CN106702070A - KR desulfuration slag thermal state recycling method - Google Patents
KR desulfuration slag thermal state recycling method Download PDFInfo
- Publication number
- CN106702070A CN106702070A CN201611147973.3A CN201611147973A CN106702070A CN 106702070 A CN106702070 A CN 106702070A CN 201611147973 A CN201611147973 A CN 201611147973A CN 106702070 A CN106702070 A CN 106702070A
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- CN
- China
- Prior art keywords
- slag
- desulfuration
- ladle
- desulfurization
- molten iron
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- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a KR desulfuration slag thermal state recycling method and belongs to the technical field of steelmaking liquid iron pretreatment. A desulfuration slag thermal state slag adding device is arranged on a liquid iron conveying line. Desulfuration slag in a ladle is dug (dredged) through a slag digging (slag dredging) machine; a slag plate is used for containing desulfuration slag; a slag plate conveying vehicle is used for achieving conveying between a slag plate slag collecting position and a slag adding position; a desulfuration slag adding device is used for achieving lifting and overturning actions of the slag plate; and finally the purpose of desulfuration slag thermal state recycling is achieved. The KR desulfuration slag thermal state recycling method has the beneficial effects that a desulfuration agent which is not completely reacted in the desulfuration slag is sufficiently utilized, iron lost in the slag digging process is recycled in a thermal state, and therefore unit consumption of the desulfuration agent and losses of liquid iron are reduced; and sensible heat brought away by slag digging is recycled to the maximum degree.
Description
Technical field
The invention belongs to hot metal in steelmaking preconditioning technique field, more particularly to a kind of KR desulfurization slags eat method hot time.
Background technology
KR method desulfurization is by the agitating paddle in cheap desulfurizing agent (lime+fluorite) addition molten iron and by inserting in molten iron
Agitation molten iron promotes [S] in desulfurizing agent and molten iron that chemical reaction generation high melting compound occurs into realizing desulfurization in slag
Purpose.
Substantial amounts of cold conditions desulfurizing agent need to be added when carrying out desulfurization using KR methods, cause temperature drop in molten iron processing procedure compared with
Greatly, cause molten iron relatively low into the temperature of converter.The addition of substantial amounts of cold conditions desulfurizing agent simultaneously causes the desulfurization quantity of slag larger, skims
Iron loss is increased.The follow-up processing cost of the temperature loss of molten iron, iron loss loss, desulfurization slag produces negative shadow to the benefit of enterprise
Ring.
Desulfurizing agent understands condensation growth into several millimeters of spherical materials to tens of milliseconds of diameter during molten iron is involved in,
Cause cannot to occur inside desulfurizing agent to chemically react and be directly entered in slag and remove.The desulfurization slag for removing is typically vexed using watering heat
Mode directly process, during this CaO hydrolysis generation Ca (OH)2And lose its value for continuing with.Using this
Processing mode has that desulfurization slag sensible heat loss, sorbent utilization are low, desulfurization slag treating capacity is big, solid waste,
It is unfavorable for that enterprise carries out cost efficiency and develops a circular economy.
The content of the invention
Method is eaten it is an object of the invention to provide a kind of KR desulfurization slags hot time, it is low to solve sorbent utilization, takes off
The big problem of sulphur slag sensible heat loss.
The hot desulfurization slag that first iron clad water is removed is directly added into the second iron clad water after being contained using slag pan, then again
Desulfurization process are carried out to the second iron clad water.With unreacted desulfurizing agent in the sensible heat and slag that make full use of hot desulfurization slag, and return
Receive the iron in slag.Raising sorbent utilization is reached, steel technology is reduced, is reduced processing procedure temperature drop, improves efficiency
With the purpose for reducing the desulfurization quantity of slag.Its principle is：Desulfurization slag after KR treatment exists in the form for condensing grain, and slag pan is dropped down onto taking off
During due to surface temperature drop and the percussion of freely falling body, condense grain disintegration and form new unreacted interface.To remove
Hot slag be added directly into again in the second iron clad water, unreacted high temperature desulfuration agent continues to participate in desulphurization reaction in slag so that
The addition of cold conditions desulfurizing agent is reduced, the desulfurization quantity of slag is reduced.
Realize that vehicle equipment of the invention includes：Ladle, molten iron tumble transport vehicle, take off slag system, slag pan and slag pan fortune
The hot slag adding machine of defeated system, desulfurization slag, dust pelletizing system, monitoring system, crane system.
A kind of KR desulfurization slags eat method for hot time, and specific steps and parameter are as follows：
1st, ladle is tumbled in the range of 0-45 ° using molten iron transport vehicle of tumbling, until desulfurization slag i.e. will be from molten iron
Untill bag bag mouth overflows, the desulfurization slag on molten iron surface is removed using Cinder Machine, using slag pan slag；
2nd, after the completion of skimming, ladle return, molten iron tumble transport vehicle by ladle be transported to bull ladle position, using crane in factory
Molten iron is blended into converter；
3rd, slag pan transport vehicle transports to slag position is added the slag pan for containing hot desulfurization slag, and slag pan is tied automatically with slag adding machine
Close, slag pan is risen into deslagging position using the enhanced feature of slag adding machine；
4th, crane handling the second iron clad water to molten iron is tumbled on transport vehicle in factory, and be transported to for ladle by molten iron transport vehicle of tumbling
Plus slag position；
5th, slag adding machine fascinates to 70-90 ° (mobility adjustment of the angle according to slag in slag pan) slag pan, hot in slag pan
Slag free skating is dropped down onto in ladle；Plus the flue dust produced during slag enters dust pelletizing system filtration treatment after flue gas cover supplementary set；
6th, plus slag is completed, slag pan return is simultaneously waited in deslagging position, and the second iron clad water is delivered to treatment by molten iron transport vehicle of tumbling
Position carries out desulfurization process.
The advantage of the invention is that：
1st, the characteristic of the new reaction interface of the easy disintegration stroke of grain surface cooling is condensed using desulfurization slag, hot desulfurization slag is led to
Cross relevant carriers equipment to be added in the second iron clad water, unreacted desulfurizing agent efficient circulation is utilized, reduces total slag in realizing slag
The purpose of amount.And make full use of the sensible heat of desulfurization slag and reclaim the iron loss in slag, it is that enterprise carries out cost efficiency, development circulation warp
Ji, construction green energy conservation type enterprise provide power-assisted.
2nd, carry out one cycle to desulfurization slag to utilize compared with not utilizing, sorbent consumption can reduce by 30%, hot metal temperature drop
10 DEG C of relative reduction, total quantity of slag and iron loss also have remarkable improvement.
3rd, slag process is entirely added to take unattended operation.Monitored by high-definition camera and related chain control, slag pan
Transport-slag pan combined with slag adding machine-and slag adding machine lifting slag pan-slag adding machine verts slag pan plus slag whole process need not
Personnel intervene, and do not increase job position.
Brief description of the drawings
Fig. 1 eats process chart hot time for desulfurization slag.
Fig. 2 eats vehicle equipment hot time for desulfurization slag.Wherein, molten iron tumble transport vehicle 1, Cinder Machine 2, slag pan 3, slag pan fortune
The hot slag adding machine 6 of defeated car 4, ladle 5, desulfurization slag, flue gas supplementary set cover 7, monitoring system 8, crane 9.
Specific embodiment
Embodiment 1
Molten iron tumble transport vehicle 1 drive desulfurization after the completion of ladle 5 vert to angle of skimming, Cinder Machine 2 removes molten iron
Desulfurization slag in bag 5.The desulfurization slag for removing is contained using slag pan 3；
Skim completion, ladle 5 returns back to orthostatic position, molten iron transport vehicle 1 of tumbling transports ladle 5 to bull ladle position, crane 9
Hang ladle 5 to converter iron making；
Slag pan transport vehicle 4 transports slag pan 3 to slag position is added, and slag pan 3 is combined automatically with the hot slag adding machine 6 of desulfurization slag, desulfurization
The hot slag adding machine 6 of slag (the hot slag adding machine 6 of desulfurization slag has lifting and function of verting) lifts slag pan to deslagging position.Slag ladle is transported
Defeated car 4 is back to slag position；
The second iron clad of handling water 5 to the molten iron of crane 9 is tumbled on transport vehicle 1, molten iron tumble transport vehicle 1 transport ladle 1 to
Plus slag position；
The hot slag adding machine 6 of desulfurization slag is verted 3 to 75 ° of slag pan, and desulfurization slag is slid to ladle 5 in slag pan 3.Plus slag mistake
The flue dust that journey is produced enters dust pelletizing system after flue gas supplementary set cover 7 is collected.Plus slag process is by the Dynamic Announce of monitoring system 8；
Determined by monitoring system 8 plus slag performance, plus after the completion of slag, the hot slag adding machine 6 of desulfurization slag carries slag pan 3
Waited in deslagging position.Molten iron tumbles the transport return desulfurization process of ladle 5 of transport vehicle 1 to carry out desulfurization process.
Claims (1)
1. a kind of KR desulfurization slags eat method hot time, it is characterised in that specific steps and parameter are as follows：
1) ladle is tumbled in the range of 0-45 ° using molten iron transport vehicle of tumbling, until desulfurization slag i.e. will be from ladle bag
Untill mouth overflows, the desulfurization slag on molten iron surface is removed using Cinder Machine, using slag pan slag；
2) after the completion of skimming, ladle return, molten iron tumble transport vehicle by ladle be transported to bull ladle position, molten iron is converted using crane
Enter converter；
3) slag pan transport vehicle transports to slag position is added the slag pan for containing hot desulfurization slag, and slag pan is combined automatically with slag adding machine, profit
Slag pan is risen into deslagging position with the enhanced feature of slag adding machine；
4) crane handling the second iron clad water to molten iron is tumbled on transport vehicle, molten iron tumble transport vehicle by ladle be transported to plus slag position；
5) slag adding machine fascinates to 70-90 ° slag pan, during hot slag free skating drops down onto ladle in slag pan；Plus produced during slag
Raw flue dust enters dust pelletizing system filtration treatment after flue gas cover supplementary set；
6) plus slag complete, slag pan return simultaneously deslagging position wait, molten iron tumble transport vehicle by the second iron clad water deliver to treatment position enter
Row desulfurization process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611147973.3A CN106702070A (en) | 2016-12-13 | 2016-12-13 | KR desulfuration slag thermal state recycling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611147973.3A CN106702070A (en) | 2016-12-13 | 2016-12-13 | KR desulfuration slag thermal state recycling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106702070A true CN106702070A (en) | 2017-05-24 |
Family
ID=58937289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611147973.3A Pending CN106702070A (en) | 2016-12-13 | 2016-12-13 | KR desulfuration slag thermal state recycling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106702070A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109182648A (en) * | 2018-08-08 | 2019-01-11 | 鞍钢股份有限公司 | A method of sulphur free-cutting steel is produced using desulphurization and slag skimming iron |
| CN112899428A (en) * | 2021-01-14 | 2021-06-04 | 安徽工业大学 | Method for recycling KR desulfurization slag |
| CN115323096A (en) * | 2022-07-14 | 2022-11-11 | 首钢京唐钢铁联合有限责任公司 | Two-step molten iron desulphurization method |
| CN115627312A (en) * | 2022-09-19 | 2023-01-20 | 首钢京唐钢铁联合有限责任公司 | Method for desulfurizing molten iron |
Citations (5)
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|---|---|---|---|---|
| KR20020089843A (en) * | 2001-05-24 | 2002-11-30 | 주식회사 포스코 | Method for recycling desulphurizing agent |
| JP2004244706A (en) * | 2003-02-17 | 2004-09-02 | Nippon Steel Corp | Slag recycling method |
| JP2007332403A (en) * | 2006-06-13 | 2007-12-27 | Jfe Steel Kk | Method for desulfurizing molten iron |
| KR20120001571A (en) * | 2010-06-28 | 2012-01-04 | 현대제철 주식회사 | Method of desulfuration of return molten steel using slag made in kr desulfuration process |
| TW201638340A (en) * | 2015-04-27 | 2016-11-01 | 杰富意鋼鐵股份有限公司 | Method of recycling a desulfurization slag |
-
2016
- 2016-12-13 CN CN201611147973.3A patent/CN106702070A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020089843A (en) * | 2001-05-24 | 2002-11-30 | 주식회사 포스코 | Method for recycling desulphurizing agent |
| JP2004244706A (en) * | 2003-02-17 | 2004-09-02 | Nippon Steel Corp | Slag recycling method |
| JP2007332403A (en) * | 2006-06-13 | 2007-12-27 | Jfe Steel Kk | Method for desulfurizing molten iron |
| KR20120001571A (en) * | 2010-06-28 | 2012-01-04 | 현대제철 주식회사 | Method of desulfuration of return molten steel using slag made in kr desulfuration process |
| TW201638340A (en) * | 2015-04-27 | 2016-11-01 | 杰富意鋼鐵股份有限公司 | Method of recycling a desulfurization slag |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109182648A (en) * | 2018-08-08 | 2019-01-11 | 鞍钢股份有限公司 | A method of sulphur free-cutting steel is produced using desulphurization and slag skimming iron |
| CN112899428A (en) * | 2021-01-14 | 2021-06-04 | 安徽工业大学 | Method for recycling KR desulfurization slag |
| CN115323096A (en) * | 2022-07-14 | 2022-11-11 | 首钢京唐钢铁联合有限责任公司 | Two-step molten iron desulphurization method |
| CN115323096B (en) * | 2022-07-14 | 2023-12-22 | 首钢京唐钢铁联合有限责任公司 | Two-step desulfurization method for molten iron |
| CN115627312A (en) * | 2022-09-19 | 2023-01-20 | 首钢京唐钢铁联合有限责任公司 | Method for desulfurizing molten iron |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170524 |
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| WD01 | Invention patent application deemed withdrawn after publication |