US3459380A - Apparatus and method for making a slurry - Google Patents

Apparatus and method for making a slurry Download PDF

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Publication number
US3459380A
US3459380A US547331A US3459380DA US3459380A US 3459380 A US3459380 A US 3459380A US 547331 A US547331 A US 547331A US 3459380D A US3459380D A US 3459380DA US 3459380 A US3459380 A US 3459380A
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Prior art keywords
slurry
mill
outlet
grinding
compartment
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Expired - Lifetime
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US547331A
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English (en)
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Helge Carl Christian Kartman
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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
    • 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
    • B02C17/04—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 with unperforated container
    • B02C17/06—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 with unperforated container with several compartments

Definitions

  • FIG. 2 H. c. c. KARTMAN APPARATUS AND METHOD FOR MAKING A SLURRY Filed May 5, 1966 FIG. 2
  • This invention relates to an apparatus and method for making a slurry. More particularly it relates to a mill divided into compartments by at least one sieve member to form at least two compartments, one compartment for initially preparing a slurry of required fineness for separation out of the hollow sieve ring and a second compartment for washing and autogeneous grinding of the unseparated slurry; it further relates to a method of preparing a slurry by first preparing a slurry from solid materials and water, separating slurry of the desired fineness therefrom, and simultaneously washing and autogeneously grinding the remaining slurry.
  • the invention has particular applicability to the preparation of mineral slurries in the manufacture of cement, lime and the like, but can be used in any manufacturing processes in which a mixture of materials is converted to a homogeneous aqueous slurry.
  • the slurry can be formed on a continuous basis without need for frequent shut-down as formerly was necessary.
  • the apparatus of the invention is in a combined wash and grinding mill for making a slurry from solid material and water and separating the fine slurry from the mill as it is formed.
  • the mill is comprised of a rotatable tubular mill housing with an inlet in the housing for feeding solid material and water therein.
  • At least one internal sieving dam member is secured to the inside wall of the housing and forms at least two axially separated compartments on opposite sides of the dam member.
  • the dam member has axially spaced sieve portions facing each compartment for receiving fine slurry from both adjoining compartments; and the spaced sieve portions define a hollow collection chamber therebetween in which the separated slurry is collected as it passes through the sieve portions.
  • Slurry outlet means are connected to the hollow collection chamber for feeding the collected slurry therefrom.
  • a conduit extends through the dam member for transferring coarse materials into the next compartment.
  • Means are provided for feeding water into the compartment adjacent the outlet end of the housing for simultaneously washing and autogeneously grinding of the slurry and means are provided for transferring nibs of coarse material from the mill at its outlet end.
  • the housing is preferably cylindrically mounted at both ends with hollow trunnions which serve as the inlet and outlet for the mill and the dam members are ring shaped with a conduit extending through the hub of the ring and have annular sieve portions surrounding the conduit.
  • a peripheral outlet is formed through the casing and into the collection chamber. It is further preferred to form the darn ring from two dished members which have hollow joined hubs that form the conduit.
  • the method of the invention lies in making an aqueous slurry and comprises feeding solid material and water to at least one mixing zone to form a slurry and sieving fine slurry from this zone while conveying coarser material to a grinding zone; water is added to the coarser material in the grinding zone and fine slurry is separately sieved while nibs of coarse material remaining after grinding are removed from the grinding zone.
  • the coarse material does not interfere with the outflow of slurry from the first compartments of the mill and any accumulation of coarse particles in the last compartment is no drawback since the presence of the coarse materials in the last compartment subjects particles to more effective autogeneous grinding.
  • the main part of the coarse resistant material conveyed to the last compartment of the mill is crushed during the autogeneous grinding but a small portion, commonly called nibs, may remain uncrushed. These nibs are discharged through the mill outlet thereby keeping a high slurry level in the mill while avoiding slurry spill. Water is added to the grinding compartment to facilitate passage of slurry from the compartment.
  • FIG. 1 is a sectional view along the axis of the mill.
  • FIG. 2 is a section taken along the lines 22 of FIG. 1.
  • a grinding mill 10 is shown and is constructed of a general cylindrical housing 11 which has hollow inlet and outlet trunnions 12 and 13 extending axially from an inlet end 14 and outlet end 15 of the mill.
  • the inlet and outlet trunnions are carried in bearings 16 and 17 so that the entire housing is freely rotatable by any suitable drive means common to the art and not shown.
  • an elbow connection 18 Connected to the inlet hollow trunnion 12 is an elbow connection 18 which has a funnel shaped inlet end into which solid or semi-solid material such as cement raw material and lime can be introduced with water through a water pipe 19 for feed into the housing 11.
  • the housing 11 has an inner lining 20 and it is divided into three compartments 21, 22 and 23 by two axially spaced sieving dam rings 24 and 25 which are of identical construction, and thus a description of only one is necessary.
  • the sieving dam ring is constructed of two dished annular sieve plates 26 and 27 which converge inwardly toward each other and are joined at their hollow hub portion to form a center conduit 28 which extends axially through the center of the dam ring.
  • the outer rims 29 and 30 of the respective sieve plates are fixed to the inner lining of the housing and therefore rotate with the housing.
  • the dished annular sieved plates have a series of concentrically spaced arcuate slots 31 which are concentrically spaced around the plate and increase in width from the center to the outer rim 29. Each radial progression of slots is separated by a radially extending solid bar 32.
  • the space between the sieve plates defines a collection chamber 33 into which fine slurry, the size of which is dependent on the slot openings, is fed into the collecting chamber from either side of the dam ring.
  • Underlying the collecting chamber at the bottom of the housing 11 is a slurry outlet opening 34.
  • the entire periphery surrounding the dam ring is enclosed in a stationary casing 35 which provides a reservoir for the slurry being fed from the peripheral outlet 34 of the collecting chamber.
  • lifter plates 36 and 37 which are circumferentially spaced around the lining of the casing.
  • the lifting plates are inclined toward the outlet end of the housing.
  • Secondary lifter plates 38 and 39 are mounted on the face of the annular sieve plates and are circumferentially spaced thereabout. These lifters advance the slurry toward the outlet end of the mill and improve the sieve of fine slurry from the chambers and passage of the coarser material to the respective compartments through the center conduit 28.
  • Lifter plates 40 similar to the lifter plates 36 and 37 are provided adjacent the outlet trunnion mill and secondary lifters 41 are provided on the end wall of the mill adjacent to the outlet trunnion 13 and they function in a similar way to transfer the particles in the last chamber to the outlet trunnion.
  • a water pipe 42 extends into the last compartment 23 through the outlet trunnion and has a spreader head 43 for spraying water into the last compartment to form slurry in this compartment and facilitate transfer of the slurry through the sieve dam ring 25.
  • the solid material and water are mixed in the first chamber 21 to form a slurry, some of which is of the fineness desired and other is too coarse.
  • the lifters 36 and secondary lifters 38 transfer the material in the first compartment against the sieve plate and slurry of the required fineness passes into the sieve plate and into the chamber where it is peripherally discharged through outlet 34 and into casing 35.
  • Coarser material passes through the conduit 28 and into the second mixing chamber 22. Further mixing occurs in the secondary chamber and the material is again contacted against the secondary sieve darn ring 25 again separating slurry of the desired fineness.
  • the slurry is also in contact with the outlet side of the first sieve dam ring and fine slurry is separated through the first sieve dam ring at the same time.
  • a combined wash and grinding mill for making a slurry from solid material and water and separating fine slurry from the mill as it is formed comprising a rotatable tubular mill housing, an inlet into said housing for feeding solid material and water therein, at least one internal sieving dam member secured to the inside wall of the housing forming at least two axially separated compartments on opposite sides of the member, axially spaced sieve portions of said member facing each compartment for receiving fine slurry from both adjoining compartments and defining a hollow collection chamber therebetween in which the separated slurry 1s collected as it passes through the sieve portions, outlet means connected to said hollow collection chamber for feeding the slurry therefrom, a conduit extending through said darn member for transferring coarse material into the next compartment, means for feeding water into the compartment adjacent the outlet end of the housing for simultaneous washing and autogeneous grinding of the slurry, and means for transferring nibs of coarse material from the mill at its outlet end.
  • a grinding mill according to claim 1 wherein two axially spaced dam members are mounted in the housing thereby forming three compartments.
  • darn ring is formed from spaced dished members which have hollow hubs that are joined to form said conduit.
  • a grinding mill according to claim 3 wherein the mill inlet extends into the first compartment through a first hollow trunnion and said mill outlet extends from the last compartment through a second hollow trunnion.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Noodles (AREA)
US547331A 1965-05-04 1966-05-03 Apparatus and method for making a slurry Expired - Lifetime US3459380A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18748/65A GB1037350A (en) 1965-05-04 1965-05-04 Method of making a slurry and compartment mill for carrying out the method

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US3459380A true US3459380A (en) 1969-08-05

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ES (2) ES326266A1 (enrdf_load_html_response)
GB (1) GB1037350A (enrdf_load_html_response)
SE (1) SE334527B (enrdf_load_html_response)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4078730A (en) * 1975-11-20 1978-03-14 F. L. Smidth & Co. Tube mill
US4613084A (en) * 1983-06-28 1986-09-23 Babcock-Hitachi Kabushiki Kaisha Process for producing a coal-water slurry
US4770352A (en) * 1986-04-17 1988-09-13 Babcock-Hitachi Kabushiki Kaisha Coal-water slurry producing system
US5094715A (en) * 1990-01-10 1992-03-10 Ahlstrom Corporation Arrangement for removing thread-like impurities from a defiberizing drum
US5540395A (en) * 1994-09-30 1996-07-30 Henry Mfg. Co. Concrete cyclone reclaimer
US6043175A (en) * 1992-12-08 2000-03-28 Vkvs Worldwide Corporation Method and apparatus for producing a silicon based binding composition and product prepared therefrom
EP0754529A4 (en) * 1994-04-01 2000-04-05 Maehashi Ind Co Ltd DEVICE FOR ROUNDING OR EDGING STONES
US20140008473A1 (en) * 2011-03-31 2014-01-09 Daito Doboku, Ltd. Mill
US20160030944A1 (en) * 2014-08-04 2016-02-04 General Electric Company Attritor
WO2021168491A1 (de) * 2020-02-25 2021-09-02 Ess Holding Gmbh Nassmühle
US20220088608A1 (en) * 2020-09-22 2022-03-24 Divergent Technologies, Inc. Methods and apparatuses for ball milling to produce powder for additive manufacturing

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE478057C (de) * 1929-06-18 Polysius A G G Mehrkammermuehle zum Mahlen von Thomasschlacke
US1748920A (en) * 1928-02-23 1930-02-25 Allis Chalmers Mfg Co Process of and apparatus for comminuting material
US1902413A (en) * 1931-04-29 1933-03-21 Traylor Engineering & Mfg Comp Method of and apparatus for multiple stage grinding
US2031710A (en) * 1931-08-29 1936-02-25 Firm G Polysius Ag Pulverizing apparatus
US2160169A (en) * 1936-06-18 1939-05-30 Smidth & Co As F L Mill
DE682447C (de) * 1937-10-24 1939-10-14 Fried Krupp Grusonwerk Akt Ges Verfahren und Vorrichtung zur Oberflaechenreinigung, vorzugsweise zum Waschen von stueckigem Gut

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE478057C (de) * 1929-06-18 Polysius A G G Mehrkammermuehle zum Mahlen von Thomasschlacke
US1748920A (en) * 1928-02-23 1930-02-25 Allis Chalmers Mfg Co Process of and apparatus for comminuting material
US1902413A (en) * 1931-04-29 1933-03-21 Traylor Engineering & Mfg Comp Method of and apparatus for multiple stage grinding
US2031710A (en) * 1931-08-29 1936-02-25 Firm G Polysius Ag Pulverizing apparatus
US2160169A (en) * 1936-06-18 1939-05-30 Smidth & Co As F L Mill
DE682447C (de) * 1937-10-24 1939-10-14 Fried Krupp Grusonwerk Akt Ges Verfahren und Vorrichtung zur Oberflaechenreinigung, vorzugsweise zum Waschen von stueckigem Gut

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4078730A (en) * 1975-11-20 1978-03-14 F. L. Smidth & Co. Tube mill
US4613084A (en) * 1983-06-28 1986-09-23 Babcock-Hitachi Kabushiki Kaisha Process for producing a coal-water slurry
US4770352A (en) * 1986-04-17 1988-09-13 Babcock-Hitachi Kabushiki Kaisha Coal-water slurry producing system
US5094715A (en) * 1990-01-10 1992-03-10 Ahlstrom Corporation Arrangement for removing thread-like impurities from a defiberizing drum
US6043175A (en) * 1992-12-08 2000-03-28 Vkvs Worldwide Corporation Method and apparatus for producing a silicon based binding composition and product prepared therefrom
EP0754529A4 (en) * 1994-04-01 2000-04-05 Maehashi Ind Co Ltd DEVICE FOR ROUNDING OR EDGING STONES
US5540395A (en) * 1994-09-30 1996-07-30 Henry Mfg. Co. Concrete cyclone reclaimer
US20140008473A1 (en) * 2011-03-31 2014-01-09 Daito Doboku, Ltd. Mill
US9427742B2 (en) * 2011-03-31 2016-08-30 Daito Doboku, Ltd. Mill
US20160030944A1 (en) * 2014-08-04 2016-02-04 General Electric Company Attritor
WO2021168491A1 (de) * 2020-02-25 2021-09-02 Ess Holding Gmbh Nassmühle
US20220088608A1 (en) * 2020-09-22 2022-03-24 Divergent Technologies, Inc. Methods and apparatuses for ball milling to produce powder for additive manufacturing
US12103008B2 (en) * 2020-09-22 2024-10-01 Divergent Technologies, Inc. Methods and apparatuses for ball milling to produce powder for additive manufacturing

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Publication number Publication date
ES326266A1 (es) 1967-07-01
ES336864A1 (es) 1968-01-01
GB1037350A (en) 1966-07-27
SE334527B (enrdf_load_html_response) 1971-04-26

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