Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
  • B02C23/06—Selection or use of additives to aid disintegrating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C19/00—Other disintegrating devices or methods
  • B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C19/00—Other disintegrating devices or methods
  • B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
  • B02C19/0081—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for specially adapted for breaking-up bottles
  • B02C19/0087—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for specially adapted for breaking-up bottles for glass bottles
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
  • C03B37/10—Non-chemical treatment
  • C03B37/16—Cutting or severing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C19/00—Other disintegrating devices or methods
  • B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
  • B02C19/0068—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for specially adapted for breaking-up fluorescent tubes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P40/00—Technologies relating to the processing of minerals
  • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
  • Y02P40/57—Improving the yield, e-g- reduction of reject rates
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
  • Y02W30/00—Technologies for solid waste management
  • Y02W30/20—Waste processing or separation
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber
  • Y10T428/2927—Rod, strand, filament or fiber including structurally defined particulate matter

Definitions

• US 2007/0042890 describes a process in which fibers are first roughly cut and then ground in a ball mill.
• the glass fibers used according to the invention can be coated as well as uncoated glass fibers.
• Coated glass fibers are, for example, glass fibers which have an aminosilane coating. If the glass fiber waste a high residual moisture, z. B. of> 6 wt .-%, can, preferably after the coarse crushing of the glass fibers and before the process step of comminuting the coarsely crushed glass fibers, a drying step are performed. Suitable drying devices are known to those skilled in the art. For example, the coarsely shredded glass fibers can be dried with a tempered air blower. The glass fiber waste, which is produced in the glass fiber production, are coarsely crushed in a first step, step a) by means of suitable cutting devices.
• a loose heap of glass fiber waste for example, from a container with glass fiber waste, abandoned uncontrollably on the appropriate cutting device.
• the glass fiber waste can also be unwound from a bobbin or drawn directly from the molten glass and fed to the cutting device.
• the present method is particularly suitable for so-called tangled fibers, ie coils of glass fibers without a special orientation.
• step a coarsely comminuted glass fibers having an average length of 5 to 50 mm, preferably 5 to 35 mm, more preferably 10 to 20 mm, are obtained.
• the exact size depends on the type of coarse grinding device used.
• a guillotine cutting machine gives very even lengths, while friction wheels or Toothed roller mills result in uneven lengths.
• the coarse comminution reduces entanglement in the subsequent fine comminution step.
• the surface of the granular additive has sharp edges, ie that - in the cross-sectional view - at least two legs of the granular additive tapered to a point.
• the additive is selected from quartz sand, lime, quicklime, dolomite, calcined dolomite, blast furnace slag, Al 2 O 3 , aluminum hydroxide, sodium feldspar, potassium feldspar, calcium feldspar, boric acid, boron oxide, alkali metal and alkaline earth borates and mixtures thereof ,
• the appropriate additive can be used as an additive for comminuting the coarsely comminuted glass fibers.
• additives having a d50 value in the range of 0.1 to 2 mm or 0.1 to 1.5 mm, preferably in the range of 0.3 to 1.0 mm are used. It has been shown that an additive with a larger d50 value (see Example 2) better breaks up the coarsely shredded glass fibers into pieces of suitable size. For example, it is believed that an additive with a higher d50 value will grind the millbase by the pressure of the grinding media in the mill. d50 means the particle size at which 50% by weight of the particles have a particle size smaller than the d50 value and 50% by weight have a particle size greater than the d50 value. Such values are typically derived from grading curves.
• Suitable mixing ratios of glass fibers to the additive are preferably 30/70 wt.% Or more or 40/60 or more, or 45/55 wt.% Or more.
• the upper limit is 95/05 or 80/20 wt .-%, preferably 70/30, 60/40 or 55/45. 30/70 to 80/20 wt .-% is particularly preferred.
• finely comminuted glass fibers having a length of ⁇ 2 mm, preferably ⁇ 1 mm, are obtained in step b). Fine comminution below 0.1 mm is usually not necessary.
• the separated oversize can be recycled to increase the yield of the fine grain.
• the recirculation in the process establishes a substance-flow balance.
• the feed rate at which coarsely shredded fibers and additives are introduced into the process determines the residence times. If too much material is fed into the process, the product becomes coarse-grained and the selectivity of the classifier deteriorates. In extreme cases, this can lead to blockages.
• a grinding media mill is used, another controlled variable is the level of the mill with grinding balls; more grinding balls increase the grinding intensity.
• the mixture of micronized glass fibers and additive may be screened through a sieve having a mesh size in the range of ⁇ 2.5 to 0.5 mm, more preferably in the range of ⁇ 2 to 1 mm, prior to screening to remove larger fragments.
• a further subject of the present invention is the glass fibers obtainable by the process according to the invention and a glass fiber-containing mixture comprising:
• the additive in the product has a smaller particle size than the starting materials of the process.
• Figure 1 shows fiberglass fiber pellets as obtained as a waste material.
• FIG. 2 shows a picture of fibers which have been subjected to a first coarse comminution step. These have lengths in the range of about 20 to 100 cm.
• FIG. 3 shows fibers which have been subjected to a second coarse comminution step.
• the fiber length is about 0.5 to 10 cm.
• FIG. 4 shows a micrograph after fine comminution.
• the crushed additive is also part of the material. example 1
• the coarsely crushed glass fibers were comminuted with a quartz sand (Provodiner foundry sand PR30 / 31) in a 20 kg batch ball mill.
• Example 3 A continuous milling test was carried out with a ball mill at a throughput of 100 kg / h.
• the continuously removed grain had a fiber length ⁇ 500 pm, the product had a d50 value of 14.5 pm.
• sieve residues There were the following sieve residues:

Landscapes

• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Chemical & Material Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Manufacturing & Machinery (AREA)
• Life Sciences & Earth Sciences (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Processing Of Solid Wastes (AREA)
• Glass Melting And Manufacturing (AREA)
• Glass Compositions (AREA)
• Disintegrating Or Milling (AREA)
• Manufacture, Treatment Of Glass Fibers (AREA)
• Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Priority Applications (10)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Citations (3)

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• 2012
  • 2012-12-12 AR ARP120104680A patent/AR089208A1/es not_active Application Discontinuation
  • 2012-12-17 IN IN3319CHN2014 patent/IN2014CN03319A/en unknown
  • 2012-12-17 CN CN201280060945.1A patent/CN103974776B/zh not_active Expired - Fee Related
  • 2012-12-17 JP JP2014546563A patent/JP6313710B2/ja not_active Expired - Fee Related
  • 2012-12-17 EA EA201400727A patent/EA030463B1/ru not_active IP Right Cessation
  • 2012-12-17 CA CA2859565A patent/CA2859565C/en not_active Expired - Fee Related
  • 2012-12-17 US US14/367,211 patent/US9682382B2/en not_active Expired - Fee Related
  • 2012-12-17 EP EP12808358.1A patent/EP2794111B1/de active Active
  • 2012-12-17 WO PCT/EP2012/075744 patent/WO2013092471A1/de not_active Ceased
  • 2012-12-17 KR KR1020147016731A patent/KR20140113653A/ko not_active Ceased
  • 2012-12-17 BR BR112014014099-5A patent/BR112014014099B1/pt not_active IP Right Cessation
  • 2012-12-17 PL PL12808358T patent/PL2794111T3/pl unknown
  • 2012-12-19 TW TW101148305A patent/TWI565537B/zh not_active IP Right Cessation

Patent Citations (3)

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