DD298600A5 - Tube ball mills for effective desagglomeration and crushing of high pressure crushed sproeden material - Google Patents

Tube ball mills for effective desagglomeration and crushing of high pressure crushed sproeden material Download PDF

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Publication number
DD298600A5
DD298600A5 DD33269589A DD33269589A DD298600A5 DD 298600 A5 DD298600 A5 DD 298600A5 DD 33269589 A DD33269589 A DD 33269589A DD 33269589 A DD33269589 A DD 33269589A DD 298600 A5 DD298600 A5 DD 298600A5
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DD
German Democratic Republic
Prior art keywords
ball
lining
grinding
mill
mills
Prior art date
Application number
DD33269589A
Other languages
German (de)
Inventor
Siegfried Haubold
Gunter Schnedelbach
Roland Bissot
Paul Clemens
Helfried Dombrowe
Gerhard Ebert
Guenter Fanck
Rainer Goersch
Detlef Hoehne
Burkhard Kraft
Curt Krumbiegel
Evamaria Poepper
Liesbeth Richter
Wolfgang Scheibe
Wolfgang Seemann
Joachim Winkler
Original Assignee
Forschungsinstitut Fuer Aufbereitung,De
Zementwerke Ruedersdorf,De
Institut Fuer Zement,De
Zementkombinat Dessau,De
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 Forschungsinstitut Fuer Aufbereitung,De, Zementwerke Ruedersdorf,De, Institut Fuer Zement,De, Zementkombinat Dessau,De filed Critical Forschungsinstitut Fuer Aufbereitung,De
Priority to DD33269589A priority Critical patent/DD298600A5/en
Publication of DD298600A5 publication Critical patent/DD298600A5/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18Details
    • B02C17/20Disintegrating members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/04Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
    • B02C17/06Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container with several compartments
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18Details
    • B02C17/22Lining for containers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material
    • B02C21/002Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill
    • B02C21/005Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill the roller mill having cooperating rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone

Abstract

The invention relates to Rohrkugelmuehlen for effective deagglomeration and crushing of high pressure comminuted sproeden material after Guttbett roller presses, two-roll machines or Walzenmuehlen. She is u. a. characterized in that, in the delimited process spaces filled with certain ballfoldings and equipped with a special inner lining (2), the u. a. has a rising profile base in the radial plane of the mill, the deagglomeration of Schuelpen contained in Walzenmuehlaustragsgut and the crushing of coarse Mahlgutpartikel (1.0 mm) and the further fine grinding of Mahlgutpartikel 1.0 mm in circulating grinding plants in at least one separate process room for fine grinding (8 ) is made in the u. a. a further special inner lining (9) of nodular cast iron (without rising profile ground) is used and the grinding to final fineness in Durchlaufmuehlen open circuit takes place, this Prozeszraum in the front part with the inner lining (9) and in the back with classifying Mahlplatten {milled ball mills; deagglomeration; crushing; Material, high pressure crushed; Kugelfuellung; Inner lining; Profile base; Grinding plates, classifying; pulverization}

Description

-2- 298 600 characteristic of the known prior art
Significant efforts have been made in recent years to improve energy utilization in the crushers.
Thus, methods and devices for crushing and milling brittle material with different denominations such as "crushing in the nip using high pressure", "Goodbettzerkleinerung in the nip of a high-pressure roller press, roll mill, roller press or high-bed roller mill" known (DE-PS 2708053, EP-PS 00843037), in which the non-pre-shredded regrind, for example cement clinker, is first pressed in a first stage in the gap of a high-pressure roll mill under high pressure. This leads partly to particle destruction, partly to the generation of cracks in the particle interior and to the formation of agglomerated These can then be deagglomerated or destroyed in various comminution units with comparatively low energy consumption and ground to finished product fineness. The operated with a high compressive force of more than 20 kN / cm roll width roller mill produced during the material pressing agglomerates (slugs) whose grindability is improved compared with unpressed material, so that the known two-stage crushing total to a significant reduction of the specific energy requirement up to 30% leads, whereby about 7 h thereof on the second crushing stage, by adjusting the downstream equipment to the changed flow conditions accounted for. Thus, the patent specification various methods and equipment with respect to coupling roller mill sifter (DD-WP 220510, DE-PS 3719251), roller mill-Siebeinrichtung- Rohrkugelmühle sifter (DE-PS 2708053, EP-PS 0084383) with various devices for Desagglomeratlon in Hammer mills, impact mills, disintegrators, Simson mixer (DE-OS 3712147), in the classifier (DE-OS 3609229) and for deagglomeration in tubular ball mills with separate deagglomeration without grinding media and subsequent fine grinding chamber different material feeds (DE-OS 3323517, DE-OS 3506486, DE-OS OS 3518543, DE-OS 3711926).
A disadvantage has been found in the direct coupling roller mill sifter that the finished product produced has very steep grain distributions and problems in the cement industry in the processability, the water requirement and the strength development of the finished cements produced occur. The use of additional deagglomeration devices causes comparatively higher machine and equipment expenses.
The deagglomeration of the slugs in the classifier leads to dosing, clogging and wear problems and no complete dissolution of the slugs. The use of a grinding chamber of a two-chamber tubular ball mill only for deagglomeration of slugs (DE-OS 3323517, DE-OS 3711926, DE-OS 3518543) or an extra dedicated separate device (DE-OS 3506486) is ineffective and has an unfavorable space-time yield.
Object of the invention
The aim of the invention are tube ball mills for the effective deagglomeration and crushing of high pressure crushed, brittle material that allow over the prior art throughput increases and savings in specific electrical energy demand.
Explanation of the essence of the invention
The invention is based on the object Rohrmugelmühlen in various circuits and designs after Gutbett roller presses, two-roll machines or roll mills as aggregates with different names for high pressure crushing, hereafter referred to as roll mills, so coupled to this new process stage that see further throughput increases and savings in specifi Electric energy demand of grinding plants can be achieved. The process stage of high-pressure comminution in roll mills is characterized by the fact that the single-grain and good-bed crimps of coarse-disperse, brödon feedstock with upper grain sizes of up to 100 mm between two rolls with very high specific contact forces of 60 kN / cm to 100 kN / cm roll width are very high effectively, mainly by a compressive stress occurs. Due to the high specific contact forces and the hydraulic Abstützunq the Los- against the fixed roller extends the working gap of roll mills in continuous operation usually on gap widths of 15mm to 20 mm and sometimes even more, so that in Walzenmühlenaustragsgut next to the desired compacts, the nohe fine material <90 pm up to 30% and strongly agglomerated r.ind, undisturbed primary grain fractions up to the working gap of the roll mill are included. The grain structure of the Walzenmühlenaustragsgutes is determined after the careful deagglomeration of the compacts contained and is primarily characterized by the grain size d M , which at 70% Siebdurchganaergergergerg. In general, the grain size doojin the Waizenmühlenaustragsgütern between 1mm and 5mm.
In this Vcrlaufbedingungon the downstream tubular ball mills are set in various circuits and designs. It is then important to disagglomerate the slugs contained in the Walzenmühlenaustragsgut quickly and effectively in order to claim deii grain bond can on the other hand, the given, undisturbed primary grain fractions must be comminuted up to particle sizes of 20 mn. This object is achieved in that in the delimited process chambers (1 \ of tubular ball mills in various circuits and designs, which is filled with ball fillings whose maximum maximum ball diameter 70mm and whose mean ball diameter d k is 10 to 40 times the grain size dgo of the feedstock and an inner lining (2) with radially encircling profiles whose cross-section triangular shape with radii on the profile base and mountain, are equipped, the effective deagglomeration of the Schülpen contained in the Walzenmühlenaustragsgut and the crushing of coarse Mahlgutpartikel> 1.0 mm, wherein the axial Distance of the radially encircling profiles (3) of the inner lining (2) 1.2 times the maximum spherical diameter and the height of the isosceles triangles (4), the opening angle of the profile base of 90 ° measures, at the leading end of the inner lining is 60% of the largest ball diameter and the Central Punk t of the radius (5) from the center of the
ai ideren radii of the inner lining is offset so that the profiled ground increases in the radial mill plane with the direction of rotation to the immersion depth (6) of the wound micro ball in the radially encircling profile at the end of the inner lining, the further effective fine grinding of the grinding material particles <1, 0mm in circulating grinding plants, where the tube ball mill is connected in the circuit with at least one Streuwindsichter, in at least one separate process chamber (8) is made in which an inner lining (9) made of cast iron with nodular graphite with radially encircling profiles whose basic design of the inner lining (2 ), deviating from the profile ground in the radial mill plane does not increase and the radius (10) at the bottom of the profile in the axial mill plane throughout 95% of the radius)
'The smallest sphere used is, in coupling with polydisperse
Spherical fillings with grinding ball diameters from 50 mm to a minimum of 16 mm is used and the effective grinding of the grinding material particles <1.0 mm to the required final fineness in continuous flow mills in the open circuit in a process chamber for superfine grinding (11), in the front part with the inner lining (9). and in the back with classifying refining plates on a Mahlbahnteil of at least a length-diameter ratio of 1.6 stocked and filled with a polydisperse Mahlkugelfüllung with Mahlkugeldurchmessern of 60 mm to 12 mm, wherein at the transition of the different inner linings in the process chamber (11 ) a storage ring (12) is arranged.
It is essential to the invention that in the delimited process spaces (1) of the tubular ball mills in various circuits and designs a ball filling with a mean ball diameter 3 k , which is 20 times the grain size dgo of the feed material and according to the relationship
Pi = mass fraction of the ball classes to 1.0 normalized di = diameter of the individual ball classes is calculated, is used.
In the process spaces (1) with the inner lining (2) with radially encircling profiles, the cross-section triangular shape with radii on the Profile base and -borg, wherein the axial center distance of the radially encircling profiles (3) has the 1,2ff marriage of the largest spherical diameter, ensures a special packing structure of the ball filling in the process spaces (1). This allows a maximum slip of rolling on the inner lining Mahlkugelschleppe against the mill wall, a maximum mobility of Mahlkörperschleppe in itself, a suppression of cataract action of the grinding balls, a minimum energy requirement and the stress of Walzenmühlenaustragsgutes by pressure and shear. As a result, an effective and very rapid deagglomeration of Materiaischülpen contained in Walzenmühlenaustragsgut is achieved, for which a specific labor requirement of only 0.1 to 0.3kWh / t is required. Due to the large grinding gap (13) under the resting on the radially encircling profiles at the tapered end of the inner lining grinding balls, which is achieved in that the height of the isosceles triangles (4), the opening angle of the profile base of 90 ° measures, 60% of the largest spherical diameter A very good collection of the primary grain sizes contained in the Walzenmühlenaustragsgut is possible up to 20 mm below the moving Mahlkörperschleppe. The effective comminution of the primary grain fraction up to 20 mm to particle sizes <1.0 mm causes the rising profile base of the inner lining (2) in the radial mill level to immersion depth (6) of the micro ball used at the end of the inner lining, resulting in the Mahlspalt (13) under the overlying grinding balls to zero or narrowed to a small residual gap at the outlet end of the inner lining. The inventive solution in the delimited process chambers (1) of tubular mills in various circuits and designs to roll mills plant throughput in existing grinding plants with upstream roll mills compared to known designs of downstream tubular mills can be increased up to 15% and the specific work needs can be reduced up to 20% ,
The further effective fine grinding of the Mahlgutpartikel <1.0 mm takes place in circulation grinding plants, where the tube ball mill with at least one Streuwindsichter works in the circuit in at least one separate process chamber (8), in which an inner lining (9) made of cast iron with nodular graphite without rising profile ground of the radial circumferential profiles in the radial mill plane in conjunction with polydisperse ball fillings with ball diameters of 50mm to 16mm in use.
The combination of the material of the inner lining (9) with its geometry and the coupling with the polydisperse Mahlkugelfüllungen ensures a very effective fine grinding, the Mahlgutagglomeration is greatly inhibited. The latter fact gets in the fine grinding of Walzenmühlenaustragsgut, which was already partially agglomerated in the high-pressure crushing, particular weight.
The further Feinmahhng the Mahlg itpartikel <1.0 mm to the required final fineness in continuous flow mills in the open circuit according to the invention in process areas for Feinstmahlung (11), in the front part, before the jam ring (12), with the inner lining (9) and in the rear Part between Stauring (12) and mill discharge end with classifying refining plates, which cause an axial classification of the different Mahlkugelaurchmesser, are equipped on a Mindestmahlbahnlänge with a length-diameter ratio of 1.6. It is essential to the invention that the preferably used conical Klassiermahlplatten with lever strips that can be arranged axially parallel or approximately axially parallel, are equipped. The levers on the conical Klassiermahlplatten aim in the back of the process chamber (11) a cataract effect of the grinding balls, which is required for grain width broadening of the finished good, especially in the cement grinding. The combination according to the invention of the non-classifying inner lining (9) with classifying grinding plate types and a holding ring arranged therebetween is required in order to influence the grinding material agglomerate by a targeted influencing of the axial grinding material transport speed in the process space (11). during the fine grinding of Walzenmühlenaustragsgut to the required final fineness in the passage to behp.rschen. Compared with the prior art, the invention has the following advantages:
- Simultaneous effective coarse crushing of the primary grains of a maximum grain size of 20 mm and effective deagglomeration of the material slugs, for which only a specific working requirement of 0.1 to 0.3 kWh / h is required
- effective, agglomeration-inhibiting fine grinding on required Zielfeinheiten
- Increase plant throughputs up to 15% and reduce specific labor requirements by up to 20%
embodiment
example 1
In front of a two-chamber tubular ball mill with final discharge, which operates in the circuit with at least one Streuwindsichter, is connected in a cement circulation mill as shown in FIG. 1, a roller mill. The sifter produced in the diffuser classifier finely leaves the circulating grinding plant as finished cement. A part or the total amount of the Sichtergrobgutes arrives together with the Walzenmühlenaustrag to process space 1 of the tubular ball mill. The process space 1 of the Rohrkugelmünle is from the process chamber 8 by a? conventional partition delimited with Hubkarnmer. For effective deagglomeration of the Walzenmühlenaustrages, which has a grain size d M = 3.0mm, and for crushing the coarse particles> 1.0mm according to the invention in the process chamber 1 is a ball filling with a mean ball diameter d k = 20 · 3.0 = 60mm in conjunction with the inner lining 2 according to the Figuiun 2 to 4 used. In the present case, a polydisperse Kugeeiüllung with ball diameters of 70mm, 60mm and 50mm is selected with mass-like proportions, so that there is a mean ball diameter of dk = 60mm. The inner lining 2 has radially encircling profiles in the axial plane of the mill according to FIGS. 3 and 4 whose cross-sections have a triangular shape with radii at the base and top of the profile, the profile ground being offset in the radial mill plane according to FIG. 2 by displacing the center of the radius 5 the center of the two other radii of the inner lining at the outgoing end of the inner lining (Figure 4) to the immersion depth β of the microspheres with 50mm diameter increases in the radially encircling profile. The microspheres run on the running end of the inner lining according to Figure 4 on the profile base, while remaining for the balls with 60mm and 70mm diameter at the end of low residual gaps. At the tapered end of the inner lining according to FIG. 3, the height 4 of the isosceles triangles, whose opening angle from the profile base is 90 °, is 60% of the largest sphere diameter. As a result of the rising of the profile ground in the radial mill plane, the radius 7 increases on the profile base in the axial mill plane with the direction of rotation of the inner lining. The length-diameter ratio of the process chamber 1 can be between 0.2 and 1.0, depending on the proportion and the strength of the compacts (slugs) and the coarse grain fraction> 1.0 mm in Walzenmühlenaustrag.
Preferably, a Mahlkörperfüllungsgrad of 30% of the grinding chamber volume of the process chamber 1 is used. The further effective fine grinding of the feed takes place after complete deagglomeration and Vormahlung in the process chamber 1 in the demarcated by the intermediate wall process space 8, with a polydisperse ball filling of ball diameters of 50mm, 40mm, 35mm, 30mm, 25mm and 20mm with a mean ball diameter of d k = 30mm to 35mm filled and equipped with an inner lining 9 according to Figures 5 and 6. The inner lining 9 has the same basic profiling of the inner lining 2, ie the center distance 3 of the radially encircling profiles, which likewise has a triangular shape with radii on the profile crest and ground according to FIG. 6, is equal, likewise the height 4 of the isosceles triangles, that of the profiled ground have an opening angle of 90 °. Notwithstanding the inner lining 2, the profiled base according to FIG. 5 does not rise in the radial mill plane, whereby the radius 10 on the profiled ground in the axial mill plane, which is 95% of the radius of the inserted small sphere, remains the same with the direction of rotation of the inner lining.
Example 2
According to FIG. 7, in a cement circulation grinding plant, a roller mill is connected in front of a tube ball mill, which is designed as a three-chamber center discharge mill. The tubular ball mill works in the circuit with at least one Streuwindsichter, the deposited fine material leaves the grinding plant as finished cement. The Walzenmühlenaustragsgut WA possibly passes together with a subset of Sichtergrobgutes G in the process chamber 1 of the tubular ball mill, for which the statements made in Example 1 applies. The further effective fine grinding takes place in this Rohrkugelmühlentyp in the process chambers 8 and 8a. While the process chamber 8 with regrind, which has passed from the process chamber 1, the intermediate wall is acted upon, runs the process chamber 8a in the opposite direction to the process chamber 8, a subset of Sichtergrobgutes G before. Both process spaces 8 and 8a are equipped with the inner lining 9 according to FIGS. 5 and 6. In the process chamber 8 is a polydisperse grinding ball filling with ball diameters between 50mm and 20mm with a mean ball diameter d k = 30 mm to 35 mm is used. The polydisperse ball filling the process space 8 a is composed of ball diameters between 40mm and 16mm and has a mean ball diameter d k = 25 mm to 30mm. The Mahlkörperfüllungsgrad is in both process spaces between 22% and 25%. To realize the system circuit shown in FIG. 7, three bucket elevators are generally required to increase the height of the mass flows of WA, A and G.
Example 3
Is not possible for reasons of space in a cement circulation mill of Example 2 in the upstream of a Walzonmühle in front of the tube mill, the arrangement of a third bucket elevator for the mass flow of Walzenmühlenaustrages WA and is used for Höhenförderung the Walzenmühlenaustraggutes the bucket elevator for the Sichtergrobgut G, then with respect Rohrkugelmühlenkon * 9ption according to Figure U to move. Here, both sides of the mill are uniformly charged with a mixture of Walzenmühlenaustrags- and Sichtergrobgut. In this case, by incorporating an intermediate wall or a high stagnation ring in the process chamber 8a of Example 2, the three-chamber tubular ball mill in a four-chamber mill so that each mill side, a process chamber 1 and a process chamber 8 is formed, which after the example 2 described aspects are to be read. Is the installation of an additional partition or a
-5- 248 600
Stauringes in the process space 8 a of Example 2 is not possible, then Dieber with the inner linings 2 and 9 as in the proposed process space allocation to equip, and operate with a polydisperse ball filling with ball diameters of 70mm to 20mm with all intermediate sizes.
If the bucket elevator for the tubular ball mill material A is used to raise the height of the roller mill discharge material, example 2 is applicable.
Example 4
According to FIG. 9, a roller mill is connected in front of a cement flow mill in a cement flow grinding plant. The Walzenmühlenaustragsgut is in the process chamber 1, which is delimited by a conventional partition from the process space 11, deagglomerated and pre-ground. In the process space 11, the inner lining 9 according to FIGS. 5 and 6 is in use until the storage ring 12. From the storage ring 12 to the discharge end of the tubular ball mill, on a Mahlbahnabschnitt with a length-diameter ratio of at least 1.6 classifying grinding plates, preferably conical Klassiermahlplatten, with lever bars, which cause an axial classification of the different ball diameter of the polydisperse ball filling used. In the process chamber 11 a polydisperse ball filling with ball diameters of 40mm, 35mm, 30mm, 25mm, 23mm, 20mm, 18mm, 16mm, 14mm and 12mm and a mean ball diameter d k = 25mm is used. The Mahlkörperfüllungsgrad is 22% to 25%.

Claims (4)

1. Tubular ball mills for the effective deagglomeration and crushing of hochdruckzerkleinertem brittle material after Gutbett roller presses, two-roll machines or roll mills, characterized in that in the demarcated process chambers (1) of tubular ball mills in various circuits and designs with ball fillings whose maximum diameter 70mm maximum and whose mean ball diameter d * is 10 to 40 times the grain size deo of the feed material, filled and an inner lining (2) with radially encircling profiles, the cross-section triangular shape with radii on the profile base and mountain, are equipped, the effective deagglomeration in the Walzenmühlenaustragsgut The axial distance '.er radially encircling profiles (3) of the inner lining (2) 1.2 times the maximum spherical diameter and the height of the isosceles triangles (4), dere n opening angle from the profile base of 90 ° measures, at the leading end of the inner lining is 60% of the maximum spherical diameter and the center of the radius (5) is offset from the center of the other radii of the inner lining 3o that the profiled ground in the radial mill plane with the sense of rotation to to the immersion depth (6) of the microspheres used in the radially encircling profile at the outgoing end of the inner lining increases, the further effective fine grinding of Mahlgutpartikel <1.0mm in circulating grinding plants, where the tubular mill is connected in the circuit with at least one Streuwindsichter, in at least one separate Process space for fine grinding (8) is made in which an inner lining (9) made of nodular cast iron with radially encircling profiles whose basic design of the inner lining (2), notwithstanding the profile ground in the radial mill plane does not increase and the radius (10 ) on the profile ground in the axial mill 95% of the radius of the microspheres used throughout, is used in conjunction with polydisperse ball fillings with grinding ball diameters from 50 mm to a minimum of 16 mm, and the effective grinding of the regrind particles <1.0 mm to the required final fineness in continuous flow mills in a process space Fine grinding (11), equipped in the front part with the inner lining (9) and in the rear part with classifying grinding plates on a Mahlbahnteil of at least a length-diameter ratio of 1.6 and with a polydisperse Mahlkugelfüllung with grinding ball diameters of up to 60 mm 12 mm is filled. wherein at the transition of the different inner linings in the process space (11) a storage ring (12) is arranged.
2. tube ball mill according to claim 1, characterized in that in the demarcated process spaces (1) of the tube ball mills in different_Schaltungen and embodiments a ball filling with a mean grinding ball diameter d k , which is 20 times the grain size deo of the feed material and according to the relationship
With
Pi = mass fraction of the ball classes normalized to 1.0
dj = diameter of the individual ball classes
calculated, is used.
3. tube ball mill according to claim 1, characterized in that in the process space for Feinstmahlung to final fineness (11) in the open cycle in the rear Mahlbahnteil, between the storage ring (12) and the Mühlenaustragsende, preferably conical Klassiermahlplatten come with lifting strips.
For this
4 pages drawings
Field of application of the invention
The invention relates to tubular ball mills for the effective deagglomeration and comminution of high pressure comminuted brittle material, which has arisen after the stress in Gutbett roller presses, two-roll machines or roll mills.
DD33269589A 1989-09-15 1989-09-15 Tube ball mills for effective desagglomeration and crushing of high pressure crushed sproeden material DD298600A5 (en)

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DD33269589A DD298600A5 (en) 1989-09-15 1989-09-15 Tube ball mills for effective desagglomeration and crushing of high pressure crushed sproeden material

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DD33269589A DD298600A5 (en) 1989-09-15 1989-09-15 Tube ball mills for effective desagglomeration and crushing of high pressure crushed sproeden material
DE19904023624 DE4023624C2 (en) 1989-09-15 1990-07-25 Tube ball mills for effective deagglomeration and crushing of high-pressure crushed brittle material

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DE3506486A1 (en) * 1985-02-23 1986-08-28 Kloeckner Humboldt Deutz Ag DEVICE FOR CRUSHING AND GRINDING SPROEDEN GROUND MATERIALS, FOR EXAMPLE Cement clinker, ore, coal or the like
DE3518543C3 (en) * 1985-05-23 1996-12-19 Kloeckner Humboldt Deutz Ag Method and device for comminuting or grinding brittle ground material
DE3609229A1 (en) * 1986-03-19 1987-09-24 Krupp Polysius Ag METHOD AND SYSTEM FOR CRUSHING SPROEDEM GROUND MATERIAL
AT391425B (en) * 1986-09-18 1990-10-10 Voest Alpine Ag Internal lining for cylindrical ball mills
DE3711926A1 (en) * 1987-04-08 1988-10-27 Kloeckner Humboldt Deutz Ag Device for comminuting and grinding brittle material to be ground, such as cement clinker, ore, coal or the like
DE3712147A1 (en) * 1987-04-10 1988-10-20 Krupp Polysius Ag METHOD AND SYSTEM FOR CRUSHING SPROEDEM GROUND MATERIAL
DE3719251A1 (en) * 1987-06-10 1988-12-22 Kloeckner Humboldt Deutz Ag METHOD AND SYSTEM FOR CONTINUOUS PRESSURE REDUCTION OF SPROEDEN GROSSGUTES
AT393234B (en) * 1987-08-20 1991-09-10 Boehler Gmbh Grinding method for ball tube mills, ball tube mills and grinding plate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4426211A1 (en) * 1994-07-23 1996-01-25 Maalwerk Amsterdam Bv Lining for the drums of ball mills

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DE4023624A1 (en) 1991-03-28
DE4023624C2 (en) 1996-03-14

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