US3843064A - Crusher blades of a sinter discharge part of a sintering machine - Google Patents

Crusher blades of a sinter discharge part of a sintering machine Download PDF

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Publication number
US3843064A
US3843064A US00270508A US27050872A US3843064A US 3843064 A US3843064 A US 3843064A US 00270508 A US00270508 A US 00270508A US 27050872 A US27050872 A US 27050872A US 3843064 A US3843064 A US 3843064A
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United States
Prior art keywords
case
blades
flow passage
blade
cooling medium
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Expired - Lifetime
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US00270508A
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English (en)
Inventor
M Suzuki
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Nippon Steel Corp
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Nippon Steel Corp
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Publication date
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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
    • 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
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/06—Endless-strand sintering machines

Definitions

  • FIG 2 PATENTEU 0m 22 um IO 5 U JUU PME NTEUUCI 22 m4 Sammie CRUSIIER BLADES OF A SINTER DISCHARGE PART OF A SINTERING MACHINE
  • the present invention relates to crusher blades of a sinter discharge part for the sintering machine.
  • sinters are crushed by crusher blades provided at the sinter discharge part of a sintering machine for crushing the sinters into grain sizes suitable for feeding into a blast furnace after sintering.
  • the crusher blades in such an arrangement cooperate with a crushing plate A, usually positioned as shown in FIG. l, and, the blades C fixed on a crusher B of a rotating body, pass through gaps in plate A for crushing sinters supplied to that location.
  • each portion thereof is made of parts with high heat resistance and with high wear resistance, for example, a cast liner of high chromium content or of highcarbon content is used in the blades, or blades with hardened padding of tungsten or carbide type are used, and yet their serviceable life is quite limited.
  • the present invention was made to solve, in an advantageous manner, the disadvantages experienced in the past.
  • the invention relates to a crusher blade of the sinter discharge part of a sintering machine, wherein a case encloses a rotating shaft and the-blades are secured to and extend outwardly from the case and each blade contains a dividing member.
  • a cooling medium supply pipe and a cooling medium exhaust pipe are attached to the case so that the cooling medium can be passed through the blades flowing around the dividing member.
  • the present invention has such an arrangement of dividing plates within the case so that the cooling medium circulates through the case and the blades and then is exhausted, or such arrangement is provided by casting or by machine fabrication for forming the cooling medium flow-paths without the use of dividing plates within the case with the cooling medium supplied to one end of the row of blades and exhausted from the other end to achieve the cooling.
  • the present invention may be simply composed by attaching a cooling medium supply pipe and exhaust pipe to a case provided about a rotating shaft,
  • the supply pipe, etc,. may be connected to the blades with a joint, etc,. when the blades rotate.
  • liquid such as water
  • gaseous substance such as air
  • FIG. 1 is a schematic drawing; of a crushing plate;
  • FIG. 2 is a front elevational view with a portion thereof in section showing an example of the present invention;
  • FIG. 3 is an enlarged view of the part of FIG. 2 shown bythe arrow A-A;
  • FIG. 4 is a front elevational 'view with a portion thereof in section showing another example of the present invention;
  • FIG. 5 is a front elevational view with a portion in section showing another example of the present invention;
  • FIG. 6 is a schematic view illustrating the circulation of cooling medium; and
  • FIG. 7 is a schematic view in cross section showing a portion of the FIG. 6 as marked by arrow B-B.
  • 1 is a rotating shaft. 2,2 are blades, 7 3,3" are dividing plates, is a case, 5 is a cooling mediumsupply pipe, 6 is a cooling medium discharge pipe, 8 is an exhaust tank, 9 is aplate, I0 is a joint, 11 represents blade edges, 12 represents holes or passages, 13 represents grooves, and 14 is an exhaust hole,
  • dividing plates 3 are provided within hollow blades 2, 2 which are spaced at equal intervals on a rotating shaft 1, and the rotating shaft 1 is covered with a case 4 in such manner that the blades 2, 2' are connected to and extend outwardly from the case 4.
  • the dividing plates 3 are connected to the shaft 1 and extend outwardly through the case 4 in the ho]- low blades 2,2 and terminate short of the inner surface of the blades at their radially outer ends.
  • Dividing plates 3' are provided within the case 4 extending in the axial direction of the shaft between the shaft and the inner surface of the case as shown in the drawing, and a cooling mediumsupply pipe 5 and a cooling medium discharge pipe 6 are attached to the case 4 at one of its ends.
  • a cooling medium is supplied into the case 4 through the supply pipe 5.
  • the cooling medium flows through the blades 2 passing around the dividing plates 3 within the blades 2 thus sufficiently cooling the blades 2.
  • the cooling medium passes in a tortuous path through the blades 2 from the cooling medium supply end of the rotating shaft 1 to the opposite end, then as shown by the arrows in FIG. 2 the cooling medium reverses direction and flows back toward the supply end.
  • the cooling medium passes around the dividing plates within the blade 2'. After flowing through the blades 2, the cooling medium is discharged from the exhaust pipe 6' and through an exhaust tank 8.
  • dividing plates 3 are provided within the hollow blades 2, 2 which are mounted on a rotating shaft 1 at equal intervals.
  • the rotating shaft 1 is enclosed within a case 4 and the blades 2, 2' are attached to and extend outwardly from the case 4 so that the interiors of the hollow blades communicate with the interior of the case.
  • a cooling medium supply pipe 5 is attached to the case 4 at one end tached to the case 4 at the other end of the-rotating shaft 1. Accordingly the cooling medium moves around along the dividing plates 3 as it flows through the blades 2, 2 and the case 4 and cool the blades.
  • the cooling medium flows from the supply pipe 5 at one end to the exhaust pipe at the other end.
  • the blades 2,2 are rotated as they are cooled and lumps of sinters are crushed by the blades 2, 2 and the plate 9.
  • In the drawing is a joint.
  • FIG. 5 In FIG. 5, FIG. 6 and FIG. 7, holes or passages 12 are machined within the blades 2,2 which are located at equal intervals on a rotating shaft 1 with the adjacent blades in the axial direction spaced 90 apart. Further, grooves 13 are machined in a' case 4 in such a manner that thegrooves are connected to the holes 12 in the blades 2, 2', and the blades 2, 2 and the case 4 are joined together by welding. As shown in the drawing a cooling medium exhaust hole 14 is provided in one end of the rotating shaft 1 and a cooling medium supply pipe 5 is provided within the hole 14 in a concentric arrangement for circulating cooling medium.
  • the cooling medium circulate through a course consisting of the supply pipe 5 the hole 12 of the blade the groove 13 of the case the hole 12 of the next blade the groove l3 ofthe next case the hole 12 of the next blade the groove 13 of the next blade the hole 12 of the'blade and then to the exhaust hole 14 for discharge to the outside.
  • the dotted lines 15 in FIG. 7 shows next blades.
  • the blades 2, 2 are thus rotated while being cooled and lumps of sinters are crushed by the blades 2, 2' and the plate 9.
  • In the drawing 16 is a liner with hardening padding.
  • Performance 1 Crusher blades of the sinter discharge part of a continuous sintering machine having a production capacity of 8,400 t/D (tons/day) (DL sintering machine) were arranged as shown in the Example I, and 250 l/min. (liters/minutes) of water was passed as'a cooling medium to cool the blade liners which had been used at a temperature of about 500C. The liner was cooled and maintained at 200C and the sinters were crushed. Thus when about 1 million tons of sinters were processed, the blades were in such state as being sufficiently serviceable for continued use, and the durability of the blades which had been conventionally limited to a period for processing 350 to 400 thousand tons was remarkably enhanced.
  • Performance 2 Crusher blades of a sinter discharge part of a continuous sintering machine having a production capacity of 4,500 t/D (DL sintering machine) were arranged as in the Example 2, and 250 l/min. of water was made to pass as cooling medium, and the blade liners which had been conventionally maintained at a temperature of about 500C was cooled and maintained at 200C to crush sinters.
  • the blades were in sufficiently serviceable condition for continued use.
  • the durability of the blades which had been conventionally limited to a processing period of 350 to 400 thousand tons was remarkably enhanced.
  • the present invention has such a distinguished effect that the serviceable life of the blades can be made remarkably longer and the operation of the equipment can be remarkably enhanced, thus productivity can be greatly improved.
  • Llairaamw 1 In the sinter discharge part of a sintering machine comprising an axially elongated rotating shaft and crusher blades mounted on said shaft for rotation therewith for crushing sinters to a suitable grain size for feeding into a blast furnace, wherein the improvement comprises a case laterally enclosing said rotating shaft and secured thereon for rotation therewith, individual said blades attached to and extending outwardly from said case and spaced apart in the axial direction of said shaft, a cooling medium supply pipe connected to said case, a cooling medium exhaust pipe connected to said case, said case having at least one flow passage therethrough for the cooling medium, each said blade having a flow passage therethrough communicating with said at least one flow passage in said case for circulating the cooling medium in turn through said blades and case for maintaining said blades within a desired temperature
  • said case comprises a hollow body with its inner surface spaced radially outwardly from said shaft and forming an axially extending flow passage therebetween, dividing plates positioned within said case and extending in the axial direction of said shaft through said flow passage in said case from one end of said case to a transverse plane short of the other end thereof so that the flow passage is divided by said dividing plates into two sections in communication at the other end of said flow passage in said case, said blades being hollow, a dividing plate for each said blade secured at its radially inner end to said shaft and extending outwardly therefrom transversely of said shaft through the flow passage in said case into said blade in spaced relation from the inner surface of the hollow space within said blade and terminating at its radially outer end inwardly from the radially outer end of the hollow space within saidblade so that the flow passage within each said blade extends from the JPQfi blade t sasa to the
  • said case is formed from a solid body having individual small flow passages machined therein in the axial direction of said shaft and extending between said blades spaced apart in the axial direction of said shaft, the cross-sectional area of said case extending transversely of the axis of said shaft being significantly greater than the cross-sectional area of said flow passages in said case, each said blade being formed from a solid body and having a continuous flow passage machined therein extending outwardly from each said blade from one said flow passage in said case to another said flow passage therein, and the crosssectional area of said blades being significantly greater than the cross-sectional area of said flow passages in said blades.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crushing And Pulverization Processes (AREA)
US00270508A 1971-07-12 1972-07-10 Crusher blades of a sinter discharge part of a sintering machine Expired - Lifetime US3843064A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46051067A JPS5113087B1 (de) 1971-07-12 1971-07-12

Publications (1)

Publication Number Publication Date
US3843064A true US3843064A (en) 1974-10-22

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ID=12876441

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US00270508A Expired - Lifetime US3843064A (en) 1971-07-12 1972-07-10 Crusher blades of a sinter discharge part of a sintering machine

Country Status (6)

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US (1) US3843064A (de)
JP (1) JPS5113087B1 (de)
BR (1) BR7204583D0 (de)
GB (1) GB1385253A (de)
IT (1) IT962735B (de)
NL (1) NL171925B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049205A (en) * 1975-07-29 1977-09-20 The Mastermix Engineering Company Limited Horizontal, detachable, ball mill
US4273298A (en) * 1979-07-30 1981-06-16 Boriskin Ivan K Apparatus for crushing agglomerated mass
US4492342A (en) * 1980-12-12 1985-01-08 Clement Burton Centrifugal drum for metallurgical slag
US5333802A (en) * 1992-01-24 1994-08-02 Conec, Inc. Method and apparatus for producing chunks or kibbles of a foodstuff
US5562255A (en) * 1995-04-04 1996-10-08 Witko; Zbigniew J. Combined primary and secondary tire shears
US8720805B1 (en) * 2009-07-29 2014-05-13 Larry E. Koenig System and method for cooling a densifier
CN107309046A (zh) * 2017-07-26 2017-11-03 太仓市山姆绿丰农产品专业合作社 一种设有棱柱刀头的粉碎机

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049205A (en) * 1975-07-29 1977-09-20 The Mastermix Engineering Company Limited Horizontal, detachable, ball mill
US4273298A (en) * 1979-07-30 1981-06-16 Boriskin Ivan K Apparatus for crushing agglomerated mass
US4492342A (en) * 1980-12-12 1985-01-08 Clement Burton Centrifugal drum for metallurgical slag
US5333802A (en) * 1992-01-24 1994-08-02 Conec, Inc. Method and apparatus for producing chunks or kibbles of a foodstuff
US5562255A (en) * 1995-04-04 1996-10-08 Witko; Zbigniew J. Combined primary and secondary tire shears
US8720805B1 (en) * 2009-07-29 2014-05-13 Larry E. Koenig System and method for cooling a densifier
CN107309046A (zh) * 2017-07-26 2017-11-03 太仓市山姆绿丰农产品专业合作社 一种设有棱柱刀头的粉碎机

Also Published As

Publication number Publication date
DE2234019A1 (de) 1973-01-25
DE2234019B2 (de) 1975-08-28
IT962735B (it) 1973-12-31
JPS5113087B1 (de) 1976-04-24
NL171925B (nl) 1983-01-03
NL7209581A (de) 1973-01-16
BR7204583D0 (pt) 1973-05-15
GB1385253A (en) 1975-02-26

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