EP0221377A2 - Procédé pour le broyage fin de matières minérales et dispositif pour la mise en oeuvre du procédé - Google Patents

Procédé pour le broyage fin de matières minérales et dispositif pour la mise en oeuvre du procédé Download PDF

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Publication number
EP0221377A2
EP0221377A2 EP86113849A EP86113849A EP0221377A2 EP 0221377 A2 EP0221377 A2 EP 0221377A2 EP 86113849 A EP86113849 A EP 86113849A EP 86113849 A EP86113849 A EP 86113849A EP 0221377 A2 EP0221377 A2 EP 0221377A2
Authority
EP
European Patent Office
Prior art keywords
grinding
tubes
planetary mill
mill
classifier
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.)
Withdrawn
Application number
EP86113849A
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German (de)
English (en)
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EP0221377A3 (fr
Inventor
Horst Auerbach
Hermann Dörr
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.)
Fried Krupp AG
Original Assignee
Fried Krupp AG
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 Fried Krupp AG filed Critical Fried Krupp AG
Publication of EP0221377A2 publication Critical patent/EP0221377A2/fr
Publication of EP0221377A3 publication Critical patent/EP0221377A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/32—Passing gas through 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
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/04—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
    • B02C17/08—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container with containers performing a planetary movement

Definitions

  • the invention relates to a method for the very fine comminution of mineral substances, in particular mineral raw materials in the dry state using a planetary mill according to the preamble of claim 1, and an associated device.
  • the planetary mill or planetary ball mill is a centrifugal ball mill provided with a plurality of grinding tubes, in which the grinding tubes arranged in a parallel axis rotate around a likewise parallel main axis of rotation under their own rotation.
  • a method for the very fine comminution of this type is known using a planetary mill for the treatment of very fine ore, e.g. Lead-zinc ores, which are then subjected to flotation.
  • very fine ore e.g. Lead-zinc ores
  • the axes of the grinding tubes of the planetary ball mill are arranged horizontally in the usual way.
  • the invention has for its object to provide a method with which the fine crushing of rock in the dry state can be carried out economically using a planetary mill.
  • the method according to the invention is for all mineral substances that are not too hard, in particular raw materials, such as e.g. Lignite and hard coal, bauxite, but also uranium ores and copper pebbles, cement clinker and quartz, but particularly advantageously for rocks containing calcium carbonate, such as limestone, marble, chalk, dolomite and similar rocks.
  • raw materials such as e.g. Lignite and hard coal, bauxite, but also uranium ores and copper pebbles, cement clinker and quartz, but particularly advantageously for rocks containing calcium carbonate, such as limestone, marble, chalk, dolomite and similar rocks.
  • the measure of arranging the axes of the grinding tubes to the horizontal at a certain inclination below 30 ° ensures that the residence time of the material to be ground in the grinding tubes can be adjusted almost optimally in each individual case. Sufficient fine grinding is thereby achieved without an uneconomical "over-grinding".
  • the angle to be set depends on the particular nature of the ground material, in particular on its grindability. As the grindability deteriorates, the tendency is reduced and vice versa. When running in the system with a certain regrind or when changing the regrind, the most favorable inclination setting can be tried out. Generally good results can be achieved if the axes of the grinding tubes are inclined 5 to 20 ° to the horizontal.
  • the ratio of the circulation frequency grinding tube track / grinding tube is preferably set so that it is 0.45 to 0.65. It has surprisingly been found that the most favorable milling results have been achieved in this area.
  • the material of the grinding tube wall is matched to the grinding material used in such a way that the coefficient of static friction is reduced.
  • suitable grinding media of the same type as the material to be ground results in greater economy in that these grinding media can be manufactured cheaper than the steel grinding media which are usually used.
  • a particularly precise setting of the degree of comminution and further improvements in economy can be achieved in that a sifter is connected in the circuit to the planetary mill and the coarse material separated in this sifter is returned in the circuit.
  • the classifier which is adapted to a sufficient fine comminution in the selectivity, preferably has separation limits in the range of ⁇ 40 ⁇ m.
  • a so-called channel wheel classifier is particularly suitable.
  • the regrind is fed to the classifier, a channel wheel classifier, which separates out already finely comminuted regrind as a finished product.
  • the coarser ground material separated out by the classifier, the so-called semolina is fed to an inclined planetary mill, as shown in FIG. 2, for comminution.
  • the shredded regrind, the so-called mill discharge is returned to the circuit and given to the classifier together with fresh regrind. In this way it is ensured that when using only a single classifier the ground product always has the desired fineness.
  • the gear block 6 causes the rotation of the grinding tubes 2 and 3 about the main axis of rotation 1 and the simultaneous, but opposite rotation about their own axes of rotation 8 and 9 by means of built-in drive means.
  • the grinding tubes 2 and 3 each have one above their near the end of their entry Cross section extending inlet slot wall 10.
  • the discharge wall 11 located at the end at the discharge end of the grinding tubes 2 and 3 is provided with an annular, coaxial slot 12 for the ground material to pass through.
  • Lifting strips 13 arranged on the inner wall of the grinding tube each extend in the axial direction between the inlet slot wall 10 and the discharge wall 11.
  • the bearing 5 is supported on the machine corridor 4 via an adjusting spindle 20 articulated at both ends and the bearing housing 7 via two pivot bearings 21 which are arranged in the same axis.
  • the axes of the pivot bearings 21 and the joints of the adjusting spindle 20 each run perpendicular to the main axis of rotation 1.
  • the ground material passes through a fixedly arranged inlet funnel 14 via a screw conveyor 19 and then via a distributor 15 held in the bearing 5, the two tubular arms of which each open into a flange-shaped inlet 16, which simultaneously serves to support the inlet end of the respective grinding tube.
  • the regrind then arrives in the working space of the respective grinding tube, where it is comminuted by the grinding media located therein and passed through the annular slot 12 into a downstream discharge tube 17 and is then discharged from the device via a collecting housing 18.
  • the discharge tubes 17 penetrate the gear block 6 coaxially with the axes of rotation 8 and 9 of the grinding tubes 2 and 3. Parts of the planetary mill rotating against each other are each provided with suitable sealing elements.
  • a planetary mill system corresponding to FIG. 2 is preferably designed so that its grinding drums have a clear diameter of 450 mm and an effective length of 900 mm, and the rotational frequency of the grinding tubes on the grinding tube track is set at 135 min ⁇ 1.
  • the natural frequency of the grinding tubes is 270 min ⁇ 1, which gives a grinding force of 9 g in operation with a diameter of the grinding tube track of 900 mm.
  • the height of the lifting strips is adapted to the grinding media used so that it is between 0.5 and 1.5 times the maximum grinding media diameter and is preferably set to about 0.9 times the maximum grinding media diameter.
  • the number of lifting bars depends on the clear diameter of the milling drum, but is at least 4.
  • the distance between the lifting bars evenly distributed on the circumference of the milling drum should not exceed 0.3 m and not less than 0.1 m. A distance of between 0.15 and 0.2 m is advantageous.
  • the distributor 15 downstream of the feed hopper 14 is mounted in such a way that its speed can be set independently of the rotational frequency of the grinding tubes and is operated at a 2.5- to 4-fold rotational frequency, based on the grinding tube path. In this way, congestion of the ground material can be avoided with certainty.
  • a planetary mill was used on a semi-industrial scale, which was constructed like the exemplary embodiment according to FIG. 2.
  • the inside diameter of the grinding tubes was 120 mm, the effective length of the grinding tubes was 210 mm.
  • the inclination of the main axis of rotation was set to 18 °.
  • limestone with a grain size of 1 to 3.15 mm was used as a regrind in a product rate of 25 kg / g.
  • the number of cycles, that is the ratio of the mass flow of the mill discharge to that of the ground product was 2.5. This resulted in a centrifugal force of 13 g.
  • the spherical grinding media had an average diameter of 7.2 mm and were made of steel.
  • the degree of filling of the grinding media in the grinding tubes was 0.4.
  • the planetary mill was preceded by a channel wheel classifier according to the flow diagram according to FIG. 1.
  • the ground product separated from the sewer sifter had a fineness of ⁇ 24 ⁇ m at 100% of the discharge.
  • the specific energy requirement for the grinding was below 50 kWh / t of the grinding product produced.
  • cement binder was processed into fine cement.
  • the inclination of the grinding tube axes was set to 15 °.
  • the product rate was 4 kg / h with a feed grain size ⁇ 3 mm.
  • the number of cycles was 4 and the degree of filling of the grinding media was again 0.4.
  • the resulting centrifugal force was 3 g.
  • the fineness of the ground product was 5000 cm2 / g according to Blaine.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP86113849A 1985-11-02 1986-10-07 Procédé pour le broyage fin de matières minérales et dispositif pour la mise en oeuvre du procédé Withdrawn EP0221377A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3538991 1985-11-02
DE19853538991 DE3538991A1 (de) 1985-11-02 1985-11-02 Verfahren zur feinstzerkleinerung von mineralischen stoffen und vorrichtung zur durchfuehrung des verfahrens

Publications (2)

Publication Number Publication Date
EP0221377A2 true EP0221377A2 (fr) 1987-05-13
EP0221377A3 EP0221377A3 (fr) 1988-08-03

Family

ID=6285073

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113849A Withdrawn EP0221377A3 (fr) 1985-11-02 1986-10-07 Procédé pour le broyage fin de matières minérales et dispositif pour la mise en oeuvre du procédé

Country Status (5)

Country Link
EP (1) EP0221377A3 (fr)
DE (1) DE3538991A1 (fr)
DK (1) DK505086A (fr)
ES (1) ES2003418A6 (fr)
ZA (1) ZA868259B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008596A1 (fr) * 1989-01-31 1990-08-09 Institut Khimii Tverdogo Tela I Pererabotki Mineralnogo Syrya Sibirskogo Otdelenia Akademii Nauk Sssr Broyeur planetaire a action discrete
EP0487833A2 (fr) * 1990-11-27 1992-06-03 Kurimoto, Ltd. Broyeur planétoire à boulets, balayé par un courant d'air continu
EP0508109A2 (fr) * 1991-03-12 1992-10-14 Linde Aktiengesellschaft Procédé de tamisage d'une matière à grains fins
GB2257379A (en) * 1991-07-09 1993-01-13 Ecc Int Ltd Comminution in a planetary mill.
CN100478077C (zh) * 2007-05-31 2009-04-15 中国铝业股份有限公司 一种改善铝土矿磨矿产物粒度分布的磨矿方法
CN103285977A (zh) * 2013-06-13 2013-09-11 鞍钢集团矿业公司 一种入磨前脱泥工艺
CN109012892A (zh) * 2018-10-12 2018-12-18 河南先导机械力化学研究院有限公司 一种用于行星球磨机的出料装置及出料控制方法
CN109092453A (zh) * 2018-10-12 2018-12-28 河南先导机械力化学研究院有限公司 用于行星球磨机的球磨控制装置及控制方法
CN111298952A (zh) * 2020-03-31 2020-06-19 唐山贺祥机电股份有限公司 球磨机分时段变转速变频自动运行的控制方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110586258B (zh) * 2019-08-24 2021-06-15 武汉宇格电力设备有限公司 一种工用行星式球磨机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR333272A (fr) * 1903-06-24 1903-11-20 Alcibiade Devaux Broyeur et bluterie combinés
GB191321079A (en) * 1913-09-18 1914-09-03 Boulton Ltd William Improved Cylinder or Ball Mill for use in Grinding Potters' Materials and the like.
US1772737A (en) * 1928-05-28 1930-08-12 Austice A Wise Ball mill
DE684613C (de) * 1938-09-13 1939-12-01 Emil Diepenbrock Fliehkraftmuehle mit planetenartig angetriebenen Mahlgefaessen
DE2038286A1 (de) * 1969-08-01 1971-06-24 Aydin Akis Planetenmuehle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE661988C (fr) *
DE571962C (de) * 1928-11-30 1933-03-08 Humboldt Deutzmotoren Akt Ges Rohrmuehle
US2284548A (en) * 1940-10-08 1942-05-26 Button Corp Of America Grinding mill
DE2634220C2 (de) * 1976-07-30 1985-08-08 Ed. Züblin AG, 7000 Stuttgart Drehtrommel
DE3230039C2 (de) * 1982-08-12 1984-11-08 Alkem Gmbh, 6450 Hanau Vorrichtung zum Behandeln einer körnigen Substanz, insbesondere von Kernreaktorbrennstoff in Pulverform, und Verfahren zum Betrieb der Vorrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR333272A (fr) * 1903-06-24 1903-11-20 Alcibiade Devaux Broyeur et bluterie combinés
GB191321079A (en) * 1913-09-18 1914-09-03 Boulton Ltd William Improved Cylinder or Ball Mill for use in Grinding Potters' Materials and the like.
US1772737A (en) * 1928-05-28 1930-08-12 Austice A Wise Ball mill
DE684613C (de) * 1938-09-13 1939-12-01 Emil Diepenbrock Fliehkraftmuehle mit planetenartig angetriebenen Mahlgefaessen
DE2038286A1 (de) * 1969-08-01 1971-06-24 Aydin Akis Planetenmuehle

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008596A1 (fr) * 1989-01-31 1990-08-09 Institut Khimii Tverdogo Tela I Pererabotki Mineralnogo Syrya Sibirskogo Otdelenia Akademii Nauk Sssr Broyeur planetaire a action discrete
EP0487833A2 (fr) * 1990-11-27 1992-06-03 Kurimoto, Ltd. Broyeur planétoire à boulets, balayé par un courant d'air continu
EP0487833A3 (en) * 1990-11-27 1992-07-22 Kurimoto, Ltd. Continuous air-swept type planetary ball mill
EP0508109A3 (en) * 1991-03-12 1993-03-24 Linde Aktiengesellschaft Method for screening a fine-grained material
EP0508109A2 (fr) * 1991-03-12 1992-10-14 Linde Aktiengesellschaft Procédé de tamisage d'une matière à grains fins
US5364036A (en) * 1991-07-09 1994-11-15 Ecc International Limited Comminution in a planetary mill
GB2257379A (en) * 1991-07-09 1993-01-13 Ecc Int Ltd Comminution in a planetary mill.
GB2257379B (en) * 1991-07-09 1995-04-19 Ecc Int Ltd Comminution in a planetary mill
US5513806A (en) * 1991-07-09 1996-05-07 Ecc International Limited Autogenous comminution in a planetary mill
CN100478077C (zh) * 2007-05-31 2009-04-15 中国铝业股份有限公司 一种改善铝土矿磨矿产物粒度分布的磨矿方法
CN103285977A (zh) * 2013-06-13 2013-09-11 鞍钢集团矿业公司 一种入磨前脱泥工艺
CN109012892A (zh) * 2018-10-12 2018-12-18 河南先导机械力化学研究院有限公司 一种用于行星球磨机的出料装置及出料控制方法
CN109092453A (zh) * 2018-10-12 2018-12-28 河南先导机械力化学研究院有限公司 用于行星球磨机的球磨控制装置及控制方法
CN109092453B (zh) * 2018-10-12 2021-03-09 河南先导机械力化学研究院有限公司 用于行星球磨机的球磨控制装置及控制方法
CN111298952A (zh) * 2020-03-31 2020-06-19 唐山贺祥机电股份有限公司 球磨机分时段变转速变频自动运行的控制方法

Also Published As

Publication number Publication date
DK505086A (da) 1987-05-03
ES2003418A6 (es) 1988-11-01
ZA868259B (en) 1987-07-29
EP0221377A3 (fr) 1988-08-03
DE3538991A1 (de) 1987-05-21
DK505086D0 (da) 1986-10-21

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