EP1372859A2 - Procede de separation de matieres brutes minerales a grains fins par milieu dense - Google Patents

Procede de separation de matieres brutes minerales a grains fins par milieu dense

Info

Publication number
EP1372859A2
EP1372859A2 EP02733122A EP02733122A EP1372859A2 EP 1372859 A2 EP1372859 A2 EP 1372859A2 EP 02733122 A EP02733122 A EP 02733122A EP 02733122 A EP02733122 A EP 02733122A EP 1372859 A2 EP1372859 A2 EP 1372859A2
Authority
EP
European Patent Office
Prior art keywords
liquid
flow
inlet
bath
drum
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
Application number
EP02733122A
Other languages
German (de)
English (en)
Other versions
EP1372859B1 (fr
Inventor
Heinrich Emil Jerzembski
Jan Bot
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.)
Enerco BV
Original Assignee
Enerco BV
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 Enerco BV filed Critical Enerco BV
Publication of EP1372859A2 publication Critical patent/EP1372859A2/fr
Application granted granted Critical
Publication of EP1372859B1 publication Critical patent/EP1372859B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
    • B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
    • B03B5/36—Devices therefor, other than using centrifugal force
    • B03B5/42—Devices therefor, other than using centrifugal force of drum or lifting wheel type
    • 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
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
    • B03B2011/004—Lifting wheel dischargers

Definitions

  • the invention relates to a device according to the preamble of patent claim 1 and a method according to the preamble of patent claim 14.
  • the DWP cylinder stands for cylinder and the DSM cyclone stands for cyclones and the washing drum for a sink-swim separating device, whereby the values given apply to the processing of a grain fraction of 3 to 12 mm with cylinder and cyclone and of coarse coal with the washing drum.
  • the values for the preparation of the grain fraction 3 to 12 mm with the washing drum would be significantly worse.
  • the key figure according to Terra E ⁇ which was determined from the division curve according to Tromp, was chosen as a measure of the selectivity. E ⁇ values of 0.04 for cylinders and cyclones are more theoretical targets that can hardly be achieved.
  • Devices and methods described at the outset are also known from DE 968 121, the device additionally having a second pair of inlet and outlet for the liquid below the liquid level.
  • the lower liquid flow is so strong that it drives heavy goods into the region of the scoop blades arranged laterally on the end face of the drum for the sinking of heavy goods discharge and acts as a transport flow for heavy goods.
  • Floating material adhering to the heavy material can be discharged with the sinking material, as a result of which the discharge decreases.
  • the invention is based on the technical problem of developing a device with which mineral raw materials, in particular coal of small-grain fractions, can be separated according to the density of undesired accompanying constituents, and with which high selectivity and performance can be achieved with low specific energy consumption and equipment throughput, and to propose a method with which this task can be solved.
  • This object is achieved by a device with the features of claim 1 and a method with the features of claim 14.
  • the deflection barriers proposed in a particular embodiment cause the floating material flowing on the surface to be immersed in the heavy turbidity bath, as a result of which the grains perform a movement relative to the heavy turbidity and are thereby separated from any particles of sediment still adhering or enclosed, so that they can then float again in various forms
  • the rear deflection barrier in the direction of flow has the advantage that it divides the floating material layer and reduces the thickness of the floating material layer, as a result of which the heavy material is freed from the surrounding floating material and can sink unhindered.
  • the course of the lower edge of the deflection barrier parallel to and just below the liquid level (s) has the advantage that the deflection of the heavy turbidity flow takes place in a way that does not disturb the uniform and essentially laminar flow.
  • the plate has the rear
  • Deflection barrier Shafts arranged parallel to each other in the direction of flow on, so that at the bottom of the wave profile only small floating material deposits are formed which, with their small surface area, only lead to minimal influencing and braking of the flow.
  • the shafts can have both a rounded and a V-shaped profile.
  • the height of the arrangement of the rear deflection barrier is advantageously set empirically so that a desired proportion of the floating material is gripped by the deflection barrier and pressed down into the bath.
  • a useful control variable for the portion to be recorded is the selectivity of the divorced goods, which should be determined appropriately at the overflow.
  • the upper feed line for the heavy slurry extends over the entire bath width. This is an essential prerequisite for the formation of a uniform flow over the entire width of the bath.
  • This can be designed particularly advantageously if the inlet device enables the flow profile to be controlled over its width. This is possible, for example, by means of an inlet device which consists of a container which extends over the bath width and has at least one inlet opening and a plurality of uniformly spaced openings towards the separating container, the cross-section of which can be deliberately reduced from the inside.
  • the device for the task of the raw material to be separated has a chute inclined towards the separating container with a plate arranged on the bottom made of a longitudinally corrugated profile material, the end of which is arranged at an adjustable distance above the liquid bath.
  • the slope of the chute and the Arranging their end above the liquid bath causes the raw material to be fed onto and immersed in the liquid bath at a speed adjustable by the inclination.
  • the undulating design of the chute floor leads to a reduction in the frictional resistance and thus the braking effect of the floor covering. Spraying the feed material with water supports the discharge of the raw material from the chute and dilutes the heavy sludge in the area of the raw material feed, thereby promoting the sinking of the heavy goods components.
  • the first deflecting barrier is arranged so that it lies behind the throwing parabola of the feed material so that it does not collide with the deflecting barrier, which would lead to a reduction in the feed speed and thus the immersion depth of the raw material in the gravure bath.
  • the even distribution of a large number of bags of sinking material over the circumference of the drum shell means that the material to be deposited is distributed accordingly over the different bags of sinking material and the bags are not filled unevenly and excessively.
  • the liquid-permeable design of the walls of the sinking material pockets in connection with the only slight filling of the pockets with the material to be sacked means that when a sinking material pocket is lifted out of the liquid bath, no liquid is skimmed off and the liquid level is not greatly influenced by the small displacement volume of the pocket contents.
  • the formation of two horizontal liquid flows has the advantage that the float is conveyed to the overflow with the upper liquid flow and the sinkage is caught by the flow at two different bath heights and moved relative to the heavy turbidity, as a result of which the separated heavy goods sink and adhering floats are released and float can.
  • the flow diversion intensifies the detection of heavy goods from the flow.
  • the application of the raw material at high speed to the liquid bath and the resulting deep Immersion of the sediment parts favors the separation of the heavy material parts from adhering floating material grains, which is also increased by spraying the raw material with water and the resulting dilution of the heavy sludge in the area of the raw material feed.
  • FIG. 1 shows a perspective view of a partially sectioned sink-swimming separating device
  • FIG. 2 shows the front view of a sectioned device according to FIG. 1 in operation.
  • a partially sectioned sink-float cutting device is shown in perspective.
  • the drum 2 is rotatably arranged in the trough-shaped separating container 1.
  • the drum is driven by four height-adjustable wheels (not shown) with the help of a pinion (also not shown) which engages in a centrally arranged pinion in the ring gear.
  • the sinking material pockets 3 distributed over the inner circumference of the drum shell, the walls of which are designed to be liquid-permeable, can be clearly seen.
  • the sinking material discharged into the sinking material pockets when the sinking material pockets are turned into an upper position, falls down by gravity onto a sinking material chute 4, through which the material to be deposited is brought out of the separating container.
  • cover plates 5 are arranged in the upper region.
  • the raw material to be separated is fed via the feed chute 6, which has a wavy bottom 7.
  • the front deflection barrier 8, which in the exemplary embodiment shown has the shape of an angled plate, and the rear deflection barrier 9, which consists of a corrugated plate arranged transversely to the direction of flow, which can be seen like that, are clearly visible front deflection barrier extends over the entire width of the bathroom.
  • the upper sludge inlet 10 and the overflow weir 13 located opposite one another at the same height can be clearly seen.
  • the lower slurry inlet 11 and, opposite, the outlet opening 12 of the lower slurry outlet can be seen just above the sediment pockets 3.
  • the cloudy bath limiting plate 14 is shown, to which one end of the rear deflection barrier 9 is attached.
  • Fig. 2 the front view of a cut device is shown in operation. From the right over the feed chute 6 with the corrugated floor 7, the raw material is fed through the inclination of the chute 6 at high speed as quickly as possible onto the gravity bath so that it dips into the bath. Approximately at the level of the turbid bath, fresh pulp is fed in on the right-hand side via the upper pulp inlet 10, while the overflow weir 13 is arranged at the same height, via which the horizontal flow of floating material is discharged, with corresponding amounts of turbidity also flowing off. While the proportion of heavy goods sinks down through the cloudy bath, the floating goods are conveyed to the overflow weir by the horizontal heavy turbid flow.
  • the turbid flow is deflected by the front deflecting barrier immersed in the turbid bath and by the rear deflecting barrier 9 arranged approximately in the middle between inlet 10 and overflow weir 13.
  • the deflection of the turbid stream pushes the floating parts of the floating material downwards into the bath, which intensifies the separation of the sinking material from adhering floating material grains and has an overall favorable effect on the separating effect.
  • the sinking heavy material falls into the sinking material pockets 3 distributed over the circumference and is conveyed and discharged by the rotation of the drum. After a corresponding rotation of the drum, the sinking material falls onto the sinking chute 4, via which the sinking material is discharged from the cutting device.

Landscapes

  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Extraction Or Liquid Replacement (AREA)

Abstract

L'invention concerne un dispositif pour séparer des matières brutes minérales, en particulier du charbon, d'après leur densité au moyen d'un liquide, en particulier un milieu dense. Ce dispositif comprend un conteneur de séparation (1) dans lequel un tambour (2) est disposé rotatif pour extraire le plongeant. Ce conteneur de séparation comprend des amenées (6 ; 10, 11) pour le liquide et la matière brute à séparer, ainsi qu'au moins une évacuation (12, 13) pour le liquide et un trop-plein (13) pour séparer le flottant. Les amenées et les évacuations (10, 11 ; 12, 13) sont disposées parallèlement à l'axe de rotation du tambour (2). Au moins deux amenées et deux évacuations (10 ; 11 ; 12, 13) pour le liquide sont disposées respectivement deux à deux à l'opposé à une hauteur spécifique. Au moins une amenée et une évacuation (10 ; 13) et le trop-plein (13) sont placés à hauteur du liquide et au moins une amenée et une évacuation (11, 12) sont placées juste au-dessus des poches (3) à plongeant réparties sur la périphérie du tambour. L'invention concerne également un procédé correspondant de séparation de matières brutes minérales par milieu dense.
EP02733122A 2001-03-30 2002-03-01 Procede de separation de matieres brutes minerales a grains fins par milieu dense Expired - Lifetime EP1372859B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10116027A DE10116027A1 (de) 2001-03-30 2001-03-30 Verfahren zur Sink-Schwimmscheidung feinkörniger mineralischer Rohstoffe
DE10116027 2001-03-30
PCT/IB2002/002016 WO2002078850A2 (fr) 2001-03-30 2002-03-01 Procede de separation de matieres brutes minerales a grains fins par milieu dense

Publications (2)

Publication Number Publication Date
EP1372859A2 true EP1372859A2 (fr) 2004-01-02
EP1372859B1 EP1372859B1 (fr) 2004-08-11

Family

ID=7679844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02733122A Expired - Lifetime EP1372859B1 (fr) 2001-03-30 2002-03-01 Procede de separation de matieres brutes minerales a grains fins par milieu dense

Country Status (4)

Country Link
US (1) US7004327B2 (fr)
EP (1) EP1372859B1 (fr)
DE (2) DE10116027A1 (fr)
WO (1) WO2002078850A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070294858A1 (en) * 2006-06-23 2007-12-27 Murphy Jerry A Portable Vacuum Canister and Method of Waste Disposal Therefrom
CN112439540B (zh) * 2019-08-30 2022-08-30 中国石油天然气股份有限公司 一种轻重矿物分离装置及方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1392401A (en) * 1918-07-08 1921-10-04 Henry M Chance Method and apparatus for classifying materials
US1559938A (en) * 1922-07-07 1925-11-03 Thomas M Chance Apparatus for separating materials of different specific gravities
US2590756A (en) * 1946-05-10 1952-03-25 Mines Domaniales De Potasse Art of mineral separation
DE968121C (de) * 1951-01-09 1958-01-16 Schuechtermann & Kremer Baum A Trommelsinkscheider zum Aufbereiten von Mineralien, insbesondere von Steinkohle
US2760633A (en) * 1952-05-06 1956-08-28 Nelson L Davis Method of and apparatus for sink and float separation of fine coal and the like
DE1053433B (de) * 1956-11-05 1959-03-26 Klaas Frederik Tromp Dipl Ing Vorrichtung zur Schwimm- und Sinkaufbereitung von festen Stoffen verschiedener spezifischer Gewichte
GB804616A (en) 1956-11-05 1958-11-19 Klaas Frederik Tromp Improvements in and relating to apparatus for separating granular materials having different specific gravities by means of a liquid
DE1031234B (de) * 1957-06-19 1958-06-04 Eisen & Stahlind Ag Sinkscheider zum Trennen von Mineralien
GB1050259A (fr) * 1964-04-25
US4267980A (en) * 1979-11-26 1981-05-19 Cal West Metals Separator
DE3327040A1 (de) * 1983-07-27 1985-02-07 Klöckner-Humboldt-Deutz AG, 5000 Köln Vorrichtung zur sink-schwimmscheidung mineralischer rohstoffe
US5082553A (en) * 1990-12-18 1992-01-21 Masao Tanii Concrete aggregate collecting apparatus
US5495949A (en) * 1993-07-09 1996-03-05 Olivier; Paul A. System for treating solid particles in a medium

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02078850A2 *

Also Published As

Publication number Publication date
DE50200821D1 (de) 2004-09-16
EP1372859B1 (fr) 2004-08-11
WO2002078850A2 (fr) 2002-10-10
US20040164002A1 (en) 2004-08-26
WO2002078850A3 (fr) 2002-12-05
DE10116027A1 (de) 2002-10-10
US7004327B2 (en) 2006-02-28

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