CN102836778A - Wet type treatment process for stainless steel slag - Google Patents
Wet type treatment process for stainless steel slag Download PDFInfo
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- CN102836778A CN102836778A CN2011101705877A CN201110170587A CN102836778A CN 102836778 A CN102836778 A CN 102836778A CN 2011101705877 A CN2011101705877 A CN 2011101705877A CN 201110170587 A CN201110170587 A CN 201110170587A CN 102836778 A CN102836778 A CN 102836778A
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- slag
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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
- Y02P10/20—Recycling
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Abstract
The invention relates to a wet type treatment process for stainless steel slag, which belongs to the field of peripheral recycling of stainless steel and achieves the purposes of resource recycling of turning harm into a benefit and waste into wealth on the basis of taking full advantage of a slag resource. The wet type treatment process for the stainless steel slag adopts advanced and reliable slag and steel separation equipment, recovers metal and steel slag resources in the stainless steel slag to the greatest extent, takes full advantage of the slag, and turns the harm into the benefit and the waste into the wealth. With the adoption of a centralized treatment mode for stainless steel slag, the subsequent trouble in steel manufacturing is overcome fundamentally, and the social problem of environmental pollution arising from the steel slag discharge due to nonstandard treatment modes of the steel slag, such as selling, is solved. The treatment process for the stainless steel slag comprises the steps that the stainless steel converter slag and electric furnace/refining slag are crushed, sieved, recrushed, reselected and magnetically separated, and subjected to sewage concentration, slag slurry dehydration and detoxification of circulation process water. In consideration of the particularity of the converter slag and for the convenience of comprehensive utilization of tailings, the treatment process is divided into a converter slag production treatment line and an electric furnace /refining slag production treatment line.
Description
Technical field
The present invention relates to a kind of stainless steel slag wet processed technology, belong to stainless steel periphery recycling field, this technology reaches the purpose of the resource regeneration that turns bane into boon, turns waste into wealth on the basis that makes full use of the slag resource.
Background technology
Stainless steel slag is the derivative of process for making, present domestic still do not have ripe, reliable treatment technology.Adopt advanced, reliable slag, steel separating treatment technology, noble metal and stainless steel steel scraps such as the chromium that contains in the sorting recovery slag effectively, nickel can also reduce steel-making cost significantly.The tailings resource can realize resource recycling simultaneously, has solved stainless steel slag and has contained Cr
6+The exceed standard difficult problem of exhaust emission environment of ion.
The stainless steel slag treatment process must take into full account environmental requirement, takes necessary depositing dust, dedusting, noise reduction, sewage treatment facility, and strict control emission of harmful substances farthest reduces the pollution of stainless steel slag treatment process to operation and surrounding enviroment.
Summary of the invention
The stainless steel slag wet processed process using that the present invention relates to advanced, slag, steel separation equipment reliably, reclaim metal, slag steel resource in the stainless steel slag to greatest extent, make full use of slag, turn bane into boon, turn waste into wealth.The stainless steel slag focuses on pattern, has fundamentally solved the trouble and worry of STEELMAKING PRODUCTION, has solved the social concern that disposal options lack of standardization such as slag take-away in the past cause the exhaust emission environment to cause.
Stainless steel slag kind comprises the big bag casting residue of vessel slag, electroslag and the continuous casting after the cooling processing.
Slag amount on average accounts for output of steel about 25%, and wherein vessel slag and electroslag respectively account for about 50%.Before cooling, Cr
2O
3Content reaches as high as 2.4%, portion C r
6+Content＞0.5mg/L, surpass discharge standard (＜0.2mg/L), arbitrarily be stacked with the possibility of contaminated environment.After the cooling, WCr wherein
6+Content＜0.20mg/L, WCaO have higher hydraulically active up to 51.48%, as heavy metal leaching amount is suppressed, can be used as construction material, roadbed material and soil conditioner etc., and the realization resource is utilized again.
The physical aspect of stainless steel slag before the spray cooling processing is huge bulk, and the stainless steel slag is after " air cooling+spray " cooling processing, and physical aspect is comminution.
Stainless steel slag treatment technology:
Stainless steel vessel slag and electric furnace/refining slag through " air cooling+spray " handle the back by truck transport to handling, raw slag elder generation is classify and pile up, reduction moisture in the raw material workshop, then drops into main line respectively and carry out processed.Each metalloid after treatment, slag steel and mine tailing all return steel mill and use, and all kinds of tailings and filter cake leave the tailings stockyard in temporarily, are transported by truck then.
The production technology that stainless steel slag is handled mainly contains: the detoxification that the fragmentation of stainless steel vessel slag and electric furnace/refining slag, screening, fragmentation again, gravity treatment, magnetic separation, sewage concentrate, slag is starched dehydration, the recycled process water etc.Consider the particularity of vessel slag, and for ease of the comprehensive utilization of tailings, two production lines of treatment process sub converter slag and electric furnace/refining slag.
1, vessel slag is handled Wiring technology
Vessel slag is transported into vessel slag raw material workshop by material storage yard, utilizes crane gear such as forklift to plough under feed bin, through batcher and belt feeder, behind the jaw crushing crusher machine, delivers to the drum sieve screening.Fine powder slag under the compass screen surface adds water adjustment humidity through batch mixer again after magnetic separator is selected magnetic metal, deliver to rickyard behind the mixing as roadbed, cement raw material export trade; The thick slag of converter on the compass screen surface is returned to raw material place (returning hopper) with belt feeder, mixes back input electric furnace/refining slag with electric furnace/refining slag and handles line and handle.
2, electric furnace/refining slag is handled Wiring technology
The thick slag of electroslag, refining slag and converter ploughs under former feed bin with crane gears such as forklifts, sieves in advance through diagrid, on the sieve＞the bulk slag of 250mm carries out the fragmentation back with the vibration pneumatic pick of crawler hypraulic excavator and gets into the raw material storehouse; Sieve down＜slag of 250mm through belt feeder send into jaw crusher carry out just broken after, get into vibratory sieve and sieve.＞40mm oversize is sent into through batcher and is got into vibratory sieve after the dry type rod mill slightly breaks; On the sieve＞block of 25mm is the category-A metal (placing category-A metal hopper) that this processing line sub-elects from stainless steel slag;＜25mm minus mesh and dry type rod mill prime vibratory sieve＜the 40mm minus mesh gets into the wet type rod mill jointly and carries out fine grinding; Slag after the wet method fine grinding; Carry out the vibratory sieve sorting once more, the oversize of＞7mm is the category-B metal (placing category-B metal hopper) that this processing line sub-elects from stainless steel slag; After screw classifying, jigging machine gravity treatment were carried out in the minus mesh of＜7mm, the high-grade metal slag steel of selecting was the C metalloid (placing C metalloid hopper) that this processing line sub-elects from stainless steel slag; Slag after screw classifying, hydraulic cyclone, gravity treatment by the further magnetic separation of wet magnetic separator, is selected the low-grade E mine tailing (placing the mine tailing case) that this processing line sub-elects that is from stainless steel slag; Its recrement slurry is all sent into the deuterostrophies grader and is carried out being the E tailings (placing the tailings case) that this processing line sub-elects after the slag slurry separates from stainless steel slag.
3, environmental protection
Because recovery of stainless steel tailings is the industrial residue that contains chromium oxide, enterprise not only can have a strong impact on the image of enterprise to the solid useless of discharging if there are not effective treatment measures, increases the blowdown cost of enterprise, even influences Business survival.Stainless steel slag after-treatment project takes into full account environmental requirement, takes necessary dedusting, noise reduction sound, water circular treatment facility, strict control emission of harmful substances, and big degree ground reduces in the stainless steel slag processing procedure pollution to environment.
3.1 dust removal by ventilation
Stainless steel slag process for producing line is respectively transported equipment such as belt and disintegrating machine and is given out a large amount of dusty gases in process of production; Must be in addition organized high efficiency capture and purification of dusty gas, the environmental protection that makes stainless steel slag after-treatment zone and safety and sanitation can both reach country and place to the environmental protection of metallurgy industry and the strict demand of sanitary standard.The collected dust of deduster is stored in the ash bucket of deduster, sends belt feeder back to by the defeated grey equipment (process equipment) of special use, avoids secondary pollution.
3.2 Waste Water Treatment
The overflow of each grader water in the stainless steel slag processing procedure; All contain fine grain tailings and little metal end; After concentrating entering magnetic separation, spiral classifier to select metal dust, the slag pulp mixture that contains big water gaging concentrates the remittance concentration basin to concentrate, according to the Cr in the slag slurry
6+Content, basicity, concentration add chemical agent, carry out water treatments such as detoxification, flocculation.The supernatant of concentration basin is sent the slag wet treatment system back to and is recycled through post precipitation.Starch by being pumped into dewaterer through deposition and the slag that concentrates, carry out vacuum filtering and dewatering to the ore deposit.Slag slurry after the dehydration is processed mud cake, and the filtrating that produces in the vacuum filtration process is returned concentration basin and continued to recycle.Slag is handled the waste water that line produces, and after the thickening of water treatment line, gets rid of solid matter wherein, and the backwater equipment of sending back to recycles.Water treatment Design Treatment ability reaches 350m
3/ h.At first waste water is delivered to distributing trough, for increasing the wastewater sedimentation effect, in distributing trough, adds the PAM flocculation aid, and waste water gets into 2 efficient concentration basins through tank then, in its stabilizing feed well, is provided with mixer, further mixes in order to waste water and flocculation aid.Waste water stops appropriate time after getting into concentration basin, and its supernatant overflow is delivered to each process water point to circulation (clearly) pond through water circulating pump.Solid particulate matter in the waste water sinks down into enrichment region, and the slag slurry after concentrating filters out filter cake through vacuum filter, and the isolated filtrating of vacuum filter is returned concentration basin, and isolated gas gets into atmosphere.
The specific embodiment
Embodiment 1 electroslag wet processed
1, with crane gears such as forklifts electroslag is ploughed under former feed bin.
2, sieve in advance through diagrid, on the sieve＞the bulk slag of 250mm carries out the fragmentation back with the vibration pneumatic pick of crawler hypraulic excavator and gets into the raw material storehouse; Sieve down＜slag of 250mm through belt feeder send into jaw crusher carry out just broken after, get into vibratory sieve and sieve.
3, sieve back＞40mm oversize and send into the slightly broken back entering of dry type rod mill vibratory sieve through batcher, on the sieve＞block of 25mm is the category-A metal that this processing line sub-elects from stainless steel slag.
4, sieve down＜25mm material and dry type rod mill prime vibratory sieve＜the 40mm minus mesh gets into the wet type rod mill jointly and carries out fine grinding; Slag after the wet method fine grinding; Carry out the vibratory sieve sorting once more, the oversize of＞7mm is the category-B metal that this processing line sub-elects from stainless steel slag.
5, sieve down＜after the material of 7mm carried out screw classifying, jigging machine gravity treatment, the high-grade metal slag steel of selecting was the C metalloid that this processing line sub-elects from stainless steel slag.
6, the slag after screw classifying, hydraulic cyclone, gravity treatment by the further magnetic separation of wet magnetic separator, is selected the low-grade E mine tailing that this processing line sub-elects that is from stainless steel slag.
7, its recrement slurry is all sent into the deuterostrophies grader and is carried out being the tailings that this processing line sub-elects after the slag slurry separates from stainless steel slag.
Embodiment 2 vessel slag wet processed
1, vessel slag is transported into vessel slag raw material workshop by material storage yard, utilizes crane gears such as forklift to plough under feed bin.
2,, behind the jaw crushing crusher machine, deliver to the drum sieve screening through batcher and belt feeder.
3, the fine powder slag under the compass screen surface adds water adjustment humidity through batch mixer again after magnetic separator is selected magnetic metal, delivers to rickyard behind the mixing as roadbed, cement raw material export trade.
4, the thick slag of the converter on the compass screen surface is returned to the raw material place with belt feeder, mixes back input electric furnace/refining slag with electric furnace/refining slag and handles line and handle.
Claims (1)
1. invention relates to a kind of stainless steel slag wet processed technology, belongs to stainless steel periphery recycling field, and this technology reaches the purpose of the resource regeneration that turns bane into boon, turns waste into wealth on the basis that makes full use of the slag resource, it is characterized in that:
(1) adopts noble metal and stainless steel steel scraps such as advanced, reliable slag, steel separating treatment technology, the chromium that contains in the sorting recovery slag effectively, nickel, can also reduce steel-making cost significantly.The tailings resource can realize resource recycling simultaneously, has solved stainless steel slag and has contained Cr
6+The exceed standard difficult problem of exhaust emission environment of ion.
(2) production technology of stainless steel slag processing mainly contains: the detoxification that the fragmentation of stainless steel vessel slag and electric furnace/refining slag, screening, fragmentation again, gravity treatment, magnetic separation, sewage concentrate, slag is starched dehydration, the recycled process water etc.Consider the particularity of vessel slag, and for ease of the comprehensive utilization of tailings.
(3) after treatment product mainly is metal, slag steel and nonmetal tailings.Metal, the slag steel that reclaims can all return steel-making and use, and nonmetal tailings is as export trades such as cement raw material or roadbed inserts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101705877A CN102836778A (en) | 2011-06-23 | 2011-06-23 | Wet type treatment process for stainless steel slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101705877A CN102836778A (en) | 2011-06-23 | 2011-06-23 | Wet type treatment process for stainless steel slag |
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| CN102836778A true CN102836778A (en) | 2012-12-26 |
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ID=47364657
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|---|---|---|---|
| CN2011101705877A Pending CN102836778A (en) | 2011-06-23 | 2011-06-23 | Wet type treatment process for stainless steel slag |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103894282A (en) * | 2014-03-18 | 2014-07-02 | 王开玺 | Technological method for sorting dedusting ash of blast furnace |
| CN105039612A (en) * | 2015-06-29 | 2015-11-11 | 上海宝钢节能环保技术有限公司 | Method for recycling metallic iron from stainless steel slag |
| CN105536966A (en) * | 2016-01-29 | 2016-05-04 | 安徽省凤形耐磨材料股份有限公司 | Electric furnace slag metal deep recovery technology for casting |
| CN106222434A (en) * | 2016-09-29 | 2016-12-14 | 中冶华天工程技术有限公司 | The Simple treatment method of a kind of AOD furnace slag and device |
| CN106733068A (en) * | 2016-10-19 | 2017-05-31 | 中信重工机械股份有限公司 | The recovery method of nickel chromium triangle metal in a kind of metallurgical tailings |
| CN110180640A (en) * | 2019-06-10 | 2019-08-30 | 成渝钒钛科技有限公司 | A kind of storehouse abrasion process method in mitigation rod mill load and rod mill |
| CN112007752A (en) * | 2020-08-17 | 2020-12-01 | 广西冶固科技发展有限公司 | Stainless steel refining furnace tailing gradient recycling sorting method and system |
-
2011
- 2011-06-23 CN CN2011101705877A patent/CN102836778A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103894282A (en) * | 2014-03-18 | 2014-07-02 | 王开玺 | Technological method for sorting dedusting ash of blast furnace |
| CN105039612A (en) * | 2015-06-29 | 2015-11-11 | 上海宝钢节能环保技术有限公司 | Method for recycling metallic iron from stainless steel slag |
| CN105039612B (en) * | 2015-06-29 | 2017-09-15 | 上海宝钢节能环保技术有限公司 | A kind of method that metallic iron is reclaimed from stainless steel slag |
| CN105536966A (en) * | 2016-01-29 | 2016-05-04 | 安徽省凤形耐磨材料股份有限公司 | Electric furnace slag metal deep recovery technology for casting |
| CN106222434A (en) * | 2016-09-29 | 2016-12-14 | 中冶华天工程技术有限公司 | The Simple treatment method of a kind of AOD furnace slag and device |
| CN106222434B (en) * | 2016-09-29 | 2018-08-14 | 中冶华天工程技术有限公司 | A kind of Simple treatment method and device of AOD furnace slag |
| CN106733068A (en) * | 2016-10-19 | 2017-05-31 | 中信重工机械股份有限公司 | The recovery method of nickel chromium triangle metal in a kind of metallurgical tailings |
| CN106733068B (en) * | 2016-10-19 | 2018-12-25 | 中信重工机械股份有限公司 | It is a kind of metallurgy tailings in nickel chromium triangle metal recovery method |
| CN110180640A (en) * | 2019-06-10 | 2019-08-30 | 成渝钒钛科技有限公司 | A kind of storehouse abrasion process method in mitigation rod mill load and rod mill |
| CN112007752A (en) * | 2020-08-17 | 2020-12-01 | 广西冶固科技发展有限公司 | Stainless steel refining furnace tailing gradient recycling sorting method and system |
| CN112007752B (en) * | 2020-08-17 | 2023-11-28 | 广西冶固科技发展有限公司 | Method and system for echelon recycling separation of stainless steel refining furnace tailings |
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Application publication date: 20121226 |