US3866885A - Working method for homogenizing particle material - Google Patents

Working method for homogenizing particle material Download PDF

Info

Publication number
US3866885A
US3866885A US300877A US30087772A US3866885A US 3866885 A US3866885 A US 3866885A US 300877 A US300877 A US 300877A US 30087772 A US30087772 A US 30087772A US 3866885 A US3866885 A US 3866885A
Authority
US
United States
Prior art keywords
particle material
supply apparatus
working method
gutter
plate
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
Application number
US300877A
Other languages
English (en)
Inventor
Arnold W Gerstel
Karel G L Meyers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northrop Grumman Guidance and Electronics Co Inc
Original Assignee
Litton Systems Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Litton Systems Inc filed Critical Litton Systems Inc
Application granted granted Critical
Publication of US3866885A publication Critical patent/US3866885A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G65/00—Loading or unloading
    • B65G65/28—Piling or unpiling loose materials in bulk, e.g. coal, manure, timber, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
    • B65G69/10—Obtaining an average product from stored bulk material

Definitions

  • ABSTRACT A working method for the homogenizing of particle material including depositing said material from a rotating supply apparatus upon a catch plate or gutter of a circularly moving apparatus layer by layer so as to form a ring-shaped pile and thereafter reclaiming said material from said pile at a fixed position and at a rate approximately equal to the rate at which the material is deposited upon said pile is disclosed.
  • the invention relates to a working method to homogenize material consisting of particles in such a way that the material is discharged in layers by a supply apparatus with a circular movement on a catch plate or gutter and it is shaped into a circular pile with a cross-section decreasing from maximum to zero.
  • the discharge is continued and at the same moment approximately the same quantity is reclaimed according to the natural slope angle.
  • the invention aims to avoid these disadvantages and to provide a working method mentioned in the beginning, which is quantitatively (greater capacity) and qualitatively (better homogenizing effect) superior to the known method.
  • the characteristic of the method is that the supply apparatus rotates in one direction with a uniform motion in a closed path, because of the catch plate or gutter also rotating with uniform motion around the same center line as the supply apparatus, however, with a considerably lower revolution velocity, and because of reclaiming the material from the catch plate or gutter at a spatial fixed position.
  • the material to be homogenized often comes from a pile dug by a reclaimer.
  • the particle material discharged by the reclaimer upon a belt conveyor going to the homogenizing installation often has one or more cyclically returning properties, such as Si percentage, pellet size.
  • the reclaimer contains a digging wheel provided with buckets having not only an intermittent displacement in length direction of the pile, but also a back and forth movement in transverse direction of the pile, the length of time in which the cyclical properties will return (period time) will be equal to the length of'time during which the digging wheel executes its back and forth movement.
  • the cyclical time will be equal to the time which the drum requires to cover the distance between two subsequent rows of buckets (revolution time divided by number of buckets).
  • the inhomogeneity of the material is determined by the largest deviations (peaks) with regard to the average in a cyclically returning period.
  • the execution of the above-mentioned method aims to control the homogenization in such a way that from subsequent supplied periods (of the cyclically returning phenomenon) quantities of the corresponding part of the periods are never discharged together on the catch plate or gutter, so that the homogenization always has a maximum effect.
  • revolution time of the rotating catch plate or gutter must equal the period time of the cyclically returning properties.
  • the period time that is spoken of here is equal to the product of one or a whole number of times and the minimum period time of the cyclically returning phenomenon.
  • the quantity on the catch plate or gutter will be half as much as the quantity of material in one cyclically returning period of the supply.
  • the reclaimed material will also show cyclically returning properties, but the maximum deviation with respect to the average will be considerably decreased.
  • the degree depends on the relationship between the number of revolutions per minute of the supply apparatus and the number of revolutions per minute of the catch plate or gutter. This relationship must have a high value preferably at least 50.
  • the invention relates to an apparatus which can execute the described method, which is provided by a supply apparatus rotatable around a vertical shaft and a catch plate or gutter, on which the'particle material can be discharged layer by layer in a ring-shaped pile and a reclaiming apparatus to reclaim the material according to the natural slope angle from the mentioned pile, as is known from the Dutch Pat. No. 127 762.
  • This apparatus is characterthe same center line as the supply apparatus and the reclaiming apparatus of the total apparatus having a fixed position.
  • a spreading cone is located between the supply apparatus and the catch plate or gutter. In that case the radius of the supply apparatus can be small with regard to the axis of rotation.
  • the material discharged near the top of the cone onto the cone slides along the cone surface in the direction of the catch plate or gutter.
  • the spreading cone can consist of hard steel but in order to prevent unnecessary wear the spreading cone consists preferably of particle material discharged on a plate.
  • the plate which forms I the spreading cone can have an opening which can be FIG. 2 shows an unfolded ring-shaped pile built up out of layers formed by the homogenisator on two t seconds apart.
  • FIG. 3 gives a side view of the homogenizing apparatus.
  • FIG. 4 gives a top view.
  • FIG. 1 shows a pile 1 consisting of inhomogenous material. This pile gives a perspective view of the top.
  • the pile is dug off by a rotating digging wheel 2 provided with buckets, moving from side to side and which at each turn moves forward over a length corresponding with the desired depth of the cut.
  • Rotating digging wheel 2 is of conventional type as shown in US. Pat. No. 3,069,027. Its operation and the path of removal and movement of the material operated in are clearly shown and described in said patent.
  • the reclaimed material is discharged by the wheel 2 upon a conveyor 3 axially stretching through it and is subsequently transported via a number of conveyors 4, 5 and 6 to a homogenizing apparatus.
  • This homogenizing apparatus has a relatively fast rotating supply apparatus 8, a spreading cone shaped on a plate 9, a relatively slowly rotating catch gutter l 1 and a material extractor 12 rotating around a fixed shaft put into a slit of the catch gutter as previously mentioned on page 4 (beginning at line 16) the spreading cone may either be a cone shaped mechanical element formed of hard material such as steel, or it may be formed from the particle material discharged onto plate 9 as shown in FIG. 1.
  • This extractor deposits the homogenized material on a conveyor 13.
  • plate 9 rotates with the catch gutter 11.
  • the supply apparatus 8 rotates at a constant speed. It discharges at a radius, from its axis of rotation, which is small in comparison to the radius of plate 9 so that the material ends up near the top of the cone 10.
  • the centrifugal acceleration forces which are generated in the supply apparatus 8 will then also be small.
  • the material slides along the slowly rotating cone 10 on the plate 11 and ends up with little kinetic energy.
  • Layers are shaped of which the number depends on the relationship of the number of revolutions of the supply 8 with respect to the number of revolutions of plate 11.
  • the material supplied to the homogenisator often has periodical characteristics. When for instance the pile l is divided into strips a thru j, these strips can be found as indicated on the conveyors 4, 5 and 6.
  • the minimum period of the periodical characteristics (Si0 percentage, pellet size, etc.) will in this case have a length A.
  • the supply 8 rotating very fast with respect to the catch plate 11, the strips a thru j will be divided over many layers, which can be seen in FIG. 1.
  • P is the fixed material extractor point.
  • the outflow direction is indicated by an arrow. The direction approximates the natural slope angle.
  • the revolution time of plate 11 must therefore be equal to the period time of the cyclically returning properties, whereby the period time is the product of one or a whole number of times and the minimum time of the cyclically returning phenomenon.
  • FIG. 2 A possible ordering of material from the strips a thru j is shown in FIG. 2. It is clearly shown that no addition of deviations with respect to the average has taken place. The homogenization effect is-always at its maximum;
  • a batch is the quantity in one period A.
  • FIGS. 3 and 4 show some constructive details of the homogenizing apparatus according to the invention.
  • the catch plate 11 is by supports l4 connected with plate 9.
  • plate 11 The whole of plate 11, supports 14 and plate 9 are borne on a component 16 and are driven by a motor and transmission not illustrated.
  • a ringshaped gutter is bounded by two concentrical upright walls 17, 18 mounted on theaxis of revolution.
  • Material that is discharged from conveyor 6 ends up on the ring shaped gutter 25 and moves into apparatus 8 which has a side opening.
  • the same motor is best used for plate 11 and supply 8. It is desirable in order to be able to adjust the relationship between the number of revolutions on plate 11 and apparatus 8, that the transmission ratio is adjustable.
  • the extractor of the material 12 consists of a rotating plow feeder.
  • Plow Feeder 12 rotates about the axis of rotation shown in FIG. 3 to remove material 12 in a conventional manner, pushing same into the chute shown onto conveyor 13.
  • the propelling motor is not illustrated.
  • the spreading cone shaped by particle material can consist of steelplate.
  • this cone can be stationary, but for constructive reasons it is better that it is connected with the rotating plate 11.
  • a working method for the homogenizing of particle material comprsing a. rotating a particle supply apparatus at a predetermined speed in a closed circuit and with a uniform motion about a predetermined axis of rotation;
  • the working method of claim 4 including depositing said particle material upon a spreading cone plate to form said spreading cone.
  • the working method of claim 5 including providing an opening in said spreading cone plate and a closure for said opening such that when said closure is opened a short-circuit is provided between said supply apparatus and an outlet for the particle material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Discharge Of Articles From Conveyors (AREA)
US300877A 1971-10-25 1972-10-25 Working method for homogenizing particle material Expired - Lifetime US3866885A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7114653A NL7114653A (ja) 1971-10-25 1971-10-25

Publications (1)

Publication Number Publication Date
US3866885A true US3866885A (en) 1975-02-18

Family

ID=19814326

Family Applications (1)

Application Number Title Priority Date Filing Date
US300877A Expired - Lifetime US3866885A (en) 1971-10-25 1972-10-25 Working method for homogenizing particle material

Country Status (8)

Country Link
US (1) US3866885A (ja)
JP (1) JPS5336180B2 (ja)
AU (1) AU4803672A (ja)
DE (1) DE2251457C3 (ja)
FR (1) FR2157926A1 (ja)
IT (1) IT969894B (ja)
NL (1) NL7114653A (ja)
ZA (1) ZA727416B (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2497740C2 (ru) * 2011-12-02 2013-11-10 Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" Способ усреднения сыпучего материала
CN108059003A (zh) * 2016-11-09 2018-05-22 中冶宝钢技术服务有限公司 一种使用堆取料机进行物料堆积的方法
US20180339871A1 (en) * 2017-05-23 2018-11-29 Northwestern University Devices for and Methods of Forming Segregated Layers from Mixtures of Granular Materials

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107537384B (zh) * 2017-10-17 2019-11-01 太和县腾发淀粉有限公司 一种液态食品的冷却震荡均匀装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3336006A (en) * 1965-10-24 1967-08-15 Paul O Berg Apparatus for mixing granular, powdered and the like materials

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3336006A (en) * 1965-10-24 1967-08-15 Paul O Berg Apparatus for mixing granular, powdered and the like materials

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2497740C2 (ru) * 2011-12-02 2013-11-10 Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" Способ усреднения сыпучего материала
CN108059003A (zh) * 2016-11-09 2018-05-22 中冶宝钢技术服务有限公司 一种使用堆取料机进行物料堆积的方法
US20180339871A1 (en) * 2017-05-23 2018-11-29 Northwestern University Devices for and Methods of Forming Segregated Layers from Mixtures of Granular Materials
US10926966B2 (en) * 2017-05-23 2021-02-23 Northwestern University Devices for and methods of forming segregated layers from mixtures of granular materials

Also Published As

Publication number Publication date
DE2251457A1 (de) 1973-05-10
JPS5336180B2 (ja) 1978-09-30
AU4803672A (en) 1974-04-26
ZA727416B (en) 1974-05-29
IT969894B (it) 1974-04-10
DE2251457B2 (ja) 1974-05-22
DE2251457C3 (de) 1975-01-16
NL7114653A (ja) 1973-04-27
JPS4851359A (ja) 1973-07-19
FR2157926A1 (ja) 1973-06-08

Similar Documents

Publication Publication Date Title
US3866885A (en) Working method for homogenizing particle material
CH429493A (de) Verfahren und Vorrichtung zur Oberflächenbehandlung kleiner Werkstücke
US4244463A (en) Conveyor apparatus
US3944053A (en) Conveyor systems
US2618472A (en) Transit concrete mixer
US3018059A (en) Process and an apparatus for mixing and comminuting materials
US3913761A (en) Method and apparatus for homogenizing, stockpiling and sampling particulate materials
US2309970A (en) Process of manufacturing carbon black
US2970782A (en) Machine for disintegrating a block of compressed fibrous and like material
US1541163A (en) Centrifugal drier
US2080508A (en) Mixing and screening apparatus for fertilizer materials and the like
US2947026A (en) Treating ore concentrates
US2923965A (en) Pelletizing apparatus
US3476296A (en) Conveying apparatuses
EP0637543B1 (en) Volumetric dosage machine particularly for granulates, powders and loose products in general
US3937446A (en) Apparatus for mixing of building materials
US2810558A (en) Concrete mixers
US3250131A (en) Sampling devices for bulk materials
US4100617A (en) Mixing and discharge apparatus
US1332938A (en) Mixing apparatus
RU2132723C1 (ru) Агрегат для смешения сыпучих материалов
US2651404A (en) Machine for applying coatings
CN217971687U (zh) 一种石灰石入库装置
US2826794A (en) Apparatus for the preparation and mixing of foundry moulding materials
US2559899A (en) Apparatus for treating solids and/or liquids