CN109046756A - Graphite choosing method is enriched in steel desulfurization slag - Google Patents
Graphite choosing method is enriched in steel desulfurization slag Download PDFInfo
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- CN109046756A CN109046756A CN201811061137.2A CN201811061137A CN109046756A CN 109046756 A CN109046756 A CN 109046756A CN 201811061137 A CN201811061137 A CN 201811061137A CN 109046756 A CN109046756 A CN 109046756A
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- graphite
- flotation
- sanded
- enrichment
- dusting
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 64
- 239000010439 graphite Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 59
- 239000002893 slag Substances 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 35
- 239000010959 steel Substances 0.000 title claims abstract description 35
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 27
- 230000023556 desulfurization Effects 0.000 title claims abstract description 27
- 238000010410 dusting Methods 0.000 claims abstract description 30
- 239000000428 dust Substances 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000498 ball milling Methods 0.000 claims abstract description 16
- 238000005406 washing Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 238000009692 water atomization Methods 0.000 claims abstract description 9
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000012216 screening Methods 0.000 claims abstract description 7
- 238000010298 pulverizing process Methods 0.000 claims abstract description 4
- 238000005188 flotation Methods 0.000 claims description 52
- 239000002002 slurry Substances 0.000 claims description 24
- 239000004088 foaming agent Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 8
- 238000007885 magnetic separation Methods 0.000 claims description 7
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 239000003082 abrasive agent Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000002283 diesel fuel Substances 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 239000006148 magnetic separator Substances 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 230000001629 suppression Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 8
- 230000004069 differentiation Effects 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000007921 spray Substances 0.000 abstract description 2
- 238000009628 steelmaking Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000005008 domestic process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention belongs to steelmaking technical fields, more particularly to the choosing method of graphite is enriched in a kind of steel desulfurization slag, the following steps are included: A: the processing of desulfurization slag: including the steps that the dusting of water atomization spraying cooling and sieves energetically, B: the collection of the dust containing enrichment graphite: include the steps that negative pressure screening and whirlwind enrichment plus bag-type dusting, C: including washing ball milling and floatation process step the promotion of enrichment graphite grade: is sanded.Traditional hot application technique is replaced using spray pulverization process, is that red slag differentiation efficiency greatly improved, and reduce water consumption 40% or more compared with existing common hot application technique；It improves differentiation rate, reduce water consumption；The recycling for increasing enrichment graphite, improves economic benefit, reduces secondary pollution.
Description
Technical field
The invention belongs to steelmaking technical fields, and in particular to the choosing method of graphite is enriched in a kind of steel desulfurization slag.
Background technique
Currently, generally to the element sulphur in molten iron using KR method (stirring of addition quick lime) and blowing in domestic process for making
Method (blowing passive metal magnesium grain) carries out desulfurization operations, in the desulfurization slag generated after operation, can contain a certain amount of enrichment stone
Ink.
We have found that domestic current desulfurization Slag treatment usual way is: dropping thermally desulfurizing slag first with hot application method
Warm dusting, then using being sieved energetically, by the bulk slag steel screening process of 50 or more diameter；Be finally by minus mesh with
Common steel slag mixing is latter to choose ferro element (including grain steel and steel fine powder) therein, graphitiferous with into crushing-magnetic selection production line
Tailings is discharged after mixing with steel slag tailings and gives it up, and causes the waste of resource and the secondary pollution of environment.
In existing processing method, common hot application dusting effect is poor, and water consumption is big；Being enriched with graphite conduct can be provided using graphite
Source is unable to get effective recycling, causes the loss of economic benefit and the secondary pollution of environment.
Summary of the invention
For drawback existing for current desulfurization residues processing technique, the object of the present invention is to provide a kind of comprehensive ferro elements to select
It takes, and recycles and be enriched with graphite in desulfurization slag tailings, carry out resource circulation utilization.
The specific technical solution of the present invention is as follows:
The present invention provides enrichment graphite in a kind of steel desulfurization slag and chooses technique, comprising the following steps:
A: the processing of desulfurization slag: including the steps that the dusting of water atomization spraying cooling and sieves energetically,
Wherein, the water atomization spraying cooling dusting is the following steps are included: using spiral atomizer, to desulfurization slag warm sludge
Carry out dusting；
It is described to sieve energetically: the desulfurization slag after dusting being sieved, the dust containing enrichment graphite is obtained；；
B: the collection of the dust containing enrichment graphite: include the steps that negative pressure screening and whirlwind enrichment plus bag-type dusting, benefit
Dust containing enrichment graphite is collected by the pipe negative pressure formed with whirlwind and bag-type dusting；
C: the promotion of enrichment graphite grade: including washing ball milling and being sanded floatation process step,
Wherein, the washing ball milling includes: to carry out washing ball milling and magnetic separation to the dust of the graphite containing enrichment, and dust is carried out
Initial gross separation；Steel fine powder is obtained by magnetic separator；
The sand milling flotation: being sanded four flotation and cleaner flotation including rough floatation, four,
A, rough floatation: the slurry concentration after magnetic separation is controlled in 20%~25% range, is added in rough floatation entrance
The ratio of infusion and agent for capturing, slurry and foaming agent is 1T:1~1.5kg；The ratio of slurry and foaming agent be 1T:0.5~
1kg., the bubble slurries of formation send to four be sanded four flotation circuits；
B, four four flotation are sanded: using floatation process after being first sanded, the bubble slurries come to roughing process are sanded, make
Graphite is further separated with impurity；Purification by floatation is carried out to graphite using flotation device；
C, cleaner flotation: using flotation device, is carried out by supplementing new water to the graphite slurries after four are sanded four flotation circuits
Final purification & isolation obtains graphite
It preferably, further include the control of dust in the selection technique, wherein the control of dust is solid including micron order
The dust suppression of fixed pattern fog gun and water recycle environment-protective process.
Preferably, water atomization spraying cooling pulverization process described in step A: being the spiral using 15~20mm of Ф
Dusting is turned to Ф 1mm water droplet below with water mist, and then carries out dusting to desulfurization slag warm sludge by atomizer；Eliminate bulk board
Slagging separates slag steel and reduces the temperature to room temperature, is convenient for subsequent processing.
Preferably, the bar screen for the use of sieve being energetically 50~100mm of aperture is to de- after dusting described in step A
Sulphur slag is sieved, and with loading machine feeding, oversize is slag steel, the raw material that minus mesh is grain steel, graphite, steel fine powder are collected.
Preferably, the pipe negative pressure formed described in B using whirlwind and bag-type dusting, cooperation aperture are 3~5mm's
Dust containing enrichment graphite is collected, the raw material of graphite is chosen as next step floatation process by exciting screen, simultaneously will
The grain steel screening of 3mm or more selects.
Preferably, in washing ball milling described in step C, the dust containing enrichment graphite carries out washing ball milling and magnetic
Choosing, using rotation of 60~120mm of Ф steel ball in the mill body of 1200~3600mm of diameter Ф, by dust enrichment graphite,
Steel fine powder and other impurity carry out initial gross separation by ball milling method.
Preferably, floatation process is sanded described in C, flotation is carried out to enrichment graphite, makes up to 80% or more
Grade, while impurity being separated.
Preferably, described in step a in rough floatation technique, slurry is total in flotation device and foaming agent, agent for capturing
Under same-action, forms the bubble slurries of 7~15mm of Ф and scraped by scraper plate, be delivered to four sand millings, four flotation circuit through overflow launder.
Preferably, foaming agent described in step a rough floatation is 2# flotation oil, and the agent for capturing is diesel oil.
Preferably, the bubble slurries for forming 7~15mm of Ф in step a rough floatation in step a rough floatation are sent to four sand
Grind four flotation circuits.
Preferably, four four flotation of sand milling described in step b, using floatation process after being first sanded, sand mill uses Ф
800~1200mm vertical mill, filling abrasive material are zirconia ceramics ball.Main function is carried out to the bubble slurries that roughing process is come
It is sanded, separates graphite further with impurity；Using flotation device using inflatable scraper plate flotation machine in XJK type, effect is to stone
Ink carries out purification by floatation.
Preferably, flotation device described in four flotation and step c cleaner flotation is sanded using inflating in XJK type in step b tetra-
Formula scraper plate flotation machine.
Preferably, in step c using inflatable scraper plate flotation machine in XJK type, by supplementing new water to selecting work in warp
Graphite slurries after sequence are finally purified, and realize the final separation of tail mud and graphite.Wherein, tail mud is conveyed by Pulp pump
Outward transport；Graphite forms finished product graphite block after plate and frame filter press filters pressing.
In above-mentioned technique, foaming agent, agent for capturing are only added in roughing inlet, and subsequent handling is no longer added.
Compared with prior art, present invention has an advantage that
Replace traditional hot application technique using spray pulverization process, be compared with existing common hot application technique greatly improved it is red
Slag differentiation efficiency, and reduce water consumption 40% or more；It improves differentiation rate, reduce water consumption；Fully ensuring that slag steel, grain steel and steel
On the basis of the ferrous materials such as fine powder sufficiently recycle, increase enrichment graphite recycling, improve economic benefit, reduce it is secondary
Pollution.Dusting water consumption is reduced, production cost is reduced；The recycling for increasing enrichment graphite, improves economic benefit.
Detailed description of the invention
Fig. 1 is the process flow chart that graphite choosing method is enriched in steel desulfurization slag of the invention.
Specific embodiment
The present invention is further explained in the light of specific embodiments.
Embodiment 1
The new upper desulfurization graphite treatment production line of Laiwu steel double mountain clay welfare processing Co., Ltd, use are
The technical method that the invention patent is researched and developed.This production line year handles 50,000 tons of desulfurization graphite, sufficiently recycles in guarantee ferrous material
Basic mountain, year can be recycled 80% grade more than about 4000 tons of enrichment graphite, realize good economic benefit.
Its main production are as follows:
A: the processing of desulfurization slag: including the steps that the dusting of water atomization spraying cooling and sieves energetically,
Water atomization spraying cooling dusting: using the spiral atomizer of Ф 15mm, dusting is turned into Ф 1mm or less with water mist
Water droplet, and then to desulfurization slag warm sludge carry out dusting, eliminate bulk board slagging, separation slag steel simultaneously reduce the temperature to room temperature, be convenient for
Subsequent processing；
Sieve energetically: the desulfurization original slag after dusting is sieved, and obtains the dust containing enrichment graphite；Sieve is aperture energetically
The bar screen of 50mm, with loading machine feeding, oversize is slag steel, the raw material that minus mesh is grain steel, graphite, steel fine powder are collected；
B: the collection of the dust containing enrichment graphite: include the steps that negative pressure screening and whirlwind enrichment plus bag-type dusting, benefit
The pipe negative pressure formed with whirlwind and bag-type dusting, the exciting screen that cooperation aperture is 3mm carry out the dust containing enrichment graphite
It collects, the raw material of graphite is chosen as next step floatation process, while the screening of the grain steel of 3mm or more being selected；
C: the promotion of enrichment graphite grade: including washing ball milling and being sanded floatation process step,
Washing ball milling and magnetic separation are carried out to graphitiferous dust, using Ф 60mm steel ball in the mill body of diameter Ф 1200mm
Rotation, carries out initial gross separation by ball milling method for enrichment graphite, steel fine powder and the other impurity in dust；Slurry passes through after mill
Magnetic separator obtains steel fine powder；
Flotation is sanded: four flotation and cleaner flotation is sanded including rough floatation, four, flotation is carried out to enrichment graphite, is made up to
Average 88% grade, while impurity being separated.Specifically:
A, rough floatation: by after magnetic separation slurry concentration control in 23% range, rough floatation entrance be added foaming agent and
Agent for capturing.For rough floatation using inflatable scraper plate flotation machine in XJK type, foaming agent is 2# flotation oil, additional amount 1T:1.4kg；It catches
Catching agent is diesel oil, additional amount 1T:0.8kg.In rough floatation technique, slurry flotation device and foaming agent, agent for capturing it is common
Under effect, forms the bubble slurries of 7~15mm of Ф and scraped by scraper plate, be delivered to four sand millings, four flotation circuit through overflow launder.
B, four sand millings four are floating: choosing is using floatation process after being first sanded.Sand mill uses 800 vertical mill of Ф, and filling abrasive material is
Zirconia ceramics ball, main function are that the bubble slurries come to roughing process are sanded, and separate graphite further with impurity；
For flotation device using inflatable scraper plate flotation machine in XJK type, effect is to the conscientious purification by floatation of graphite.
C, cleaner flotation: using inflatable scraper plate flotation machine in XJK type, by supplementing new water to the graphite after selecting process in
Slurries are finally purified, and realize the final separation of tail mud and graphite.Wherein, tail mud is conveyed by Pulp pump and is transported outward；Graphite
Finished product graphite block is formed after plate and frame filter press filters pressing.
In above-mentioned technique, foaming agent, agent for capturing are only added in roughing inlet, and subsequent handling is no longer added.
Certainly, the present invention can also there are many embodiments, without deviating from the spirit and substance of the present invention, are familiar with
Those skilled in the art can disclosure according to the present invention make various corresponding changes and modifications, but these it is corresponding change and
Deformation all should belong to scope of protection of the claims of the invention.
Claims (10)
1. being enriched with the choosing method of graphite in a kind of steel desulfurization slag, comprising the following steps:
A: the processing of desulfurization slag: including the steps that the dusting of water atomization spraying cooling and sieves energetically,
Wherein, the water atomization spraying cooling dusting carries out desulfurization slag warm sludge the following steps are included: using spiral atomizer
Dusting；
It is described to sieve energetically: the desulfurization slag after dusting being sieved, the dust containing enrichment graphite is obtained；
B: the collection of the dust containing enrichment graphite: include the steps that negative pressure screening and whirlwind enrichment plus bag-type dusting, utilize rotation
Dust containing enrichment graphite is collected by the pipe negative pressure that wind and bag-type dusting are formed；
C: the promotion of enrichment graphite grade: including washing ball milling and being sanded floatation process step,
Wherein, the washing ball milling includes: to carry out washing ball milling and magnetic separation to the dust of the graphite containing enrichment, dust is carried out preliminary
Separation；Steel fine powder is obtained by magnetic separator；
The sand milling flotation: being sanded four flotation and cleaner flotation including rough floatation, four,
A, rough floatation: the slurry concentration after magnetic separation is controlled in 20%~25% range, and foaming agent is added in rough floatation entrance
And agent for capturing, the ratio of slurry and foaming agent are 1T:1~1.5kg；The ratio of slurry and foaming agent is 1T:0.5~1kg, shape
At bubble slurries send to four be sanded four flotation circuits；
B, four four flotation are sanded: using floatation process after being first sanded, the bubble slurries come to roughing process are sanded, and make graphite
It is further separated with impurity；Purification by floatation is carried out to graphite using flotation device；
C, cleaner flotation: using flotation device, is carried out finally by supplementing new water to the graphite slurries after four are sanded four flotation circuits
Purification & isolation obtains graphite.
2. the method according to claim 1, wherein further including the control of dust in the selection technique, wherein
The control of dust includes that the fixed fog gun dust suppression of micron order and water recycle environment-protective process.
3. the method according to claim 1, wherein water atomization spraying cooling pulverization process described in step A:
It is the spiral atomizer using 15~20mm of Ф, dusting is turned into Ф 1mm water droplet below with water mist, and then to desulfurization slag heat
Slag carries out dusting.
4. the method according to claim 1, wherein the bar screen pair for the use of sieve being energetically 50~100mm of aperture
Desulfurization slag after dusting described in step A is sieved.
5. the method according to claim 1, wherein containing enrichment graphite in washing ball milling described in step C
Dust carries out washing ball milling and magnetic separation, utilizes 60~120mm of Ф steel ball turning in the mill body of 1200~3600mm of diameter Ф
It is dynamic, enrichment graphite, steel fine powder and the other impurity in dust are subjected to initial gross separation by ball milling method.
6. the method according to claim 1, wherein foaming agent described in step a rough floatation is 2# flotation oil, institute
Stating agent for capturing is diesel oil.
7. the method according to claim 1, wherein forming the bubble slurries of 7~15mm of Ф in step a rough floatation
It send to four and four flotation circuits is sanded.
8. the method according to claim 1, wherein four flotation are sanded in step b tetra-, using flotation work after being first sanded
Skill, sand mill use 800~1200mm of Ф vertical mill, and filling abrasive material is zirconia ceramics ball.
9. the method according to claim 1, wherein step b tetra- is sanded described in four flotation and step c cleaner flotation
Flotation device is using inflatable scraper plate flotation machine in XJK type.
10. the method according to claim 1, wherein obtaining graphite in step c cleaner flotation through plate and frame filter press pressure
Finished product graphite block is formed after filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811061137.2A CN109046756B (en) | 2018-09-12 | 2018-09-12 | Method for selecting enriched graphite in steelmaking desulfurization slag |
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| CN201811061137.2A CN109046756B (en) | 2018-09-12 | 2018-09-12 | Method for selecting enriched graphite in steelmaking desulfurization slag |
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| CN114887775A (en) * | 2022-03-29 | 2022-08-12 | 中南大学 | Method for efficiently separating and recycling graphite from vanadium leaching slag |
| CN115254319A (en) * | 2022-06-23 | 2022-11-01 | 山东钢铁股份有限公司 | Device and method for separating primary large-scale graphite from molten iron pretreatment desulphurization slag |
| CN115254319B (en) * | 2022-06-23 | 2023-12-05 | 山东钢铁股份有限公司 | Device and method for separating primary large-scale graphite from molten iron pretreatment desulfurization slag |
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Denomination of invention: Selection method of enriched graphite in desulphurization slag of steelmaking Effective date of registration: 20230214 Granted publication date: 20200918 Pledgee: Agricultural Bank of China Limited Laiwu Branch Pledgor: SHANDONG TAIDONG ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Registration number: Y2023980032623 |
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Denomination of invention: Selection method for enriched graphite in desulfurization slag of steelmaking Granted publication date: 20200918 Pledgee: Agricultural Bank of China Limited Laiwu Branch Pledgor: SHANDONG TAIDONG ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Registration number: Y2024980005633 |