EP1888243B1 - Vorrichtung zur herstellung disperser mineralischer produkte - Google Patents

Vorrichtung zur herstellung disperser mineralischer produkte Download PDF

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Publication number
EP1888243B1
EP1888243B1 EP06755254.7A EP06755254A EP1888243B1 EP 1888243 B1 EP1888243 B1 EP 1888243B1 EP 06755254 A EP06755254 A EP 06755254A EP 1888243 B1 EP1888243 B1 EP 1888243B1
Authority
EP
European Patent Office
Prior art keywords
separator
particles
mineral
separation chamber
flow
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.)
Not-in-force
Application number
EP06755254.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1888243A2 (de
Inventor
Thomas Mangelberger
Bahman Tavakkoli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omya GmbH
Original Assignee
Omya GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Omya GmbH filed Critical Omya GmbH
Publication of EP1888243A2 publication Critical patent/EP1888243A2/de
Application granted granted Critical
Publication of EP1888243B1 publication Critical patent/EP1888243B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C7/00—Separating solids from solids by electrostatic effect
    • 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
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • 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
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/14—Plant or installations having external electricity supply dry type characterised by the additional use of mechanical effects, e.g. gravity
    • B03C3/15—Centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C7/00—Separating solids from solids by electrostatic effect
    • B03C7/006—Charging without electricity supply, e.g. by tribo-electricity, pyroelectricity

Definitions

  • the invention relates to a method and apparatus for producing disperse mineral products.
  • Naturally occurring deposits of mineral raw materials consist of a mixture of different substances.
  • the minerals extracted for a given application are normally contaminated by a number of different minerals.
  • the comminuted mineral raw material is enriched and purified in an aqueous suspension by flotation, by magnetic separation or by density sorting. After cleaning, the mineral filler is finely ground in aqueous suspension and sold as a suspension, so-called "slurry".
  • slurry dry powder could also be produced from a wet-processed mineral substance, the substance would have to be dehydrated and thermally dried, but this is very energy-intensive and expensive.
  • treatment processes are generally used in which the mineral raw material is comminuted and classified by dry grinding and sifting.
  • flow classifiers are used to classify mineral products.
  • the particles produced in the milling must be dispersed in air and separated to obtain an efficient classification in the flow classifier.
  • the products produced by the flow classifier are separated from the air in downstream dedusting plants. In plants for grinding and classifying mineral substances, a complete particle disposition and dedusting system is thus installed.
  • the raw material can not be cleaned or only very inefficient. Therefore, for the production of high quality disperse mineral products, especially fillers, only very pure and high quality raw materials are used, but are available only to a limited extent.
  • the tribo-charging unit particles Due to the electric field between the differently charged plates, the previously differently charged in the tribo-charging unit particles, namely carbon on the one hand and fly ash on the other hand, separated from each other. By means of cyclones, the separated particles are separated from the gas and collected in containers.
  • Plastic waste is electrostatically separated.
  • a mixture of plastic particles in air in a rotating drum is electrostatically charged and passed through sieve holes on the circumference of the drum into a chute in which both sides of the fall plus / minus electrodes for the electrostatic separation of the particles are provided according to their different charge.
  • AU 674 011 B2 refers to a unitary unit for crushing lump coal to coal powder and supplying it in the form of a coal powder-air mixture to the burner of a coal-fired power boiler.
  • the charcoal is fed through a downpipe to a coal mill.
  • the mill has two horizontal discs with intermeshing rings. Coal and air flow radially outward through these rings. On the outer circumference of the mill a Querstromsichtung is provided. The carbon particles are triboelectrically charged in the mill.
  • the air-carbon particle ring leaving the mill is blown from below through a sight ring, the finer particles are discharged via a channel, and the coarse particles, namely pyrite impurities, fall down and thus participate a split ring / separating ring separated.
  • the invention has for its object to provide a system in which the mineral raw material is efficiently cleaned from the foreign particles, so that less pure starting raw materials can be used for the production of high quality disperse mineral products, especially fillers.
  • the system according to the invention comprises the features of claim 1.
  • Advantageous embodiments of the invention are characterized in the subclaims.
  • the charging of the particles is based on the triboelectric charging resulting from the intensive friction of the solid particles on each other and on the parts of the classifier, in particular the rotor and stator parts of a centrifugal force separator, whereupon the charged particle dispersion for the electrostatic separation of the impurities is passed from the value particles through an electrostatic separation chamber, which is switched between Strömungsklassierer and Heilabscheidesystem in the process.
  • connection pipe between the flow classifier and the electrostatic separation chamber may consist of or be lined with electrically conductive material and the electrically conductive parts may be connected to a pole of a DC voltage source.
  • the electrostatic separation chamber may be inserted into the fines stream or into the coarse material stream of the flow classifier. Apart from the subsequent electrostatic sorting the electrostatic charge is already advantageous even for the viewing process itself, since the electrostatically charged particles distribute more evenly in the air flow.
  • one or more moving or static parts of the flow classifier may be made of or coated with special materials.
  • the choice of material depends on the electron work function of the mineral components to be separated and may include materials such as steel, copper, brass, polytetrafluoroethylene, polyvinyl chloride, aluminum or ceramics.
  • the electron work function is the work required to remove an electron from the top energy band of a solid state atom; it is equal to the difference of the potential energies of an electron between the vacuum level u. the Fermi level.
  • the vacuum level here is equal to the energy of a resting electron at a great distance from the surface / the Fermi level is the electrochemical potential of the electrons in the solid state.
  • the rotor of the classifier may consist of Steel, copper or brass, because the quartz is negatively charged due to its higher work function when frictionally contacting with steel, copper or brass, and on the other hand, the calcium carbonate is positively charged due to its lower electron work on frictional contact with steel, copper or brass.
  • the crusher is preferably a ball mill, but a rod mill, autogenous mill, semi-autogenous mill, bowl mill, pin mill, impact mill, hammer mill, vibrating mill, jet mill, agitator mill, or any other suitable crusher may also be provided.
  • a centrifugal separator is preferably provided, but it can also be any other type of flow classifier can be used, for example: Querstromsichter, zigzag sifter, scattering disc air classifier, Aufstromsichter, Spiralwindsichter.
  • the solid particles to be separated can be any type, contour, size and source, as long as they are small enough to be registered in a flow classifier and classified therein and charged triboelectrically.
  • the separable solid particles should have a particle size range of less than 10 mm, wherein preferably the mean particle size should be in the range between greater than 2 microns to less than 1 mm.
  • the mineral powder to be separated can be composed of any number and in any mixture of different mineral components (valuable substances and impurities).
  • the plant after Fig. 1 contains a ball mill 1 for crushing and digestion of the mineral raw material and as a flow classifier a centrifugal separator 2, which also serves for the classification according to the invention at the same time for the triboelectric charging of the minced mineral particles.
  • the rotor shaft 25 is coated in the region of the passage through the fine material outlet pipe 14 with the sleeve 22 of electrically non-conductive material.
  • the fine material outlet pipe is protected by the electrical insulation layer 37 from uncontrolled voltage transitions.
  • the rotor shaft 25 which is under DC voltage is separated from the drive motor 18 by the electrically insulated coupling 19 and the electrical insulation layer 36.
  • the live components in the storage of the rotor shaft 25 and the slip ring 20 are separated by an electrically non-conductive protective housing 21 from the environment.
  • the fine material outlet pipe 14 of the classifier is likewise insulated from the classifier housing 23 by an electrically non-conductive insulating layer 29.
  • the classifying air is introduced through the sighting air inlet 16 and the crushed mineral powder 26 through the feed opening 27 into the viewing space and dispersed through the turbulent air flow 25 prevailing in the viewing space.
  • the particles dispersed in the air follow the air flow in the viewing space and must flow through the quickly rotating sifting basket 15. This leads to intensive contact and friction of the particles on the lamellae of the classifier basket 15 and thus to a tribo-electrostatic charge of the mineral powder. Coarse mineral particles can not flow through the classifier basket 15 but are rejected by it. This also leads to intensive contact and friction with the classifier basket 15 and the classifier housing 23 and thus also for the triboelectric charging of the coarse mineral particles 24, which are discharged through the coarse material outlet 28 from the classifier.
  • the material particles and the contaminants of the sifting basket 15 are coated with a material whose electron work function lies between the electron work function of the valuable substance and the contaminant to reinforce the triboelectric charging.
  • the fine material outlet pipe 14 may be made of a material whose electron work function lies between the electron work function of the valuable material and the contaminant.
  • connecting tube 11 between the centrifugal force separator 2 and the separation chamber 3 may be connected to the pole of a DC voltage source 10.
  • the charged fine material stream 32 passes into a preferably vertically oriented electrostatic separation chamber 3, which is equipped with separation electrodes 4, 4a.
  • the charged fines dispersion is separated into a dispersion stream 30 containing the purified product and a dispersion stream 31 containing the precipitated foreign particles.
  • the two separate dispersion streams 30 and 31 are passed through a respective system for separating the air.
  • These two air separation systems consist for example of separation cyclone 7 and / or dust filter 8 and fan 9, which by negative pressure, the required air flow to disperse and transport the mineral particles through the Flow classifier and the separation chamber generated.
  • the purified mineral powder passes into container 12, and the separated foreign particle powder passes into another container 13.
  • Fig. 4 shows an embodiment in which the fine material flow of the centrifugal separator 2 is the final product, while the coarse material flow 24 of the centrifugal separator is passed under supply of the required air 33 in an electrostatic separation chamber 3.
  • the coarse material dispersion is thus divided into two sub-streams, of which one sub-stream 34 containing the value particles, is returned to the entrance of the mill, while the foreign particles containing other sub-stream 35 - after deposition of the dispersion air - as waste or by-product is further treated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Electrostatic Separation (AREA)
  • Disintegrating Or Milling (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Extraction Or Liquid Replacement (AREA)
  • Colloid Chemistry (AREA)
EP06755254.7A 2005-05-20 2006-05-18 Vorrichtung zur herstellung disperser mineralischer produkte Not-in-force EP1888243B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005023950A DE102005023950B4 (de) 2005-05-20 2005-05-20 Anlage zur Herstellung disperser mineralischer Produkte
PCT/EP2006/062425 WO2006122967A2 (de) 2005-05-20 2006-05-18 Verfahren und vorrichtung zur herstellung disperser mineralischer produkte

Publications (2)

Publication Number Publication Date
EP1888243A2 EP1888243A2 (de) 2008-02-20
EP1888243B1 true EP1888243B1 (de) 2016-07-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06755254.7A Not-in-force EP1888243B1 (de) 2005-05-20 2006-05-18 Vorrichtung zur herstellung disperser mineralischer produkte

Country Status (24)

Country Link
US (2) US8083165B2 (pt)
EP (1) EP1888243B1 (pt)
JP (1) JP5249750B2 (pt)
KR (1) KR101304000B1 (pt)
CN (1) CN101203317B (pt)
AR (1) AR053472A1 (pt)
AU (1) AU2006248979B2 (pt)
BR (1) BRPI0610793B1 (pt)
CA (1) CA2608779C (pt)
DE (1) DE102005023950B4 (pt)
DK (1) DK1888243T3 (pt)
ES (1) ES2599177T3 (pt)
HU (1) HUE031621T2 (pt)
IL (1) IL187474A0 (pt)
JO (1) JO3198B1 (pt)
MA (1) MA29545B1 (pt)
MY (1) MY145538A (pt)
NZ (1) NZ563416A (pt)
PL (1) PL1888243T3 (pt)
PT (1) PT1888243T (pt)
RU (1) RU2420357C2 (pt)
UA (1) UA92172C2 (pt)
WO (1) WO2006122967A2 (pt)
ZA (1) ZA200710322B (pt)

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DE102011050154A1 (de) * 2011-05-06 2012-11-08 Sanovia Ag Verfahren zur Änderung der Struktur von Mineralien
DE102011054293A1 (de) * 2011-10-07 2013-04-11 Sanoviva Ag Verfahren zum Herstellen eines Mittels
WO2013177373A1 (en) * 2012-05-25 2013-11-28 Lenew Holdings, Inc. Plastic material separation system and method
CN103567045B (zh) * 2012-08-09 2016-04-20 昆山市密友粉体设备工程有限公司 涂料成套装备环保生产线
KR101569584B1 (ko) * 2013-11-21 2015-11-16 주식회사 포스코 하전유닛 및 이를 이용한 정전 선별장치
EP3135380B1 (de) * 2015-08-27 2017-10-11 Josef Fischer Kryogenmahlvorrichtung und -verfahren
US10710094B2 (en) * 2016-05-18 2020-07-14 Syrah Resources Ltd. Method and system for precision spheroidisation of graphite
CN107716309A (zh) * 2017-11-10 2018-02-23 上海燕龙基再生资源利用有限公司 用于废玻璃分拣的曲折筛分机
CN109078674B (zh) * 2018-08-28 2020-08-11 安徽东升农牧科技有限公司 一种畜牧业用饲料破碎装置
KR102336832B1 (ko) * 2021-02-03 2021-12-07 신영준 친환경 외부탄소원 대량 제조장치 및 이를 이용한 오폐수 처리방법
RU2764410C1 (ru) * 2021-09-03 2022-01-17 федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский горный университет» Способ сухого гравитационно-электрического обогащения угля

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Also Published As

Publication number Publication date
WO2006122967A2 (de) 2006-11-23
CA2608779C (en) 2015-03-31
KR20080012979A (ko) 2008-02-12
ES2599177T3 (es) 2017-01-31
JO3198B1 (ar) 2018-03-08
KR101304000B1 (ko) 2013-09-04
US8083165B2 (en) 2011-12-27
RU2007147472A (ru) 2009-06-27
CN101203317B (zh) 2013-06-19
AR053472A1 (es) 2007-05-09
ZA200710322B (en) 2009-03-25
DK1888243T3 (en) 2016-10-31
US20120056023A1 (en) 2012-03-08
US8177150B2 (en) 2012-05-15
AU2006248979B2 (en) 2011-06-02
DE102005023950B4 (de) 2007-08-02
PT1888243T (pt) 2016-10-24
JP5249750B2 (ja) 2013-07-31
AU2006248979A1 (en) 2006-11-23
PL1888243T3 (pl) 2017-03-31
BRPI0610793A2 (pt) 2010-11-03
NZ563416A (en) 2011-02-25
RU2420357C2 (ru) 2011-06-10
MY145538A (en) 2012-02-29
CA2608779A1 (en) 2006-11-23
UA92172C2 (ru) 2010-10-11
EP1888243A2 (de) 2008-02-20
HUE031621T2 (en) 2017-07-28
CN101203317A (zh) 2008-06-18
JP2008540112A (ja) 2008-11-20
IL187474A0 (en) 2008-03-20
MA29545B1 (fr) 2008-06-02
US20090032628A1 (en) 2009-02-05
DE102005023950A1 (de) 2007-01-11
BRPI0610793B1 (pt) 2018-01-23
WO2006122967A3 (de) 2007-01-18

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