CN102676712A - Process for cooling stainless steel slag by wet method - Google Patents
Process for cooling stainless steel slag by wet method Download PDFInfo
- Publication number
- CN102676712A CN102676712A CN2012101394389A CN201210139438A CN102676712A CN 102676712 A CN102676712 A CN 102676712A CN 2012101394389 A CN2012101394389 A CN 2012101394389A CN 201210139438 A CN201210139438 A CN 201210139438A CN 102676712 A CN102676712 A CN 102676712A
- Authority
- CN
- China
- Prior art keywords
- slag
- stainless steel
- jar
- cooling
- tank
- 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.)
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Classifications
-
- 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
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
-
- 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
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/07—Receptacle features where the slag is treated open to atmosphere
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/072—Tanks to collect the slag, e.g. water tank
Abstract
The invention discloses a process for cooling stainless steel slag by a wet method. The process comprises the following steps of: cooling naturally for 20 to 24 hours on a cooling station after electric furnace mother solution slag is conveyed from a field; spraying for cooling for 4 to 6 hours, and controlling a slag surface, so that water is not accumulated on the slag surface; standing for 3 to 4 hours, when the maximum temperature of the walls of slag tanks is lower than 120 DEG C and the temperature of an inner core of the steel slag is lower than 300 DEG C, turning the slag over in a slag box, keeping dried in the slag box, and paving by using the massive slag; crushing the turned massive steel slag, wherein massive materials of which the diameter is smaller than 200 millimeters are taken as tank filling materials; transferring the tank filling materials into empty slag tanks to fill up the tank, wherein 3 to 5 tons of tank filling materials are added into each empty slag tank; and conveying the filled slag tanks to a slagging point and receiving the slag, and conveying the received slag to a slag field. The process has the advantages of separating the stainless steel slag from carbon steel slag, along with high cooling speed, high turnover efficiency of the slag tank, a few intermediate link and the like while the problem of tank adhesion is solved.
Description
Technical field
The present invention relates to the stainless steel technical field, be specifically related to a kind of stainless steel slag wet method processing under cooling technology.
Background technology
Stainless steel can produce various slags in steelmaking process, comprise that electric furnace door slag, electric furnace mother liquor are skimmed, refining slag, residual casting slag, and only Baosteel one family will produce about 400,000 tons every year.Slag need be accepted with slag ladle, is transported to the slag field then and topples over.Because the slag temperature is higher, and contains a large amount of molten state materials, directly import and can cause sticking jar of slag in the slag ladle, and need the cleaning slag, this process wastes time and energy has increased cost undoubtedly.For preventing the sticking jar of slag, the way of often taking at present is in slag ladle, to spray the high temperature parting material and fill up a jar processing.
Baosteel adopts wet method processing under cooling technology of spraying and carbon steel hot application slag bonded at present; Its main technique step is: in carbon steel hot application field, carbon steel slag is carried out hot application, turn over the slag ladle pad jar of packing into behind the shovel through forklift then, the slag ladle of accomplishing pad jar is transported to stainless steel slag connects the slag point; Contain warm sludge jar water spray cooling after in air, leaving standstill cooling of slag; Be transported to the slag field then and tumble, the back of tumbling sprays to the spraying station, is transported to carbon steel hot application slag field pad jar after the oven dry once more.
The benefit of this technology is: through spraying slag ladle behind the slag and dry turning over, can avoid the high temperature slag to meet slag and irritate moist and spray quick-fried; Use carbon steel hot application slag pad jar can carry out buffer protection, prolong slag ladle work-ing life the slag ladle bottom.
But this technology also exists some problems, as: spraying process is complicated, need slag ladle be transported to specified spraying point, is unfavorable for that the turnover of slag ladle and transportation cost are high; There is not thoroughly to solve the problem of sticking jar of slag ladle bottom; The carbon steel slag of sneaking into has influenced the second development and utilization of stainless steel slag.
Summary of the invention
The objective of the invention is to provides a kind of stainless steel slag wet method processing under cooling technology to the problem that exists in the above-mentioned prior art, under the prerequisite of safety, environmental protection, reaches the purpose that sticking jar of minimizing and covering slag were irritated, improved all transfer efficients of slag ladle and reduce cost.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of stainless steel slag wet method processing under cooling technology may further comprise the steps:
(1) with the electric furnace mother liquor back naturally cooling 20-24h on the cooling station that appears on the scene that skims;
(2) spray cooling 4-6h, the control top of the slag does not have ponding;
(3) leave standstill 3-4h, be lower than 120 ℃ to slag ladle wall top temperature, when the temperature of slag inner core is lower than 300 ℃, in the slag case, turn over slag, keep dry in the slag case and carry out place mat with block slag;
(4), diameter is expected as the pad jar less than the bulk material of 200mm with the bulk slag crushing of routing up;
(5) above-mentioned pad jar material is transferred in the sky slag ladle fills up jar, add 3 ~ 5t pad in every empty slag ladle and jar expect;
(6) slag ladle that will accomplish pad jar is transported to the deslagging point and connects slag, is transported to the slag field after connecing slag.
The said electric furnace mother liquor preferred stainless steel 400 serial electric furnace mother liquors of skimming are skimmed.
Said pad jar its composition of material and weight percent average out to: CaO45.34%, SiO
229.22%, MgO13.08%, MnO 0.76%, Al
2O
33.04%, Cr
2O
35.35%, other 3.2%, the pad jar the material basicity be 1.56.
Compare and to find out with existing technology; Technology of the present invention has reduced transportation from the carbon steel slag field to the stainless steel slag field, has cancelled the forklift tinning, has embraced tank car transportation and slag ladle spraying link; A pad jar material is gathered materials on the spot from the stainless steel slag field, has saved carbon steel slag pad jar link.
Owing to taked technique scheme; The present invention has following beneficial effect: the electric furnace mother liquor calcium oxide content height of skimming, and the one-tenths branches such as CaO in the pad jar material preparation process in the slag are adsorbed on the slag ladle inwall, form resist and prevent sticking jar; Thereby can cancel the spraying link; Raise the efficiency, reduce cost, increase economic efficiency; Simultaneously, the electric furnace mother liquor density height of skimming has good high temperature resistance slag performance, anti-liquid steel slag impact property, can prevent effectively that stainless steel from sticking jar of slag ladle, avoiding the erosion damage of slag slag, guarantees that slag ladle turns over jar rate and improves turnover rate; Realize separating of stainless steel slag and carbon steel slag, for stainless steel slag second development and utilization purity has been made assurance, can save a large amount of carbon steel slag simultaneously; Reduce middle-chain, reduced workload, improved environment; Accelerate the speed of cooling of stainless steel slag, helped the turnover of slag ladle.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.
Embodiment:
(1) uses 17M
3The stainless steel slag of slag ladle splendid attire 400 series, handling rests on naturally cooling in the air to open-air cooling field; After air cooling in 20 hours; Beginning discontinuous measurement tank wall temperature is when the tank skin top temperature is 170 ℃ or more during low temperature, with the uninterrupted direct spray water in the surface of the slag in slag ladle of spray hydraulic giant; Drench cooling 4 ~ 6 hours, do not had this moment the melt slag to exist; The control top of the slag does not have ponding, if any the clear ponding of ponding, leaves standstill, and treats that the tank skin top temperature is lower than 120 ℃, when the temperature of slag inner core is lower than 300 ℃, the slag filling is transported to the stainless steel slag refuse, in the slag case, turns over slag; The bulk slag of routing up carries out fragmentation with the pneumatic pick machine, and cooling several times is progressively broken, and the bulk material below the diameter 200mm is expected as the pad jar;
(2) pick up block electric furnace mother liquor pad jar material with grab-crane, mention, move, put into slag ladle bottom lightly, slowly unclamp, mention grab bucket, fill up a jar operation, every empty slag ladle 3 ~ 5t pad of packing into jar is expected;
(3) with an armful tank car slag ladle is transported to stainless steel deslagging point once more and connects slag.
To spray bubble and drench the refrigerative effect in order to improve, to soak in the cooling step used spray hydraulic giant be one to have the spray hydraulic giant of waterfog head to spray in the present embodiment, and the spray angle of coverage is 120 degree, and the spraying cooling water flow is at 0.9 ~ 1m
3/ h.
The present invention has added the air cooling step before spray soaks cooling step, the heat energy of high-temperature liquid state slag is evenly discharged, and has guaranteed the slag cooling performance, effectively prevents there is the liquid state slag in the slag ladle, thereby avoids when turning over slag, meeting water and spray quick-fried.
Prepared pad jar material has composition as shown in table 1:
Table 1
Basicity M=CaO%/SiO
2%=1.56
The foregoing description is interpreted as only being used to the present invention is described and is not used in restriction protection scope of the present invention.After the content of having read the present invention's record, those skilled in the art can do various changes or modification to the present invention, and these equivalences change and modify and fall into claim of the present invention institute restricted portion equally.
Claims (3)
1. a stainless steel slag wet method processing under cooling technology is characterized in that, may further comprise the steps:
(1) with the electric furnace mother liquor back naturally cooling 20-24h on the cooling station that appears on the scene that skims;
(2) spray cooling 4-6h, the control top of the slag does not have ponding;
(3) leave standstill 3-4h, be lower than 120 ℃ to slag ladle wall top temperature, when the temperature of slag inner core is lower than 300 ℃, in the slag case, turn over slag, keep dry in the slag case and carry out place mat with block slag;
(4), diameter is expected as the pad jar less than the bulk material of 200mm with the bulk slag crushing of routing up;
(5) above-mentioned pad jar material is transferred in the sky slag ladle fills up jar, add 3 ~ 5t pad in every empty slag ladle and jar expect;
(6) slag ladle that will accomplish pad jar is transported to the deslagging point and connects slag, is transported to the slag field after connecing slag.
2. stainless steel slag wet method processing under cooling technology as claimed in claim 1 is characterized in that, said electric furnace mother liquor is skimmed and skimmed for stainless steel 400 serial electric furnace mother liquors.
3. stainless steel slag wet method processing under cooling technology as claimed in claim 1 is characterized in that, said pad jar its composition of material and weight percent average out to: CaO45.35%, and MgO 13.08%, SiO
229.22%, MnO0.76%, Al
2O
33.04%, Cr
2O
35.35%, other 3.2%, the pad jar the material basicity be 1.56.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101394389A CN102676712A (en) | 2012-05-07 | 2012-05-07 | Process for cooling stainless steel slag by wet method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101394389A CN102676712A (en) | 2012-05-07 | 2012-05-07 | Process for cooling stainless steel slag by wet method |
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|---|---|
| CN102676712A true CN102676712A (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101394389A Pending CN102676712A (en) | 2012-05-07 | 2012-05-07 | Process for cooling stainless steel slag by wet method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909358A (en) * | 2012-10-25 | 2013-02-06 | 攀钢集团西昌钢钒有限公司 | Method for reducing loss of refractory material of slag-receiving pot of RH furnace steel ladle vehicle |
| CN104404181A (en) * | 2014-11-27 | 2015-03-11 | 中冶宝钢技术服务有限公司 | Iron and steel slag wet process processing method |
| CN108251582A (en) * | 2018-02-06 | 2018-07-06 | 北京雪迪龙环境工程技术有限公司 | A kind of hot vanadium slag treatment method |
| CN109321697A (en) * | 2018-10-31 | 2019-02-12 | 芜湖新兴铸管有限责任公司 | Device and steel slag hot splashing method for steel slag hot splashing |
| CN112695142A (en) * | 2020-12-09 | 2021-04-23 | 钢城集团凉山瑞海实业有限公司 | Method for preventing metallurgical slag pot from bonding |
Citations (3)
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|---|---|---|---|---|
| CN1935393A (en) * | 2005-09-21 | 2007-03-28 | 上海宝钢冶金建设公司 | Large slag ladle spraying process |
| CN101333082A (en) * | 2007-06-25 | 2008-12-31 | 宝钢集团上海第一钢铁有限公司 | Method for treating stainless steel smelting slag |
| CN101342540A (en) * | 2008-08-25 | 2009-01-14 | 中冶宝钢技术服务有限公司 | Method for recycling casting residue |
-
2012
- 2012-05-07 CN CN2012101394389A patent/CN102676712A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1935393A (en) * | 2005-09-21 | 2007-03-28 | 上海宝钢冶金建设公司 | Large slag ladle spraying process |
| CN101333082A (en) * | 2007-06-25 | 2008-12-31 | 宝钢集团上海第一钢铁有限公司 | Method for treating stainless steel smelting slag |
| CN101342540A (en) * | 2008-08-25 | 2009-01-14 | 中冶宝钢技术服务有限公司 | Method for recycling casting residue |
Non-Patent Citations (1)
| Title |
|---|
| 胡治春: "国内外碳钢钢渣典型处理工艺的比较及趋势分析", 《中国高新技术企业》, 31 March 2012 (2012-03-31), pages 112 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909358A (en) * | 2012-10-25 | 2013-02-06 | 攀钢集团西昌钢钒有限公司 | Method for reducing loss of refractory material of slag-receiving pot of RH furnace steel ladle vehicle |
| CN102909358B (en) * | 2012-10-25 | 2015-05-20 | 攀钢集团西昌钢钒有限公司 | Method for reducing loss of refractory material of slag-receiving pot of RH furnace steel ladle vehicle |
| CN104404181A (en) * | 2014-11-27 | 2015-03-11 | 中冶宝钢技术服务有限公司 | Iron and steel slag wet process processing method |
| CN104404181B (en) * | 2014-11-27 | 2019-03-08 | 中冶宝钢技术服务有限公司 | Steel slag wet treatment method |
| CN108251582A (en) * | 2018-02-06 | 2018-07-06 | 北京雪迪龙环境工程技术有限公司 | A kind of hot vanadium slag treatment method |
| CN109321697A (en) * | 2018-10-31 | 2019-02-12 | 芜湖新兴铸管有限责任公司 | Device and steel slag hot splashing method for steel slag hot splashing |
| CN112695142A (en) * | 2020-12-09 | 2021-04-23 | 钢城集团凉山瑞海实业有限公司 | Method for preventing metallurgical slag pot from bonding |
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Application publication date: 20120919 |