CN102167956A - Method for recycling and reutilizing rare-earth polishing powder waste residue and waste liquor - Google Patents
Method for recycling and reutilizing rare-earth polishing powder waste residue and waste liquor Download PDFInfo
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- CN102167956A CN102167956A CN201110053793XA CN201110053793A CN102167956A CN 102167956 A CN102167956 A CN 102167956A CN 201110053793X A CN201110053793X A CN 201110053793XA CN 201110053793 A CN201110053793 A CN 201110053793A CN 102167956 A CN102167956 A CN 102167956A
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Abstract
The invention relates to the technical field of material preparation, particularly provides a method for recycling and reutilizing rare-earth polishing powder waste residue and waste liquor, which is realized in a way that: removing various impurities by carrying out high-speed dispersion, screening, centrifugal settling, pressure filtration, high-speed dispersion and other physical methods on the recycled rare-earth polishing powder waste residue and waste liquor, thereby finally obtaining the rare-earth polishing compound which can be directly used for glass precision polishing, and implementing the reutilization of the rare-earth polishing powder waste residue and waste liquor. By using the method, the recycling rate of rare-earth oxides in the rare-earth polishing powder waste residue and waste liquor is 80-85%, hydrogen fluoride and other fluorides are not need, and high-temperature roasting treatment is also not needed; and thus, the invention has the characteristics of energy saving, environmental protection, less investment, low recycling cost, simple technical process, high reutilization rate and the like.
Description
Technical field
The present invention relates to material preparation technology, further be meant a kind of recovery and reuse method the polishing powder from rare earth waste residue and liquid.
Background technology
Polishing powder from rare earth is widely used in the precise polished of glass devices such as electronic glass, opticglass, ornaments and precision instrument with its unique physics, chemical property and good polishing performance.Along with the increase and the national protective mining to the rare earth Mineral resources of polishing powder from rare earth consumption, polishing powder from rare earth is becoming tight supply day on the one hand; On the other hand, polishing powder from rare earth waste residue that forms in the use and waste liquid are also in continuous increase.
The polishing powder from rare earth waste residue mainly be adhere to each position of polissoir progressively the block waste material of agglomerative and recycle in the screen overflow that filters out, waste liquid is meant the liquid waste material that contains the some amount polishing powder from rare earth that sticks to polishing fluid on glass and form after the polishing in the cleaning polishing product.In polishing powder from rare earth waste residue and the waste liquid except that containing the glass granules that grinding and polishing gets off, also have the foreign material such as mill skin (organic polymer), metal or metal oxide on some glass chip, the polishing machine, thereby make these waste residues and waste liquid cause the waste of rare earth resources with simple method regeneration.
Some reports to the polishing powder from rare earth regeneration are all arranged at present both at home and abroad, as Japanese Patent JP11319F55 the method that employing hydrofluoric acid is removed glass ingredient in the polishing powder is proposed, though this method can effectively be removed the compositions such as silicon in the glass, but grease and other impurity are difficult to remove, and the polishing performance of the rare earth oxide after handling is still undesirable.Domestic patent " renovation process of inefficacy polishing powder from rare earth " also is to add certain density water-soluble alkali and/or soluble fluoride carries out chemical treatment in the slurries of polishing powder from rare earth (ZL03119524.5), after the heated and stirred of certain hour, by sedimentation, cleaning and filtration operation, reclaim solid.The processing of above polishing powder from rare earth all is to adopt the fluoride dissolution glass ingredient to come removal of contamination, complex technical process not only, but also can bring the post-processed and the problem of environment pollution caused of fluorochemical, so do not applied so far.Most of enterprises are still at present the polishing powder from rare earth waste residue and liquid are handled as common waste residue and waste water, not only cause the waste of valuable rare earth resources, but also cause certain environmental pollution.
Summary of the invention
Deficiency at existing chemical method recycling polishing powder from rare earth waste residue and the existence of waste liquid technology, the present invention does not need to use fluorochemicals such as hydrogen fluoride, do not need to handle through high-temperature roasting yet, a kind of method with impurity in the physical method removal polishing powder from rare earth waste residue and liquid is provided, has realized the recovery and reuse of polishing powder from rare earth waste residue and liquid.Characteristics such as the present invention has less investment, cost recovery is low, technical process is simple, recovery utilization rate height.
The recovery method of a kind of polishing powder from rare earth waste residue of the present invention and waste liquid, concrete steps are:
A) the polishing powder waste liquid after one of following method of employing acquisition removal of impurities for the first time:
Method one: the polishing powder from rare earth waste residue that reclaims is placed high speed dispersor, and the water of adding and waste residue equal in quality changes high speed dispersion after 30 minutes-150 minutes through per minute 3000-5000, takes out 20 orders-320 order vibratory screening apparatus; Win polishing powder waste liquid after time removal of impurities;
Method two: with direct mistake 20 orders-320 of the polishing powder from rare earth waste liquid order vibratory screening apparatus that reclaims, the polishing powder waste liquid after time removal of impurities of winning;
B) the polishing powder waste liquid after the removal of impurities is for the first time poured in the whizzer, change-1500 speed of changeing with per minute 500 and carry out centrifugation, after upper strata suspension is separated, the useless polishing powder sediment after the removal of impurities for the second time;
C) the useless polishing powder sediment after the removal of impurities for the second time carries out press filtration and handles under 0.8MPa-1.5MPa pressure, the useless polishing powder clod after the removal of impurities for the third time;
D) the useless polishing powder clod after the removal of impurities is for the third time packed into high speed dispersor, add water simultaneously with useless polishing powder clod equal in quality, change high speed dispersion after 10 minutes-60 minutes through per minute 1000-3000, cross 300 orders-400 order vibratory screening apparatus, the concentrated rumbling compound after the 4th removal of impurities;
E) should concentrate the rumbling compound thin up, the weight percentage that is adjusted to rare earth oxide is 15%-20%, the rare earth rumbling compound finished product that must reclaim.
What the present invention also provided a kind of polishing powder from rare earth waste residue and waste liquid utilizes method again, is specially: the rare earth rumbling compound finished product of above-mentioned recovery is directly used in the precise polished of glass.
The recovery method of polishing powder from rare earth waste residue of the present invention and waste liquid is 80%-85% to the rate of recovery of polishing powder from rare earth waste residue and waste liquid middle-weight rare earths oxide compound.Polishing efficiency and operational characteristic and normal rare earth rumbling compound no significant difference with the rare earth rumbling compound that reclaims the product preparation.
Know-why of the present invention is: the polishing powder from rare earth waste residue that reclaims is put into high speed dispersor, add suitable quantity of water, change high speed dispersion after 30 minutes-150 minutes through per minute 3000-5000, took out 20 orders-320 order vibratory screening apparatus, thicker impurity such as cullet in the polishing powder from rare earth waste residue, mill skin are separated.Then direct mistake 20 orders-320 of polishing powder from rare earth waste liquid order vibratory screening apparatus is to remove thicker impurity component.Polishing powder from rare earth waste liquid behind the removal coarse particles impurity is poured in the whizzer, utilize density difference bigger between polishing powder from rare earth and the glass powder (the about 6.5 gram/cubic centimetres of the density of polishing powder from rare earth, the about 2.5 gram/cubic centimetres of the density of glass powder), change-1500 speed of changeing with per minute 500 and carry out centrifugation, the big preferential sedimentation of density because of polishing powder from rare earth, not only density is little but also particle is also very tiny for the glass impurities that grinding and polishing is got off, and therefore is difficult to sedimentation.After mainly containing the upper strata suspension separation of glass impurities, take out sediment and under 0.8MPa-1.5MPa pressure, carry out the press filtration processing, with further removal small especially particle and soluble impurity.With the polishing powder from rare earth clod that reclaims after the press filtration high speed dispersor of packing into once more, add an amount of water simultaneously, change-3000 through per minute 1000 and change high speed dispersion after 10 minutes-60 minutes, cross 300 orders-400 order vibratory screening apparatus, adding the weight percentage that water is adjusted to rare earth oxide is 15%-20%, promptly makes to can be used for the precise polished rare earth rumbling compound of glass.
Advantage of the present invention is:
1, the recovery method of polishing powder from rare earth waste residue of the present invention and waste liquid does not need to use fluorochemicals such as hydrogen fluoride, does not need to handle through high-temperature roasting yet, and technology is simple, energy-conserving and environment-protective.
2, the recovery method of polishing powder from rare earth waste residue of the present invention and waste liquid is 80%-85% to the rate of recovery of polishing powder from rare earth waste residue and waste liquid middle-weight rare earths oxide compound, rate of recovery height.
3, with polishing efficiency and the operational characteristic and the normal rare earth rumbling compound no significant difference of the rare earth rumbling compound that reclaims the product preparation, can be directly used in the precise polished of glass.
Embodiment
Embodiment 1:
Get 1000 gram rare earth polishing powder waste residues, place high speed dispersor, add 1000 gram water, under the speed that per minute 3000 changes, high speed dispersion 1 hour.Took out and crossed 20 orders, 150 orders and 320 order vibratory screening apparatuss respectively.The polishing powder from rare earth waste liquid that obtains after sieving is poured in the whizzer, carried out centrifugation with the speed that per minute 1000 changes.After the removal of upper strata suspension, take out sediment and under 1MPa pressure, carry out press filtration processing, the polishing powder from rare earth clod that obtains reclaiming.With this clod high speed dispersor of packing into, the water of adding and clod identical weight changes high speed dispersion after 30 minutes through per minute 1500, crosses 400 order vibratory screening apparatuss, adding the weight percentage that water is adjusted to rare earth oxide again is 15%, promptly makes to can be used for the precise polished rare earth rumbling compound of glass.
Embodiment 2:
Get 3000 milliliters of polishing powder from rare earth waste liquids, cross 60 orders and 300 order vibratory screening apparatuss respectively, the polishing powder from rare earth waste liquid that obtains after sieving is poured in the whizzer, carry out centrifugation with the speed that per minute 1500 changes.After the removal of upper strata suspension, take out sediment and under 1.2MPa pressure, carry out press filtration processing, the polishing powder from rare earth clod that obtains reclaiming.With this clod high speed dispersor of packing into, the water of adding and clod identical weight changes high speed dispersion after 15 minutes through per minute 2000 simultaneously, crosses 300 order vibratory screening apparatuss, adding the weight percentage that water is adjusted to rare earth oxide again is 20%, promptly makes to can be used for the precise polished rare earth rumbling compound of glass.
Claims (2)
1. the recovery method of polishing powder from rare earth waste residue and waste liquid is characterized in that concrete steps are:
A) the polishing powder waste liquid after one of following method of employing acquisition removal of impurities for the first time:
Method one: the polishing powder from rare earth waste residue that reclaims is placed high speed dispersor, and the water of adding and waste residue equal in quality changes high speed dispersion after 30 minutes-150 minutes through per minute 3000-5000, takes out 20 orders-320 order vibratory screening apparatus; Win polishing powder waste liquid after time removal of impurities;
Method two: with direct mistake 20 orders-320 of the polishing powder from rare earth waste liquid order vibratory screening apparatus that reclaims, the polishing powder waste liquid after time removal of impurities of winning;
B) the polishing powder waste liquid after the removal of impurities is for the first time poured in the whizzer, change-1500 speed of changeing with per minute 500 and carry out centrifugation, after upper strata suspension is separated, the useless polishing powder sediment after the removal of impurities for the second time;
C) the useless polishing powder sediment after the removal of impurities for the second time carries out press filtration and handles under 0.8MPa-1.5MPa pressure, the useless polishing powder clod after the removal of impurities for the third time;
D) the useless polishing powder clod after the removal of impurities is for the third time packed into high speed dispersor, add water simultaneously with useless polishing powder clod equal in quality, change high speed dispersion after 10 minutes-60 minutes through per minute 1000-3000, cross 300 orders-400 order vibratory screening apparatus, the concentrated rumbling compound after the 4th removal of impurities;
E) should concentrate the rumbling compound thin up, the weight percentage that is adjusted to rare earth oxide is 15%-20%, the rare earth rumbling compound finished product that must reclaim.
A rare earth rumbling compound that makes according to claim 1 method utilize method again, it is characterized in that, this rare earth rumbling compound is directly used in the precise polished of glass.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102886308A (en) * | 2012-10-15 | 2013-01-23 | 内蒙古科技大学 | Method for recycling waste rare-earth polishing powder |
| CN103305697A (en) * | 2013-06-13 | 2013-09-18 | 蓝思科技股份有限公司 | Recovering and reutilizing method of waste residues and waste liquid of rare earth polishing powder |
| CN103571336A (en) * | 2012-07-30 | 2014-02-12 | 张艺兵 | Recycling and utilizing method of waste polishing powder |
| CN103978434A (en) * | 2014-05-07 | 2014-08-13 | 连云港健发磁性材料有限公司 | Device for realizing online cyclic utilization of rare earth polishing stock and method thereof |
| CN104962200A (en) * | 2015-07-23 | 2015-10-07 | 西安西光精细化工有限公司 | Recovery preparation method of waste rare-earth polishing powder |
| CN104692386B (en) * | 2015-02-02 | 2016-08-24 | 东北大学 | Boron carbide the method reused is reclaimed from sapphire rough lapping slug |
| CN106348406A (en) * | 2016-08-25 | 2017-01-25 | 清远纳福娜陶瓷有限公司 | Polishing waste slag recycling method and facility used by method |
| CN113214791A (en) * | 2021-04-30 | 2021-08-06 | 惠晶显示科技（苏州）有限公司 | Method for extracting grinding powder from etching waste and recycling grinding powder |
| CN113842907A (en) * | 2021-11-03 | 2021-12-28 | 长沙蓝思新材料有限公司 | Method for treating waste residue and waste liquid of cerium oxide polishing powder, cerium oxide polishing recovery powder and application thereof |
| CN114381206A (en) * | 2022-01-07 | 2022-04-22 | 甘肃金阳高科技材料有限公司 | Method for preparing rare earth polishing powder by regenerating glass polishing waste residues |
| CN117229040A (en) * | 2023-11-13 | 2023-12-15 | 天津包钢稀土研究院有限责任公司 | Fly ash-based grouting material containing invalid rare earth polishing powder, and preparation method and application thereof |
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| CN1456624A (en) * | 2003-03-10 | 2003-11-19 | 田汝梅 | Fail rare earth polishing powder reproducing method |
| JP2004175652A (en) * | 2002-06-07 | 2004-06-24 | Showa Denko Kk | Method of recovering rare earth oxide from waste liquid containing rare earth element |
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2011
- 2011-03-07 CN CN 201110053793 patent/CN102167956B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004175652A (en) * | 2002-06-07 | 2004-06-24 | Showa Denko Kk | Method of recovering rare earth oxide from waste liquid containing rare earth element |
| CN1456624A (en) * | 2003-03-10 | 2003-11-19 | 田汝梅 | Fail rare earth polishing powder reproducing method |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103571336A (en) * | 2012-07-30 | 2014-02-12 | 张艺兵 | Recycling and utilizing method of waste polishing powder |
| CN103571336B (en) * | 2012-07-30 | 2015-04-29 | 张艺兵 | Recycling and utilizing method of waste polishing powder |
| CN102886308B (en) * | 2012-10-15 | 2013-09-25 | 内蒙古科技大学 | Method for recycling waste rare-earth polishing powder |
| CN102886308A (en) * | 2012-10-15 | 2013-01-23 | 内蒙古科技大学 | Method for recycling waste rare-earth polishing powder |
| CN103305697A (en) * | 2013-06-13 | 2013-09-18 | 蓝思科技股份有限公司 | Recovering and reutilizing method of waste residues and waste liquid of rare earth polishing powder |
| CN103978434A (en) * | 2014-05-07 | 2014-08-13 | 连云港健发磁性材料有限公司 | Device for realizing online cyclic utilization of rare earth polishing stock and method thereof |
| CN104692386B (en) * | 2015-02-02 | 2016-08-24 | 东北大学 | Boron carbide the method reused is reclaimed from sapphire rough lapping slug |
| CN104962200A (en) * | 2015-07-23 | 2015-10-07 | 西安西光精细化工有限公司 | Recovery preparation method of waste rare-earth polishing powder |
| CN106348406A (en) * | 2016-08-25 | 2017-01-25 | 清远纳福娜陶瓷有限公司 | Polishing waste slag recycling method and facility used by method |
| CN113214791A (en) * | 2021-04-30 | 2021-08-06 | 惠晶显示科技（苏州）有限公司 | Method for extracting grinding powder from etching waste and recycling grinding powder |
| CN113842907A (en) * | 2021-11-03 | 2021-12-28 | 长沙蓝思新材料有限公司 | Method for treating waste residue and waste liquid of cerium oxide polishing powder, cerium oxide polishing recovery powder and application thereof |
| CN114381206A (en) * | 2022-01-07 | 2022-04-22 | 甘肃金阳高科技材料有限公司 | Method for preparing rare earth polishing powder by regenerating glass polishing waste residues |
| CN117229040A (en) * | 2023-11-13 | 2023-12-15 | 天津包钢稀土研究院有限责任公司 | Fly ash-based grouting material containing invalid rare earth polishing powder, and preparation method and application thereof |
| CN117229040B (en) * | 2023-11-13 | 2024-01-23 | 天津包钢稀土研究院有限责任公司 | Fly ash-based grouting material containing invalid rare earth polishing powder, and preparation method and application thereof |
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