CN109092844B - Steel slag multistage treatment method - Google Patents
Steel slag multistage treatment method Download PDFInfo
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- CN109092844B CN109092844B CN201810653120.XA CN201810653120A CN109092844B CN 109092844 B CN109092844 B CN 109092844B CN 201810653120 A CN201810653120 A CN 201810653120A CN 109092844 B CN109092844 B CN 109092844B
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- steel slag
- slag
- steel
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- multistage treatment
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- 239000002893 slag Substances 0.000 title claims abstract description 109
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 106
- 239000010959 steel Substances 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000007885 magnetic separation Methods 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- 238000005453 pelletization Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 5
- 238000006467 substitution reaction Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000004570 mortar (masonry) Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 description 20
- 230000008901 benefit Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000006148 magnetic separator Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241000287828 Gallus gallus Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000003701 mechanical milling Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000004155 tailings processing Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Food Science & Technology (AREA)
- Furnace Details (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides a kind of steel slag multistage treatment method, including the broken, screening and magnetic separation recycled to steel slag, finally obtains the tailings of the iron powder of TFe>60% and MFe<1%.Ground slag can be with raw material of the substitution sandstone aggregate as roadbed bed course, steady layer of water etc., as quotient's concrete and mortar；Perhaps as auxiliary material production pelletizing or as mixture bundled scrap.Reach metal recovery rate > 99% or more, is truly realized zero-emission.
Description
Technical field
The present invention relates to the method flows of the comprehensive utilization to smelting waste steel, and in particular to a kind of steel slag multistep treatment side
Method.
Background technique
Steel slag is main solid waste in steel-making link, is calculated according to 800,000,000 tons of national steel production capacity, generates refining now
1.2 hundred million tons of steel class steel slag.But country's process for treating steel slag is simple, extensive；After generally going through bored heat, cooling, decomposing, sort out
Diameter big steel scrap and magnetic separation；The tailings left accounts for 80% or more of processing total amount in 20mm or more.Because without sufficiently broken
It is broken, still containing 4% or so fe, more person's contents are even more than 5% or more.Moreover, there are serious cinder ladles for the tailings left
The problem of iron, slag iron solidification；Because of the limitation of domestic technique level, this part tailings, which continues processing, can not create economic value,
The cost bottleneck of existing method is reached, has become " chicken ribs ".
Even if because sorting, not clean, particle is uneven, standard not first-class factor too high downstream links by these tailings export trades
Cost causes sales difficulty.Sometimes upstream will also undertake freight charges and stockpiling cost, and tailings is sent to downstream client；It causes
Secondary processing cost is high, sells the problems such as unstable, secondary pollution is serious.
Known country encourages the raw materials such as the renewable resources such as steel slag substitution sandstone, cement, and Current Domestic processing is comprehensive
Technical comparing is closed to fall behind.So steel slag multistage treatment method is the production factors that industry needs.
Through retrieving, Chinese patent literature CN107159426A discloses that a kind of steel slag is secondary to select iron method, uses reciprocating sieve
Select machine, jaw crusher, barrel magnetic separator, spiral magnetic separator, ball mill and magnetic wind joint iron dressing machine composition multiple stage crushing and magnetic
The system of choosing for improving the steel slag iron-content in mechanical milling process, and then reduces ore grinding power consumption, reduces the workload of ball mill
And wear intensity, meet the sorting requirement of different grain size slag steel.However this method is only paid attention to select Iron grade from powder to be 60%
Above granulated iron powder not yet realizes the comprehensive utilization to steel slag.
The steel slag multistage treatment method of fragrant steel research and development aims to solve the problem that above-mentioned main problem, is created by the comprehensive utilization of steel slag
Make economic value and social benefit.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of efficient, energy conservation, low emission
Steel slag multistage treatment method.
Technical solution: in order to solve the above technical problems, a kind of steel slag multistage treatment method provided by the invention, including to steel
The broken of slag progress, screening and magnetic separation, specific method process are as follows:
1) steel slag after heat is bored is slagged tap, and is loaded into contractor dumper, is transported to the material shed transfer of steel slag factory, flat by feeding
Platform enters vibrating feed storehouse.
2) feed hopper vibrates pan feeding, the diameter range 0-800mm of pan feeding；The steel slag raw material terminal of 800mm or more is set up
Individual Environmental-protecting dust-removing pretreating zone cuts to the rear online processing of 300mm or less by oxygen.
3) pre-selection rotary screen is crossed, steel slag is divided into > the first steel slag of 300mm and the second steel slag of 0 ~ 300mm.
4) wherein:
Foldback cutting area is cut after first steel slag sorts.
Second steel slag is sent into jaw crusher, is broken for third steel slag, communicated band input level vibrating screen.
5) steel slag is divided into three kinds of grades by horizontal vibration sieve, the 5th steel slag and 5- of the 4th steel slag of 0-5mm, 40-300mm
The 6th steel slag of 40mm
6) wherein:
4th steel slag inputs strong magnetomechanical, strong magnetomechanical selects iron powder (full iron TFe > 60%) and metal by selecting under piano-wire screen
Iron is in MFe1% tailings below
5th steel slag inputs drum belt magnetic separation by selecting on piano-wire screen.
6th steel slag crosses magnetic roller；The first steel scrap selected and the 5th steel slag doubling input drum belt magnetic separation.
7) drum belt magnetic separation exports the second steel scrap and the 7th steel slag, and the second steel scrap is sent into autogenous grinding rolling barrel, the 7th steel
Slag is sent into crusher.
8) the 7th slag processing is the 8th steel slag by crusher, and the 8th steel slag is sieved back to horizontal vibration, forms closed circuit follow
Ring.
The crusher is impact breaker or centrifugal crusher.
9) autogenous grinding rolling barrel output screening is the steel slag of the steel slag (complete 70% or more iron TFe) of 5-50mm, 50-300mm
(complete 80% or more iron TFe) two grades and the 9th steel slags；9th steel slag sieves, shape through closed cycle back to horizontal vibration
At closed cycle.
All steel slag grades are in≤5mm；It is sent into strong magnetomechanical.
Tailings enters strong magnetomechanical, selects 0-5mm iron powder taste (full iron TFe > 60%)
The remaining ground slag of choosing, grade is in 5mm or less；After high intensity magnetic separation separates, metallic iron is in MFe1% or less；
Ground slag can be with raw material of the substitution sandstone aggregate as roadbed bed course, steady layer of water etc., as quotient's concrete and mortar；Or
Person makes pelletizing as auxiliary material, or as mixture bundled scrap.
Dust pelletizing system: whole producing line is totally-enclosed；And it is equipped with deduster, accomplish dust-proof, dedusting, effective control of dust pipe
Reason, dust emission≤10mg/m3.By 12 points of 1 host be distributed dusts generate 300-400 mesh slag micro powder (metallic iron MFe <
0.1%) it, can be used directly as clinker.
The utility model has the advantages that the present invention is based on the design principles of " more broken few mills ", using " broken+screening+magnetic separation+cleaning+removes
Dirt " moves in circles, and reaches economic and efficiently 99% or more recycling metal；Accomplish export trade tailings partial size specification 0-5mm, gold
Belong to iron content 1% hereinafter, sufficiently recycling renewable resource；Actually accomplish slag comprehensive utilization value maximization, tailings " zero-emission
It puts ".
The bottleneck of domestic steel slag and tailings processing technique is breached, has both emphasized efficient, the energy saving, ring that holistic approach arranges
The characteristics such as guarantor, but emphasis solves the slag iron freezing problem of tailings.After method processing of the invention, the tailings metallic iron that leaves
Content MFe<1%, actually reaches metal recovery rate>99% or more, really realizes 0 discharge.Tailings partial size, can be between 0-5mm
50/50 proportion is realized with blast furnace granulated slag, greatly improves comprehensive utilization value；Ground slag can be with substitution sandstone aggregate as roadbed
Bed course, steady layer of water etc., the raw material as quotient's concrete and mortar；Perhaps as auxiliary material production pelletizing or as mixture steel scrap pressure
Block.
Except it is above-described present invention solves the technical problem that, constitute technical solution technical characteristic and by these technologies
Outside advantage brought by the technical characteristic of scheme.To keep the object of the invention, technical scheme and beneficial effects clearer, below will
In conjunction with the attached drawing in the embodiment of the present invention, to other for including in the other technologies problem of the invention that can solve, technical solution
The advantages of technical characteristic and these technical characteristics are brought does apparent, complete description, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.Therefore, below to the reality of the invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Detailed description of the invention
Fig. 1 is the method flow diagram of the embodiment of the present invention.
Specific embodiment
Embodiment:
Steel slag multistage treatment method process such as Fig. 1 of the present embodiment, comprising the following steps:
(1) steel slag after heat is bored is slagged tap, and is loaded into contractor dumper, is transported to the material shed transfer of steel slag factory, passes through feeding
Platform enters vibrating feed storehouse.
(2) feed hopper vibrates pan feeding, the diameter range 0-800mm of pan feeding；The steel slag raw material terminal of 800mm or more is set up
Individual Environmental-protecting dust-removing pretreating zone cuts to the rear online processing of 300mm or less by oxygen.
(3) by pre-selection rotary screen, steel slag is divided into > 300mm and 0 ~ 300mm two types.Sorting greater than 300mm
Afterwards, foldback cutting area in part is cut.
(4) steel slag of 0-300mm is sent directly into jaw and breaks, and the conveyer belt below the broken machine of jaw is fallen into after broken, is sent into horizontal shake
Dynamic sieve.
(5) it is sieved by horizontal vibration, steel slag is divided into three kinds of grades, 0-5mm, 5-40mm and 40-300mm again.
(6) wherein, horizontal vibration sieve is directly entered strong magnetomechanical by the 0-5mm grade selected under piano-wire screen.
(7) wherein, the 40-300mm grade on horizontal vibration sieve piano-wire screen, into drum belt magnetic separation.What is magneticly elected is useless
Steel is sent into autogenous grinding rolling barrel, and choosing is remaining to enter impact breaker.
(8) wherein, the 5-40mm grade in horizontal vibration sieve steel-wire screen, crosses magnetic roller；The steel scrap and upper layer grade selected
Doubling, into drum belt magnetic separation.The steel scrap magneticly elected is sent into autogenous grinding rolling barrel, and choosing is remaining to enter centrifugal crusher, is crushed
Afterwards, horizontal vibration sieve is returned.
(9) all into impact breaker, it is sieved after being crushed back to horizontal vibration, forms closed cycle.
(10) all into centrifugal formula crusher, it is sieved after being crushed back to horizontal vibration, forms closed cycle.
(11) metal of autogenous grinding rolling barrel processing > 5mm；Finished product screen is divided into complete 70% or more the iron TFe of 5-50mm() and 50-
Complete 80% or more the iron TFe of 300mm() two grades；Recrement after cleaning is sieved through closed cycle back to horizontal vibration, is formed
Closed cycle.
(12) finally, into the tailings process segment.All steel slag grades are in≤5mm；It is sent into strong magnetomechanical.
(13) tailings enters strong magnetomechanical, selects 0-5mm iron powder taste (full iron TFe > 60%).
(14) the remaining ground slag of choosing, grade is in 5mm or less；After high intensity magnetic separation separates, metallic iron is in MFe1% or less；
Citing, can be with raw material of the substitution sandstone aggregate as roadbed bed course, steady layer of water etc., as quotient's concrete and mortar；Or
Person makes pelletizing as auxiliary material, or as mixture bundled scrap.
(15) dust pelletizing system: whole producing line is totally-enclosed；And it is equipped with deduster, accomplish effective control of dust-proof, dedusting, dust
Management, dust emission≤10mg/m3.Slag micro powder (the metallic iron MFe that dust generates 300-400 mesh is distributed by 12 points of 1 host
< 0.1%) it, illustrates, can be used directly as clinker.
This method is not limited only to converter slag, it can also be used to electroslag, casting residue, and furnace slag, reducing slag, desulfurization slag, etc.
Various steel slags.
In the description of the present invention, it should be noted that term " first ", " second ", " third " etc. are only used for distinguishing
Description, is not understood to indicate or imply relative importance.
The present invention provides a kind of completely new structure type, thinking and method, specific implementation for steel slag multistage treatment method
There are many method and approach of the technical solution, the above is only a preferred embodiment of the present invention, it is noted that for this skill
For the those of ordinary skill in art field, various improvements and modifications may be made without departing from the principle of the present invention,
These modifications and embellishments should also be considered as the scope of protection of the present invention.Each component part being not known in the present embodiment can be used existing
Technology is realized.
Claims (5)
1. a kind of steel slag multistage treatment method, including the broken, screening and magnetic separation carried out to steel slag, it is characterised in that including following
Step:
Step 1, the second slag crushing of 0-300mm is third steel slag by jaw crusher；
Step 2, third steel slag is divided into three kinds of grades by horizontal vibration sieve: the 4th steel slag of 0-5mm, piano-wire screen are selected under piano-wire screen
On select the 6th steel slag of 5-40mm in the 5th steel slag and sieve of 40-300mm；
Step 3, the 4th steel slag inputs strong magnetomechanical, and strong magnetomechanical selects the iron powder of TFe>60% and the tailings of MFe<1%；
Step 4, the 5th steel slag inputs drum belt magnetic separation；
Step 5, the 6th steel slag crosses magnetic roller；The first steel scrap and the tenth steel slag selected, the first steel scrap input drum belt magnetic separation；
Step 6, drum belt magnetic separation exports the second steel scrap and the 7th steel slag, and the second steel scrap is sent into autogenous grinding rolling barrel, the 7th steel
Slag is sent into impact breaker；
Step 7, the 7th slag processing is the 8th steel slag by impact breaker, and the 8th steel slag is sieved back to horizontal vibration, is formed
First closed cycle；
Step 8, autogenous grinding rolling barrel exports metal, sieves as 5-50mm TFe > 70%, 50-300mm TFe > 80% two grade,
And the 9th steel slag, the 9th steel slag are sieved back to horizontal vibration, form the second closed cycle.
2. a kind of steel slag multistage treatment method according to claim 1, it is characterised in that: in the step 1, steel slag is by shaking
Dynamic feed hopper vibrates pan feeding, the diameter range 0-800mm of pan feeding；The steel slag of 800mm or more cuts to online place after 300mm or less
Reason；Cross pre-selection rotary screen, steel slag is divided into > the first steel slag of 300mm and the second steel slag of 0 ~ 300mm, after the first steel slag sorts
The cutting of foldback cutting area.
3. steel slag multistage treatment method according to claim 1, it is characterised in that: in the step 2, the 4th steel slag is selected from
Third steel slag, the 8th steel slag and the 9th steel slag.
4. steel slag multistage treatment method according to claim 1, it is characterised in that: in the step 5, the tenth steel slag
Handling through centrifugal crusher is the 11st steel slag, and the 11st steel slag sieves to form that third is closed circuit to be followed back to horizontal vibration
Ring.
5. steel slag multistage treatment method according to claim 1, it is characterised in that: whole producing line is totally-enclosed, and is equipped with and removes
Dirt device is distributed the slag micro powder that dust generates 300-400 mesh by 12 points of 1 host, uses as clinker.
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| CN201810653120.XA CN109092844B (en) | 2018-06-22 | 2018-06-22 | Steel slag multistage treatment method |
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| CN110484663A (en) * | 2019-08-29 | 2019-11-22 | 建龙阿城钢铁有限公司 | A kind of converter slag treatment process |
| CN111360038B (en) * | 2020-04-09 | 2020-12-29 | 扬州瑞顺投资咨询有限公司 | Be used for broken dry-pressing forming device of old and useless material |
| US20240091856A1 (en) * | 2020-11-26 | 2024-03-21 | Magsort Oy | Separation of stainless steel slag |
| CN112642580B (en) * | 2020-12-01 | 2023-10-13 | 湖北理工学院 | Disposal method for gradient utilization of steel slag |
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| CN1108200C (en) * | 2000-09-08 | 2003-05-14 | 武汉冶金渣环保工程有限责任公司 | Comprehensive utilization of steel slags |
| CN101249498B (en) * | 2008-04-03 | 2010-08-04 | 南京钢铁集团盛达实业有限公司 | Cold steel scoria processing method |
| JP5321845B2 (en) * | 2010-06-22 | 2013-10-23 | 新日鐵住金株式会社 | Wet classification equipment for steel slag |
| CN102534068A (en) * | 2012-01-30 | 2012-07-04 | 山西太钢不锈钢股份有限公司 | Method for reusing common steel slag |
| CN104004867B (en) * | 2014-05-13 | 2016-01-20 | 中冶南方工程技术有限公司 | A kind of slag secondary treatment technique of efficient economy |
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