CN104986767B - Carbon removing apparatus and method for silicon carbide micropowder - Google Patents
Carbon removing apparatus and method for silicon carbide micropowder Download PDFInfo
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- CN104986767B CN104986767B CN201510298536.0A CN201510298536A CN104986767B CN 104986767 B CN104986767 B CN 104986767B CN 201510298536 A CN201510298536 A CN 201510298536A CN 104986767 B CN104986767 B CN 104986767B
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Abstract
The invention discloses a carbon removing apparatus and method for silicon carbide micropowder. The objective of the invention is to overcome the technical problems of wasting of resources and high production cost caused by high SiC content of a waste carbon material and great material loss in conventional carbon removing technology for silicon carbide micropowder. The apparatus comprises a carbon removing pool, an air-blowing device, an adsorption device and a collection device. The method comprises the following procedures: slurry making; air blowing; carbon removal through adherency; and discharging. The carbon removing apparatus and method have good carbon removal effect and high carbon removal efficiency and can substantially reducing SiC content of the waste carbon material and great material loss and increasing the utilization rate of resources, thereby improving production efficiency and reducting production cost; and the silicon carbide micropowder treated in the invention has free carbon content of less than 0.15% and can completely meet technical indexes of a crystal silicon slice cutting edge material.
Description
Technical field
The present invention relates to silicon carbide micro-powder production technical field, and in particular to a kind of silicon carbide micro-powder powder carbon removing device and side
Method.
Background technology
The features such as carborundum has high rigidity, low-expansion coefficient, stable chemical nature, is widely used in ceramic seal
The fields such as part, mill are situated between, crystal silicon chip cutting.With the progress of science and technology, to the purity requirement of silicon carbide micro-powder also more and more higher,
Wherein free carbon is one of major impurity of impact silicon carbide micro-powder purity.If free carbon in silicon carbide micropowder impurity is more,
Carborundum sintered article can be made to produce speckle flower, Hua Yin, while affecting the prescriptions such as the density of product；It is applied to cutting for crystal silicon chip
Cut and can produce silicon chip surface stain and the low problem of cutting efficiency during generation.
At present in the production process of silicon carbide micro-powder, the main free carbon removed using floatation in silicon carbide micro-powder,
Floating agent is typically added in silicon carbide slurry, gas is blasted, is made with hydrophobic carbon granule floating on liquid level, then
Struck off with scraper plate.Due to silicon carbide micro-powder grain graininess it is thinner（About 5～13 μm）, carbon, the useless carbon of generation are removed using floatation
SiC content is higher in material（40～50%）So that silicon carbide micro-powder removes material during carbon and damages larger.To improve carbonization silicon resource
Utilization rate, reduces production cost, needs a kind of new silicon carbide micro-powder decarburizing device and method, is carrying out silicon carbide micro-powder except carbon
During purification, the SiC content in useless carbon material is reduced.
The content of the invention
Present invention seek to address that existing silicon carbide micro-powder is except SiC content is higher in the carbon material that gives up present in carbon technique, material
The high technical problem of the larger wasting of resources for causing of damage, production cost.
To solve above-mentioned technical problem, the present invention is adopted the following technical scheme that：
A kind of silicon carbide micro-powder decarburizing device is designed, including except carbon pond, aerating apparatus, adsorption plant and collecting device,
The adsorption plant include being arranged at the roller support except carbon pond one end top side wall, be horizontally installed in it is described
Cylindrical roller on roller support, and the driving machine for being connected with the roller and providing rotational power for the roller
Structure, the bottom side of the roller be located at it is described except the inside and outside side in carbon pond be located at it is described in addition to the end sidewalls of carbon pond；
The collecting device includes scraper plate and the carbon collecting box being installed in the end sidewalls except carbon pond, the scraper plate
One side is tangent with the lateral surface of the roller, another side is extended at the upper opening of the carbon collecting box；
The aerating apparatus include being arranged at the gas transmission that the gas distribution pipe except carbon bottom of pond portion is connected with the gas distribution pipe
Pipe, the air inlet of the appendix extend to it is described except carbon pond outside, air pump is connected with the air inlet, in the gas transmission
Intake valve is additionally provided with pipe, on the side wall of the gas distribution pipe qi-emitting hole is provided with；Described except the side lower sidewall in carbon pond
It is provided with discharge gate.
Preferably, the gas distribution pipe is placed equidistant in described except carbon bottom of pond portion, and parallel with the roller, is removed from described
The other end in carbon pond is near one end of the roller, the aperture of the qi-emitting hole on adjacent gas distribution pipe is sequentially reduced, qi-emitting hole
Quantity increases successively.
Preferably, the aperture of the qi-emitting hole on the gas distribution pipe of described roller one end is 1～3mm；Away from the roller
The aperture of the qi-emitting hole on the gas distribution pipe of one end is 8～10mm.
Preferably, the surfacing of the roller is oleophilic oil material.
Preferably, the oleophilic oil material is the metal material after etched and fluorination treatment with hydrophobic oleophilic oil,
Or the polypropylene with hydrophobic oleophilic oil, polyurethane or fluorocarbon resin macromolecular material.
Silicon carbide micro-powder of the present invention removes carbon method, comprises the following steps：
（1）Pulping：Pending silicon carbide micro-powder and deionized water are carried out mixing pulping, concentration is obtained for 40～50%
Slurry, the carbon collecting agent of 1～3L is added into slip per ton, and stir after 10～15min, the slip is incorporated into into right will
Ask silicon carbide micro-powder decarburizing device described in 1 except in carbon pond；
（2）Air-blowing：Start aerating apparatus, to carrying out air-blowing except the slurry in carbon pond, the carbon collecting agent and carbon in slurry
Grain floats with gas and is enriched in pulp surface；
（3）Adhesion removes carbon：Start adsorption plant, drive mechanism drives roller to rotate, and the carbon of pulp surface enrichment is sticked to
Roller surface, scraper plate scrapes in the carbon that roller surface is adhered to, into carbon collecting box；
（4）Blowing：After the carbon enrichment layer of pulp surface is all removed, close aerating apparatus and adsorption plant, slurry by
Discharge gate is released, and is completed except carbon operation.
Preferably, step（1）The carbon collecting agent of middle addition is terpineol, kerosene, diesel oil, dithiocarbonic acids sodium, Oleic acid, phenol
At least one in sour mixed fatty alcohol, silicone glass hydrophober, isomery ethanol.
The beneficial effects of the present invention is：
1. the present invention utilizes adhesiveness of the oleophilic oil material to oiliness carbon collecting agent, is reached by the adhesion to carbon collecting agent
To except carbon purpose, the SiC content in useless carbon material can be effectively reduced；Overcome in prior art and carbon is removed using floatation, due to
Silicon-carbide particle is less, and foam is larger to the encapsulation of silicon-carbide particle, and causes SiC content height, material in useless carbon material to damage big
Problem；The present invention carries out that, except carbon, the SiC content in useless carbon material can be significantly reduced by adherent fashion, improves the utilization of resources
Rate, reduction material are damaged, and then improve production efficiency, reduction production cost.
2. the present invention is except carbon effect is good, efficiency high, and the free carbon in silicon carbide micropowder content after the present invention is processed is little
In 0.15%, the technical specification of crystal silicon wafer cutting edge material can be fully met；The present invention is removed and only use during carbon carbon collecting agent,
Foaming agent is not added with, cost is cheaper compared with floatation.
Description of the drawings
Fig. 1 is the structural representation of silicon carbide micro-powder decarburizing device of the present invention；
Fig. 2 is the structural representation of gas distribution pipe；
Wherein 1 is except carbon pond；2 is roller support；3 is roller；4 is drive mechanism；5 is scraper plate；6 is carbon collecting box；7 are
Gas distribution pipe；8th, 9 is appendix；10 is air inlet；11 is qi-emitting hole；12 is discharge gate.
Specific embodiment
With reference to the accompanying drawings and examples illustrating the specific embodiment of the present invention, but following examples are used only in detail
Describe the bright present invention in detail, and limit the scope of the present invention never in any form.
Embodiment 1：A kind of silicon carbide micro-powder decarburizing device, referring to Fig. 1, Fig. 2, including except carbon pond 1, aerating apparatus, absorption
Equipment and collecting device, adsorption plant includes being arranged at roller support 2 except one end top side wall of carbon pond 1, is horizontally installed in roller
Cylindrical roller 3 on tube stent 2, and the drive mechanism 4 for being connected with roller 3 and providing rotational power for roller 3, should
Drive mechanism 4 is motor；The bottom side of roller 3 is located at except the inside and outside side in carbon pond 1 is located in addition to the end sidewalls of carbon pond 1.
Collecting device includes being installed on scraper plate 5 and carbon collecting box 6 in the end sidewalls except carbon pond 1, one side of scraper plate 5 with
The lateral surface of roller 3 is tangent, another side is extended at the upper opening of carbon collecting box 6.
Aerating apparatus include being arranged at the appendix 8,9 being connected with gas distribution pipe 7 except the gas distribution pipe 7 of the bottom of carbon pond 1, defeated
The air inlet 10 of trachea 9 is extended to except outside carbon pond 1, at air inlet 10 air pump being connected with, be additionally provided with appendix 9 into
Air valve, on the side wall of gas distribution pipe 7 qi-emitting hole 11 is provided with；Discharge gate 12 is provided with the side lower sidewall except carbon pond 1.Gas distribution pipe
7 are placed equidistant in except the bottom of carbon pond 1 and parallel with roller 3, from the other end except carbon pond 1 near one end of roller 3, phase
The aperture of the qi-emitting hole on adjacent gas distribution pipe is sequentially reduced, the quantity of qi-emitting hole increases successively；Wherein, near the cloth of the one end of roller 3
The aperture of the qi-emitting hole on trachea 7 is 1～3mm；Away from the qi-emitting hole on the gas distribution pipe 7 of the one end of roller 3 aperture be 8～
10mm.The surfacing of roller 3 is oleophilic oil material, and it can have after etched and fluorination treatment to change oleophilic oil material
The metal material of hydrophobic oleophilic oil, or the macromolecule material such as the polypropylene with hydrophobic oleophilic oil, polyurethane or fluorocarbon resin
Material.
Embodiment 2：A kind of silicon carbide micro-powder removes carbon method, comprises the following steps：
（1）Pulping：Add deionized water to be configured to the slurry that solid content is 40% 0.5 ton of silicon carbide micro-powder, add
500mL carbon collecting agents, stir 5min, after slurry is uniform, pump into silicon carbide micro-powder decarburizing device in embodiment 1 except in carbon pond；
Wherein：Carbon collecting agent is kerosene, and after testing, the content of free carbon in silicon carbide micropowder is 0.46%, silicon carbide micro-powder
9.8 μm of mean particle size.
（2）Air-blowing：Intake valve is opened, air-blowing 2min is carried out to slurry, make carbon collecting agent and carbon granule in slurry in gas
Under the drive of bubble, in pulp surface enrichment.
（3）Adhesion removes carbon：Start adsorption plant, drive mechanism drives roller to rotate, and the carbon of pulp surface enrichment is sticked to
Roller surface, scraper plate scrapes in the carbon that roller surface is adhered to, into carbon collecting box.
（4）Blowing：After the carbon enrichment layer of pulp surface is all removed, close aerating apparatus and adsorption plant, slurry by
Discharge gate is released, and is completed except carbon operation.
After testing, the content of the free carbon in silicon carbide micropowder after above-mentioned carbon removal treatment is 0.13%.
Embodiment 3：A kind of silicon carbide micro-powder removes carbon method, comprises the following steps：
（1）Pulping：Add deionized water to be configured to the slurry that solid content is 40% 0.5 ton of silicon carbide micro-powder, add
1000mL carbon collecting agents, stir 10min, after slurry is uniform, pump into silicon carbide micro-powder decarburizing device in embodiment 1 except carbon pond
It is interior；
Wherein：Carbon collecting agent is terpineol, and after testing, the content of free carbon in silicon carbide micropowder is 0.53%, and carborundum is micro-
10.3 μm of powder particles mean diameter.
（2）Air-blowing：Intake valve is opened, air-blowing 5min is carried out to slurry, make carbon collecting agent and carbon granule in slurry in gas
Under the drive of bubble, in pulp surface enrichment.
（3）Adhesion removes carbon：Start adsorption plant, drive mechanism drives roller to rotate, and the carbon of pulp surface enrichment is sticked to
Roller surface, scraper plate scrapes in the carbon that roller surface is adhered to, into carbon collecting box.
（4）Blowing：After the carbon enrichment layer of pulp surface is all removed, close aerating apparatus and adsorption plant, slurry by
Discharge gate is released, and is completed except carbon operation.
After testing, the content of the free carbon in silicon carbide micropowder after above-mentioned carbon removal treatment is 0.09%.
In the embodiment above involved instrument and equipment if no special instructions, is routine instrument device；Involved
The raw material of industry if no special instructions, is commercially available regular industrial raw material.
The present invention is described in detail above in conjunction with drawings and Examples, but, those of skill in the art
Member to the design parameter of each in above-described embodiment it is understood that on the premise of without departing from present inventive concept, can also carry out
Change, forms multiple specific embodiments, is the common excursion of the present invention, and here is no longer described in detail one by one.
Claims (4)
1. a kind of silicon carbide micro-powder decarburizing device, it is characterised in that include except carbon pond, aerating apparatus, adsorption plant and collection set
It is standby,
The adsorption plant includes being arranged at the roller support for removing carbon pond one end top side wall, is horizontally installed in the roller
Cylindrical roller on support, and the drive mechanism for being connected with the roller and providing rotational power for the roller, institute
State roller bottom side be located at it is described except the inside and outside side in carbon pond be located at it is described in addition to the end sidewalls of carbon pond；
The collecting device includes scraper plate and the carbon collecting box being installed in the end sidewalls except carbon pond, the one of the scraper plate
While, another side tangent with the lateral surface of the roller is extended at the upper opening of the carbon collecting box；
The aerating apparatus include being arranged at the appendix that the gas distribution pipe except carbon bottom of pond portion is connected with the gas distribution pipe,
The air inlet of the appendix is removed outside carbon pond described in extending to, and air pump is connected with the air inlet, in the appendix
On be additionally provided with intake valve, be provided with qi-emitting hole on the side wall of the gas distribution pipe；Set in the side lower sidewall except carbon pond
There is discharge gate；
The gas distribution pipe is placed equidistant in described except carbon bottom of pond portion, and parallel with the roller, from described another except carbon pond
Hold near one end of the roller, the aperture of the qi-emitting hole on adjacent gas distribution pipe is sequentially reduced, the quantity of qi-emitting hole increases successively
It is many；
The aperture of the qi-emitting hole on the gas distribution pipe of described roller one end is 1～3mm；Away from the gas distribution pipe of described roller one end
On qi-emitting hole aperture be 8～10mm.
2. silicon carbide micro-powder decarburizing device according to claim 1, it is characterised in that the surfacing of the roller is thin
Water lipophilic material.
3. silicon carbide micro-powder decarburizing device according to claim 2, it is characterised in that the oleophilic oil material is that Jing is carved
Erosion and fluorination treatment after have hydrophobic oleophilic oil metal material, or the polypropylene with hydrophobic oleophilic oil, polyurethane or
Fluorocarbon resin macromolecular material.
4. a kind of silicon carbide micro-powder removes carbon method, it is characterised in that comprise the following steps：
（1）Pulping：Pending silicon carbide micro-powder and deionized water are carried out mixing pulping, the slurry that concentration is 40～50% is obtained
Material, the carbon collecting agent of 1～3L is added into slip per ton, and is stirred after 10～15min, and the slip is incorporated into into claim 1
The silicon carbide micro-powder decarburizing device except in carbon pond；
The carbon collecting agent for wherein adding is terpineol, kerosene, diesel oil, dithiocarbonic acids sodium, Oleic acid, phenolic acid mixed fatty alcohol, has
At least one in machine silica glass hydrophober, isomery ethanol；
（2）Air-blowing：Start aerating apparatus, to carrying out air-blowing except the slurry in carbon pond, the carbon collecting agent and carbon granule in slurry with
Gas floats and is enriched in pulp surface；
（3）Adhesion removes carbon：Start adsorption plant, drive mechanism drives roller to rotate, and the carbon of pulp surface enrichment sticks to roller
Surface, scraper plate scrapes in the carbon that roller surface is adhered to, into carbon collecting box；
（4）Blowing：After the carbon enrichment layer of pulp surface is all removed, aerating apparatus and adsorption plant are closed, slurry is by discharge
Mouth is released, and is completed except carbon operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510298536.0A CN104986767B (en) | 2015-06-03 | 2015-06-03 | Carbon removing apparatus and method for silicon carbide micropowder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510298536.0A CN104986767B (en) | 2015-06-03 | 2015-06-03 | Carbon removing apparatus and method for silicon carbide micropowder |
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| CN104986767A CN104986767A (en) | 2015-10-21 |
| CN104986767B true CN104986767B (en) | 2017-04-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106365168A (en) * | 2016-08-31 | 2017-02-01 | 平顶山易成新材料有限公司 | Method for purifying carbon materials in silicon carbide |
| CN107876213A (en) * | 2017-10-24 | 2018-04-06 | 广西力合城市矿产再生资源科技有限公司 | Slag method for removing iron |
| CN108249441B (en) * | 2018-03-22 | 2019-12-27 | 江苏南京白马现代农业高新技术产业园有限公司 | A simply remove carbon device for carborundum miropowder |
| CN112827662B (en) * | 2020-12-30 | 2022-04-22 | 佛山市星光磨料磨具科技有限公司 | Processing method for improving purity of silicon carbide |
| CN116200946A (en) * | 2023-03-06 | 2023-06-02 | 安徽隆润高分子材料有限公司 | Low-temperature-resistant rubber coating cloth and preparation method thereof |
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