EP0011559B1 - Procédé et dispositif d'attrition en voie humide - Google Patents

Procédé et dispositif d'attrition en voie humide Download PDF

Info

Publication number
EP0011559B1
EP0011559B1 EP79400847A EP79400847A EP0011559B1 EP 0011559 B1 EP0011559 B1 EP 0011559B1 EP 79400847 A EP79400847 A EP 79400847A EP 79400847 A EP79400847 A EP 79400847A EP 0011559 B1 EP0011559 B1 EP 0011559B1
Authority
EP
European Patent Office
Prior art keywords
tank
stirring
fact
pulp
members
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.)
Expired
Application number
EP79400847A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0011559A1 (fr
Inventor
Jean-Louis Cardini
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.)
Societe Le Nickel SLN SA
Original Assignee
Societe Metallurgique Le Nickel SLN SA
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 Societe Metallurgique Le Nickel SLN SA filed Critical Societe Metallurgique Le Nickel SLN SA
Priority to AT79400847T priority Critical patent/ATE10861T1/de
Publication of EP0011559A1 publication Critical patent/EP0011559A1/fr
Application granted granted Critical
Publication of EP0011559B1 publication Critical patent/EP0011559B1/fr
Expired legal-status Critical Current

Links

Images

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
    • B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap

Definitions

  • the present invention relates to an attrition process which is implemented in a wet environment and which is more particularly suitable for the allocation of already ground ores. It also relates to a device for implementing this method.
  • wet attrition consists in subjecting mineral grains which are dispersed in water to friction and shock whose energy is too weak to produce a grinding, but nevertheless sufficient to release the most tender fractions, these are found in the aqueous phase in the form of very fine particles: attrition not only makes it possible to separate the tender particles, but also generates new particles due to friction and interparticle shocks.
  • Attrition a different technique, which is also called attrition, but this is not intended to create new particles. This is particularly the case in the glass industry where a so-called attrition technique is used for settling the sands: only separation is sought here.
  • Documents FR-A-2 381 108 and FR-A-2 320 781 describe a process for the preconcentration of metalliferous products or nickel ores consisting in subjecting the starting product to gentle attrition after grinding and prior pulping, controlled attrition being obtained by simple agitation of the pulp, then to carry out at least one classification.
  • An object of the present invention is to provide an attrition process which allows not only the separation of the soft fraction of the ore, but also the creation of new very fine particles.
  • An object of the invention is a process of this type which results in lower energy consumption than that of known attrition processes.
  • This object and this object, as well as others which will appear subsequently, are achieved by a wet attrition process of ores previously crushed to a size between 30 and 0.4 mm, put into pulp and subjected to a simple agitation in a slightly turbulent medium, characterized by the fact that the value of the Reynolds number of the medium is between 1,000 and 5,000, the agitation being carried out by means of at least one pair of agitation organs consisting of an upper stirring member and a lower stirring member whose lift coefficients are substantially constant over the entire length, the stirring members being such that the upper member induces a downward flow of pulp while the lower organ causes an upward flow of pulp, so that the two flows meet in the middle zone located between the two organs of the couple.
  • the dryness of the pulp is at least equal to 50% and even greater than 70%, and is preferably between 65% and 78% .
  • the present invention also relates to a device for the implementation of this method, device which comprises a tank of circular or polygonal section with at least six sides, an axial agitator provided with at least a couple of stirring members substantially horizontal, one of which is an upper agitator and the other of which is a lower agitator, an injection pipe as well as a recovery pipe, opening into the tank as close as possible to the axial agitator, characterized in that the agitating members have a substantially constant lift coefficient over their entire length, the upper and lower agitating members being such that, when the axis is rotated, the upper member induces a downward flow of pulp while that the lower organ causes an upward flow of pulp, so that the two flows meet in the median zone located between the two organs of the couple.
  • agitating members have a substantially constant lift coefficient over their entire length, that is to say that the volume flow rate per surface element is constant regardless of the position of this element within the area defined by the rotating mobile.
  • the ratio between the section of the tank and the surface of the circle generated by the rotation of the stirring members is between 1.7 and 2.4 and, preferably, between 1.9 and 2.1.
  • the vertical distance between two stirring members of the same couple is between 0.3 and 0.7 times, and preferably between 0.4 and 0.6 times, the diameter of the circle generated by the rotation of these members .
  • the vertical distance between the lower stirring member of a couple and the bottom of the tank is substantially equal to a quarter of the diameter of the circle generated by the rotation of these stirring members.
  • the distance between the upper member of a pair and the top of the tank it is advantageously substantially equal to half the diameter of the circle generated by the rotation of these stirring members.
  • each stirring member consists of three horizontal blades mounted at 120 ° from each other.
  • the device according to the present invention comprises a cylindrical tank 1 provided with an axial agitator 2 comprising an axis 5 on which is mounted a pair of agitating members 3 and 4 which are substantially horizontal.
  • the tank has a ratio between its height and its diameter of between 0.7 and 1.5, and preferably between 0.9 and 1.2.
  • the polyhedral tank has 10 to 12 sides.
  • Particularly suitable stirring members are those whose lift coefficient is constant over their entire length, and which induce identical average speeds of flow through the pulp flow whatever the position of this flow on the stirring member. Such a structure thus makes it possible to minimize the turbulence which is not necessary to achieve attrition and which entails an unnecessary consumption of energy.
  • the stirring members 3 and 4 each consist of three blades, 3a, 3b, 3c and 4a, 4b, 4c, respectively, which are mounted at 120 °, as shown in Figure 2.
  • These stirring members can be arranged so that the axis of the blade 3a is in the same vertical plane as that, for example, of the blade 4a.
  • the ratio between the free surface of the tank 1 and the surface described by the blades is between 1.7 and 2.4, and preferably between 1.9 and 2.1. According to an advantageous embodiment, this ratio is equal to 2.
  • the diameter of the inscribed circle must be taken into account.
  • the vertical distance between the two stirring members 3 and 4 is between 0.3 and 0.7 times, preferably between 0.4 and 0.6 times the diameter of the circle that they generate during their rotation.
  • the vertical distance between the bottom 7 of the tank 1 and the lower stirring member, indicated by the reference 4 in Figure 1, is equal to about half the diameter of the circle generated by the stirring members in rotation.
  • This bottom 7 can be flat or concavity directed upwards, which improves the circulation of the pulp in the tank.
  • a garnieritic nickel ore is introduced through a conduit 6 which opens at the center of the bottom 7 of the tank 1.
  • the dryness of this pulp that is to say the percentage of dry matter thereof, must be at least equal to 50% and even be greater than 70% as far as possible.
  • the ore itself it must have an optimal particle size for the type of ore treated: thus, a particle size distribution such that 80% of the particles pass through a sieve whose meshes have a size between 250 microns and 3 millimeters is considered satisfactory in this case.
  • the pulp is propelled, on the one hand, upwards by the lower member 4, and, on the other hand, downwards by the upper member 3: therefore, the mineral particles meet and collide with each other. against each other in an area located approximately halfway between the two stirring members 3 and 4.
  • the treated pulp is collected by a conduit 8 which opens in the center of the cover 9 of the tank 1. We can then either introduce it into another tank to undergo a new attrition cycle, or direct it towards other facilities.
  • the pulp flows by overflow along a cone 10 which covers the tank 1 and is collected in a gutter 11 located around the upper part of this tank.
  • the pipe 8 can be used to introduce the pulp into the tank 1, the treated pulp then flowing through the pipe 6 under the effect of the forces of gravity.
  • the pulp has to undergo another attrition cycle, this can take place in an independent tank. dante. However, this additional cycle can also be carried out in a second tank superimposed on the first, as shown in FIG. 3, the pulp circulating in an ascending manner.
  • the first attrition tank is designated by C and by C 'this upper tank.
  • the assembly has a ratio between the total height and the diameter of between 1.2 and 3, and preferably between 1.8 and 2.4.
  • a partition 12 in the center of which opens downward a cylindrical conduit 13 possibly provided with baffles which surrounds without contact the rotary axis 5.
  • This conduit 13 which is located in the space of the tank C, allows the pulp to pass from this tank C to the tank C '.
  • the length of this cylindrical conduit 13 is such that it enters the vortex created by agitation in the tank C.
  • the tank C ′ also comprises a pair of stirring members 15 and 16 identical to that of the cell C.
  • the elements similar to those of FIG. 1 have the same reference.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Crushing And Grinding (AREA)
  • Paper (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Disintegrating Or Milling (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP79400847A 1978-11-15 1979-11-12 Procédé et dispositif d'attrition en voie humide Expired EP0011559B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79400847T ATE10861T1 (de) 1978-11-15 1979-11-12 Verfahren und vorrichtung zum zerkleinern von mineralien auf nassem wege.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7832217 1978-11-15
FR7832217A FR2441425A1 (fr) 1978-11-15 1978-11-15 Procede et dispositif d'attrition en voie humide

Publications (2)

Publication Number Publication Date
EP0011559A1 EP0011559A1 (fr) 1980-05-28
EP0011559B1 true EP0011559B1 (fr) 1984-12-19

Family

ID=9214901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400847A Expired EP0011559B1 (fr) 1978-11-15 1979-11-12 Procédé et dispositif d'attrition en voie humide

Country Status (14)

Country Link
US (1) US4434942A (enrdf_load_stackoverflow)
EP (1) EP0011559B1 (enrdf_load_stackoverflow)
JP (1) JPS55124553A (enrdf_load_stackoverflow)
AT (1) ATE10861T1 (enrdf_load_stackoverflow)
AU (1) AU537854B2 (enrdf_load_stackoverflow)
BR (1) BR7907421A (enrdf_load_stackoverflow)
CA (1) CA1151624A (enrdf_load_stackoverflow)
DE (1) DE2967335D1 (enrdf_load_stackoverflow)
FR (1) FR2441425A1 (enrdf_load_stackoverflow)
GR (1) GR74068B (enrdf_load_stackoverflow)
MA (1) MA18639A1 (enrdf_load_stackoverflow)
OA (1) OA06385A (enrdf_load_stackoverflow)
PT (1) PT70454A (enrdf_load_stackoverflow)
YU (1) YU278279A (enrdf_load_stackoverflow)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60255154A (ja) * 1984-06-01 1985-12-16 濱田重工株式会社 竪型微粉砕機
JPH0352108Y2 (enrdf_load_stackoverflow) * 1987-03-27 1991-11-11
US4930576A (en) * 1989-04-18 1990-06-05 Halliburton Company Slurry mixing apparatus
SE503898C2 (sv) * 1994-10-25 1996-09-30 Tetra Laval Holdings & Finance Blandare för blandning av vätskor eller suspensioner samt förfarande för blandning
NL1002649C2 (nl) * 1996-03-19 1997-09-22 Coen Hendrik Decnop Menginrichting.
US5964527A (en) * 1997-03-19 1999-10-12 Decnop; Coen Hendrik Mixing device
FI112096B (sv) * 2001-07-06 2003-10-31 Omg Finland Oy Förfarande vid utvinning av nickel och eventuellt kobolt medelst lakning ur nickelhaltig lateritmalm
US20050221246A1 (en) * 2003-10-31 2005-10-06 Dan Drinkwater Apparatus and method for liberating deleterious material from fine aggregate
US7168641B2 (en) * 2004-08-31 2007-01-30 Spx Corporation Attrition scrubber apparatus and method
CN101823059B (zh) * 2009-03-05 2012-01-04 中国恩菲工程技术有限公司 红土矿洗矿设备
CA2967880C (en) 2016-05-20 2023-03-21 Superior Industries, Inc. Aggregate attrition systems, methods, and apparatus
USD873305S1 (en) 2017-05-19 2020-01-21 Superior Industries, Inc. Attrition mill propeller
CN108262144B (zh) * 2018-01-24 2019-09-06 泉州台商投资区万鼎机械科技有限公司 一体化中药材智能研磨设备
KR20220032115A (ko) * 2019-07-31 2022-03-15 제이에프이 스틸 가부시키가이샤 내사우어 라인 파이프용 고강도 강판 및 그의 제조 방법 그리고 내사우어 라인 파이프용 고강도 강판을 이용한 고강도 강관

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1741063A (en) * 1929-01-21 1929-12-24 Mason Arthur John Method of washing granular material
US2136726A (en) * 1936-05-12 1938-11-15 Raymond G Osborne Concentration method
GB566687A (en) 1942-11-18 1945-01-09 Cowles Co Improvement in apparatus for disseminating materials in liquids
US2562024A (en) * 1945-04-03 1951-07-24 Vanadium Corp Of America Process for concentrating carnotite ores
US2464588A (en) 1945-08-03 1949-03-15 Pittsburgh Plate Glass Co Machine for dispersing agglomerated pigments in liquids
DE1296950B (de) * 1965-05-24 1969-06-04 Draiswerke Gmbh Kontinuierlich arbeitende Ruehrwerksmuehle
US3404870A (en) * 1965-09-23 1968-10-08 Robert K. Multer Agitator
US3495808A (en) * 1967-08-29 1970-02-17 Owens Corning Fiberglass Corp Automatic binder mix system
US3592446A (en) * 1969-05-19 1971-07-13 Max Leva Method and apparatus for continuous blending of granular materials
SU411903A1 (enrdf_load_stackoverflow) 1971-04-24 1974-01-25
GB1336193A (en) 1971-11-16 1973-11-07 British Titan Ltd Milling process and apparatus
AU484244B2 (en) * 1973-05-15 1975-11-13 E. I. Dupont De Nemours And Company Chemical treatment of heavy mineral concentrates
SU520130A2 (ru) 1973-11-06 1976-07-05 Проектно-Конструкторское Бюро Главстроймеханизации Оттирочна машина
JPS5187858A (ja) * 1975-01-30 1976-07-31 Toyo Ink Mfg Co Kosokukaitenbaitaibunsankino kidobarikigenshoho
DE2626757C2 (de) * 1975-07-09 1984-03-15 Meyer AG Zuchwil, Zuchwil Rührwerkmühle, insbesondere Kolloidmühle
FR2320781A1 (fr) * 1975-08-14 1977-03-11 Nickel Sln Ste Metallurg Le Procede pour preconcentrer des minerais nickeliferes oxydes d'origine lateritique
DE2616155A1 (de) * 1976-04-13 1977-10-27 Karl Heinz Dipl Ing Meller Nassmahlvorrichtung
FR2381108A1 (fr) * 1977-02-16 1978-09-15 Minemet Rech Sa Procede pour la preconcentration de produits metalliferes

Also Published As

Publication number Publication date
EP0011559A1 (fr) 1980-05-28
ATE10861T1 (de) 1985-01-15
YU278279A (en) 1983-02-28
AU537854B2 (en) 1984-07-19
JPS55124553A (en) 1980-09-25
GR74068B (enrdf_load_stackoverflow) 1984-06-06
JPH0160297B2 (enrdf_load_stackoverflow) 1989-12-21
FR2441425A1 (fr) 1980-06-13
BR7907421A (pt) 1980-07-08
CA1151624A (en) 1983-08-09
OA06385A (fr) 1981-07-31
PT70454A (en) 1979-12-01
MA18639A1 (fr) 1980-07-01
US4434942A (en) 1984-03-06
DE2967335D1 (en) 1985-01-31
AU5280179A (en) 1980-05-22

Similar Documents

Publication Publication Date Title
EP0011559B1 (fr) Procédé et dispositif d'attrition en voie humide
CA2044902C (fr) Procede et dispositif de separation entre une phase fluide continue et une phase dispersee, et application
FR2648725A1 (fr) Procede et dispositif de desaeration de liquides
EP2643100B1 (fr) Dispositif et procede d'egouttage-rincage de matieres granulaires solides, riches en particules filiformes (i.e. des cables metalliques)
FR2539772A1 (fr) Appareil centrifuge pour l'epuration de suspensions liquides contenant des impuretes solides
EP3648862A1 (fr) Installation pour le traitement des eaux et procédé correspondant
US4157951A (en) Beneficiation apparatus
DE102004024791B4 (de) Verfahren zum Trennen von Feststoffen einer Feststoffmischung
US4230561A (en) Method and apparatus for separating clay from coal fines
EP0252785A1 (fr) Appareillage mélangeur-décanteur à goulotte noyée
FR2529593A1 (fr) Procede et appareil de traitement de papier de recuperation
FR2573340A1 (fr) Procede de separation et de traitement de dechets de plastiques en vue de leur reutilisation et dispositif pour sa mise en oeuvre
FR2461527A1 (fr) Procede et dispositif pour le traitement de vieilles matieres notamment de debris d'accumulateurs, par sedimentation et flottation combinees
US4222860A (en) Method for the beneficiation of ore
FR2564749A1 (fr) Procede et installation pour le traitement des minerais d'or
RU2066565C1 (ru) Сепаратор центробежно-вибрационный
BE519876A (enrdf_load_stackoverflow)
FR2554007A1 (fr) Procede et dispositif de separation des emulsions graisse-eau et/ou huile-eau
RU2062149C1 (ru) Центробежный сепаратор
FR2716391A1 (fr) Installation et procédé de traitement propre de fluides chargés en particules, tels que boues ou vases.
FR2645558A1 (fr) Procede d'enlevement de petrole de la surface de l'eau et recipient collecteur
BE506318A (enrdf_load_stackoverflow)
BE505306A (enrdf_load_stackoverflow)
CH596887A5 (en) Classifier for material suspended in water
BE881831A (fr) Procede et appareil pour le classement d'objets

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19800711

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

REF Corresponds to:

Ref document number: 10861

Country of ref document: AT

Date of ref document: 19850115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 2967335

Country of ref document: DE

Date of ref document: 19850131

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19851130

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19860801

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19901017

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19901026

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19901109

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19901115

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19901128

Year of fee payment: 12

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19901130

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19910214

Year of fee payment: 12

EPTA Lu: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19911112

Ref country code: AT

Effective date: 19911112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19911113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Effective date: 19911130

Ref country code: BE

Effective date: 19911130

BERE Be: lapsed

Owner name: SOC. METALLURGIQUE LE NICKEL - SLN

Effective date: 19911130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19920601

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed

Ref document number: 79400847.4

Effective date: 19920604

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19981007

Year of fee payment: 20