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WO1995011094A1 - Dispositif de triage et de separation de materiaux - Google Patents

Dispositif de triage et de separation de materiaux Download PDF

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Publication number
WO1995011094A1
WO1995011094A1 PCT/AU1994/000637 AU9400637W WO9511094A1 WO 1995011094 A1 WO1995011094 A1 WO 1995011094A1 AU 9400637 W AU9400637 W AU 9400637W WO 9511094 A1 WO9511094 A1 WO 9511094A1
Authority
WO
WIPO (PCT)
Prior art keywords
textured surface
separator
friction
sorter
talc
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.)
Ceased
Application number
PCT/AU1994/000637
Other languages
English (en)
Inventor
John Borcuk
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU79849/94A priority Critical patent/AU7984994A/en
Publication of WO1995011094A1 publication Critical patent/WO1995011094A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/10—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects
    • B07B13/11—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects involving travel of particles over surfaces which separate by centrifugal force or by relative friction between particles and such surfaces, e.g. helical sorters

Definitions

  • This invention relates to a device useful in the mining industry and in particular the talc mining industry.
  • Disclosed is a method and means of separating a desired material (such as talc) from foreign material quarried during a mining operation. Material is separated due to differences in the coefficients of friction.
  • Talc Mg 3 Si 4 O 10 (OH) 2
  • the quarrying operation generally results in an amount of foreign matter also being mined.
  • the foreign material is commonly dolomite, tremolite, quartz and crystal.
  • the mining is a large scale open-cut operation and all mined material goes through a sizing and sorting process.
  • the talc mining is normally done by drilling and blasting or by using a large jack-hammer type machine known as a woodpecker.
  • the removed material is loaded onto trucks and transported to an area where large pieces are broken up into sizes of fifty centimetres or less.
  • the pieces are then sized by passing over a vibrating screen.
  • a typical vibrating screen separates the talc pieces into sizes of up to 10 cm and over 10 cm up to 50 cm.
  • foreign matter such as rocks of other mineral composition
  • the amount of foreign matter mixed with the talc determines the grading of the talc.
  • talc For cosmetic use the talc must contain less than 1% acid soluble material, talc for cosmetic use is designated XL cosmetic.
  • XL Industrial talc is not as pure as XL cosmetic talc and has up to 4% acid soluble material, it is used in a variety of industrial applications.
  • Talc with a higher content of foreign matter is designated CC and is of limited use.
  • the grade of the talc is reflected in its value, hence XL cosmetic talc can be sold at a much higher price than XL industrial or CC talc. Thus there is value in removing foreign matter so as to upgrade the talc.
  • talc and foreign matter are transported on a conveyor belt past a number of persons tasked with identifying and removing foreign matter from a constant stream of material.
  • the material is wetted, typically with water, to assist in the identification of the foreign matter amongst the talc.
  • Talc has a reasonably distinctive soft whitish grey appearance whereas most foreign matter mined with the talc has a darker colouring.
  • the talc After sorting and separating, the talc is passed to a crusher where it is crushed to a fine or course powder depending on its ultimate use. Any foreign matter remaining with the talc after sorting and separation is crushed as well.
  • One object of the present invention is to provide a method and means for material sorting and separation which overcomes the above mentioned shortcomings in the existing hand sorting and separation method. It is a further object to provide a method and means of upgrading XL industrial and CC talc stocks to XL cosmetic.
  • said textured surface being of a texture such that a first material having a relatively lower coefficient of friction moves relative to the textured surface and a second material having a relatively greater coefficient of friction remains substantially stationary relative to the textured surface;
  • the coefficient of friction between two surfaces is defined as the ratio of the force required to move one surface over the other to the total force pressing the two together. In cases where two different materials are in contact with a common surface the material having the relatively lower coefficient of friction will be easier to move. The inventor has discovered that this physical fact can be used to separate materials such as talc from other materials having a relatively greater coefficient of friction.
  • the textured surface is a continuous belt and the drive means is a motor adapted to continuously drive the belt in a linear direction.
  • the belt preferably has a sloping region such that relatively lower coefficient of friction material will slide down the sloping region while relatively greater coefficient of friction material does not slide.
  • the textured surface is a disc and the drive means is a motor adapted to rotate the disc.
  • the disk is preferably rotated at an angular velocity such that relatively lower coefficient of friction material slides to the outer edge of the disc under the influence of centrifugal action whereas relatively greater coefficient of friction material does not slide.
  • FIG 1 is a sketch of a talc separation machine
  • FIG 2 is a plan view of the device of FIG 1;
  • FIG 3 is an enlarged view of a portion of FIG 1;
  • FIG 4 shows a further embodiment incorporating roll restraining lines;
  • FIG 5 shows a third embodiment of a talc separating machine.
  • FIG 1 a first embodiment of a talc sorting device, generally depicted as 1, comprising a frame 2 and textured belt 3.
  • the textured belt 3 travels in direction of arrow 4 by virtue of belt drive wheel 5 and idle wheel 6.
  • Material (including talc and foreign matter) to be sorted is delivered to the belt 3 from bin 7 and is carried in direction of arrow 4 by the belt 3.
  • Delivery to bin 7 may be in batches or a continuous feed arrangement may be used. Such material delivery systems would be known to persons skilled in the art.
  • Guides 8 direct the talc and foreign matter towards an outer edge 9 of the belt 3.
  • the belt is twisted to form a sloping surface 10 (as shown most clearly in FIG 3) in the vicinity of an exit slide 11.
  • the talc has a slippery surface and therefore slides down the sloping surface 10 and out the exit slide 11 to be collected. Foreign matter does not have such a slippery surface and therefore does not slip down the sloping surface 10.
  • the differentiation between foreign matter and talc is enhanced by providing a belt with a textured surface (as depicted particularly in FIG 3).
  • the texture of the belt surface has a holding effect on the foreign matter but, due to its low coefficient of friction, the talc slides over the textured surface.
  • the effectiveness of the separation of talc from foreign matter will depend on the texture and angle of the belt A smooth belt will permit both talc and foreign matter to slide out of the exit whereas a very textured belt could unduly restrain the talc.
  • a large angle will result in both foreign matter and talc sliding out the exit whereas a very low angle will result in no material sliding from the exit.
  • a textured belt of a rubber material having a pattern of 3 mm deep by 1 mm wide groves running both laterally and longitudinally with approximately 2 mm spacings provides an appropriate textured surface.
  • the inventor anticipates that other textured surfaces may be more appropriate with different size material or different types of foreign matter.
  • An angle of approximately 25 degrees has been found to be appropriate for the device shown in the figures. A higher angle is possible with a faster moving belt since the effectiveness of the separation process is related to the transit time of the talc across the sloped section of the belt relative to the transit time of the belt past the exit.
  • the most effective speed and angle for a given material composition and belt type can be determined by simple experimentation. The inventor has found that a belt speed of approximately 0.5 m/sec is effective for the above mentioned belt and a slope of 25 degrees in sorting talc to at least XL industrial standard. Two or more talc separators can be operated in tandem to achieve better sorting.
  • a talc separator can be constructed with two sloping regions.
  • a first low angle region will have a high sorting specificity but a relatively high proportion of talc will remain on the belt
  • a second sloping region can be used to further separate talc from foreign material.
  • Such an arrangement of two sloping regions can result in a higher talc recovery rate than a single sloping area arrangement.
  • a roll inhibiting means in the form of a number of flaps or lines are positioned over the sloping region of the belt of the first embodiment
  • FIG 4 shows one arrangement in which nylon line 15 is used to inhibit rolling of the material.
  • One end of the nylon line 15 is attached to a support bar 16 and the other end is attached to the frame adjacent the exit slide 11.
  • the inventor has found that in the absence of the roll inhibiting means some foreign matter may roll from the belt and be collected with the talc.
  • Providing flaps or lines over the sloping region inhibits the rolling of material.
  • the talc can slide past the flaps or lines but foreign matter is restrained. Such an arrangement can further improve the separation efficiency of the device.
  • the textured surface is in the form of a circularly rotating disc 17 rather than a linearly progressing belt.
  • the talc moves to the outside of the disc 18 under the influence of centrifugal action whereas the restraining action provided by a textured surface of the belt counteracts the effect of centrifugal action on foreign matter.
  • the foreign material is directed off the disk by a stop 19.
  • the material to be sorted is delivered from the bin 7.
  • the inventor envisages that the belt arrangement of the first or second embodiments can be used in tandem with the disc arrangement of the third embodiment to produce XL cosmetic talc.
  • the driven surface may be slightly agitated to promote the movement of the talc.
  • One manner of producing the agitation is by passing the driven surface over undulating rollers.

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Abstract

Un dispositif de triage et de séparation de matériaux comprend un cadre qui supporte un moteur actionnant une courroie texturée et comporte une section formant un angle sur laquelle passe la surface texturée afin de former une zone en pente. Les matériaux dotés d'un coefficient de friction relativement faible glissent vers le bas de la pente, tandis que les matériaux dotés d'un coefficient de friction relativement plus important restent pratiquement immobiles, la différence de coefficient de friction résultant en la séparation des matériaux. Ce dispositif est utile pour séparer du talc de matériaux étrangers tels que la dolomite, la trémolite ou le quartz.
PCT/AU1994/000637 1993-10-18 1994-10-18 Dispositif de triage et de separation de materiaux Ceased WO1995011094A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU79849/94A AU7984994A (en) 1993-10-18 1994-10-18 Material sorter and separator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPM185493 1993-10-18
AUPM1854 1993-10-18

Publications (1)

Publication Number Publication Date
WO1995011094A1 true WO1995011094A1 (fr) 1995-04-27

Family

ID=3777278

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1994/000637 Ceased WO1995011094A1 (fr) 1993-10-18 1994-10-18 Dispositif de triage et de separation de materiaux

Country Status (1)

Country Link
WO (1) WO1995011094A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102357902A (zh) * 2011-09-19 2012-02-22 谢宏斌 一种茉莉花深加工装置
CN106076854A (zh) * 2016-07-04 2016-11-09 陆建民 滑石与杂石选矿分离装置
CN115312687A (zh) * 2022-07-29 2022-11-08 广东邦普循环科技有限公司 一种排除电池材料中金属异物的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1636477A (en) * 1926-05-03 1927-07-19 Lee A Medcalf Sorting machine
US2788124A (en) * 1952-03-19 1957-04-09 Rca Corp Sorting apparatus
WO1989002320A1 (fr) * 1987-09-17 1989-03-23 Cyprus Industrial Minerals Company Procede et appareil de triage de materiaux particulaires par friction
DE4117029A1 (de) * 1991-05-24 1992-11-26 Steinert Gmbh Elektromagnetbau Sortiervorrichtung und verfahren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1636477A (en) * 1926-05-03 1927-07-19 Lee A Medcalf Sorting machine
US2788124A (en) * 1952-03-19 1957-04-09 Rca Corp Sorting apparatus
WO1989002320A1 (fr) * 1987-09-17 1989-03-23 Cyprus Industrial Minerals Company Procede et appareil de triage de materiaux particulaires par friction
DE4117029A1 (de) * 1991-05-24 1992-11-26 Steinert Gmbh Elektromagnetbau Sortiervorrichtung und verfahren

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102357902A (zh) * 2011-09-19 2012-02-22 谢宏斌 一种茉莉花深加工装置
CN102357902B (zh) * 2011-09-19 2014-06-04 谢宏斌 一种茉莉花深加工装置
CN106076854A (zh) * 2016-07-04 2016-11-09 陆建民 滑石与杂石选矿分离装置
CN115312687A (zh) * 2022-07-29 2022-11-08 广东邦普循环科技有限公司 一种排除电池材料中金属异物的方法
WO2024021275A1 (fr) * 2022-07-29 2024-02-01 广东邦普循环科技有限公司 Procédé d'élimination de matière étrangère métallique dans un matériau de batterie

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