EP0135568B1 - Installation de broyage fin pour experiences de laboratoire - Google Patents

Installation de broyage fin pour experiences de laboratoire Download PDF

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Publication number
EP0135568B1
EP0135568B1 EP84901059A EP84901059A EP0135568B1 EP 0135568 B1 EP0135568 B1 EP 0135568B1 EP 84901059 A EP84901059 A EP 84901059A EP 84901059 A EP84901059 A EP 84901059A EP 0135568 B1 EP0135568 B1 EP 0135568B1
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EP
European Patent Office
Prior art keywords
grinding
shaft
roller body
housing
cooling wind
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
EP84901059A
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German (de)
English (en)
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EP0135568A1 (fr
Inventor
Dirk Sijsling
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.)
F Kurt Retsch GmbH and Co KG
Original Assignee
F Kurt Retsch GmbH and Co KG
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Filing date
Publication date
Application filed by F Kurt Retsch GmbH and Co KG filed Critical F Kurt Retsch GmbH and Co KG
Priority to AT84901059T priority Critical patent/ATE27923T1/de
Publication of EP0135568A1 publication Critical patent/EP0135568A1/fr
Application granted granted Critical
Publication of EP0135568B1 publication Critical patent/EP0135568B1/fr
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/16—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs with milling members essentially having different peripheral speeds and in the form of a hollow cylinder or cone and an internal roller or cone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2/00—Crushing or disintegrating by gyratory or cone crushers
    • B02C2/10—Crushing or disintegrating by gyratory or cone crushers concentrically moved; Bell crushers

Definitions

  • the invention relates to a device for the fine comminution of, in particular, material samples for laboratory purposes with a fixed and a revolving comminution organ, each with a surface at a distance from one another and the material to be ground temporarily arranged between them, the comminution organs on the one hand having a cylinder jacket which is fixed against rotation and on the other hand a roller body rotating in the same axis is provided, between which the regrind is conveyed in an annular gap from a task on one end face of the roller body, in particular via depressions arranged on the roller body, to a discharge on the other end face of the roller body.
  • a shredding device with the above generic features is known from FR-A 2 183 676.
  • This design which is essentially designed as a mixing and refining device, is also used for comminution of regrind, which is conveyed on the way from the regrind feed to the regrind discharge via an axial annular gap arranged between it, between a fixed casing and a rotating roller body and thereby into the annular space both from the Jacket is crushed inwards as well as blow bars protruding outwards from the roller body.
  • the invention is therefore based on the object of improving a comminution device of the type mentioned at the outset in such a way that it can be used for comparatively soft, hard and also the hardest materials without modifications.
  • the device should be able to work continuously and the size reduction with respect to the grain size in the discharge should be able to be regulated to a very large extent.
  • the task also includes the requirement for a compact design to adapt to the space available in laboratories and for a dustproof design.
  • the laboratory operation is advantageously provided with a mill in which not only coal and coke as examples of comparatively soft materials, but also, for example, limestone, cement and very hard ores can be pulverized, the grain size of the task preferably up to can be up to 8 millimeters, while a grain size of up to about 10 microns can be achieved in the discharge.
  • the difference in grain size does not always have to encompass the aforementioned range, but rather smaller ranges can also be set.
  • the device records a hardness range of 3 - 10 degrees on the Mohs hardness scale.
  • An essential feature of the device according to the invention is that, depending on the degree of hardness of the feed material, an adjustable, grinding grinding action is ensured, which is supported by a striking grinding action to the extent that the roller body rotating in the fixed cylinder jacket tumbles or prances within the jacket during operation Movements are carried out, but not the roller itself is caused to make these movements, but a corresponding effect is brought about by the fact that the cylinder jacket can move by a small amount relative to the roller, preferably under the influence of flexible components, for example mechanical compression springs or hydraulic ones Printing units.
  • the movement processes in the device which are brought about in this way contribute to promoting the flow of material from the task to the discharge and also prevent it from sticking in the shredding area. Both dry and wet regrind can be processed.
  • a support plate 12 is mounted on a table-like base frame 10 so that it can pivot about an axis 11 wearing.
  • the support plate 12 with grinding device 13 and motor 14 can be tilted about the axis 1 by means of handles 15 (cf. FIG. 4), namely the tilting or swiveling angle is 90 degrees, all intermediate positions being infinitely adjustable.
  • a scale 16 is used to precisely determine the angle of inclination a knurled wheel 17 which acts on a suitable clamping device (not shown) which fixes the support plate 12 in the desired position.
  • the grinding device 13 consists of a tubular housing 18 made of cast steel or light metal, which is provided on the outside with numerous longitudinal cooling fins 19.
  • the end faces of the housing 18 are closed by closure pieces 20, 21, which are designed differently and allow the task or the discharge of the goods in a manner to be described.
  • a fixed comminution member in the form of a cylindrical shell 22 which cannot move relative to the housing 18 and is made, for example, of steel or ceramic.
  • the inner surface of the jacket 22 is absolutely cylindrical and smooth, preferably very finely ground or polished.
  • the housing 18 rests on bearing blocks 23, each of which is essentially formed by a helical compression spring 24, as a result of which the housing is both movable within limits and has a relatively upward tendency to exert force.
  • a roller body 26 is arranged on an axially extending shaft 25, the outside diameter of which is so much smaller than the inside diameter of the cylinder jacket 22 that a cylindrical annular gap of approximately 0.2-0.4 between these two parts mm gap width arises.
  • the outer surface of the roller body 26 is also very finely smoothed or polished and, with the exception of two flats or chamfers 27, absolutely cylindrical.
  • the chamfers 27 result from Fig. 2; they are arranged adjacent and abut one another in a roof-shaped manner, resulting in a narrow ridge surface 28 which extends in continuation of the outer surface of the roller body.
  • the chamfers 27 create two adjacent longitudinal spaces 29 in the interior of the device, the cross section of which is essentially in the form of a segment of a circle.
  • the roller body 26 consists in particular of steel and, if possible, has the same hardness as the cylinder jacket 22. The hardness of both comminution members 22, 26 should be greater than the hardness of the material to be comminuted.
  • a cone body 20 as a pre-comminution member on the right end face of the roller body 26.
  • the outer surface of the cone body 30 merges into the outer surface of the roller body 26, but is provided with triangular grooves 31 which run in the axial direction and run from a largest cross section at the narrow end of the cone body 30 to a smallest cross section at the wide end of this body.
  • the inner surface of the cylinder jacket 22 can also be provided with correspondingly parallel grooves 32, as can be seen in FIG. 3.
  • the combined roller-cone body 26, 30 is supported with its shaft 25 in smooth-running roller bearings 33, and the shaft 25 is in a fixed drive connection to the motor shaft of the electric motor 14 via a coupling 34. In this way, the motor conveys a revolving speed of 3000 rpm to the rotating comminution member 26 30.
  • a cooling fan 35 which is also arranged on the support plate 12, can be driven by the same shaft 25 by the motor 14. The cooling fan generates an air flow over the housing 18 and its cooling fins 19.
  • the closure pieces 20, 21 are designed accordingly for the task and the discharge of the regrind, namely the closure piece 20 arranged on the feed side is provided with a funnel 36 which extends into the upper half of the casing 22 in the region of the narrow end of the cone body 30 opens.
  • the closure piece 21 on the discharge side of the housing 18 has a chamfer 37 on the inside, which opens into a lower opening 38 through which the comminuted material lusts the mill.
  • the raw material first reaches the area of the cone body 30 from the mouth of the funnel 36, where a pre-comminution takes place.
  • the grain size obtained must correspond to the annular gap between the jacket 22 and the roller body 26.
  • a progressive comminution then takes place in this annular gap during the further passage in the direction of the closure piece 21, the material itself - although not exclusively - acting as a grinding tool.
  • the longitudinal spaces 29 formed by the chamfers 27 serve essentially for transport in the radial direction and for preventing blockages due to clumping.
  • the longitudinal edges of rooms 29 take part in the shredding to a certain extent like tools.
  • the conveying of the millbase in the axial direction of the machine takes place only to a small extent under the influence of the constantly supplied raw material via the funnel 36, rather the conveyance is primarily caused by the gradient, which can be communicated to the housing 18 by tilting about the axis 11.
  • the steeper the inclined position of the mill the faster the material passes through the various comminution zones, so that the length of time of the material between the comminution elements is a function of the angle of inclination.
  • This means that the degree of comminution is usually dependent on the set gradient, although the hardness of the material also plays a role.
  • Another aspect arises from the moisture content of the raw material; The more wet the raw material is fed in, the more finely the discharge is generally crushed.
  • the scraping effect of the longitudinal edges of the chamfers 27 is significant, particularly in the case of wet goods, i.e. the edges act as wipers.
  • the mounting of the housing 18 on the helical compression springs 24 plays an important role, because the jacket 22 is thereby pressed upwards and with the lower half of its inner surface against the lower half of the outer surface of the roller body 26. Since the housing 18 carries out prancing movements during operation, this occurs between the shredding organs signs of movement that influence the comminution. So that the vibrations of the housing 18 are kept within limits, especially when resonance vibrations cannot be ruled out, holding plates 39 are provided which surround the housing 18 with little play.
  • FIGS. 1-4 a further embodiment is shown, the difference from the embodiment according to FIGS. 1-4 in particular in the design of the chassis or base and in the storage of the crushing elements and the electric motor.
  • This is a table-top device with a column 43 which rises on a footplate (not shown) and which is designed in the middle as a joint or pivot bearing 44.
  • This has a scale 16 and a knurled wheel 17 which acts on a suitable clamping device (not shown) which fixes the comminution device in the desired position, for example in the inclined position shown in FIG. 5 by dash-dotted lines.
  • the bearing in the embodiment according to FIGS. the roller body 26 is connected at only one end to the associated drive shaft, here the shaft 45, so that it protrudes into the cylinder jacket 22.
  • the cylinder jacket 22 is also supported in a self-supporting manner, and the same arrangement principle is also implemented on the opposite side of the shaft 45, where the electric motor 14 with the rotor shaft 46 is located in a correspondingly self-supporting arrangement.
  • the rotor shaft is supported in the conventional manner at its two ends in the motor stand (not shown).
  • the upstanding column 43 is box-shaped hollow above the pivot bearing 44 and serves as a carrier for the shaft 45 and thus also for the self-supporting components arranged on both sides, namely the crushing elements 22, 26 and the motor 14 with rotor shaft 46 Wall of the upper part of the column 43 fastened in corresponding openings bearing flanges 47, 48, in which there are ball or roller bearings 49, 50, between which the shaft 45 extends.
  • This shaft 45 is a hollow shaft in the form of a sleeve open on both sides with different inner diameters (cf. FIG. 6).
  • the inside of the shaft 45 serves on the motor side for the positive reception of the rotor shaft 46 of the electric motor 14, while the shaft 45 is provided on the other side for receiving an axle stub 51 which is integral with the roller body 26. In this way, the shaft 45 forms a coupling connection between the motor 14 and the roller body 26.
  • the shaft 45 On its outer circumference, the shaft 45 carries an impeller 52 of an axial fan, which rotates with the shaft 45.
  • cooling wind is sucked in from below through the upper part of the column 43 according to the arrows 53 and, after being deflected and bundled at right angles, passed through a nozzle-shaped guide plate 54 via the comminution members 22, 26. While the suction openings for the cooling wind in the column 43 are not shown, the outlet openings for the used cooling medium from FIG. 6 result from the reference number 55.
  • a sleeve-like housing 56 connects to the other flange 47, in which the comminution members 22, 26 with the filling funnel 36 and discharge tube 57 are accommodated .
  • a bottle 58 is connected to the discharge pipe 57 as a collector for the comminuted material.
  • the outer casing 59 of the cylindrical comminution member 22 is behind via the resilient bearing blocks 23 supported extensively so that the jacket 22 surrounding the roller body 26 can move in relation to the roller body, should this be necessary, for example, due to material accumulations or foreign bodies.
  • the housing 56 is fastened to the column 43 by means of three clamping screws 60, which can be loosened in a conventional manner for removing the housing 56 and each pivoted outwards.
  • the open edge of the housing is pushed over the correspondingly graduated outer edge 61 of the flange 47, the annular edge of the jacket 22 resting against a flexible seal 62, and the clamping screws 60 are then tightened.
  • the casing 22 can be removed very easily from the roller body 26, for example for cleaning purposes or for exchange for another casing 22 which is more suitable for the next shredding process.
  • the roller body 26 is also combined with a cone body 30 as a pre-comminution member.
  • the outer surface of the cone body 30 merges into the outer surface of the roller body 26, as is also the case in the exemplary embodiment according to FIGS. 1-4.
  • the stub shaft 51 connects here, with which the inner comminution member 26 is fastened to the shaft 45 in a slightly exchangeable manner.
  • a grub screw 63 serves to secure the attachment.
  • the processes take place as has already been described with reference to the exemplary embodiment according to FIGS. 1-4.
  • the prancing movements of the jacket 22 or 59 mentioned there relative to the roller body 26 can be influenced by a regulating screw 64, which acts on the outer bearing block 23.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

Dans des installations de broyage fin en particulier d'échantillons de matériaux pour des expériences de laboratoire, avec un organe de broyage fixe et un autre tournant, qui sont disposées de façon à avoir une surface située vis-à-vis d'une autre avec un intervalle faible et à faire transiter entre elles le produit à moudre, se pose le problème suivant: les échantillons doivent être introduits et évacués un par un, si bien que le travail s'effectue de manière discontinue. Il est également difficile de régler dans les grandes lignes le degré de broyage. Afin de résoudre cette difficulté et de pouvoir effectuer dans ce domaine d'utilisation un broyage continu de matériaux durs et très durs, ainsi qu'un broyage réglable dans les grandes lignes quant à la grosseur des grains, on a donné, conformément à la présente invention, aux organes de broyage, d'une part, une structure de corps de cylindre fixe (22) et, d'autre part, une structure de noyau de cylindre (26) tournant parallèlement à l'arbre; entre eux, un passage annulaire étroit, de préférence de l'ordre de grandeur d'un demi-millimètre, reste libre. Le produit à broyer est introduit sur le côté avant du noyau du cylindre et le produit broyé est évacué sur l'autre côté avant du noyau du cylindre; des dispositifs correspondants (20, 36; 21, 37, 38) sont prévus à cet effet. L'axe médian longitudinal commun des deux organes de broyage peut être basculé par des mécanismes appropriés (11, 12, 15) de manière à prendre une position pratiquement verticale en passant par d'innombrables positions inclinées. Un élément conique (30) dans la surface supérieure du noyau du cylindre (26) peut être disposé sur au moins un côté avant de ce dernier.

Claims (19)

1. Dispositif pour moudre notamment des échantillons de matière à des fins de laboratoire, avec un organe de mouture fixe et un organe de mouture rotatif qui sont disposés en vis-à-vis à distance l'un de l'autre par des surfaces respectives et reçoivent entre eux le flux de matière à moudre, lesdits organes de mouture étant d'une part une enveloppe cylindrique non rotative et d'autre part un corps de cylindre de même axe que l'enveloppe et rotatif dans cette dernière, et la matière à moudre étant, notamment par l'intermédiaire d'évidements prévus sur le corps de cylindre, transportée dans une fente annulaire entre ces organes, depuis une alimentation à l'un des côtés frontaux du corps de cylindre jusqu'à une évacuation à l'autre côté frontal du corps de cylindre, caractérisé en ce que le carter (18, 59) renfermant l'enveloppe cylindrique (22) est, sur des supports (23, 24) élastiques dont le degré d'élasticité est réglable au moyen d'un élément de réglage manuel (64), monté de telle sorte que la moitié inférieure de la surface intérieure de l'enveloppe cylindrique (22) est pressée contre la moitié inférieure de la surface extérieure du corps de cylindre (26).
2. Dispositif selon la revendication 1, caractérisé en ce que les supports élastiques (23) sont principalement formés chacun par un ressort cylindrique de compression (24).
3. Dispositif selon la revendication 1, caractérisé en ce que l'axe longitudinal médian commun des deux organes de mouture (22, 26) est disposé à une position de base horizontale et peut, par des moyens adéquats (11, 12, 15, 44), pivoter jusqu'à une position sensiblement verticale en passant par de nombreuses positions obliques.
4. Dispositif selon la revendication 3, caractérisé en ce que le carter (18) est, avec ses éléments incorporés et le dispositif d'entraînement (14), monté sur un châssis (12) qui, au moyen d'une articulation (11), est fixé mobile en pivotement à environ 90° entre une position horizontale et une position verticale, ainsi qu'à toute position intermédiaire.
5. Dispositif selon la revendication 4, caractérisé en ce que l'articulation (11) est, pour le montage pivotant, équipée d'un cadran (16) et de moyens (17) pour la fixation selon les valeurs indiquées sur le cadran pour la durée de séjour de la matière à moudre dans le dispositif.
6. Dispositif selon la revendication 4, caractérisé en ce que le châssis est configuré sous la forme d'une colonne (43) munie d'un socle, le carter (56, 59) avec ses éléments incorporés (22, 26) d'une part, et le moteur électrique (14) d'autre part, étant montés conjointement mobiles en pivotement et fixables à toute position de pivotement à l'extrémité supérieure de la colonne (43) ou à proximité, respectivement en saillie vers l'un ou vers l'autre côté de la colonne (43).
7. Dispositif selon la revendication 6, caractérisé en ce que le carter pour les organes de mouture (22, 26), l'élément (43) recevant l'arbre (45) et l'enrobage extérieur du moteur électrique (14), sont conjointement configurés sous la forme d'un même corps sensiblement cylindrique.
8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que l'enveloppe cylindrique fixe (22, 59) est configurée sous la forme d'un carter ouvert d'un côté et présentant une paroi frontale dans laquelle le corps de cylindre (26, 30) est monté rotatif et librement sur un arbre (45) qui est accouplé à son extrémité opposée avec l'arbre de rotor (46) d'un moteur électrique (14), le corps de cylindre (26, 30), l'arbre (45) et l'arbre de rotor (46) s'étendant selon le même axe.
9. Dispositif selon la revendication 8, caractérisé en ce que l'arbre (45) maintenant et entraînant le corps de cylindre (26, 30) est un arbre creux, qui reçoit dans sa cavité à une de ses extrémittés, un tourillon (51 ) aisément démontable qui est de préférence solidaire du corps de cylindre (26, 30) et maintient ce dernier librement sur l'arbre (45).
10. Dispositif selon la revendication 9, caractérisé en ce que l'arbre (45) est reçu dans la partie supérieure de la colonne (43) et y est maintenu par des brides de support (47, 48), sur lesquelles d'un côté est fixé extérieurement le moteur électrique (14) et de l'autre côté est monté le carter extérieur (56) recevant le dispositif de mouture (13) par l'intermédiaire des supports élastiques (23, 24).
11. Dispositif selon la revendication 10, caractérisé en ce que le carter extérieur est, au moyen de vis de serrage (60), fixé à la colonne (43) en pouvant être aisément déposé, et conjointement avec lui la partie d'enveloppe (22) du dispositif de mouture (13).
12. Dispositif selon la revendication 1, caractérisé en ce que l'enveloppe cylindrique (18, 22) est, aux fins de refroidissement, pourvue extérieurement de moyens d'augmentation de surface, et notamment de nervures longitudinales (19).
13. Dispositif selon la revendication 12, caractérisé en ce qu'un générateur d'air de refroidissement (35) est disposé à proximité du carter (18, 19, 59) à surface augmentée.
14. Dispositif selon la revendication 13, caractérisé en ce que l'arbre d'entraînement (25, 45) du corps de cylindre (26) est équipé d'ailettes de ventilateur (52) qui présentent une pente ascendante dirigeant l'air de refroidissement sur la surface du carter (18, 59).
15. Dispositif selon les revendications 6 et 13, caractérisé en ce que le générateur d'air de refroidissement (52) est monté sur l'arbre (45) entraînant le corps de cylindre (26, 30), et en ce que l'intérieur de la colonne (43) est conçu comme prise d'aspiration pour l'air de refroidissement.
16. Dispositif selon la revendication 15, caractérisé en ce qu'un entonnoir (54) allant en se rétrécissant dans le sens de refoulement du générateur d'air de refroidissement (52) est disposé au voisinage dudit générateur (52) dans leditsens de refoulement, et sert de buse concentrant l'air de refroidissement qui balaye l'enveloppe (22, 59) du dispositif de mouture (13).
17. Dispositif selon les revendications 7 et 13, caractérisé en ce que l'ensemble de montage en série coaxiale du dispositif de moture (13), de l'arbre (45) et du moteur électrique (14) est conçu comme tunnel de soufflerie d'air de refroidissement, en ce que des orifices d'aspiration d'air de refroidissement sont prévus à côté du moteur électrique (14) et en ce que des orifices (55) d'échappement d'air de refroidissement sont prévus à côté du conduit d'évacuation (57) de la matière moulue, tandis que le générateur d'air de refroidissement (52) se trouve dans la partie médiane de l'ensemble, sur l'arbre (45).
18. Dispositif selon la revendication 1, caractérisé en ce que le corps de cylindre (26) présente d'une manière en soi connue deux méplats ou chanfreins (27) se rejoignant en forme de toît et s'étendant sur toute la longueur du cylindre, et en ce que le faîte (28) formé par les méplats (27) du corps de cylindre (26) est constitué par une bande étroite de la surface extérieure du corps de cylindre.
19. Dispositif selon au moins une des revendications précédentes, caractérisé en ce qu'un récipient (58) recevant la matière moulue est raccordé à l'orifice d'évacuation (38) ou selon le cas au conduit d'évacuation (57), de sorte que ce récipient suit les mouvements de pivotement du dispositif de mouture (13, 22, 26, 30).
EP84901059A 1983-03-02 1984-03-02 Installation de broyage fin pour experiences de laboratoire Expired EP0135568B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84901059T ATE27923T1 (de) 1983-03-02 1984-03-02 Feinzerkleinerungsvorrichtung fuer laboratoriumszwecke.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3307323 1983-03-02
DE19833307323 DE3307323A1 (de) 1983-03-02 1983-03-02 Feinzerkleinerungsvorrichtung fuer laboratoriumszwecke

Publications (2)

Publication Number Publication Date
EP0135568A1 EP0135568A1 (fr) 1985-04-03
EP0135568B1 true EP0135568B1 (fr) 1987-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84901059A Expired EP0135568B1 (fr) 1983-03-02 1984-03-02 Installation de broyage fin pour experiences de laboratoire

Country Status (7)

Country Link
US (1) US4688727A (fr)
EP (1) EP0135568B1 (fr)
JP (1) JPS60501146A (fr)
AU (1) AU567446B2 (fr)
DE (3) DE3307323A1 (fr)
SU (1) SU1433395A3 (fr)
WO (1) WO1984003453A1 (fr)

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US20040053319A1 (en) * 2002-09-17 2004-03-18 Mcwilliams Diana R. Isolation of genetic molecules from a complex biological constrauct for use in genetic expression analysis
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CN102049335B (zh) * 2009-11-06 2012-07-04 五冶集团上海有限公司 大型球磨机安装施工方法
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AU2578484A (en) 1984-09-28
JPS60501146A (ja) 1985-07-25
DE3307323A1 (de) 1984-09-06
AU567446B2 (en) 1987-11-19
DE3464335D1 (en) 1987-07-30
DE3490095D2 (en) 1985-03-21
SU1433395A3 (ru) 1988-10-23
US4688727A (en) 1987-08-25
WO1984003453A1 (fr) 1984-09-13
EP0135568A1 (fr) 1985-04-03

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