CN108796209A - A kind of processing of grinding roller sludge and utilize method - Google Patents
A kind of processing of grinding roller sludge and utilize method Download PDFInfo
- Publication number
- CN108796209A CN108796209A CN201710283370.4A CN201710283370A CN108796209A CN 108796209 A CN108796209 A CN 108796209A CN 201710283370 A CN201710283370 A CN 201710283370A CN 108796209 A CN108796209 A CN 108796209A
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- China
- Prior art keywords
- sludge
- grinding roller
- electric furnace
- oiling
- treatment
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/005—Preliminary treatment of scrap
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
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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
Abstract
A kind of grinding roller Treatment of Sludge and utilize method, grinding roller sludge is put into kiln gas gasifier and carries out low temperature gasification deoiling treatment, moisture and oily substance inside sludge are become combustible gas by thermal evaporation, cracking, and sludge completes de-oiling and desiccation in external flue gas, oil content cracking exothermic effects；Sludge is fitted into jumbo bag after de-oiling desiccation, and the ratio of electric furnace smelting molten steel quality 0.5-2% is accounted in sludge, is directly hung above steel scrap and solid-state material in electric furnace material basket in electric furnace loading stage, is subsequently smelted by electric furnace smelting program.Grinding roller Treatment of Sludge of the present invention and be simple and convenient to operate using method and process, be at low cost, valuable resource is fully used.
Description
Technical field
The present invention relates to the processing of refuse processing method more particularly to a kind of grinding roller sludge and utilize method.
Background technology
Grinding roller sludge mostly come from the repairing of the processes roll such as iron and steel enterprise's hot rolling, cold rolling Da Mo when to generate emulsion useless
Liquid, the sludge generated with the filtering of paper bag filter.When this sludge main component is roll and grinder buffing, from roll and grinding wheel
The component polished, while making lubrication and cooling effect using emulsion when polishing, thus this grinding roller sludge metallic iron, chromium and
Nickel content is higher, and this three kinds of valuable metals exist with metallic state, and contains a certain amount of oil, general moisture content 15~40%,
Oil content is 2~15%, butt total iron content about 60%, chromium content 0.5~5%, nickel content 0.5~4%.
The main processing method of disposal of grinding roller sludge has：
1) it fills, final disposal but the shortcomings that there are land occupation and the valuable metal wastings of resources；
2) it burns:The shortcomings that oily (organic matter) removal effect is good, but that there are energy consumptions is higher, and discharge flue gas need to be handled；
3) low temperature distillation, can be with oil recovery and valuable metal resource, but oil purification is more complex and cost is higher, contains suitable for height
The processing of greasy dirt；
4) cement kiln collaboration is handled：Cement kiln collaboration is using being a preferable method, but across factory transport and presence need to be done
Change pretreated disadvantage, while the processing of cement kiln flue gas can also be added and be born, and the wave of chromium, nickel valuable metal can be caused
Take；
5) Commercial cultivation is returned inside iron and steel enterprise, electric furnace or converter are returned after direct briquetting, but desiccation is needed to pre-process, and is added
Converter or furnace operation improper the problem of bringing VOC emission to flue gas；Sintering is returned, oil can be volatized into main cigarette in sintering process
Road flue gas adversely affects the safety of electric precipitator.
Invention content
The purpose of the present invention is to provide a kind of grinding roller Treatment of Sludge and utilize method, simple for process, easy to operate, cost
Low, valuable resource is fully used.
In order to achieve the above objectives, the technical scheme is that,
A kind of grinding roller Treatment of Sludge and method is utilized, grinding roller sludge, which is put into kiln gas gasifier, carries out low temperature gasification de-oiling
It handles, the moisture and oily substance inside sludge are become combustible gas by thermal evaporation, cracking, and sludge is cracked in external flue gas, oil content
Exothermic effects complete de-oiling and desiccation；Sludge is accounted for the ratio of electric furnace smelting molten steel quality 0.5~2% in sludge and added after de-oiling desiccation
Enter in electric furnace, is subsequently smelted by electric furnace smelting program.
Preferably, grinding roller sludge is 300~500 DEG C in gasification in-furnace temperature control, air excess when de-oiling in gasification furnace
Coefficient 0.2~0.8, the reaction time control in gasification furnace of grinding roller sludge is 10~30min.
Preferably, the grinding roller sludge is less than 15% into oil content when kiln gas gasifier, and grinding roller moisture percentage in sewage sludge is small
In 20%.
Preferably, sludge is put into 0.5 ton or 1 ton of jumbo bag for use after de-oiling desiccation.
Grinding roller sludge is put into kiln gas gasifier and carries out low temperature gasification deoiling treatment by the present invention, moisture inside sludge and
Oily substance is become combustible gas by thermal evaporation, cracking, and sludge is completed de-oiling and done the effects that external flue gas, oil content crack heat release
Change, is then added in electric furnace and smelts.
Electric furnace is added in the ratio that electric furnace smelting molten steel quality 0.5-2% is accounted in sludge, on the one hand recycles the moneys such as iron, chromium and nickel
Source smelts fusion convenient for the energization of sludge and steel scrap, on the other hand will not cause obstacle to the regulation and control of molten steel alloying component.
Grinding roller sludge is 300~500 DEG C in gasification in-furnace temperature control；More than certain temperature just can guarantee oil volatilization,
Gasification reaction in cracking and gasification furnace, oil can remove thoroughly after temperature reaches certain value, and temperature is high again to increase system operation
Energy consumption.
Coefficient of excess air 0.2~0.8 when de-oiling in gasification furnace is passed through a certain amount of air and can guarantee the anoxic in reacting
A certain amount of CO and CH4 gas in cracking and gasification reaction and combustible gas, also can guarantee and not will produce excessive tar；Air mistake
Surplus coefficient is excessively high, the generation of heating power shape pollutant such as metallic iron can be caused to be aoxidized too much, while will also result in NO be significantly increased.
Sludge reaction time control in gasification furnace is 10~30min, the evaporating of gasification furnace moisture, oil volatilization and split
The gasification reaction of gas, organic matter needs certain time, just can guarantee that de-oiling effect, reaction certain time de-oiling can thoroughly, then increase
It is meaningless to de-oiling between added-time.
The grinding roller sludge oil content is less than 15%, and one side oil content is excessively high, can increase the burden of fume treatment, contain
Oil is excessively high to may be used more suitably method oil recovery.The grinding roller moisture percentage in sewage sludge is less than 20%, under this moisture content
Grinding roller sludge gasification de-oiling system will not be caused to impact, the excessively high grinding roller sludge of moisture content is into will adopt before kiln gas gasifier
Take dehydration pre-process.
Compared with prior art, the present invention having the advantages that：
1, it realizes the recycling of valuable metal iron, chromium and nickel in grinding roller sludge, and electric furnace smelting and flue gas will not be arranged
Put generation impact.
2, electric furnace utilization is returned in gasification de-oiling, easy to operate, processing cost is low.
3, gasification de-oiling will not make that pollutant emission is exceeded, and the combustible gas generated using gasification as dirty gasification outside
Predrainage when hot type heat source or excessively high moisture percentage in sewage sludge, process energy consumption are low.
Specific implementation mode
With reference to embodiment, the present invention will be further described.
Embodiment 1
The grinding roller sludge that one hot rolling grinding roller workshop generates, oil content 7.5%, moisture content 24.6%, total iron content
58.5% (butt), chromium content 2.0% (butt), nickel 2.5% (butt).Rotary kiln is sent by screw feeder after this sludge
In the kiln hood of gasification furnace, controlling technological parameter in kiln gas gasifier is：400 DEG C of temperature, coefficient of excess air 0.5, reaction
Time is 20min；The grinding roller sludge residue main chemical compositions of discharge are calculated as with oxide：Te 62.9%, Si 1.1%, Cr
2.3, Ni2.6%, TC 1.1%, oil content and moisture content are zero.
This grinding roller sludge residue is contained in jumbo bag, every bag of 1 ton ± 0.1 ton of charge weight；In 100 tons of electric furnaces of nominal capacity
It is used when smelting stainless steel steel grade (trade mark SUS304, finished product Ni content 8%), application method：
1) jumbo bag for holding the material is stacked at the scene (drying), can be used at any time；First by steel scrap；
2) and other solid-state material are in pan feeding basket；
3) after having matched whole steel scraps and solid material, then by storage there is the jumbo bag (1-2 bags) of the material to hang in material basket
Above steel scrap and solid-state material；
4) electric furnace smelting SUS304 stainless steel routine operations are subsequently pressed, that is, expect basket charging --- the fusing that is powered (steel scrap and solid
Body material) --- hot metal charging (dephosphorization molten iron) --- continue fusing, heating --- reduction (thermometric, sampling) --- tap and etc. into
Row.
Embodiment 2
The grinding roller sludge that one slab grinding roller workshop generates, oil content 5.5%, moisture content 21.6%, total iron content
56.5% (butt), chromium content 1.1% (butt), nickel 3.3% (butt).Rotary kiln is sent by screw feeder after this sludge
In the kiln hood of gasification furnace, controlling technological parameter in kiln gas gasifier is：350 DEG C of temperature, coefficient of excess air 0.35, reaction
Time is 15min；The grinding roller sludge residue main chemical compositions of discharge are calculated as with oxide：Te 59.7%, Si2.7%, Cr
1.2%, Ni 3.5%, TC 3.4%, oil content and moisture content are zero.
This grinding roller sludge residue is contained in jumbo bag, every bag of 0.5 ton ± 0.05 ton of charge weight；In 100 tons of nominal capacity
(trade mark BN4, finished product Ni contents use electric furnace smelting type of stainless steel when 4.0%), application method：
1) jumbo bag for holding the material is stacked at the scene (drying), can be used at any time；
2) first by steel scrap and other solid-state material in pan feeding basket；
3) after having matched whole steel scraps and solid material, then by storage there is the jumbo bag (2-4 bags) of the material to hang in material basket
Above steel scrap and solid-state material,
4) electric furnace smelting BN4 stainless steel routine operations are subsequently pressed, that is, expect basket charging --- be powered fusing (steel scrap and solid
Material) --- hot metal charging (dephosphorization molten iron) --- continue fusing, heating --- reduction (thermometric, sampling) --- tap and etc. into
Row.
Embodiment 3
The grinding roller sludge that one cold rolling grinding roller workshop generates, oil content 11.3%, moisture content 22.7%, total iron content
61.6% (butt), chromium content 3.8% (butt), nickel 0.15% (butt).It is sent into and is turned round by screw feeder after this sludge
In the kiln hood of kiln gasification furnace, controlling technological parameter in kiln gas gasifier is：It is 450 DEG C of temperature, coefficient of excess air 0.6, anti-
It is 25min between seasonable；The grinding roller sludge residue main chemical compositions of discharge are calculated as with oxide：TFe 65.0%, Si 0.3%,
Cr 4.1%, Ni 0.2%, TC 1.3%, oil content and moisture content are zero.
This grinding roller sludge residue is contained in jumbo bag, every bag of 1.0 tons ± 0.1 ton of charge weight；In 100 tons of electricity of nominal capacity
(trade mark BN1, finished product Ni contents use stove smelting stainless steel steel grade when 1.0%), application method：
1) jumbo bag for holding the material is stacked at the scene (drying), can be used at any time；
2) first by steel scrap and other solid-state material in pan feeding basket；
3) after having matched whole steel scraps and solid material, then by storage there is the jumbo bag (1-3 bags) of the material to hang in material basket
Above steel scrap and solid-state material；
4) electric furnace smelting BN1 stainless steel routine operations are subsequently pressed, that is, expect basket charging --- be powered fusing (steel scrap and solid
Material) --- hot metal charging (dephosphorization molten iron) --- continue fusing, heating --- reduction (thermometric, sampling) --- tap and etc. into
Row.
Claims (4)
1. a kind of grinding roller Treatment of Sludge and utilize method, characterized in that by grinding roller sludge be put into kiln gas gasifier carry out low temperature
Gasify deoiling treatment, and the moisture and oily substance inside sludge are become combustible gas by thermal evaporation, cracking, sludge external flue gas,
Oil content cracks exothermic effects and completes de-oiling and desiccation；Sludge is fitted into jumbo bag after de-oiling desiccation, and electric furnace smelting molten iron is accounted for by sludge
The ratio of quality 0.5-2% directly hangs above steel scrap and solid-state material in electric furnace material basket in electric furnace loading stage, subsequently presses
Electric furnace smelting program is smelted.
2. grinding roller Treatment of Sludge as described in claim 1 and utilize method, characterized in that grinding roller sludge gasification in-furnace temperature
Control is 300~500 DEG C, coefficient of excess air 0.2~0.8 in gasification furnace, and grinding roller sludge reaction time in gasification furnace controls
For 10~30min.
3. grinding roller Treatment of Sludge as described in claim 1 and utilizing method, characterized in that the grinding roller sludge is into rotary kiln
Oil content is less than 15% when gasification furnace, and moisture content is less than 20%.
4. grinding roller Treatment of Sludge as described in claim 1 and utilize method, characterized in that sludge is put into 0.5 after de-oiling desiccation
It is for use in ton or 1 ton of jumbo bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710283370.4A CN108796209B (en) | 2017-04-26 | 2017-04-26 | Method for treating and utilizing sludge of grinding roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710283370.4A CN108796209B (en) | 2017-04-26 | 2017-04-26 | Method for treating and utilizing sludge of grinding roller |
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| Publication Number | Publication Date |
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| CN108796209A true CN108796209A (en) | 2018-11-13 |
| CN108796209B CN108796209B (en) | 2020-09-25 |
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| CN201710283370.4A Active CN108796209B (en) | 2017-04-26 | 2017-04-26 | Method for treating and utilizing sludge of grinding roller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111944548A (en) * | 2020-08-13 | 2020-11-17 | 中南大学 | Method for synergistically utilizing organic solid wastes by steel sintering process |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1566751A (en) * | 2003-06-27 | 2005-01-19 | 清华大学 | Multistage burning method and system for gasification of refuse and co-fusion of charcoal ash in rotary kiln |
| CN101811792A (en) * | 2009-02-24 | 2010-08-25 | 宝山钢铁股份有限公司 | Processing method of stainless steel cold rolling pickling wastewater |
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| CN103663896A (en) * | 2013-11-12 | 2014-03-26 | 同济大学 | Method and device for stabilizing heavy metal through pyrolysis of sludge |
| CN105271628A (en) * | 2015-10-22 | 2016-01-27 | 得利满水处理系统(北京)有限公司 | Low-temperature drying system and method of sludge |
| CN105524631A (en) * | 2016-01-19 | 2016-04-27 | 青岛理工大学 | Method for preparing energy source gas from sludge and simultaneously performing harmless treatment on chromium slag |
| CN106222364A (en) * | 2016-09-29 | 2016-12-14 | 中冶华天南京工程技术有限公司 | Pickling sludge drying pelletizing returns process and the system of AOD furnace |
| CN106277705A (en) * | 2016-09-29 | 2017-01-04 | 中冶华天南京工程技术有限公司 | Process and the system of smelting furnace is returned in the direct mummification of pickling mud |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111944548A (en) * | 2020-08-13 | 2020-11-17 | 中南大学 | Method for synergistically utilizing organic solid wastes by steel sintering process |
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| CN108796209B (en) | 2020-09-25 |
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