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WO2009003906A1 - Procédé et broyeur à cylindres à lit de matière correspondant pour le broyage en continu d'une matière à broyer friable - Google Patents

Procédé et broyeur à cylindres à lit de matière correspondant pour le broyage en continu d'une matière à broyer friable Download PDF

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Publication number
WO2009003906A1
WO2009003906A1 PCT/EP2008/058165 EP2008058165W WO2009003906A1 WO 2009003906 A1 WO2009003906 A1 WO 2009003906A1 EP 2008058165 W EP2008058165 W EP 2008058165W WO 2009003906 A1 WO2009003906 A1 WO 2009003906A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
marked
roll
roller
millbase
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.)
Ceased
Application number
PCT/EP2008/058165
Other languages
German (de)
English (en)
Inventor
Frank Peter Van Der Meer
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.)
KHD Humboldt Wedag AG
Original Assignee
KHD Humboldt Wedag AG
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 KHD Humboldt Wedag AG filed Critical KHD Humboldt Wedag AG
Publication of WO2009003906A1 publication Critical patent/WO2009003906A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/286—Feeding devices

Definitions

  • the invention relates to a method for the continuous comminution of brittle material to be crushed, in particular ore, in which the ground material to be comminuted is guided through the gap of two counter-rotating rollers, wherein the roller casings have embedded hard bodies for forming an autogenous wear protection.
  • the invention relates to a corresponding for performing the method Gutbettwalzenmühle.
  • brittle material to be ground is fed into the nip, by which the two rotatably mounted, counterrotatable rolls are separated from one another, where they are subjected to pressure comminution in the material bed.
  • the roll mantle like the roll main body, is subjected to a very considerable load due to wear and continuous flexing movements of the entire roll.
  • DE 40 36 040 A1 it is known from DE 40 36 040 A1 to provide the roll shell with embedded hard bodies, wherein the hard bodies protrude from the surface of the roll shell.
  • the surface of the roll mantle is stored in the use of the roll mill, the grinding material to be crushed, wherein a layer is formed which is fixed on the roll shell by the hard body and thus serves as an actual surface of the roll shells.
  • Training and strength of these autogenous wear protection layers are dependent on various material properties, such as the fracture characteristics and the moisture of the ground material to be crushed.
  • the individual particles of the ground material drawn into the nip are then comminuted in a bed of material, ie in a compressed between two armored roll surfaces bulk material when using a high pressure, which is referred to the Gutbettzerkleintation.
  • Another object of the invention is to provide a roller mill for carrying out the method according to the invention.
  • the invention proposes to use a moistened good bed on the roll surface.
  • a moist bed of good quality on the surface of the roll to be comminuted. If the ground material to be comminuted is itself moist, it is not necessary to use a special moistened product bed on the roll surface. However, if the comminuted material to be comminuted has a particular dryness or in its state has only a slight tendency to form a Gutbettts or an autogenous wear protection layer, it has proved to be advantageous if a moist or moistened Gutbett is used on the roll surface.
  • a moist or moistened good bed can be obtained by applying different fractions of material to the rolls.
  • the larger fraction is the ground material to be comminuted and the smaller fraction is, for example, water, a moisture-displaced fraction of the ground material to be comminuted or a fraction of the ground material mixed with other substances or substance mixtures.
  • the invention is applied to the roll with moist or moistened ground material, wherein the wet ground material is applied further away from the nip on the rollers and the ground material to be crushed is added directly into the nip.
  • the moist millbase is added in only a small concentration to the roll mill, so that an autogenous wear protection is formed and this is used for crushing the dry millbase.
  • the fraction which is intended for the formation of the wear protection layer, clay, clay, fine sand or other materials that have a tendency to lump, be attached so that the smaller fraction tends even more to form a permanent wear protection layer.
  • liquid is sprayed onto the roll surface and the entire grinding stock fraction to be comminuted is beaten onto the roll mill in a known manner.
  • the advantage of this is a particularly simple modification of existing roll mills, since they only need to be sprayed with water at a small distance from the nip, so that the liquid present on the roll surface forms a good bed together with the millbase to be comminuted.
  • viscosity-influencing substances or substance mixtures are used in the liquid. This allows the necessary ge total amount of liquid based on the amount of ground material to be crushed even further reduced.
  • the viscosity-influencing substances which advantageously increase the viscosity of the liquid, generally lead to the individual particles of the ground material to be comminuted being formed by stronger adhesion forces forming a more stable layer of good bed while at the same time reducing the necessary amount of liquid.
  • the viscosity-influencing substances may be binders, pulps, cellulose, vegetable flours, organic and / or inorganic salts or clay or clay minerals which are added to the liquid.
  • 0.1% to 2% preferably from 0.2% to 1% and particularly preferably from 0.3% to 0.5% of liquid per ton of millbase is sprayed onto the roll.
  • the quantitative ratio is given in liters per ton of grinding stock to be comminuted.
  • a model for real-time calculation of the order quantity wherein the model has the Mahlguteintrags excel and Mahlgutfeuchte as input parameters and with the help of this model, a liquid application performance is determined and set automatically.
  • the use of a model for the real-time calculation of the application amount has the advantage that the free roll of the roll shell does not have to be determined, but it can be the Mahlguteintrags disease and Mahlgutbefuchte be determined that are analytically easier to determine than the release of the roll shell, by complex computerized control loops must be determined.
  • a roll mill is proposed, the roll shells of which have a hard material applied to form an autogenous wear protection, wherein at least a second material application is provided in addition to a first material application for the material to be ground, which liquid and / or a wetted regrind fraction and / or a millbase fraction Apply with respect to the millbase modified composition on the rollers.
  • a second material application is provided in addition to a first material application for the material to be ground, which liquid and / or a wetted regrind fraction and / or a millbase fraction Apply with respect to the millbase modified composition on the rollers.
  • water is sprayed onto the roller mill so as to keep the autogenous wear protection layer moist.
  • the second application of material may be a simple spray head which sprays liquid onto the rollers, so that an autogenous wear protection fluid from the liquid and the dry grinding stock to be comminuted is produced. layer is formed or it is possible that the second material application hangs a previously moistened fraction to be comminuted millbase on the rollers, wherein the second material loading is further away from the nip than the material loading for the millbase to be comminuted.
  • a spray head for applying liquid to the rolls is arranged at an angle of 35 ° to 55 °, preferably about 45 ° to the vertical of the roll, this angle being measured from the vertical outwards with respect to the position of the nip ,
  • the roll mill has an arrangement for regulating the power of the second material application, this arrangement for controlling the performance of the free release of the roll surface and determine the optimal liquid application amount or It is possible to determine from the grinding stock performance of the roller mill and the measured moisture of the grinding stock to be comminuted an order quantity of liquid or already wetted material to be ground.
  • Table 1 The particle size distribution of the test mate neck
  • FIG. 1 experimental setup
  • Figure 2 a sketch of the present invention Gutbettwalzenmühle mit- spraying
  • FIG. 3 Roll surface after test E1
  • FIG. 4 Roll surface after test E2
  • FIG. 5 roll surface after test E3
  • Table 1 shows the particle size distribution of an iron ore from Mauritania originating from the El Aouj Mine.
  • the “material feed” column represents the cumulative material size distribution of the input material into the commodity bed mill in mass percent
  • the column “roll center” represents the cumulative material size distribution in the roll center
  • the column “roll end” represents the cumulative material size distribution at the lateral ends of the roll.
  • FIG. 1 is therefore shown how water was sprayed onto the experimental roller mill 2.3.
  • a simple nozzle body 4 was used, which has sprayed water at an angle of about 40 to 45 degrees to the axis vertical on the roller 2, 3.
  • the roller itself has a diameter of 0.8 meters and a width of 0.25 meters.
  • the operating capacity of this roller mill is about 75 tons per hour.
  • an arrangement of two spray heads was arranged on both rollers at an angle of about 40 degrees with the vertical axis, said spray heads could give a maximum of about 2.5 liters per minute of water to the roller.
  • water was sprayed on every roller up to a maximum of 5 liters per minute during operation.
  • Figure 2 the experimental arrangement of Figure 1 is shown in a perspective view. It can be clearly seen how a nozzle body 4, spray nozzles arranged next to one another spray liquid onto the roller 2.
  • the result of experiment E3 is a clearly complete adhesion of the wear protection layer on the surface of the rolls.
  • FIG. 5 shows that the rollers are almost completely covered with the autogenous coating, and that the layer thickness has reached a maximum height, so that the embedded hard bodies have the same height as the wear protection layer located therebetween.
  • the embedded between the hard bodies material was difficult to remove under the experimental conditions E3, with a steel brush or a screwdriver had to be used to remove the anti-wear layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Abstract

L'invention concerne un procédé de broyage en continu d'une matière à broyer friable, en particulier un minerai. Selon ce procédé, la matière à broyer est acheminée à travers l'espace formé entre deux cylindres tournant en sens contraire, des éléments durs étant incorporés dans les chemises des cylindres pour former une protection autogène contre l'usure et un lit de matière humidifié étant utilisé sur la surface des cylindres. L'invention concerne en outre un broyeur à cylindres correspondant pour mettre en oeuvre ce procédé.
PCT/EP2008/058165 2007-07-03 2008-06-26 Procédé et broyeur à cylindres à lit de matière correspondant pour le broyage en continu d'une matière à broyer friable Ceased WO2009003906A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007030896.7 2007-07-03
DE102007030896A DE102007030896A1 (de) 2007-07-03 2007-07-03 Verfahren und zugehörige Gutbettwalzenmühle zur kontinuierlichen Zerkleinerung spröden Mahlgutes

Publications (1)

Publication Number Publication Date
WO2009003906A1 true WO2009003906A1 (fr) 2009-01-08

Family

ID=39811791

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/058165 Ceased WO2009003906A1 (fr) 2007-07-03 2008-06-26 Procédé et broyeur à cylindres à lit de matière correspondant pour le broyage en continu d'une matière à broyer friable

Country Status (4)

Country Link
CL (1) CL2008001965A1 (fr)
DE (1) DE102007030896A1 (fr)
PE (1) PE20090744A1 (fr)
WO (1) WO2009003906A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113510145A (zh) * 2021-04-29 2021-10-19 宿迁学院 一种用于土壤修复的微生物混入装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112657669A (zh) * 2020-12-12 2021-04-16 湖南安化渣滓溪矿业有限公司 一种辉锑矿矿石的高效利用与浮选工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3806398A1 (de) * 1988-02-29 1989-09-07 Kloeckner Humboldt Deutz Ag Zweiwalzenmaschine zur druckbehandlung koernigen gutes und verfahren zum betrieb einer solchen maschine
DE4036040A1 (de) * 1990-02-22 1991-08-29 Kloeckner Humboldt Deutz Ag Verschleissfeste oberflaechenpanzerung fuer die walzen von walzenmaschinen, insbesondere von hochdruck-walzenpressen
DE19817274A1 (de) * 1998-04-18 1999-10-28 Cemag Gmbh Verfahren und Vorrichtung zur Feinzerkleinerung von mineralischen und nichtmineralischen Stoffen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3806398A1 (de) * 1988-02-29 1989-09-07 Kloeckner Humboldt Deutz Ag Zweiwalzenmaschine zur druckbehandlung koernigen gutes und verfahren zum betrieb einer solchen maschine
DE4036040A1 (de) * 1990-02-22 1991-08-29 Kloeckner Humboldt Deutz Ag Verschleissfeste oberflaechenpanzerung fuer die walzen von walzenmaschinen, insbesondere von hochdruck-walzenpressen
DE19817274A1 (de) * 1998-04-18 1999-10-28 Cemag Gmbh Verfahren und Vorrichtung zur Feinzerkleinerung von mineralischen und nichtmineralischen Stoffen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113510145A (zh) * 2021-04-29 2021-10-19 宿迁学院 一种用于土壤修复的微生物混入装置

Also Published As

Publication number Publication date
PE20090744A1 (es) 2009-06-27
CL2008001965A1 (es) 2008-08-22
DE102007030896A1 (de) 2009-01-08

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