EP0210294B1 - Procédé et dispositif de préparation de suspensions à caractéristiques constantes provenant d'éléments à propriétés variables - Google Patents

Procédé et dispositif de préparation de suspensions à caractéristiques constantes provenant d'éléments à propriétés variables Download PDF

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Publication number
EP0210294B1
EP0210294B1 EP85109553A EP85109553A EP0210294B1 EP 0210294 B1 EP0210294 B1 EP 0210294B1 EP 85109553 A EP85109553 A EP 85109553A EP 85109553 A EP85109553 A EP 85109553A EP 0210294 B1 EP0210294 B1 EP 0210294B1
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EP
European Patent Office
Prior art keywords
suspension
constant
ball mill
mixing
particle size
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
Application number
EP85109553A
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German (de)
English (en)
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EP0210294A1 (fr
Inventor
Reinhard Dr. Klose
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.)
SALZGITTER ANLAGENBAU ZWEIGNIEDERLASSUNG DER PREUS
Original Assignee
Salzgitter Anlagenbau Zweigniederlassung der Preussag Anlagenbau GmbH
Salzgitter Industriebau GmbH
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8193653&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0210294(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Salzgitter Anlagenbau Zweigniederlassung der Preussag Anlagenbau GmbH, Salzgitter Industriebau GmbH filed Critical Salzgitter Anlagenbau Zweigniederlassung der Preussag Anlagenbau GmbH
Priority to EP85109553A priority Critical patent/EP0210294B1/fr
Priority to DE8585109553T priority patent/DE3563310D1/de
Priority to US06/840,445 priority patent/US4706892A/en
Priority to CA000504668A priority patent/CA1294263C/fr
Priority to ZA865440A priority patent/ZA865440B/xx
Priority to AU60475/86A priority patent/AU576092B2/en
Priority to JP61176833A priority patent/JPS6249942A/ja
Publication of EP0210294A1 publication Critical patent/EP0210294A1/fr
Publication of EP0210294B1 publication Critical patent/EP0210294B1/fr
Application granted granted Critical
Expired legal-status Critical Current

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Classifications

    • 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
    • B01F23/50—Mixing liquids with solids
    • B01F23/56—Mixing liquids with solids by introducing solids in liquids, e.g. dispersing or dissolving
    • 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
    • B01F35/82—Forming a predetermined ratio of the substances to be mixed by adding a material to be mixed to a mixture in response to a detected feature, e.g. density, radioactivity, consumed power or colour
    • 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
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/2201—Control or regulation characterised by the type of control technique used
    • B01F35/2209—Controlling the mixing process as a whole, i.e. involving a complete monitoring and controlling of the mixing process during the whole mixing cycle

Definitions

  • the invention relates to a method for producing particularly highly concentrated, fine-grained suspensions with constant characteristics from raw materials with variable properties.
  • a suspension contains, for example, fine-grained coal or fine-grained mineral and a liquid carrier. It can be used to transport the fine-grained substances in pipes or to store them in containers and to feed the solids to an application.
  • the solids to be introduced into the suspension have changing moisture contents and other properties.
  • the respective hardness of the raw material can have an influence on which grain sizes occur during the crushing to be provided.
  • the liquid carrier also affects the characteristics of the suspension when z. B. changes its temperature or its salinity.
  • Such suspensions are usually admixed with additives which can also have an influence on the characteristics of the suspension.
  • the additives are selected according to the use of the suspensions and can be surfactants, defoamers, stabilizers, biocides, etc.
  • WO 84/03297 describes a method for producing a suspension in which material to be comminuted is processed in ball mills together with carrier liquid and a dispersant. To produce the grain size distribution required here, however, at least two mills are necessary, the suspension of which, with multiple checks of viscosity, density, grain sizes, etc., may be joined together with the addition of further carrier liquid or return of parts of the suspensions in mixers, so that the finished suspension to be dispensed is mixed Properties is even.
  • This method and the device specified for its implementation are very complex and, in particular, do not permit continuous delivery of the suspension with constant characteristics at a constant pressure into a delivery line.
  • the moisture content of the pre-comminuted solids supplied is preferably also determined and the amount of carrier to be added is adjusted accordingly.
  • a pre-shredding z. B. with coal in a roller mill to a grain size of max. 6 mm, preferably of max. 4 mm is appropriate.
  • the solid particles are max. 0.2 mm crushed, it being preferred that at least two thirds of the mass of the fine-grained solid parts produced have a grain size of at most 0.1 mm.
  • Such a suspension which can consist of 65-75% of its mass of solid particles, can also be pumped over a greater distance in a pipeline.
  • the total amount of additives in a suspension is usually up to about 0.6% of the mass, depending on the effects expected from the additives.
  • the viscosity of the suspension can be influenced by suitable selection of known additives and, if appropriate, increasing their proportion up to about 1%, without the expected effects of the additives being impaired.
  • the choice of the type, amount and mixture of additives therefore makes it possible to keep the viscosity of the suspension constant if it is affected by any influences such as e.g. B. begins by a change in the grain size of the solid particles or by a change in the liquid content of a predetermined value.
  • the crushing process can also be influenced. This allows the suspension with constant characteristics to be produced by two overlapping control mechanisms.
  • a ball mill is used as a mixing and crushing device. This contains balls, the diameter of which decrease with increasing degree of comminution. By changing the number of revolutions of the ball mill, the grain size of the emerging solid particles can be influenced at constant throughput. The ball mill will be bigger Other solid parts, carrier liquid and additives are fed via an inlet. The treatment of these raw materials in the ball mill leads to an intensive mixing and the formation of the solid-liquid suspension.
  • the toughness of the suspension is determined on the outlet side of the ball mill and the existing grain sizes are determined by taking and examining samples.
  • a correction can be made by changing the proportions of the imported raw materials including the composition of the additives and the speed of the ball mill.
  • the suspension can be checked automatically by means of suitable known devices, and automatic control of the suspension production is possible via a computer program.
  • Pre-broken coal arrives from a feed hopper 1 on a dosing belt scale 2 and falls from it into the inlet 3 of a ball mill 4.
  • the inlet 5 also opens into the inlet 3 for the water serving as carrier liquid.
  • Various additives or additive mixtures can be fed into the inlet 3 via lines 6, 7, 8.
  • the ball mill 4 is gatted, i. H. it consists of several departments with balls of different sizes, which are only indicated in the drawing.
  • the suspension of fine solid particles and water and additives produced in the ball mill flows through the outlet 9 to a pump sump 10 and is pressed from here into a delivery line 12 by means of a pump 11.
  • the viscosity of the suspension can be measured using a suitable measuring device 13, such as. B. the illustrated propeller 14 can be determined.
  • Grain sizes and composition of the solid particles are determined by means of an optical test device 15 in the case of samples taken from the outlet 9 at short intervals by means of a sampling probe 16.
  • the suspension in the partial flow is diluted with water until it is translucent and then flows through the measuring cell of a particle size analyzer.
  • the measuring cell for example, the light of a laser is scattered and reflected on the particles and registered by optical pickups, the measured values of which are compared in a computer 17 with target values. If a change in the particle sizes is necessary, the drive 18 of the ball mill 4 is influenced by the computer 17, so that it changes its speed at a constant throughput. A deviation in the suspension viscosity from a predetermined value is also corrected by the computer 17.
  • the type and amount of the additives is set via controllable valves 18, 19, 20 in the lines 6, 7, 8.
  • a change in the moisture content of the coal supplied is determined on the belt scale 2 by a moisture meter 23, for example by means of infrared rays. If the coal moisture content changes, the belt scale speed is corrected.
  • the supply of water is adjusted by adjusting the control valve 21 in the feed line 5.
  • the amount of water added is determined by a flow meter 22.
  • the suspension to be dispensed should have a constant coal content of 70% with a grain size up to max. 0.2 mm, but mostly less than 0.1 mm. These characteristics must remain constant so that the suspension z. B. can be burned in a burner.
  • the viscosity can therefore be corrected for the additives in accordance with a suitable computer program by controlling one or more of the valves 18, 19, 20 in such a way that the target value of the viscosity is maintained.
  • the system shown with the monitoring and control directions thus create the possibility of producing a highly concentrated suspension with characteristics that are constant at least with regard to the concentration of the core sizes and the toughness, even when the properties of the base materials change.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Crushing And Grinding (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Disintegrating Or Milling (AREA)
  • Colloid Chemistry (AREA)

Claims (7)

1. Procédé de préparation de suspensions à grain fin à haute concentration, possédant des caractéristiques constantes, à partir de matières premières possédant des propriétés variables, les matières premières étant des matières solides, un véhicule liquide et des additifs, et la suspension étant formée dans une opération de mélange et de broyage au moyen d'un broyeur à boulets et une analyse de la grosseur de grain des particules solides et un contrôle de la viscosité de la suspension étant effectués ensuite, et les proportions des matières premières étant modifiées en réponse à des écarts par rapport à des valeurs de consigne prédéterminées, caractérisé en ce que de la matière solide prébroyée est acheminée à un débit massique constant à l'opération de mélange et de broyage qui s'effectue entièrement dans un seul et même broyeur à boulets, la suspension formée, qui possède une proportion de solides constante et une pression constante, étant injectée dans une conduite de refoulement et les écarts de granulométrie étant corrigés par une modification de la vitesse de rotation du broyeur à boulets.
2. Procédé selon la revendication 1, caractérisé en ce que la teneur en humidité des parties solides grossières acheminées est mesurée avant leur chargement dans l'opération de mélange et la proportion du véhicule liquide est réglée en fonction de cette teneur en humidité.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les écarts de viscosité de la suspension sont corrigés par des modifications de la nature, du débit et du mélange des additifs qui sont amenés à l'opération de mélange et de broyage, en conservant un rapport constant entre la matière solide et les liquides.
4. Procédé selon une des revendications 1 à 3, caractérisé en ce que des solides pré-broyés d'une grosseur de grain allant jusqu'à 6 mm sont acheminés à l'opération de mélange et de broyage et, dans la formation de la suspension, sont broyés à une grosseur de grain allant jusqu'à 0,2 mm au maximum, à peu près les deux tiers de la masse des particules solides possédant une grosseur de grain de 0,1 mm au maximum.
5. Procédé selon une des revendications 1 à 4, caractérisé en ce qu'on forme en continu une suspension possédant une proportion de solides constante, qui est comprise entre 65 et 75 %, et dans lequel on utilise du charbon en tant que solides et de l'eau en tant que véhicule liquide.
6. Dispositif pour la mise en oeuvre du procédé de préparation d'une suspension à haute concentration à grain fin possédant des caractéristiques constantes, selon l'une des revendications 1 à 5, composé d'un broyeur à boulets (4), d'un dispositif (2) servant à acheminer des solides pré-broyés, d'une conduite d'arrivée (5) pour le véhicule liquide et d'une conduite pour les additifs, ainsi que de dispositifs (13, 14) destinés à mesurer la viscosité de la suspension et de dispositifs (15, 16) destinés à mesurer la grosseur de grain, caractérisé en ce que la vitesse du broyeur à boulet unique (4) peut être réglée pendant l'opération de mélange et de broyage, pour agir sur la fragmentation des solides, en ce que plusieurs conduites réglables (6, 7, 8) pour l'amenée des additifs sont disposées au-dessus de l'entrée (3) du broyeur à boulets (4) et en ce que la conduite d'arrivée (5) amenant le véhicule liquide, qui est disposée au-dessus de l'entrée (3) est réglable.
7. Dispositif selon la revendication 6, caractérisé en ce que le dispositif servant à acheminer les solides pré-broyés est une bascule doseuse à bande (2), et en ce que, au droit de la bascule à bande (2) est agencé un appareil de mesure de l'humidité (23) destiné à mesurer l'humidité des solides pré-broyés qui sont acheminés.
EP85109553A 1985-07-30 1985-07-30 Procédé et dispositif de préparation de suspensions à caractéristiques constantes provenant d'éléments à propriétés variables Expired EP0210294B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP85109553A EP0210294B1 (fr) 1985-07-30 1985-07-30 Procédé et dispositif de préparation de suspensions à caractéristiques constantes provenant d'éléments à propriétés variables
DE8585109553T DE3563310D1 (en) 1985-07-30 1985-07-30 Method and device for the preparation of suspensions with constant indications from basic materials with variable properties
US06/840,445 US4706892A (en) 1985-07-30 1986-03-17 Method and system for the preparation of a highly concentrated mineral slurry having substantially constant identifying characteristics
CA000504668A CA1294263C (fr) 1985-07-30 1986-03-20 Methode et systeme de preparation de suspension homogene a concentration elevee de fines particules
ZA865440A ZA865440B (en) 1985-07-30 1986-07-22 Method and system for preparation of highly concentrated and fine-grained suspension having constant characteristic features
AU60475/86A AU576092B2 (en) 1985-07-30 1986-07-23 Preparation of coal water slurry
JP61176833A JPS6249942A (ja) 1985-07-30 1986-07-29 一定の特性を有する高濃度微粒子懸濁液の調製方法ならびにシステム

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85109553A EP0210294B1 (fr) 1985-07-30 1985-07-30 Procédé et dispositif de préparation de suspensions à caractéristiques constantes provenant d'éléments à propriétés variables

Publications (2)

Publication Number Publication Date
EP0210294A1 EP0210294A1 (fr) 1987-02-04
EP0210294B1 true EP0210294B1 (fr) 1988-06-15

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EP85109553A Expired EP0210294B1 (fr) 1985-07-30 1985-07-30 Procédé et dispositif de préparation de suspensions à caractéristiques constantes provenant d'éléments à propriétés variables

Country Status (7)

Country Link
US (1) US4706892A (fr)
EP (1) EP0210294B1 (fr)
JP (1) JPS6249942A (fr)
AU (1) AU576092B2 (fr)
CA (1) CA1294263C (fr)
DE (1) DE3563310D1 (fr)
ZA (1) ZA865440B (fr)

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JPS6136398A (ja) * 1984-07-30 1986-02-21 Babcock Hitachi Kk 高濃度石炭・水スラリ製造方法
DE4129408C1 (fr) * 1991-09-04 1992-10-22 Chemische Betriebe Pluto Gmbh, 4690 Herne, De
JPH0569784U (ja) * 1991-12-28 1993-09-21 センチュリーメディカル株式会社 診療装置における表示装置
WO1996026002A1 (fr) * 1995-02-24 1996-08-29 Exxon Chemical Patents Inc. Systeme et procede de melange d'additifs
US20080202415A1 (en) * 2007-02-28 2008-08-28 David Paul Miller Methods and systems for addition of cellulose ether to gypsum slurry
WO2013026176A1 (fr) * 2011-08-19 2013-02-28 General Electric Company Système et procédé de chauffage d'une suspension de combustible
US10569279B2 (en) * 2013-02-28 2020-02-25 Outotec (Finland) Oy Method of controlling a grinding mill process
CN104609209B (zh) * 2015-01-31 2016-09-28 衢州妙凯节能科技有限公司 一种钢球传输机
CN117839853A (zh) * 2024-01-23 2024-04-09 广州烯湾氢能科技有限公司 一种砂磨机浆料研磨控制方法及装置

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DE1526174B2 (fr) * 1965-11-06 1970-08-06
DE2836440A1 (de) * 1978-08-19 1980-03-06 Ruhrchemie Ag Verfahren zur herstellung einer kohle- wasser-suspension, die zum einsatz in eine kohlevergasung unter erhoehtem druck geeignet ist
DE3121979A1 (de) * 1981-06-03 1982-12-23 Ruhrchemie Ag, 4200 Oberhausen Kohle-wasser-suspensionen, verfahren zu ihrer herstellung ind ihre verwendung
WO1984003297A1 (fr) * 1983-02-22 1984-08-30 Univ Alfred Res Nouveau melange de broyage et procede de preparation d'une boue a partir de ce melange
JPH0672994A (ja) * 1991-12-18 1994-03-15 Chugai Pharmaceut Co Ltd ２２−オキサコレカルシフェロール誘導体とその製造方法

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DE1526174B2 (fr) * 1965-11-06 1970-08-06
DE2836440A1 (de) * 1978-08-19 1980-03-06 Ruhrchemie Ag Verfahren zur herstellung einer kohle- wasser-suspension, die zum einsatz in eine kohlevergasung unter erhoehtem druck geeignet ist
DE3121979A1 (de) * 1981-06-03 1982-12-23 Ruhrchemie Ag, 4200 Oberhausen Kohle-wasser-suspensionen, verfahren zu ihrer herstellung ind ihre verwendung
WO1984003297A1 (fr) * 1983-02-22 1984-08-30 Univ Alfred Res Nouveau melange de broyage et procede de preparation d'une boue a partir de ce melange
JPH0672994A (ja) * 1991-12-18 1994-03-15 Chugai Pharmaceut Co Ltd ２２−オキサコレカルシフェロール誘導体とその製造方法

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Also Published As

Publication number Publication date
JPS6249942A (ja) 1987-03-04
DE3563310D1 (en) 1988-07-21
US4706892A (en) 1987-11-17
EP0210294A1 (fr) 1987-02-04
AU6047586A (en) 1987-02-05
CA1294263C (fr) 1992-01-14
ZA865440B (en) 1987-03-25
AU576092B2 (en) 1988-08-11

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