CN102816925A - Method and system for recycling iron-containing sludge - Google Patents
Method and system for recycling iron-containing sludge Download PDFInfo
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- CN102816925A CN102816925A CN2012103064951A CN201210306495A CN102816925A CN 102816925 A CN102816925 A CN 102816925A CN 2012103064951 A CN2012103064951 A CN 2012103064951A CN 201210306495 A CN201210306495 A CN 201210306495A CN 102816925 A CN102816925 A CN 102816925A
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Abstract
The invention discloses a method for recycling iron-containing sludge. The method comprises the following steps of: premixing high-calcium ion-containing fly ash with iron-containing sludge to generate a mixture 1 and enabling the mixture 1 to carry out digestion reaction to generate a mixture II, wherein the premixed high-calcium ion-containing fly ash contains free calcium oxide; and granulating the mixture II. According to the method disclosed by the invention, the centralized treatment, reasonable mixing, uniform mixing and all recycling and sintering of various dust and sludge are realized and the problem of homogenization of direct recycling and sintering of dust and sludge is solved. The method has the advantages of strong adaptability, favorable operation environment, no secondary pollution and the like and is suitable for recycling various ferrous metallurgy dust and sludge.
Description
Technical field
The present invention relates to the useless admittedly comprehensive utilization of resources recovery technology field of ferrous metallurgy industry, method and system thereof that particularly a kind of iron containing sludge is recycled.
Background technology
Iron and steel enterprise can produce the various ferrous metallurgy sludges that are approximately output of steel about 10% in production processes such as raw material, ironmaking, steel-making and steel rolling, comprise OG mud, converter dry method dust ash, iron scale, sleeve kiln ash, gas ash and power mud etc.These ferrous metallurgy sludges belong to the recyclable resource of utilizing mostly.At present, a ferrous metallurgy sludge part realizes its recycle in enterprises with direct reuse agglomerating mode, but because physical behavior and composition fluctuation are bigger; Reasons such as the difficulty that homogenizes height; Influence the ordinary production of sintering process, limited the recycling of ferrous metallurgy sludge, often have a big chunk and efflux; This has not only caused the waste of resource, and serious pollution environment.
Present existing technology about the ferrous metallurgy sludge comprehensive utilization does not also propose to adapt to the problem that homogenizes that various ferrous metallurgy mud resources are recycled, that solution dirt mud direct reuse sintering faces, and the method that can implement to promote.
Summary of the invention
Technical problem to be solved by this invention provides the method that a kind of iron containing sludge is recycled, and solves that prior art recycles that the iron containing sludge kind is few, ion dust mud contaning reclaims directly that sintering faces is difficult to homogenize and problem that high calcium iron content dedusting ash is difficult to recycle.
For solving the problems of the technologies described above; The invention provides the method that a kind of iron containing sludge is recycled; Comprise: pre-mixing high calcium iron content dedusting ash and iron containing sludge generate mixture one; And making said mixture one carry out digestion reaction generation mixture two, wherein said high calcium iron content dedusting ash contains free calcium oxide; Said mixture two is carried out granulation.
For solving the problems of the technologies described above; The system that the present invention also provides a kind of iron containing sludge to recycle; The method of utilizing above-mentioned iron containing sludge to recycle, it comprises the high calcium iron content dedusting ash feed proportioning system, pre-mixing Digestive tract and the disk granulating system that are linked in sequence according to the Flow of Goods and Materials direction, the iron containing sludge feed proportioning system that is connected with said pre-mixing Digestive tract in addition.
Method and system thereof that iron containing sludge provided by the invention is recycled; After high calcium iron content dedusting ash and iron containing sludge pre-mixing and carrying out abundant digestion reaction; Concentrate with other additive and the metallurgical ash behind watering and lowering dust again and mix; Solved the ferrous metallurgy sludge problem that homogenizes, accomplished that in advance various dirt mud reuse agglomerating compositions are uniform and stable, avoided causing sinter quality is had a negative impact; Also solved ferrous metallurgy sludge prilling problem simultaneously, accomplished in advance various dirt mud are processed into the needed particle scale of sintering, avoided causing aspects such as sinter quality, SINTERING PRODUCTION efficient and sinter machine dust removing effects are had a negative impact.
Description of drawings
The process flow sheet of the method that the iron containing sludge that Fig. 1 provides for the embodiment of the invention is recycled;
The schema of the system that the iron containing sludge that Fig. 2 provides for the embodiment of the invention is recycled.
Embodiment
Referring to Fig. 1, the method that a kind of iron containing sludge that the embodiment of the invention provides is recycled comprises:
Pre-mixing high calcium iron content dedusting ash and iron containing sludge generate mixture one, and make mixture one carry out digestion reaction generation mixture two, and wherein high calcium iron content dedusting ash contains free calcium oxide, and this free calcium oxide will be cleared up in the digestion reaction process; Mixture two is carried out granulation.
Wherein, the method that this iron containing sludge is recycled also comprises additive concentrated with mixture two and mixes generation mixture three; Mixture three is carried out granulation; Wherein, additive is in the slag slag steel purification process, the slag steel purification tail mud that utilizes the wet-type ball mill ball milling to produce; Water ratio is 30-40%; The tail mud that produces in the wet ball-milling process, it is 0.5%-2% with addition of amount, adds the intensity that the granulation of slag steel purification tail mud can improve particulate material.
Wherein, the method that this iron containing sludge is recycled also comprises mixes concentrating with mixture two or mixture three through other metallurgical dedusting ash of watering and lowering dust, correspondingly generates mixture four or mixture five respectively; Mixture four or mixture five are carried out granulation.
Wherein, the method recycled of this iron containing sludge also comprises the product after the granulation is sieved.
Referring to Fig. 2; The system that the embodiment of the invention also provides a kind of iron containing sludge to recycle; The method of using above-mentioned iron containing sludge to recycle comprises the high calcium iron content dedusting ash feed proportioning system, pre-mixing Digestive tract and the disk granulating system that are linked in sequence according to the material working direction, the iron containing sludge feed proportioning system that is connected with the pre-mixing Digestive tract in addition; High calcium iron content dedusting ash feed proportioning system 1 comprises 1# chapelet, dry ash warehouse, star-shaped ash unloading valve, spiral is claimed and scraper conveyor; Iron containing sludge feed proportioning system 2 comprises storage hopper, mud outflow machine and belt and claims; Pre-mixing Digestive tract 5 comprises biaxial rneader, 1# rotary conveyor, 2# chapelet, slaking silos, disk feeder and 3# rotary conveyor; Disk granulating system 7 comprises granulating slow towards feed bin, disk feeder and granulating disc; Simultaneously; High calcium iron content dedusting ash feed proportioning system is connected with the biaxial rneader of pre-mixing Digestive tract through scraper conveyor, and the iron containing sludge feed proportioning system is claimed to be connected with the biaxial rneader of pre-mixing Digestive tract through belt.
Wherein, The system that this iron containing sludge is recycled also comprises concentrated mixing system 6; It comprises 2# rotary conveyor, biaxial rneader and 4# rotary conveyor; Pre-mixing Digestive tract 5 is connected with the biaxial rneader of concentrated mixing system 6 through the 3# rotary conveyor, concentrates mixing system 6 to be connected with granulating disc through the 4# rotary conveyor.
Wherein, the system that this iron containing sludge is recycled also comprises additive formulations system 3, and its biaxial rneader with concentrated mixing system 6 is connected.
Wherein, the system that this iron containing sludge is recycled also comprises other the metallurgical dedusting ash feed proportioning systems 4 through watering and lowering dust, and it comprises hopper, disk feeder and belt and claims, and is connected with the biaxial rneader of concentrated mixing system 6 through the 2# rotary conveyor.
Principle of work in the face of present embodiment combines Fig. 2 to be described below down:
High calcium iron content dedusting ash is meant in the embodiment of the invention: contain the iron content dedusting ash of free calcium oxide, CaO content is for example made steel converter dry method dust ash, final dusting ash of dry-dedusting system output etc. greatly between 10%-60%; Iron containing sludge is meant OG mud, the gas mud of wet dedusting output, and water cut is at 30-50%; Additive is the tail mud that produces in the slag steel purification wet ball-milling process, and water cut is at 20-30%, and it is 0.5-2% with addition of amount; Other metallurgical dedusting ash are the dedusting ash through watering and lowering dust, and water ratio is at 10%-15%.
High calcium iron content dedusting ash is promoted to the dry ash warehouse through feed proportioning system 1 by the 1# bucket elevator, unloads ash by the star-shaped ash unloading valve at the bottom of the storehouse, claims quantitatively custody transfer to pre-mixing Digestive tract 5 through spiral;
Iron containing sludge is through feed proportioning system 2, and to the mud hopper, the mud outflow machine mud extraction of process mud feed hopper bottom deserves to be called to belt and quantitatively is transported to mixture slaking system 5 by forklift truck lifts;
A kind of granulation with additive through additive formulations system 3 by forklift truck lifts to the mud hopper, together allocate pre-mixing Digestive tract 5 into metallurgical dedusting mud;
High calcium iron content dedusting ash, iron containing sludge be at first process biaxial rneader mixing stirring in pre-mixing Digestive tract 5; The back is transported in the 2# chapelet by the 1# rotary conveyor; Through the 2# chapelet be promoted to carry out abundant digestion reaction in the slaking silos after; Disk feeder by being positioned at the slaking silos bottom is expected the 3# rotary conveyor, is delivered to then to concentrate mixing system 6;
Other metallurgical ashes rise to storage hopper through feed proportioning system 4 by overhead traveling crane, and the disk feeder even feeding of process feed hopper bottom is transported to concentrated mixing system 6 through the 2# conveyor after deserving to be called quantitatively to belt;
Plaster is stirred by biaxial rneader in concentrated mixing system 6, also can adopt damp mill, intensive mixer etc., and dirt mud mixes after the 4# rotary conveyor in the system 6 is transported to granulating disc system 7;
Mixed dirt mud gets into the buffering feed bin of granulating disc system 7, is expected on the outfeed belt through the disk feeder of buffering feed bin bottom, and is transported to the granulating disc granulation, and the particulate material after the granulation gets into product screening system 8;
Dirt mud particulate material is sieved by the trommel screen at 5# conveyor delivery to product feed bin top, and the screen overflow material returns concentrates mixing system 6, and the down qualified particulate material of sieve gets into the product stock storehouse, and the quadrant valve through the warehouse bottom is dumped into automobile, and to be transported to sintering plant subsequent use.
Centralized dust-removing system 10 adopts the sack cleaner dedusting, collects pre-mixing Digestive tract 5, concentrates mixing system 6, disk to make the dust that upright machine system 9 produces.
Method and system thereof that the iron containing sludge that the embodiment of the invention provides is recycled have the following advantages:
The first, solved the ferrous metallurgy sludge problem that homogenizes, accomplished that in advance various dirt mud reuse agglomerating compositions are uniform and stable, avoided causing sinter quality is had a negative impact;
The second, solved ferrous metallurgy sludge prilling problem, accomplished in advance various dirt mud are processed into the needed particle scale of sintering, avoided causing aspects such as sinter quality, SINTERING PRODUCTION efficient and sinter machine dust removing effects are had a negative impact;
Three, utilize the free calcium oxide in the high calcium iron content dedusting ash to digest iron containing sludge; So both can practice thrift lime; Can utilize the water in the iron containing sludge again, the water distribution quantity when reducing sintering and using high calcium iron content dedusting ash merely, simultaneously can also be in digestive process with all with addition of the iron content dedusting ash carry out wetting; Clear up the free calcium oxide in the high calcium iron content dedusting ash, improve the effect of granulation;
Four, the digestion material before the granulation is used for sintering and can improves sintering technology and economic indicator, improves sinter quality;
Five, in pelletization, allocated the tail mud that produces in the slag steel purification wet ball-milling process into as additive, solved the recycling problem of slag steel purification tail mud, reduced of the pollution of slag steel tail mud environment;
Six, abandoned the high pressure nodulizer granulation of traditional granulation process, and used the granulating disc granulation, the disk pelletizing facility have: balling ratio is high, balling technique is simple, energy consumption is low, advantages such as balling-up intensity height, epigranular.
It should be noted last that; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to instance the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the spirit and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. the method that iron containing sludge is recycled is characterized in that, comprises:
Pre-mixing high calcium iron content dedusting ash and iron containing sludge generate mixture one, and make said mixture one carry out digestion reaction generation mixture two, and wherein said high calcium iron content dedusting ash contains free calcium oxide; Said mixture two is carried out granulation.
2. the method that iron containing sludge as claimed in claim 1 is recycled is characterized in that, also comprises additive concentrated with said mixture two to mix generation mixture three; Said mixture three is carried out granulation.
3. the method that iron containing sludge as claimed in claim 2 is recycled is characterized in that said additive is the tail mud that produces in the slag steel purification wet ball-milling process.
4. the method recycled of according to claim 1 or claim 2 iron containing sludge is characterized in that, also comprises other metallurgical ashes, promptly concentrates with said mixture two through the dedusting ash of watering and lowering dust and mixes, generation mixture four; Said mixture four is carried out granulation.
5. the method recycled of according to claim 1 or claim 2 iron containing sludge is characterized in that, also comprises the product after the granulation is sieved.
6. the system that recycles of an iron containing sludge; It is characterized in that; The method of using iron containing sludge according to claim 1 or claim 2 to recycle comprises the high calcium iron content dedusting ash feed proportioning system, pre-mixing Digestive tract and the disk granulating system that are linked in sequence according to the material working direction, the iron containing sludge feed proportioning system that is connected with said pre-mixing Digestive tract in addition.
7. the system that iron containing sludge as claimed in claim 6 is recycled is characterized in that, also comprises concentrated mixing system, is connected with the disk granulating system with said pre-mixing Digestive tract respectively before and after it.
8. the system that iron containing sludge as claimed in claim 7 is recycled is characterized in that also comprise the additive formulations system, it is connected with said concentrated mixing system.
9. the system that iron containing sludge as claimed in claim 7 is recycled is characterized in that, also comprises other metallurgical grey feed proportioning systems, promptly passes through the dedusting ash feed proportioning system of watering and lowering dust, and it is connected with said concentrated mixing system.
10. the system that iron containing sludge as claimed in claim 6 is recycled is characterized in that said disk granulating system comprises granulating disc.
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| CN2012103064951A CN102816925A (en) | 2012-08-24 | 2012-08-24 | Method and system for recycling iron-containing sludge |
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| CN2012103064951A CN102816925A (en) | 2012-08-24 | 2012-08-24 | Method and system for recycling iron-containing sludge |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104046772A (en) * | 2013-03-15 | 2014-09-17 | 上海梅山钢铁股份有限公司 | Method for making cooled agglomerated pellets by use of converter gas dry-method electrostatic precipitator |
| CN104278145A (en) * | 2014-10-15 | 2015-01-14 | 首钢总公司 | Method for producing sintering ore |
| CN105177196A (en) * | 2015-10-08 | 2015-12-23 | 宝钢发展有限公司 | Iron-containing dust slime treatment process with heating conducted through coal gas and multi-frequency electricity in mixed mode |
| CN110317951A (en) * | 2019-07-16 | 2019-10-11 | 嘉善助远再生资源回收有限公司 | A method of nichrome is produced using dedusting ash of stainless steel and pickling sludge |
| CN110894576A (en) * | 2018-09-13 | 2020-03-20 | 中冶宝钢技术服务有限公司 | Metallurgical auxiliary material and preparation method thereof |
| CN114262619A (en) * | 2022-01-06 | 2022-04-01 | 大连理工大学 | Device and method for preparing high-content straight-chain alkane product by low-consumption pyrolysis of modified dust and mud compatible oily sludge |
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| CN1458289A (en) * | 2002-05-15 | 2003-11-26 | 张美焦 | Method for realizing zero exhaust for fully steelmaking of steel dust and mud |
| CN1537959A (en) * | 2003-10-23 | 2004-10-20 | 张玉山 | Cold aggregated pellet ore for ironmaking in blast furnace and its preparation method |
| CN101624637A (en) * | 2009-08-13 | 2010-01-13 | 首钢总公司 | System and method for centralized classification treatment of steel metallurgic dust mud |
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2012
- 2012-08-24 CN CN2012103064951A patent/CN102816925A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1458289A (en) * | 2002-05-15 | 2003-11-26 | 张美焦 | Method for realizing zero exhaust for fully steelmaking of steel dust and mud |
| CN1537959A (en) * | 2003-10-23 | 2004-10-20 | 张玉山 | Cold aggregated pellet ore for ironmaking in blast furnace and its preparation method |
| CN101624637A (en) * | 2009-08-13 | 2010-01-13 | 首钢总公司 | System and method for centralized classification treatment of steel metallurgic dust mud |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104046772A (en) * | 2013-03-15 | 2014-09-17 | 上海梅山钢铁股份有限公司 | Method for making cooled agglomerated pellets by use of converter gas dry-method electrostatic precipitator |
| CN104278145A (en) * | 2014-10-15 | 2015-01-14 | 首钢总公司 | Method for producing sintering ore |
| CN105177196A (en) * | 2015-10-08 | 2015-12-23 | 宝钢发展有限公司 | Iron-containing dust slime treatment process with heating conducted through coal gas and multi-frequency electricity in mixed mode |
| CN110894576A (en) * | 2018-09-13 | 2020-03-20 | 中冶宝钢技术服务有限公司 | Metallurgical auxiliary material and preparation method thereof |
| CN110317951A (en) * | 2019-07-16 | 2019-10-11 | 嘉善助远再生资源回收有限公司 | A method of nichrome is produced using dedusting ash of stainless steel and pickling sludge |
| CN114262619A (en) * | 2022-01-06 | 2022-04-01 | 大连理工大学 | Device and method for preparing high-content straight-chain alkane product by low-consumption pyrolysis of modified dust and mud compatible oily sludge |
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