CN1898399A - Recovery of metal and non-metal value in slag - Google Patents
Recovery of metal and non-metal value in slag Download PDFInfo
- Publication number
- CN1898399A CN1898399A CNA2004800345834A CN200480034583A CN1898399A CN 1898399 A CN1898399 A CN 1898399A CN A2004800345834 A CNA2004800345834 A CN A2004800345834A CN 200480034583 A CN200480034583 A CN 200480034583A CN 1898399 A CN1898399 A CN 1898399A
- Authority
- CN
- China
- Prior art keywords
- slag
- described method
- reagent
- added
- per ton
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
A process for the recovery of metallic and non-metallic values from slag comprising adding a mixture of reagents to steel slag at a predetermined rate followed by recovering the metallic values there from.
Description
Invention field
The present invention relates to from slag, reclaim metal and nonmetal value.
The present invention relates in addition by adding suitable additive recovery metal and nonmetal value from the slag that the steel production process produces.
Background of invention
Can produce the waste material of slag form in the production of steel, its tonnage changes with the production technique of steel, but is typically 10 to 20% of the steel that produced.This slag is direct usually or be used for low-end applications after necessarily handling, for example land fill, build road, ballasting or the like.Because slag comprises a large amount of CaO and ferriferous oxide, this low-end applications does not make full use of its potential purposes.
According to the practice that the type of the molten metal that is adopted and/or steel are produced, following compounds has limited the amount of the BOF slag that can utilize again: a high proportion of (one or more) ferriferous oxide and in to a high proportion of phosphorous oxides, and the existence of idle time.Simultaneously, be made of CaO and about 1/5 (one or more) ferriferous oxide near the slag of half, this shows and can carry out the use more favourable than present application to slag.
Goal of the invention
Therefore an object of the present invention is to propose a kind of method that from slag, reclaims metal and nonmetal value, so that make slag more available.
Another object of the present invention is to propose a kind of method that reclaims metal and nonmetal value from slag, so that the BOF slag of bigger quantity is utilized again.
According to the explanation of determining, it is more obvious that these and other objects of the present invention will become.
Summary of the invention
Retain the method for (fort) metal and nonmetal value according to the invention provides from slag.
According to the present invention, this method comprises with schedule speed adds selected reagent in slag.Agents useful for same is the mixture of ferrosilicon, carbon, spar, aluminium, lime, and according to the final objective purposes, each components in proportions is that 100% to 0% of whole reagent do not wait.Preferred but and nonessentially add in molten state.
Steel is poured into after the ladle, in having the slag tube of suitable liner, from steelmaking container, removed slag.Operate the slag tube in the mode of in job shop, carrying out usually, but be placed on the treatment bench with after the refractory lining lid covers nozzle.To make the jet pipe that can inject different reagent by suitable refractory materials descends and to enter the slag tube and begin then to handle.Inject with set rate after the reagent of aequum, stop to handle and with the slag granulation or pour out.The iron bath that forms behind the reagent reducing iron oxides is reclaimed as metal values.Slag after the processing is applicable to different end-uses, comprises the cement manufacturing, iron ore sintering production, desulfurization compound, part replace lime or the like in the steel course of processing.
Carry out pilot scale in the workshop so that set up reducing iron oxides and processing parameter that phosphorus is required in running.The all respects of handling slag moment method for exfoliating have been determined to cause.The accurate amount of agents useful for same and type depend at final application.The consumption of ferrosilicon be slag per ton 0 to 150kg, the consumption of aluminium be slag per ton 0 to 90kg, coke, the consumption of spar and lime be respectively slag per ton 0 to 100kg, 0 to 50kg and 0 to 60kg.The consumption of sweeping gas is 0 to 600 liter of a per minute.
By utilizing this method, can with the iron in the slag and phosphorous oxides from they separately original level be reduced to below 1%.Show among BOF slag reductive accompanying drawing Fig. 1 and shown typical results.This graphic representation has shown the ratio (%) and time dependent Fe and P that adds reagent
2O
5The relation of ratio.
Claims
(according to the modification of the 19th of treaty)
1. from slag, reclaim the method for metal and nonmetal value, this method comprises with set rate adds reagent in slag, subsequently from wherein reclaiming metal values, wherein said pack contains the mixture of ferrosilicon, spar, carbon, aluminium and lime, the addition of described ferrosilicon is that slag per ton 80 is to 150kg, the spathous addition is that slag per ton 20 is to 50kg, the addition of carbon is that slag per ton 0 is to 100kg, the addition of aluminium be slag per ton 0 to 90kg, and the addition of lime is that slag per ton 0 is to 60kg.
2. the described method of claim 1, wherein carbon is coke.
3. the described method of claim 1, wherein the speed with 550 to 600 liters/minute feeds sweeping gas during handling.
4. the described method of claim 1 is wherein preferably added reagent in molten state.
5. the described method of claim 1 wherein reclaims metal values from the molten iron liquid cell that adds reagent formation.
6. the described method of claim 1 wherein after adding reagent, stops to handle and with the slag granulation or pour out.
7. the described method of claim 6 wherein after reclaiming metal values, also is used as cement at 1450 ± 50 ℃ of slags of processing that will obtain down with 4-6% gypsum granulation to 3500 Blaine together.
8. the described method of claim 1 wherein will reclaim the slag of processing that obtains after the metal values and be used for the cement manufacturing, and iron ore sintering production is as desulfurization reagent be used in steel course of processing part replace lime.
Claims (13)
1. reclaim the method for metal and nonmetal value from slag, this method comprises the mixture that adds reagent with set rate in slag, subsequently from wherein reclaiming metal values.
2. the described method of claim 1, wherein said pack contains the mixture of ferrosilicon, carbon, spar, aluminium and lime.
3. the described method of claim 1 is wherein used described reagent with 100% to 0% ratio that does not wait of the mixture of respectively doing for oneself.
4. the described method of claim 1 is wherein added ferrosilicon with the amount of slag 1 to 150kg per ton.
5. the described method of claim 1 is wherein added aluminium with the amount of slag 0 to 90kg per ton.
6. the described method of claim 1 is wherein added coke with the amount of slag 0 to 100kg per ton.
7. the described method of claim 1 is wherein added spar with the amount of slag 0 to 50kg per ton.
8. the described method of claim 1 is wherein added lime with the amount of slag 0 to 60kg per ton.
9. the described method of claim 1, wherein the speed with 0 to 600 liter of per minute feeds sweeping gas during handling.
10. the described method of claim 1 is wherein preferably added reagent in molten state.
11. the described method of claim 1 wherein after adding reagent, stops to handle and with the slag granulation or pour out.
12. the described method of claim 1 wherein reclaims metal values from the molten pig pond of adding reagent formation.
13. the described method of claim 1 wherein will reclaim the slag of processing that obtains after the metal values and be used for the cement manufacturing, iron ore sintering production is as desulfurization reagent be used in steel course of processing part replace lime.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN550/KOL/2003 | 2003-10-24 | ||
| IN550KO2003 | 2003-10-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1898399A true CN1898399A (en) | 2007-01-17 |
Family
ID=34509345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004800345834A Pending CN1898399A (en) | 2003-10-24 | 2004-10-25 | Recovery of metal and non-metal value in slag |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1682684A1 (en) |
| JP (1) | JP2007509239A (en) |
| KR (1) | KR20070004538A (en) |
| CN (1) | CN1898399A (en) |
| WO (1) | WO2005040432A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5324001B2 (en) * | 1973-10-02 | 1978-07-18 | ||
| ZA743607B (en) * | 1974-06-20 | 1975-09-24 | Anglo Amer Corp South Africa | Pyrometallurgical processes |
| JPS51121030A (en) * | 1975-04-16 | 1976-10-22 | Nippon Kokan Kk | Treatment process for melted slag in steel production |
| JP2949221B1 (en) * | 1998-03-03 | 1999-09-13 | 東京大学長 | Treatment method of steelmaking slag by microwave heating |
-
2004
- 2004-10-25 KR KR1020067009905A patent/KR20070004538A/en not_active Application Discontinuation
- 2004-10-25 CN CNA2004800345834A patent/CN1898399A/en active Pending
- 2004-10-25 WO PCT/IN2004/000333 patent/WO2005040432A1/en active Application Filing
- 2004-10-25 EP EP20040806739 patent/EP1682684A1/en not_active Ceased
- 2004-10-25 JP JP2006536262A patent/JP2007509239A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005040432A1 (en) | 2005-05-06 |
| KR20070004538A (en) | 2007-01-09 |
| WO2005040432B1 (en) | 2005-07-07 |
| JP2007509239A (en) | 2007-04-12 |
| EP1682684A1 (en) | 2006-07-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20070117 |