CN102167956B - 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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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 refer to a kind of recovery and reuse method to 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 the 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 of polishing powder from rare earth consumption and country to the exploitation of rare earth mineral products protection of resources, polishing powder from rare earth is becoming tight supply day on the one hand; On the other hand, the polishing powder from rare earth waste residue that forms in the use procedure and waste liquid are also in continuous increase.
The polishing powder from rare earth waste residue mainly be adhere to the block waste material that progressively condenses at each position of polissoir and recycle in the screen overflow that filters out, the liquid waste that contains the some amount polishing powder from rare earth that sticks to polishing fluid on glass after waste liquid refers to polish and in the cleaning polishing product, form.In polishing powder from rare earth waste residue and the waste liquid except 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 with simple method regeneration, cause the waste of rare earth resources.
At present some are all arranged to the report of polishing powder from rare earth regeneration both at home and abroad, such 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 processing is still undesirable.Domestic patent " renovation process of fail rare earth polishing powder " 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 filter progress, 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 of fluorochemical and the problem of contaminate environment, so be not widely applied so far.Most enterprises is still at present to be processed the polishing powder from rare earth waste residue and liquid as common waste residue and waste water, not only cause the waste of valuable rare earth resources, but also causes certain environmental pollution.
Summary of the invention
Process the deficiency of polishing powder from rare earth waste residue and the existence of waste liquid technology for existing chemical recovering method, the present invention does not need to use the fluorochemicals such as hydrogen fluoride, do not need to process through high-temperature roasting yet, a kind of method of removing impurity in the polishing powder from rare earth waste residue and liquid with physical method is provided, has realized the recovery and reuse of polishing powder from rare earth waste residue and liquid.The present invention has less investment, cost recovery is low, technical process is simple, the recovery utilization rate high.
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 for the first time removal of impurities of one of following method of employing acquisition:
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 turns high speed dispersion after 30 minutes-150 minutes through per minute 3000-5000, takes out 20 orders-320 order vibratory screening apparatus; Polishing powder waste liquid after for the first 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, get the polishing powder waste liquid after for the first time removal of impurities;
B) the polishing powder waste liquid after for the first time removal of impurities is poured in the whizzer, and turning-1500 speed that turn with per minute 500 carries out centrifugation, after upper strata suspension is separated, gets the useless polishing powder sediment after for the second time removal of impurities;
C) the useless polishing powder sediment after for the second time removal of impurities carries out press filtration and processes under 0.8MPa-1.5MPa pressure, the useless polishing powder clod after for the third time removal of impurities;
D) the useless polishing powder clod after for the third time removal of impurities is packed into high speed dispersor, add simultaneously the water with useless polishing powder clod equal in quality, turn high speed dispersion after 10 minutes-60 minutes through per minute 1000-3000, cross 300 orders-400 order vibratory screening apparatus, get the concentrated rumbling compound after the removal of impurities the 4th time;
E) should concentrate the rumbling compound thin up, the weight percentage that is adjusted to rare earth oxide is 15%-20%, gets the rare earth rumbling compound finished product of recovery.
The present invention also provides the recycling method of a kind of polishing powder from rare earth waste residue and waste liquid, 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 rare earth.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, turn high speed dispersion after 30 minutes-150 minutes through per minute 3000-5000, took out 20 orders-320 order vibratory screening apparatus, the thicker impurity such as cullet in the polishing powder from rare earth waste residue, mill skin are separated.The polishing powder from rare earth waste liquid is direct mistake 20 orders-320 order vibratory screening apparatus then, 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 larger between polishing powder from rare earth and the glass powder (approximately 6.5 g/ccs of the density of polishing powder from rare earth, approximately 2.5 g/ccs of the density of glass powder), turn-1500 speed that turn with per minute 500 and carry out centrifugation, the large 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 again packing into, add simultaneously an amount of water, turn-3000 through per minute 1000 and turn 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%, namely 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 the fluorochemicals such as hydrogen fluoride, does not need to process through high-temperature roasting yet, and technique 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 rare earth, and the rate of recovery is high.
3, with polishing efficiency and 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 turns, high speed dispersion 1 hour.Took out and crossed respectively 20 orders, 150 orders and 320 order vibratory screening apparatuss.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 turns.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 is recycled.With this clod high speed dispersor of packing into, the water of adding and clod identical weight turns 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 is 15% again, namely 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 respectively 60 orders and 300 order vibratory screening apparatuss, 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 turns.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 is recycled.With this clod high speed dispersor of packing into, the water of adding and clod identical weight turns 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 is 20% again, namely makes to can be used for the precise polished rare earth rumbling compound of glass.
Claims (2)
1. the recovery method of a polishing powder from rare earth waste residue and waste liquid is characterized in that, concrete steps are:
A) the polishing powder waste liquid after for the first time removal of impurities of one of following method of employing acquisition:
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 turns high speed dispersion after 30 minutes-150 minutes through per minute 3000-5000, takes out 20 orders-320 order vibratory screening apparatus; Polishing powder waste liquid after for the first 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, get the polishing powder waste liquid after for the first time removal of impurities;
B) the polishing powder waste liquid after for the first time removal of impurities is poured in the whizzer, and turning-1500 speed that turn with per minute 500 carries out centrifugation, after upper strata suspension is separated, gets the useless polishing powder sediment after for the second time removal of impurities;
C) the useless polishing powder sediment after for the second time removal of impurities carries out press filtration and processes under 0.8MPa-1.5MPa pressure, the useless polishing powder clod after for the third time removal of impurities;
D) the useless polishing powder clod after for the third time removal of impurities is packed into high speed dispersor, add simultaneously the water with useless polishing powder clod equal in quality, turn high speed dispersion after 10 minutes-60 minutes through per minute 1000-3000, cross 300 orders-400 order vibratory screening apparatus, get the concentrated rumbling compound after the removal of impurities the 4th time;
E) should concentrate the rumbling compound thin up, the weight percentage that is adjusted to rare earth oxide is 15%-20%, gets the rare earth rumbling compound finished product of recovery.
2. the recycling method of a rare earth rumbling compound that makes according to claim 1 method is characterized in that, this rare earth rumbling compound is directly used in the precise polished of glass.
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN103305697B (en) * | 2013-06-13 | 2015-02-25 | 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 |
| CN103978434B (en) * | 2014-05-07 | 2016-03-16 | 连云港健发磁性材料有限公司 | A kind of devices and methods therefor realizing rare earth polishing slurries and recycle online |
| 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 |
| CN106348406B (en) * | 2016-08-25 | 2019-07-02 | 清远纳福娜陶瓷有限公司 | A kind of polishing slag recoverying and utilizing method and used equipment |
| 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 |
| CN114381206B (en) * | 2022-01-07 | 2023-04-14 | 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 |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1456624A (en) * | 2003-03-10 | 2003-11-19 | 田汝梅 | Fail rare earth polishing powder reproducing method |
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| JP4248937B2 (en) * | 2002-06-07 | 2009-04-02 | 昭和電工株式会社 | Method for recovering rare earth oxide from waste liquid containing rare earth element |
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| CN1456624A (en) * | 2003-03-10 | 2003-11-19 | 田汝梅 | Fail rare earth polishing powder reproducing method |
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| JP特开2004-175652A 2004.06.24 |
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