CN102703681A - Method for recovering high-speed tool steel from grinding wheel ash - Google Patents
Method for recovering high-speed tool steel from grinding wheel ash Download PDFInfo
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- CN102703681A CN102703681A CN2012101772433A CN201210177243A CN102703681A CN 102703681 A CN102703681 A CN 102703681A CN 2012101772433 A CN2012101772433 A CN 2012101772433A CN 201210177243 A CN201210177243 A CN 201210177243A CN 102703681 A CN102703681 A CN 102703681A
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Abstract
The invention relates to a method for recovering high-speed tool steel from grinding wheel ash. The method comprises the following steps of: 1) removing oil from the grinding wheel ash; 2) performing magnetic separation to obtain grinding wheel particles; and 3) smelting to obtain the high-speed tool steel. By the method, at least 0.4 ton of adhesive particles can be separated out by treating one ton of the grinding wheel ash and can be used as the adhesive particle raw materials of a grinding wheel factory, so that the adhesive particles can be prevented from entering a smelting link to form waste residues and smoke. Compared with the conventional method, the method has the advantages that energy consumption can be saved by over 30 percent, the discharge of smoke in the smelting process is reduced obviously, and the energy consumption can be reduced; the method is high in social and ecological benefit; and after magnetic separation, the grade of concentrate can reach over 75 percent, the grade of tailings is reduced to below 5 percent, and the recovery rate of steel scrap can reach over 90 percent.
Description
Technical field
The present invention relates to a kind of recovery method, especially relate to a kind of method that from the emery wheel ash, reclaims high-speed tool steel.
Background technology
Rapid tool steel is claimed high-speed steel, high-speed tool steel again, is widely used in cutting tool, mould, roll and mechanical component etc.In Grinding Process, generate a large amount of high-speed tool steel emery wheel ashes, its composition is mainly steel cuttings, machining oil, emery wheel abrasive particle.Before last century end, high-speed tool steel emery wheel ash directly discharges as waste residue basically, perhaps is used to build highway and the cement baking goods.
In recent years, international iron ore price skyrockets, and the high-speed tool steel price is also high, and as a kind of important renewable resource, high-speed tool steel emery wheel ash receives the attention of regenerated metal enterprise day by day.
Domestic general high-speed tool steel emery wheel ash reclaims enterprise, is basically the emery wheel ash directly to be dropped into electric arc furnace or intermediate frequency furnace carry out fusion, produces high-speed tool steel crude steel ingot.This traditional technology major defect is: waste residue, discharge amount of exhaust gas are big, and finished product steel ingot carbon content is high, poor quality; And owing to contain the emery wheel abrasive particles such as emergy of 12-18% in the emery wheel ash; Do not elect if do not pick the emery wheel abrasive particle, directly melting can increase inessential energy consumption, reduce the crude steel quality.
Summary of the invention
Be to solve the deficiency of prior art, the object of the present invention is to provide a kind of energy-conservation, method that from the emery wheel ash, reclaims high-speed tool steel of improving the recovery.
For achieving the above object, the present invention realizes through following technical scheme:
A kind of method that from the emery wheel ash, reclaims high-speed tool steel may further comprise the steps:
(1) emery wheel ash de-oiling: at first the emery wheel ash is placed in the heating tank; The control furnace temp is about 100-150 ℃; Insulation 1.5-2.5h; Emery wheel ash drying becomes loose powder; Carry out the de-oiling operation then; Will emery wheel ash join in the rinse bath after mixing with cleaning agent, after the stirring through after 3-5 the rinsing with the grey drying of the emery wheel of de-oiling;
(2) magneticly elect the emery wheel particle: utilize half adverse current type magnetic separator to carrying out magnetic separation through the emery wheel ash after step (1) de-oiling; Wherein said half adverse current type magnetic separator adopts rare-earth Nd-Fe-B and Ferrite Material as magnetic to be; Magnet drum magnetic is cornerite 120-135 °; Magnet drum surface maximum field 100-500 mT magneticly elects the emery wheel abrasive particle;
(3) melting: step (2) is put into intermediate frequency furnace through the emery wheel ash after the magnetic separation smelt, obtain high-speed tool steel.
Further, before the step of carrying out the described magnetic separation of step (2), also comprise the emery wheel ash after the de-oiling is carried out broken step.
And before the step of carrying out the described melting of step (3), also comprise the emery wheel ash after the magnetic separation is carried out the agglomerating step.
The invention has the beneficial effects as follows: utilize 1 ton of emery wheel ash of the every processing of method of the present invention, separablely go out at least 0.4 ton of abrasive particle,, smelt link and form waste residue and flue dust thereby avoid it to get into as the abrasive particle raw material of grinding wheel factory.Compare with ordinary method, but the present invention's energy efficient has significantly reduced smoke discharge amount in the smelting process more than 30%; Reduced energy consumption, had higher social ecological benefits, wherein pass through magnetic separation after; The fine fodder grade reaches more than 75%, and the tailings grade is reduced to below 5%, and the steel cuttings recovery is more than 90%.
Embodiment
Below in conjunction with specific embodiment the present invention is done concrete introduction.
A kind of method that from the emery wheel ash, reclaims high-speed tool steel may further comprise the steps:
(1) emery wheel ash de-oiling: at first the emery wheel ash is placed in the heating tank; The control furnace temp is about 100-150 ℃; Insulation 1.5-2.5h, emery wheel ash drying becomes loose powder, carries out the de-oiling operation then; Join in the rinse bath after emery wheel ash and clean-out system mixed, after the stirring through after 3-5 the rinsing with the grey drying of the emery wheel of de-oiling; Remove the emery wheel particle and other impurity that still contain in the smeary emery wheel ash about 10%,, make high speed steel filings of grinding and emery wheel particle sintering together owing in the process of grinding, can produce a large amount of grinding heats.For the emery wheel abrasive particle is sorted out from high speed steel filings of grinding, also comprise the emery wheel ash after the de-oiling is carried out broken step;
(2) magneticly elect the emery wheel particle: utilize half adverse current type magnetic separator to carrying out magnetic separation through the emery wheel ash after step (1) de-oiling and the fragmentation; Wherein said half adverse current type magnetic separator adopts rare-earth Nd-Fe-B and Ferrite Material as magnetic to be; Magnet drum magnetic is cornerite 120-135 °; Magnet drum surface maximum field 100-500 mT magneticly elects the emery wheel abrasive particle; Emery wheel ash staple after the magnetic separation is a steel cuttings, because its density is smaller, and very loose, therefore also comprise the emery wheel ash after the magnetic separation is carried out the agglomerating step.
(3) melting: the emery wheel ash behind step (2) process magnetic separation and the sintering is put into intermediate frequency furnace smelt, obtain high-speed tool steel.
In following examples, the granularity of used emery wheel ash is 200 orders.
Embodiment 1:
A kind of method that from the emery wheel ash, reclaims high-speed tool steel may further comprise the steps:
(1) emery wheel ash de-oiling: at first the emery wheel ash is placed in the heating tank; The control furnace temp is about 150 ℃; Insulation 2.5h, emery wheel ash drying becomes loose powder, carries out the de-oiling operation then; Join in the rinse bath after emery wheel ash and clean-out system mixed, after the stirring through after 5 rinsings with the emery wheel ash drying of de-oiling; Remove the emery wheel particle and other impurity that still contain in the smeary emery wheel ash about 10%,, make high speed steel filings of grinding and emery wheel particle sintering together owing in the process of grinding, can produce a large amount of grinding heats.For the emery wheel abrasive particle is sorted out from high speed steel filings of grinding, also comprise the emery wheel ash after the de-oiling is carried out broken step;
(2) magneticly elect the emery wheel particle: utilize half adverse current type magnetic separator to carrying out magnetic separation through the emery wheel ash after step (1) de-oiling and the fragmentation; Wherein said half adverse current type magnetic separator adopts rare-earth Nd-Fe-B and Ferrite Material as magnetic to be; Magnet drum magnetic is 120 ° of cornerites; Magnet drum surface maximum field 100 mT magneticly elect the emery wheel abrasive particle; Emery wheel ash staple after the magnetic separation is a steel cuttings, because its density is smaller, and very loose, therefore also comprise the emery wheel ash after the magnetic separation is carried out the agglomerating step.
(3) melting: the emery wheel ash behind step (2) process magnetic separation and the sintering is put into intermediate frequency furnace smelt, obtain high-speed tool steel.
Embodiment 2:
A kind of method that from the emery wheel ash, reclaims high-speed tool steel may further comprise the steps:
(1) emery wheel ash de-oiling: at first the emery wheel ash is placed in the heating tank; The control furnace temp is about 100 ℃; Insulation 1.5h, emery wheel ash drying becomes loose powder, carries out the de-oiling operation then; Join in the rinse bath after emery wheel ash and clean-out system mixed, after the stirring through after 3 rinsings with the emery wheel ash drying of de-oiling; Remove the emery wheel particle and other impurity that still contain in the smeary emery wheel ash about 10%,, make high speed steel filings of grinding and emery wheel particle sintering together owing in the process of grinding, can produce a large amount of grinding heats.For the emery wheel abrasive particle is sorted out from high speed steel filings of grinding, also comprise the emery wheel ash after the de-oiling is carried out broken step;
(2) magneticly elect the emery wheel particle: utilize half adverse current type magnetic separator to carrying out magnetic separation through the emery wheel ash after step (1) de-oiling and the fragmentation; Wherein said half adverse current type magnetic separator adopts rare-earth Nd-Fe-B and Ferrite Material as magnetic to be; Magnet drum magnetic is 128 ° of cornerites; Magnet drum surface maximum field 300 mT magneticly elect the emery wheel abrasive particle; Emery wheel ash staple after the magnetic separation is a steel cuttings, because its density is smaller, and very loose, therefore also comprise the emery wheel ash after the magnetic separation is carried out the agglomerating step.
(3) melting: the emery wheel ash behind step (2) process magnetic separation and the sintering is put into intermediate frequency furnace smelt, obtain high-speed tool steel.
Embodiment 3:
A kind of method that from the emery wheel ash, reclaims high-speed tool steel may further comprise the steps:
(1) emery wheel ash de-oiling: at first the emery wheel ash is placed in the heating tank; The control furnace temp is about 120 ℃; Insulation 2.0h, emery wheel ash drying becomes loose powder, carries out the de-oiling operation then; Join in the rinse bath after emery wheel ash and clean-out system mixed, after the stirring through after 4 rinsings with the emery wheel ash drying of de-oiling; Remove the emery wheel particle and other impurity that still contain in the smeary emery wheel ash about 10%,, make high speed steel filings of grinding and emery wheel particle sintering together owing in the process of grinding, can produce a large amount of grinding heats.For the emery wheel abrasive particle is sorted out from high speed steel filings of grinding, also comprise the emery wheel ash after the de-oiling is carried out broken step;
(2) magneticly elect the emery wheel particle: utilize half adverse current type magnetic separator to carrying out magnetic separation through the emery wheel ash after step (1) de-oiling and the fragmentation; Wherein said half adverse current type magnetic separator adopts rare-earth Nd-Fe-B and Ferrite Material as magnetic to be; Magnet drum magnetic is 135 ° of cornerites; Magnet drum surface maximum field 500 mT magneticly elect the emery wheel abrasive particle; Emery wheel ash staple after the magnetic separation is a steel cuttings, because its density is smaller, and very loose, therefore also comprise the emery wheel ash after the magnetic separation is carried out the agglomerating step.
(3) melting: the emery wheel ash behind step (2) process magnetic separation and the sintering is put into intermediate frequency furnace smelt, obtain high-speed tool steel.
Be most preferred embodiment wherein with embodiment 2.Wherein, be that 200 purpose emery wheels ash is example for granularity, through one roughing, the fine fodder grade reaches more than 75%, and the tailings grade is reduced to below 5%, and the steel cuttings recovery is more than 90%.And for the production line of 2000 tons of high-speed tool steel emery wheels ashes of year processing, but 100 tons of 1100 tons of high-speed tool steels of output regeneration in every year, 800 tons of abrasive particles of regeneration, regeneration MO, overall economic efficiency can reach 15,000,000 yuan.
And 1 ton of emery wheel ash of every processing, separablely go out at least 0.4 ton of abrasive particle, as the abrasive particle raw material of grinding wheel factory, smelt link and form waste residue and flue dust thereby avoid it to get into.Compare with ordinary method, but the present invention's energy efficient significantly reduces smoke discharge amount in the smelting process more than 30%, has reduced energy consumption, had higher social ecological benefits.
The foregoing description does not limit the present invention in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drop in protection scope of the present invention.
Claims (3)
1. a method that from the emery wheel ash, reclaims high-speed tool steel is characterized in that, may further comprise the steps:
(1) emery wheel ash de-oiling: at first the emery wheel ash is placed in the heating tank; The control furnace temp is about 100-150 ℃; Insulation 1.5-2.5h; Emery wheel ash drying becomes loose powder; Carry out the de-oiling operation then; Will emery wheel ash join in the rinse bath after mixing with cleaning agent, after the stirring through after 3-5 the rinsing with the grey drying of the emery wheel of de-oiling;
(2) magneticly elect the emery wheel particle: utilize half adverse current type magnetic separator to carrying out magnetic separation through the emery wheel ash after step (1) de-oiling; Wherein said half adverse current type magnetic separator adopts rare-earth Nd-Fe-B and Ferrite Material as magnetic to be; Magnet drum magnetic is cornerite 120-135 °; Magnet drum surface maximum field 100-500 mT magneticly elects the emery wheel abrasive particle;
(3) melting: step (2) is put into intermediate frequency furnace through the emery wheel ash after the magnetic separation smelt, obtain high-speed tool steel.
2. a kind of method that from the emery wheel ash, reclaims high-speed tool steel according to claim 1 is characterized in that, before the step of carrying out the described magnetic separation of step (2), also comprises the emery wheel ash after the de-oiling is carried out broken step.
3. a kind of method that from the emery wheel ash, reclaims high-speed tool steel according to claim 1 is characterized in that, before the step of carrying out the described melting of step (3), also comprises the emery wheel ash after the magnetic separation is carried out the agglomerating step.
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| CN2012101772433A CN102703681A (en) | 2012-06-01 | 2012-06-01 | Method for recovering high-speed tool steel from grinding wheel ash |
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| CN2012101772433A CN102703681A (en) | 2012-06-01 | 2012-06-01 | Method for recovering high-speed tool steel from grinding wheel ash |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230922A (en) * | 2013-04-15 | 2013-08-07 | 河北钢铁股份有限公司邯郸分公司 | Fibrous roller abrasive dust recycling method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1119217A (en) * | 1995-04-12 | 1996-03-27 | 重庆大学 | Regeneration smelting process for oxide skin of high-speed tool steel |
| CN1465730A (en) * | 2002-06-03 | 2004-01-07 | 孙恒怀 | Method for producing high speed tool steel |
| CN101906541A (en) * | 2010-07-15 | 2010-12-08 | 河北上大再生资源科技有限公司 | Method for comprehensively utilizing nickel alloy slag |
| CN102094120A (en) * | 2011-03-16 | 2011-06-15 | 湖南江滨机器（集团）有限责任公司 | Process for recovering aluminum scraps |
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2012
- 2012-06-01 CN CN2012101772433A patent/CN102703681A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1119217A (en) * | 1995-04-12 | 1996-03-27 | 重庆大学 | Regeneration smelting process for oxide skin of high-speed tool steel |
| CN1465730A (en) * | 2002-06-03 | 2004-01-07 | 孙恒怀 | Method for producing high speed tool steel |
| CN101906541A (en) * | 2010-07-15 | 2010-12-08 | 河北上大再生资源科技有限公司 | Method for comprehensively utilizing nickel alloy slag |
| CN102094120A (en) * | 2011-03-16 | 2011-06-15 | 湖南江滨机器（集团）有限责任公司 | Process for recovering aluminum scraps |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230922A (en) * | 2013-04-15 | 2013-08-07 | 河北钢铁股份有限公司邯郸分公司 | Fibrous roller abrasive dust recycling method |
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Application publication date: 20121003 |