WO2009156227A1 - Method and cooler for cooling hot particulate material - Google Patents

Method and cooler for cooling hot particulate material Download PDF

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Publication number
WO2009156227A1
WO2009156227A1 PCT/EP2009/055887 EP2009055887W WO2009156227A1 WO 2009156227 A1 WO2009156227 A1 WO 2009156227A1 EP 2009055887 W EP2009055887 W EP 2009055887W WO 2009156227 A1 WO2009156227 A1 WO 2009156227A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressed air
grate
gas duct
cooling gas
injected
Prior art date
Application number
PCT/EP2009/055887
Other languages
French (fr)
Inventor
Alexander Flavio Tokman
Original Assignee
Flsmidth A/S
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 Flsmidth A/S filed Critical Flsmidth A/S
Priority to CN2009801316066A priority Critical patent/CN102124294A/en
Priority to MX2010014535A priority patent/MX2010014535A/en
Priority to DE112009001569T priority patent/DE112009001569T5/en
Priority to BRPI0914725A priority patent/BRPI0914725A2/en
Priority to US13/000,418 priority patent/US20110146946A1/en
Publication of WO2009156227A1 publication Critical patent/WO2009156227A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/47—Cooling ; Waste heat management
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/08—Parts thereof
    • F26B25/10—Floors, roofs, or bottoms; False bottoms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/38—Arrangements of cooling devices
    • F27B7/383—Cooling devices for the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
    • F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
    • F28C3/16—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid the particulate material forming a bed, e.g. fluidised, on vibratory sieves

Definitions

  • the present invention relates to a method for cooling hot particulate material which has been subjected to heat treatment in an industrial kiln, such as a rotary kiln for manufacturing cement clinker, whereby the hot material from the kiln is directed onto a grate in a cooler where cooling gases via at least one cooling gas duct are led through slots in the grate for cooling the hot material and where compressed air can be injected into the material on the grate.
  • the invention also relates to a cooler for carrying out the method.
  • a cooler of the above mentioned kind is known from EP 1 774 236 where compressed air from a separate system can be intermittently injected into the material on the grate with a view to removing any agglomerates and so-called snowmen formations which are formed by the clogging of clinker material, and causing decreased efficiency of the cooler, and where the duct for cooling gases through the use of an appropriate valve arrangement in the form of for example a tilting damper is blanked off when compressed air is injected.
  • the disadvantage of this known cooler is that the valve arrangement is a mechanically movable component which may wear out relatively quickly when exposed to compressed air in expansion, consequently giving rise to operational problems.
  • the compressed air which is injected into the cooling gas duct will operate as a non-return valve which will ensure that compressed air is injected into the material on the grate. This is due to the fact that the mass flow inertia and the dynamic pressure of the compressed air being injected into the cooling gas duct will prevent a backflow of the compressed air in the cooling gas duct. The blanking-off of the cooling gas duct thus achieved will further prevent clinker dust from falling through the cooling gas duct.
  • At least a portion of the compressed air which is injected via the cooling gas duct is directed through the slots in the grate and into the material deposited on the grate.
  • the compressed air may be injected into the cooling gas duct at any conceivable angle relative to the centreline of the cooling gas duct.
  • the compressed air should be injected into the cooling gas duct with a velocity component which is parallel to the centreline of the cooling gas duct and pointing in direction towards the grate, which means that the compressed air must be injected at an angle ⁇ of less than 90° relative to the centreline of the cooling gas duct. It is preferred that the compressed air is injected at an angle ⁇ of less than 10°, preferably at an angle of 0° relative to the centreline of the cooling gas duct.
  • compressed air may be injected via other pipelines or ducts into the material on the grate while compressed air is simultaneously injected into the cooling gas duct in order to provide the static pressure between the cooling grate and the material which is required for transiently generating an air cushion which will lift the material off the grate, thereby removing snowmen formations and other major material agglomerations from the grate, and leading them downstream through the cooler.
  • the cooler for carrying out the method according to the invention comprises a grate for receiving and supporting hot material from a kiln, at least one cooling gas duct which is connected to slots in the grate for introducing cooling gases into the hot material and a compressed air system for injecting compressed air into the material on the grate and being characterized in that it comprises means for injecting compressed air into the cooling gas duct.
  • the cooler comprises other means for injecting compressed air into the material on the grate simultaneously with the injection of compressed air into the cooling gas duct.
  • Fig. 1 shows a side view of a cooler according to the invention
  • Figs. 2 and 3 show different embodiments of the cooler according to the invention.
  • a cooler 1 which is installed in direct extension of a rotary kiln 3 for manufacturing cement clinker.
  • the cooler comprises an inlet end 4 and an outlet end 5.
  • the cooler shown also comprises a stationary grate bottom 11 for supporting the cement clinker, a fan 12 for injecting cooling gases up through the clinker via a compartment 13 and not shown in greater detail slots in the inlet grate 11 , as well as a number of scraping elements 14 which by means of a not shown driving mechanism can be moved back and forth in the longitudinal direction of the cooler so that the clinker is moved from the inlet end of the cooler to its outlet end.
  • the cooler shown also comprises an inlet grate 21 which is located in the inlet end 4 of the cooler immediately under the outlet end of the rotary kiln for receiving the hot cement clinker 2.
  • the design features of the inlet grate are outside the scope of this invention, and may in principle be configured in any appropriate manner.
  • the inlet grate 21 shown as an example is stepped and made up of a number of grate shoes 22.
  • the inlet grate is mounted at a certain inclination relative to the horizontal plane in order to promote the movement of the clinker through the cooler.
  • the cooler also comprises a fan 23 for injecting cooling gas through the clinker via a compartment 24, cooling gas ducts 28 and slots 20 in the inlet grate 22, as well as a separate compressed air system comprising a compressed air tank 25 and a number of pipelines 26 for injecting compressed air into the material on the inlet grate.
  • the pressurized tank 25 may in an alternative embodiment be constituted by a fan.
  • each pipeline 26 for injecting compressed air into the material on the inlet grate is connected to a cooling gas duct 28, causing the compressed air to be injected into the cooling gas duct, being subsequently passed on to the herewith connected grate shoe 22 and passing through the slots 20 in the grate 21.
  • the compressed air may be injected into the cooling gas duct 28 at any conceivable angle relative to the centreline of the cooling gas duct 28.
  • the compressed air should be injected into the cooling gas duct 28 at an angle ⁇ of less than 90° relative to the centreline of the cooling gas duct to ensure that the compressed air will have a velocity component which is parallel to the centreline of the cooling gas duct 28 and pointing in the direction towards the grate 21.
  • the compressed air is injected at an angle ⁇ of about 30° relative to the centreline of the cooling gas duct 28, whereas the compressed air in the preferred embodiment shown in Fig. 2 is injected parallel to the centreline of the cooling gas duct 28.
  • the compressed air system is closed by means of a valve, such as a solenoid valve.
  • a valve such as a solenoid valve.
  • the compressed air system is opened, causing compressed air to be injected into the cooling gas ducts 28 and directed through the grate shoes 22 towards the clinker bed 2 so that the static pressure between the grate 21 and the clinker bed 2 is increased while transiently generating an air cushion which will lift the material off the grate. Snowmen formations and other major material agglomerations will also be lifted off the inlet grate, subsequently continuing their movement downstream through the cooler.
  • the cooler may comprise a valve (not shown), such as a solenoid valve, in each compressed air line 26 communicating with the grate.
  • Compressed air may further via other pipelines or ducts, not shown, be injected into the material on the grate subject to simultaneous injection of compressed air into the cooling gas duct 28 in order to generate the static pressure between the cooling grate 21 and the material bed 2 required to transiently lift the material off the grate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

A description is provided of a method as well as a cooler (1) for cooling hot particulate material which has been subjected to heat treatment in an industrial kiln, such as a rotary kiln (3) for manufacturing cement clinker whereby the hot material from the kiln (3) is directed onto a grate (21) in a cooler (1) where cooling gases via at least one cooling gas duct (28) are directed through slots (20) in the grate for cooling the hot material and where compressed air can be injected into the material on the grate (21). The method as well as the cooler is characterized in that compressed air is injected into the cooling gas duct (28). It is hereby obtained that the compressed air which is injected into the cooling gas duct (28) will operate as a non-return valve which will ensure that compressed air is injected into the material on the grate (21). This is due to the fact that the mass flow inertia and the dynamic pressure of the compressed air being injected into the cooling gas duct (28) will prevent a backflow of the compressed air into the cooling gas duct (28). The blanking-off of the cooling gas duct (28) thus achieved will further prevent clinker dust from falling through the cooling gas duct.

Description

METHOD AND COOLER FOR COOLING HOT PARTICULATE MATERIAL
The present invention relates to a method for cooling hot particulate material which has been subjected to heat treatment in an industrial kiln, such as a rotary kiln for manufacturing cement clinker, whereby the hot material from the kiln is directed onto a grate in a cooler where cooling gases via at least one cooling gas duct are led through slots in the grate for cooling the hot material and where compressed air can be injected into the material on the grate. The invention also relates to a cooler for carrying out the method.
A cooler of the above mentioned kind is known from EP 1 774 236 where compressed air from a separate system can be intermittently injected into the material on the grate with a view to removing any agglomerates and so-called snowmen formations which are formed by the clogging of clinker material, and causing decreased efficiency of the cooler, and where the duct for cooling gases through the use of an appropriate valve arrangement in the form of for example a tilting damper is blanked off when compressed air is injected. The disadvantage of this known cooler is that the valve arrangement is a mechanically movable component which may wear out relatively quickly when exposed to compressed air in expansion, consequently giving rise to operational problems.
It is the object of the present invention to provide a method as well as a cooler for cooling hot particulate material whereby the aforementioned disadvantage is eliminated.
This is achieved by a cooler of the kind mentioned in the introduction and being characterized in that compressed air is injected into the cooling gas duct.
It is hereby obtained that the compressed air which is injected into the cooling gas duct will operate as a non-return valve which will ensure that compressed air is injected into the material on the grate. This is due to the fact that the mass flow inertia and the dynamic pressure of the compressed air being injected into the cooling gas duct will prevent a backflow of the compressed air in the cooling gas duct. The blanking-off of the cooling gas duct thus achieved will further prevent clinker dust from falling through the cooling gas duct.
Preferably, at least a portion of the compressed air which is injected via the cooling gas duct is directed through the slots in the grate and into the material deposited on the grate.
In principle, the compressed air may be injected into the cooling gas duct at any conceivable angle relative to the centreline of the cooling gas duct. In order to achieve the best effect, the compressed air should be injected into the cooling gas duct with a velocity component which is parallel to the centreline of the cooling gas duct and pointing in direction towards the grate, which means that the compressed air must be injected at an angle α of less than 90° relative to the centreline of the cooling gas duct. It is preferred that the compressed air is injected at an angle α of less than 10°, preferably at an angle of 0° relative to the centreline of the cooling gas duct.
In one embodiment of the invention, compressed air may be injected via other pipelines or ducts into the material on the grate while compressed air is simultaneously injected into the cooling gas duct in order to provide the static pressure between the cooling grate and the material which is required for transiently generating an air cushion which will lift the material off the grate, thereby removing snowmen formations and other major material agglomerations from the grate, and leading them downstream through the cooler. However, it is preferred that all compressed air is injected via the cooling gas duct and subsequently directed through the slots in the grate.
The cooler for carrying out the method according to the invention comprises a grate for receiving and supporting hot material from a kiln, at least one cooling gas duct which is connected to slots in the grate for introducing cooling gases into the hot material and a compressed air system for injecting compressed air into the material on the grate and being characterized in that it comprises means for injecting compressed air into the cooling gas duct.
It is further proposed that the cooler comprises other means for injecting compressed air into the material on the grate simultaneously with the injection of compressed air into the cooling gas duct.
The invention will now be described in further details with reference to the drawing, being diagrammatical, and where
Fig. 1 shows a side view of a cooler according to the invention, and
Figs. 2 and 3 show different embodiments of the cooler according to the invention.
In Fig. 1 is seen a cooler 1 which is installed in direct extension of a rotary kiln 3 for manufacturing cement clinker. The cooler comprises an inlet end 4 and an outlet end 5. The cooler shown also comprises a stationary grate bottom 11 for supporting the cement clinker, a fan 12 for injecting cooling gases up through the clinker via a compartment 13 and not shown in greater detail slots in the inlet grate 11 , as well as a number of scraping elements 14 which by means of a not shown driving mechanism can be moved back and forth in the longitudinal direction of the cooler so that the clinker is moved from the inlet end of the cooler to its outlet end.
The cooler shown also comprises an inlet grate 21 which is located in the inlet end 4 of the cooler immediately under the outlet end of the rotary kiln for receiving the hot cement clinker 2. The design features of the inlet grate are outside the scope of this invention, and may in principle be configured in any appropriate manner. The inlet grate 21 shown as an example is stepped and made up of a number of grate shoes 22. The inlet grate is mounted at a certain inclination relative to the horizontal plane in order to promote the movement of the clinker through the cooler. In the inlet section the cooler also comprises a fan 23 for injecting cooling gas through the clinker via a compartment 24, cooling gas ducts 28 and slots 20 in the inlet grate 22, as well as a separate compressed air system comprising a compressed air tank 25 and a number of pipelines 26 for injecting compressed air into the material on the inlet grate. The pressurized tank 25 may in an alternative embodiment be constituted by a fan. As illustrated in Figs. 1 to 3, each pipeline 26 for injecting compressed air into the material on the inlet grate is connected to a cooling gas duct 28, causing the compressed air to be injected into the cooling gas duct, being subsequently passed on to the herewith connected grate shoe 22 and passing through the slots 20 in the grate 21.
As is apparent from Figs. 2 to 3, the compressed air may be injected into the cooling gas duct 28 at any conceivable angle relative to the centreline of the cooling gas duct 28. However, to achieve the best effect, the compressed air should be injected into the cooling gas duct 28 at an angle α of less than 90° relative to the centreline of the cooling gas duct to ensure that the compressed air will have a velocity component which is parallel to the centreline of the cooling gas duct 28 and pointing in the direction towards the grate 21. In the embodiment shown in Fig. 3, the compressed air is injected at an angle α of about 30° relative to the centreline of the cooling gas duct 28, whereas the compressed air in the preferred embodiment shown in Fig. 2 is injected parallel to the centreline of the cooling gas duct 28.
During normal operation of the cooler, the compressed air system is closed by means of a valve, such as a solenoid valve. At intervals, the length of which may be predefined or specifically adapted according to the prevailing operating conditions, the compressed air system is opened, causing compressed air to be injected into the cooling gas ducts 28 and directed through the grate shoes 22 towards the clinker bed 2 so that the static pressure between the grate 21 and the clinker bed 2 is increased while transiently generating an air cushion which will lift the material off the grate. Snowmen formations and other major material agglomerations will also be lifted off the inlet grate, subsequently continuing their movement downstream through the cooler. Also it may be desirable to inject compressed air only into selected areas of the inlet grate and, therefore, the cooler may comprise a valve (not shown), such as a solenoid valve, in each compressed air line 26 communicating with the grate.
Compressed air may further via other pipelines or ducts, not shown, be injected into the material on the grate subject to simultaneous injection of compressed air into the cooling gas duct 28 in order to generate the static pressure between the cooling grate 21 and the material bed 2 required to transiently lift the material off the grate.

Claims

Patent claims
1. A method for cooling hot particulate material which has been subjected to heat treatment in an industrial kiln, such as a rotary kiln (3) for manufacturing cement clinker, whereby the hot material from the kiln (3) is directed onto a grate (21 ) in a cooler (1 ) where cooling gases via at least one cooling gas duct (28) are led through slots (20) in the grate for cooling the hot material and where compressed air can be injected into the material on the grate (21 ), characterized in that compressed air is injected into the cooling gas duct (28).
2. A method according to claim 1 , characterized in that at least a portion of the compressed air which is injected into the cooling gas duct (28) is directed through the slots (20) in the grate (21 ) and into the material deposited on the grate (21 ).
3. A method according to claim 1 or 2, characterized in that the compressed air is injected at an angle α of less than 90° relative to the centreline of the cooling gas duct (28).
4. A method according to claim 1 or 2, characterized in that the compressed air is injected at an angle α of less than 10° relative to the centreline of the cooling gas duct (28).
5. A method according to claim 1 or 2, characterized in that the compressed air is injected at an angle α of 0° relative to the centreline of the cooling gas duct (28).
6. A cooler (1 ) for carrying out the method according to the claims 1-5 comprising a grate (21 ) for receiving and supporting hot material from a kiln (3), at least one cooling gas duct (28) which is connected to slots (20) in the grate for introducing cooling gases to the hot material (2) and a compressed air system (25, 26) for injecting compressed air into the material (2) on the grate (21 ), characterized in that it comprises means (26) for injecting compressed air into the cooling gas duct (28).
PCT/EP2009/055887 2008-06-26 2009-05-15 Method and cooler for cooling hot particulate material WO2009156227A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN2009801316066A CN102124294A (en) 2008-06-26 2009-05-15 Method and cooler for cooling hot particulate material
MX2010014535A MX2010014535A (en) 2008-06-26 2009-05-15 Method and cooler for cooling hot particulate material.
DE112009001569T DE112009001569T5 (en) 2008-06-26 2009-05-15 Method and cooling device for cooling a hot particulate material
BRPI0914725A BRPI0914725A2 (en) 2008-06-26 2009-05-15 method and chiller for cooling hot particulate material
US13/000,418 US20110146946A1 (en) 2008-06-26 2009-05-15 Method and Cooler for Cooling Hot Particulate Material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200800879 2008-06-26
DKPA200800879 2008-06-26

Publications (1)

Publication Number Publication Date
WO2009156227A1 true WO2009156227A1 (en) 2009-12-30

Family

ID=40933628

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/055887 WO2009156227A1 (en) 2008-06-26 2009-05-15 Method and cooler for cooling hot particulate material

Country Status (7)

Country Link
US (1) US20110146946A1 (en)
CN (1) CN102124294A (en)
BR (1) BRPI0914725A2 (en)
DE (1) DE112009001569T5 (en)
MX (1) MX2010014535A (en)
RU (1) RU2011102675A (en)
WO (1) WO2009156227A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102353271A (en) * 2011-10-19 2012-02-15 上海建丰重型机械有限公司 Novel grate type cooler
RU2558352C2 (en) * 2012-02-03 2015-08-10 Александр Владимирович Стопневич Cooler grate

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5977515B2 (en) * 2011-12-26 2016-08-24 川崎重工業株式会社 Cooling unit and cooler device including the same
CN108680033A (en) * 2018-08-10 2018-10-19 江西银杉白水泥有限公司 A kind of efficient white cement clinker grate-cooler

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006005997A1 (en) * 2004-07-02 2006-01-19 Flsmidth A/S Method and cooler for cooling hot particulate material

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
DE4004393A1 (en) * 1990-02-13 1991-08-14 Krupp Polysius Ag Cooling of hot layer in rotary-drum furnace - involves selective operation of magnetic valves directing forced air jets at grates which require additional cooling
DE4421552A1 (en) * 1994-01-24 1995-07-27 Krupp Polysius Ag Chill grate cooler
DE19502108A1 (en) * 1995-01-24 1996-07-25 Karl Von Wedel Bulk material e.g. cement clinker cooling process
JPH09241049A (en) * 1996-03-08 1997-09-16 Babcock Hitachi Kk Clinker cooling equipment
CN200944007Y (en) * 2006-04-14 2007-09-05 吴抵 Promoting beam fixed grate cooler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006005997A1 (en) * 2004-07-02 2006-01-19 Flsmidth A/S Method and cooler for cooling hot particulate material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102353271A (en) * 2011-10-19 2012-02-15 上海建丰重型机械有限公司 Novel grate type cooler
RU2558352C2 (en) * 2012-02-03 2015-08-10 Александр Владимирович Стопневич Cooler grate

Also Published As

Publication number Publication date
CN102124294A (en) 2011-07-13
BRPI0914725A2 (en) 2015-10-20
RU2011102675A (en) 2012-08-10
DE112009001569T5 (en) 2011-06-01
MX2010014535A (en) 2011-02-22
US20110146946A1 (en) 2011-06-23

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