as clinker, iron sheet) is larger, and desulfuration injection feeding device
Pipeline is thinner, therefore directly can not be fed using existing desulfurizing agent blowing device, and we are by waste material by certain
Ratio mixing, cold pressing balling-up, then be added directly into by hopper in KR stirring desulphurization tanks.The present invention is by metallurgy
Dirt mud waste material mass fraction is 75~90 parts, the binding agent that mass fraction is 10~25 parts is added, through pressure forming
Machine is pressed into agglomerate, and when molten iron temperature reaches 1250-1500 DEG C, KR stirrings are added directly into by hopper
In, the control of the addition of agglomerate is realized short route recovery iron resource, removed the 1.5%~3% of weight of molten iron
Zn-ef ficiency.
The metallurgical dust sludge waste material includes but are not limited to：Blast furnace gas mud (ash), revolving furnace mud (ash), LF
Steel plant's iron content such as clinker and iron scale is containing 2~3 kinds in Zn scrap returns.
The binding agent is：Waterglass or bentonite.
The pressure forming machine pressure is 100~300 tons.
The present invention has advantageous effect in that compared with prior art：The present invention is by metallurgical dust sludge waste material and bonding
Agent mixes by a certain percentage, is molded through pressure forming machine, is added in KR stirrings, molten iron is produced whirlpool,
Meet the dynamic conditions and thermodynamic condition of reduction reaction, reduction is tapped a blast furnace and zinc, and zinc gasification enters flue gas ash removal
System reclaims, and so as to realize effective processing of metallurgical dust sludge waste material, reclaims the iron in metallurgical dust sludge, removes zinc
Purpose.The iron resource rate of recovery is up to more than 95%, and zinc clearance is up to more than 95%.
Embodiment
Embodiment 1
Agglomerate is made up of following compositions by mass fraction：
25 parts of blast furnace gas mud, 25 parts of revolving furnace mud, 25 parts of iron scale, 25 parts of waterglass.
By 3.6 tons of above-mentioned compounds, (180 tons of molten steel, 2%) compound, which accounts for, to be well mixed, through cold moudling
Machine is compressing under 100 tons of pressure to be made agglomerate, straight by hopper when molten iron temperature reaches 1300 DEG C
Connect and be added in KR whipping process, mixing speed 40rpm, the iron resource rate of recovery 95%, Zn-ef ficiency clearance
95%.
Embodiment 2
Agglomerate is made up of following compositions by mass fraction：
30 parts of blast furnace dust, 25 parts of converter ash, 30 parts of iron scale, 15 parts of bentonite.
By 3.0 tons of above-mentioned compounds, (200 tons of molten steel, 1.5%) compound, which accounts for, to be well mixed, through cold moudling
Machine is compressing under 150 tons of pressure to be made agglomerate, straight by hopper when molten iron temperature reaches 1280 DEG C
Connect and be added in KR whipping process, mixing speed 50rpm, the iron resource rate of recovery 98%, Zn-ef ficiency clearance
96%.
Embodiment 3
Agglomerate is made up of following compositions by mass fraction：
25 parts of blast furnace gas mud, 15 parts of LF clinkers, 40 parts of iron scale, 20 parts of waterglass.
By 4.0 tons of above-mentioned compounds, (160 tons of molten steel, 2.5%) compound, which accounts for, to be well mixed, through cold moudling
Machine is compressing under 200 tons of pressure to be made agglomerate, straight by hopper when molten iron temperature reaches 1320 DEG C
Connect and be added in KR whipping process, mixing speed 40rpm, the iron resource rate of recovery 97%, Zn-ef ficiency clearance
97%.
Embodiment 4
Agglomerate is made up of following compositions by mass fraction：
35 parts of revolving furnace mud, 40 parts of iron scale, 25 parts of bentonite.
By 4.5 tons of above-mentioned compounds, (150 tons of molten steel, 3.0%) compound, which accounts for, to be well mixed, through cold moudling
Machine is compressing under 250 tons of pressure to be made agglomerate, straight by hopper when molten iron temperature reaches 1450 DEG C
Connect and be added in KR whipping process, mixing speed 60rpm, the iron resource rate of recovery 97%, Zn-ef ficiency clearance
95%.
Claims (4)
1. a kind of technique for handling metallurgical dust sludge waste material, it is characterised in that by the smelting that mass fraction is 75~90 parts
Golden dirt mud waste material, the binding agent that mass fraction is 10~25 parts is added, agglomerate is pressed into through pressure forming machine, is led to
Hopper is crossed to be added directly into KR stirrings, when molten iron temperature reaches 1250-1500 DEG C, mixing speed 40-60
Rpm, the addition control of agglomerate are realized short route recovery iron resource, gone the 1.5%~3.0% of weight of molten iron
Except Zn-ef ficiency.
2. a kind of technique for handling metallurgical dust sludge waste material according to claim 1, it is characterised in that described
Metallurgical dust sludge waste material includes the steel plant of blast furnace gas mud or ash, revolving furnace mud or ash, LF clinkers and iron scale
Iron content is containing 2~3 kinds in Zn scrap returns.
3. a kind of technique for handling metallurgical dust sludge waste material according to claim 1, it is characterised in that described
Binding agent is：Waterglass or bentonite.
4. a kind of technique for handling metallurgical dust sludge waste material according to claim 1, it is characterised in that described
Pressure forming machine pressure is 100~300 tons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610503711.XA CN107557575A (en) | 2016-06-30 | 2016-06-30 | A kind of technique for handling metallurgical dust sludge waste material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610503711.XA CN107557575A (en) | 2016-06-30 | 2016-06-30 | A kind of technique for handling metallurgical dust sludge waste material |
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| CN107557575A true CN107557575A (en) | 2018-01-09 |
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| CN201610503711.XA Pending CN107557575A (en) | 2016-06-30 | 2016-06-30 | A kind of technique for handling metallurgical dust sludge waste material |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818263A (en) * | 2009-02-27 | 2010-09-01 | 鞍钢股份有限公司 | Method for reclaiming zinc-iron-containing dust and sludge |
| CN102031361A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Method for comprehensively treating and utilizing dust sludge |
| CN103160302A (en) * | 2011-12-14 | 2013-06-19 | 鞍钢股份有限公司 | Processing method of metallurgical dust mud containing iron carbon zinc |
| CN104694758A (en) * | 2015-03-13 | 2015-06-10 | 宝钢发展有限公司 | Technique for comprehensively utilizing iron-containing dust mud |
| CN104789759A (en) * | 2014-01-16 | 2015-07-22 | 河南省远征冶金科技有限公司 | Metallurgical iron-containing powder material resource utilization method |
| CN106148711A (en) * | 2015-04-19 | 2016-11-23 | 王虎 | A kind of metallurgical dust sludge simple and effective process technique |
-
2016
- 2016-06-30 CN CN201610503711.XA patent/CN107557575A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818263A (en) * | 2009-02-27 | 2010-09-01 | 鞍钢股份有限公司 | Method for reclaiming zinc-iron-containing dust and sludge |
| CN102031361A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Method for comprehensively treating and utilizing dust sludge |
| CN103160302A (en) * | 2011-12-14 | 2013-06-19 | 鞍钢股份有限公司 | Processing method of metallurgical dust mud containing iron carbon zinc |
| CN104789759A (en) * | 2014-01-16 | 2015-07-22 | 河南省远征冶金科技有限公司 | Metallurgical iron-containing powder material resource utilization method |
| CN104694758A (en) * | 2015-03-13 | 2015-06-10 | 宝钢发展有限公司 | Technique for comprehensively utilizing iron-containing dust mud |
| CN106148711A (en) * | 2015-04-19 | 2016-11-23 | 王虎 | A kind of metallurgical dust sludge simple and effective process technique |
Non-Patent Citations (1)
| Title |
|---|
| 冯聚和: "《铁水预处理与钢水炉外精炼》", 30 June 2006, 冶金工业出版社 * |
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Application publication date: 20180109 |