US3881664A - Wear plate in an apparatus for conditioning a granular material - Google Patents
Wear plate in an apparatus for conditioning a granular material Download PDFInfo
- Publication number
- US3881664A US3881664A US328171A US32817173A US3881664A US 3881664 A US3881664 A US 3881664A US 328171 A US328171 A US 328171A US 32817173 A US32817173 A US 32817173A US 3881664 A US3881664 A US 3881664A
- Authority
- US
- United States
- Prior art keywords
- wall
- impact surface
- impact
- walls
- larger end
- 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.)
- Expired - Lifetime
Links
- 239000008187 granular material Substances 0.000 title claims description 6
- 230000003750 conditioning effect Effects 0.000 title description 6
- 239000000463 material Substances 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000006872 improvement Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 30
- 239000004576 sand Substances 0.000 description 23
- 235000013339 cereals Nutrition 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 230000001143 conditioned effect Effects 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000009991 scouring Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003110 molding sand Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Chemical compound CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S241/00—Solid material comminution or disintegration
- Y10S241/10—Foundry sand treatment
Definitions
- ABSTRACT A centrifugal throwing wheel projects the material radially against an impact surface which completely surrounds and is spaced from the periphery of the wheel,
- the impact surface comprises a plurality of wear plates or walls spaced from a central axis.
- Each wall is shaped like a frustrum with one end having a larger opening than the other end.
- This invention relates to apparatus for conditioning granular material. especially sand for reclamation.
- Reconditioning of used sand involves reducing used core elements and molded sand lumps into individual grains.
- the quality of reclaimed sand must be comparable to that of new sand so that it may be satisfactorily substituted for new sand in core and molding sand mixtures Thus. it is usually necessary to remove accumulated coatings from around individual sand grains.
- the accumulated coatings may be inorgaic. such as clay minerals for grain molding sand. organics such as pitch. cereals and resins. or combinations such as clay used in conjunction with sea coal. pitch and cereals.
- Reclamation systems of the prior art have generally crushed lumps of molded sand in a hammermill. ring crusher. jaw or roll crusher.
- the coatings on the sand grains are then removed by one of several methods known in the prior art.
- the wet method of reclamation consists of mixing the sand with water with a mechanical scrubbing action. A considerable portion of the coating on the sand grains may be removed depending upon the efficiency of the scrubbing and the type of coating.
- the thermal method of reclamation the sand is heated at a temperature of about l.200F. to about l.500(lF. This treatment completely removes the carbonaceous matter. ln another method.
- pnuematic sand scrubbers utilize low pressure air to make used sand grains 'sandblast each other.
- the disadvantages of this latter system are the high power requirements necessary" to generate the high velocity air stream and the necessity for having the sand in a freeflow condition. To a certain extent. these disadvantages have been corrected by methods described in a Brithish patent specification No. 1.195.226. A method for removing coatings on sand is described wherein the sand is thrown against a target by a mechanical throwing means with sufficient force to free contaminants from the particles of sand.
- this latter system does not effectively minimize power requirements of achieve adquate removal of contaminants from the conditioned particles.
- an impact surface for use in an apparatus of the type having a centrifugal throwing wheel mounted for rotation and adapted to project a stream of material against the impact surface.
- said impact surface comprising a closed wall spaced from a central axis and shaped like a frustrum with one end having a larger opening than the other end.
- an impact surface comprising a first. second and third closed wall. each wall being spaced from a central axis and shaped like a frustrum with one end being larger than the other end. said first. second and third walls being in coaxial stacked relationship.
- the wear surface or impact plate provided by the present invention has a geometric shape which provides for a maximum mix ing of projected particles to obtain a good scouring action and at the same time provides a structure that is readily replaceable.
- FIG. 1 is a side elevational view in section of an apparatus for conditioning granular material
- FIG. 2 is an end elevational view along line 2-2 of FIG. 1;
- FIG. 3 is an end elevational view similar to the view of FIG. 2 showing another configuration of wear plates
- FIG. 4 is a sectional view along line 4-4 of FIG. 3;
- FIG. 5 is an end elevational view similar to the view of FIG. 2 showing another configuration of wear plates.
- FIG. 6 is a sectional view along line 66 of FIG. 5.
- the conditioner 11 subjects the sand in the mixture to a scouring treatment thereby removing accumulated coatings.
- the conditioner 11 includes an outer housing which is cylindirically shaped with a conical bottom 17.
- the side walls 15 of the housing are radially spaced from central axis 19.
- the passage 13 can serve as an inlet conduit for the input of material to be conditioned.
- the inlet conduit or passage 13 is in the top portion of the housing.
- An outlet conduit 21 is connected to the conical bottom 17 for the output of conditioned sand.
- the inlet conduit 13 and the outlet conduit 21 are coaxial with the central axis 19 of the housing.
- the conditioner I1 When in operation. the conditioner I1 is placed so that the central axis 19 is vertically aligned so that the material to be treated falls through the inlet conduit 13 and exist via the outlet conduit 21.
- a centrifugal throwing wheel 23 is disposed intermediate the inlet conduit 13 and the outlet conduit 21.
- the throwing wheel 23 has an axis of rotation coaxial with the axis 19 and is disposed in the path of feed material falling through the inlet conduit 13. The feed material passing through the conduit 13 is projected radially outwardly by the throwing wheel 23.
- the throwing wheel 23 includes a runnerhead 25 with a plurality of radially directed vanes 27.
- a distribution head 29 is cone shaped with the base of the cone contacting the central portion of the runnerhead 25 in the space in the center of the throwing wheel 23 between the vanes 27.
- the runnerhead 25 is removably journaled on a spindle 31 and includes a square axially aligned opening which matches the similarly shaped end of the spindle 31 so as to provide a positive drive engagement.
- the distribution cone or head 29 is secured by bolting in place at the end of the spindle 31. This attachment also serves to keep the throwing wheel 23 in place.
- the spindle 31 is axially aligned and mounted between spaced bearings for rotation.
- a pulley at the lower end thereof is driven by an endless belt 33 which is trained around another pulley which is connected to the shaft of a motor 35.
- the motor 35 is mounted exterior to the housing by suitable bracket.
- the feed material is projected radially outwardly from the axis of rotation of the throwing wheel 23 so as to give a 360coverage of project particles.
- An impact surface 37 is radially spaced from the axis of rotation of the throwing wheel 23. From a top view the impact surface 37 as illustrated in FIG. 2 is circular in shape so that the thrown particles travel a given distance before striking the impact surface 37.
- the impact surface 37 as illustrated in detail in FIG. 4 and 6 has a cross section which is shaped like a tilted U-shaped channel member.
- the impact surface 37 includes an impact plate or wear plate or wall 39 which is directed directly in the path of the projected particles and angularly disposed, preferably at about 45angle so as to direct the projected particles upwardly after rebounding.
- a ricochet plate or wall 41 is connected to the impact plate or wall 39 at an angle, preferably about 90angle thereto, so as to deflect rebounding particles from the impact plate 39 back toward the throwing wheel.
- a second ricochet plate or wall 43 is connected to and at about 90angle to the first ricochet plate 41.
- the second ricochet plate or wall 43 deflects particles downwardly toward the blast stream eminating from the centrifugal throwing wheel 23. This path is shown in FIG. 1 by a dotted line having arrows. The path is such that the collisions of the particles are maximized so that a scoured action is achieved. The particles fall into the conical bottom 17 where they exit via the conduit 21.
- the impact surface 37 is rigidly mounted in place to an inner wall 45.
- the inner wall 45 is connected with the outer wall 15 so as to form an inner chamber 47 and an outer chamber 49.
- Each wear plate or wall 39, 41 or 43 is a closed or continuous wall having a central axis.
- the wall 39, 41 or 43 is arcuate in shape and is generated by rotating a line at an angle to the central axis about the central axis. If the wall 39, 41 or 43 is not arcuate preferably the general shape approaches that of a circle. In this latter case. the wall 39, 41 or 43 preferably has at least about three straight sides symmetrically arranged about the central axis. In this case. the side portions of each wall 39, 41 or 43 are at an angle to the central axis to give a resulting pyramidal shape.
- the general shape of a wall 39, 41 or 43 is that of a frustrum with two parallel planes intersecting the pyramid or cone shaped sides. Both ends of a wall 39,
- Each plate or wall 39, 41 or 43 is preferably at an angle of about 45 with respect to the central axis. It has been found that this angle maximizes the scouring action.
- the walls 39, 41 and 43 are stacked so that the impact plate or wall 39 has its larger end facing upwardly so as to project rebounding particles in that direction.
- the first ricochet plate or wall 41 has its larger end facing downwardly and engaging the larger end of the impact plaate 39. This construction results in the particles being deflected back toward the centrifugal throwing wheel 23.
- the second ricochet plate 43 has its larger end facing upwardly and engaging the smaller end of the first ricochet plate 41 so that the rebounding particles are projected downwardly through the blast stream.
- the weight of the plates 39, 41 or 43 which are generally made from steel or other ferrous alloy is sufficient to hold the plates in position.
- a peripheral flange 53 is provided at the larger end of the impact plate 39 for engaging the larger end of the first ricochet plate 41.
- a peripheral flange 55 is provided at the larger end of the second ricochet plate 43 for overlapping the smaller end of the first ricochet plate 41. The flanges 53 and 55 aid in obtaining the proper alignment of the plates 39, 41 and 43 when they are installed in the conditioner 11.
- the particles projected from the throwing wheel 23 are immediately subjected to an air stream which flows through the projected and falling particles.
- the air stream flows through an opening 57 in the top of the conditioner l1 and follows the path of the solid lines with arrows as illustrated in FIG. 1.
- the air stream flows through the inner chamber 47 and downwardly through the projected particles and upwardly toward the outer chamber 49.
- the air stream is drawn through the outer chamber 49 to an outlet 59 or several outlets which can be employed to evenly distribute the air flow.
- the outlet 59 is connected to a low pressure source and a dust collector (not shown).
- the ligher particles such as dust or fines which are airborne are drawn through the outlet 59 and into the dust collector. The heavier particles continue to fall toward the bottom of the conditioner 11 or to be projected against the impact surface 37.
- the height of the impact plate 39 or the first and second ricochet plates 41 and 43 is measured along the central axis between the base and the intersecting plane of the frustrum forming the sides of the respective plate 39 or first and second ricochet plates 41 and 43.
- the height of the plate 39 be at least equal to the width of the blast stream of projected particles.
- the height of the first ricochet plate 41 and second ricochet plate 43 should approximate the height of the impact plate 39 to obtain a proper rebounding action.
- the distance from the central axis to the inside surface of the impact plate 39 at the larger end thereof should be at least about three times the height, and preferably at least about five times the height. This relationship holds true for the first ricochet plate or wall 41.
- the inside surface of the wall at the smaller end be one less height measurement than the impact plate or wall so that the particles are deflected downwardly passed the impact plate or wall 39.
- FIGS. 3 and 5 illustrated impact surfaces having 5 and 6 segments, respectively. Such configurations permit the ready replacement of a single segment of a given wall. thus allowing rapid and economical repair of an unevely worn or otherwise damaged wall.
- said impact surface comprising a first. second and third closed wall. each wall being spaced from a central axis and shaped like a frustrum with one end being larger than the other end. said first. second and third walls being in coaxial loosely stacked relationship. said first wall having its larger end facing upwardly. said second wall having its larger end facing downwardly. and said third wall having its larger end facing upwardly.
- An impact surface according to claim 1 wherein said apparatus is of the type having a centrifugal throwing wheel mounted for rotation about a vertical axis for projecting a stream material in a 360 arc. and wherein said first. second and third walls are coaxially aligned with the axis of rotation of said centrifugal throwing wheel.
- each of said walls forms an angle of about 45 with respect to the central axis.
- each of said first. second and third walls comprises a plurality of segments symmetrically arranged about the central axis.
- An impact member for use in an apparatus of the type having a centrifugal throwing wheel mounted for rotation and adapted to project granular material against said impact member, said impact member comprising a series of separate plate members loosely stacked in superposed cooperative relationship. said series of separate plate members comprising an impact plate and at least a first ricochet plate. the improvement comprising said ricochet plate being separate from said impact plate for providing ready replacement of one of said separate plate members without necessarily replacing the other.
Abstract
Description
Claims (11)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US328171A US3881664A (en) | 1973-01-31 | 1973-01-31 | Wear plate in an apparatus for conditioning a granular material |
DE2404000A DE2404000C2 (en) | 1973-01-31 | 1974-01-29 | Device for processing used foundry sand |
IT48013/74A IT1008171B (en) | 1973-01-31 | 1974-01-29 | DEVICE FOR THE RECOVERY OF SAND FROM THE FOUNDRY |
GB395874A GB1461164A (en) | 1973-01-31 | 1974-01-29 | Wear plate in an apparatus for conditioning a granular material |
JP49011944A JPS5817661B2 (en) | 1973-01-31 | 1974-01-30 | Renewal of the situation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US328171A US3881664A (en) | 1973-01-31 | 1973-01-31 | Wear plate in an apparatus for conditioning a granular material |
Publications (1)
Publication Number | Publication Date |
---|---|
US3881664A true US3881664A (en) | 1975-05-06 |
Family
ID=23279817
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US328171A Expired - Lifetime US3881664A (en) | 1973-01-31 | 1973-01-31 | Wear plate in an apparatus for conditioning a granular material |
Country Status (5)
Country | Link |
---|---|
US (1) | US3881664A (en) |
JP (1) | JPS5817661B2 (en) |
DE (1) | DE2404000C2 (en) |
GB (1) | GB1461164A (en) |
IT (1) | IT1008171B (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3995784A (en) * | 1975-03-21 | 1976-12-07 | Consejo Nacional De Ciencia Y Tecnologia | Rotary mill for micronic grinding |
US4470551A (en) * | 1981-02-09 | 1984-09-11 | Garland Paul A | Machine for comminuting materials |
US4739937A (en) * | 1985-08-19 | 1988-04-26 | Pangborn Corporation | Apparatus for conditioning granular material |
US4921173A (en) * | 1985-09-17 | 1990-05-01 | Bartley Bryan A | Methods of mineral breaking and apparatus used therefor |
US5029761A (en) * | 1989-11-30 | 1991-07-09 | Nordberg Inc. | Liner wear insert for vertical shaft impactor rotor |
EP0455023A1 (en) * | 1990-05-04 | 1991-11-06 | F.B. LEHMANN Maschinenfabrik GmbH | Impact mill, especially for cocoa beans |
DE9309448U1 (en) * | 1993-06-25 | 1994-11-03 | Bauermeister & Co Verfahrenste | Impact mill for oily seeds, in particular cocoa seeds |
US5366170A (en) * | 1993-09-17 | 1994-11-22 | John B. Jones, Jr. | Vertical shaft processor including an improved removal grate |
US5439044A (en) * | 1992-04-10 | 1995-08-08 | Boenisch; Dietmar | Method of regenerating foundry sand |
US20060011762A1 (en) * | 2002-08-28 | 2006-01-19 | Sandvik Intellectual Property Hb | Wear part for a crusher |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5420919A (en) * | 1977-07-15 | 1979-02-16 | Toyo Kootetsudo Sando Kk | Regeneratin of casting sand for shell mold |
JPS5429828A (en) * | 1977-08-10 | 1979-03-06 | Toyo Kootetsudo Sando Kk | Method of making dry casting sand |
JPS62163737A (en) * | 1986-01-14 | 1987-07-20 | Kawasaki Heavy Ind Ltd | Particle shape regulator |
US10739053B2 (en) * | 2017-11-13 | 2020-08-11 | Whirlpool Corporation | Ice-making appliance |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2707314A (en) * | 1951-10-23 | 1955-05-03 | Simpson Herbert Corp | Method of reclaiming granular material |
US2992784A (en) * | 1959-02-24 | 1961-07-18 | Simplicity Eng Co | Bowl liners for crushers |
US2992783A (en) * | 1959-02-03 | 1961-07-18 | Simplicity Eng Co | Crusher apparatus and methods of crushing aggregates |
US3782643A (en) * | 1971-01-21 | 1974-01-01 | Carborundum Co | Apparatus for conditioning a granular material |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3716947A (en) * | 1971-01-21 | 1973-02-20 | Carborundum Co | Abrasive blast cleaning system |
JPS5525945A (en) * | 1978-08-15 | 1980-02-25 | Tokyo Shibaura Electric Co | Device for operating switch |
-
1973
- 1973-01-31 US US328171A patent/US3881664A/en not_active Expired - Lifetime
-
1974
- 1974-01-29 IT IT48013/74A patent/IT1008171B/en active
- 1974-01-29 DE DE2404000A patent/DE2404000C2/en not_active Expired
- 1974-01-29 GB GB395874A patent/GB1461164A/en not_active Expired
- 1974-01-30 JP JP49011944A patent/JPS5817661B2/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2707314A (en) * | 1951-10-23 | 1955-05-03 | Simpson Herbert Corp | Method of reclaiming granular material |
US2992783A (en) * | 1959-02-03 | 1961-07-18 | Simplicity Eng Co | Crusher apparatus and methods of crushing aggregates |
US2992784A (en) * | 1959-02-24 | 1961-07-18 | Simplicity Eng Co | Bowl liners for crushers |
US3782643A (en) * | 1971-01-21 | 1974-01-01 | Carborundum Co | Apparatus for conditioning a granular material |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3995784A (en) * | 1975-03-21 | 1976-12-07 | Consejo Nacional De Ciencia Y Tecnologia | Rotary mill for micronic grinding |
US4470551A (en) * | 1981-02-09 | 1984-09-11 | Garland Paul A | Machine for comminuting materials |
US4739937A (en) * | 1985-08-19 | 1988-04-26 | Pangborn Corporation | Apparatus for conditioning granular material |
US4921173A (en) * | 1985-09-17 | 1990-05-01 | Bartley Bryan A | Methods of mineral breaking and apparatus used therefor |
US5029761A (en) * | 1989-11-30 | 1991-07-09 | Nordberg Inc. | Liner wear insert for vertical shaft impactor rotor |
EP0455023A1 (en) * | 1990-05-04 | 1991-11-06 | F.B. LEHMANN Maschinenfabrik GmbH | Impact mill, especially for cocoa beans |
US5439044A (en) * | 1992-04-10 | 1995-08-08 | Boenisch; Dietmar | Method of regenerating foundry sand |
DE9309448U1 (en) * | 1993-06-25 | 1994-11-03 | Bauermeister & Co Verfahrenste | Impact mill for oily seeds, in particular cocoa seeds |
US5366170A (en) * | 1993-09-17 | 1994-11-22 | John B. Jones, Jr. | Vertical shaft processor including an improved removal grate |
US20060011762A1 (en) * | 2002-08-28 | 2006-01-19 | Sandvik Intellectual Property Hb | Wear part for a crusher |
US7677484B2 (en) * | 2002-08-28 | 2010-03-16 | Sandvik Intellectual Proerty AB | Wear part for a crusher |
Also Published As
Publication number | Publication date |
---|---|
DE2404000A1 (en) | 1974-08-08 |
IT1008171B (en) | 1976-11-10 |
GB1461164A (en) | 1977-01-13 |
JPS5817661B2 (en) | 1983-04-08 |
JPS49111267A (en) | 1974-10-23 |
DE2404000C2 (en) | 1984-11-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3881664A (en) | Wear plate in an apparatus for conditioning a granular material | |
US2937815A (en) | Disc mills | |
US3900969A (en) | Portable apparatus for blast cleaning | |
US6401798B1 (en) | Rotating drum for reclaiming molding sand and molding sand reclaiming apparatus | |
US2707314A (en) | Method of reclaiming granular material | |
US4126280A (en) | Impact crusher | |
PL192546B1 (en) | Comminution of material into minute particles | |
US3716947A (en) | Abrasive blast cleaning system | |
US3782643A (en) | Apparatus for conditioning a granular material | |
US6431477B1 (en) | Gas flow-type chipping machine | |
AU660542B2 (en) | Pulverizing apparatus | |
US4739937A (en) | Apparatus for conditioning granular material | |
US3848815A (en) | Granulating apparatus | |
US2919864A (en) | Centrifugal pulverizer | |
US3815833A (en) | Method and apparatus for grinding thermoplastic material | |
US3404846A (en) | Autogenous grinding mill | |
US4098466A (en) | Impact mill for reducing solids | |
US3610542A (en) | Pulverizer | |
US3312403A (en) | Machine and process for reclaiming foundry sand | |
US3224686A (en) | Impact pulverization-classification | |
US3995814A (en) | Impact disintegrator | |
US3428259A (en) | Process for pulverizing material | |
US3598326A (en) | Ore grinding mechanism and method | |
US3958764A (en) | Granulating apparatus | |
US688229A (en) | Ball grinding-mill. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: KENNECOTT CORPORATION Free format text: MERGER;ASSIGNORS:BEAR CREEK MINING COMPANY;BEAR TOOTH MINING COMPANY;CARBORUNDUM COMPANY THE;AND OTHERS;REEL/FRAME:003961/0672 Effective date: 19801230 |
|
AS | Assignment |
Owner name: NATIONAL WESTMINSTER BANK USA, 592 FIFTH AVENUE, N Free format text: SECURITY INTEREST;ASSIGNOR:PANGBORN CORPORATION, A CORP. OF DE.;REEL/FRAME:004576/0188 Effective date: 19860724 |
|
AS | Assignment |
Owner name: PANGBORN CORPORATION, PANGBORN BLVD., HAGERSTOWN, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KENNECOTT CORPORATION;REEL/FRAME:004614/0421 Effective date: 19860725 |
|
AS | Assignment |
Owner name: MERRILL LYNCH INTERFUNDING INC., NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:PANGBORN CORPORATION;REEL/FRAME:005237/0297 Effective date: 19891211 |
|
AS | Assignment |
Owner name: HELLER FINANCIAL, INC., AS AGENT, ILLINOIS Free format text: SECURITY INTEREST;ASSIGNOR:PANGBORN CORPORATION;REEL/FRAME:008861/0226 Effective date: 19971209 |