US3343800A - Crushing and drying apparatus - Google Patents

Crushing and drying apparatus Download PDF

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Publication number
US3343800A
US3343800A US445014A US44501465A US3343800A US 3343800 A US3343800 A US 3343800A US 445014 A US445014 A US 445014A US 44501465 A US44501465 A US 44501465A US 3343800 A US3343800 A US 3343800A
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US
United States
Prior art keywords
casing
crushing
gas
opening
pass
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Expired - Lifetime
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US445014A
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English (en)
Inventor
Rasmussen Frits
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FLSmidth and Co AS
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FLSmidth and Co AS
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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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/20—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
    • B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
    • B02C13/09—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate
    • B02C13/095—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate with an adjustable anvil or impact plate

Definitions

  • This invention relates to apparatus for crushing mineral material containing moisture as delivered, for example, from a quarry, and is concerned more particularly with a novel apparatus for both crushing and drying moist material.
  • the crushing operation is performed by impact action and the material is dried by hot gas passed through the zone where the crushing is being carried on.
  • the construction of the apparatus is such that the efiiciency of the crushing means does not decrease as the rate of supply of the material to the apparatus increases and the apparatus is, accordingly, effective for the production of dried crushed material at a high output rate.
  • Impact crushers in which the material is crushed by being struck by one or more rotary impactors and thrown against impact surfaces, are well known and hot gas has been introduced through the bottom of the casing of such a crusher to flow upwardly through the impact zone to dry the material.
  • the hot gas passes out through the top opening of the casing, through which the material is introduced, and carries with it entrained crushed material.
  • the present invention is, accordingly, directed to an apparatus for crushing and drying moist material, which overcomes the objections to the prior crushers above described and can be operated at a higher output rate without loss of elficiency.
  • the impact members are so disposed within the crusher casing as to cooperate with the casing walls to form one or more by-passes, through which hot gas may travel from the bottom opening of the casing to the opening at the top.
  • Part of the gas entering the casing flows up through the crushing zone to take part in the drying of the material therein, while the remainder of the gas flowing through the by-passes continually gives up heat to the impact members, so that they dry material in contact therewith and the formation of coatings on the members is avoided.
  • the gas which has passed through the crushing zone and has carried upwardly sufliciently fine crushed material is combined with the by-pass gas and the latter is effective to dry the entrained crushed material leaving the casing.
  • FIG. 1 is a vertical sectional view on the line 11 of FIG. 2 of one form of the new crushing apparatus
  • FIG. 2 is a vertical sectional view on the line 22 of FIG. 1;
  • FIG. 3 is a view similar to FIG. 1 showing a different form of the apparatus.
  • the crushing apparatus shown in FIGS. 1 and 2 includes a metallic casing 10 which is reinforced by plates 11.
  • the casing has a top opening 12, from which leads a duct 13, and an opening 14 at its bottom to which leads a duct 15.
  • a pair of impactors 16a, 16b are mounted in the lower part of the casing and each impactor comprises a shaft 17 having radial flanges 18 on which hammers 19 are pivotally mounted on rods 20.
  • the impactors are rotated in the direction of the arrows (FIG. 1) and material struck by the hammers is thrown against impact members within the casing.
  • the members, against which material is thrown by the hammers of the impactor 16a include plates 21, 22 carried by a frame 23 pivotally mounted at 24 on opposite casing Walls.
  • the frame 23 is held in proper position by a rod 25 which extends through an opening in the casing wall and is encircled by a spring 26 hearing at one end against a nut 27 on the end of the rod and at the other against the casing wall.
  • a third impact plate 28 carried by a frame 29 pivotally mounted on the casing wall.
  • a bar 30 is attached to the frame 29 and extends through an opening in the casing wall, outside which it is attached to the outer end of a safety pin 31, the inner end of which is attached to the casing wall.
  • the pin is so made that it will break and release the frame, when the pin is subjected to an excessive stress as a result of a heavy impact against the plate 28.
  • the plates 21, 22, and 28 cooperate with the wall of the casing to define a by-pass 32 between the casing wall and the impactor 16a and the plates are so disposed in relation to the casing wall that the by-pass decreases in cross-sectional area in an upward direction.
  • the crosssectional area of the by-pass may be further controlled by means of a throttle plate 33 mounted on the frame 23 between plate 21 and the casing wall.
  • the impactor 16b and the impact members associated therewith are of the same construction as the impactor 16:1 and its impactor members and the corresponding parts are designated by the same reference characters with the prime mark added.
  • the impact plates 21', 22', and 2S cooperate with the casing wall to form a by-pass 32' between the wall and the impactor 16b and the bypass decreases in cross-sectional area in an upward direction. Flow through the by-pass 32' may be controlled by a throttle plate 33 mounted on the frame 23.
  • Grids 34 are disposed below the respective impactors 16a, 16b and the grids lie close to the path of travel of the outer ends of the hammers 19, 19 of the impactors, so that material lodging upon a grid will be thrown by the hammers of the associated impactor toward the other.
  • the moist material to be crushed is introduced through the duct 14 and falls upon the impactors by which it is thrown against the impact members.
  • the members lie outside the downward projection of the opening 13 at the top of the casing so that material to be crushed may drop between the plates 22, 22' without being intercepted thereby and the horizontal offsetting of plates 21 and 22 and of plates 21 and 22 allows material, which may have accidentally entered the by-passes, to fall to the impactors 16a, 16b.
  • hot gas is introduced into the casing through the duct and flows upward through the casing and out through the opening 12 and duct 13.
  • Part of the hot gas passes up between the impact plates 28, 28' and thus through the crushing zone, while the remainder flows through the bypasses 32, 32' defined by the casing walls and the adjacent impact plates.
  • the gas which flows through the crushing zone, entrains crushed material and is joined at the top of the casing by the gas which has traveled through the by-passes.
  • the by-pass gas heats the impact plates so that moist material tending to adhere thereto will be dried and will either not adhere or will be knocked free by material thrown against the plates by the impactors. Material not struck by the hammers but passing through the grids falls into the path of the gases flowing into the casing and is ordinarily entrained and carried through the casing either between the impactors or through the by-passes.
  • the gas with entrained material which travels through the duct 13 is passed to a separator in which the crushed dried material is separated from the gas. Material which passes between the impactors or through the grids and is not entrained by the hot gas, is collected and combined with the separated dried material discharged through the duct 14 or added to the material to be crushed.
  • the crushing apparatus shown in FIG. 3 includes a casing 35 having a top opening 36, from which leads a duct 37, and a bottom opening 38, to which leads a duct 39.
  • a rotary impactor 16 of the same construction as the impactors 16a, 16b is mounted within the casing and it acts to throw material against impact members comprising horizontally spaced impact plates 4%, 41 mounted on a frame 42 pivotally mounted on the casing wall.
  • the frame is held in position by a rod 43 attached to the frame and extending through the casing wall and the exposed part of the rod is encircled by a spring 44 bearing at one end against the casing wall and, at the other, against a nut 45 on the rod.
  • the impact members also comprise a plate 46 mounted on a frame 47 pivotally mounted on the casing and held in place by a bar 48 attached to the frame and extending through an opening in the casing wall.
  • the exposed part of the bar is attached to the outer end of a safety pin 49, the inner end of which is secured to the casing. The pin will break and release the frame if the latter is subjected to an excessive stress.
  • the plates 40, 41, and 46 cooperate with the wall of the casing to form a by-pass 50 which decreases in crosssectional area in an upward direction. Gas flow through the by-pass may be controlled by a throttle plate 51 mounted on the frame 42.
  • Fixed impact members 52 are mounted on the opposite side of the impactor 16' from the frames 42, 47 and the plates 40, 41 and 46 carried thereby.
  • the members 52 cooperate with the casing walls to form a bypass 53 which decreases in cross-sectional area in an upward direction.
  • the impact members above the impactor lie outside the downward projection of the opening 36 and thus do not interfere with the free fall of material introduced into the casing through the opening 36.
  • the moist material to be crushed is introduced into the casing through the opening 36 and falls between the fixed impact members 52 and the plates 40 and 41 to the impactor 16.
  • Hot gas enters the casing from the duct 39 through the opening 38 and part of the gas travels through the by-passes 5t 53, while the remainder passes upward through the crushing zone.
  • Material reduced to the proper size is entrained in the gas passing between the plates 40, 41, and 46 and the plates 52 and carried out of the casing through the opening 36.
  • the hot gas traveling through the by-passes heats the impact members so that the moist material will not adhere to the surfaces of the members and thus reduce the efiiciency of the crushing operation.
  • An apparatus for simultaneously crushing and drying moist material comprising a casing having openings at its top and bottom, means for introducing hot gas into the casing through the bottom opening, means for introducing material to be crushed into the casing and for conducting gas and entrained crushed material from the casing through the top opening, and crushing means inside the casing in the path of gas flowing upwardly through the casing, the crushing means including impactors for crushing material against impact members and the impact members adjacent to but spaced from the casing side walls and co-operating therewith to define at least one by-pass open at its bottom to receive part of the hot gas introduced through the bottom opening of the apparatus with the gas flowing upwardly through the by-pass in heat exchange relationship with the impact members to dry material in contact therewith and the top of the by-pass opening adjacent the top opening of the apparatus so that gas from the bypass combines with the gas and entrained material to dry the entrained material.
  • the regulating means comprise a throttle plate mounted on an impact member and reducing the cross-sectional area of the bypass.
  • the crushing means include at least one impactor mounted for rotation inside the casing adjacent to the bottom opening and impact members on opposite sides of the impactor cooperating with opposite side walls of the casing to define by-passes for gas around the crushing means.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Disintegrating Or Milling (AREA)
  • Tents Or Canopies (AREA)
  • Carbon And Carbon Compounds (AREA)
US445014A 1964-04-29 1965-04-02 Crushing and drying apparatus Expired - Lifetime US3343800A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17813/64A GB992483A (en) 1964-04-29 1964-04-29 Improvements in impact crushers

Publications (1)

Publication Number Publication Date
US3343800A true US3343800A (en) 1967-09-26

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US445014A Expired - Lifetime US3343800A (en) 1964-04-29 1965-04-02 Crushing and drying apparatus

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US (1) US3343800A (enrdf_load_html_response)
AT (1) AT268023B (enrdf_load_html_response)
DE (1) DE1276424C2 (enrdf_load_html_response)
ES (1) ES312297A1 (enrdf_load_html_response)
FI (1) FI41334B (enrdf_load_html_response)
GB (1) GB992483A (enrdf_load_html_response)
NO (1) NO118641B (enrdf_load_html_response)
SE (1) SE313484B (enrdf_load_html_response)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417933A (en) * 1965-07-12 1968-12-24 Black Clawson Co Pulper
US4049206A (en) * 1975-04-12 1977-09-20 Hazemag Dr. E. Andreas Kg Comminuting machine for trash
US4140284A (en) * 1975-09-15 1979-02-20 Hazemag Dr. E. Andreas Gmbh & Co. Impact crusher
USRE30778E (en) * 1976-12-01 1981-10-20 Pennsylvania Crusher Corporation Crusher-dryer and method of crushing
US5505393A (en) * 1993-05-25 1996-04-09 Thyssen Industrie Ag Crushing device especially for scrap metal
US5881959A (en) * 1995-05-04 1999-03-16 Cmi Corporation Materials grinder with infeed conveyor and anvil
US5890666A (en) * 1997-01-31 1999-04-06 Krupp Fordertechnik Gmbh Impact crusher
US6736342B2 (en) 2000-02-15 2004-05-18 Mayfran International B.V. Method and apparatus for comminuting chips
US6745966B2 (en) * 2001-03-17 2004-06-08 Hazemag & Epr Gmbh Impact mill with pivotable impact apron
US20100095561A1 (en) * 2006-10-20 2010-04-22 Mirco Risi Bucket that is applicable interchangeably to operating machines provided with hydraulic or electric plant
CN102294283A (zh) * 2011-06-29 2011-12-28 江油黄龙破碎输送设备制造有限公司 一种三转子反击式破碎机
US20140117128A1 (en) * 2011-06-15 2014-05-01 Outotec Oyj Equipment to prepare ore concentrate for pelletizing
WO2014188069A1 (en) * 2013-05-22 2014-11-27 Bmh Technology Oy Crusher
CN104941725A (zh) * 2015-05-28 2015-09-30 山东联邦重工有限公司 一种带调整装置的双转子锤式制砂机
CN106179598A (zh) * 2016-08-29 2016-12-07 中材装备集团有限公司 一种用于矿石破碎的双转子反击式破碎机

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB992483A (en) * 1964-04-29 1965-05-19 Smidth & Co As F L Improvements in impact crushers
FR2583656A1 (fr) * 1985-06-25 1986-12-26 Collin Jean Claude Machine de dechiquetage de matieres ligneuses en vrac de grand volume
RU2264863C1 (ru) * 2004-04-06 2005-11-27 Общество с ограниченной ответственностью "Торговый дом "Обуховская промышленная компания" Дробилка
RU2264864C1 (ru) * 2004-04-06 2005-11-27 Общество с ограниченной ответственностью "Торговый дом "Обуховская промышленная компания" Способ последовательного дробления
RU2299765C2 (ru) * 2004-10-25 2007-05-27 Институт горного дела Севера СО РАН Способ ударного дробления и дробилка для его осуществления

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE24919C (de) * F. PELZER in Dortmund Ventilationsvorhänge oder Klappen
US568289A (en) * 1896-09-22 Grinding mill
US851607A (en) * 1904-03-09 1907-04-23 Francis I Du Pont Machine for mixing and treating plastic substances.
US1189062A (en) * 1913-12-31 1916-06-27 Thomas Coleman Apparatus for drying or heating material.
US1697704A (en) * 1926-04-01 1929-01-01 Int Comb Eng Corp Apparatus for pulverizing
US1761138A (en) * 1926-02-23 1930-06-03 Henry G Lykken Device for reducing materials
GB348977A (en) * 1930-08-29 1931-05-21 Bernhard Kraemer Improvements in devices for feeding furnaces with fuel
US2486421A (en) * 1943-03-01 1949-11-01 Harriet F Derrick Double impeller impact breaker
DE1027964B (de) * 1955-05-13 1958-04-10 Borsig Ag Schlaegermuehle zur Feinzerkleinerung von Kohle und aehnlichen Stoffen
CA658032A (en) * 1963-02-19 Jackering Gunther Grinding apparatus with automatic feed regulation and classification
CH385600A (de) * 1959-11-21 1964-12-15 Weserhuette Ag Eisenwerk Verstellvorrichtung für Doppelbacken-Walzenbrecher
GB992483A (en) * 1964-04-29 1965-05-19 Smidth & Co As F L Improvements in impact crushers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE965743C (de) * 1953-05-16 1957-06-19 Buettner Werke Ag Prallmuehle, insbesondere fuer feuchtes Mahlgut
DE1034955B (de) 1954-06-12 1958-07-24 Arno Andreas Prallschleudermuehle mit um eine waagerechte Achse umlaufendem Rotor
DE1193777B (de) 1961-12-09 1965-05-26 Hazemag Hartzerkleinerung Mahltrocknungsvorrichtung

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE24919C (de) * F. PELZER in Dortmund Ventilationsvorhänge oder Klappen
US568289A (en) * 1896-09-22 Grinding mill
CA658032A (en) * 1963-02-19 Jackering Gunther Grinding apparatus with automatic feed regulation and classification
US851607A (en) * 1904-03-09 1907-04-23 Francis I Du Pont Machine for mixing and treating plastic substances.
US1189062A (en) * 1913-12-31 1916-06-27 Thomas Coleman Apparatus for drying or heating material.
US1761138A (en) * 1926-02-23 1930-06-03 Henry G Lykken Device for reducing materials
US1697704A (en) * 1926-04-01 1929-01-01 Int Comb Eng Corp Apparatus for pulverizing
GB348977A (en) * 1930-08-29 1931-05-21 Bernhard Kraemer Improvements in devices for feeding furnaces with fuel
US2486421A (en) * 1943-03-01 1949-11-01 Harriet F Derrick Double impeller impact breaker
DE1027964B (de) * 1955-05-13 1958-04-10 Borsig Ag Schlaegermuehle zur Feinzerkleinerung von Kohle und aehnlichen Stoffen
CH385600A (de) * 1959-11-21 1964-12-15 Weserhuette Ag Eisenwerk Verstellvorrichtung für Doppelbacken-Walzenbrecher
GB992483A (en) * 1964-04-29 1965-05-19 Smidth & Co As F L Improvements in impact crushers

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417933A (en) * 1965-07-12 1968-12-24 Black Clawson Co Pulper
US4049206A (en) * 1975-04-12 1977-09-20 Hazemag Dr. E. Andreas Kg Comminuting machine for trash
US4140284A (en) * 1975-09-15 1979-02-20 Hazemag Dr. E. Andreas Gmbh & Co. Impact crusher
USRE30778E (en) * 1976-12-01 1981-10-20 Pennsylvania Crusher Corporation Crusher-dryer and method of crushing
US5505393A (en) * 1993-05-25 1996-04-09 Thyssen Industrie Ag Crushing device especially for scrap metal
US5881959A (en) * 1995-05-04 1999-03-16 Cmi Corporation Materials grinder with infeed conveyor and anvil
US5890666A (en) * 1997-01-31 1999-04-06 Krupp Fordertechnik Gmbh Impact crusher
US6736342B2 (en) 2000-02-15 2004-05-18 Mayfran International B.V. Method and apparatus for comminuting chips
US6745966B2 (en) * 2001-03-17 2004-06-08 Hazemag & Epr Gmbh Impact mill with pivotable impact apron
US20100095561A1 (en) * 2006-10-20 2010-04-22 Mirco Risi Bucket that is applicable interchangeably to operating machines provided with hydraulic or electric plant
US8117771B2 (en) * 2006-10-20 2012-02-21 Simex Srl Bucket that is applicable interchangeably to operating machines provided with hydraulic or electric plant
US20140117128A1 (en) * 2011-06-15 2014-05-01 Outotec Oyj Equipment to prepare ore concentrate for pelletizing
CN102294283A (zh) * 2011-06-29 2011-12-28 江油黄龙破碎输送设备制造有限公司 一种三转子反击式破碎机
CN102294283B (zh) * 2011-06-29 2013-04-24 四川皇龙智能破碎技术股份有限公司 一种三转子反击式破碎机
WO2014188069A1 (en) * 2013-05-22 2014-11-27 Bmh Technology Oy Crusher
CN105209174A (zh) * 2013-05-22 2015-12-30 Bmh科技有限公司 破碎机
KR20160009576A (ko) * 2013-05-22 2016-01-26 비엠에이취 테크놀로지 오와이 분쇄기
EP2999541A4 (en) * 2013-05-22 2017-05-10 BMH Technology Oy Crusher
US10016761B2 (en) 2013-05-22 2018-07-10 Bmh Technology Oy Crusher
CN105209174B (zh) * 2013-05-22 2018-07-13 Bmh科技有限公司 破碎机
CN104941725A (zh) * 2015-05-28 2015-09-30 山东联邦重工有限公司 一种带调整装置的双转子锤式制砂机
CN106179598A (zh) * 2016-08-29 2016-12-07 中材装备集团有限公司 一种用于矿石破碎的双转子反击式破碎机

Also Published As

Publication number Publication date
GB992483A (en) 1965-05-19
DE1276424C2 (de) 1974-05-02
NO118641B (enrdf_load_html_response) 1970-01-19
ES312297A1 (es) 1965-10-01
FI41334B (enrdf_load_html_response) 1969-06-30
SE313484B (enrdf_load_html_response) 1969-08-11
DE1276424B (enrdf_load_html_response) 1974-05-02
AT268023B (de) 1969-01-27

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