CN107557532A - A kind of method for handling metallurgical dedusting ash - Google Patents
A kind of method for handling metallurgical dedusting ash Download PDFInfo
- Publication number
- CN107557532A CN107557532A CN201610504896.6A CN201610504896A CN107557532A CN 107557532 A CN107557532 A CN 107557532A CN 201610504896 A CN201610504896 A CN 201610504896A CN 107557532 A CN107557532 A CN 107557532A
- Authority
- CN
- China
- Prior art keywords
- ash
- dedusting ash
- molten iron
- zinc
- iron
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- 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 method for handling metallurgical dedusting ash,It is by weight percentage blast furnace dust 25% 45% by dedusting ash,Converter ash 15% 40%,Ore deposit groove ash 15% 40% is well mixed,KR standby feed bin is transported to 0.25 0.5MPa pressure by KR feeding systems,When molten iron temperature reaches 1,250 1500 DEG C,Desulfuration operations are carried out to molten iron,Dedusting ash compound is added in KR agitator tanks by desulfurization agent feeding device,Feed time 14 minutes,The addition control of dedusting ash compound is 1.5% the 3% of weight of molten iron,Stirred by agitating paddle in tank by 40 60rpm speed,Meet the thermodynamic and kinetic conditions needed for molten iron reduction reaction,Reduction is tapped a blast furnace and zinc,Zinc gasification enters flue gas dust collecting system and reclaimed,So as to realize effective processing of dedusting ash,Iron in recycled dust removing ashes,Remove the purpose of zinc,It is a kind of new method for handling dedusting ash.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 method for handling metallurgical dedusting ash.
Background technology
Steel plant's dirt mud waste material blast furnace gas mud, sack dust, revolving furnace mud etc. mix to form dirt sludge mixed material through making heap,
Dirt sludge mixed material participates in sintered material again.Wherein harmful substance zinc, alkali metal is not opened a way removal, but with useless
Material is circulated in sintering-blast furnace system, and the zinc, alkali metal content in waste material are continuously increased, to sintering production and
Blast furnace process brings a series of harm.The alkali metal compound too high levels such as K, Na in dedusting ash, can make
The dust granules ratio resistance increase of these submicron orders, so as to be difficult to be trapped by electric cleaner, holds near pole plate
Back corona phenomenon is also easy to produce, the efficiency of dust collection and operational stability of electric cleaner is significantly affected, causes electric precipitation to be arranged
Put flue gas dust concentration is exceeded and the increase of 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.
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
It is an object of the present invention to provide a kind of method for handling metallurgical dedusting ash, effectively solve prior art problem, return
The iron in waste material is received, removes harmful element zinc, removes the enormous expenditure of newly-built large scale equipment from, to handle dedusting ash
Open up a new route.
A kind of method for handling metallurgical dedusting ash, is blast furnace dust by weight percentage by dedusting ash
25%-45%, converter ash 15%-40%, ore deposit groove ash 15%-40% are well mixed, by KR feeding systems with
0.25-0.5MPa pressure is transported to KR standby feed bin, right when molten iron temperature reaches 1250-1500 DEG C
Molten iron carries out desulfuration operations, and dedusting ash compound is added in KR agitator tanks by desulfurization agent feeding device,
Feed time 1-4 minutes, the addition of dedusting ash compound control the 1.5%-3% in weight of molten iron, pass through tank
Middle agitating paddle is stirred by 40-60rpm speed, meets the thermodynamic and kinetic conditions needed for molten iron reduction reaction,
Realize short route recovery iron resource, remove Zn-ef ficiency.
By being examined to slag specimenization, the clearance of the iron resource rate of recovery and zinc is determined.
The present invention has advantageous effect in that compared with prior art：The present invention will not treatable dedusting containing zinc
The waste materials such as ash, blast furnace ash, steel-making bulk cargo dedusting ash add KR (KambaraReactor) processing, utilize KR
The mechanical agitation of sweetening process, molten iron is produced whirlpool, fully contacted with dedusting ash compound, meet that reduction is anti-
The dynamic conditions and thermodynamic condition answered, reduction is tapped a blast furnace and zinc, and zinc gasification enters flue gas dust collecting system and reclaimed,
So as to realize effective processing of metallurgical dedusting ash, iron in recycled dust removing ashes, the purpose for removing zinc, are a kind of places
Manage the new method of metallurgical dedusting ash.The iron resource rate of recovery is up to more than 95%, and zinc clearance is up to more than 95%.
The technology for throwing the high temperature furnaces such as huge fund newly-built rotary hearth furnace processing zinc-iron-containing dust mud is difficult to be received, and more highlights the present invention
Necessity.
Embodiment
Embodiment 1
Hot-metal bottle receives 150 tons of molten iron from blast furnace iron notch, is transported to desulfurization position.Used after metallurgical dedusting ash is mixed
KR feeding systems are transported to KR standby feed bin with 0.4MPa pressure, when molten iron temperature is 1280 DEG C,
Dedusting ash compound is added with the time of 3 minutes by desulfurization agent feeding device and amounts to 3 tons, accounts for weight of molten iron
2%, wherein 0.8 ton of blast furnace dust, 1.0 tons of converter ash, 1.2 tons of blast furnace ore tank ash.
It is added to above-mentioned in KR whipping process, mixing speed 40rpm, the iron resource rate of recovery 95%, zinc member
Plain clearance 95%.
Embodiment 2
Hot-metal bottle receives 170 tons of molten iron from blast furnace iron notch, is transported to desulfurization position, is used after metallurgical dedusting ash is mixed
KR feeding systems are transported to KR standby feed bin with 0.3MPa pressure, when molten iron temperature is 1300 DEG C,
Dedusting ash compound is added with the time of 1 minute by desulfurization agent feeding device and amounts to 2.55 tons, accounts for molten iron weight
Amount 1.5%, wherein 1.0 tons of blast furnace dust, 1.0 tons of converter ash, 0.55 ton of blast furnace ore tank ash.
It is added to above-mentioned in KR whipping process, mixing speed 50rpm, the iron resource rate of recovery 97%, zinc member
Plain clearance 95%.
Embodiment 3
Hot-metal bottle receives 200 tons of molten iron from blast furnace iron notch, is transported to desulfurization position, is used after metallurgical dedusting ash is mixed
KR feeding systems are transported to KR standby feed bin with 0.25MPa pressure, when molten iron temperature is 1350 DEG C,
Dedusting ash compound is added with the time of 4 minutes by desulfurization agent feeding device and amounts to 6 tons, accounts for weight of molten iron
3%, wherein 2.0 tons of blast furnace dust, 2.0 tons of converter ash, 2.0 tons of ore deposit groove ash.
It is added to above-mentioned in KR whipping process, mixing speed 60rpm, the iron resource rate of recovery 98%, zinc member
Plain clearance 97%.
Embodiment 4
Hot-metal bottle receives 210 tons of molten iron from blast furnace iron notch, is transported to desulfurization position, is used after metallurgical dedusting ash is mixed
KR feeding systems are transported to KR standby feed bin with 0.5MPa pressure, when molten iron temperature is 1450 DEG C,
Dedusting ash compound is added with the time of 1 minute by desulfurization agent feeding device and amounts to 3.78 tons, accounts for molten iron weight
Amount 1.8%, wherein 1.5 tons of blast furnace dust, 1.3 tons of converter ash, 0.98 ton of ore deposit groove ash.
It is added to above-mentioned in KR whipping process, mixing speed 50rpm, the iron resource rate of recovery 96%, zinc member
Plain clearance 95%.
Claims (1)
- A kind of 1. method for handling metallurgical dedusting ash, it is characterised in that be blast furnace by weight percentage by dedusting ash Gas ash 25%-45%, converter ash 15%-40%, ore deposit groove ash 15%-40% are well mixed, and pass through KR feedings System is transported to KR standby feed bin with 0.25-0.5MPa pressure, when molten iron temperature reaches 1250-1500 DEG C when, to molten iron carry out desulfuration operations, dedusting ash compound is added to KR by desulfurization agent feeding device and stirred To mix in tank, feed time 1-4 minutes, the addition of dedusting ash compound controls the 1.5%-3% in weight of molten iron, Stirred by agitating paddle in tank by 40-60rpm speed, meet the thermodynamics and power needed for molten iron reduction reaction Condition, realize short route recovery iron resource, remove Zn-ef ficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610504896.6A CN107557532A (en) | 2016-06-30 | 2016-06-30 | A kind of method for handling metallurgical dedusting ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610504896.6A CN107557532A (en) | 2016-06-30 | 2016-06-30 | A kind of method for handling metallurgical dedusting ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107557532A true CN107557532A (en) | 2018-01-09 |
Family
ID=60968913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610504896.6A Pending CN107557532A (en) | 2016-06-30 | 2016-06-30 | A kind of method for handling metallurgical dedusting ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107557532A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111154946A (en) * | 2020-01-03 | 2020-05-15 | 大连环球矿产股份有限公司 | Multi-element premelted refining slag and production method and production device thereof |
| CN111647697A (en) * | 2020-06-04 | 2020-09-11 | 北京首钢股份有限公司 | Energy-saving treatment method for steelmaking refining fly ash and product thereof |
Citations (2)
| 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 |
-
2016
- 2016-06-30 CN CN201610504896.6A patent/CN107557532A/en active Pending
Patent Citations (2)
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 冯聚和等: "《铁水预处理与钢水炉外精炼》", 30 June 2006 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111154946A (en) * | 2020-01-03 | 2020-05-15 | 大连环球矿产股份有限公司 | Multi-element premelted refining slag and production method and production device thereof |
| CN111647697A (en) * | 2020-06-04 | 2020-09-11 | 北京首钢股份有限公司 | Energy-saving treatment method for steelmaking refining fly ash and product thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Pyrometallurgical recovery of zinc and valuable metals from electric arc furnace dust–a review | |
| CN104911356B (en) | A kind of solid waste gas ash, the comprehensive recycling process of vanadium slag containing zinc-iron | |
| CN112442589B (en) | Method and system for co-processing waste incineration fly ash and zinc-containing dust and mud of iron and steel plant | |
| CN105296694B (en) | A kind of agglomerates such as carbon containing iron zinc are reduced into the processes such as molten iron, zinc for iron storing type main channel of blast furnace | |
| CN203728902U (en) | Integrated solid waste gas ash and zinc-containing ferrovanadium slag recovery device | |
| CN102766718B (en) | Method for producing sponge iron and zinc-rich materials by blast furnace zinc-containing ash | |
| CN106148728B (en) | A method of a variety of hazardous wastes containing zinc are disposed simultaneously using rotary kiln device | |
| CN103468848B (en) | Method for treating high-iron red mud with high-temperature iron bath | |
| CN105695735A (en) | Self-reduction utilization process for steel rolling oily sludge and blast furnace gas dust | |
| CN114672643B (en) | Method for synergistically utilizing high-iron red mud and molten steel slag | |
| CN106480310A (en) | A kind of alkali-metal method in removing metallurgical dust sludge | |
| CN102719575B (en) | Converter slag modifier and manufacture and using method thereof | |
| CN107151741A (en) | A kind of system and method for handling lead and zinc smelting dreg | |
| Singh et al. | Recycling of Basic Oxygen Furnace (BOF) sludge in iron and steel works | |
| CN103952540B (en) | Ion dust mud contaning and high silicon iron concentrate is utilized to produce the technique of prereduced burden | |
| CN103990634B (en) | Recovery method for electronic waste and waste lead-acid cells | |
| CN105838839B (en) | It prepares the method for granulated iron and prepares the system of granulated iron | |
| CN102839281A (en) | Method of producing titanium-bearing metallic pellets used for protecting blast furnace with rotary hearth furnace through direct reduction | |
| CN106148682A (en) | Process the method and system of zinc leaching residue | |
| CN106119530A (en) | Process the method and system of zinc kiln slag | |
| CN100374587C (en) | Method for reduction treatment of metal oxide or ironmaking waste, and method for concentration and/or recovery of zinc and/or lead | |
| CN107557532A (en) | A kind of method for handling metallurgical dedusting ash | |
| CN115716738B (en) | Production process of high-strength steel slag brick | |
| CN101818264B (en) | Method for treating zinc-iron-containing dust and sludge | |
| CN107523691A (en) | A kind of method that valuable metal is extracted from industrial produced wastes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180109 |