CN104480239A - Method for treating converter slag through hot splashing - Google Patents
Method for treating converter slag through hot splashing Download PDFInfo
- Publication number
- CN104480239A CN104480239A CN201410731032.9A CN201410731032A CN104480239A CN 104480239 A CN104480239 A CN 104480239A CN 201410731032 A CN201410731032 A CN 201410731032A CN 104480239 A CN104480239 A CN 104480239A
- Authority
- CN
- China
- Prior art keywords
- slag
- magnetic separation
- castaway
- discharged
- screening
- 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
Links
- 239000002893 slag Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000007885 magnetic separation Methods 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000012216 screening Methods 0.000 claims description 15
- 238000005245 sintering Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000003507 refrigerant Substances 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000009628 steelmaking Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 17
- 229910052742 iron Inorganic materials 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000007873 sieving Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 238000006253 efflorescence Methods 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 4
- 206010037844 rash Diseases 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 229960001866 silicon dioxide Drugs 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
- 235000020985 whole grains Nutrition 0.000 description 1
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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
-
- 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
The invention relates to a method for treating converter slag through hot splashing. The method comprises the following three steps: cooling, magnetic separation and sieving, wherein in the cooling step, the just discharged converter slag is quickly cooled by adopting hot splashing, so that the converter slag treatment time can be reduced; in the magnetic separation step, initial separation and fine separation are adopted, so that the quality of iron in waste slag can be greatly reduced; all the waste slag can be utilized by carrying out secondary sieving on the waste slag.
Description
Technical field
the present invention relates to a kind of method of hot application process bessemer furnace slag.
Background technology
the slag poured out after converter smelting tapping is a kind of high-temperature material, and the ferric oxide in it is not easily separated with other raw material with ferric oxide by the bessemer furnace slag under the condition of high temperature, if employing Temperature fall, not only temperature fall time is longer, but also can pollute surrounding enviroment; In addition, if iron content is not less than 2% in the slag charge processing bessemer furnace slag, is just not suitable for making the raw material for building such as cement with it, causes it to be a kind of solid waste.
for this reason, name disclosed in No. 102534066A, Chinese patent is called that " a kind of high-temperature molten steel slag treating method " just proposes a kind of scheme.Comprise the following steps in the treatment process of this patent: first detect calcium oxide and aluminium sesquioxide in slag, and the content of silicon-dioxide, then calculate and need to add calcium oxide and aluminium sesquioxide, and the quantity of silicon-dioxide, to improve by supplementing these three kinds of materials, and the slag after improvement is carried out atomization process to form stable granular slag.Although this kind for the treatment of process can make slag be recycled, but because the output of slag is very large, if the slag annual production of a steel enterprise is at least more than more than 100 ten thousand tons, to a large amount of slags carry out improvement add calcium oxide and aluminium sesquioxide, and the amount of silicon-dioxide is also relatively large, cause improvement cost very high; Simultaneously because the slag quality after improvement is also relatively large, also all slags all can not be improved, so major part can be abandoned process for treating steel slag by this kind, thus causes the wasting of resources.
in addition, name disclosed in No. 102688804A, Chinese patent is called that " a kind of method of Footwall drift iron from bessemer furnace slag " proposes a kind of scheme of sieving metallic iron.The method of this kind of Footwall drift iron adopts step sorting, dry type magnetic separation throws tail, selected three segment process of wet type, and in the process of step sorting, first reclaim the slag steel being greater than 70 millimeters, then the slag classification dry type magnetic separation being less than 70 millimeters is thrown tail, rough concentrate further across wholegrain level wet grinding slag sluicing system, and to propose magnetic pulley sorting magneticstrength be 1000-2000Oe.Although this kind of method can Footwall drift iron, the step of Footwall drift iron is carried out in its proposition do not had again after first carrying out hot vexed process or hot application process to slag, cause it to throw in the step of tail can cause environmental pollution in step sorting and dry type magnetic separation; It adopts the magneticstrength of 1000-2000Oe to carry out separation of iron metal simultaneously, and this kind of magnetic separation mode is difficult to ferric oxide to be separated with slag charge with ferric oxide, so, adopt iron content in this kind of isolated waste residue of mode can not lower than 2%, thus make slag charge be not suitable for making the raw material for building such as cement.
Summary of the invention
the object of this invention is to provide a kind of mode utilizing adjustment magneticstrength to carry out magnetic separation and sieve out particle not of the same race to solve refuse and can not be utilized the method with the hot application process bessemer furnace slag of the problem such as contaminate environment.
the method of hot application process bessemer furnace slag proposed by the invention comprises the steps such as cooling, magnetic separation and screening, cooling step wherein utilizes muck loader car to be put into by bessemer furnace slag and turn on slag line to carry out turning over slag, then cool to through turning in the bessemer furnace slag after slag the water sprayed 3-4 days it; Magnetic separation step carries out magnetic separation to the material that cooled bessemer furnace slag isolates less than 300 millimeters, and this kind of magnetic separation adopts 1600 Gauss-2800 Gausses to carry out primary election and to adopt 800 Gausses to carry out to the slag of primary election selected; Screening step be to magnetic separation after castaway slag carry out regrading, first time screening is discharged and is greater than the castaway slag of 20 millimeters, and the castaway slag of 7-20 millimeter is discharged in second time screening.
the refrigerant of castaway slag as steel-making of 7-20 millimeter is discharged in described second time screening.The castaway slag that the is less than 7 millimeters flux as sintering oxidation calcium and ferro element is discharged in the screening of described second time.
the method of hot application process bessemer furnace slag proposed by the invention adopts cooling, magnetic separation and these three steps of screening, and cooling wherein adopts hot application that the bessemer furnace slag of just having discharged is cooled fast, can reduce the time of process bessemer furnace slag; Simultaneously because magnetic separation adopts primary election and selected two kinds of modes, this kind of magnetic separation can reduce the quality containing ferro element in castaway slag greatly, according to detection, contains the quality of ferro element in the castaway slag utilizing this kind of magnetic separation to discharge between the 0.1-2% of total mass; In addition, utilize castaway slag that regrading mode can make particle be more than 20mm as raw material for building, and particle is the castaway slag not easy-sintering of 7-20mm, can be used as the steel refrigerant of refining, particle 0-7mm can make the flux of sintering, causes all castaway slags all can be fully utilized.
embodiment:
first muck loader car is utilized to be put into by hot for converter slag to turn on slag line and carry out turning over slag, again to through to turn in the hot slag of the converter after slag spray or water the water of 3-4 days, when carrying out overturning with power shovel or miscellaneous equipment to it after the hot slag cooling of converter, the less particle efflorescence of ferro element quality is included because can be enable it after bessemer furnace slag water cooling, so, the bessemer furnace slag not being greater than 300 millimeters by the particle of efflorescence is higher containing the quality of ferro element, can be separated and make steel.Then magnetic separation is carried out to the bessemer furnace slag of particle below 300 millimeters, magnetic separation wherein comprises primary election and selected two kinds of modes, in primary election process, magneticstrength adopts 1600 Gauss-1800 Gausses or 1800 Gauss-2200 Gausses or 2200 Gauss-2600 Gausses, then carry out selected, this selected magneticstrength adopts 800 Gausses, regrading is carried out to primary election and selected rear discharged castaway slag, the castaway slag being greater than 20 millimeters is discharged in first time screening, can will be greater than the castaway slag of 20 millimeters as raw material for building, the castaway slag of 7-20 millimeter is discharged in second time screening, can using the refrigerant of the castaway slag of 7-20 millimeter as steel-making, and using the castaway slag that the is less than 7 millimeters flux as sintering oxidation calcium and ferro element.Mode through this kind of magnetic separation and screening can make all castaway slags all utilize, and in castaway slag, iron-holder is less than 2%.
before above-mentioned magnetic separation, if bessemer furnace slag does not have efflorescence, also first cooled bessemer furnace slag efflorescence can be carried out magnetic separation after 1-2 days again.
Claims (3)
1. the method for hot application process bessemer furnace slag, is characterized in that comprising the following steps:
Cooling: utilize muck loader car to be put into by bessemer furnace slag and turn on slag line and carry out turning over slag, then to through turning in the bessemer furnace slag after slag the water sprayed 3-4 days, it is cooled;
Magnetic separation: the material cooled bessemer furnace slag being isolated to less than 300 millimeters carries out magnetic separation, this kind of magnetic separation adopts 1600 Gauss-2800 Gausses to carry out primary election and to adopt 800 Gausses to carry out to the slag of primary election selected;
Screening: carry out regrading to the castaway slag after magnetic separation, the castaway slag being greater than 20 millimeters is discharged in first time screening, and the castaway slag of 7-20 millimeter is discharged in second time screening.
2. method according to claim 1, is characterized in that: the refrigerant of castaway slag as steel-making of 7-20 millimeter is discharged in described second time screening.
3. method according to claim 1, is characterized in that: the castaway slag that the is less than 7 millimeters flux as sintering oxidation calcium and ferro element is discharged in the screening of described second time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410731032.9A CN104480239A (en) | 2014-12-05 | 2014-12-05 | Method for treating converter slag through hot splashing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410731032.9A CN104480239A (en) | 2014-12-05 | 2014-12-05 | Method for treating converter slag through hot splashing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104480239A true CN104480239A (en) | 2015-04-01 |
Family
ID=52754841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410731032.9A Pending CN104480239A (en) | 2014-12-05 | 2014-12-05 | Method for treating converter slag through hot splashing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104480239A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818357A (en) * | 2015-05-25 | 2015-08-05 | 攀枝花钢城集团有限公司 | Blast furnace slag treatment method |
| CN106311728A (en) * | 2016-11-11 | 2017-01-11 | 攀枝花钢城集团有限公司 | Method for recycling metal iron from slag magnetic separation powder |
| CN107385151A (en) * | 2017-07-15 | 2017-11-24 | 山西建龙实业有限公司 | A kind of recovery process of converter slag |
| CN109095795A (en) * | 2018-09-12 | 2018-12-28 | 南京有荣节能科技有限公司 | A kind of method of resource utilization copper smelter slag |
| CN111534652A (en) * | 2020-05-11 | 2020-08-14 | 康海玲 | Steel slag hot splashing device for chemical industry |
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| CN101249498A (en) * | 2008-04-03 | 2008-08-27 | 南京钢铁集团盛达实业有限公司 | Cold steel scoria processing method |
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2014
- 2014-12-05 CN CN201410731032.9A patent/CN104480239A/en active Pending
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818357A (en) * | 2015-05-25 | 2015-08-05 | 攀枝花钢城集团有限公司 | Blast furnace slag treatment method |
| CN106311728A (en) * | 2016-11-11 | 2017-01-11 | 攀枝花钢城集团有限公司 | Method for recycling metal iron from slag magnetic separation powder |
| CN107385151A (en) * | 2017-07-15 | 2017-11-24 | 山西建龙实业有限公司 | A kind of recovery process of converter slag |
| CN109095795A (en) * | 2018-09-12 | 2018-12-28 | 南京有荣节能科技有限公司 | A kind of method of resource utilization copper smelter slag |
| CN111534652A (en) * | 2020-05-11 | 2020-08-14 | 康海玲 | Steel slag hot splashing device for chemical industry |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150401 |