CN103230922A - Fibrous roller abrasive dust recycling method - Google Patents
Fibrous roller abrasive dust recycling method Download PDFInfo
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- CN103230922A CN103230922A CN2013101292002A CN201310129200A CN103230922A CN 103230922 A CN103230922 A CN 103230922A CN 2013101292002 A CN2013101292002 A CN 2013101292002A CN 201310129200 A CN201310129200 A CN 201310129200A CN 103230922 A CN103230922 A CN 103230922A
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- abrasive dust
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Abstract
The invention discloses a fibrous roller abrasive dust recycling method, which comprises the process steps as follows: (1) adding the abrasive dust into an alkaline solution, heating and stirring for removing grease; (2) after filtering, washing and drying mixed liquor of abrasive dust and water, carrying out heat treatment at inert atmosphere, and obtaining the grease removing abrasive dust; (3) grinding grease removing abrasive dust into powder, and then screening and removing grinding wheel chips in the abrasive dust; (4) carrying out a reduction reaction for screened abrasive dust at a reducing atmosphere, and obtaining the regenerated alloy powder. The method has the characteristics of easily available raw material, low price; simple process operation, low treatment cost; non-secondary pollution, low recycle cost, energy saving and environmental protection; the particle size of the regenerated alloy powder is about 40-60 micrometers, and the impurity clearance reaches to 99.5%, and the sulfur content is lower than 0.011%; the recovery rate of valuable metal recovery in the regenerated alloy is greater than 96%; the method has the characteristics of high impurity clearance and high alloy recovery rate.
Description
Technical field
The present invention relates to a kind of recovery method of roll abrasive dust, especially a kind of recovery method of fibrous roll abrasive dust.
Background technology
There is the grinding roller workshop in each iron and steel enterprise, all can produce a large amount of roll abrasive dusts every day, different roll shops is because the emery wheel of the different needs of roll material also can be different, therefore exist different wear forms can produce different types of abrasive dust, that frequent species has is fibrous, sheet and form of powdery particles.Above-mentioned these scrap are because its particle is tiny and contain nonmetallic inclusion (emery wheel chip) and greasy dirt, this give separate purify, comprehensive utilization brought great difficulty.At present the way of some iron and steel enterprises is that these roll abrasive dusts are returned the sintering recycling, perhaps directly as waste discharge, thereby caused the waste of multiple rare alloy element, and these garbage waste materials of discharging has caused severe contamination to environment.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of recovery method of fibrous roll abrasive dust, to reclaim the alloy in the abrasive dust effectively.
For solving the problems of the technologies described above, the processing step that the present invention takes is:
(1) described abrasive dust joins in alkaline solution, adds thermal agitation to remove grease;
(2) mixed liquor with above-mentioned abrasive dust and water filters, washs, after the drying, heat-treats under inert atmosphere, obtains the abrasive dust that deoils;
(3) the described abrasive dust that deoils grinds and to become Powderedly, and the emery wheel chip in the abrasive dust is removed in screening then;
(4) abrasive dust after the screening carries out reduction reaction under reducing atmosphere, can obtain the secondary alloy powder.
The described alkaline solution of step of the present invention (1) is 80 weight parts waters, 10 weight portion NaOH, 5 weight portion sodium carbonate, 3 weight portion tertiary sodium phosphates and the formulated mixed solution of 2 weight portion sodium metasilicate.Heating whipping temp in the described step (1) is 60～100 ℃; Described mixing speed is 180rpm, and mixing time is 60～120min.
Heat treatment in the step of the present invention (2) is: the speed with 30～50 ℃/min heats up, and is warming up to 200～500 ℃, and constant temperature keeps 10～50min.Described inert atmosphere adopts nitrogen; The mixed liquor of described abrasive dust and water dewaters by suction filtration, 60～100 ℃ hot wash 1～2 time.
Abrasive dust is ground to particle mean size at 40～60 microns in the step of the present invention (3).
Reducing atmosphere in the step of the present invention (4) adopts coke-stove gas or hydrogen.Described reduction reaction is: the speed with 30～50 ℃/min heats up, and is warming up to 650～750 ℃, constant temperature reduction 15～25min.
Technical conceive of the present invention is: because fibrous roll abrasive dust and emery wheel chip and grease mix, make the broken end of emery wheel separate the difficulty that becomes by the method for screening, therefore the present invention proposes first alkali lye oil removing by Overheating Treatment, fibrous abrasive dust is very easily pulverized the pulverize powder by grinding after the heat treatment, and this particles of powder is than little many of emery wheel chip, thereby utilizes screening very easily to remove the emery wheel chip; To remove roll abrasive dust utilization reduction behind emery wheel chip and the grease and the smelting recovery alloy that combines at last.
The beneficial effect that adopts technique scheme to produce is: 1, the used roll for cold rolling abrasive dust of the present invention is steel plant's discarded object, has that raw material are easy to get, cheap characteristics; 2, the every technical process of the present invention is simple to operate, and processing cost is lower, and the fibrous roll abrasive dust that is particularly suited for iron and steel enterprise reclaims; 3, non-secondary pollution in the removal process of the present invention, cost recovery is lower, has the characteristics of energy-conserving and environment-protective; 4, the secondary alloy powder size that obtains of the present invention is about 40～60 microns, and removal of impurity can reach 99.5%, and sulfur content is lower than 0.011%; The recovery of valuable metal is all greater than 96% the rate of recovery in the secondary alloy; Have removal of impurity height, characteristics that alloy recovery is high.
The specific embodiment
The present invention is further detailed explanation below in conjunction with specific embodiment.
Embodiment 1: the recovery method of this fibrous roll abrasive dust, and a large amount of fibrous roll abrasive dust that adopts steel plant cold rolling grinding roller workshop to produce is raw material, its concrete processing step is:
(1) the 500g abrasive dust is joined 75 ℃, in the formulated mixed solution (alkaline solution) of NaOH and sodium carbonate, tertiary sodium phosphate, sodium metasilicate, configuration proportion is 80 weight parts waters, 10 weight portion NaOH, 5 weight portion sodium carbonate, 3 weight portion tertiary sodium phosphates and 2 weight portion sodium metasilicate; Under 75 ℃ of conditions, stir to remove the grease on abrasive dust surface then, thus the grease burning causes environment and equipment when reducing later stage heat treatment grease pollution and infringement; Mixing speed is 180rpm, and mixing time is 100min; Described alkaline solution also can adopt other degreasers, perhaps can produce the alkaline solution of saponification with grease;
(2) mixed liquor of abrasive dust and water dewaters by suction filtration, 60 ℃ hot wash 2 times, freeze-day with constant temperature; Heat-treat then: 33 ℃/min of control programming rate under the nitrogen atmosphere, be warming up to 280 ℃, constant temperature 40min can remove residual grease and obtain the abrasive dust that deoils; Described nitrogen atmosphere also can adopt other inert atmospheres, for example argon gas etc.;
(3) deoil that to grind to form particle mean size be 60 microns Powdered to abrasive dust, abrasive dust is by repeatedly screening then, and because the emery wheel grains of sand (emery wheel scrap) are harder, size is constant all greater than 100 microns after grinding, emery wheel scrap that can granularity is big is removed, 61.2 microns of the abrasive dust particle mean sizes after the screening;
(4) abrasive dust after the screening is to carry out reduction reaction under the reducing atmosphere at hydrogen, and 33 ℃/min of control programming rate is warming up to 680 ℃, constant temperature reductase 12 2min; Last nitrogen protection cool to room temperature namely gets the secondary alloy powder of recovery; Described nitrogen atmosphere also can adopt other inert atmospheres, for example argon gas etc.
The secondary alloy powder mean particle sizes that present embodiment obtains is 61.2 microns, and the fluoremetry removal of impurity reaches 99.5%, and sulfur content is lower than 0.011% in the abrasive dust; The recovery of valuable metal is all greater than 96% the rate of recovery in the secondary alloy.
Embodiment 2: the recovery method of this fibrous roll abrasive dust, and a large amount of fibrous roll abrasive dust that adopts steel plant cold rolling grinding roller workshop to produce is raw material, its concrete processing step is:
(1) the 1000g abrasive dust is joined 85 ℃, in the formulated mixed solution (alkaline solution) of NaOH and sodium carbonate, tertiary sodium phosphate, sodium metasilicate, configuration proportion is 80 weight parts waters, 10 weight portion NaOH, 5 weight portion sodium carbonate, 3 weight portion tertiary sodium phosphates and 2 weight portion sodium metasilicate; Stir to remove the grease on abrasive dust surface under 85 ℃ of conditions then, mixing speed is 180rpm, and mixing time is 80min;
(2) mixed liquor of abrasive dust and water dewaters by suction filtration, 85 ℃ hot wash 2 times, freeze-day with constant temperature; Heat-treat then: 40 ℃/min of control programming rate under the nitrogen atmosphere, be warming up to 350 ℃, constant temperature 35min can remove residual grease and obtain the abrasive dust that deoils;
(3) deoil that to grind to form particle mean size be 40 microns Powdered to abrasive dust, abrasive dust is by repeatedly screening then, and the emery wheel scrap that granularity is big is removed, 38.2 microns of the abrasive dust particle mean sizes after the screening;
(4) abrasive dust after the screening is to carry out reduction reaction under the reducing atmosphere at hydrogen, and 40 ℃/min of control programming rate is warming up to 700 ℃, constant temperature reduction 18min; Last nitrogen protection cool to room temperature namely gets the secondary alloy powder of recovery.
38.2 microns of the secondary alloy powder mean particle sizes that present embodiment obtains, removal of impurity reaches 99.6%, and sulfur content is lower than 0.009% in the abrasive dust; The recovery of valuable metal is all greater than 96% the rate of recovery in the secondary alloy.
Embodiment 3: the recovery method of this fibrous roll abrasive dust, and a large amount of fibrous roll abrasive dust that adopts steel plant cold rolling grinding roller workshop to produce is raw material, its concrete processing step is:
(1) the 2000g abrasive dust is joined 95 ℃, in the formulated mixed solution (alkaline solution) of NaOH and sodium carbonate, tertiary sodium phosphate, sodium metasilicate, configuration proportion is 80 weight parts waters, 10 weight portion NaOH, 5 weight portion sodium carbonate, 3 weight portion tertiary sodium phosphates and 2 weight portion sodium metasilicate; Stir to remove the grease on abrasive dust surface under 95 ℃ of conditions then, mixing speed is 180rpm, and mixing time is 90min;
(2) mixed liquor of abrasive dust and water dewaters by suction filtration, 95 ℃ hot wash 1 time, freeze-day with constant temperature; Heat-treat then: 45 ℃/min of control programming rate under the nitrogen atmosphere, be warming up to 450 ℃, constant temperature 30min can remove residual grease and obtain the abrasive dust that deoils;
(3) deoil that to grind to form particle mean size be 50 microns Powdered to abrasive dust, abrasive dust is by repeatedly screening then, and the emery wheel scrap that granularity is big is removed, 49.7 microns of the abrasive dust particle mean sizes after the screening;
(4) coke-stove gas that produces in process of coking of abrasive dust after the screening is to carry out reduction reaction under the reducing atmosphere, and 45 ℃/min of control programming rate is warming up to 720 ℃, constant temperature reduction 15min; Last nitrogen protection cool to room temperature namely gets the secondary alloy powder of recovery.
49.7 microns of the secondary alloy powder mean particle sizes that present embodiment obtains, removal of impurity reaches 99.4%, and sulfur content is lower than 0.010% in the abrasive dust; The recovery of valuable metal is on average greater than 96% the rate of recovery in the secondary alloy.
Embodiment 4: the recovery method of this fibrous roll abrasive dust, and a large amount of fibrous roll abrasive dust that adopts steel plant cold rolling grinding roller workshop to produce is raw material, its concrete processing step is:
(1) the 1000g abrasive dust is joined 100 ℃, in the formulated mixed solution (alkaline solution) of NaOH and sodium carbonate, tertiary sodium phosphate, sodium metasilicate, configuration proportion is 80 weight parts waters, 10 weight portion NaOH, 5 weight portion sodium carbonate, 3 weight portion tertiary sodium phosphates and 2 weight portion sodium metasilicate; Stir to remove the grease on abrasive dust surface under 100 ℃ of conditions then, mixing speed is 180rpm, and mixing time is 60min;
(2) mixed liquor of abrasive dust and water dewaters by suction filtration, 100 ℃ hot wash 2 times, freeze-day with constant temperature; Heat-treat then: 50 ℃/min of control programming rate under the nitrogen atmosphere, be warming up to 200 ℃, constant temperature 50min can remove residual grease and obtain the abrasive dust that deoils;
(3) deoil that to grind to form particle mean size be 50 microns Powdered to abrasive dust, abrasive dust is by repeatedly screening then, and the emery wheel scrap that granularity is big is removed, 48.6 microns of the abrasive dust particle mean sizes after the screening;
(4) coke-stove gas that produces in process of coking of abrasive dust after the screening is to carry out reduction reaction under the reducing atmosphere, and 30 ℃/min of control programming rate is warming up to 650 ℃, constant temperature reductase 12 5min; Last nitrogen protection cool to room temperature namely gets the secondary alloy powder of recovery.
48.6 microns of the secondary alloy powder mean particle sizes that present embodiment obtains, removal of impurity reaches 99.4%, and sulfur content is lower than 0.011% in the abrasive dust; The recovery of valuable metal is on average greater than 96% the rate of recovery in the secondary alloy.
Embodiment 5: the recovery method of this fibrous roll abrasive dust, and a large amount of fibrous roll abrasive dust that adopts steel plant cold rolling grinding roller workshop to produce is raw material, its concrete processing step is:
(1) the 1000g abrasive dust is joined 60 ℃, in the formulated mixed solution (alkaline solution) of NaOH and sodium carbonate, tertiary sodium phosphate, sodium metasilicate, configuration proportion is 80 weight parts waters, 10 weight portion NaOH, 5 weight portion sodium carbonate, 3 weight portion tertiary sodium phosphates and 2 weight portion sodium metasilicate; Be heated to 80 ℃ of constant temperature and stir, mixing speed is 180rpm, and mixing time is 120min;
(2) mixed liquor of abrasive dust and water dewaters by suction filtration, 70 ℃ hot wash 1 time, freeze-day with constant temperature; Heat-treat then: 30 ℃/min of control programming rate under the nitrogen atmosphere, be warming up to 500 ℃, constant temperature 10min can remove residual grease and obtain the abrasive dust that deoils;
(3) deoil that to grind to form particle mean size be 50 microns Powdered to abrasive dust, abrasive dust is by repeatedly screening then, and the emery wheel scrap that granularity is big is removed, 49.1 microns of the abrasive dust particle mean sizes after the screening;
(4) coke-stove gas that produces in process of coking of abrasive dust after the screening is to carry out reduction reaction under the reducing atmosphere, and 50 ℃/min of control programming rate is warming up to 750 ℃, constant temperature reductase 12 0min; Last nitrogen protection cool to room temperature namely gets the secondary alloy powder of recovery.
49.1 microns of the secondary alloy powder mean particle sizes that present embodiment obtains, removal of impurity reaches 99.5%, and sulfur content is lower than 0.010% in the abrasive dust; The recovery of valuable metal is on average greater than 96% the rate of recovery in the secondary alloy.
Claims (10)
1. the recovery method of a fibrous roll abrasive dust is characterized in that, the processing step of this method is:
(1) described abrasive dust joins in alkaline solution, adds thermal agitation to remove grease;
(2) mixed liquor with above-mentioned abrasive dust and water filters, washs, after the drying, heat-treats under inert atmosphere, obtains the abrasive dust that deoils;
(3) the described abrasive dust that deoils is ground into powder, and the emery wheel chip in the abrasive dust is removed in screening then;
(4) abrasive dust after the screening carries out reduction reaction under reducing atmosphere, can obtain the secondary alloy powder.
2. the recovery method of fibrous roll abrasive dust according to claim 1, it is characterized in that: the heating whipping temp in the described step (1) is 60～100 ℃.
3. the recovery method of fibrous roll abrasive dust according to claim 2, it is characterized in that: the alkaline solution in the described step (1) is 80 weight parts waters, 10 weight portion NaOH, 5 weight portion sodium carbonate, 3 weight portion tertiary sodium phosphates and the formulated mixed solution of 2 weight portion sodium metasilicate.
4. the recovery method of fibrous roll abrasive dust according to claim 3, it is characterized in that: described mixing speed is 180rpm, mixing time is 60～120min.
5. the recovery method of fibrous roll abrasive dust according to claim 1, it is characterized in that: the heat treatment in the described step (2) is: the speed with 30～50 ℃/min heats up, and is warming up to 200～500 ℃, and constant temperature keeps 10～50min.
6. the recovery method of fibrous roll abrasive dust according to claim 1 is characterized in that: the inert atmosphere employing nitrogen in the described step (2).
7. the recovery method of fibrous roll abrasive dust according to claim 1 is characterized in that: the mixed liquor of abrasive dust and water dewaters 60～100 ℃ hot wash 1～2 time in the described step (2) by suction filtration.
8. according to the recovery method of any described fibrous roll abrasive dust of claim 1-7, it is characterized in that: abrasive dust is ground to particle mean size at 40～60 microns in the described step (3).
9. according to the recovery method of any described fibrous roll abrasive dust of claim 1-7, it is characterized in that: the reducing atmosphere in the described step (4) adopts coke-stove gas or hydrogen.
10. the recovery method of fibrous roll abrasive dust according to claim 9 is characterized in that, described reduction reaction is: the speed with 30～50 ℃/min heats up, and is warming up to 650～750 ℃, constant temperature reduction 15～25min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013101292002A CN103230922A (en) | 2013-04-15 | 2013-04-15 | Fibrous roller abrasive dust recycling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101292002A CN103230922A (en) | 2013-04-15 | 2013-04-15 | Fibrous roller abrasive dust recycling method |
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| CN103230922A true CN103230922A (en) | 2013-08-07 |
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| CN2013101292002A Pending CN103230922A (en) | 2013-04-15 | 2013-04-15 | Fibrous roller abrasive dust recycling method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114317955A (en) * | 2021-12-29 | 2022-04-12 | 马鞍山钢铁股份有限公司 | Recycling process of roller grinding mud |
Citations (5)
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| US3997359A (en) * | 1972-11-07 | 1976-12-14 | Joseph Daniel Dankoff | Reclamation of components from grinding swarf |
| CN1076967A (en) * | 1992-10-27 | 1993-10-06 | 赵铁鉴 | The processing method of steel-smelting from waste metal filings |
| CN1465730A (en) * | 2002-06-03 | 2004-01-07 | 孙恒怀 | Method for producing high speed tool steel |
| CN101898247A (en) * | 2010-07-19 | 2010-12-01 | 北京科技大学 | Pollution-free recycling method of iron-based grinding waste material |
| CN102703681A (en) * | 2012-06-01 | 2012-10-03 | 句容市恒祥金属再生利用有限公司 | Method for recovering high-speed tool steel from grinding wheel ash |
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2013
- 2013-04-15 CN CN2013101292002A patent/CN103230922A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3997359A (en) * | 1972-11-07 | 1976-12-14 | Joseph Daniel Dankoff | Reclamation of components from grinding swarf |
| CN1076967A (en) * | 1992-10-27 | 1993-10-06 | 赵铁鉴 | The processing method of steel-smelting from waste metal filings |
| CN1465730A (en) * | 2002-06-03 | 2004-01-07 | 孙恒怀 | Method for producing high speed tool steel |
| CN101898247A (en) * | 2010-07-19 | 2010-12-01 | 北京科技大学 | Pollution-free recycling method of iron-based grinding waste material |
| CN102703681A (en) * | 2012-06-01 | 2012-10-03 | 句容市恒祥金属再生利用有限公司 | Method for recovering high-speed tool steel from grinding wheel ash |
Non-Patent Citations (1)
| Title |
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| 澹凡忠: "高速钢磨屑回收及综合利用研究", 《潍坊高等专科学校学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114317955A (en) * | 2021-12-29 | 2022-04-12 | 马鞍山钢铁股份有限公司 | Recycling process of roller grinding mud |
| CN114317955B (en) * | 2021-12-29 | 2024-01-19 | 马鞍山钢铁股份有限公司 | Recycling process of roller grinding mud |
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Application publication date: 20130807 |