CN102424385B - Apparatus and method for removing free carbon in carbonized silicon micropowder - Google Patents
Apparatus and method for removing free carbon in carbonized silicon micropowder Download PDFInfo
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- CN102424385B CN102424385B CN 201110265309 CN201110265309A CN102424385B CN 102424385 B CN102424385 B CN 102424385B CN 201110265309 CN201110265309 CN 201110265309 CN 201110265309 A CN201110265309 A CN 201110265309A CN 102424385 B CN102424385 B CN 102424385B
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- slip
- stirred vessel
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- silicon carbide
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Abstract
The invention relates to an apparatus and method for removing free carbon in carbonized silicon micropowder. The apparatus comprises a stirring container, a stirring mechanism matchingly arranged in the stirring container, a scraper plate, an air blowing mechanism and a driving mechanism; the stirring mechanism is composed of a hollow rotating shaft and a hollow agitator arm/oar connected with the lower end of the hollow rotating shaft, the cavity of the hollow rotating shaft communicates with the cavity of the agitator arm/oar to form a waterway channel communicating with a water source, and the agitator arm/oar is provided with a water distributing opening; the air blowing mechanism comprises an air transmission pipe and an air distributing pipe, and the air distributing pipe is provided with an air distributing opening; the upper edge of the stirring container is provided with an overflow groove opening, and the scraper plate is arranged on the hollow rotating shaft and corresponds to the overflow groove opening. The apparatus has a simple structure, is easy to manufacture and is simple to utilize and maintain; when the apparatus is used for purifying carbonized silicon micropowder, carbon and impurities are removed thoroughly, and the advantages of high efficiency and labor and time conservation are achieved, for example, it only needs two to three hours to thoroughly remove carbon in a moderate quantity of silicon carbide slurry.
Description
Technical field
The present invention relates to a kind of separating device and method, be specifically related to a kind of free carbon in silicon carbide micropowder clearing device and utilize this device to remove the method for free carbon in silicon carbide micropowder.
Background technology
Silicon carbide has very high hardness, chemical stability and certain toughness, be widely used in making bonded abrasive tool, coated abrasive tool and freely grind, to be used for processed glass, pottery, stone material, cast iron and some non-ferrous metal, Wimet, titanium alloy, speedy steel cutting-tool and emery wheel etc.Progress along with science and technology, the silicon carbide micro-powder Application Areas is increasing, demand is in rapid increase, and purity requirement is also more and more higher, especially in the widespread use of the frontiers such as the cutting polishing of solar cell, super large silicon wafer, electronics stopping composition, military affairs, pottery, ultrapure, ultra-fine, the grain type is good, the smart expensive goods of grain group at home and abroad supply falls short of demand lasting for years.
At present, remove this link of uncombined carbon in silicon carbide micro-powder purification field, the method that generally adopts is: by the method for manually washing carbon the uncombined carbon in the silicon carbide micro-powder is separated.But because ordinary method is processed not thoroughly washing carbocyclic ring joint, still have the existence of a large amount of uncombined carbons in the silicon carbide classification and in the operation after the classification, cause the quality product of production defective, thereby seriously influence the physicals of product, and traditional time-consuming, effort of carbon technique of manually washing, the production production capacity is had a great impact, a large amount of human and material resources have been wasted again, therefore based on above factor, need a kind of manpower uncombined carbon few, that save the production time that drop into to remove equipment and method and come uncombined carbon in the purification processes silicon carbide micro-powder.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of device structure simply and the free carbon in silicon carbide micropowder clearing device of easy handling, and provide the free carbon in silicon carbide micropowder that matches removing method, the method is simple, and is thorough to the removing of free carbon in silicon carbide micropowder and impurity (greasy dirt etc.), efficient is high and saving of work and time.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of free carbon in silicon carbide micropowder clearing device, the stirred vessel, stirring mechanism, scraper plate, air-blowing mechanism and the driving mechanism that comprise vertical setting, described stirring mechanism is arranged in the described stirred vessel matchingly, this stirring mechanism is made of the agitator arm/oar of the hollow that hollow rotating shaft and lower end thereof connect, the cavity of described hollow rotating shaft is connected with the cavity of its agitator arm/oar and consists of waterway channel, the upper end of this hollow rotating shaft cavity is communicated with the water source, is provided with the water distribution mouth that is communicated with waterway channel at described agitator arm/oar; Described air-blowing mechanism comprises the induction pipe that connects high-pressure air source and is arranged at gas distribution pipe in the described stirred vessel lower cavity that described gas distribution pipe is provided with the cloth gas port; The upper of described stirred vessel offers overflow notch along the position, and described scraper plate one end is installed on the described hollow rotating shaft, and its installation site is corresponding to described overflow notch.
In the bottom of described stirred vessel or the sidewall that is close to the bottom be provided with discharge valve.
Described gas distribution pipe is arranged at the below of described agitator arm/oar.
A kind of free carbon in silicon carbide micropowder removing method may further comprise the steps:
(1) will be through the overpickling deironing, be washed to neutral silicon carbide micro-powder slip, regulating pulp density, to make the ratio of water and material be 2～3:1, pumps in the stirred vessel of the described free carbon in silicon carbide micropowder clearing device of claim 1;
(2) add dispersion agent 150～170ml/ ton slip in the slip in the stirred vessel, open air valve, pass into 〉=3.5 atmospheric air-flows in stirred vessel via described air-blowing mechanism, constantly turn over cylinder, and start stirring mechanism and stir, so that uncombined carbon shifts to the superiors of slip, by rotating scraper plate, the uncombined carbon on slip upper strata is scraped to stirred vessel through overflow notch, make it flow into the carbon collecting tank, continual carrying out like this is until the uncombined carbon removing is complete;
(3) the slip Free Carbon skim clean complete after, in slip, add liquid detergent 70～90ml/ ton slip, to remove residual oil in the slip;
(4) after the waterway channel of stirring mechanism is filled with water in the stirred vessel, continue to add water with 150～300L/ hour flow again, drift out slip top layer oil, uncombined carbon and impurity to wash;
(5) wash float complete after, qualified slip is pumped into or puts into circulating pool or pumps into down production process one.
In described step (2), used dispersion agent is at least a in flower bulb alkali, HPMA, the polyethylene wax.
The present invention has actively useful effect:
Clearing device of the present invention simple in structure, be easy to make, safeguard, using method is simple, is suitable for aborning large-scale application.
2. the inventive method is simple, removing to carbon and impurity is thorough, efficient is high and saving of work and time, needed thoroughly to remove in 2～3 hours such as general of silicon carbide slurry de-carbon to a collection of moderate quatity, generally need 5～6 hours and manually drag for carbon (removing carbon), and product purity is difficult to be guaranteed; And the inventive method can shorten the production time of finished silicon carbide product greatly, alleviates workman's labour intensity, has increased the production capacity of intrinsic equipment, greatly improves the productivity effect of silicon carbide products.
Description of drawings
Fig. 1 is a kind of cross-sectional view of free carbon in silicon carbide micropowder clearing device;
Fig. 2 is the vertical view of Fig. 1.
Among the figure, 1 is stirred vessel, and 2 is agitator arm, and 3,8 is gas distribution pipe, and 4 is hollow rotating shaft, and 5 is drive-motor, and 6 is overflow notch, and 7 is support, and 9 is induction pipe, and 10 is discharge valve, and 11 is scraper plate.
Embodiment
Further set forth the present invention below in conjunction with specific embodiment.Method among the following embodiment or step if no special instructions, are ordinary method or step; Raw materials used and reagent is commercially available without special instruction.
1 one kinds of free carbon in silicon carbide micropowder clearing devices of embodiment, the barrel-shaped stirred vessel 1(upper port Ф 3200mm that comprises vertical setting, lower port Ф 2800mm, high 1200mm), stirring mechanism, scraper plate 11, air-blowing mechanism and drive-motor 5, described stirring mechanism is arranged in the stirred vessel 1 matchingly, this stirring mechanism is made of the agitator arm 2 of four hollows that hollow rotating shaft 4 and lower end thereof connect, the cavity of hollow rotating shaft 4 is connected with the cavity of its agitator arm 2 and consists of waterway channel, the upper end of this hollow rotating shaft cavity 4 is communicated with the water source, is provided with the water distribution mouth that is communicated with waterway channel at agitator arm 2; Described air-blowing mechanism comprises the induction pipe 9 that connects high-pressure air source and is arranged at gas distribution pipe 3,8 in the described stirred vessel lower cavity that gas distribution pipe 3,8 is provided with the cloth gas port; The upper overflow notch 6 that offers some amount along the position of stirred vessel 1, scraper plate 11 1 ends are installed on the hollow rotating shaft 4, and its installation site is corresponding to overflow notch 6.The sidewall that is close to the bottom at stirred vessel 4 is provided with discharge valve 10.
Utilize said apparatus to remove the method for free carbon in silicon carbide micropowder, may further comprise the steps:
(1) will be through the overpickling deironing, be washed to neutral silicon carbide micro-powder slip, the ratio of water and material is 2.5:1 in the slip, pumps in the stirred vessel of above-mentioned free carbon in silicon carbide micropowder clearing device;
(2) add dispersion agent (flower bulb alkali) 400ml in the slip in the stirred vessel, open air valve, pass into 〉=3.5 atmospheric air-flows in stirred vessel 1 via described air-blowing mechanism, constantly turn over cylinder, and start stirring mechanism and stir, so that uncombined carbon shifts to the superiors of silicon carbide slurry, by rotating scraper plate 11, the uncombined carbon on slip upper strata is scraped to stirred vessel through overflow notch 6, make it flow into the carbon collecting tank, continual carrying out like this is until the uncombined carbon removing is complete;
(3) the slip Free Carbon skim clean complete after, in slip, add liquid detergent 200ml, to remove residual oil in the slip;
(4) after the waterway channel of stirring mechanism was filled with water in the stirred vessel 1, the flow with 200～300L/H continued to add water again, drifts out slip top layer oil, uncombined carbon and impurity to wash;
(5) wash float complete after, open discharge valve 10, with qualified slip (SiC 〉=98.5%, Fe
2O
3≤ 0.2%, FC≤0.2%) puts into circulating pool or pump into down production process one.
Change each the concrete parameter in above-described embodiment, perhaps be equal to replacement, can form a plurality of specific embodiments, be common variation range of the present invention, describe in detail no longer one by one at this.
Claims (5)
1. free carbon in silicon carbide micropowder clearing device, it is characterized in that, the stirred vessel, stirring mechanism, scraper plate, air-blowing mechanism and the driving mechanism that comprise vertical setting, described stirring mechanism is arranged in the described stirred vessel matchingly, this stirring mechanism is made of the agitator arm/oar of the hollow that hollow rotating shaft and lower end thereof connect, the cavity of described hollow rotating shaft is connected with the cavity of its agitator arm/oar and consists of waterway channel, the upper end of this hollow rotating shaft cavity is communicated with the water source, is provided with the water distribution mouth that is communicated with waterway channel at described agitator arm/oar; Described air-blowing mechanism comprises the induction pipe that connects high-pressure air source and is arranged at gas distribution pipe in the described stirred vessel lower cavity that described gas distribution pipe is provided with the cloth gas port; The upper of described stirred vessel offers overflow notch along the position, and described scraper plate one end is installed on the described hollow rotating shaft, and its installation site is corresponding to described overflow notch.
2. free carbon in silicon carbide micropowder clearing device according to claim 1 is characterized in that, in the bottom of described stirred vessel or the sidewall that is close to the bottom be provided with discharge valve.
3. free carbon in silicon carbide micropowder clearing device according to claim 1 is characterized in that, described gas distribution pipe is arranged at the below of described agitator arm/oar.
4. free carbon in silicon carbide micropowder removing method may further comprise the steps:
(1) will be through the overpickling deironing, be washed to neutral silicon carbide micro-powder slip, regulating pulp density, to make the ratio of water and material be 2～3:1, pumps in the stirred vessel of the described free carbon in silicon carbide micropowder clearing device of claim 1;
(2) add dispersion agent 150～170ml/ ton slip in the slip in the stirred vessel, open air valve, pass into 〉=3.5 atmospheric air-flows in stirred vessel via described air-blowing mechanism, constantly turn over cylinder, and start stirring mechanism and stir, so that uncombined carbon shifts to the superiors of slip, by rotating scraper plate, the uncombined carbon on slip upper strata is scraped to stirred vessel through overflow notch, make it flow into the carbon collecting tank, continual carrying out like this is until the uncombined carbon removing is complete;
(3) the slip Free Carbon skim clean complete after, in slip, add liquid detergent 70～90ml/ ton slip, to remove residual oil in the slip;
(4) after the waterway channel of stirring mechanism is filled with water in the stirred vessel, continue to add water with 150～300L/ hour flow again, drift out slip top layer oil, uncombined carbon and impurity to wash;
(5) wash float complete after, qualified slip is pumped into or puts into circulating pool or pumps into down production process one.
5. free carbon in silicon carbide micropowder removing method according to claim 4 is characterized in that, in described step (2), used dispersion agent is at least a in flower bulb alkali, HPMA, the polyethylene wax.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110265309 CN102424385B (en) | 2011-09-08 | 2011-09-08 | Apparatus and method for removing free carbon in carbonized silicon micropowder |
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| CN 201110265309 CN102424385B (en) | 2011-09-08 | 2011-09-08 | Apparatus and method for removing free carbon in carbonized silicon micropowder |
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| CN102424385A CN102424385A (en) | 2012-04-25 |
| CN102424385B true CN102424385B (en) | 2013-03-13 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008093B (en) * | 2012-12-05 | 2014-12-17 | 平顶山易成新材料有限公司 | Method for separating free carbon from ultra-fine silicon carbide powder |
| CN103523782B (en) * | 2013-10-14 | 2016-06-08 | 河南易成新能源股份有限公司 | Silicon carbide dissolved air flotation purifying plant and method |
| CN104437822A (en) * | 2014-11-27 | 2015-03-25 | 河南新大新材料股份有限公司 | C-SiC micro powder separating method |
| CN104399575A (en) * | 2014-12-02 | 2015-03-11 | 长沙石立超硬材料有限公司 | Diamond washing device and application method thereof |
| CN104874489A (en) * | 2015-05-21 | 2015-09-02 | 许昌皓邦新能源科技有限公司 | Carbon removal device for silicon carbide |
| CN104986767B (en) * | 2015-06-03 | 2017-04-12 | 河南易成新能源股份有限公司 | Carbon removing apparatus and method for silicon carbide micropowder |
| CN107285318A (en) * | 2017-07-25 | 2017-10-24 | 安徽正丰再生资源有限公司 | A kind of silicon carbide micro-powder de_ironing refinement device |
| CN109530078B (en) * | 2018-10-23 | 2020-07-28 | 宁波工程学院 | Device for separating hydrophilic and hydrophobic particles by utilizing water surface vibration |
Citations (3)
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|---|---|---|---|---|
| CN101613105A (en) * | 2009-07-13 | 2009-12-30 | 平顶山煤业（集团）易成碳化硅制品有限公司 | Remove the method for uncombined carbon in a kind of silicon carbide micro-powder |
| CN101804982A (en) * | 2010-04-15 | 2010-08-18 | 连云港东渡碳化硅有限公司 | Purification method of silicon carbide superfine micropowder |
| CN202214225U (en) * | 2011-09-08 | 2012-05-09 | 新疆新路标光伏材料有限公司 | Device for removing free carbon in silicon carbide micropowder |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101613105A (en) * | 2009-07-13 | 2009-12-30 | 平顶山煤业（集团）易成碳化硅制品有限公司 | Remove the method for uncombined carbon in a kind of silicon carbide micro-powder |
| CN101804982A (en) * | 2010-04-15 | 2010-08-18 | 连云港东渡碳化硅有限公司 | Purification method of silicon carbide superfine micropowder |
| CN202214225U (en) * | 2011-09-08 | 2012-05-09 | 新疆新路标光伏材料有限公司 | Device for removing free carbon in silicon carbide micropowder |
Non-Patent Citations (2)
| Title |
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| 富碳纳米SiC 粉末的氧化除碳;谢华清等;《材料科学与工艺》;20001231;第8卷(第4期);第63-65页 * |
| 谢华清等.富碳纳米SiC 粉末的氧化除碳.《材料科学与工艺》.2000,第8卷(第4期),第63-65页. |
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