US20070215732A1 - Milling apparatus - Google Patents

Milling apparatus Download PDF

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Publication number
US20070215732A1
US20070215732A1 US11/522,524 US52252406A US2007215732A1 US 20070215732 A1 US20070215732 A1 US 20070215732A1 US 52252406 A US52252406 A US 52252406A US 2007215732 A1 US2007215732 A1 US 2007215732A1
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United States
Prior art keywords
shaft
chamber
drum
drive
inlet
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Abandoned
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US11/522,524
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English (en)
Inventor
Bryan Geoffrey Black
Owen Ross Williams
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Individual
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Individual
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Publication date
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Publication of US20070215732A1 publication Critical patent/US20070215732A1/en
Priority to US12/705,394 priority Critical patent/US20100320300A1/en
Priority to US13/067,706 priority patent/US20110309175A1/en
Priority to US13/482,361 priority patent/US8888029B2/en
Abandoned 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
    • 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
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/005—Extraction of vapours or gases using vacuum or venting

Definitions

  • the present invention relates to milling apparatus.
  • the present invention in preferred forms relates to milling apparatus of a kind suitable for performing mechano-chemical or triboplasma reactions in respect of an infed solid material and/or optionally one or more reagents and/or catalysts.
  • the invention therefore extends to plant, procedures and products of such plant usage and such procedures.
  • the present invention has as one object, or an alternative object, better reactivity owing to preferably higher kinetic energies of the material impacting impact elements (usually balls) in the milling apparatus.
  • Another or alternative object is to effect mechano-chemical milling by the input of energy merely to rotate a substantially horizontally aligned agitation member or assembly.
  • Another or alternative object is to reduce energy inputs required for a materials through put.
  • agitators preferably separately fitted and sacrificial agitated forms
  • Such agitators can have a variety of different actions including flinging.
  • Such agitators also can be adapted to cause a gradual migration of solids material in a direction parallel to the rotational axis of the shaft thereby to maximise or increase dwell time in the milling apparatus between an inlet and an outlet.
  • a tower of a gang of separate milling apparatus that feed, preferably with the assistance of gravity, from one to the other, etc can have the individual milling apparatus quickly replaced.
  • the invention relates to a ready to go (preferably stack insertable) ball mill to operate with horizontally aligned shafted agitator forms (and preferably under the action of a shaft coupler).
  • the mill includes balls as impact elements.
  • the ball mill has a housing for the balls (or other impact elements) and a rotatable shaft through the housing on bearings to allow the shaft to be rotated, the shaft having agitator forms (e.g. flingers) carried thereon to rotate therewith.
  • agitator forms e.g. flingers
  • the agitator forms have sleeves to key to the shaft.
  • the shaft has a coupler to receive the complementary coupler of a drive.
  • the housing is cylindrical with ends, the ends having said bearings.
  • At least one inlet and at least one outlet to the housing Preferably there is at least one inlet and at least one outlet to the housing.
  • the milling is conducted with bells rather than deviations in shape therefrom (e.g. barrels).
  • the balls are a same initial size prior use.
  • that initial size is in the diameter range of from 5 to 40 mm (more preferably 8 to 25 mm and most preferably from about 12 mm to about 20 mm).
  • a coupler of a drive to couple to the shaft so as to drive, in use, the cradle mounted ball mill by rotating the coupled shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • a material feed inlet connectable to a material feed from above and/or a material outfeed to feed to below.
  • the milling is conducted with bells rather than deviations in shape therefrom (e.g. barrels).
  • the balls are a same initial size prior use.
  • that initial size is in the diameter range of from 5 to 40 mm (more preferably 8 to 25 mm and most preferably from about 12 mm to about 20 mm).
  • the invention is a combination as aforesaid in an operative form.
  • the combination includes ready for fitment a stand-by ready to go ball mill.
  • the present invention consists in milling apparatus comprising or including
  • agitators a shaft having a drive coupling and carrying agitator forms (“agitators”) to rotate with the shaft
  • drum drum or other chamber defining means
  • a support for the shafted drum which enables the drive via the coupled couplings to rotate at least the shaft and its agitators about the shaft axis when it is substantially horizontal
  • the impact elements e.g. ball, barrels, pins and/or the like masses.
  • the drum may rotate with the shaft.
  • the drum is not to be or is not in rotational synchrony with the shaft (i.e. preferably it is fixed (e.g. by ties, belts or the like) in a cradle that at least aligns the shaft.
  • the agitators are static forms carried by the shaft and may act to fling impact masses about within the drum.
  • a partition whereby impact elements to be retained can not access a said outlet but finer material(s) can.
  • the partition is a screen fixed or carried, or both, by one or other of the drum and the shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • the milling is conducted with bells rather than deviations in shape therefrom (e.g. barrels).
  • the balls are a same initial size prior use.
  • that initial size is in the diameter range of from 5 to 40 mm (more preferably 8 to 25 mm and most preferably from about 12 mm to about 20 mm).
  • the present invention consists in milling apparatus comprising or including
  • agitator forms (“agitators”) sleeved on the shaft to rotate with the shaft
  • drum drum or other chamber defining means
  • a support for the shafted drum which enables the drive via the coupled couplings to rotate at least the shaft and its agitators about the shaft axis when it is substantially horizontal
  • the impact elements e.g. ball, barrels, pins and/or the like masses.
  • the agitator forms sleeve with a sleeve providing opening correspondence to a non round sectioned part of the shaft so as to derive a rotational drive therefrom.
  • the drum may rotate with the shaft.
  • the drum is not to be or is not in rotational synchrony with the shaft (i.e. preferably it is fixed (e.g. by ties, belts or the like) in a cradle that at least aligns the shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • the agitators are static forms carried by the shaft and may act to fling impact masses about within the drum.
  • a partition whereby impact elements to be retained can not access a said outlet but finer material(s) can.
  • the partition is a screen fixed or carried, or both, by one or other of the drum and the shaft.
  • the milling is conducted with balls rather than deviations in shape therefrom (e.g. barrels).
  • the balls are a same initial size prior use.
  • that initial size is in the diameter range of from 5 to 40 mm (more preferably 8 to 25 mm and most preferably from about 12 mm to about 20 mm).
  • the present invention consists in horizontally shafted milling apparatus comprising or including
  • agitators a shaft having a drive coupling and carrying agitator forms (“agitators”) to rotate with the shaft
  • drum drum or other chamber defining means
  • a support for the shafted drum which enables the drive via the coupled couplings to rotate at least the shaft and its agitators about the shaft axis
  • the impact elements e.g. ball, barrels, pins and/or the like masses.
  • the milling is conducted with bells rather than deviations in shape therefrom (e.g. barrels).
  • the balls are a same initial size prior use.
  • that initial size is in the diameter range of from 5 to 40 mm (more preferably 8 to 25 mm and most preferably from about 12 mm to about 20 mm).
  • the present invention consists in milling apparatus comprising or including
  • agitators a shaft having a drive coupling and carrying agitator forms (“agitators”) to rotate with the shaft
  • drum drum or other chamber defining means
  • a support for the shafted drum which enables the drive via the coupled couplings to rotate at least the shaft and its agitators about the shaft axis
  • the impact elements e.g. ball, barrels, pins and/or the like masses.
  • the milling is conducted with balls rather than deviations in shape therefrom (e.g. barrels).
  • the balls are a same initial size prior use.
  • that initial size is in the diameter range of from 5 to 40 mm (more preferably 8 to 25 mm and most preferably from about 12 mm to about 20 mm).
  • the drum may rotate with the shaft.
  • the drum is not to be or is not in rotational synchrony with the shaft (i.e. preferably it is fixed (e.g. by ties, belts or the like) in a cradle that at least aligns the shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • the present invention consists in an assembly providing part or to provide parts of a milling apparatus comprising or including
  • agitators to rotate with the shaft
  • drum drum or other chamber defining means
  • the shaft preferably to be rotated substantially horizontally.
  • the drum may rotate with the shaft.
  • the drum is not to be or is not in rotational synchrony with the shaft (i.e. preferably it is fixed (e.g. by ties, belts or the like) in a cradle that at least aligns the shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • the agitators are static forms carried by the shaft and may act to fling impact masses about within the drum.
  • a partition whereby impact elements to be retained can not access a said outlet but finer material(s) can.
  • the partition is a screen fixed or carried, or both, by one or other of the drum and the shaft.
  • the present invention consists in milling apparatus comprising or including
  • agitators a shaft having a drive coupling and carrying agitator forms (“agitators”) to rotate with the shaft
  • drum drum or other chamber defining means
  • a support for the shafted drum which enables the drive via the coupled couplings to rotate at least the shaft and its agitators about the shaft axis
  • the impact elements e.g. ball, barrels, pins and/or the like masses.
  • the drum may rotate with the shaft.
  • the drum is not to be rotated or is not in rotational synchrony with the shaft (i.e. preferably it is fixed (e.g. by ties, belts or the like) in a cradle that at least aligns the shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • the agitators are static forms carried by the shaft and may act to fling impact masses about within the drum.
  • a partition whereby impact elements to be retained can not access a said outlet but finer material(s) can.
  • the partition is a screen fixed or carried, or both, by one or other of the drum and the shaft.
  • the milling is conducted with balls rather than deviations in shape therefrom (e.g. barrels).
  • the balls are a same initial size prior use.
  • that initial size is in the diameter range of from 5 to 40 mm (more preferably 8 to 25 mm and most preferably from about 12 mm to about 20 mm).
  • a coupler of a drive to couple to the shaft so as to drive, in use, the cradle mounted ball mill by rotating the coupled shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • a material feed inlet connectable to a material feed from above and/or a material outfeed to feed to below.
  • the invention is a combination as aforesaid in an operative form
  • the combination includes ready for fitment a stand-by ready to go ball mill.
  • the present invention consists, in a gang of milling apparatus where at least one feeds material to another, milling apparatus comprising or including
  • agitators a shaft having a drive coupling and carrying agitator forms (“agitators”) to rotate with the shaft
  • drum drum or other chamber defining means
  • the impact elements e.g. ball, barrels, pins and/or the like masses.
  • the drum may rotate with the shaft.
  • the drum is not to be or is not in rotational synchrony with the shaft (i.e. preferably it is fixed (e.g. by ties, belts or the like) in a cradle that at least aligns the shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • the gang of milling apparatus or plurality of shafted chambers/drums has one or more of:
  • the milling is conducted with balls rather than deviations in shape therefrom (e.g. barrels).
  • the balls are a same initial size prior use.
  • that initial size is in the diameter range of from 5 to 40 mm (more preferably 8 to 25 mm and most preferably from about 12 mm to about 20 mm).
  • the invention is milling apparatus comprising or including
  • each shafted chamber containing impact masses capable of being energised by agitator formations carried by each shaft when rotated, each chamber having an inlet and an outlet, and
  • an inlet of a first said chamber can receive a solids stream and its outlet can discharge to an inlet of a second said chamber and the outlet of that second chamber can discharge either (I) for harvesting the out put or (II) to an inlet of a third said chamber, etc.
  • the drum may rotate with the shaft.
  • the drum is not to be or is not in rotational synchrony with the shaft (i.e. preferably it is fixed (e.g. by ties, belts or the like) in a cradle that at least aligns the shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • the plurality of shafted chambers/drums has one or more of:
  • the milling is conducted with balls rather than deviations in shape therefrom (e.g. barrels).
  • the balls are a same initial size prior use.
  • that initial size is in the diameter range of from 5 to 40 mm (more preferably 8 to 25 mm and most preferably from about 12 mm to about 20 mm).
  • a coupler of a drive to couple to the shaft so as to drive, in use, the cradle mounted ball mill by rotating the coupled shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • a material feed inlet connectable to a material feed from above and/or a material outfeed to feed to below.
  • the invention is a combination as aforesaid in an operative form.
  • the combination includes ready for fitment a stand-by ready to go ball mill.
  • the invention is milling apparatus comprising or including
  • each shafted chamber of impact masses capable of being energised by agitator formations carried by each shaft when rotated, each chamber having an inlet and an outlet, and
  • an inlet of a first said chamber can receive a solids stream and its outlet can discharge to an inlet of a second said chamber and the outlet of that second chamber can discharge either (I) for harvesting the out put or (II) to an inlet of a third said chamber, etc.
  • the ganged drive is by belt or other flexible drive to each shaft.
  • the drum may rotate with the shaft.
  • the drum is not to be rotated or is not in rotational synchrony with the shaft (i.e. preferably it is fixed (e.g. by ties, belts or the like) in a cradle that at least aligns the shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • each shaft can be disconnected for removal (preferably with its chamber) from the drive input to each shaft.
  • the gang of shafted chambers/drums has one or more of:
  • the milling is conducted with balls rather than deviations in shape therefrom (e.g. barrels).
  • the balls are a same initial size prior use.
  • that initial size is in the diameter range of from 5 to 40 mm (more preferably 8 to 25 mm and most preferably from about 12 mm to about 20 mm).
  • a coupler of a drive to couple to the shaft so as to drive, in use, the cradle mounted ball mill by rotating the coupled shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • a material feed inlet connectable to a material feed from above and/or a material outfeed to feed to below.
  • the invention is a combination as aforesaid in an operative form.
  • the combination includes ready for fitment a stand-by ready to go ball mill.
  • the invention is milling apparatus comprising or including
  • each chamber having an inlet and an outlet, and
  • an inlet of a first said chamber can receive a solids stream and its outlet can discharge to an inlet of a second said chamber and the outlet of that second chamber can discharge either (I) for harvesting the out put or (II) to an inlet of a third said chamber, etc,
  • each shaft can be disconnected for removal (preferably with its chamber) from its drive input.
  • the drum may rotate with the shaft.
  • the drum is not to be or is not in rotational synchrony with the shaft (i.e. preferably it is fixed (e.g. by ties, belts or the like) in a cradle that at least aligns the shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • the gang of milling apparatus or plurality of shafted chambers/drums has one or more of:
  • a coupler of a drive to couple to the shaft so as to drive, in use, the cradle mounted ball mill by rotating the coupled shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • a material feed inlet connectable to a material feed from above and/or a material outfeed to feed to below.
  • the invention is a combination as aforesaid in an operative form.
  • the combination includes ready for fitment a stand-by ready to go ball mill.
  • the invention is milling apparatus comprising or including
  • each shafted chamber of impact masses capable of being energised by agitator formations carried by each shaft when rotated, each chamber having an inlet and an outlet, and
  • an inlet of a first said chamber can receive a solids stream and its outlet can discharge to an inlet of a second said chamber and the outlet of that second chamber can discharge either (I) for harvesting the out put or (II) to an inlet of a third said chamber, etc,
  • each shafted chamber as a unit can be replaced by uncradling and/or disconnection from its drive input.
  • the gang of milling apparatus or plurality of shafted chambers/drums has one or more of:
  • a coupler of a drive to couple to the shaft so as to drive, in use, the cradle mounted ball mill by rotating the coupled shaft.
  • said drive can be operated or configured to allow rotation in either direction.
  • a material feed inlet connectable to a material feed from above and/or a material outfeed to feed to below.
  • the invention is a combination as aforesaid in an operative form.
  • the combination includes ready for fitment a stand-by ready to go ball mill.
  • the invention is a method of reducing the level of at least one organo-halogen compound in and/or on a matrix which comprises or involves milling at least the matrix with said at least one organo-halogen compound in milling apparatus in any one or more of the aspects aforesaid.
  • the ball mill operation is such that a temperature of at least substantially 70° C. is generated in the ball mill mix.
  • the matrix can be all of, or a sized stream of, organo-halogen contaminated earth, soil, clay and/or rock pieces.
  • the matrix has been dried prior to milling.
  • Such drying is preferably at less than 60° C. in a drier at less than 125° C.
  • the matrix has not been washed prior to milling.
  • the invention is method of reducing the halo-organic content of a contaminated ground site which comprises or includes the steps of
  • the more contaminated smaller particle size stream may have an average particle size of 10 mm or less.
  • the smaller particle size stream may be derived by one or both of screening and/or identification the media as clay.
  • the milling is to submicron sizes.
  • At least the more contaminated smaller particle size stream may have been subjected to a drying procedure prior to milling.
  • the drying has been of an unwashed solids stream.
  • Reactive agent or agents are preferably used in at least some of the milling.
  • the suitable reactive agent(s) and the milled materials are at least primarily solids e.g. quartz sand and the soil.
  • the milling is with a ball mill of the present invention.
  • the blend is preferably used for site reinstatement.
  • the present invention consists in a method of remediating a chemically contaminated matrix, said method comprising the steps of
  • Preferably matrix itself or any solids stream thereof is not subjected to washing.
  • the milling involves one or more reagent (e.g. quartz sand) and optionally any catalyst that may be considered desirable.
  • reagent e.g. quartz sand
  • the milling apparatus involves balls and preferably those balls are of steel but they can be of any other suitable impact material.
  • the milling apparatus is confined so as to reduce noise levels (e.g. in a transport container e.g. a 20 foot ISO container).
  • an inert gas or an oxygen low gas can be provided as the environment for the milling apparatus (e.g. by a nitrogen infusion).
  • a rotary drier is used to ensure the dryness of the matrix.
  • the present invention consists in the use of milling apparatus of any of the kinds previously described as the present invention.
  • the invention is a procedure for remediating soil by subjecting a substantially dry solids stream of the soil or a partitioned amount thereof, to milling so as to dislocate-Si—O— bonds of the soil and/or any added quartz or the like material(s) thereby to facilitate and/or cause breakdown of organohalogen content(s), the milling being in a horizontally shafted ball mill where the shaft has or carries ball agitator forms.
  • the milled materials may then be blended (e.g. with an oversize material as in the aforementioned specifications).
  • the present invention consists in plant for remediating a matrix, said plant including milling apparatus of any aspect of the present invention.
  • the present invention consists the solids outfeed of a procedure or method as aforesaid.
  • ball speeds can be up to 20 metres/per sec and are at least 2 metres/per sec over part of each agitation.
  • the output product is submicron prior to any pugmil or other glomeration or blended remediation of the milled output.
  • This invention may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more of said parts, elements or features, and where specific integers are mentioned herein which have known equivalents in the art to which this invention relates, such known equivalents are deemed to be incorporated herein as if individually set forth.
  • FIG. 1 show a plant schematic suitable for treating a matrix that is a contaminated soil stockpile, the solid arrows showing the soil flow,
  • FIG. 1A shows the flow of the plant of FIG. 1 .
  • FIG. 2 is a perspective view of a gang of shafted chambers in accordance with the present invention each operating as a milling apparatus (the balls or other impact elements not being shown) under the operation of a preferred gang drive and within a sound suppressing containment enclosure,
  • FIG. 3 is a closer detail of a soil and reagent feed hopper each with separate auger feed into the top most shafted chamber
  • FIG. 4 is a close up of a shafted chamber showing a top feed point at or adjacent one end and an outlet at the other end from whence there can be a feed down to a feed in part of a reversed but preferably in line milling apparatus of the same kind thereby to reverse the flow direction as the chambers alternate, thereby reducing the footprint of the plant,
  • FIG. 5 is a perspective view of the apparatus of FIG. 2 showing the drive pulleys preferred in conjunction with an electric motor, the gang of shafted chambers being supported from a tower frame,
  • FIG. 6 is a closer view of two proximate parts of the gang shown in FIG. 5 .
  • FIG. 7 is a diagrammatic section of apparatus of the present invention (not showing the balls for clarity, the balls (e.g. of a size mentioned in the previously mentioned specifications) being at least to about the shaft level when static,
  • FIG. 8 is a ready to go milling apparatus of a kind coupled in FIG. 7 .
  • FIG. 9 shows the cradle and drive coupler that remains when the apparatus of FIG. 8 has been removed
  • FIG. 10 shows the couplet in section (e.g. ATRA-FLEXTM flexible coupling available in New Zealand—www.johnbrooks.co.nz/couplingshtm, and
  • FIG. 11 shows a flow diagram of a heavy metal stabilising regime for milled soils that can extend the value of the milling to reduce organic contamination.
  • a shafted chamber 1 is defined by end plates 2 and 3 of a cylindrical containment 5 for the balls and media.
  • the plates carry there through a shaft 4 .
  • a bearing support 5 for the shaft 4 from one (and preferably each) end plate.
  • the drum like surround 5 is preferably provided with a flange connectable feed port 6 on the top at one end and a discharge 7 via the plate at the other end.
  • a downwardly directed flanged outlet could be provided from at or adjacent the region 8 .
  • a plurality of staggered forms 9 are positioned to rotate in unison with the shaft 4 as it is rotated. This has the effect of agitating the balls (not shown) which partly fill the containment area of the chamber.
  • FIG. 2 shows a series of 4 shafted chambers driven under a ganged drive of belts or other flexible drives whereby, if desired, a nitrogen or other inert gas supply 15 can provide for an inert atmosphere in each of the chambers.
  • hoppers 11 and 12 can feed via augers 13 and 14 respectively into an inlet 6 of a top most shafted chamber 6 as shown.
  • the milled or being milled material(s) then passes down via the lower shafted chambers prior to the dumping from the lower most shafted chamber 16 into a pugmill 17 where the materials are, at least to some extent, agglomerated under the action of a water infeed 18 .
  • the pugmill arrangement at the bottom of the tower has the purpose of treating/processing the soil that has been subjected to the milling action of the gang of ball agitating shafted chambers and any reagents deemed desirable.
  • FIG. 5 shows the arrangement of FIG. 2 where an electric motor 19 drives a drive pulley to be linked to each of the driven pulleys 21 .
  • a feature of the arrangement as described is the ability for a sound suppressing confinement 25 by a transportation container about the tower structure 26 of FIG. 5 to keep noise levels generally low while still providing an outlet from the enclosure 25 .
  • FIG. 1 there is a flow through of the soil stockpile through preferably a rotary drier and from thence up a feed to the hopper 11 at which stage any reagents can be mixed therewith at the entry into the topmost shafted chamber 6 .
  • each impact/flinger form on a shaft is cast or fabricated (for example with a hexagonal, square or octagonal sleeve) to be sleeved in a non rotatory manner on the shaft 4 so that the stagger between such elements as shown in FIG. 4 is perpetuated irrespective of rotational use and rotational direction.
  • Reverse driving can double impact form life.
  • Operation of the plant can be by any of the methods and procedures described in the aforementioned patent specifications; it can alternatively be a reagentless milling or can involve reagents, e.g. quartz and any optional catalyst.
  • reagents e.g. quartz and any optional catalyst.
  • the important feature is to monitor this through put so that it is appropriate that where reagents are required, they are in fact used to ensure the desired monitored outcome.
  • FIGS. 7 through 9 show in stylised section firstly the assembly as in a stack with a cradle 27 having belted thereto (steel belting 28 ) between guides 29 of the chamber or drum 30 thereby to stabilize the same with the shaft 31 aligned appropriately for coupling by its coupler 32 to the coupler 33 on the pulley shaft of the drive arrangement 34 shown.
  • Shaft 31 is preferably hexagonal inside hexagonal sleeves of each impactor/flinger form 35 and is bearing mounted at 36 and 37 in plates 38 and 39 .
  • FIG. 8 shows the removable milling unit that is ready to go (showing only one ball 40 of the many balls to be therein) whilst FIG. 9 shows the residue of the mount and drive after removal of that part shown in FIG. 8 from the assembly shown in FIG. 7 .
  • milled materials have a final particle size of less than 100 microns, preferably very much less e.g. sub 1 micron.
  • FIG. 11 shows the soil remediation flow as preferred in the remediation process subject to our patent application filed simultaneously herewith.
  • the blending e.g. in a concrete type mixer or other
  • FIG. 11 as a flow diagram shows a preferred flow diagram where a contaminated soil stockpile 41 is fed as an infeed into a hopper 42 and from thence to a conveyor 43 .
  • the contaminated soil is then passed into a rotary drier or other drier 44 from whence it is passed via a trommel 45 as an oversize stream to an oversize stockpile 46 .
  • the non oversize stream is separated two ways with fines passing into a fines silo 47 and coarser materials into a coarse silo 48 .
  • Dust and vapours of the drier 44 pass through a bag house 49 and, after off gas treatment at 50 , there is venting to atmosphere. Moreover recovered fines at the bag house 49 are fed to the fines silo 47 .
  • the fines and coarse streams of 47 and 48 respectively are fed with milling reagents in hopper 51 into the milling apparatus 52 which preferably is a stack of “ready to go” mills (collectively as a “reactor”) as previously stated.
  • This reactor is to be known as a Series III MCDTM reactor. It feeds the milled materials to a mixer 53 into which is added the stabilising agents from a hopper feed 54 .
  • the output from the mixer 53 then passes via a plug mill 55 thereby to provide a treated soil stockpile 56 .
  • Materials of the oversize stockpile 46 that have not been milled and the (usually submicron) materials of the treated soil stockpile 56 can then be blended by any appropriate mixing (e.g. a concrete mixer or otherwise) to provide a reconstituted soil stockpile or the equivalent 57 .
  • metal values in their existing, but usually a different form can be stabilised with a choice of appropriate stabilising agents in hopper 54 .
  • Such stabilization preferably reduces leaching by virtue of the metal values being held physically and/or preferably in an insoluble form.
  • the present invention provides alternative to existing procedures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Crushing And Grinding (AREA)
  • Processing Of Solid Wastes (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Pulverization Processes (AREA)
US11/522,524 2006-03-15 2006-09-18 Milling apparatus Abandoned US20070215732A1 (en)

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US12/705,394 US20100320300A1 (en) 2006-03-15 2010-02-12 Milling apparatus
US13/067,706 US20110309175A1 (en) 2006-03-15 2011-06-21 Milling apparatus
US13/482,361 US8888029B2 (en) 2006-03-15 2012-05-29 Milling apparatus

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NZ545960 2006-03-15
NZ545960A NZ545960A (en) 2006-03-15 2006-03-15 Milling apparatus

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US11/522,524 Abandoned US20070215732A1 (en) 2006-03-15 2006-09-18 Milling apparatus
US12/705,394 Abandoned US20100320300A1 (en) 2006-03-15 2010-02-12 Milling apparatus
US13/067,706 Abandoned US20110309175A1 (en) 2006-03-15 2011-06-21 Milling apparatus
US13/482,361 Active US8888029B2 (en) 2006-03-15 2012-05-29 Milling apparatus

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US12/705,394 Abandoned US20100320300A1 (en) 2006-03-15 2010-02-12 Milling apparatus
US13/067,706 Abandoned US20110309175A1 (en) 2006-03-15 2011-06-21 Milling apparatus
US13/482,361 Active US8888029B2 (en) 2006-03-15 2012-05-29 Milling apparatus

Country Status (13)

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US (4) US20070215732A1 (de)
EP (1) EP1993734B1 (de)
JP (2) JP5596339B2 (de)
CN (1) CN101410185B (de)
AU (1) AU2007225516B2 (de)
CA (1) CA2646475C (de)
DK (1) DK1993734T5 (de)
ES (1) ES2622829T3 (de)
MY (1) MY148467A (de)
NZ (1) NZ545960A (de)
PL (1) PL1993734T3 (de)
WO (1) WO2007105972A1 (de)
ZA (1) ZA200807884B (de)

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JP5801788B2 (ja) 2015-10-28
CN101410185B (zh) 2010-06-16
US20110309175A1 (en) 2011-12-22
EP1993734A1 (de) 2008-11-26
MY148467A (en) 2013-04-30
US8888029B2 (en) 2014-11-18
ZA200807884B (en) 2009-09-30
NZ545960A (en) 2008-04-30
EP1993734A4 (de) 2013-01-23
CA2646475A1 (en) 2007-09-20
US20130099033A1 (en) 2013-04-25
AU2007225516A1 (en) 2007-09-20
DK1993734T5 (en) 2017-06-06
CN101410185A (zh) 2009-04-15
JP5596339B2 (ja) 2014-09-24
JP2013066891A (ja) 2013-04-18
PL1993734T3 (pl) 2017-10-31
WO2007105972A1 (en) 2007-09-20
WO2007105972A8 (en) 2007-11-08
CA2646475C (en) 2015-04-28
JP2009530078A (ja) 2009-08-27
US20100320300A1 (en) 2010-12-23
DK1993734T3 (en) 2017-05-22
ES2622829T3 (es) 2017-07-07
AU2007225516B2 (en) 2010-10-21

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