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WO1996001175A1 - Procede de preparation d'un melange - Google Patents

Procede de preparation d'un melange Download PDF

Info

Publication number
WO1996001175A1
WO1996001175A1 PCT/GB1995/001564 GB9501564W WO9601175A1 WO 1996001175 A1 WO1996001175 A1 WO 1996001175A1 GB 9501564 W GB9501564 W GB 9501564W WO 9601175 A1 WO9601175 A1 WO 9601175A1
Authority
WO
WIPO (PCT)
Prior art keywords
particulate material
powder material
mix
dispensing
holding bin
Prior art date
Application number
PCT/GB1995/001564
Other languages
English (en)
Inventor
Brent Swaisland
Original Assignee
Mass Measuring Systems Limited
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
Priority claimed from GB9413514A external-priority patent/GB9413514D0/en
Priority claimed from GB9414250A external-priority patent/GB9414250D0/en
Application filed by Mass Measuring Systems Limited filed Critical Mass Measuring Systems Limited
Priority to AU28033/95A priority Critical patent/AU2803395A/en
Publication of WO1996001175A1 publication Critical patent/WO1996001175A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
    • B28C7/062—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors with a pneumatic or hydraulic conveyor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/60—Mixing solids with solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C9/00—General arrangement or layout of plant
    • B28C9/02—General arrangement or layout of plant for producing mixtures of clay or cement with other materials

Definitions

  • This invention relates to a method for preparing a mix comprising adherent powder material and particulate material using mechanical and/or pneumatic conveying equipment at risk of blocking by the powder material.
  • the invention is particularly useful in connection with the preparation of cementitious concrete, mortar or asphalt mixes containing one or more powder pigments.
  • Powdered pigments are notoriously difficult materials to handle and readily block pneumatic and mechanical conveying lines. For this reason, the pigments are processed by their manufacturers to enable them to be presented in a granular form which does not have the problems associated with untreated powders. However, such treatment is costly, typically doubling the price of the pigment.
  • the granular material can, through handling, itself partly revert to powder form, and then requires special measures to avoid the powder fraction blocking the conveyor means.
  • DE-38 34 191-A discloses an arrangement for automatically dispensing, to cement and mortar mixes, dry pigment in granular form but of which a fraction is of diameter substantially smaller than 1mm.
  • Pigment is dispensed from a holding silo through an outlet duct into a weighing hopper via coarse-and fine-feeding dispensers. From the weigh container the pigment drops to an inlet to a pneumatic hose.
  • sand can be added to the pigment stream in the region of the weighing container. The precise arrangements for adding sand to the pigment stream are not disclosed, and it is clear that substantial modification, the nature of which is not even hinted at, would need to be made to the equipment for this purpose.
  • the sand As the sand is introduced in the region of the weighing hopper, it will either not be weighed at all or it will be weighed along with the pigment and only the total weight of pigment and at best added sand will be known, which will introduce uncertainties into the final mix ratio, unless only such small quantities of sand are to be added as will have no effect on fully powdered pigment.
  • the present invention provides methods and apparatus for preparing a mix of the materials in question which do not suffer from these problems.
  • the invention comprises a method for preparing a mix comprising adherent powder material and particulate material using mechanical and/or pneumatic conveying equipment at risk of blocking by the powder material comprising preparing a pre-mix of all the powder material and at least some of the particulate material before introduction of the powder material to the conveying equipment, such premix being in such known proportions as will be handleable by the equipment without risk of blocking.
  • the powder material may comprise a pigment, while the particulate material may comprise sand, but, of course, the method is generally applicable to powders and particulates of other materials.
  • the method is, however, particularly well adapted to preparing a cementitious concrete, mortar or asphalt mix.
  • the method may in particular comprise the steps of :
  • the content of the holding bin may be conveyed by suction.
  • the materials may be fed to the holding bin from hoppers by means of screw conveyors, which may be controlled in response to weight loss from the hoppers.
  • the weight loss may be sensed by load cells on which the hoppers are mounted.
  • the hoppers may be supplied by big bag dischargers or by bin dischargers.
  • More than one adherent powder may be dispensed to the holding bin, which may itself supply a plurality of mixers by valve arrangements.
  • particulate material may be dispensed to move towards pneumatic conveying equipment and then powder material dispensed on to said moving particulate material. Both materials may be dispensed from loss-in-weight feeders.
  • the materials may slide down an inclined chute to said pneumatic conveying equipment, or on a belt or like conveyor. Said materials may then drop into an upwardly-directed open end of a suction pipe, which may have a vibrator arrangement.
  • the invention also comprises a mix prepared by a method as described and also comprises a pre-mix comprising powder and particulate material used in a method as described.
  • the premix may be bagged, so that it may be fed straight into a pneumatic conveyor, or a mechanical conveyor likely to be blocked by pure powder pigment. This obviates the need to provide special equipment at the mixing plant where the concrete, mortar or asphalt mix is prepared.
  • Suitable pigment : sand ratios are between 4:1 and 1:1, lower density pigments needing relatively more sand. Ratios outside this range could, of course, be used. For bagged pre mix which is to be transported to a concrete mixing plant it would be uneconomic to use larger amounts of sand than necessary.
  • the invention also comprises apparatus for preparing a mix comprising adherent powder material and particulate material using mechanical and/or pneumatic conveying equipment at risk of blocking by the powder material, comprising pre-mixing means for preparing a pre-mix of all the powder material and at least some of the particulate material before introduction of the powder material to the conveying equipment in known proportions such that the pre-mix will be handleable by the equipment without risk of blocking.
  • the apparatus may comprise:
  • powder material dispensing means dispensing the powder material in measured quantity to said holding bin
  • particulate material dispensing means dispensing the particulate material in measured quantity to said holding bin
  • particulate material dispensing means dispensing any further particulate material required to said mixer.
  • Figure 1 is a diagrammatic side elevation of a first embodiment
  • Figure 2 is a diagrammatic plan view of a detail of Figure 1
  • Figure 3 is a diagrammatic side elevation of a second embodiment.
  • the drawings illustrate apparatus for preparing a mix comprising adherent powder material and particulate material using mechanical and/or pneumatic conveying equipment 15, 16, 19, 33 at risk of blocking by the powder material, comprising pre- mixing means 10, 11, 12, 13, 14 for preparing a pre-mix ofall the powder material and at least some of the particulate material before introduction of the powder material to the conveying equipment 15, 16, 19, 33 in known proportions such that the pre-mix will be handleable by the equipment without risk of blocking.
  • Figures 1 and 2 illustrate a plant comprising a plurality (in this example four) of big bag dischargers 10 each able to supply a hopper 11 situated therebeneath.
  • Three of the dischargers 10 supply different powdered pigments whilst the fourth supplies sand.
  • Screw conveyors 12 are provided to dispense the contents of the hoppers 11 in measured quantities to a holding bin 13.
  • the screw conveyors 12 are controlled by a micro-processor (not shown) in response to loss of weight from the hoppers 10 sensed by load cells 14 upon which the hoppers 10 are mounted.
  • the contents of the holding bin 13 may be conveyed through one or other of two lines 15 and 16 to one or other of two bin dischargers 17 and 18 by vacuum suction.
  • a vacuum pump 19 is provided for exhausting the selected bin.
  • Selection valves 20 and 21 are provided between the pump 19 and bins of the dischargers 17 and 18 and further selection valves 22 and 23 are provided in the lines 15 and 16.
  • Filters 24 are provided to ensure that the conveyed material is retained within the system.
  • Each of the bin dischargers 17 and 18 feeds an associated mixer 25 and 26 respectively to which the remaining ingredients required for the mix including the balance (if any) of the sand are added.
  • Figure 3 illustrates a particulate material dispenser 31 dispensing particulate material on to a material moving arrangement 32 which moves it towards pneumatic conveying equipment 33 and powder material dispensing means 34 dispensing powder material on to particulate material moving towards said equipment 33.
  • Said material moving arrangement 32 may be simply an inclined chute or a belt or like conveyor which drops the material into a upwardly directed open end 35 of a suction pipe of the equipment33 which is provided with a vibrator 36.
  • the powder dispensing means 36 comprises five loss-in-weight dispensers and the particulate material dispenser 31 is also a loss-in-weight dispenser mounted on load cells 31a.
  • the mixture of pigment powders and sand can be conveyed pneumatically with ease and further that the act of conveying by vacuum suction serves to blend the pigments and sand thoroughly.
  • the invention includes within its scope intermediates for use in preparation of cemetitious concrete, mortar or asphalt mixes comprising mixtures of powdered pigment and sand. Such may be prepared at a central facility and bagged for use elsewhere.
  • pigment powders may be dispensed to the holding bin which may be adapted to discharge into a single or selected one of more than two process lines.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Accessories For Mixers (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

Procédé de préparation d'un mélange comprenant de la matière pulvérulente adhérente et de la matière particulaire, à l'aide d'une installation d'acheminement mécanique et/ou pneumatique risquant d'être bloquée par la matière pulvérulente. Le procédé de cette invention consiste à préparer un prémélange renfermant toute la matière pulvérulente et au moins une partie de la matière particulaire avant d'introduire la matière pulvérulente dans l'installation d'acheminement, ce prémélange étant réalisé suivant des proportions telles qu'il puisse être manipulé par ladite installation sans que cette dernière ne risque de se bloquer.
PCT/GB1995/001564 1994-07-05 1995-07-03 Procede de preparation d'un melange WO1996001175A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU28033/95A AU2803395A (en) 1994-07-05 1995-07-03 Method for preparing a mix

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9413514A GB9413514D0 (en) 1994-07-05 1994-07-05 Method of preparing a mix
GB9413514.2 1994-07-05
GB9414250.2 1994-07-14
GB9414250A GB9414250D0 (en) 1994-07-14 1994-07-14 Preparing a mix

Publications (1)

Publication Number Publication Date
WO1996001175A1 true WO1996001175A1 (fr) 1996-01-18

Family

ID=26305205

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/001564 WO1996001175A1 (fr) 1994-07-05 1995-07-03 Procede de preparation d'un melange

Country Status (3)

Country Link
AU (1) AU2803395A (fr)
GB (1) GB2291600B (fr)
WO (1) WO1996001175A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3285132A1 (fr) * 2016-08-15 2018-02-21 Jauhetekniikka Oy Kotka Procédé et appareil de distribution destiné à distribuer une poudre et/ou un matériau granulaire
CN111136259A (zh) * 2020-01-09 2020-05-12 北京毅能创投科技有限公司 一种铝粉混料方法
CN113635454A (zh) * 2021-07-21 2021-11-12 湖北望新建设有限公司 一种用于泥浆混配的负压送料机构

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9703195D0 (en) * 1997-02-15 1997-04-02 Swaisland Brent A composition comprising a fine powder
GB2356824A (en) 2000-07-04 2001-06-06 Allchem Internat Ltd Apparatus for blending and delivering pelletised additives for incorporation in asphalt
US7841849B2 (en) 2005-11-04 2010-11-30 University Of Southern California Dry material transport and extrusion
US8308470B2 (en) 2005-11-04 2012-11-13 University Of Southern California Extrusion of cementitious material with different curing rates
MX2008005842A (es) * 2005-11-04 2008-09-12 Univ Southern California Sistema de abastecimiento de material que utiliza acumulador de desacoplamiento.
CN101549262B (zh) * 2009-05-07 2011-08-17 美通重机有限公司 一种双桶式沥青与胶粉混合器
CN201598835U (zh) * 2009-12-29 2010-10-06 三一重工股份有限公司 用于砂浆车的沥青存储系统及砂浆车
CN102979027A (zh) * 2012-11-12 2013-03-20 南阳市亚龙筑路机械制造有限公司 一种多用连续式搅拌设备
CN105664751A (zh) * 2016-03-30 2016-06-15 佛山市宝岩机器制造有限公司 一种高速混料着色的配料装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3834191A1 (de) * 1988-10-07 1990-04-12 Brockhues Chem Werke Ag Vorrichtung und verfahren zum automatischen dosieren trockener pigmente in einen beton- oder moertelmischer
EP0394785A1 (fr) * 1989-04-26 1990-10-31 SAMI S.N.C. DI BERTOLINI CLAUDIO & C. Moyens et procédé pour colorer automatiquement du béton

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2544441A1 (de) * 1975-10-04 1977-04-14 Motan Gmbh Vorrichtung zum mischen von granulatund/oder pulverfoermigen stoffen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3834191A1 (de) * 1988-10-07 1990-04-12 Brockhues Chem Werke Ag Vorrichtung und verfahren zum automatischen dosieren trockener pigmente in einen beton- oder moertelmischer
EP0394785A1 (fr) * 1989-04-26 1990-10-31 SAMI S.N.C. DI BERTOLINI CLAUDIO & C. Moyens et procédé pour colorer automatiquement du béton

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DIEM W: "MISCHANLAGEN FUER KALKSANDSTEINMASSEN - NACHMISCHANLAGEN", AUFBEREITUNGS TECHNIK, vol. 33, no. 3, 1 March 1992 (1992-03-01), pages 140 - 144, 146 - 149, XP000245396 *
MAYERHAUSER: "Saugdosierung von Pigmenten und Fuellstoffen", FARBE + LACK, vol. 1987, no. 3, HANNOVER DE, pages 207 - 210 *
TEICHMANN: "Die Dosierung von Pigmenten bei der Herstellung farbiger Betonwaren", BETONWERK + FERTIGTEIL TECHNIK, vol. 1986, no. 9, WIESBADEN DE, pages 577 - 584 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3285132A1 (fr) * 2016-08-15 2018-02-21 Jauhetekniikka Oy Kotka Procédé et appareil de distribution destiné à distribuer une poudre et/ou un matériau granulaire
EP3572904A1 (fr) 2016-08-15 2019-11-27 Jauhetekniikka Oy Kotka Procédé et appareil de distribution destiné à distribuer une poudre et/ou un matériau granulaire
CN111136259A (zh) * 2020-01-09 2020-05-12 北京毅能创投科技有限公司 一种铝粉混料方法
CN111136259B (zh) * 2020-01-09 2022-01-11 北京毅能创投科技有限公司 一种铝粉混料方法
CN113635454A (zh) * 2021-07-21 2021-11-12 湖北望新建设有限公司 一种用于泥浆混配的负压送料机构

Also Published As

Publication number Publication date
AU2803395A (en) 1996-01-25
GB9513521D0 (en) 1995-09-06
GB2291600B (en) 1996-08-07
GB2291600A (en) 1996-01-31

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