CN101962717A - Raw material treatment and pelletizing system process for rotary hearth furnace - Google Patents
Raw material treatment and pelletizing system process for rotary hearth furnace Download PDFInfo
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- CN101962717A CN101962717A CN2010105218936A CN201010521893A CN101962717A CN 101962717 A CN101962717 A CN 101962717A CN 2010105218936 A CN2010105218936 A CN 2010105218936A CN 201010521893 A CN201010521893 A CN 201010521893A CN 101962717 A CN101962717 A CN 101962717A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a raw material treatment and pelletizing system process for a rotary hearth furnace (RHF). The process comprises the following steps of: conveying various high-zinc iron-containing dusts to be treated to a mixing tank for mixing; and moistening, grinding and pelletizing the dusts and adhesive mixture required by pelletizing to produce the high-zinc iron-containing pellets which meet the high index parameter requirements of the RHF. The process effectively overcomes the adverse factors, such as large fluctuation, poor pelletizing performance and the like, of the raw material components, such as zinc-containing dust, sludge and the like, by combining the actual conditions of the high-zinc iron-containing sludge and dust raw materials of each iron and steel plant, and has the advantages of perfect function, accurate ingredients, compact layout and reasonable manufacturing cost; and the high-zinc iron-containing pellets which meet the high index parameter requirements of the RHF can be stably produced.
Description
Technical field
The present invention relates to the cycle of treatment recycling of steel industry high zinc containing iron mud, dust, particularly a kind of zinc-containing dust with the required processing of Steel Plant, mud are produced the technology of the high zinc containing iron pelletizing that meets the rotary hearth furnace parameter request.
Background technology
The used zinc overwhelming majority that contains the zinc raw material enters in iron dust containing and the mud in the steel manufacture process, and along with zinc-plated steel scrap consumption constantly increases, the useless admittedly zinc content of metallurgy is more and more higher.Because dust and mud iron content composition are higher, are a kind of renewable resource of preciousness.According to national resources utilization and Environment Protection Policy, also have circular economy concept, these iron dust containings and mud all should be handled the back recycle.But recycle need solve a zinc enrichment difficult problem, because will cause the not genial life-span of conditions of blast furnace to be reduced after the continuous enrichment of zinc.But domestic Steel Plant also do not have a cover all to carry out the holonomic system of system design and the production of input on-line industry from links such as raw material processing, reduction and waste gas, zinc powder recovery.Correlative study also rests on theory or experimental phase mostly, especially handle and make the ball system at the raw material of key and do not have that complete reliable technology of cover and equipment can overcome mud, this class raw material type of dust is numerous and diverse, the composition fluctuation is big, make unfavorable factors such as ball poor performance, and can stably produce the high zinc containing iron pelletizing that physical and chemical index satisfies the high temperature reduction condition with reasonable cost.It is the technology and the equipment that are adapted to Iron And Steel Industry high zinc containing iron mud, dust industrial treatment of core with rotary hearth furnace (Rotary Heath Furnace (RHF)) that there is a cover in Japan, influenced by the different working conditions of each factory very big but handle and make the ball system at raw material, and this can be decision RHF be suitable for and the key link of ordinary production.Japanese side does not also have a cover raw material subject range wide at present, and from mud oven dry, material pneumatic seal conveying, dry method sealing accurate dosing, raw material ground and mixed humidification, make ball screening oven dry, defective material and do not land this occupation of land unskilled labourer of circular treatment the plant complete raw material processing and the pellet forming process of compactness, no secondary environmental pollution continuously.
Summary of the invention
Problem to be solved by this invention provides a kind of rotary hearth furnace raw material and handles and make the ball system process, it is in conjunction with the practical situation of each Steel Plant's high zinc containing iron mud, dust raw material, overcome the raw material composition and fluctuate greatly, make many unfavorable factors such as ball poor performance, and process function is perfect, batching is accurate, compact in design, cost are reasonable, can stably produce the high zinc containing iron pelletizing that satisfies RHF stove high target parameter request.
Rotary hearth furnace raw material of the present invention is handled and is made the ball system process, the steps include:
(1), batching:
A, with the pressurized air at the various high zinc containing iron dust utilizations scene in the tank car and the batch bin that pipeline is sent into sealing, high zinc containing iron dust is prepared burden by the system that is made up of feeding machine and decrement scale at the batch bin end opening;
B, will make the pressurized air at the required tackiness agent utilization scene of ball and the tackiness agent storehouse that pipeline is sent into sealing in the tank car, tackiness agent is prepared burden by the system that is made up of feeding machine and decrement scale at tackiness agent storehouse end opening;
(2), high zinc containing iron dust compound, tackiness agent compound are sent into the preliminary humidification mixing of humidifier together by conveyor drive;
(3), the compound of preliminary humidification mixing is delivered to damp mill again and is ground;
(4), the material after will being ground by conveyor drive delivers to the buffering feed bin, by the disk feeder or the pull-type scale of buffering feed bin end opening, quantitatively material sent into pelletizer make ball; The green-ball of producing is sent into the syllogic roll screen or vibratory screening apparatus sieves; The qualified green-ball that sieves out advances the green-ball drying machine drying; Ball after the oven dry is gone into the RHF stove by distributor;
(5), the defective ball that produces in screening, oven dry and the RHF charging process is quantitatively returned damp mill by conveyor drive, buffering feed bin, the dust that dust-removal system is collected adopts pneumatic chute to send batch bin back to.
The analysis of components because dust was just taken a sample every 4 hours, thus when the raw material composition fluctuates, just can adjust the feeding coal of the various dust of decrement burden balance by computer, to guarantee the stable of compound composition.Increased humidifier and damp mill simultaneously, can further carry out mixing and grind under the stable prerequisite of compound composition, it is more even that compound composition, moisture content are distributed, and the size ratio surface-area increases.Therefore this several steps close fit of this technology just can effectively overcome zinc-containing dust, this class raw material composition fluctuation of mud is big, makes unfavorable factors such as ball poor performance, stably produces the high zinc containing iron pelletizing that satisfies RHF stove high target parameter request.Whole process flow of the present invention forms closed loop, and no waste material effluxes, and does not pollute basically.Device layout compactness, environment according to this flow arrangement are clean and tidy, and 5000m2 is only taken up an area of in the investment of 100,000,000 Renminbi, and the Japanese similar system identical with the system processing power compared, and its cost has only their 1/3, so cost is reasonable.
Description of drawings
Fig. 1 is that ball system process figure is handled and made to rotary hearth furnace raw material of the present invention.
Embodiment
At first, the various high zinc containing iron dusts of the required processing of native system are prepared burden, be about to the pressurized air at the various high zinc containing iron dust utilizations scene in the tank car and the batch bin that pipeline is sent into sealing, dust is prepared burden by the system that is made up of feeding machine and decrement scale at the batch bin end opening; Simultaneously, will make the pressurized air at the required tackiness agent utilization scene of ball and the tackiness agent storehouse that pipeline is sent into sealing in the tank car, tackiness agent is prepared burden by the system that is made up of feeding machine and decrement scale at tackiness agent storehouse end opening.Again high zinc containing iron dust compound, tackiness agent compound are sent into the preliminary humidification mixing of humidifier together by conveyor drive.Then the defective ball of the compound of preliminary humidification mixing and back operation is all delivered to damp mill by conveyor drive and add wet lapping, make 95% granularity of material be-200 orders, the moisture content of material reaches 8%.Then carry out following several operation of sending: deliver to the buffering feed bin by conveyor drive with grinding the material that comes out, disk feeder or pull-type scale by buffering feed bin end opening, quantitative material is sent into diameter of phi=7m, the limit height is balling disc or the ball press of 1.1m, produces the green-ball of qualification rate 80% above diameter of phi 5～20mm; Green-ball is sent into syllogic roll screen or vibratory screening apparatus carry out the green-ball screening, qualified green-ball advances the green-ball dryer, and the qualified ball after the oven dry goes into by distributor to go into the RHF stove.Simultaneously, the defective ball that screening, oven dry and RHF charging are produced returns damp mill by conveyor drive, buffering feed bin; The iron dust containing that dust-removal system is collected adopts RHF stove dust to reclaim pneumatic chute and sends batch bin back to.
Various high zinc containing iron dusts comprise the various dust in sintering, blast furnace, the converter: as stokehold ash, converter ash, stokehold secondary ash, gravitational dust etc.If high zinc containing iron dust bleeding point and batch bin are not far, high zinc containing iron dust can be sent into batch bin with the direct strength wind of dense phase pump.Tackiness agent is a wilkinite.
For avoiding outside supplied materials amount fluctuation and each processing apparatus fault that quantity-produced is influenced, the spy increases a buffering feed bin in the revert system of damp mill and defective ball, and buffering feed bin end opening is provided with the disk feeder or the pull-type scale of may command flow.
Wherein, according to the situation of different steel mills, if use is that dry method dust does not produce lower concentration mud, so only need to handle high zinc containing iron dust, step 1 has two batchings of a, b just passable so; If what use is that wet dedusting produces converter mud or blast furnace gas mud is lower concentration mud, this technology can also add the processing to lower concentration mud: being about to carry the lower concentration converter mud and the blast furnace gas mud of coming by sludge pipe is that lower concentration mud is introduced into the Sewage treatment systems of being made up of concentration basin, stirred pot, pressure filter, make mud become the mud cake of moisture content 25-30% through dehydration, prepare burden by weigher again, remain on 3%-5% behind the moisture content according to itself and mix dust during batching and control; Send into the preliminary humidification mixing of humidifier by the scraper plate machine together with high zinc containing iron dust compound, tackiness agent compound then.
When batching, mainly consider TFe, Zn, SiO
2Deng component content, also to take into account each kind raw material simultaneously and need treatment capacity.Carry out after the charge calculation so that the scope that can change the adjustment of preparing burden according to the actual production raw material will be fully reserved in determining of system capability simultaneously.
The charge calculation table of each raw material sees the following form:
Because mud and dust all are the analysis of components of just taking a sample every 4 hours, thus when the raw material composition fluctuates, just can adjust the feeding coal of the various dust of decrement burden balance by computer, to guarantee the stable of compound composition.Increased humidifier and damp mill simultaneously, can further carry out mixing and grind under the stable prerequisite of compound composition, it is more even that compound composition, moisture content are distributed, and the size ratio surface-area increases.Therefore this several steps close fit of this technology just can effectively overcome zinc-containing dust, this class raw material composition fluctuation of mud is big, makes unfavorable factors such as ball poor performance, stably produces the high zinc containing iron pelletizing that satisfies RHF stove high target parameter request.Whole process flow of the present invention forms closed loop, and no waste material effluxes, and does not pollute basically.Device layout compactness, environment according to this flow arrangement are clean and tidy, and 5000m is only taken up an area of in the investment of 100,000,000 Renminbi
2, the Japanese similar system identical with the system processing power compared, and its cost has only their 1/3, so cost is reasonable.
Claims (10)
1. the rotary hearth furnace raw material is handled and is made the ball system process, the steps include:
(1), batching:
A, with the pressurized air at the various high zinc containing iron dust utilizations scene in the tank car and the batch bin that pipeline is sent into sealing, high zinc containing iron dust is prepared burden by the system that is made up of feeding machine and decrement scale at the batch bin end opening;
B, with the pressurized air of making the required tackiness agent utilization scene of ball in the tank car and the tackiness agent storehouse that pipeline is sent into sealing, tackiness agent is prepared burden by the system that is made up of feeding machine and decrement scale at tackiness agent storehouse end opening;
(2), high zinc containing iron dust compound, tackiness agent compound are sent into the preliminary humidification mixing of humidifier together by conveyor drive;
(3), the compound of preliminary humidification mixing is delivered to damp mill again and is added wet lapping;
(4), the material after will being ground by conveyor drive delivers to the buffering feed bin, by the disk feeder or the pull-type scale of buffering feed bin end opening, quantitatively material sent into pelletizer make ball; Green-ball is entered the syllogic roll screen or vibratory screening apparatus sieves; The qualified green-ball that sieves out advances the green-ball drying machine drying; Ball after the oven dry is gone into the RHF stove by distributor;
(5), the defective ball that produces in screening, oven dry and the RHF charging process is quantitatively returned damp mill and adds wet lapping by conveyor drive, buffering feed bin; The iron dust containing that dust-removal system is collected adopts pneumatic chute to send batch bin back to.
2. rotary hearth furnace raw material according to claim 1 is handled and is made the ball system process, and it is characterized in that: described various high zinc containing iron dusts comprise the various dust in sintering, blast furnace, the converter: as stokehold ash, converter ash, stokehold secondary ash, gravitational dust etc.
3. rotary hearth furnace raw material according to claim 1 is handled and is made the ball system process, and it is characterized in that: the various high zinc containing iron dusts among step (1)-a can be sent into batch bin with the direct strength wind of dense phase pump.
4. rotary hearth furnace raw material according to claim 1 is handled and is made the ball system process, and it is characterized in that: the tackiness agent among step (1)-b is a wilkinite.
5. the ball system process is handled and made to rotary hearth furnace raw material according to claim 1, it is characterized in that: when carrying out step (1) batching, the lower concentration converter mud that can also carry by sludge pipe and blast furnace gas mud are that lower concentration mud is introduced into Sewage treatment systems and makes mud become mud cake, prepare burden by weigher again, remain on 3%-5% behind the moisture content according to itself and mix dust during batching and control; Send into the preliminary humidification mixing of humidifier by the scraper plate machine together with high zinc containing iron dust compound, tackiness agent compound then.
6. rotary hearth furnace raw material according to claim 5 is handled and is made the ball system process, and it is characterized in that: described Sewage treatment systems comprises concentration basin, stirred pot, pressure filter.
7. rotary hearth furnace raw material according to claim 5 is handled and is made the ball system process, and it is characterized in that: the moisture content of described mud cake is 25-30%.
8. rotary hearth furnace raw material according to claim 1 is handled and made the ball system process, it is characterized in that: 95% the granularity that damp mill adds material behind the wet lapping is-200 orders, and the moisture content of material reaches 8%.
9. rotary hearth furnace raw material according to claim 1 is handled and is made the ball system process, it is characterized in that: the balling disc in the described step (4) or the diameter of phi=7m of ball press, and the limit height is 1.1m, the diameter of the green-ball of producing is Φ 5～20mm.
10. handle according to claim 1 or 4 described rotary hearth furnace raw materials and make the ball system process, it is characterized in that: mainly consider during batching to carry out charge calculation according to following charge calculation table by component contents such as TFe, Zn, Si02
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| CN2010105218936A CN101962717A (en) | 2010-10-26 | 2010-10-26 | Raw material treatment and pelletizing system process for rotary hearth furnace |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102622465A (en) * | 2012-01-13 | 2012-08-01 | 冶金自动化研究设计院 | Computer-based rotary hearth furnace simulation system |
| CN103846050A (en) * | 2012-11-28 | 2014-06-11 | 沈阳铝镁设计研究院有限公司 | Fly ash raw material pellet production apparatus |
| CN106282541A (en) * | 2016-09-19 | 2017-01-04 | 山东石横特钢集团有限公司 | A kind of environmental protection closed raw material blending method |
| CN106352703A (en) * | 2016-08-29 | 2017-01-25 | 宝钢发展有限公司 | Automatic batching system production line system of rotary hearth furnace and automatic batching system production line system control method |
| CN109913642A (en) * | 2019-04-30 | 2019-06-21 | 马钢集团设计研究院有限责任公司 | A kind of rotary hearth furnace raw material processing system and its technique |
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| CN1070690A (en) * | 1992-08-21 | 1993-04-07 | 柳州钢铁厂 | The method of dedusting steel-smelting converter mud balling-up |
| CN1594607A (en) * | 2004-06-18 | 2005-03-16 | 攀钢集团成都钢铁有限责任公司 | Method for pellet formation using steel-making slurry |
| CN101435019A (en) * | 2008-12-17 | 2009-05-20 | 马钢设计研究院有限责任公司 | Rotary hearth furnace raw material processing and pelletizing system process |
| CN101713023A (en) * | 2009-11-24 | 2010-05-26 | 马鞍山钢铁股份有限公司 | Forming method for metallurgical industry dust and sludge containing hazardous elements for reduction technology |
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2010
- 2010-10-26 CN CN2010105218936A patent/CN101962717A/en active Pending
Patent Citations (4)
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| CN1070690A (en) * | 1992-08-21 | 1993-04-07 | 柳州钢铁厂 | The method of dedusting steel-smelting converter mud balling-up |
| CN1594607A (en) * | 2004-06-18 | 2005-03-16 | 攀钢集团成都钢铁有限责任公司 | Method for pellet formation using steel-making slurry |
| CN101435019A (en) * | 2008-12-17 | 2009-05-20 | 马钢设计研究院有限责任公司 | Rotary hearth furnace raw material processing and pelletizing system process |
| CN101713023A (en) * | 2009-11-24 | 2010-05-26 | 马鞍山钢铁股份有限公司 | Forming method for metallurgical industry dust and sludge containing hazardous elements for reduction technology |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102622465A (en) * | 2012-01-13 | 2012-08-01 | 冶金自动化研究设计院 | Computer-based rotary hearth furnace simulation system |
| CN103846050A (en) * | 2012-11-28 | 2014-06-11 | 沈阳铝镁设计研究院有限公司 | Fly ash raw material pellet production apparatus |
| CN106352703A (en) * | 2016-08-29 | 2017-01-25 | 宝钢发展有限公司 | Automatic batching system production line system of rotary hearth furnace and automatic batching system production line system control method |
| CN106282541A (en) * | 2016-09-19 | 2017-01-04 | 山东石横特钢集团有限公司 | A kind of environmental protection closed raw material blending method |
| CN109913642A (en) * | 2019-04-30 | 2019-06-21 | 马钢集团设计研究院有限责任公司 | A kind of rotary hearth furnace raw material processing system and its technique |
| CN109913642B (en) * | 2019-04-30 | 2024-04-19 | 马钢集团设计研究院有限责任公司 | Rotary hearth furnace raw material treatment system and process thereof |
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Application publication date: 20110202 |