CN107557532A - Method for treating metallurgical dust removal ash - Google Patents
Method for treating metallurgical dust removal 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
- molten iron
- dedusting ash
- 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
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000428 dust Substances 0.000 title abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 90
- 229910052742 iron Inorganic materials 0.000 claims abstract description 45
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 13
- 230000023556 desulfurization Effects 0.000 claims abstract description 11
- 238000011084 recovery Methods 0.000 claims abstract description 10
- 238000006722 reduction reaction Methods 0.000 claims abstract description 9
- 150000001875 compounds Chemical class 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000035611 feeding Effects 0.000 claims 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 23
- 229910052725 zinc Inorganic materials 0.000 abstract description 23
- 239000011701 zinc Substances 0.000 abstract description 23
- 238000002156 mixing Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003546 flue gas Substances 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 abstract 3
- 238000004064 recycling Methods 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 34
- 238000005516 engineering process Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001698 pyrogenic effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 150000001339 alkali metal compounds Chemical class 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for treating metallurgical dedusting ash, which comprises the steps of uniformly mixing 25-45 wt% of dedusting ash, 15-40 wt% of converter ash and 15-40 wt% of ore tank ash, conveying the dedusting ash to a KR standby bin through a KR feeding system under the pressure of 0.25-0.5MPa, carrying out desulfurization operation on molten iron when the temperature of the molten iron reaches 1250-1500 ℃, adding the dedusting ash mixture into a KR stirring tank through a desulfurizer feeding device for 1-4 minutes, controlling the adding amount of the dedusting ash mixture to be 1.5-3 wt% of the molten iron, stirring the mixture by a stirring paddle in the tank at the speed of 40-60rpm, meeting thermodynamic and kinetic conditions required by reduction reaction of the molten iron, reducing iron and zinc, gasifying the zinc, recycling the zinc in a flue gas dedusting system, thereby realizing effective treatment of the dedusting ash, the purpose of recovering iron and removing zinc in the dust is a new method for treating the dust. The recovery rate of iron resources can reach more than 95 percent, and the removal rate of zinc can reach more than 95 percent.
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 | Method for treating metallurgical dust removal ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610504896.6A CN107557532A (en) | 2016-06-30 | 2016-06-30 | Method for treating metallurgical dust removal 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 | Method for treating metallurgical dust removal 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 | Recovery processing method of zinc-containing and iron-containing dust and mud |
| CN102031361A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Comprehensive treatment and utilization method of iron and steel dust and mud |
-
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 | Recovery processing method of zinc-containing and iron-containing dust and mud |
| CN102031361A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Comprehensive treatment and utilization method of iron and steel dust and mud |
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 |
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| 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 |