EP0011559B1 - Verfahren und Vorrichtung zum Zerkleinern von Mineralien auf nassem Wege - Google Patents
Verfahren und Vorrichtung zum Zerkleinern von Mineralien auf nassem Wege Download PDFInfo
- 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
Links
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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
- 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)
- Geochemistry & Mineralogy (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)
- Crushing And Grinding (AREA)
- Paper (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Disintegrating Or Milling (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Mixers Of The Rotary Stirring Type (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)
Claims (11)
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 |
---|---|---|---|
FR7832217A FR2441425A1 (fr) | 1978-11-15 | 1978-11-15 | Procede et dispositif d'attrition en voie humide |
FR7832217 | 1978-11-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0011559A1 EP0011559A1 (de) | 1980-05-28 |
EP0011559B1 true EP0011559B1 (de) | 1984-12-19 |
Family
ID=9214901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP79400847A Expired EP0011559B1 (de) | 1978-11-15 | 1979-11-12 | Verfahren und Vorrichtung zum Zerkleinern von Mineralien auf nassem Wege |
Country Status (14)
Country | Link |
---|---|
US (1) | US4434942A (de) |
EP (1) | EP0011559B1 (de) |
JP (1) | JPS55124553A (de) |
AT (1) | ATE10861T1 (de) |
AU (1) | AU537854B2 (de) |
BR (1) | BR7907421A (de) |
CA (1) | CA1151624A (de) |
DE (1) | DE2967335D1 (de) |
FR (1) | FR2441425A1 (de) |
GR (1) | GR74068B (de) |
MA (1) | MA18639A1 (de) |
OA (1) | OA06385A (de) |
PT (1) | PT70454A (de) |
YU (1) | YU278279A (de) |
Families Citing this family (14)
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 (de) * | 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 |
US10967337B2 (en) | 2016-05-20 | 2021-04-06 | 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 |
CN114174547A (zh) * | 2019-07-31 | 2022-03-11 | 杰富意钢铁株式会社 | 耐酸性管线管用高强度钢板及其制造方法以及使用耐酸性管线管用高强度钢板的高强度钢管 |
Family Cites Families (13)
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 |
US2562024A (en) * | 1945-04-03 | 1951-07-24 | Vanadium Corp Of America | Process for concentrating carnotite ores |
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 |
AU484244B2 (en) * | 1973-05-15 | 1975-11-13 | E. I. Dupont De Nemours And Company | Chemical treatment of heavy mineral concentrates |
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 |
-
1978
- 1978-11-15 FR FR7832217A patent/FR2441425A1/fr active Pending
-
1979
- 1979-11-12 AT AT79400847T patent/ATE10861T1/de not_active IP Right Cessation
- 1979-11-12 DE DE7979400847T patent/DE2967335D1/de not_active Expired
- 1979-11-12 EP EP79400847A patent/EP0011559B1/de not_active Expired
- 1979-11-12 MA MA18840A patent/MA18639A1/fr unknown
- 1979-11-12 GR GR60485A patent/GR74068B/el unknown
- 1979-11-13 YU YU02782/79A patent/YU278279A/xx unknown
- 1979-11-14 CA CA000339835A patent/CA1151624A/en not_active Expired
- 1979-11-14 BR BR7907421A patent/BR7907421A/pt unknown
- 1979-11-14 AU AU52801/79A patent/AU537854B2/en not_active Expired
- 1979-11-14 PT PT70454A patent/PT70454A/pt unknown
- 1979-11-14 JP JP14759679A patent/JPS55124553A/ja active Granted
- 1979-11-15 OA OA56947A patent/OA06385A/xx unknown
-
1981
- 1981-12-23 US US06/333,751 patent/US4434942A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0160297B2 (de) | 1989-12-21 |
DE2967335D1 (en) | 1985-01-31 |
BR7907421A (pt) | 1980-07-08 |
US4434942A (en) | 1984-03-06 |
MA18639A1 (fr) | 1980-07-01 |
OA06385A (fr) | 1981-07-31 |
FR2441425A1 (fr) | 1980-06-13 |
CA1151624A (en) | 1983-08-09 |
EP0011559A1 (de) | 1980-05-28 |
ATE10861T1 (de) | 1985-01-15 |
GR74068B (de) | 1984-06-06 |
PT70454A (en) | 1979-12-01 |
JPS55124553A (en) | 1980-09-25 |
YU278279A (en) | 1983-02-28 |
AU537854B2 (en) | 1984-07-19 |
AU5280179A (en) | 1980-05-22 |
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