WO2017072571A1 - Procédé de production d'une composition de ciment - Google Patents

Procédé de production d'une composition de ciment Download PDF

Info

Publication number
WO2017072571A1
WO2017072571A1 PCT/IB2016/001487 IB2016001487W WO2017072571A1 WO 2017072571 A1 WO2017072571 A1 WO 2017072571A1 IB 2016001487 W IB2016001487 W IB 2016001487W WO 2017072571 A1 WO2017072571 A1 WO 2017072571A1
Authority
WO
WIPO (PCT)
Prior art keywords
portland cement
cement powder
mass flow
added
added component
Prior art date
Application number
PCT/IB2016/001487
Other languages
English (en)
Inventor
Alexander BRÄUNINGER
Original Assignee
Holcim Technology Ltd
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 Holcim Technology Ltd filed Critical Holcim Technology Ltd
Publication of WO2017072571A1 publication Critical patent/WO2017072571A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0032—Controlling the process of mixing, e.g. adding ingredients in a quantity depending on a measured or desired value
    • 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
    • B01F23/69—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
    • 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
    • B28C7/0404—Proportioning
    • B28C7/0413—Proportioning two or more flows in predetermined ratio
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the invention refers to a method of producing a cement composition, which comprises Portland cement and at least one added component .
  • the invention refers to an installation for carrying out this method.
  • Today portland cement is the most common type of cement. This cement is made by calcining limestone with other materials, such as clay to 1450 °C in a kiln. The resulting clinker is ground in a cement mill with a small amount of gypsum into a powder to make Ordinary Portland Cement
  • Portland cement is often blended with various mineral components in order to obtain composite Portland cements or Portland cement blends.
  • Chemical additives or admixtures may be added depending on the application intended.
  • the following types of mineral components may be added to Portland cement in order to obtain composite cements.
  • Granulated blast-furnace slag (gbfs) , fly ash, natural pozzolans, calcined clays or ground limestone are usually added to Portland cement in order to replace a partial amount of Portland cement.
  • ultra-fine mineral components such as microcement or microsilica
  • Portland cement is used to enhance the durability and the strength of the resulting concrete .
  • Chemical additives or admixtures may also be added to said composite cement, such as grinding aids, air entrainers, retarders, activators, expansion agents, coloring agents and/or water repellent additives.
  • Composite cements are usually produced by mixing clinker and mineral components, in particular granulated blastfurnace slag, fly ash, natural pozzolans and calcined clays, before feeding them to the cement mill.
  • the ground composite cement is then stored in cement silos located at the cement manufacturing plant before being conveyed to a packing installation or to a loading station for loading the composite cement to a transport vehicle. Co-grinding the clinker and the mineral components results in large quantities of composite cement being produced in an
  • composition of the cement composition in particular with regard to the type and amount of the added components, such as mineral components and/or chemical additives to be added.
  • the production shall be cost and time efficient also in case that only a small amount of a specific composite cement composition is needed.
  • the invention provides for a method of producing a cement composition, which comprises Portland cement and at least one added component, comprising the steps of
  • a container in particular a silo of a cement manufacturing plant, conveying the Portland cement powder to a packing station or a loading installation for loading a cement composition to a transport vehicle,
  • the invention is based on the idea to manufacture cement compositions, such as composite cements, by dosing at least one added component, such as a mineral component and/or a chemical additive, to already pre- manufactured Portland cement powder.
  • the at least one added component is added to the Portland cement powder during the conveying step, in which the Portland cement is conveyed from the storing site, such as a silo, to a packing station for packing the product into bags or to a loading
  • the mass flow of Portland cement powder that is conveyed from the storage container is measured and the feeding of the at least one added component is
  • the measuring of the mass flow of the cement powder can, e.g., be realized by a mass flow meter
  • Tis device works according to the principle of the Coriolis force.
  • the cement powder hits a rotating measuring wheel. Due to the centrifugal force, the cement powder on the vane is moved outwards. On the measuring wheel - due to the acceleration in the direction of the circumference - the cement powder is subject to the Coriolis force. This can be recorded as a measurable variable which is proportional to the
  • the dosed feeding of the at least one added component to the cement powder may, e.g. be realized by means of a feeding unit distributed by Schenck Process GmbH, Darmstadt (Germany) , under the trade name Mechatron®.
  • the Portland cement powder is conveyed as a continuous stream, preferably using a screw conveyor, a belt conveyor or an air activated gravity conveyor. Further, the at least one added component is preferably continuously added to the continuous stream of Portland cement powder.
  • an on-line blending process may be realized, which allows a continuous mode of operation.
  • the precise dosing of the at least one added component to the stream of cement powder is preferably achieved by controlling the feeding rate of the added component.
  • the amount of the at least one continuously added component is controlled by feeding the at least one component to the stream of Portland cement powder at a feeding rate being controlled as a function of the mass flow of Portland cement powder.
  • the feeding rate is controlled exclusively as a function of the mass flow of Portland cement powder. This means, that the mass flow of Portland cement powder is the only parameter used in order to adapt the feeding rate of the at least one added component.
  • the feeding rate is controlled as a function of the mass flow of Portland cement powder so as to obtain a predetermined mass ratio of Portland cement powder and added component (s) in the cement composition.
  • the at least one additive is fed to the Portland cement powder by means of a gravimetric feeder, such as a feeding unit distributed by Schenck Process GmbH, Darmstadt (Germany) , under the trade name Mechatron®.
  • Cement compositions frequently contain more than one added component.
  • the addition of more than one added component to the Portland cement powder conveyed from the storage container to the packing or loading station may be realized in various ways. One possibility is to produce a premix containing two or more added components in the required mass ratio and to add the premix to the flow of cement powder during the conveying step by means of a suitable installation, such as a feeder as described above.
  • the two or more added components are separately and independently added to the cement powder.
  • two or more added components are added to said Portland cement powder during said conveying step so as to obtain a cement composition, the added amount of said two or more added components each being separately
  • each added component is separately controlled as a function of the mass flow of Portland cement powder so as to each obtain a predetermined mass ratio of Portland cement powder and the respective added component in the cement
  • the at least one added component is a mineral component and/or a chemical additive or admixture.
  • the mineral component may preferably be selected from the group consisting of ground granulated blast furnace slag, fly ash, natural pozzolans, ground limestone, silica fume, calcined clays and mixtures thereof .
  • the chemical additive or admixture may preferably be selected from the group consisting of grinding aids, air entrainers, retarders, activators, expansion agents, coloring agents and water repellent additives.
  • the invention refers to an installation for carrying out the inventive method.
  • the installation comprises a container, in particular a silo, for storing Portland cement powder, conveying means for conveying the Portland cement powder to a packing station or a loading installation for loading a cement composition to a transport vehicle, a mass flow meter for measuring the mass flow of Portland cement powder being conveyed by means of said conveying means and a feeding device for feeding at least one added component to said Portland cement powder being conveyed by means of said conveying means, said feeding device being configured to control the amount of said at least one added component being fed as a function of the mass flow of Portland cement powder.
  • said conveying means is designed to
  • an air activated gravity conveyor is preferred, such as the
  • Airslide® conveying system marketed by FLSmidth. This conveying system is based on the idea to fluidize the material to be conveyed with air, in order to enable to use the forces of gravity to do most of the conveying work without any moving parts. In particular, driving low- pressure, low-velocity air through and between particles of the dry bulk material to be conveyed changes its behavior characteristics and makes it flow more like a liquid than a solid.
  • said feeding device is a gravimetric feeder configured to continuously feed said at least one added component to the. flow of Portland cement powder.
  • a preferred embodiment provides for a control unit, to which a measuring signal representative of the mass flow measured by the flow meter is fed and which is connected to the feeding device in order to control the feeding rate of the feeding device as a function of the mass flow of Portland cement powder so as to obtain a predetermined mass ratio of Portland cement powder and added component (s) in the cement composition .
  • the inventive installation preferably comprises two or more feeding devices, each feeding device being configured to control the amount of the respective added component being fed as a function of the mass flow of Portland cement powder.
  • Fig. 1 two silos 1 are shown, in which Portland cement powder is stored. In their bottom region the silos 1 have outlet openings for discharging cement powder into a first conveying means 2, in which the cement powder coming from the silos 1 is merged into a single stream of cement powder that is charged onto a second conveying means 3.
  • the silos 1 may have stored cement powder having product
  • the second conveying means 3 is preferably designed as an air activated gravity conveyor and continuously conveys the cement powder to a loading section 5 of continuous vertical conveyor 4.
  • the vertical conveyor 4 conveys the cement powder via a hopper 6 and an intermediate storage container 7 to a packing unit generally denoted by 8, in which the product is filled into bags. Excessive material is
  • a conveying and packing installation as described above is commonly used at cement manufacturing plants around the world. According to the invention, such known installation is adapted to achieve an on-line blending of additives as follows .
  • a branching section 11 is installed in the conveying means 3, which allows branching off a stream of cement powder, which is conveyed via a conveyor 12 to a mass flow meter 13, which measures the mass flow of cement powder.
  • the measurements continuously obtained from the mass flow meter 13 are used to control the feed rate of an added component that is added to the cement stream at a blending point 14 downstream of the mass flow meter 13.
  • the added component is stored in bags 15 and charged into a hopper 16 of a screw conveyor 17.
  • the screw conveyor 17 discharges the added component into a gravimetric feeder 18 that controls the feeding rate of the added component as a function of the mass flow measurement data received from the mass flow meter 13.
  • a cement composition having a desired composition is obtained.
  • the cement composition is charged onto a conveyor 19, which conveys the cement composition to a loading section 5 of the continuous vertical conveyor 4.
  • the cement composition is then packed into bags as
  • the installation illustrated in Fig. 1 may thus be used to either convey the cement powder contained in silos 1 to the packing station 8 or the cement composition obtained as described above, depending on whether the branching section is active to divert the cement powder stream to the

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

La présente invention concerne un procédé de production d'une composition de ciment qui comprend du ciment Portland et au moins un composant ajouté, comprenant les étapes consistant à - stocker de la poudre de ciment Portland dans un récipient (1), en particulier un silo d'une cimenterie, - transporter la poudre de ciment Portland à une station d'emballage (8) ou une installation de chargement pour charger une composition de ciment sur un véhicule de transport, - mesurer le débit massique de poudre de ciment Portland pendant ladite étape de transport, - ajouter le au moins un composant ajouté à ladite poudre de ciment Portland pendant ladite étape de transport afin d'obtenir une composition de ciment, la quantité ajoutée dudit au moins un composant ajouté étant régulée en fonction du débit massique de poudre de ciment Portland.
PCT/IB2016/001487 2015-10-29 2016-10-17 Procédé de production d'une composition de ciment WO2017072571A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MXMX/A/2015/015097 2015-10-29
MX2015015097A MX2015015097A (es) 2015-10-29 2015-10-29 Procedimiento de produccion de una composicion de cemento.

Publications (1)

Publication Number Publication Date
WO2017072571A1 true WO2017072571A1 (fr) 2017-05-04

Family

ID=57249836

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2016/001487 WO2017072571A1 (fr) 2015-10-29 2016-10-17 Procédé de production d'une composition de ciment

Country Status (2)

Country Link
MX (1) MX2015015097A (fr)
WO (1) WO2017072571A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109664405A (zh) * 2018-12-26 2019-04-23 科顺防水科技股份有限公司 一种聚合物水泥防水砂浆的生产工艺
CN110405945A (zh) * 2019-08-02 2019-11-05 诸暨高宗自动化科技有限公司 一种水利工程用抗冲磨混凝土生产装置
CN111993599A (zh) * 2020-08-19 2020-11-27 中国水电基础局有限公司 一种全自动多通道制送浆系统及工艺
CN115532399A (zh) * 2021-12-26 2022-12-30 山东天汇科技有限公司 一种水泥粉磨及助磨剂自动加料工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111531717B (zh) * 2020-04-30 2021-03-19 临海市强广建材股份有限公司 一种水泥混凝土制备系统及其制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3182096B2 (ja) * 1996-10-14 2001-07-03 三岐通運株式会社 多品種セメント混合粉体の生成供給方法と、それに用いる生成供給装置
EP1508417A1 (fr) * 2003-07-24 2005-02-23 Services Petroliers Schlumberger Système de mélange
GB2459929A (en) * 2008-05-14 2009-11-18 Campbell Brown Method and Apparatus for Preparing Dry Mortar
US20100247702A1 (en) * 2007-05-14 2010-09-30 Rompypaz Engineering Ltd. Systems and methods for a controlled process for producing mixtures of lightweight construction materials and systems for automatic production of lightweight bricks
AT11796U1 (de) * 2010-03-11 2011-05-15 Holcim Technology Ltd Verfahren zur herstellung von mischzementen
US20140216302A1 (en) * 2013-02-04 2014-08-07 Robert W. Ober Atmospheric Storage Mechanical Weight Batch Blending Plant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3182096B2 (ja) * 1996-10-14 2001-07-03 三岐通運株式会社 多品種セメント混合粉体の生成供給方法と、それに用いる生成供給装置
EP1508417A1 (fr) * 2003-07-24 2005-02-23 Services Petroliers Schlumberger Système de mélange
US20100247702A1 (en) * 2007-05-14 2010-09-30 Rompypaz Engineering Ltd. Systems and methods for a controlled process for producing mixtures of lightweight construction materials and systems for automatic production of lightweight bricks
GB2459929A (en) * 2008-05-14 2009-11-18 Campbell Brown Method and Apparatus for Preparing Dry Mortar
AT11796U1 (de) * 2010-03-11 2011-05-15 Holcim Technology Ltd Verfahren zur herstellung von mischzementen
US20140216302A1 (en) * 2013-02-04 2014-08-07 Robert W. Ober Atmospheric Storage Mechanical Weight Batch Blending Plant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109664405A (zh) * 2018-12-26 2019-04-23 科顺防水科技股份有限公司 一种聚合物水泥防水砂浆的生产工艺
CN110405945A (zh) * 2019-08-02 2019-11-05 诸暨高宗自动化科技有限公司 一种水利工程用抗冲磨混凝土生产装置
CN111993599A (zh) * 2020-08-19 2020-11-27 中国水电基础局有限公司 一种全自动多通道制送浆系统及工艺
CN115532399A (zh) * 2021-12-26 2022-12-30 山东天汇科技有限公司 一种水泥粉磨及助磨剂自动加料工艺

Also Published As

Publication number Publication date
MX2015015097A (es) 2017-04-28

Similar Documents

Publication Publication Date Title
WO2017072571A1 (fr) Procédé de production d'une composition de ciment
CN101462310B (zh) 一种干混砂浆站
US20150103614A1 (en) Apparatus and method for a concrete plant
CN101879755A (zh) 免烘干干混砂浆成套设备
PL136035B1 (en) Cement manufacturing method and apparatus therefor
CN207656946U (zh) 一种干粉砂浆配料系统
RU2011148083A (ru) Высококачественный цемент и способ его производства
CN204412193U (zh) 自动配料系统
CN201313347Y (zh) 一种干混砂浆站
US3300193A (en) Control apparatus for material mixers
CN208917087U (zh) 干混砂浆生产系统
JPH10287461A (ja) コンクリートとその施工方法および施工装置
WO1996001175A1 (fr) Procede de preparation d'un melange
CN106565177A (zh) 一种环保型工业废弃物特种抗裂干混砂浆及其制备方法
CN102910461A (zh) 一种脱硫灰长时间储存及精确下料方法
US20100294170A1 (en) Method and installation for producing multi-component cements
CN105601137B (zh) 利用至少两种粉体生产胶凝材料的设备及方法
JP6729237B2 (ja) 原料配合装置及び原料配合方法
CN214819591U (zh) 一种混凝土搅拌站
CN201569280U (zh) 水泥回转窑的窑灰处理装置
JPH11262650A (ja) 粉体の自動造粒装置
JP2001105423A (ja) コンクリートの製造方法およびコンクリートの製造装置
JP4781513B2 (ja) コンクリートの製造方法及びコンクリートの製造装置
CN208906913U (zh) 一种定量给料机
CN111499234A (zh) 一种改进的生料配料方式

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16791669

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16791669

Country of ref document: EP

Kind code of ref document: A1