CN106824513A - Slag crushing screening plant - Google Patents

Slag crushing screening plant Download PDF

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Publication number
CN106824513A
CN106824513A CN201710190403.0A CN201710190403A CN106824513A CN 106824513 A CN106824513 A CN 106824513A CN 201710190403 A CN201710190403 A CN 201710190403A CN 106824513 A CN106824513 A CN 106824513A
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CN
China
Prior art keywords
slag
sieve
screening plant
grinder
abrasive
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
Application number
CN201710190403.0A
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Chinese (zh)
Inventor
吴文南
赵海兵
于建中
党清玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiangshui Hengsheng Stainless Steel Casting Co Ltd
Original Assignee
Xiangshui Hengsheng Stainless Steel Casting Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Xiangshui Hengsheng Stainless Steel Casting Co Ltd filed Critical Xiangshui Hengsheng Stainless Steel Casting Co Ltd
Priority to CN201710190403.0A priority Critical patent/CN106824513A/en
Publication of CN106824513A publication Critical patent/CN106824513A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00General arrangement of separating plant, e.g. flow sheets
    • B03B9/04General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags

Abstract

The present invention provides a kind of slag crushing screening plant, including water sprinkler, screen cloth, disintegrating machine, coarseness ore grinder, magnetic separator and jigging machine, the slag crushing screening plant is by original slag by three crushing, again through magnetic separation and gravity treatment, metal quality fraction in original slag can be decreased to less than 1.5% by about 5%, metal is reclaimed, environmental pollution is reduced.It has the advantages that equipment is simple and convenient to operate and energy-saving and emission-reduction.

Description

Slag crushing screening plant
Technical field
Screening field is crushed the invention belongs to slag, specifically, a kind of broken screening plant of stainless steel waste residue is relate to.
Background technology
In stainless steel smelting process, hybrid reaction is constantly carried out between molten steel and slag, often mixed in slag Small molten steel drop.If these drops enter molten steel without enough time, will be with the cooling of slag, with slag solid Mix under body state.Stainless steel-making factory can produce a large amount of slags, slag amount to account for the 23%w of steel output in steelmaking process.Through Initial analysis is crossed, containing the about metallics of 5%w in slag, metallics is mainly Fe, Cr and Ni, and remaining major part is Nonmetallic CaO and and SiO2.Firstly, because metallics is in itself the raw material of steel-making, there is value very high, when in slag Useful metallics is mixed into, the waste of stainless steel cost is caused;Secondly as slag bulk component is mainly CaO and SiO2, It being commonly used as the raw material of cement, and the metallic particles contained in slag, cement performance will be had a negative impact;Again, by Contain heavy metal Cr and Ni in copper smelter slag, though most of slag is semiclosed storage, still suffer to the threat of environment because Element;In addition, China's nickel resources are seriously poor, chromium resource is not enough, causes that early stage nickel valency suddenly rises, chromium valency constantly rises, and makes stainless steel Production cost remain high.The metallics in stainless steel slag how is reclaimed, production cost is reduced and is reduced to environment Pollution, is the great research topic of stainless steel-making factory.
In the slag treatment technology of carbon steel steelmaking factory, due to the relatively high magnetism of carbon steel, slag is generally used and is first crushed The mode of magnetic separation is carried out afterwards.But, because the metallic particles magnetic in stainless steel slag is not strong, even without magnetic, only lean on Cannot be sufficiently separated for metallics and slag body by the mode of magnetic separation.Number of patent application is 201310220422.5, entitled One primary dcreening operation unit of slag Treatment technique for processing application, four magnetic separation disclosed in a kind of patent of invention of slag Treatment technique for processing Unit, a fragmentation cell and a device for rod milling screening unit process the useful metal in screening slag, but the device Cannot the non magnetic slag of Effective selection, be not suitable for the screening of stainless steel-making slag.And the more magnetic separation of the device application Unit, and equipment is more, complex operation, electricity expends larger, and production cost is high.
In order to solve the above problems, production cost is reduced, simplify operating procedure, we are seeking a kind of preferable skill always Art solution.
The content of the invention
The purpose of the present invention is directed to the deficiencies in the prior art, so as to provide a kind of low production cost and steel simple to operate Waste residue crushes screening plant.
A kind of slag crushing screening plant, including water sprinkler, screen cloth, disintegrating machine, coarseness ore grinder, magnetic separator, Jigging machine and shaking table, wherein, it is efflorescence slag that the water sprinkler is used for hot original slag watering efflorescence;
It is the upper slag of sieve and the lower slag of sieve that the screen cloth is used for efflorescence slag screening;
The disintegrating machine is used for slag crushing on the sieve into broken material;
The coarseness ore grinder is used to for slag under the sieve and the broken material to be ground to abrasive, the coarseness Ore grinder is provided with vibratory sieve, and abrasive screening is the upper abrasive of sieve and the lower abrasive of sieve by the vibratory sieve;
It is magnetic material and non magnetic material that the magnetic separator is used for abrasive magnetic separation on the sieve;
The jigging machine is used to for the non-magnetic material gravity treatment to go out heavy burder and light material;
The shaking table is used to for abrasive gravity treatment under the sieve to go out heavy burder and light material.
Based on above-mentioned, the sieve bore dia≤3mm of the vibratory sieve.
Based on above-mentioned, the coarseness ore grinder is spherical grinder.
Based on above-mentioned, the spherical grinder is wet type ball-type grinder.
Based on above-mentioned, it also includes transporting chute, the charging aperture of the transporting chute and the wet type ball-type grinder Sieve lower discharge port docking, the discharging opening of the transporting chute is docked with the charging aperture of the shaking table.
Based on above-mentioned, the jigging machine is movable-sieve jig.
Based on above-mentioned, the disintegrating machine is simple pendular jaw crusher.
Based on above-mentioned, the magnetic separator is belt magnetic separator.
Based on above-mentioned, the belt magnetic separator is magnetic separator with adjustable magnetic field strength.
The present invention has prominent substantive distinguishing features progressive with significant compared with the prior art, specifically, of the invention With three pulverizing units:Water sprinkler, disintegrating machine and spherical grinder, improve crushing effect, and extend the disintegrating machine and The service life of the coarseness grinder.Furtherly, first pulverizing unit of the invention using water sprinkler come powder of sprinkling water Change original slag, expanded using CaO water absorption reactions and cause slag efflorescence, simple to operate, equipment and low production cost can also subtract The dust of few later pulverizing processes.Another step says that the present invention uses coarseness ore grinder according to material properties, reduces and sets Standby cost, improves the screening efficiency of slag.It has low production cost and the simple advantage of operating procedure.
Brief description of the drawings
Fig. 1 is process flow diagram of the invention.
In figure, 1. water sprinkler, 2. screen cloth, 3. disintegrating machine, 4. coarseness ore grinder, 5. magnetic separator, 6. jigging machine, 7. Transporting chute, 8. shaking table.
Specific embodiment
Below by specific embodiment, technical scheme is described in further detail.
As shown in figure 1, a kind of slag crushing screening plant, including water sprinkler 1, screen cloth 2, disintegrating machine 3, coarseness ore grind Grinding machine 4, magnetic separator 5 and jigging machine 6, wherein, it is efflorescence steel that the water sprinkler 1 is used for hot original slag watering efflorescence Slag.It is the upper slag of sieve and the lower slag of sieve that the screen cloth 2 is used for efflorescence slag screening.
The disintegrating machine 3 is used for slag crushing on the sieve into broken material, and in the present embodiment, the disintegrating machine 3 is Simple pendular jaw crusher.Simple pendular jaw crusher compact conformation is simple, the phenomenon of material rarer overcrushing during processing, crushes Material granularity is uniform, is easy to the crushing of the later pulverizing processes, and equipment is difficult wear damage.
Because the metal being mixed into slag in steelmaking process occurs with particle shape, by artificial screening, in our factory's slag Metallic particles size in 4mm or so, therefore use coarseness ore grinder.The coarseness ore grinder 4 is used for institute State the lower slag of sieve and the broken material be ground to abrasive, in specifically used, our factory use for controlling wet-type finishing machine and be ball Shape grinder.Wherein, the spherical grinder is provided with vibratory sieve, and the sieve diameter of the vibratory sieve is 3mm, the vibratory sieve It is the upper abrasive of sieve and the lower abrasive of sieve by abrasive screening.Wherein, the gravitational separation equipment for sieving lower abrasive is shaking table, shaking table It is suitable for particle of the gravity treatment granularity in below 3mm, the sieve diameter of the vibratory sieve selects 3mm, that is, improves the screening of shaking table Efficiency, and most of useful metal particle entrapment is carried out into lower one magnetic separating unit in abrasive on sieve, screening efficiency is high.
Slag bulk component is mainly CaO and SiO2, according to slag in broken material and the difference of metallic particles compression strength, Slag compression strength is smaller be easier to by spherical grinder be ground to it is powdered swept away by water, will not be bonded on metallic particles, and Metallic particles compression strength containing useful metal is larger, and easy grinding is not in small, broken bits.Therefore the upper abrasive of sieve contains more bulky grain and has With metal, and it is less to sieve lower abrasive useful metal amount.The present invention is greatly improved using the wet type ball-type grinder and ground The screening efficiency of mill efficiency and subsequent handling.
Present invention additionally comprises transporting chute 7, the transporting chute 7 is used to for abrasive under the sieve to be delivered to the shaking table 8.Shaking table is realized using the effect of the flushing of the shake and current of machinery by little particle metal and little particle slag difference of specific gravity Metal and slag are separated.Abrasive gravity treatment under the sieve is gone out heavy burder and light material by the shaking table 8, and heavy burder therein is reclaimed materials, It is referred to as shaking table iron in our factory.
Magnetic separating unit of the invention is magnetic separator 5, and it is magnetic material that the magnetic separator 5 is used for abrasive magnetic separation on the sieve With non magnetic material, wherein most metallic particles is screened out for magnetic material, magnetic material composition close to stainless steel product composition, Can be directly used for steel-making.Non magnetic material enters next step gravity treatment operation.In the present embodiment, the magnetic separator 5 is belt magnetic separation Machine, is both magnetic separator and conveyer, and compact conformation reduces equipment cost.Magnetic separator 5 is also magnetic field intensity in the present invention Adjustable belt magnetic separator, controlling magnetic field strength range is 100mT-200mT, can be according to making steel during specific magnetic separation The difference of the grade of ore in journey, regulation processes the magnetic field intensity of the magnetic separator of its slag, applied widely, improves the rate of recovery, drop Low production cost.
The gravity treatment unit of non magnetic material is jigging machine 6, and the jigging machine 6 is used for the non-magnetic material gravity treatment weight Material and light material, heavy metallic particles are heavy burder in lower floor, and the small slag of proportion is light material on upper strata, and realization further divides From heavy burder therein is reclaimed materials, is also referred to as grinding iron in our factory, wherein grinding iron accounts for the 10% of magnetic material quality.Specific In implementation, the jigging machine 6 that our factory uses is movable-sieve jig, and movable-sieve jig can make sieve by reciprocating sieve Material on face is layered, therefore does not need excessive hydraulic pressure and current, saves water resource, reduces production cost.
Original slag Li Du≤1000mm, the sieve of screen cloth 2 described in specific implementation after the watering efflorescence of the water sprinkler 1 Bore dia is 300mm, and after the slag separating twice more than 300mm is crushed through the simple pendular jaw crusher, granularity further drops It is low to arrive 300mm or so, three crushing grain degree≤10mm after the grinding of the wet type spherical grinder.By the vibratory sieve Screening, abrasive carries out magnetic separation into the belt magnetic separator on the sieve of Li Du≤3mm, magneticly elects magnetic material, non magnetic material warp Jigging machine gravity treatment is crossed to go out to grind iron;Abrasive enters the gravity treatment of shaking table 8 under sieve of the granularity less than 3mm, and gravity treatment goes out shaking table iron.
The copper smelter slag of 304 series stainless steels of our factory carries out 4 treatment screenings using present invention treatment screening slag.
The metal in slag after screening is analyzed using xrf analysis instrument:Cr2O3With the mass fraction average mark of Ni 1.22% and 0.217% is not reduced to, and the mass content summation of the stove metal in the dreg after screening is less than 1.5%, reaches expected screening Target, as shown in table 1.
Table 1.
  For the first time Second For the third time 4th time Averagely
1.52 1.61 0.83 0.92 1.22
Ni% 0.3 0.38 0.06 0.13 0.217
Using GB/T 223.23 --- 1994《Steel and alloy analysis method dimethylglyoxime spectrophotometry nickel Amount》With GB/T 223.12 --- 1991《Steel and the hydrazine Spectrophotometry for Determination of alloy analysis method sodium carbonate separation-dibenzoyl two Determine chromium》Slag composition of steel to filtering out is analyzed:Ball milling iron:Cr=17.0%-17.3%, Ni=7%-7.2%;Shaking table iron:Cr= 17.0%-17.3%, Ni=6.0%-6.1%, close to the content of product, as shown in table 2.
Table 2.
The present invention is screened using the most frequently used ore screening equipment to slag, can reach preferable screening effect, will not Useful metal content is down to about 1.5% from about 5% in rust steel stove slag, reaches target, and equipment cost is relatively low, reduces environment dirty Dye, reduces production cost.
Finally it should be noted that:The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations;To the greatest extent Pipe has been described in detail with reference to preferred embodiment to the present invention, and those of ordinary skill in the art should be understood:Still Specific embodiment of the invention can be modified or equivalent is carried out to some technical characteristics;Without deviating from this hair The spirit of bright technical scheme, it all should cover in the middle of claimed technical scheme scope of the invention.

Claims (9)

1. a kind of slag crushing screening plant, it is characterised in that:It includes water sprinkler, screen cloth, disintegrating machine, the grinding of coarseness ore Machine, magnetic separator, jigging machine and shaking table, wherein, it is efflorescence slag that the water sprinkler is used for the watering efflorescence of original slag;
It is the upper slag of sieve and the lower slag of sieve that the screen cloth is used for efflorescence slag screening;
The disintegrating machine is used for slag crushing on the sieve into broken material;
The coarseness ore grinder is used to for slag under the sieve and the broken material to be ground to abrasive, the coarseness Ore grinder is provided with vibratory sieve, and abrasive screening is the upper abrasive of sieve and the lower abrasive of sieve by the vibratory sieve;
It is magnetic material and non magnetic material that the magnetic separator is used for abrasive magnetic separation on the sieve;
The jigging machine is used to for the non-magnetic material gravity treatment to go out heavy burder and light material;
The shaking table is used to for abrasive gravity treatment under the sieve to go out heavy burder and light material.
2. slag crushing screening plant according to claim 1, it is characterised in that:The sieve bore dia of the vibratory sieve≤ 3mm。
3. slag crushing screening plant according to claim 1 and 2, it is characterised in that:The coarseness ore grinder It is spherical grinder.
4. slag crushing screening plant according to claim 3, it is characterised in that:The spherical grinder is wet type ball-type Grinder.
5. slag crushing screening plant according to claim 4, it is characterised in that:It also includes transporting chute, described defeated Send the charging aperture of chute to be docked with the sieve lower discharge port of the wet type ball-type grinder, the discharging opening of the transporting chute with it is described The charging aperture docking of shaking table.
6. slag crushing screening plant according to claim 4, it is characterised in that:The jigging machine is movable-sieve jig.
7. slag crushing screening plant according to claim 4, it is characterised in that:The disintegrating machine is letter pendulum jaw crushing Machine.
8. slag crushing screening plant according to claim 4, it is characterised in that:The magnetic separator is belt magnetic separator.
9. slag crushing screening plant according to claim 7, it is characterised in that:The belt magnetic separator is magnetic field intensity Adjustable magnetic separator.
CN201710190403.0A 2017-03-28 2017-03-28 Slag crushing screening plant Pending CN106824513A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108480369A (en) * 2018-03-13 2018-09-04 郑州傲宙建材有限公司 A kind of waste residue soil cleaning screening technology
CN110355107A (en) * 2018-04-09 2019-10-22 中冶宝钢技术服务有限公司 Steel slag metal charge refines system and refining technique
CN113083492A (en) * 2021-03-30 2021-07-09 黄石市旺新环保科技有限公司 Steelmaking solid waste integrated treatment system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103100546A (en) * 2011-11-09 2013-05-15 昌三机电科技(苏州)有限公司 Stainless steel slag dry and wet combination treatment process
CN105063258A (en) * 2015-08-30 2015-11-18 武汉福安神州建材有限公司 Stainless steel slag recycling method
CN204982009U (en) * 2015-05-28 2016-01-20 中冶南方工程技术有限公司 Reclaiming of stainless steel slag utilizes device
EP3037560A1 (en) * 2014-12-22 2016-06-29 Paolo Bevilacqua Method and apparatus for the valorization of steel slags
CN106244748A (en) * 2016-09-14 2016-12-21 中冶华天南京工程技术有限公司 A kind of stainless steel slag wet processing process method and device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103100546A (en) * 2011-11-09 2013-05-15 昌三机电科技(苏州)有限公司 Stainless steel slag dry and wet combination treatment process
EP3037560A1 (en) * 2014-12-22 2016-06-29 Paolo Bevilacqua Method and apparatus for the valorization of steel slags
CN204982009U (en) * 2015-05-28 2016-01-20 中冶南方工程技术有限公司 Reclaiming of stainless steel slag utilizes device
CN105063258A (en) * 2015-08-30 2015-11-18 武汉福安神州建材有限公司 Stainless steel slag recycling method
CN106244748A (en) * 2016-09-14 2016-12-21 中冶华天南京工程技术有限公司 A kind of stainless steel slag wet processing process method and device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108480369A (en) * 2018-03-13 2018-09-04 郑州傲宙建材有限公司 A kind of waste residue soil cleaning screening technology
CN110355107A (en) * 2018-04-09 2019-10-22 中冶宝钢技术服务有限公司 Steel slag metal charge refines system and refining technique
CN113083492A (en) * 2021-03-30 2021-07-09 黄石市旺新环保科技有限公司 Steelmaking solid waste integrated treatment system
CN113083492B (en) * 2021-03-30 2022-09-13 黄石市旺新环保科技有限公司 Steelmaking solid waste integrated treatment system

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