CN104986767A - Carbon removing apparatus and method for silicon carbide micropowder - Google Patents
Carbon removing apparatus and method for silicon carbide micropowder Download PDFInfo
- Publication number
- CN104986767A CN104986767A CN201510298536.0A CN201510298536A CN104986767A CN 104986767 A CN104986767 A CN 104986767A CN 201510298536 A CN201510298536 A CN 201510298536A CN 104986767 A CN104986767 A CN 104986767A
- Authority
- CN
- China
- Prior art keywords
- carbon
- silicon carbide
- roller
- pond
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Carbon And Carbon Compounds (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
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, be specifically related to a kind of silicon carbide micro-powder powder carbon removing device and method.
Background technology
Silicon carbide has the features such as high rigidity, low-expansion coefficient, stable chemical nature, is widely used in the field such as ceramic seal, mill Jie, crystal silicon chip cutting.Along with the progress of science and technology, also more and more higher to the purity requirement of silicon carbide micro-powder, its Free Carbon is one of major impurity affecting silicon carbide micro-powder purity.If free carbon in silicon carbide micropowder impurity is more, silicon carbide sintered article can be made to produce spot flower, Hua Yin, affect the specification of quality such as the density of goods simultaneously; Be applied in the cutting production process of crystal silicon chip and can produce silicon chip surface stain and the problem such as cutting efficiency is low.
At present in the production process of silicon carbide micro-powder, the main uncombined carbon adopted in flotation process removal silicon carbide micro-powder, normally adds flotation reagent, blasts gas, make to have hydrophobic carbon granule floating on liquid level, then strike off with scraper plate in silicon carbide slurry.Due to silicon carbide micro-powder grain graininess comparatively thin (being about 5 ~ 13 μm), adopt flotation process de-carbon, SiC content higher (40 ~ 50%) in the useless carbon material of generation, make material in silicon carbide micro-powder de-carbon process damage larger.For improving the utilization ratio of silicon carbide resource, reducing production cost, needing a kind of new silicon carbide micro-powder decarburizing device and method, when carrying out silicon carbide micro-powder de-carbon and purifying, reduce the SiC content in useless carbon material.
Summary of the invention
The present invention is intended to solve existing silicon carbide micro-powder except SiC content in the useless carbon material existed in carbon technique is higher, material damages the wasting of resources caused more greatly, the technical problem that production cost is high.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
Design a kind of silicon carbide micro-powder decarburizing device, comprise de-carbon pond, aerating apparatus, an adsorption device and collecting device,
Described an adsorption device comprises the roller support being arranged at one end, described de-carbon pond top side wall, the cylindrical roller be horizontally installed on described roller support, and to be connected with described roller and to provide the driving mechanism of rotational power for described roller, the bottom side of described roller is positioned at inside and outside side, described de-carbon pond and is positioned at outside the end sidewalls of described de-carbon pond;
Described collecting device comprises scraper plate in the end sidewalls being installed on described de-carbon pond and carbon collection box, and, the other side tangent with the outer side of described roller of described scraper plate extend to the upper opening place of described carbon collection box;
Described aerating apparatus comprises the pneumatic tube being arranged at gas distribution pipe bottom described de-carbon pond, being connected with described gas distribution pipe, the inlet mouth of described pneumatic tube extends to outside, described de-carbon pond, air pump is connected with at described inlet mouth place, described pneumatic tube is also provided with intake valve, the sidewall of described gas distribution pipe is provided with qi-emitting hole; Discharge gate is provided with in the side lower sidewall in described de-carbon pond.
Preferably, described gas distribution pipe is equidistantly arranged at bottom described de-carbon pond, and parallel with described roller, from the other end in described de-carbon pond to the one end near described roller, the aperture of the qi-emitting hole on adjacent gas distribution pipe reduces successively, the quantity of qi-emitting hole increases successively.
Preferably, the aperture of the qi-emitting hole on the gas distribution pipe of described roller one end is 1 ~ 3mm; Aperture away from the qi-emitting hole on the gas distribution pipe of described roller one end is 8 ~ 10mm.
Preferably, the surfacing of described roller is hydrophobic oleophilic oil material.
Preferably, described hydrophobic oleophilic oil material has the metallic substance of hydrophobic oleophilic oil after etching and fluoridation, or have the polypropylene of hydrophobic oleophilic oil, urethane or fluorocarbon resin macromolecular material.
Silicon carbide micro-powder de-carbon method of the present invention, comprises the following steps:
(1) pulping: pending silicon carbide micro-powder and deionized water are carried out mixing pulping, obtain the slurry that concentration is 40 ~ 50%, the carbon collecting agent of 1 ~ 3L is added in slip per ton, and after stirring 10 ~ 15min, this slip is incorporated in the de-carbon pond of silicon carbide micro-powder decarburizing device described in claim 1;
(2) air-blowing: start aerating apparatus, carry out air-blowing to the slurry in de-carbon pond, the carbon collecting agent in slurry and carbon granule float with gas and be enriched in pulp surface;
(3) adhere to de-carbon: start an adsorption device, driving mechanism drives roller to rotate, and the carbon of pulp surface enrichment sticks to roller surface, and the carbon that roller surface adheres to scrapes by scraper plate, enters carbon collection box;
(4) blowing: the carbon enrichment layer of pulp surface is by after full scale clearance, and close aerating apparatus and an adsorption device, slurry is released by discharge gate, completes de-carbon operation.
Preferably, the carbon collecting agent added in step (1) is at least one in Terpineol 350, kerosene, diesel oil, dithiocarbonic acid sodium, oleic acid, phenolic acid mixed fatty alcohol, silicone glass hydrophober, isomery ethanol.
Beneficial effect of the present invention is:
1. the present invention utilizes hydrophobic oleophilic oil material to the adhesivity of oiliness carbon collecting agent, by reaching de-carbon object to the adhesion of carbon collecting agent, effectively can reduce the SiC content in useless carbon material; Overcome in prior art and adopt flotation process de-carbon, because silicon-carbide particle is less, foam is comparatively large to the encapsulation of silicon-carbide particle, and makes the problem that SiC content in useless carbon material is high, material damage is large; The present invention carries out de-carbon by adherent fashion, significantly can reduce the SiC content in useless carbon material, improves resource utilization, reduces material and damage, and then enhance productivity, reduce production cost.
2. de-carbon of the present invention is effective, efficiency is high, and the free carbon in silicon carbide micropowder content after process of the present invention is less than 0.15%, can meet the technical indicator of crystal silicon wafer cutting edge material completely; Only use carbon collecting agent in de-carbon process of the present invention, do not add pore forming material, cost is cheaper compared with flotation process.
Accompanying drawing explanation
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 de-carbon pond; 2 is roller support; 3 is roller; 4 is driving mechanism; 5 is scraper plate; 6 is carbon collection box; 7 is gas distribution pipe; 8,9 is pneumatic tube; 10 is inlet mouth; 11 is qi-emitting hole; 12 is discharge gate.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described, but following examples are only used to describe the present invention in detail, and limit the scope of the invention never in any form.
Embodiment 1: a kind of silicon carbide micro-powder decarburizing device, see Fig. 1, Fig. 2, comprise de-carbon pond 1, aerating apparatus, an adsorption device and collecting device, an adsorption device comprises the roller support 2 being arranged at one end, de-carbon pond 1 top side wall, the cylindrical roller 3 be horizontally installed on roller support 2, and to be connected with roller 3 and to provide the driving mechanism 4 of rotational power for roller 3, this driving mechanism 4 is drive-motor; The bottom side of roller 3 is positioned at inside and outside side, de-carbon pond 1 and is positioned at outside the end sidewalls of de-carbon pond 1.
Collecting device comprises scraper plate 5 in the end sidewalls being installed on de-carbon pond 1 and carbon collection box 6, and, the other side tangent with the outer side of roller 3 of scraper plate 5 extend to the upper opening place of carbon collection box 6.
Aerating apparatus comprises the pneumatic tube 8,9 being arranged at gas distribution pipe 7 bottom de-carbon pond 1, being connected with gas distribution pipe 7, the inlet mouth 10 of pneumatic tube 9 extends to outside, de-carbon pond 1, at inlet mouth 10, place is connected with air pump, pneumatic tube 9 is also provided with intake valve, the sidewall of gas distribution pipe 7 is provided with qi-emitting hole 11; Discharge gate 12 is provided with in the side lower sidewall in de-carbon pond 1.Gas distribution pipe 7 is equidistantly arranged at bottom de-carbon pond 1, and parallels with roller 3, and from the other end in de-carbon pond 1 to the one end near roller 3, the aperture of the qi-emitting hole on adjacent gas distribution pipe reduces successively, the quantity of qi-emitting hole increases successively; Wherein, the aperture of the qi-emitting hole on the gas distribution pipe 7 of roller 3 one end is 1 ~ 3mm; Aperture away from the qi-emitting hole on the gas distribution pipe 7 of roller 3 one end is 8 ~ 10mm.The surfacing of roller 3 is hydrophobic oleophilic oil material, and changing hydrophobic oleophilic oil material can be have the metallic substance of hydrophobic oleophilic oil after etching and fluoridation, or has the macromolecular materials such as the polypropylene of hydrophobic oleophilic oil, urethane or fluorocarbon resin.
Embodiment 2: a kind of silicon carbide micro-powder de-carbon method, comprises the following steps:
(1) pulping: 0.5 ton of silicon carbide micro-powder is added deionized water and is mixed with the slurry that solid content is 40%, then add 500mL carbon collecting agent, stirs 5min, after slurry is even, pumps in the de-carbon pond of silicon carbide micro-powder decarburizing device in embodiment 1;
Wherein: carbon collecting agent is kerosene, after testing, the content of free carbon in silicon carbide micropowder is 0.46%, silicon carbide micro-powder mean particle size 9.8 μm.
(2) air-blowing: open intake valve, carries out air-blowing 2min to slurry, makes carbon collecting agent in slurry and carbon granule under the drive of bubble, in pulp surface enrichment.
(3) adhere to de-carbon: start an adsorption device, driving mechanism drives roller to rotate, and the carbon of pulp surface enrichment sticks to roller surface, and the carbon that roller surface adheres to scrapes by scraper plate, enters carbon collection box.
(4) blowing: the carbon enrichment layer of pulp surface is by after full scale clearance, and close aerating apparatus and an adsorption device, slurry is released by discharge gate, completes de-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 de-carbon method, comprises the following steps:
(1) pulping: 0.5 ton of silicon carbide micro-powder is added deionized water and is mixed with the slurry that solid content is 40%, then add 1000mL carbon collecting agent, stirs 10min, after slurry is even, pumps in the de-carbon pond of silicon carbide micro-powder decarburizing device in embodiment 1;
Wherein: carbon collecting agent is Terpineol 350, after testing, the content of free carbon in silicon carbide micropowder is 0.53%, silicon carbide micro-powder mean particle size 10.3 μm.
(2) air-blowing: open intake valve, carries out air-blowing 5min to slurry, makes carbon collecting agent in slurry and carbon granule under the drive of bubble, in pulp surface enrichment.
(3) adhere to de-carbon: start an adsorption device, driving mechanism drives roller to rotate, and the carbon of pulp surface enrichment sticks to roller surface, and the carbon that roller surface adheres to scrapes by scraper plate, enters carbon collection box.
(4) blowing: the carbon enrichment layer of pulp surface is by after full scale clearance, and close aerating apparatus and an adsorption device, slurry is released by discharge gate, completes de-carbon operation.
After testing, the content of the free carbon in silicon carbide micropowder after above-mentioned carbon removal treatment is 0.09%.
Plant and instrument involved in the embodiment above if no special instructions, is routine instrument device; Involved industrial raw material if no special instructions, is commercially available regular industrial raw material.
In conjunction with the accompanying drawings and embodiments the present invention is described in detail above, but, person of ordinary skill in the field can understand, under the prerequisite not departing from present inventive concept, each design parameter in above-described embodiment can also be changed, form multiple specific embodiment, be common variation range of the present invention, describe in detail no longer one by one at this.
Claims (7)
1. a silicon carbide micro-powder decarburizing device, is characterized in that, comprises de-carbon pond, aerating apparatus, an adsorption device and collecting device,
Described an adsorption device comprises the roller support being arranged at one end, described de-carbon pond top side wall, the cylindrical roller be horizontally installed on described roller support, and to be connected with described roller and to provide the driving mechanism of rotational power for described roller, the bottom side of described roller is positioned at inside and outside side, described de-carbon pond and is positioned at outside the end sidewalls of described de-carbon pond;
Described collecting device comprises scraper plate in the end sidewalls being installed on described de-carbon pond and carbon collection box, and, the other side tangent with the outer side of described roller of described scraper plate extend to the upper opening place of described carbon collection box;
Described aerating apparatus comprises the pneumatic tube being arranged at gas distribution pipe bottom described de-carbon pond, being connected with described gas distribution pipe, the inlet mouth of described pneumatic tube extends to outside, described de-carbon pond, air pump is connected with at described inlet mouth place, described pneumatic tube is also provided with intake valve, the sidewall of described gas distribution pipe is provided with qi-emitting hole;
Discharge gate is provided with in the side lower sidewall in described de-carbon pond.
2. silicon carbide micro-powder decarburizing device according to claim 1, it is characterized in that, described gas distribution pipe is equidistantly arranged at bottom described de-carbon pond, and parallel with described roller, from the other end in described de-carbon pond to the one end near described roller, the aperture of the qi-emitting hole on adjacent gas distribution pipe reduces successively, the quantity of qi-emitting hole increases successively.
3. silicon carbide micro-powder decarburizing device according to claim 2, is characterized in that, the aperture of the qi-emitting hole on the gas distribution pipe of described roller one end is 1 ~ 3mm; Aperture away from the qi-emitting hole on the gas distribution pipe of described roller one end is 8 ~ 10mm.
4. silicon carbide micro-powder decarburizing device according to claim 1, is characterized in that, the surfacing of described roller is hydrophobic oleophilic oil material.
5. silicon carbide micro-powder decarburizing device according to claim 4, it is characterized in that, described hydrophobic oleophilic oil material has the metallic substance of hydrophobic oleophilic oil after etching and fluoridation, or have the polypropylene of hydrophobic oleophilic oil, urethane or fluorocarbon resin macromolecular material.
6. a silicon carbide micro-powder de-carbon method, is characterized in that, comprises the following steps:
(1) pulping: pending silicon carbide micro-powder and deionized water are carried out mixing pulping, obtain the slurry that concentration is 40 ~ 50%, the carbon collecting agent of 1 ~ 3L is added in slip per ton, and after stirring 10 ~ 15min, this slip is incorporated in the de-carbon pond of silicon carbide micro-powder decarburizing device described in claim 1;
(2) air-blowing: start aerating apparatus, carry out air-blowing to the slurry in de-carbon pond, the carbon collecting agent in slurry and carbon granule float with gas and be enriched in pulp surface;
(3) adhere to de-carbon: start an adsorption device, driving mechanism drives roller to rotate, and the carbon of pulp surface enrichment sticks to roller surface, and the carbon that roller surface adheres to scrapes by scraper plate, enters carbon collection box;
(4) blowing: the carbon enrichment layer of pulp surface is by after full scale clearance, and close aerating apparatus and an adsorption device, slurry is released by discharge gate, completes de-carbon operation.
7. silicon carbide micro-powder de-carbon method according to claim 6, it is characterized in that, the carbon collecting agent added in step (1) is at least one in Terpineol 350, kerosene, diesel oil, dithiocarbonic acid sodium, oleic acid, phenolic acid mixed fatty alcohol, silicone glass hydrophober, isomery ethanol.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104986767A true CN104986767A (en) | 2015-10-21 |
| CN104986767B CN104986767B (en) | 2017-04-12 |
Family
ID=54298697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510298536.0A Expired - Fee Related CN104986767B (en) | 2015-06-03 | 2015-06-03 | Carbon removing apparatus and method for silicon carbide micropowder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104986767B (en) |
Cited By (5)
| 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 |
| CN108249441A (en) * | 2018-03-22 | 2018-07-06 | 湖州长鑫电工材料有限公司 | A kind of simple carbon removing device for silicon carbide micro-powder |
| CN112827662A (en) * | 2020-12-30 | 2021-05-25 | 祝红彬 | 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 |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2161721A1 (en) * | 1971-12-13 | 1973-06-14 | Giulini Gmbh Geb | Flotation cell for calcium sulphate dihydrate - with submerged overflow deflector baffle |
| US4377485A (en) * | 1981-09-15 | 1983-03-22 | Lenox Institute For Research, Inc. | Apparatus and method for clarification of water using combined flotation and filtration processes |
| US6395131B1 (en) * | 2000-09-19 | 2002-05-28 | Voith Sulzer Paper Technology North America, Inc. | Flotation machine for a fiber suspension and method of using same |
| US20050174883A1 (en) * | 2002-04-17 | 2005-08-11 | Enersave Fluid Mixers Inc. | Mixing apparatus |
| CN102424385A (en) * | 2011-09-08 | 2012-04-25 | 新疆新路标光伏材料有限公司 | Apparatus and method for removing free carbon in carbonized silicon micropowder |
| CN102765722A (en) * | 2012-08-08 | 2012-11-07 | 铁生年 | Method for recovering and separating silicone and silicon carbide powder through foam flotation in silicon wafer cutting effluent |
| CN203124111U (en) * | 2013-01-31 | 2013-08-14 | 冯愚斌 | Plug flow type flotation boosting rectifying device for cleaning of waste plastics |
| CN203998969U (en) * | 2014-06-26 | 2014-12-10 | 河南新大新材料股份有限公司 | Silicon carbide micro-powder purifying plant |
| CN204824186U (en) * | 2015-06-05 | 2015-12-02 | 河南新大新材料股份有限公司 | Carborundum miropowder removes carbon device |
-
2015
- 2015-06-03 CN CN201510298536.0A patent/CN104986767B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2161721A1 (en) * | 1971-12-13 | 1973-06-14 | Giulini Gmbh Geb | Flotation cell for calcium sulphate dihydrate - with submerged overflow deflector baffle |
| US4377485A (en) * | 1981-09-15 | 1983-03-22 | Lenox Institute For Research, Inc. | Apparatus and method for clarification of water using combined flotation and filtration processes |
| US6395131B1 (en) * | 2000-09-19 | 2002-05-28 | Voith Sulzer Paper Technology North America, Inc. | Flotation machine for a fiber suspension and method of using same |
| US20050174883A1 (en) * | 2002-04-17 | 2005-08-11 | Enersave Fluid Mixers Inc. | Mixing apparatus |
| CN102424385A (en) * | 2011-09-08 | 2012-04-25 | 新疆新路标光伏材料有限公司 | Apparatus and method for removing free carbon in carbonized silicon micropowder |
| CN102765722A (en) * | 2012-08-08 | 2012-11-07 | 铁生年 | Method for recovering and separating silicone and silicon carbide powder through foam flotation in silicon wafer cutting effluent |
| CN203124111U (en) * | 2013-01-31 | 2013-08-14 | 冯愚斌 | Plug flow type flotation boosting rectifying device for cleaning of waste plastics |
| CN203998969U (en) * | 2014-06-26 | 2014-12-10 | 河南新大新材料股份有限公司 | Silicon carbide micro-powder purifying plant |
| CN204824186U (en) * | 2015-06-05 | 2015-12-02 | 河南新大新材料股份有限公司 | Carborundum miropowder removes carbon device |
Cited By (6)
| 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 |
| CN108249441A (en) * | 2018-03-22 | 2018-07-06 | 湖州长鑫电工材料有限公司 | A kind of simple carbon removing device for silicon carbide micro-powder |
| 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 |
| CN112827662A (en) * | 2020-12-30 | 2021-05-25 | 祝红彬 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104986767B (en) | 2017-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104986767A (en) | Carbon removing apparatus and method for silicon carbide micropowder | |
| CN202542904U (en) | Micro flotation water purifier for treating papermaking wastewater | |
| CN103523783B (en) | Device and process for synchronously removing free carbon in silicon carbide micro powder | |
| CN102424385B (en) | Apparatus and method for removing free carbon in carbonized silicon micropowder | |
| CN104310554A (en) | Novel micro-nano bubble flocculation-air floatation process | |
| CN203998969U (en) | Silicon carbide micro-powder purifying plant | |
| CN204193658U (en) | A kind of polysilicon cutting liquid sedimentation device | |
| CN206692364U (en) | A kind of sewage air-flotation separating purifying device | |
| CN106145232A (en) | A kind of dissolved air flotation device for sewage disposal | |
| CN205761808U (en) | Crystal silicon wafer cutting edge material flotation defoaming device | |
| CN107140755A (en) | Sewage purifying and treating device | |
| CN111704188A (en) | Dissolved air flotation removing device and method for micro plastic particles | |
| CN206661419U (en) | Carborundum mixed slurry grading plant | |
| CN115215572A (en) | Preparation method and device of high-efficiency carbonized and modified recycled coarse aggregate | |
| CN113354321B (en) | Method and device for recycling waste slurry water of mixing plant | |
| CN107473309A (en) | A kind of horizontal sewage treatment air flotation machine | |
| CN203513287U (en) | Device for synchronously removing free carbon from silicon carbide micro powder | |
| CN203922787U (en) | A kind of efficient air-floating apparatus | |
| CN204824186U (en) | Carborundum miropowder removes carbon device | |
| CN208032296U (en) | Gas purification tower and exhaust gas purification equipment | |
| CN203170110U (en) | Gas phase-liquid phase-solid phase separation precipitator | |
| CN204107101U (en) | A kind of gas-liquid-solid three-phase separation precipitator | |
| CN206474301U (en) | Silicon carbide micro-powder decarburizing device | |
| CN205603230U (en) | Carborundum pickling removes iron flask | |
| CN202620799U (en) | Intermittent sedimentation tank for papermaking wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Kaifeng City yuwangtai District 475000 Henan Fine Chemical Industry Park Applicant after: HENAN XINDAXIN MATERIALS CO., LTD. Address before: Kaifeng City yuwangtai District 475000 Henan Fine Chemical Industry Park Applicant before: Henan Xindaxin Materials Co., Ltd. |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20180603 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |