CN101264464A - Purification technique of steel scoria magnetic separation product - Google Patents
Purification technique of steel scoria magnetic separation product Download PDFInfo
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- CN101264464A CN101264464A CN 200710010644 CN200710010644A CN101264464A CN 101264464 A CN101264464 A CN 101264464A CN 200710010644 CN200710010644 CN 200710010644 CN 200710010644 A CN200710010644 A CN 200710010644A CN 101264464 A CN101264464 A CN 101264464A
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- magnetic separation
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- steel scoria
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Abstract
The invention discloses a purification technique of steel slag magnetic separation products, which comprises the following steps: (1) the steel slag magnetic separation product is put into a ball mill and water is added, (2) full grinding is processed, the product is discharged from the exhaust end of the ball mill naturally and divided into up-screen product and below-screen product through a cylinder screen, (3) the up-screen product is divided into block iron and tailings by magnetic pulley, the block iron is dried by dryer to make water content below 2%, (4) the product below screen is divided into overflow and sand-returning by a classifier, and the overflow grade of the classifier is controlled by the size of the spray water, which controls the sand-returning grade of the classifier, and (5) the sand-returning is conveyed into the fine powder feed chute through belt, the classifier overflow is conveyed to the thickener through a pump, and the underflow of the thickener is filtered by the filter and conveyed into the tail powder feed chute. The purification technique of steel slag magnetic separation products has the advantages of no non-magnetic and weakly magnetic material loss, full and complete recovery, raising the content of iron of luppen from 60% to 65% to above 90%, raising the grade of the magnetic separation powder from 40% to 50% to above 60%, raising the content of iron of steel slag product completely, and raising the comprehensive utilization ratio of the steel slag.
Description
Technical field
The present invention relates to a kind of slag treatment process, is a kind of technology that steel scoria magnetic separation product (granulated iron and magnetic separation) is carried out deep processing.
Background technology
Slag is the waste residue of getting rid of in the steelmaking process.Slag is mainly derived from the oxide that forms after the contained element oxidation in molten iron and the steel scrap, the impurity that metal charge is brought into, the slag former of adding such as lime stone, fluorite, silica and oxidant, desulfurization product and furnace lining material of being etched etc.According to the difference of the used type of furnace of steel-making, slag is divided into converter slag, open hearth slag and electric furnace slag.At present, domestic slag process technology is single, generally adopts broken---and magnetic separation sorts, and is used for handling the slag that converter produces as existing 2,400,000 tons of/year magnetic separation processing lines of Anshan iron and steel plant.This production line adopts two sections magnetic pulleys of two sections fragmentations to sort, and the concentrate product after sorting utilizes again again, and the product from failing that sorts (steel scoria magnetic separation product) is granulated iron and magnetic separation.Production line year about 100,000 tons in output granulated iron, the iron-holder of granulated iron is 60%～65%, because of its basicity fluctuation is big, there is certain difficulty in the recycling of loopback blast furnace; Production line year about 40,000 tons of output magnetic separations, magnetic separation grade 40%～50%, the raw material that can not directly produce as blast furnace can only be done agglomerates of sintered pellets and add raw material, return sintering and reuse, but recovery utilization rate is lower.Therefore, need further handle the steel slag utilization rate that improves to steel scoria magnetic separation product.A kind of steel slag magnetically dressing and re-treating process is disclosed although number of patent application is 00123358.0 patent of invention, but because the dressing method of this technology has only adopted magnetic separation, ferrous material to non magnetic or weak magnetic can not in time sort out, causes a certain amount of metal loss.
Summary of the invention
The object of the present invention is to provide a kind of steel scoria magnetic separation product (granulated iron and magnetic separation) purifying technique, avoid the material loss of non magnetic or weak magnetic, it is more abundant, more thorough that material is reclaimed, and improves the steel slag utilization rate.
The object of the present invention is achieved like this, a kind of purification technique of steel scoria magnetic separation product, it is characterized in that steel scoria magnetic separation product is sent into ball mill and added water, the metallic iron that fully grinds in the material of back separates with other materials, under the effect that water flows, naturally discharge through the ball mill exhaust end, the ball mill discharge is divided into sieve through drum sieve and goes up and sieve following two products; Oversize sub-elects piece iron and tailings through magnetic pulley, and piece iron advances piece iron intermediate bin, and tailings enters the tailings storehouse, and after the oven dry of piece iron drying machine, water content is kept to below 2%, enters piece iron finished bin, and tailings turns back to former feed bin owing to contain a spot of metallic iron; Undersize sub-elects overflow and sand return through spiral classifier, above spiral classifier, be provided with shower water, size by the control shower water is controlled the classifier overflow grade, and then control grader sand return grade, the grader sand return enters smart powder powder groove by the belt transportation, classifier overflow is through being pumped to thickener, and thickener underflow enters tail powder powder groove after filtering by filter.
Because the present invention adopts the method that gravity treatment is combined with magnetic separation, avoided the material loss of non magnetic or weak magnetic, it is more abundant, more thorough that material is reclaimed, and the granulated iron iron-holder is brought up to more than 90% by 60%～65%, and the magnetic separation grade is brought up to more than 60% by 40%～50%.Improved the iron-holder of slag product comprehensively, effectively utilized steel slag resource, improved the Multipurpose Utilization of Steel Slag rate, reduced environmental pollution, solved the problem that takies a large amount of soils, created great economic benefit to society.
Description of drawings
Fig. 1 is technological process apparatus image contact figure.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
The present invention is a kind of to purification technique of steel scoria magnetic separation product, is that (the granulated iron iron-holder is 60%～65% to 50～0mm steel scoria magnetic separation product, and granularity is 50～0mm with granularity; The magnetic separation grade is 40%～50%, and granularity is 5～0mm) for raw material, and three kinds of products of final generation are respectively piece iron, smart powder, tail powder through sorting after.This technology both can be handled granulated iron and magnetic separation separately, can also handle the mixed material of granulated iron and magnetic separation.
As shown in Figure 1, raw material is transported to by automobile sorts the workshop, give former feed bin 1 material loading before the mill slag with frontloader, raw material is sent into ball mill 2 by sealing-tape machine before the mill slag, adding water when sending into raw material for ball mill 2, to be made into concentration be 70%～80% material, after material fully grinds in the ball grinding medium filling ratio is 30%～40% ball mill 2, metallic iron in the raw material is separated with other materials, under the effect that water flows, naturally discharge through the ball mill exhaust end, the ball mill discharge is that the drum sieve 3 of 1.5mm is divided into two products, i.e. oversize and undersize through screen size.Oversize sorts through different technology with undersize.
Oversize is that 2000 oersted magnetic pulleys 5 are selected piece iron (grade is more than 90%, and water content is more than 10%) and two kinds of products of tailings through field strength, leaves in respectively in piece iron intermediate bin 4 and the tailings storehouse 6.After 7 oven dry of piece iron drying machine, water content is kept to below 2%, meets the technological requirement of steel mill, leaves in the piece iron finished bin 8, and finished product block iron is transported to steel mill through automobile.The tailings of selecting turns back to former feed bin 1 and sorts again owing to contain a spot of metallic iron.
Undersize sub-elects overflow and two kinds of products of sand return (grade is more than 60%) through spiral classifier 9.Sand return enters smart powder powder groove 13 by the belt transportation, and smart powder is transported to sintering plant through automobile.Classifier overflow is through being pumped to thickener 10, and thickener underflow enters tail powder powder groove 12 after filtering by filter 11, is transported to the tailings field through automobile.
The overflow water of each operation enters and turns back to technological process again after water treatment system is handled and recycle in the technological process.
Claims (5)
1. purification technique of steel scoria magnetic separation product, it is characterized in that steel scoria magnetic separation product is sent into ball mill (2) and added water, the metallic iron that fully grinds in the material of back separates with other materials, under the effect that water flows, naturally discharge through the ball mill exhaust end, the ball mill discharge is divided into sieve through drum sieve (3) and goes up and sieve following two products; Oversize sub-elects piece iron and tailings through magnetic pulley (5), and piece iron advances piece iron intermediate bin (4), and tailings enters tailings storehouse (6), and after piece iron drying machine (7) oven dry, water content is kept to below 2%, enters piece iron finished bin (8), and tailings turns back to former feed bin (1); Undersize sub-elects overflow and sand return through spiral classifier (9), top at spiral classifier (9) is provided with shower water, size by the control shower water is controlled the classifier overflow grade, and then control grader sand return grade, the grader sand return enters smart powder powder groove (13) by the belt transportation, classifier overflow is through being pumped to thickener (10), and thickener underflow enters tail powder powder groove (12) after filtering by filter (11).
2. purification technique of steel scoria magnetic separation product according to claim 1, the concentration that it is characterized in that material in the ball mill is 70%～80%, the ball grinding medium filling ratio of ball mill is 30%～40%, the sieve aperture 〉=1.5mm of drum sieve, and the field strength of magnetic pulley is 2000～2500 oersteds.
3. purification technique of steel scoria magnetic separation product according to claim 1 and 2 is characterized in that steel scoria magnetic separation product is a granulated iron, and granularity is 50～0mm, granulated iron iron-holder 60%～65%.
4. according to claim 1 or 2 described purification technique of steel scoria magnetic separation product, it is characterized in that steel scoria magnetic separation product is a magnetic separation, granularity is 5～0mm, and grade is 40%～50%.
5. according to claim 1 or 2 described purification technique of steel scoria magnetic separation product, it is characterized in that steel scoria magnetic separation product is granulated iron and magnetic separation, wherein the granularity of granulated iron is 50～0mm, iron-holder 60%～65%, the granularity of magnetic separation is 5～0mm, and grade is 40%～50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200710010644 CN101264464B (en) | 2007-03-15 | 2007-03-15 | Purification technique of steel scoria magnetic separation product |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710010644 CN101264464B (en) | 2007-03-15 | 2007-03-15 | Purification technique of steel scoria magnetic separation product |
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| CN101264464A true CN101264464A (en) | 2008-09-17 |
| CN101264464B CN101264464B (en) | 2012-12-12 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823150A (en) * | 2010-05-28 | 2010-09-08 | 攀枝花钢城集团有限公司 | Method for preparing reduced iron powder |
| CN101748222B (en) * | 2008-12-19 | 2012-02-01 | 鞍山钢铁集团公司 | Steel tail slag mud processing technology |
| CN103060493A (en) * | 2012-06-29 | 2013-04-24 | 南京梅山冶金发展有限公司 | Steel slag water washing ball milling manufacture processing craft |
| CN104399584A (en) * | 2014-12-13 | 2015-03-11 | 唐山市丰润区华晨机械维修部 | Dry magnetic separation technology for waste steel slags |
| CN106076506A (en) * | 2016-06-20 | 2016-11-09 | 镇江微鑫钢业有限公司 | A kind of process technique of slag deep processing |
| CN110216009A (en) * | 2019-06-18 | 2019-09-10 | 周涛 | A kind of dressing method of steel slag |
| CN114471937A (en) * | 2022-02-23 | 2022-05-13 | 昆明学院 | Method for comprehensively recovering iron-manganese minerals from silicon-manganese alloy smelting water-quenched slag |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108200C (en) * | 2000-09-08 | 2003-05-14 | 武汉冶金渣环保工程有限责任公司 | Comprehensive utilization of steel slags |
| CN1148458C (en) * | 2000-12-05 | 2004-05-05 | 方新贵 | Steel slag magnetically dressing and re-treating process and equipment |
| JP4017403B2 (en) * | 2002-01-21 | 2007-12-05 | 株式会社クボタ | Sand making system |
| CN1189413C (en) * | 2002-06-19 | 2005-02-16 | 北京高路通科技发展有限公司 | Process for treating steel slag |
| CN1304119C (en) * | 2003-12-15 | 2007-03-14 | 湘潭钢铁集团有限公司 | Process for ball milling and water washing of waste iron and steel slag, slag slurry treatment process, and apparatus therefor |
| JP4736504B2 (en) * | 2005-03-30 | 2011-07-27 | 住友金属工業株式会社 | Recovery method of granular iron in slag |
| CN1924025A (en) * | 2005-08-31 | 2007-03-07 | 安阳钢铁集团有限责任公司 | Process for treating slag steel |
-
2007
- 2007-03-15 CN CN 200710010644 patent/CN101264464B/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101748222B (en) * | 2008-12-19 | 2012-02-01 | 鞍山钢铁集团公司 | Steel tail slag mud processing technology |
| CN101823150A (en) * | 2010-05-28 | 2010-09-08 | 攀枝花钢城集团有限公司 | Method for preparing reduced iron powder |
| CN103060493A (en) * | 2012-06-29 | 2013-04-24 | 南京梅山冶金发展有限公司 | Steel slag water washing ball milling manufacture processing craft |
| CN104399584A (en) * | 2014-12-13 | 2015-03-11 | 唐山市丰润区华晨机械维修部 | Dry magnetic separation technology for waste steel slags |
| CN106076506A (en) * | 2016-06-20 | 2016-11-09 | 镇江微鑫钢业有限公司 | A kind of process technique of slag deep processing |
| CN110216009A (en) * | 2019-06-18 | 2019-09-10 | 周涛 | A kind of dressing method of steel slag |
| CN110216009B (en) * | 2019-06-18 | 2021-01-29 | 周涛 | Method for sorting steel slag |
| CN114471937A (en) * | 2022-02-23 | 2022-05-13 | 昆明学院 | Method for comprehensively recovering iron-manganese minerals from silicon-manganese alloy smelting water-quenched slag |
| CN114471937B (en) * | 2022-02-23 | 2023-04-07 | 昆明学院 | Method for comprehensively recovering iron-manganese minerals from silicon-manganese alloy smelting water-quenched slag |
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| Publication number | Publication date |
|---|---|
| CN101264464B (en) | 2012-12-12 |
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Address after: 114021 Anshan Iron and steel factory, Tiexi District, Liaoning, Anshan Patentee after: ANSHAN STEEL GROUP Co.,Ltd. Patentee after: ANSTEEL GROUP MINING Co.,Ltd. Address before: 114021 Anshan Iron and steel factory, Tiexi District, Liaoning, Anshan Patentee before: Anshan Iron and Steel Group Co.,Ltd. Patentee before: Ansteel Group Mining Co.,Ltd. |
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Effective date of registration: 20230516 Address after: 114000 Anshan Iron and steel plant, Tiexi District, Anshan, Liaoning Patentee after: ANGANG GREEN RESOURCES TECHNOLOGY Co.,Ltd. Patentee after: ANSTEEL GROUP MINING Co.,Ltd. Address before: 114021 Anshan Iron and steel factory, Tiexi District, Liaoning, Anshan Patentee before: ANSHAN STEEL GROUP Co.,Ltd. Patentee before: ANSTEEL GROUP MINING Co.,Ltd. |
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