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WO2003045564A1 - Corps de broyage destine a des broyeurs rotatifs - Google Patents

Corps de broyage destine a des broyeurs rotatifs Download PDF

Info

Publication number
WO2003045564A1
WO2003045564A1 PCT/BR2002/000166 BR0200166W WO03045564A1 WO 2003045564 A1 WO2003045564 A1 WO 2003045564A1 BR 0200166 W BR0200166 W BR 0200166W WO 03045564 A1 WO03045564 A1 WO 03045564A1
Authority
WO
WIPO (PCT)
Prior art keywords
grinding
mills
grinding body
revolving
cylpebs
Prior art date
Application number
PCT/BR2002/000166
Other languages
English (en)
Inventor
Ivan José DOS SANTOS
Joaquim Donizetti Donda
Original Assignee
Samarco Mineração S/A
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 Samarco Mineração S/A filed Critical Samarco Mineração S/A
Priority to AU2002347231A priority Critical patent/AU2002347231A1/en
Publication of WO2003045564A1 publication Critical patent/WO2003045564A1/fr

Links

Classifications

    • 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
    • B02C17/18—Details
    • B02C17/20—Disintegrating members

Definitions

  • the present invention relates to grinding bodies designed to be inserted into revolving mills used for reducing grain size of ores and concentrates, with a view to conform the grain size to the subsequent concentrating, pumping and pelletizing processes. Background of the invention
  • Ball mills usually refer to horizontal rotary cylinders, used for grinding ores particles.
  • the objective of grinding is to alter the grain size of mineral particles, reducing their size to a desired standard.
  • These mills are provided with pieces called grinding bodies, and about 40% of their internal volume is filled by the grinding bodies.
  • a sectioned ball mill is shown in the figure 1 of the drawings.
  • the charge undergoes such a revolving movement, that the particles to be ground suffer the action of collision of the grinding bodies and break up.
  • Such mills operate continuously, and the worn-out grinding bodies are replaced at determined intervals of time, so that the correct charge of grinding bodies inside the mill will be maintained.
  • the worn-out grinding bodies are expelled from the mill by the flow of ground material itself, a fact that occurs when the grinding bodies reach diameters smaller than 15mm.
  • More than 95% of the grinding bodies used in this activity are balls (spheres) and cylpebs (truncated-cone shaped). Besides that, pebbles or pieces of the material to be ground itself may also be used.
  • the conventional techniques further present other types of mills that use balls and cylpebs, which are the tower-type vertical mills, vibratory horizontal mills or non-rotary carcass horizontal mills, with rotary axles provided with devices for revolving the charge.
  • the balls are spheres which may be manufactured from cast iron, cast steel or laminated steel, and further may have additional elements to form alloys, such as chromium, manganese, niobium, among others.
  • the grinding bodies may be manufactured from other materials.
  • Cylpebs illustrated in the figure 3, may be manufactured from the same material of the balls, but they gain ground in application in the form of cast iron molded in chill molds, since this is the form which presents the lowest manufacture cost.
  • the size of the biggest particle to be ground in most applications ranges from 12 to 0.074 mm from ball mills. In practice, for each particle size to be ground there is an ideal, more effective size for the grinding body. These bodies are manufactured with intervals of 1.27cm or 5mm. Usu- ally, the manufacture range ranges from 25mm to 120mm.
  • the grinding bodies of the prior art used in the grinding process have characteristics that are a function of the manufacturing process: one of the factors that raise the price of the balls that actuate as grinders is that the manufacture thereof requires sand molds. Cylpebs have the great advantage that they may be manufactured on molding belts, in chill molds, in a continuous way, so that the manufacture cost will drop. However, grinding efficiency of cylpebs is lower.
  • Figure 1 shows a revolving ball mill unit with the grinding bodies arranged in its interior.
  • Figure 2 shows a grinding body in the ball format as those used in the prior art systems.
  • Figure 3 shows a further grinding body in the cylpeb format which is also largely used in the conventional grinding processes.
  • Figure 4 shows the grinding body as provided by the present invention. Detailed description of the preferred embodiments
  • the present invention may be carried out by means of a truncated cone comprising a spherical cap in its smaller base.
  • the desired technical effect that is, a grinding efficiency similar to that of the balls associated with a lower manufacturing cost, as in the case of the cylpebs, is achieved by means of the union of the two geometric formats, the sphere with a truncated cone.
  • Such grinding body that may be manufactured by the same manufacturing processes used for cylpebs, further presenting efficiency similar to that of balls, according to the data obtained from laboratory tests.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

L'invention concerne des corps de broyage destinés à des broyeurs rotatifs de forme tronconiques possédant des capuchons sphériques sur leur base la plus petite, avec des variants dans leur configuration géométrique.
PCT/BR2002/000166 2001-11-28 2002-11-27 Corps de broyage destine a des broyeurs rotatifs WO2003045564A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002347231A AU2002347231A1 (en) 2001-11-28 2002-11-27 Grinding body for revolving mills

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI0105527-5 2001-11-28
BRC10105527A BR0105527F1 (pt) 2001-11-28 2001-11-28 corpos moedores para moinhos revolventes

Publications (1)

Publication Number Publication Date
WO2003045564A1 true WO2003045564A1 (fr) 2003-06-05

Family

ID=3948121

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2002/000166 WO2003045564A1 (fr) 2001-11-28 2002-11-27 Corps de broyage destine a des broyeurs rotatifs

Country Status (3)

Country Link
AU (1) AU2002347231A1 (fr)
BR (1) BR0105527F1 (fr)
WO (1) WO2003045564A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8783589B2 (en) 2008-10-09 2014-07-22 Imerys Grinding method
JP2018508658A (ja) * 2014-12-18 2018-03-29 ボチカリョーワ，ゼニア イヴァノヴナ 使用済み電子回路基板のリサイクル方法およびそのリサイクル方法を実施するためのシステム

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2024312C1 (ru) * 1991-05-14 1994-12-15 Украинский государственный научно-исследовательский институт металлов Мелющее тело

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2024312C1 (ru) * 1991-05-14 1994-12-15 Украинский государственный научно-исследовательский институт металлов Мелющее тело

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section PQ Derwent World Patents Index; Class P41, AN 95-229637, XP002235194 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8783589B2 (en) 2008-10-09 2014-07-22 Imerys Grinding method
JP2018508658A (ja) * 2014-12-18 2018-03-29 ボチカリョーワ，ゼニア イヴァノヴナ 使用済み電子回路基板のリサイクル方法およびそのリサイクル方法を実施するためのシステム

Also Published As

Publication number Publication date
BR0105527A (pt) 2002-05-14
AU2002347231A1 (en) 2003-06-10
BR0105527C1 (pt) 2012-09-04
BRPI0105527B1 (pt) 2016-07-12
BR0105527F1 (pt) 2020-05-05

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