CN109365106A - A kind of stainless steel slag dry type magnetic separation device and technique - Google Patents
A kind of stainless steel slag dry type magnetic separation device and technique Download PDFInfo
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- CN109365106A CN109365106A CN201811271142.6A CN201811271142A CN109365106A CN 109365106 A CN109365106 A CN 109365106A CN 201811271142 A CN201811271142 A CN 201811271142A CN 109365106 A CN109365106 A CN 109365106A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of stainless steel slag dry type magnetic separation device and techniques, belong to metallurgy and mineral engineering technology field, device includes raw material cabin, scrap steel collection device, broken screening plant and concentration equipment, concentration equipment includes magnetic separation unit, screening mechanism and abrasive material mechanism, and broken screening plant includes crushing mechanism, separating mechanism and breaks up mechanism；Technique, which includes that primary fragmentation sieves, second-time breakage is sieved and removes iron, material scattering, magnetic separation screening and secondary magnetic separation, to be separated.The present invention is in stainless steel slag treatment process, the stainless steel slag of 58-60% is not required to carry out levigate, steel slag " more broken few mills ", the choosing of dry type mill and the purpose of tailing dry row are realized, the calcium oxide content that dissociates in desulfurizing agent is improved, has expanded the desulfuration efficiency of desulfurizing agent；Water is not consumed in processing, is not required to setting Tailings Dam, shortens the technological process of production, stainless steel slag is improved and selects metal recovery rate during iron.
Description
Technical field
The invention belongs to metallurgy and mineral engineering technology fields, and in particular to a kind of stainless steel slag dry type magnetic separation device and
Technique.
Background technique
During stainless steel-making, due to the special smelting process of stainless steel, steel slag yield reaches steel for iron and steel enterprise
The 30% of yield, while stainless steel production capacity expands, the metallurgical solid association waste total amount of generation also increases year by year.It is stainless
The problems such as steel steel slag selects the tailings after iron after long-time is stored up, and has emerged dust atmosphere pollution and social benefit, and
With being continuously increased for steel slag yield, existing environmental problem and social concern become increasingly conspicuous.
Chromium nickel is presented as addition element important in stainless steel smelting process, demand with the increase of stainless steel output
The trend risen year by year.Reserves of the chromium nickel resources in China are deficienter, from domestic demand, belong to deficient resources.Phase
Comparatively, being rich in chromium nickel element in stainless steel slag, chromium nickel is recycled from stainless steel slag and has become coming for stainless steel-making raw material
One of source.Show that chromium nickel content is about 2-2.5% in stainless steel slag according to the data that domestic Stainless Steel Plant provides.Therefore, lead to
The chromium nickel resources in recycling stainless steel slag are crossed, to supplement demand of the stainless steel smelting to chromium nickel, stainless steel production cost is reduced, mentions
High Business Economic Benefit.
Currently, domestic iron and steel enterprises are using the comprehensive utilization of solid waste as the important content of circular economy and society
One long-range strategy and policy of development, and propose the environmental objective of smelter waste residue " zero " discharge, " clean manufacturing ".Steel enterprise
Industry needs to implement national development strategy, undertakes the social task of enterprise, and the sustainable development for country contributes.
Currently, stainless steel slag treatment process is broadly divided into single treatment and secondary treatment:
There are mainly two types of stainless steel slag single treatment techniques: (1) air-cooled and immersion treatment mode.Formerly air-cooled number is small for high-temperature steel slag
When, after then into steel slag, a few hours are impregnated in watering, then steel slag is carried out iron is selected to handle.(2) the bored processing mode of heat.For high temperature
It is bored to carry out slowly heat using the method for atomizing spray, is fully cooled, moistens and dusting to stainless steel slag for liquid stainless steel slag
Afterwards, then steel slag is carried out that iron is selected to handle.
Stainless steel slag secondary treatment technique: stainless steel slag first carries out break process, selects bulk metal slag, then sharp
After sub-electing stainless steel steel scrap with rod mill corase grinding and a spiral classifier, a spiral tailing, which enters ball mill, to be carried out carefully
It grinds, sub-elects finely-divided metal with secondary spiral clasfficiator again after ore grinding.The overflowing liquid of spiral enters in magnetic separator twice,
Magnetic separator concentrate returns to secondary spiral and is sorted.
Stainless steel slag secondary treatment technique use wet processing, there are the problem of have: (1) stainless steel slag is selecting iron
In the process, it needs to carry out levigate and magnetic separation to whole steel slags, levigating steel slag process energy consumption is higher, and levigate material selects the metal of iron
The rate of recovery is lower；(2) stainless steel slag wet processing process route is longer, and subsequent product processing includes slurry concentrating, filtering, takes off
The links such as water increase beneficiation cost and investment cost of founding the factory.For drought and water-scarce area, which seems especially aobvious
It writes；(3) stainless steel slag wet processed technique can generate secondary pollution, influence groundwater quality；Tailing is stored up in Tailings Dam, day
Often operation palpus preventing water leakage, dam break, in addition to increasing production cost, there is also safe and environment-friendly aspect hidden danger；Tailings Dam occupied area
Greatly, it is difficult to realize reclaim after closing library；(4) the iron ore concentrate water content obtained after stainless steel slag wet processed is higher, in severe cold
Area, concentrate storage and transportation is difficult when winter, and the portion separating plant of causing is forced to stop production, and influences economic benefit.
Currently, the dry method weak magnetic separation process that ferrous material is commonly used, since upper size boundary is up to 150mm, lower limit is general
For 3mm, and the dissociation granularity of iron mineral is mostly 0.15mm hereinafter, therefore dry separation craft is applied to pre-selection more and throws except barren rock, country rock,
It reduces into mill amount, improves Beneficiation Feed Grade, to achieve the purpose that energy conservation, consumption reduction, synergy.The procurement criteria of iron charge market demands is minimum
Grade is 60%, and the concentrate grade of dry cleaning technique rarely has generally 50% or so and reaches qualified essence under state-of-the art
The production instance of mine.
Although there is above-mentioned shortcoming in dry process, but the product after magnetic separation, without being dehydrated link, Tailings Disposal compares
Simply, conveniently, and meet the environmental protection policy that country advocates, the cost of disposal of product is greatly lowered after magnetic separation.Next is conducive to
Severe cold area winter seasonal continuous production, being conducive to drought and water-scarce area reduces beneficiation cost.Therefore dry magnetic separation technique is still
With irreplaceable advantage.
Summary of the invention
The object of the present invention is to provide a kind of stainless steel slag dry type magnetic separation device and techniques, to solve conventional wet technique
Long flow path need to consume water, high production cost, Tailings Dam and lead to the problem of secondary pollution.
In order to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of stainless steel slag dry type magnetic separation device, including raw material cabin and scrap steel collection device further include being arranged under raw material cabin
Broken screening plant and the concentration equipment that is connected to broken screening plant, the concentration equipment includes magnetic separation unit, screening machine
Structure and abrasive material mechanism, the magnetic separation unit include dry type barrel magnetic separator and dry-type magnetic extractor, screening mechanism include screening machine and
Screen banks is vibrated, abrasive material mechanism includes dry type sizes of steel balls for coarse grinding mills and dry type sizes of steel balls for coarse grinding mills, is crushed setting dry type under screening plant and rolls
The magnetic material outlet of cylinder magnetic separator, dry type barrel magnetic separator is connected with dry type sizes of steel balls for coarse grinding mills, non-magnetic material outlet and vibration
Dynamic screen banks is connected, and the discharge port of dry type sizes of steel balls for coarse grinding mills is connected with screening machine, coarse grain outlet and the dry type fine grinding ball milling of screening machine
Machine is connected, and the discharge port of dry type fine grinding ball mill is connected with dry-type magnetic extractor.
The broken screening plant includes crushing mechanism, separating mechanism and breaks up mechanism, and crushing mechanism includes that level-one is broken
Machine, separating mechanism include level-one screening machine and second level screening machine, export under the sieve of level-one screening machine and sieve upper outlet is respectively with one
Grade crusher be connected with second level screening machine, the outlet of level-one crusher is connected with raw material cabin, under the sieve of second level screening machine export and
Mechanism is broken up to be connected.Breaing up mechanism can be such that steel slag rotates breaing up in revolving drum, so that the caking materials in steel slag be made to break up.
The broken screening plant further includes artificial screening area, secondary breaker and iron remover, and artificial screening area is set to
The exit of second level screening machine, artificial screening area are connected with secondary breaker, and the discharge port of secondary breaker is connected with iron remover,
The non-ferric material outlet of iron remover is connected with mechanism is broken up, and iron material outlet is connected with scrap steel collection device.
The mechanism of breaing up is to break up revolving drum.
The level-one crusher is 300mm hydraulic breaker, and secondary breaker is 80mm hydraulic breaker.
The level-one screening machine is 300mm bar screen, and second level screening machine is 80mm cylinder vibrating screening machine.
The vibration screen banks includes 1mm vibrating screen and 5mm vibrating screen.
The iron remover is electric magnetic iron remover.
The screening machine is two-stage vibration screening machine.
A kind of stainless steel slag dry magnetic separation technology, includes the following steps:
Step 1: primary fragmentation, screening:
Stainless steel hot is boiled in a covered pot over a slow fire steel slag to be added in 300mm bar screen, the material greater than 300mm is added 300mm hydraulic breaker and carries out
Stainless steel hot is returned after broken to boil in a covered pot over a slow fire in steel slag；
Step 2: second-time breakage, screening and remove iron:
80mm cylinder vibration sieve classification is added in the material less than 300mm that step 1 is obtained, and the material greater than 80mm is transported to
Artificial screening area sorts out heavy scrap and small-sized scrap by manual sorting, and small-sized scrap addition 80mm hydraulic breaker is broken
It is transported to after broken in electric magnetic iron remover and removes blocky steel scrap；
Step 3: material scattering:
By material less than 80mm that step 2 obtains and except the steel slag after iron is by carrying out material in belt-conveying to revolving drum
It breaks up；
Step 4: a magnetic separation, screening:
The material that step 3 obtains is sorted at magnetic field strength 2500-3000 Oe by dry type barrel magnetic separator, is sub-elected
When magnetic material is added dry type sizes of steel balls for coarse grinding mills and is milled to material accounting that granularity is -1mm not less than 80%, two-stage vibration sieve is added
Screening is granulated iron, the slag steel of middle grain and the magnetic powder of particulate of coarse grain in extension set, and vibration is added in the non-magnetic material sub-elected
In screen banks, separated step by step by 1mm vibrating screen and 5mm vibrating screen；That isolates in two-stage vibration screening machine accounts for steel slag total weight
3-5% granulated iron and slag steel can be used as metal product and utilized for steelmaking converter or electric furnace；Non-magnetic material passes through 1mm vibrosieve
After grade, the non-magnetic material of particulate for obtaining the non-magnetic material of coarse grain for accounting for material total weight 23-25% and accounting for material total weight 53-58%,
The particle size range of the non-magnetic material of coarse grain is larger, after the classification of 5mm vibrating screen, obtains 5mm or more material as barren rock for mixed
Solidifying soil mixing station or roadbed are utilized, and are obtained 1-5mm material and are utilized as sand grains；The granularity of the non-magnetic material of particulate compared with
It is small, density is lower, can be used as fume desulfurizing agent or sintered material agent utilized；
Step 5: secondary magnetic separation separation:
Dry type fine grinding ball mill is added in the magnetic powder that step 4 is obtained, and is milled to the material accounting of granularity -300 not less than 80%
When, dry-type magnetic extractor magnetic separation at magnetic field strength 2200-2500 Oe is added and separates, obtains smart iron ore.Dry-type magnetic extractor sub-elects
The magnetic material for accounting for material total weight 5-7% carries out ingredient utilization for sintering as Iron concentrate, sub-elects and accounts for material total weight 9-
11% non-magnetic material is utilized as cement ingredient.
The present invention having the beneficial effect that compared to the prior art
The present invention is for the situation that block content is less, powder content is more and Iron grade is lower in stainless steel slag, to improve
Material mill select efficiency, for the higher situation of block steel slag hardness, the stainless steel slag of 58-60% be not required to carry out it is levigate, using steel
Slag " more broken few mills " technology obtains 80mm steel slag below again to therein after steel slag first passes through two-stage screening and crushing process
Agglomeration carries out breaing up processing, realizes the preliminary dissociation of magnetic material and non-magnetic material, and the steel slag tentatively dissociated passes through dry type cylinder
, it can be achieved that the separation of magnetic material and non-magnetic material, considerably reduces the place that subsequent material mill selects technique after magnetic separator sorting
Reason amount.
The present invention selects efficiency for granulated iron and the higher situation of slag steel content in magnetic material, to improve material mill, magnetic
Material is classified after a dry type ball milling is roughly ground, then using two-stage vibration sieve, can be sub-elected granulated iron and slag steel, be sub-elected
After particulate magnetism powder uses secondary dry ball fine grinding, then using dry-type magnetic extractor progress magnetic separation, Iron grade 56% can be obtained
Above iron ore concentrate.
The present invention for non-property material granularity is smaller, the higher situation of calcium oxide content, to further increase nonmagnetics
Calcium oxide content in material, the situation higher for dioxide-containing silica in coarse-grained material, hardness is larger, is classified using material size
Method, barren rock, the sandstone of middle grain and the desulfurizing agent of particulate or sintered material of coarse grain can be obtained.
In stainless steel slag treatment process, the stainless steel slag of 58-60% is not required to carry out levigate the present invention, realizes steel
Slag " more broken few mills ", the choosing of dry type mill and the purpose of tailing dry row, improve the calcium oxide content that dissociates in desulfurizing agent, have expanded desulfurization
The desulfuration efficiency of agent.
Stainless steel slag is broken through two-stage, agglomeration carries out dry type magnetic separation after breaing up, and sub-elects most of non-magnetic material not
In the case where by ore grinding, using simple sieving technology, so that it may achieve the purpose that non-magnetic material comprehensive utilization；It sub-elects a small amount of
Magnetic material carries out ball mill fine grinding after ball mill is roughly ground, screens out granulated iron and slag steel again, and levigate material is using dry type
After magnetic separator magnetic separation, granulated iron powder and cement ingredient can be obtained.
Stainless steel slag processing does not consume water, is not required to setting Tailings Dam, shortens the technological process of production, improves stainless steel steel
Slag selects metal recovery rate during iron.
The present invention, which solves stainless steel slag, can generate secondary pollution using conventional wet technique high production cost, Tailings Dam
The problem of.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Appended drawing reference meaning is as follows: 1, raw material cabin；2, it is crushed screening plant；3, concentration equipment；4, dry type barrel magnetic separator；5, it does
Formula magnetic separator；6, screening machine；7, screen banks is vibrated；8, dry type sizes of steel balls for coarse grinding mills；9, dry type fine grinding ball mill；10, level-one crusher；
11, level-one screening machine；12, second level screening machine；13, mechanism is broken up；14, artificial screening area；15, secondary breaker；16, iron is removed
Device；17, scrap steel collection device.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
As shown in Figure 1, a kind of stainless steel slag dry type magnetic separation device, including raw material cabin 1 and scrap steel collection device 17, also wrap
The concentration equipment 3 for including the broken screening plant 2 being arranged under raw material cabin 1 and being connected to broken screening plant 2, the concentration equipment
3 include magnetic separation unit, screening mechanism and abrasive material mechanism, and the magnetic separation unit includes dry type barrel magnetic separator 4 and dry-type magnetic extractor
5, screening mechanism includes screening machine 6 and vibration screen banks 7, and abrasive material mechanism includes dry type sizes of steel balls for coarse grinding mills 8 and dry type fine grinding ball mill
9, it is crushed the lower setting dry type barrel magnetic separator 4 of screening plant 2, magnetic material outlet and the dry type of dry type barrel magnetic separator 4 are roughly ground
Ball mill 8 is connected, and non-magnetic material outlet is connected with vibration screen banks 7, discharge port and 6 phase of screening machine of dry type sizes of steel balls for coarse grinding mills 8
Even, the coarse grain outlet of screening machine 6 is connected with dry type fine grinding ball mill 9, the discharge port and dry-type magnetic extractor of dry type fine grinding ball mill 9
5 are connected.
The broken screening plant 2 includes crushing mechanism, separating mechanism and breaks up mechanism 13, and crushing mechanism includes that level-one is broken
Broken machine 10, separating mechanism include level-one screening machine 11 and second level screening machine 12, export under the sieve of level-one screening machine 11 and go out on sieving
Mouth is connected with level-one crusher 10 and second level screening machine 12 respectively, and the outlet of level-one crusher 10 is connected with raw material cabin 1, second level sieve
It is exported under the sieve of extension set 12 and breaks up mechanism 13 and be connected.
The broken screening plant 2 further includes artificial screening area 14, secondary breaker 15 and iron remover 16, artificial screening area
14 are set to the exit of second level screening machine 12, and artificial screening area 14 is connected with secondary breaker 15, and secondary breaker 15 goes out
Material mouth is connected with iron remover 16, and the non-ferric material outlet of iron remover 16 is connected with mechanism 13 is broken up, and iron material outlet and steel scrap are received
Acquisition means 17 are connected.
The mechanism 13 of breaing up is to break up revolving drum.
The level-one crusher 10 is 300mm hydraulic breaker, and secondary breaker 15 is 80mm hydraulic breaker.
The level-one screening machine 11 is 300mm bar screen, and second level screening machine 12 is 80mm cylinder vibrating screening machine.
The vibration screen banks 7 includes 1mm vibrating screen and 5mm vibrating screen.
The iron remover 16 is electric magnetic iron remover.
The screening machine 6 is two-stage vibration screening machine.
A kind of stainless steel slag dry magnetic separation technology, includes the following steps:
Step 1: primary fragmentation, screening:
Select stainless steel slag: iron content 5-6%, CaO content 44-46%, content of MgO 7-9%, Cr203 content 1.5-4.5%,
Ni content 0.1-0.3%, water content 6% are added to 300mm rod with forklift after steel slag spontaneously dries hereinafter, stainless steel hot is boiled in a covered pot over a slow fire
In sieve, the material greater than 300mm is added 300mm hydraulic breaker and carries out carrying out returning charge in the stewing steel slag of return stainless steel hot after being crushed
It utilizes；
Step 2: second-time breakage, screening and remove iron:
80mm cylinder vibration sieve classification is added in the material less than 300mm that step 1 is obtained, and the material greater than 80mm is transported to
Artificial screening area sorts out heavy scrap and small-sized scrap by manual sorting, and small-sized scrap addition 80mm hydraulic breaker is broken
It is transported to after broken in electric magnetic iron remover and removes blocky steel scrap；
Step 3: material scattering:
By material less than 80mm that step 2 obtains and except the steel slag after iron in belt-conveying to revolving drum by carrying out
10-15min material scattering；
Step 4: a magnetic separation, screening:
The material that step 3 obtains is sorted at magnetic field strength 2500-3000 Oe by dry type barrel magnetic separator, is divided into and accounts for object
Expect the magnetic material of total weight 17-22% and accounts for material total weight 78-83% non-magnetic material；The magnetic material sub-elected is added dry
When formula sizes of steel balls for coarse grinding mills is milled to material accounting that granularity is -1mm not less than 80%, two-stage vibration screening machine (5mm vibrating screen is added
With 1mm vibrating screen form) in screening be coarse grain granulated iron, the slag steel of middle grain and the magnetic powder of particulate, what is sub-elected is non magnetic
Material is added in vibration screen banks, is separated step by step by 1mm vibrating screen and 5mm vibrating screen；It is isolated in two-stage vibration screening machine
Accounting for steel slag total weight 3-5% granulated iron and slag steel can be used as metal product and is utilized for steelmaking converter or electric furnace；Non-magnetic material passes through
After the classification of 1mm vibrating screen, obtains the non-magnetic material of coarse grain for accounting for material total weight 23-25% and account for the thin of material total weight 53-58%
The non-magnetic material of grain, the particle size range of the non-magnetic material of coarse grain is larger, after the classification of 5mm vibrating screen, obtains 5mm or more material work
It is utilized for barren rock for concrete mixing plant or roadbed, obtains 1-5mm material and utilized as sand grains；The non-magnetic material of particulate
Granularity is smaller, density is lower, can be used as fume desulfurizing agent or sintered material agent utilized；
Step 5: secondary magnetic separation separation:
Dry type fine grinding ball mill is added in the 1mm that step 4 is obtained particulate magnetism powder below, is milled to the material of granularity -300
When accounting is not less than 80%, dry-type magnetic extractor magnetic separation at magnetic field strength 2200-2500 Oe is added and separates, obtains smart iron ore.It is dry
Formula magnetic separator sub-elects the magnetic material for accounting for material total weight 5-7% as Iron concentrate for sintering progress ingredient utilization, sub-elects and accounts for
The non-magnetic material of material total weight 9-11% is utilized as cement ingredient.
Claims (10)
1. a kind of stainless steel slag dry type magnetic separation device, including raw material cabin and scrap steel collection device, it is characterised in that: further include setting
The concentration equipment (3) setting the broken screening plant (2) under raw material cabin (1) and being connected to broken screening plant (2), the magnetic separation
Device (3) includes magnetic separation unit, screening mechanism and abrasive material mechanism, and the magnetic separation unit includes dry type barrel magnetic separator (4) and does
Formula magnetic separator (5), screening mechanism include screening machine (6) and vibration screen banks (7), and abrasive material mechanism includes dry type sizes of steel balls for coarse grinding mills (8)
With dry type fine grinding ball mill (9), it is crushed under screening plant (2) and dry type barrel magnetic separator (4) is set, dry type barrel magnetic separator (4)
Magnetic material outlet be connected with dry type sizes of steel balls for coarse grinding mills (8), non-magnetic material export with vibrate screen banks (7) is connected, dry type is thick
The discharge port of abrading-ball grinding machine (8) is connected with screening machine (6), coarse grain outlet and dry type fine grinding ball mill (9) phase of screening machine (6)
Even, the discharge port of dry type fine grinding ball mill (9) is connected with dry-type magnetic extractor (5).
2. stainless steel slag dry type magnetic separation device as described in claim 1, it is characterised in that: the broken screening plant (2)
It including crushing mechanism, separating mechanism and breaks up mechanism (13), crushing mechanism includes level-one crusher (10), and separating mechanism includes one
Grade screening machine (11) and second level screening machine (12) exports under the sieve of level-one screening machine (11) and sieve upper outlet is crushed with level-one respectively
Machine (10) is connected with second level screening machine (12), and the outlet of level-one crusher (10) is connected with raw material cabin (1), second level screening machine (12)
Sieve under export and break up mechanism (13) and be connected.
3. stainless steel slag dry type magnetic separation device as claimed in claim 1 or 2, it is characterised in that: the broken screening plant
It (2) further include artificial screening area (14), secondary breaker (15) and iron remover (16), artificial screening area (14) are set to second level sieve
The exit of extension set (12), artificial screening area (14) are connected with secondary breaker (15), the discharge port of secondary breaker (15) with
Iron remover (16) is connected, and the non-ferric material outlet of iron remover (16) is connected with mechanism (13) is broken up, and iron material outlet and steel scrap are received
Acquisition means (17) are connected.
4. stainless steel slag dry type magnetic separation device as claimed in claim 3, it is characterised in that: described break up mechanism (13) are to beat
Dissipate revolving drum.
5. stainless steel slag dry type magnetic separation device as claimed in claim 4, it is characterised in that: the level-one crusher (10) is
300mm hydraulic breaker, secondary breaker (15) are 80mm hydraulic breaker.
6. stainless steel slag dry type magnetic separation device as claimed in claim 5, it is characterised in that: the level-one screening machine (11) is
300mm bar screen, second level screening machine (12) are 80mm cylinder vibrating screening machine.
7. stainless steel slag dry type magnetic separation device as claimed in claim 6, it is characterised in that: the vibration screen banks (7) includes
1mm vibrating screen and 5mm vibrating screen.
8. stainless steel slag dry type magnetic separation device as claimed in claim 7, it is characterised in that: the iron remover (16) is electromagnetism
Iron remover.
9. stainless steel slag dry type magnetic separation device as claimed in claim 8, it is characterised in that: the screening machine (6) is two-stage
Vibrating screening machine.
10. a kind of technique using the stainless steel slag dry type magnetic separation device any in claim 1-8, it is characterised in that packet
Include following steps:
Step 1: primary fragmentation, screening:
Stainless steel hot is boiled in a covered pot over a slow fire steel slag to be added in 300mm bar screen, the material greater than 300mm is added 300mm hydraulic breaker and carries out
Stainless steel hot is returned after broken to boil in a covered pot over a slow fire in steel slag；
Step 2: second-time breakage, screening and remove iron:
80mm cylinder vibration sieve classification is added in the material less than 300mm that step 1 is obtained, and the material greater than 80mm is transported to
Artificial screening area sorts out heavy scrap and small-sized scrap by manual sorting, and small-sized scrap addition 80mm hydraulic breaker is broken
It is transported to after broken in electric magnetic iron remover and removes blocky steel scrap；
Step 3: material scattering:
By material less than 80mm that step 2 obtains and except the steel slag after iron is by carrying out material in belt-conveying to revolving drum
It breaks up；
Step 4: a magnetic separation, screening:
The material that step 3 obtains is sorted at magnetic field strength 2500-3000 Oe by dry type barrel magnetic separator, is sub-elected
When magnetic material is added dry type sizes of steel balls for coarse grinding mills and is milled to material accounting that granularity is -1mm not less than 80%, two-stage vibration sieve is added
Screening is granulated iron, the slag steel of middle grain and the magnetic powder of particulate of coarse grain in extension set, and vibration is added in the non-magnetic material sub-elected
In screen banks, separated step by step by 1mm vibrating screen and 5mm vibrating screen；
Step 5: secondary magnetic separation separation:
Dry type fine grinding ball mill is added in the magnetic powder that step 4 is obtained, and is milled to the material accounting of granularity -300 not less than 80%
When, dry-type magnetic extractor magnetic separation at magnetic field strength 2200-2500 Oe is added and separates, obtains smart iron ore.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811271142.6A CN109365106A (en) | 2018-10-29 | 2018-10-29 | A kind of stainless steel slag dry type magnetic separation device and technique |
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| CN201811271142.6A CN109365106A (en) | 2018-10-29 | 2018-10-29 | A kind of stainless steel slag dry type magnetic separation device and technique |
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| CN109811095A (en) * | 2019-03-01 | 2019-05-28 | 西安交通大学 | A regenerative stainless steel slag waste heat recovery device and method |
| CN109909159A (en) * | 2019-04-24 | 2019-06-21 | 连云港金红矿业有限公司 | A kind of garnet efficient combination magnetic separation screening plant and technique |
| CN110216009A (en) * | 2019-06-18 | 2019-09-10 | 周涛 | A kind of dressing method of steel slag |
| CN110292979A (en) * | 2019-06-20 | 2019-10-01 | 四川省兴威钒业有限公司 | A kind of steel slag production line proposes production method |
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| CN115846046A (en) * | 2022-11-30 | 2023-03-28 | 中冶京诚工程技术有限公司 | Method for sorting metal slag |
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