CN105129801B - Recycle and reuse method of by-product from production of silicon carbide - Google Patents
Recycle and reuse method of by-product from production of silicon carbide Download PDFInfo
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- CN105129801B CN105129801B CN201510418245.0A CN201510418245A CN105129801B CN 105129801 B CN105129801 B CN 105129801B CN 201510418245 A CN201510418245 A CN 201510418245A CN 105129801 B CN105129801 B CN 105129801B
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- silicon carbide
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Abstract
The invention discloses a recycle and reuse method of a by-product from production of silicon carbide and aims to solve the technical problem that by-products in production of silicon carbide in the prior art are aggregated, which causes environment pollution and resource waste. The method includes following steps: 1) preparation of slurry; (2) impurity removal; (3) primary classification; (4) secondary classification; and (5) third classification. The recycle and reuse method can effectively classify by-products during a production process of silicon carbide micro powder, can avoid the problems that aggregated by-product cannot be treated well, which causes environment pollution and resource waste. The method achieves recycle of resources, increases utilization rate of resources and improves workshop environment, and achieves great environmental benefit.
Description
Technical field
The present invention relates to silicon carbide micro-powder production technical field, and in particular to the recovery of byproduct in a kind of carborundum production
Application way.
Background technology
Silicon carbide micro-powder is widely used in silicon chip cutting industry as a kind of solar energy crystal silicon wafer cutting edge material.Right
After 1000# is with thin grading in silicon carbide micro-powder, lower floor's coarse fodder can be assembled in byproduct form, and the aggregation of these coarse fodders is not only
The environment of workshop can be affected, and the waste of resource can be caused.And then deposit for these coarse fodders carry out further classification
In many problems, it is difficult to be embodied as in actual production.In carborundum production process, the stage division of product can be divided into
Moisture divides with dry.Because the silicon carbide products granularity of 800#, 360#, 240# is big, sinking speed is fast in moisture process, and used is heavy
The drop time is short, so as to be difficult each thick grading；And dry point-score then has that partition size concentration degree is poor, product quality not
The shortcomings of high and big loss.
The content of the invention
Present invention seek to address that byproduct aggregation at present carborundum production, environmental pollution, the wasting of resources are easily caused
Technical problem, there is provided a kind of method for processing byproduct in carborundum production efficiently, quick, practical, to reach raising resource
Utilization rate and the purpose of reduction environmental pollution.
To solve above-mentioned technical problem, the present invention is adopted the following technical scheme that：
A kind of recoverying and utilizing method of byproduct in carborundum production is designed, is comprised the following steps：
（1）Pulping：Silicon carbide products of the granularity more than 1000# are placed in pulping pond, are added water and is stirred, obtain carbon
SiClx micro mist mass percent is 20～40% slurry；
（2）Removal of impurities：The slurry being well mixed is carried out except iron first by magnetic separator, flotation is then carried out except carbon, is removed
Iron tramp and carbon impurity in slurry, the content for making iron tramp and carbon impurity in micro mist after removal of impurities is respectively less than 0.15%；
（3）Scalping：By step（2）The slurry of gained is squeezed in grading pool, and addition accounts for stock quality 0.5～0.7 ‰
Dispersant, natural subsidence 30min～40min after stirring, classification obtains the silicon carbide products of 800#；
（4）Secondary grading：To step（3）The dispersant for accounting for its quality 0.8～1.0 ‰, stirring are added in the slurry of gained
Natural subsidence 20min～30min after uniform, classification obtains the silicon carbide products of 360#；
（5）Three classifications：To step（4）The dispersant for accounting for its quality 1～1.3 ‰ is added in the slurry of gained, stirring is equal
Even rear natural subsidence 20min～25min, classification obtains the silicon carbide products of 240#.
Preferably, step（3）、（4）、（5）Described in dispersant be polyethyleneimine, marine polysaccharide, polyethylene glycol, hydroxyl first
At least one in base sodium cellulosate.Wherein, the molecular weight of the polyethylene glycol is 600～1000.It is further preferred that step
（3）、（4）、（5）Described in dispersant be polyethyleneimine.
Preferably, in step（3）Before being classified, first the pH value of slurry is adjusted to into 7～8.
Preferably, step（3）、（4）、（5）Described in hierarchical approaches be automatic siphon hydraulic classiciation.
The beneficial effects of the present invention is：
1. add dispersant in carborundum byproduct classification process, extend the sedimentation time of silicon carbide micro-powder, improve
The product quality and product concentration degree of classification crude product, increased production benefit；Add the difference of the amount of dispersant successively,
Correspondence is classified out the silicon carbide products of different model, solves that sinking speed in crude product classification process is fast, sedimentation time short-range missile
The problem of the crude product classification hardly possible of cause.
2. the inventive method can be effectively classified to the byproduct in silicon carbide micro-powder production process, can be avoided
Byproduct assembles the problem that cannot deal carefully with and cause environmental pollution and the wasting of resources, realizes the recycling of resource, both
The utilization rate of resource can be improved, while can also improve workshop condition, possesses larger environmental benefit.
Specific embodiment
The specific embodiment of the present invention is illustrated with reference to embodiment, but following examples are used only to describe in detail
The present invention, and the scope of the present invention is limited never in any form.
Embodiment 1：The recoverying and utilizing method of byproduct, comprises the following steps in a kind of carborundum production：
（1）Pulping：Silicon carbide products of the granularity more than 1000# are placed in pulping pond, are added water and is stirred, obtain carbon
SiClx micro mist mass percent is 30% slurry；
（2）Removal of impurities：The slurry being well mixed is carried out except iron first by magnetic separator, then carries out, except carbon, removing slurry
In iron tramp and carbon impurity；Then the pH value of slurry is adjusted to into 7～8；
（3）Scalping：By step（2）The slurry of gained is squeezed in grading pool, and addition accounts for the poly- second of stock quality 0.5 ‰
Alkene imines, natural subsidence 30min, classification obtains the silicon carbide products of 800#；
（4）Secondary grading：To step（3）Addition in gained slip accounts for the polyethyleneimine of its quality 0.9 ‰, natural subsidence
25min, classification obtains the silicon carbide products of 360#；
（5）Three classifications：To step（4）Addition in gained slip accounts for the polyethyleneimine of its quality 1.2 ‰, natural subsidence
25min, classification obtains the silicon carbide products of 240#；
Step（3）、（4）、（5）Described in hierarchical approaches be automatic siphon hydraulic classiciation.
Embodiment 2：The recoverying and utilizing method of byproduct in a kind of carborundum production, be with the difference of embodiment 1,
Step（3）, add the polyethyleneimine and marine polysaccharide mixture for accounting for stock quality 0.6 ‰, natural subsidence
25min, classification obtains the silicon carbide products of 800#；
Step（4）, add the polyethyleneimine and marine polysaccharide mixture for accounting for stock quality 0.8 ‰, natural subsidence
25min, classification obtains the silicon carbide products of 360#；
Step（5）, add the polyethyleneimine and marine polysaccharide mixture for accounting for stock quality 1.0 ‰, natural subsidence
25min, classification obtains the silicon carbide products of 240#.
Embodiment 3：The recoverying and utilizing method of byproduct in a kind of carborundum production, be with the difference of embodiment 1,
Step（1）In, silicon carbide micro-powder mass percent is 20% in slurry；
Step（3）, add the polyethylene glycol for accounting for stock quality 0.7 ‰, natural subsidence 30min, classification obtains the carbon of 800#
SiClx product；
Step（4）, add the polyethylene glycol for accounting for stock quality 0.8 ‰, natural subsidence 25min, classification obtains the carbon of 360#
SiClx product；
Step（5）, add the polyethylene glycol for accounting for stock quality 1.1 ‰, natural subsidence 20min, classification obtains the carbon of 240#
SiClx product；
The molecular weight of polyethylene glycol used is 600～1000.
In the embodiment above involved equipment and method of operating if no special instructions, are conventional equipment and and operation
Method；The involved raw material of industry if no special instructions, is commercially available regular industrial raw material.
The performance test results that the silicon carbide micro-powder of each model for obtaining is reclaimed using the inventive method are as shown in table 1 below：
The silicon carbide products of 800#, 360#, 240# can be preferably classified using the method for the present invention, the product matter for obtaining
Amount is preferable, and yield rate is more than 86.5%, and granularity reaches standard requirement, and concentration degree is higher, while being conducive to environmental protection and section
About resource.
The present invention is described in detail above in conjunction with embodiment, but, person of ordinary skill in the field can
Understand, on the premise of without departing from present inventive concept, the design parameter of each in above-described embodiment can also be changed, shape
Into multiple specific embodiments, the common excursion of the present invention is, here is no longer described in detail one by one.
Claims (4)
1. the recoverying and utilizing method of byproduct during a kind of carborundum is produced, it is characterised in that comprise the following steps：
（1）Pulping：Silicon carbide products of the granularity more than 1000# are placed in pulping pond, are added water and is stirred, obtain carborundum
Micro mist mass percent is 20～40% slurry；
（2）Removal of impurities：The slurry being well mixed is carried out except iron first by magnetic separator, flotation is then carried out except carbon, slurry is removed
In iron tramp and carbon impurity, the content for making iron tramp and carbon impurity in micro mist after removal of impurities is respectively less than 0.15%；
（3）Scalping：By step（2）The slurry of gained is squeezed in grading pool, and addition accounts for dividing for stock quality 0.5～0.7 ‰
Powder, natural subsidence 30min～40min after stirring, classification obtains the silicon carbide products of 800#；
（4）Secondary grading：To step（3）The dispersant for accounting for its quality 0.8～1.0 ‰ is added in the slurry of gained, is stirred
Afterwards natural subsidence 20min～30min, is classified the silicon carbide products for obtaining 360#；
（5）Three classifications：To step（4）The dispersant for accounting for its quality 1～1.3 ‰ is added in the slurry of gained, after stirring
Natural subsidence 20min～25min, classification obtains the silicon carbide products of 240#；
Step（3）、（4）、（5）Described in dispersant be polyethyleneimine, marine polysaccharide, polyethylene glycol, sodium cellulose glycolate
In at least one；
Step（3）、（4）、（5）Described in hierarchical approaches be automatic siphon hydraulic classiciation.
2. the recoverying and utilizing method of byproduct during carborundum according to claim 1 is produced, it is characterised in that the poly- second
The molecular weight of glycol is 600～1000.
3. the recoverying and utilizing method of byproduct during carborundum according to claim 1 is produced, it is characterised in that step（3）、
（4）、（5）Described in dispersant be polyethyleneimine.
4. the recoverying and utilizing method of byproduct during carborundum according to claim 1 is produced, it is characterised in that in step
（3）Before being classified, first the pH value of slurry is adjusted to into 7～8.
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| CN201510418245.0A CN105129801B (en) | 2015-07-16 | 2015-07-16 | Recycle and reuse method of by-product from production of silicon carbide |
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| CN201510418245.0A CN105129801B (en) | 2015-07-16 | 2015-07-16 | Recycle and reuse method of by-product from production of silicon carbide |
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| CN106542827B (en) * | 2016-10-31 | 2019-02-01 | 河南易成新能源股份有限公司 | The environment-friendly preparation method thereof of silicon carbide ceramics powder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1951574A (en) * | 2005-10-21 | 2007-04-25 | 夏玉策 | Method for preparing fine powder of silicon carbide |
| RU2359905C1 (en) * | 2008-05-19 | 2009-06-27 | Государственное образовательное учреждение высшего профессионального образования "Сибирский государственный индустриальный университет" | Method of charge receiving for manufacturing of silicon-carbide ceramics by means of solid-phase sintering |
| CN101475172A (en) * | 2008-01-03 | 2009-07-08 | 江源碳化硅微粉有限责任公司 | Recycling, purifying and classifying technology for high purity superfine silicon carbide micro powder |
| CN102120576A (en) * | 2011-01-25 | 2011-07-13 | 西安通鑫半导体辅料有限公司 | Method for recycling silicon carbide micropowder from waste mortar produced by cutting silicon wafer |
| CN102951641A (en) * | 2012-11-01 | 2013-03-06 | 临沭山田研磨材有限公司 | Water-saving and environmental protection-type preparation method of silicon carbide micro-powder for silicon wafer wire cutting |
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- 2015-07-16 CN CN201510418245.0A patent/CN105129801B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1951574A (en) * | 2005-10-21 | 2007-04-25 | 夏玉策 | Method for preparing fine powder of silicon carbide |
| CN101475172A (en) * | 2008-01-03 | 2009-07-08 | 江源碳化硅微粉有限责任公司 | Recycling, purifying and classifying technology for high purity superfine silicon carbide micro powder |
| RU2359905C1 (en) * | 2008-05-19 | 2009-06-27 | Государственное образовательное учреждение высшего профессионального образования "Сибирский государственный индустриальный университет" | Method of charge receiving for manufacturing of silicon-carbide ceramics by means of solid-phase sintering |
| CN102120576A (en) * | 2011-01-25 | 2011-07-13 | 西安通鑫半导体辅料有限公司 | Method for recycling silicon carbide micropowder from waste mortar produced by cutting silicon wafer |
| CN102951641A (en) * | 2012-11-01 | 2013-03-06 | 临沭山田研磨材有限公司 | Water-saving and environmental protection-type preparation method of silicon carbide micro-powder for silicon wafer wire cutting |
Non-Patent Citations (1)
| Title |
|---|
| 分散剂对纳米碳化硅粉末在水中分散的影响;罗永明等;《第十一届全国高新技术陶瓷学术年会论文集 》;20011208;349-351页 * |
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