CN102321805B - Solid chromium dreg treatment method and treatment equipment - Google Patents
Solid chromium dreg treatment method and treatment equipment Download PDFInfo
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- CN102321805B CN102321805B CN201110200600.9A CN201110200600A CN102321805B CN 102321805 B CN102321805 B CN 102321805B CN 201110200600 A CN201110200600 A CN 201110200600A CN 102321805 B CN102321805 B CN 102321805B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention relates to solid chromium dreg treatment method which comprises the steps that: solid chromium dregs are crushed and shaped; the crushed and shaped solid chromium dregs are separated to respectively obtain chromium-containing particles and dreg particles; the dreg particles are sorted to respectively obtain the chromium-containing particles and finished aggregate; the invention also provide solid chromium dreg treatment equipment comprising a crushing and shaping device, a separation device and a sorting device; the crushing and shaping equipment is used for crushing and shaping the solid chromium dregs; the separation device is used for separating the crushed and shaped solid chromium dregs to respectively obtain the chromium-containing particles and the dreg particles; and the sorting device is used for sorting the dreg particles to obtain the chromium-containing particles and the finished aggregate. The invention has a simple process, has good recovery quality, the recovered materials are cleaned, the grain size is moderate and uniform and the hardness is high through four processes, i.e. crushing, shaping, separation, sorting and the like; and in addition, the invention protects the environment, saves resources, realizes the sustainable utilization of the resources, has low production cost, is used for construction projects, and reduces the project price.
Description
Technical field
The present invention relates to the technology of waste residue processing, be specially treatment process and the treatment facility thereof of solid chromium dreg.
Background technology
When being smelting chromium irons, chromium slag produces a solid slag, by 2003, China has stored up more than 450 ten thousand tons of chromium slags, and still increasing with the speed that exceedes 400,000 tons every year, become first of the severe contamination of China's chemical industry, if these solid slags are not processed timely and effectively, will cause great harm to environment and human health.In order to reduce this pollution and harm, be the direction that investigator makes great efforts to the processing of chromium slag always, in recent years, the processing research of chromium slag be mainly to recycling treatment, it is integrated application, to after chromic wastes disposal, be applied to other industry, but, due to chromic wastes disposal program complexity, shape, big or small heterogeneity after processing, the problems such as hardness is inadequate, make it in application, run into very big difficulty, and processing cost are larger.
Summary of the invention
The invention provides a kind of solid chromium dreg treatment process and treatment facility, can process easily and effectively solid chromium dreg.
The invention provides a kind of solid chromium dreg treatment process, comprise the steps:
By solid chromium dreg fragmentation, shaping;
Solid chromium dreg after fragmentation, shaping is separated and obtained respectively containing chromium grain and slag particle; Described in sorting, slag particle obtains respectively containing chromium grain and finished aggregate.
Described fragmentation can be carried out once or secondary or repeatedly, and/or disintegrating apparatus can adopt jaw crusher and/or impact breaker to carry out, and/or impact breaker can play the effect of shaping simultaneously.
Can adopt magnetic separator to carry out described separation.
Described sorting can be carried out once or secondary or repeatedly, and/or size separation equipment can adopt separator and/or oscillating separator, preferably adopts oscillating separator.
Before described sorting, and/or after can adopt wet washer to wash to slag particle.
Preferably carry out twice sorting, the chromium slag particle size that primary election obtains is generally 0-20mm and/or 20-50mm.
The size of the described finished aggregate that choosing obtains is eventually generally 0-4mm and/or 4-20mm and/or 20-40mm.
The present invention also provides a kind of solid chromium dreg treatment facility, comprising:
Fragmentation and apparatus for shaping, for fragmentation, the shaping of solid chromium dreg;
Tripping device, for separating the solid chromium dreg after fragmentation, shaping to obtain respectively containing chromium grain and slag particle;
Sorting unit, for slag particle described in sorting, obtains containing chromium grain and finished aggregate.
Described fragmentation and apparatus for shaping can comprise jaw crusher, impact breaker, impact crusher, hammer mill, wheel roller, ball mill, rod mill, one or more of vibrating mill and jet mill, ring-roller mill, cone crusher, roller crusher;
Described tripping device can comprise one or more of magnetic separator, gravity separator, wet washer;
Described sorting unit can involving vibrations separator, sifting machine, one or more of spiral, vortex sorting machine.
Further can also comprise:
Wet washer, for washing slag particle before described sorting and/or after described sorting.
By solid chromium dreg treatment process provided by the invention and treatment facility, can utilize simple procedures to carry out efficient recovery processing to solid chromium dreg, reclaim particle shape regular, even, save energy, reduce environmental pollution, fully realize the economic worth that solid chromium dreg waste is new, and combine with construction industry, further saved construction cost.Wherein, can reach following beneficial effect:
One, technique is simple, recovery quality is good, the present invention is by Four processes such as fragmentation, shaping, separation, sortings, finally obtain the finished aggregate that 0-4mm or 4-20mm or 20-40mm etc. meet material of construction different-grain diameter needs, regenerant is totally without dust foreign material, and granularity is evenly upright, and hardness is large, meet building needs completely, the high quality that simple technique has realized solid chromium dreg reclaims, and tooling cost is low, and solid chromium dreg regenerant use value is high;
Two, protection of the environment; economize on resources; realize the sustainable use of resource, realize the recycling completely of solid chromium dreg, solid chromium dreg can obtain after treatment containing chromium grain and ground-slag grain; wherein again sell containing chromium grain; ground-slag grain is applied in construction work, has both reduced environmental pollution, fully recycles again waste solid chromium slag; realize the sustainable application of resource, reduced construction cost simultaneously.
Embodiment
To the technical scheme of the embodiment of the present invention be carried out to clear, complete description below, obviously, described embodiment is only one embodiment of the present of invention, rather than whole embodiment.Based on the embodiment in the present invention, all other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belong to the scope that the present invention protects.
The invention provides a kind of method of solid chromium dreg processing, comprise the steps: solid chromium dreg fragmentation, shaping; Solid chromium dreg after fragmentation, shaping is separated and obtained respectively containing chromium grain and slag particle; Described in sorting, slag particle obtains respectively containing chromium grain and finished aggregate, containing chromium grain as ferrochrome product sell, finished aggregate is for construction work, such as aggregate, cement, because hardness can also be used for greatly the product etc. of similar silicon carbide.
Described fragmentation can be carried out once or secondary or repeatedly, thereby guarantees that solid chromium dreg obtains good fragmentation, even particle size.
Disintegrating apparatus can adopt jaw crusher and/or impact breaker to carry out.
Impact breaker can carry out shaping simultaneously, and the slag particle shape that does not meet next step processing or aggregate applied environment is carried out to further shaping, such as: slag particle is prolate shape, the side's of being shaped as brachmorphy etc.
The preferred secondary of broken number of times, first adopts jaw crusher to carry out fragmentation, then utilizes impact breaker to carry out fragmentation and shaping, particle is less on the one hand, granule regularizing Du Genggao on the other hand, particle is comparatively upright, after suitable processing below and recovery in the application of other field.Described fragmentation and shaping can also adopt impact crusher, hammer mill, wheel roller, ball mill, rod mill, and vibrating mill and jet mill, ring-roller mill, cone crusher, and/or one or more of the equipment such as roller crusher carry out.
Described separation can adopt one or more of magnetic separator, gravity separator, composition to solid chromium dreg separates, according to the different centrifugal force in magnetic field of heterogeneity in solid chromium dreg, obtain respectively containing chromium grain and slag particle, after separating, can be used as ferrochrome product application containing chromium grain, slag particle enters next stage treatment facility.
Described sorting can be carried out once or secondary or repeatedly, the number of times of sorting is preferably twice.
Size separation equipment can adopt common separator and/or oscillating separator, preferably oscillating separator, and first slag particle grain enters separator and carries out preliminary sorting, obtains the slag particle obtaining containing chromium grain and primary election; Then the slag particle that primary election obtains enters oscillating separator again, and by vibration, further sorting, obtains containing ferrochrome grain and select slag particle, described end to select slag particle to be described finished aggregate eventually.Described sorting can also adopt sifting machine, spiral, gravity separator, vortex sorting machine.And/or the equipment such as wet washer carries out.
Before described sorting, and/or after can adopt wet washer to wash to slag particle, by washing, can further purify, remove impurity.
Preferably carry out twice sorting, the chromium slag particle size that primary election obtains is generally 0-20mm, and/or 20-50mm, sieves and can obtain the chromium slag particle of different-grain diameter.
The size of described finished aggregate is generally 0-4mm, and/or 4-20mm, and/or 20-40mm, sieves and can obtain the finished aggregate of different-grain diameter, for different building fields.
The present invention also provides the solid chromium dreg treatment facility that utilizes described solid chromium dreg treatment process, comprises broken and apparatus for shaping, tripping device and sorting unit.
Described fragmentation and apparatus for shaping are for fragmentation, the shaping of solid chromium dreg;
Described tripping device is for separating the solid chromium dreg after fragmentation, shaping to obtain respectively containing chromium grain and slag particle;
Described sorting unit, for slag particle described in sorting, obtains containing chromium grain and finished aggregate.
Broken and apparatus for shaping can comprise jaw crusher, impact breaker, impact crusher, hammer mill, wheel roller, ball mill, rod mill, one or more in vibrating mill and jet mill, ring-roller mill, cone crusher, roller crusher; Preferred jaw crusher and the impact breaker of adopting, wherein impact breaker not only can fragmentation but also can shaping, first adopt jaw crusher to carry out fragmentation, then utilize impact breaker to carry out fragmentation and shaping, particle is less on the one hand, granule regularizing Du Genggao on the other hand, particle is comparatively upright, after suitable processing below and recovery in the application of other field.
Described tripping device can comprise magnetic separator, and/or gravity separator, and/or wet washer, preferably magnetic separator, composition to solid chromium dreg separates, and according to the different centrifugal force in magnetic field of heterogeneity in solid chromium dreg, obtains containing chromium grain and slag particle, after separating, can be used as ferrochrome product application containing chromium grain, slag particle enters next stage treatment facility.
Described sorting unit can involving vibrations separator, sifting machine, one or more of spiral, vortex sorting machine.Preferably oscillating separator, described sorting can be carried out once or secondary or repeatedly, is preferably twice, and first slag particle enters separator and carries out preliminary sorting, obtains the slag particle obtaining containing chromium grain and primary election; Then the slag particle that primary election obtains enters oscillating separator again, and by vibration, further sorting, obtains containing ferrochrome grain and select slag particle, described end to select slag particle to be described finished aggregate eventually.
Further can also comprise:
Wet washer, for washing slag particle before described sorting and/or after described sorting.By washing, can further purify, remove impurity.
Under normal circumstances, the number of times of sorting is preferably twice, and the chromium slag particle size that primary election obtains is generally 0-20mm and/or 20-50mm, and the size of described finished aggregate is generally 0-4mm and/or 4-20mm and/or 20-40mm.
One of them specific embodiment is: after several chromite ore fines are mixed, put into mineral hot furnace and be heated to 2000 ℃ of left and right, then the melting such as coke, serpentine auxiliary agent is joined in mineral hot furnace, mix smelting and obtain ferrochrome and chromium slag; The chromium slag obtaining is carried out to the cooling solid chromium dreg that obtains; Cooled solid chromium dreg is sent into jaw crusher and is carried out primary fragmentation; Then sending into impact breaker by conveying belt carries out secondary breaking shaping, obtains that particle is less, shape slag particle comparatively uniformly; Slag particle after shaping enters magnetic separator, carries out feed separation according to the difference of material centrifugal force, separation place containing chromium grain and and slag particle; The slag particle that magnetic separation obtains is admitted to separator and carries out first sorting, obtains the pellet that particle diameter is 0-20mm and/or 20-50mm, sub-elects containing chromium grain and the slag particle just selected simultaneously; Enter subsequently wet washer through the slag particle of first sorting and wash, further remove impurity through fully washing; Slag particle after washing enters oscillating separator and carries out secondary sorting, and further obtains containing chromium grain and slag particle powder, and described slag particle powder is finished aggregate, sieves, and can obtain the finished aggregate of 0-4mm or 4-20mm or 20-40mm.
It is low that solid chromium dreg of the present invention reclaims tooling cost, reclaims quality high.Regenerant, finished aggregate is totally without dust foreign material, and granularity is evenly upright, and hardness is large, also higher than the hardness of river sand, pebbles.
The present invention has reached whole recovery of solid chromium dreg, and the chromium grain that contains of recovery accounts for 1% of solid chromium dreg substantially.
Finished aggregate is as aggregate, and July 7 in 2009, radioassay did in ceramic product Quality Supervision and Inspection Center of Nikkei Sichuan Province: interior is 0.1 according to radiation index Ira measured result, is less than national category-A material and must be less than or equal to 1.0 technical requirements; Outer is 0.2 according to radiation index IY measured result, is less than national category-A material and must be less than 1.3 technical requirements, and this material meets the requirement of national category-A material technology, and finishing material production and marketing and use range are unrestricted.
On July 31st, 2009, do concrete mix laboratory report result through Leshan Highway Test inspection center and be:
| Design strength (Mpa) | Real inspection ultimate compression strength (Mpa) (7 days) | Real inspection ultimate compression strength (Mpa) (28 days) |
| C25 | 23.5 | 32.0 |
| C30 | 23.8 | 33.2 |
Assert it is good aggregate through relevant expert.
Finished aggregate is used widely architectural: can be for material of construction, for engineering constructions such as road, factory's terrace, barricade bridges; Be used for gunite work etc., not only resistance to compression, freeze proof, and also with low cost, economize on resources, realize the sustainable use of resource.
By solid chromium dreg treatment process provided by the invention and treatment facility; can utilize simple procedures to carry out efficient recovery processing to solid chromium dreg; reclaim particle shape regular, even; save energy; reduce environmental pollution; fully realize the economic worth that solid chromium dreg waste is new; by reclaiming solid chromium dreg waste; further protection of the environment; both reduce environmental pollution, fully recycled again discarded object chromium slag, realized the sustainable application of resource; solid chromium dreg of the present invention combines with construction industry, reduces construction engineering cost simultaneously.
Wherein, can reach following beneficial effect:
One, technique is simple, recovery quality is good, the present invention is by Four processes such as fragmentation, shaping, separation, sortings, finally obtain the finished aggregate that 0-4mm or 4-20mm or 20-40mm etc. meet material of construction different-grain diameter needs, regenerant is totally without dust foreign material, and granularity is evenly upright, and hardness is large, meet building needs completely, the high quality that simple technique has realized solid chromium dreg reclaims, and tooling cost is low, and solid chromium dreg regenerant use value is high;
Two, protection of the environment; economize on resources; realize the sustainable use of resource, realize the recycling completely of solid chromium dreg, solid chromium dreg can obtain after treatment containing chromium grain and ground-slag grain; wherein again sell containing chromium grain; ground-slag grain is applied in construction work, has both reduced environmental pollution, fully recycles again waste solid chromium slag; realize the sustainable application of resource, reduced construction cost simultaneously.
It should be noted that: after two or more chromite ore fine is mixed, put into mineral hot furnace and heat; When temperature reaches 2000 ℃ of left and right in mineral hot furnace, in described mineral hot furnace, add melting auxiliary agent, melting, obtains ferrochrome and chromium slag; Coolingly obtain described solid chromium dreg, when described solid chromium dreg is processed, in separation or assorting room, partial impurities can be obtained, such as containing arsenic impurities, containing chromium impurity, mineral hot furnace can be back to use, use as chrome ore raw material or fusing assistant, such as, can be used as fusing assistant, can be used as raw material reuse containing chromium impurity containing arsenic impurities, profit can more effectively be recycled in this way, reach the effect of recycle, thereby reduced production cost.
Embodiment provided by the invention combination mutually in any way as required, the technical scheme obtaining by this combination, also within the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also comprises these changes and modification interior.
Claims (7)
1. a solid chromium dreg treatment process, is characterized in that, comprises the steps:
After mixing by two or more chromite ore fine and containing chromium impurity, put into mineral hot furnace and heat, when temperature reaches 2000 ℃ in mineral hot furnace, in described mineral hot furnace, add melting auxiliary agent, melting, obtains ferrochrome and chromium slag, the cooling solid chromium dreg that obtains; Adopt jaw crusher that described solid chromium dreg fragmentation, employing impact breaker are carried out to shaping, by the prolate shape side of being shaped as brachmorphy;
Adopt tripping device that the solid chromium dreg after fragmentation, shaping is separated and obtained respectively containing chromium grain and slag particle;
Described in the sorting of employing sorting unit, slag particle obtains respectively containing chromium grain and finished aggregate;
Described melting auxiliary agent is coke, serpentine and contains arsenic impurities;
Described containing chromium impurity with separated or described assorting room produces by described containing arsenic impurities;
The slag particle that primary election obtains is of a size of 0-20 ㎜ and/or 20-50 ㎜, and/or the described finished aggregate that choosing obtains is eventually of a size of 0-4 ㎜ and/or 4-20 ㎜ and/or 20-40 ㎜.
2. solid chromium dreg treatment process as claimed in claim 1, is characterized in that, described fragmentation is carried out once or secondary or repeatedly.
3. solid chromium dreg treatment process as claimed in claim 1 or 2, is characterized in that, adopts magnetic separator to carry out described separation.
4. solid chromium dreg treatment process as claimed in claim 1, is characterized in that, adopts oscillating separator to carry out sorting, and described sorting is carried out once or secondary or repeatedly.
5. the solid chromium dreg treatment process as described in any one in claim 1, is characterized in that, before described sorting and/or after described sorting, slag particle is washed.
6. solid chromium dreg treatment process as claimed in claim 1, is characterized in that, described tripping device comprises one or more of magnetic separator, gravity separator, wet washer;
And/or one or more of described sorting unit involving vibrations separator, sifting machine, spiral, vortex sorting machine.
7. solid chromium dreg treatment process as claimed in claim 6, is characterized in that, further comprises: wet washer, and for slag particle being washed before described sorting and/or after described sorting.
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| CN102806133B (en) * | 2012-08-23 | 2015-01-14 | 中铁五局（集团）有限公司 | Machine-made sand processing process |
| CN108246491A (en) * | 2018-01-25 | 2018-07-06 | 包头钢铁（集团）有限责任公司 | The process of fine chrome mine is recycled in a kind of gravity tailings of high-carbon chrome iron for smelting wet slag |
| CN110779338B (en) * | 2019-11-07 | 2021-04-06 | 山东华顺环保科技股份有限公司 | Method for treating slag of iron and steel smelting furnace |
| CN113831043B (en) * | 2021-09-30 | 2022-12-13 | 西南科技大学 | Comprehensive utilization method of chrysotile mine stripped waste stone and building material thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1227202A (en) * | 1998-12-18 | 1999-09-01 | 锦州铁合金工商实业公司冶金建材厂 | Technical process for producing refractory material Al-Cr brick by using chromium smelting sludge |
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| CN102092975B (en) * | 2010-12-08 | 2013-01-16 | 浙江工业大学 | Method for preparing concrete aggregate from waste incineration ash |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1227202A (en) * | 1998-12-18 | 1999-09-01 | 锦州铁合金工商实业公司冶金建材厂 | Technical process for producing refractory material Al-Cr brick by using chromium smelting sludge |
Non-Patent Citations (2)
| Title |
|---|
| 从炭素铬铁渣中回收金属的研究;邱伟坚;《铁合金》;19981231(第1期);28-30 * |
| 邱伟坚.从炭素铬铁渣中回收金属的研究.《铁合金》.1998,(第1期), |
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