EP3475232A1 - Verfahren und vorrichtung zur herstellung von mikrohohlglaskugeln - Google Patents
Verfahren und vorrichtung zur herstellung von mikrohohlglaskugelnInfo
- Publication number
- EP3475232A1 EP3475232A1 EP17745970.8A EP17745970A EP3475232A1 EP 3475232 A1 EP3475232 A1 EP 3475232A1 EP 17745970 A EP17745970 A EP 17745970A EP 3475232 A1 EP3475232 A1 EP 3475232A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- glass
- hot gas
- hollow glass
- nozzle plate
- rondier
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/10—Forming beads
- C03B19/107—Forming hollow beads
- C03B19/1075—Forming hollow beads by blowing, pressing, centrifuging, rolling or dripping
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C11/00—Multi-cellular glass ; Porous or hollow glass or glass particles
- C03C11/002—Hollow glass particles
Definitions
- the invention relates to a method and an apparatus for producing hollow glass microspheres in the diameter range of 0.01 mm to 0.1 mm of molten glass, the u. a. can be used as a filler for lightweight materials or as an ingredient of paints, paints and plasters.
- micromassiv glass beads in the diameter range up to 0.015 mm from DE 10 2008 025 767 A1 or DE 197 21 571 A1, according to which molten glass strands are dispersed by means of a cutting wheel.
- WO 2015/1 10621 A1 describes a comparable process for the production of hollow glass spheres.
- very high cutting wheel speeds are required, whereby technical limits are encountered in the cutting wheel bearing (rough running) and cooling (wind formation). Consequently, hollow glass microspheres in the desired diameter range can not be produced by this method.
- DD 261 592 A1 describes a process for the production of micromassive glass spheres in the diameter range from 0.040 mm to 0.080 mm from molten high-index glass.
- the molten glass passes in the form of a glass strand of about 4 mm to 6 mm diameter from a platinum melting tank and is with a cold high-pressure air jet at a speed of 100 ms "1 to 300 ms " 1 and a pressure of 300 kPa to 700 kPa in glass particles atomized.
- the disadvantage is that arise during the sputtering of soda-lime glasses glass fibers instead of the desired glass particles.
- DE 10 2007 002 904 A1 discloses a method for producing hollow glass beads from finely ground soda lime glass and / or borosilicate glass by means of a heat transfer process (for example in a shaft furnace).
- a heat transfer process for example in a shaft furnace.
- the temperature rising in accordance with the method causes glass spheres to form due to the surface tension.
- the high temperature causes the outgassing of an added propellant.
- Disadvantages are the costly crushing of the glass and the lack of control of the hollow ball size, which is why a subsequent classification is required.
- molten glass which runs out of a nozzle as a strand, is dispersed by an intermittently acting jet of hot air into glass particles which assume spherical shape during the subsequent free fall.
- the intermittent jet of hot air is caused by a perforated rotating disc.
- the object of the invention is to provide a method and an apparatus for producing hollow glass microspheres, which make it possible, the hollow glass microspheres in Diameter range from 0.01 mm to 0, 1 mm in a continuous process directly from molten glass to avoid glass fiber formation.
- the scattering width of the diameter of the hollow spheres produced according to the method should be smaller compared to currently known production methods.
- the preparation of the hollow glass microspheres by sputtering a molten glass strand by means of a hot gas to glass particles, wherein the glass particles during a subsequent atomization through a heated Rondier- / expansion channel to Mikroromassivglas- balls balls and subsequently expand this to micro hollow glass spheres.
- the glass is melted with a predetermined composition, wherein the molten glass contains at least one in the range of 1 100 ° C to 1500 ° C gaseous substance in dissolved form.
- the melting device In the bottom region of the melting device there is a discharge opening, through which the glass melt emerges in the form of one or more glass strands.
- a nozzle plate with a plurality of nozzles designed as conical passage openings is arranged on or within the discharge opening, so that a plurality of glass strands spaced apart from one another are produced on exit of the glass melt from the melting apparatus.
- the nozzle plate is preferably heated directly electrically.
- the molten glass strand (s) are atomized to glass particles after leaving the melting device, the resulting glass particles having a more or less irregular shape.
- the hot gas flow is oriented at right angles to the glass strand (s).
- the glass particles are then blown directly into the immediately adjacent, flow-oriented Rondier / Expansi- onskanal.
- the glass particles (ramming) of the glass particles into micromassiv glass spheres takes place, ie, during heating, the glass particles due to the surface tension of spherical shape or transform into spheres.
- the Rondier- / expansion channel is operated by the hot gas and possibly by additional heaters in the temperature range of usually 1 100 ° C to 1500 ° C. After exiting the Rondier- / expansion channel, the hollow glass microspheres are cooled by means of cooling air and collected in solid form.
- One of the advantages of the invention is that the formation of glass threads is avoided by the high gas velocity and the high gas temperature of the hot gas flowing from the high-pressure hot gas nozzle onto the glass strand (s).
- the process makes it possible to produce high-quality hollow glass microspheres inexpensively and in large quantities per unit of time during continuous process control. Expensive process steps, such as the mechanical comminution of cold glass and the costly heating to Rondieren, are unnecessary.
- the glass strands have a diameter of 0.5 mm to 1, 5 mm at the outlet from the melting device.
- the viscosity of the glass melt emerging as glass strand is preferably 0.5 dPa-s to 1.5 dPa s.
- the setting of this viscosity interval can be carried out by controlling the melt temperature at a given chemical composition of the glass melt.
- the glass strand (s) on exiting the reflow apparatus are flown through the hot gas at a gas velocity in the range of 300 ms -1 to 1500 ms -1 , preferably 500 ms -1 to 1000 ms -1 suitably adjusted to a value of between 1500 ° C. and 2000 ° C.
- Lime-soda glasses or borosilicate glasses are preferably used for the process according to the invention
- the glass composition for particularly suitable soda-lime glasses or borosilicate glasses results from the information given in FIG Table 1 .
- Table 1 Preferred composition of the glasses for producing the hollow glass microspheres
- the substance dissolved in the molten glass and gaseous in the range from 1100 ° C. to 1500 ° C. is sulfur trioxide, oxygen, nitrogen, sulfur dioxide, carbon dioxide, arsenic oxide, antimony oxide or a mixture thereof.
- the preferred mass fraction of sulfur trioxide (SO3) is in the range of 0.6% to 0.8%, wherein the sulfur trioxide content can be realized, for example, by admixing sodium sulfate in the glass melt.
- arsenic oxide (AS2O3) or antimony oxide (Sb203) with a mass fraction in the range of 0, 1% to 0.5%.
- the respective mass fraction of the solute is selected as follows:
- a transport gas is introduced axially into the Rondier / expansion channel by means of a transport gas nozzle (a transport burner).
- the flow direction of the transport gas corresponds to the channel direction and the injection takes place below the region in which the glass particles enter the ridge / expansion channel.
- the transport gas serves to suspend the glass particles, the micromassiv glass beads and the hollow glass microspheres during the passage through the Rondier- / expansion channel and to support their transport through the Rondier- / expansion channel.
- the transport gas can be used to heat the Rondier- / expansion channel.
- the device for carrying out the method comprises the melting device with the outlet opening arranged in the bottom area, on or within which the nozzle plate is mounted such that the glass melt can emerge exclusively from the nozzles in thin glass strands.
- the high-pressure hot gas nozzle Immediately below and next to the discharge opening is the high-pressure hot gas nozzle, which is oriented such that, when carrying out the method, the hot gas flowing out of the high-pressure hot gas nozzle impinges on the glass strands (3.1) emerging from the nozzles.
- the Rondier / expansion channel is located in the flow direction of the effluent from the high-pressure hot gas nozzle during operation hot gas behind the discharge opening.
- the device has a cooling air funnel for supplying the cooling air, which adjoins the Rondier- / expansion channel, wherein the cooling air funnel as well as the Rondier / expansion channel are aligned in the flow direction of the hot gas.
- the funnel opening faces the Rondier / expansion channel.
- the funnel neck of the cooling air funnel forms a discharge channel for collecting the cooled hollow glass microspheres.
- the end of the end region of the discharge channel arranged in the flow direction can form a cyclone separator or a rotary valve by means of which the hollow glass microspheres are continuously conveyed out of the discharge channel.
- the nozzle plate has nozzles each with a circular cross-section and with a diameter in the range from 1 mm to 3 mm. This makes it possible to produce the glass strands in the particularly advantageous for the process diameter range of 0.5 mm to 1, 5 mm.
- the spaced-apart nozzles of the nozzle plate are arranged in a line.
- the positioning of the line-shaped nozzle arrangement in the device takes place transversely to the flow direction of the hot gas.
- the nozzle plate can have two symmetrically curved reinforcing beads, which extend in mirror image to one another along the line-shaped arranged nozzles.
- the reinforcing beads restrict the deformation caused by heating or distortions of the nozzle plate; A geometrically precise exit of the glass strands from the nozzles is guaranteed.
- the reinforcing beads may, for example, be formed in sheet metal components of the nozzle plate.
- FIG. 1 shows the device for carrying out the method for producing hollow glass microspheres
- Fig. 2 the nozzle plate with five nozzles in plan view and in cross section.
- soda-lime glass having a sulfur trioxide mass fraction of 0.8% is melted in the melting apparatus 1, an electrically heated platinum melting vessel, at 1450.degree.
- the molten glass 3 passes through the discharge opening 1 .2 in the bottom of the Aufschmelzvorrich- 1 through the electrically heated nozzle plate 2 made of platinum with 20 linearly arranged nozzles 2.1 with a respective diameter of 1, 5 mm from the reflow device. 1
- the viscosity of the molten glass 3 is 0.5 d Pa s.
- the exiting molten glass strands 3.1 with a diameter of 0.7 mm are atomized immediately after leaving the nozzles 2.1 through the hot gas 14 from the high pressure hot gas nozzle 4 of an oxygen / natural gas high pressure burner to glass particles 3.2.
- the hot gas flows at right angles to the glass strands 3.1 with a gas velocity of 600 m / s.
- the glass particles 3.2 arrive in the immediately adjacent, by the transport gas 15 from the Transportgasdüse 5 of a transport gas burner longitudinally heated Rondier ZExpansionskanal 6 made of refractory material.
- the temperature in the Rondier / expansion channel 6 is 1500 ° C.
- this cooling air 7 is blown via the cooling air funnel 8 for cooling the exhaust gases, which at the end of Austragska- 9 exits as exhaust air 1 1 through the wire 10 again.
- the sieve 10 prevents the exit of the hollow glass microspheres 3.4. These are conveyed by the rotary valve 12 from the discharge channel 9.
- the hollow glass microspheres 3.4 have a diameter of 0.02 mm to 0.05 mm.
- borosilicate glass is melted with a antimony oxide mass fraction of 0.5% in a conventional melter at 1600 ° C melting temperature.
- the molten glass 3 passes in the feeder at a temperature of 1450 ° C through an electrically heated discharge port 1 .2 with strainer for holding refractory bricks to the electrically heated nozzle plate 2 with 22 linear nozzles 2.1 with a diameter of 1, 5 mm.
- the atomization of the molten glass, the transportation through the Rondier- / expansion channel 6 and the discharge correspond to those in the first embodiment.
- the diameter of the hollow glass microspheres 3.4 is in the range 0.02 mm to 0.04 mm.
- the nozzles 2.1 of the nozzle plate 2 according to FIG. 2 show above and below the row of nozzles in each case a symmetrically curved reinforcing bead 2.2.
- the reinforcing beads 2.2 are formed in the sheet metal components of the nozzle plate 2.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Glass Compositions (AREA)
- Manufacturing Of Micro-Capsules (AREA)
- Surface Treatment Of Glass (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016111735 | 2016-06-27 | ||
DE102016117608.7A DE102016117608A1 (de) | 2016-06-27 | 2016-09-19 | Verfahren und Vorrichtung zur Herstellung von Mikrohohlglaskugeln |
PCT/DE2017/100490 WO2018001409A1 (de) | 2016-06-27 | 2017-06-12 | Verfahren und vorrichtung zur herstellung von mikrohohlglaskugeln |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3475232A1 true EP3475232A1 (de) | 2019-05-01 |
Family
ID=60579851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17745970.8A Withdrawn EP3475232A1 (de) | 2016-06-27 | 2017-06-12 | Verfahren und vorrichtung zur herstellung von mikrohohlglaskugeln |
Country Status (13)
Country | Link |
---|---|
US (1) | US20190202727A1 (ja) |
EP (1) | EP3475232A1 (ja) |
JP (1) | JP2019518709A (ja) |
KR (1) | KR20190042549A (ja) |
CN (1) | CN109689582A (ja) |
AU (1) | AU2017287637A1 (ja) |
BR (1) | BR112018076667A2 (ja) |
CA (1) | CA3028838A1 (ja) |
DE (1) | DE102016117608A1 (ja) |
IL (1) | IL263885A (ja) |
MX (1) | MX2018016147A (ja) |
RU (1) | RU2019100695A (ja) |
WO (1) | WO2018001409A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017118897A1 (de) * | 2017-08-18 | 2019-02-21 | Bpi Beads Production International Gmbh | Verfahren zur kontinuierlichen Beschichtung von Glaspartikeln |
RU2708434C1 (ru) * | 2019-04-09 | 2019-12-06 | Тимофей Логинович Басаргин | Способ изготовления полых стеклянных микросфер и стеклянных микрошариков |
CN110773733A (zh) * | 2019-09-29 | 2020-02-11 | 西安欧中材料科技有限公司 | 一种电磁加热除气金属粉末的下粉装置 |
CN110818271B (zh) * | 2019-12-03 | 2023-05-19 | 绵阳光耀新材料有限责任公司 | 一种高折射率玻璃微珠的制备方法 |
CN117550785B (zh) * | 2024-01-12 | 2024-04-16 | 中建材玻璃新材料研究院集团有限公司 | 一种空心玻璃微珠生产用烧结设备 |
Family Cites Families (28)
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---|---|---|---|---|
US2334578A (en) | 1941-09-19 | 1943-11-16 | Rudolf H Potters | Method of and apparatus for producing glass beads |
GB564017A (en) * | 1943-05-24 | 1944-09-08 | Felix Neumann | Improvements in crucible furnaces for the manufacture of glass thread or glass silk |
US2600936A (en) | 1945-08-13 | 1952-06-17 | Wallace G Stone | Method and apparatus for measuring low pressures and related conditions |
AT175672B (de) | 1952-02-05 | 1953-08-10 | Josef Kuehtreiber | Verfahren zur Herstellung von kristallklaren Glaskügelchen, insbesondere für Rückstrahler u. dgl., samt Vorrichtung zur Durchführung desselben |
BE521556A (ja) | 1953-07-18 | |||
US2730841A (en) | 1954-08-19 | 1956-01-17 | Charles E Searight | Production of silicone-coated glass beads |
US2947115A (en) | 1955-12-01 | 1960-08-02 | Thomas K Wood | Apparatus for manufacturing glass beads |
US2965921A (en) | 1957-08-23 | 1960-12-27 | Flex O Lite Mfg Corp | Method and apparatus for producing glass beads from a free falling molten glass stream |
US3294511A (en) | 1959-04-06 | 1966-12-27 | Selas Corp Of America | Apparatus for forming glass beads |
US3074257A (en) | 1960-05-16 | 1963-01-22 | Cataphote Corp | Method and apparatus for making glass beads |
US3190737A (en) | 1960-07-07 | 1965-06-22 | Flex O Lite Mfg Corp | Glass bead furnace and method of making glass beads |
US3133805A (en) | 1961-04-26 | 1964-05-19 | Cataphote Corp | Glass bead making furnace |
US3150947A (en) | 1961-07-13 | 1964-09-29 | Flex O Lite Mfg Corp | Method for production of glass beads by dispersion of molten glass |
AT245181B (de) | 1962-03-27 | 1966-02-10 | Potters Brothers Inc | Verfahren und Vorrichtung zum Herstellen von kugelförmigen Partikeln aus Glas u. a. glasartigen Stoffen |
GB984655A (en) | 1962-12-20 | 1965-03-03 | Fukuoka Tokushugarasu Kk | Improvements in or relating to the manufacture of glass spherules |
US3293014A (en) | 1963-11-18 | 1966-12-20 | Corning Glass Works | Method and apparatus for manufacturing glass beads |
US3429721A (en) * | 1964-10-20 | 1969-02-25 | Gen Steel Ind Inc | High melting point glass beads with sharp melting range and process for making the same |
DE1285107B (de) | 1965-08-07 | 1968-12-12 | Glas U Spiegel Manufaktur Ag | Einrichtung zur Herstellung kleiner Glasperlen |
JPS5857374B2 (ja) * | 1975-08-20 | 1983-12-20 | 日本板硝子株式会社 | 繊維の製造方法 |
DD261592A1 (de) | 1987-06-01 | 1988-11-02 | Trisola Steinach Veb | Verfahren zur herstellung transparenter hochindex-mikroglaskugeln |
DE3807420A1 (de) * | 1988-03-07 | 1989-09-21 | Gruenzweig & Hartmann | Einrichtung zur erzeugung von fasern, insbesondere mineralfasern, aus einer schmelze |
FI85365C (fi) * | 1990-04-26 | 1992-04-10 | Ahlstroem Riihimaeen Lasi Oy | Foerfarande och anordning foer framstaellning av ihaoliga mikrosfaerer. |
DE19721571C2 (de) | 1997-05-23 | 2002-04-18 | Siltrade Gmbh | Verfahren zur Herstellung von Mikrokugeln |
WO2000020345A1 (en) * | 1998-10-06 | 2000-04-13 | Pq Holding, Inc. | Process and apparatus for making glass beads |
DE102007002904A1 (de) | 2007-01-19 | 2008-07-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Herstellung von Vakuumhohlkugeln aus Glas, Vakuumhohlkugeln sowie deren Verwendung |
DE102008025767B4 (de) | 2008-04-03 | 2010-03-18 | Bpi Beads Production International Gmbh | Verfahren zur Herstellung vollständig runder kleiner Kugeln aus Glas |
CN102826736A (zh) * | 2012-09-21 | 2012-12-19 | 蚌埠玻璃工业设计研究院 | 一种玻璃粉末法制备空心玻璃微珠的方法 |
EA030973B1 (ru) | 2014-01-27 | 2018-10-31 | Инженерное Бюро Франке Глас Технолоджи-Сервис | Способ и устройство для изготовления стеклянных полых сфер |
-
2016
- 2016-09-19 DE DE102016117608.7A patent/DE102016117608A1/de not_active Withdrawn
-
2017
- 2017-06-12 CN CN201780044177.3A patent/CN109689582A/zh active Pending
- 2017-06-12 EP EP17745970.8A patent/EP3475232A1/de not_active Withdrawn
- 2017-06-12 RU RU2019100695A patent/RU2019100695A/ru not_active Application Discontinuation
- 2017-06-12 KR KR1020197001398A patent/KR20190042549A/ko unknown
- 2017-06-12 WO PCT/DE2017/100490 patent/WO2018001409A1/de unknown
- 2017-06-12 JP JP2019520196A patent/JP2019518709A/ja active Pending
- 2017-06-12 CA CA3028838A patent/CA3028838A1/en not_active Abandoned
- 2017-06-12 US US16/311,786 patent/US20190202727A1/en not_active Abandoned
- 2017-06-12 AU AU2017287637A patent/AU2017287637A1/en not_active Abandoned
- 2017-06-12 BR BR112018076667A patent/BR112018076667A2/pt not_active Application Discontinuation
- 2017-06-12 MX MX2018016147A patent/MX2018016147A/es unknown
-
2018
- 2018-12-21 IL IL263885A patent/IL263885A/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2018001409A1 (de) | 2018-01-04 |
CA3028838A1 (en) | 2018-01-04 |
RU2019100695A (ru) | 2020-07-28 |
US20190202727A1 (en) | 2019-07-04 |
IL263885A (en) | 2019-01-31 |
AU2017287637A1 (en) | 2019-02-14 |
JP2019518709A (ja) | 2019-07-04 |
CN109689582A (zh) | 2019-04-26 |
DE102016117608A1 (de) | 2017-12-28 |
BR112018076667A2 (pt) | 2019-04-02 |
KR20190042549A (ko) | 2019-04-24 |
MX2018016147A (es) | 2019-06-10 |
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