WO2011035451A2 - Conjunto de molinos pulverizadores para mineral conectados entre si - Google Patents
Conjunto de molinos pulverizadores para mineral conectados entre si Download PDFInfo
- Publication number
- WO2011035451A2 WO2011035451A2 PCT/CL2010/000039 CL2010000039W WO2011035451A2 WO 2011035451 A2 WO2011035451 A2 WO 2011035451A2 CL 2010000039 W CL2010000039 W CL 2010000039W WO 2011035451 A2 WO2011035451 A2 WO 2011035451A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mineral
- mills
- static
- configuration
- central
- Prior art date
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
- B02C17/04—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
- B02C17/06—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 several compartments
-
- 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
- B02C17/183—Feeding or discharging devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
- B02C21/007—Disintegrating plant with or without drying of the material using a combination of two or more drum or tube mills
Definitions
- the present invention relates to a configuration of a plurality of autogenous mills connected to each other, in closed circuit and in a single process, be it dry or wet, where all the ore as it is extracted from the mine, is sent to this configuration, reducing the feeding rocks of up to 1 m3 to fine material suitable for the flotation process.
- the grinding takes place in an autogenous way, by impacts and friction of stone against stone, where each mill of the configuration is formed by a feeding device, a static housing device and a device that generates movement of the ore to be fractionated and ground.
- the present invention relates to the milling process that operates in the mill configuration described above.
- the ore enters wet milling in ball mills, where the fine particulate of 200 Tyler meshes is obtained with the impact fragmentation between the steel balls and the ore.
- This grinding system requires a high consumption of electrical energy by maintaining an excessive counterweight in the mills that are loaded with 12 - 45% of steel balls below the radial center, with a specific weight of 8, which it is compared with the much lower specific weight of the remaining volume occupied by the mineral and water. Due to the above, 95% of the energy is lost to keep the mill's own weight moving with its load and only the remaining 5% is used in the milling of minerals. In large mining companies, several electric motors between 10,000 and 35,000 HP of power are required to operate their mills.
- patent EP 0665769 (Thomart), published on August 9, 1995, which discloses a spray method designed for a rotating ball mill or a mill with similar spray instruments that is divided into at least two spray compartments and which is passed through a stream of purifying air from top to bottom and is in a closed circuit; said mill includes at least one separation part which, between the two spray compartments, forms a small compartment joined by upper and lower walls perforated with grooves;
- the said partition is provided with means for raising the material, while it has no mechanical means for diverting the material downstream, and the material is capable of circulating diametrically through the small compartment of the partition, with means for regulating the mass of the material that passes through the mill, and means for regulating the amount of purifying air that passes through the sprayer;
- This method is characterized in that a partition is used which is provided with means to prevent the material from passing through the central part of its lower wall, and in which the transfer of the material from the upper spray compartment
- EP 0704245 (Yoshida) dated March 3, 1996, discloses a spraying process with a horizontal mill, in which spraying means are housed in a space that has an annular cross section and is located between an outer sleeve, substantially horizontal and with an inner surface on which a plurality of stirring blades are mounted, and an inner sleeve having an outer surface on which a plurality of stirring blades are mounted, said inner sleeve being coaxial with said outer sleeve, and in which at least one of said external and internal sleeves rotates to spray a material that is introduced into the space having the annular cross section, said spraying method being characterized in that: (a) at least one of said internal sleeve and said outer sleeve rotates at a rotation speed such that the maximum acceleration applied to the The sprays do not exceed three times the acceleration of gravity; (b) the diameter of the spray means is between 5 and 15 mm; (c) the interval between the inner surface of said outer sleeve and the
- a horizontal mill comprising: an outer sleeve, substantially horizontal and with an inner surface on which a plurality of stirring blades are mounted; an inner sleeve having an outer surface on which a plurality of stirring blades are mounted, said inner sleeve being coaxial with said outer sleeve; spraying means housed in an annular cross-sectional space existing between said outer sleeve and said inner sleeve; and means for rotating at least one of said outer sleeve and said inner sleeve for spraying a material that is introduced into the space that has the annular cross section, said horizontal mill being characterized in that: (a) the diameter of the spray means is between 5 and 15 mm; (b) the interval between the inner surface of said outer sleeve and the outer surface of said inner sleeve is not less than three times the diameter of the spray means; (c) the axial interval between the stirring blades of each of said internal and external sleeves is between three and sixty times the
- a first objective of the present invention is to provide a mill configuration that operates in a closed circuit, without producing dust or unbearable noise.
- a second objective is to provide a 100% autogenous mill configuration, so it does not use wear cores or grinding media, such as steel balls.
- the decrease in the size of the mineral particles is not due to fracturing, but to the impact and friction of the stones with each other.
- Another objective of the present invention is to provide a single crushing and grinding system, which replaces five conventional machines, whereby the operation and maintenance costs are significantly lower than those of traditional systems.
- Another objective of the present invention is to lower the consumption of electrical energy, to make them substantially lower, since since the mill configuration of the present invention occupies 95% of the energy to pulverize the mineral and only 5% to boost its mobile elements, where the hardness of the mineral does not affect the milling process.
- Another objective of the present invention is to provide a configuration that has the loading hopper for the feeding of material, to be installed on the central static body of the mill so that it is used by another turbo spray mill.
- This allows the feed to the central static body to distribute the load to the two turbo mineral sprayers in a single machine installed facing each other, allowing to duplicate the grinding surface inside the central static body thanks to the addition of a second turbopulverizer.
- This doubling of the grinding surface not only adds productions in a double grinding chamber, but also improves the performance of the system beyond a milling parameter of two separate mills.
- This modification also allows the mineral to be dosed to another mill attached with two identical turbo sprayers.
- the modification allows a receiving hopper to be mounted on the central static body that feeds several turbo sprayers, where each has its own engine that originates the grinding independently belonging to a single mill.
- the invention is mainly characterized, unlike prior art, because it increases production at a lower cost. It also allows to relieve the weight of the machine, as well as lower the manufacturing cost, thus avoiding gigantism that is very unfavorable.
- it is very uneconomic during maintenance, because it paralyzes production for several days during the repair, instead the modification of the original mill allows the maintenance of each unit separately without intervening operational production
- a further objective of the invention is to achieve a more efficient pulverization of the stones, given its configuration that allows the stones to move in opposite directions, and collide or friction at a higher speed.
- a final objective of the present invention is to provide a milling process that operates with the mill configuration of the present invention.
- FIGS 1, 2, 3, and 4 illustrate the prior art and Figures 5, 6 and 7 illustrate the modification contained by the present invention and, together with the description, serve to explain the principles of this invention.
- Figure 1 shows a perspective of the constituent parts of one of the mills that make up the configuration of the present invention.
- Figure 2 shows a side view of one of the mills.
- Figure 3 shows a plan view of one of the mills.
- Figure 4 shows an inside view of the loading chamber of one of the mills.
- Figure 5 shows a plan view of the four mill configuration of the present invention.
- Figure 6 shows a side view of the central body of the mill.
- Figure 7 shows a plan view of the mill of the present invention
- the present invention relates to a configuration of a plurality of turbo spray mills connected to each other, in a closed circuit and in a single process, be it dry or wet, where all the ore as it is extracted from the mine, is sent to this configuration through a central feeder that distributes the ore load to two or more turbopulvers.
- Each mill is basically made up of three elements: a loading chamber (1); a central static body (2); a turbo sprayer (3); and an engine (4).
- the mill is loaded in the loading chamber (1) through the mineral inlet (5), which is connected to a central space (7).
- the loading chamber (1) is provided with a flange (6) that allows a receiving hopper (23) of the material being fed to be superimposed, for example through a conveyor belt.
- This flange (6) is physically attached to the periphery of the loading chamber (1), which is bolted to a first coupling flange (9) of the central static body (2), which has a static chamber (8) to accommodate the load.
- the central static body (2) can have water inlets when grinding is done by a wet process.
- the reception of water for wet milling is done through a tubular water inlet coupling (11).
- the tubular coupling (12) is located for the wet milling outlet.
- the central static body (2) has a second coupling flange (10), which is connected by bolts to a splice flange (13) of the turbo spray (3).
- the fixed chamber with rotating elements has a fixed housing (14) and inside its vanes (15), leaving a free space (18) between the inner contour of the fixed housing (14) and the vanes (15).
- a shaft (16) coming from the vanes is connected with bolts to a bearing (17), which is connected to the drive shaft (18) of a motor (4).
- the loading chamber (1) has an anchor base (19), the central static body (2) has an anchor base (20);
- the turbo spray (3) has an anchor base (21); and the motor (4) has an anchor base (22), so that the mill is firmly supported by its foundation.
- the mineral or the like enters the loading chamber (1) through the entrance (5), and then passes to the central space (7), from where it flows into the static chamber (8) of the central static body (2) , where the rocks of the mineral or similar are housed as a static charge, which is distributed to the free space of the fixed housing (14) in which it receives the mineral or similar and subject it to the rotational movement through the vanes (15) , causing the contact between the mineral in motion and the static mineral, generating impacts and friction of the stones with each other, with the disintegration of the material to be ground, without causing friction with the metal that keeps it moving.
- the rigid vanes (15), inside the fixed housing (14), have the mission of holding the rock in motion, forming the torsion between the moving material and the static load.
- the previous thing produces the movement with forced friction of all the stones to each other, giving rise to an erosion with detachment of the fine particulate inside the mill.
- This autogenous grinding which can be dry or wet, is produced continuously and in a closed circuit.
- the free space (18) contains the dynamic load volume, with an isotropic distribution, which is constantly renewed with the wave of crashes between the stones.
- the renewable discharge point originates by centrifugal force from the center of the rotating drum.
- the configuration of the present invention is formed by at least one pair of mills arranged in such a way that the loading chamber (1) of each according to a single central loading chamber, with a single receiving hopper (23) for the material which is fed into a single central space (7).
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Disintegrating Or Milling (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10818214A EP2500099A2 (en) | 2009-09-23 | 2010-09-23 | Assembly of interconnected mineral pulverising mills |
AU2010300014A AU2010300014A1 (en) | 2009-09-23 | 2010-09-23 | Assembly of interconnected mineral pulverising mills |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CL2009001886A CL2009001886A1 (es) | 2009-09-23 | 2009-09-23 | Conjunto de molinos pulverizadores para mineral conectados entre si donde cada uno comprende una carcasa estatica y paletas movidas por al menos un motor y el conjunto incluye al menos dos pulverizadores con una camara de carga teniendo una tolva para la camara de carga para alimentar un unico espacio central comun. |
CL1886-2009 | 2009-09-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2011035451A2 true WO2011035451A2 (es) | 2011-03-31 |
WO2011035451A3 WO2011035451A3 (es) | 2011-07-14 |
Family
ID=43796277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CL2010/000039 WO2011035451A2 (es) | 2009-09-23 | 2010-09-23 | Conjunto de molinos pulverizadores para mineral conectados entre si |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2500099A2 (es) |
AU (1) | AU2010300014A1 (es) |
CL (1) | CL2009001886A1 (es) |
WO (1) | WO2011035451A2 (es) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0665769A1 (en) | 1992-10-28 | 1995-08-09 | Slegten Sa | METHOD AND DEVICE FOR A ROTARY TUBULAR BALL CRUSHER OR FOR A CRUSHER EQUIPPED WITH SIMILAR GRINDING INSTRUMENTS. |
EP0704245A1 (en) | 1994-09-28 | 1996-04-03 | Mitsubishi Jukogyo Kabushiki Kaisha | Pulverizing method with a horizontal mill and horizontal mill |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB296682A (en) * | 1927-03-01 | 1928-09-03 | Paul Louis Crowe | Improvements in and relating to ball mills |
US3537658A (en) * | 1968-12-10 | 1970-11-03 | Polysius Gmbh | Autogenous airswept mill |
EP2180068B1 (en) * | 2004-08-31 | 2012-02-29 | Baoshan Iron & Steel Co., Ltd. | Equipment for treating steel slag |
DE102005007254A1 (de) * | 2005-02-16 | 2006-08-17 | Polysius Ag | Mahlanlage und Vefahren zum Mahlen von Mahlgut |
ITMO20070138A1 (it) * | 2007-04-19 | 2008-10-20 | Siti B & T Group S P A | "impianto di macinazione" |
-
2009
- 2009-09-23 CL CL2009001886A patent/CL2009001886A1/es unknown
-
2010
- 2010-09-23 EP EP10818214A patent/EP2500099A2/en not_active Withdrawn
- 2010-09-23 WO PCT/CL2010/000039 patent/WO2011035451A2/es active Application Filing
- 2010-09-23 AU AU2010300014A patent/AU2010300014A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0665769A1 (en) | 1992-10-28 | 1995-08-09 | Slegten Sa | METHOD AND DEVICE FOR A ROTARY TUBULAR BALL CRUSHER OR FOR A CRUSHER EQUIPPED WITH SIMILAR GRINDING INSTRUMENTS. |
EP0704245A1 (en) | 1994-09-28 | 1996-04-03 | Mitsubishi Jukogyo Kabushiki Kaisha | Pulverizing method with a horizontal mill and horizontal mill |
Also Published As
Publication number | Publication date |
---|---|
CL2009001886A1 (es) | 2010-04-09 |
WO2011035451A3 (es) | 2011-07-14 |
EP2500099A2 (en) | 2012-09-19 |
AU2010300014A1 (en) | 2012-05-17 |
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