RU2190474C2 - Ball mill - Google Patents

Abstract

FIELD: processes and equipment for disintegrating materials of natural shelf. SUBSTANCE: ball mill includes drum mounted with possibility of rotation and having mutually opposite branch pipes. One branch pipe is designed for charging material and engaging with conduit for disintegrated material. Another branch pipe is shifted relative to main vertical axis of ball mill. At each end of mill helical guiding receiving ribs are arranged in such a way that they are oriented in different sides one relative to another. One end of mill is engaged by means of gearing with drive unit. Receiving and discharging branch pipes are provided with plates having lock joints. Zones of bearing surfaces of journals are provided with threaded members for temperature meters. Cooling water is supplied to body of each bearing assembly and it is drained out of it. Hatches are mounted along drum. Wavy plates with X-shaped end faces are arranged on inner surface of drum. EFFECT: enhanced efficiency of disintegration. 12 dwg

Description

 The invention relates to devices used for processing natural shelf materials.

 A prototype analog is known, see fig. 17, p. 24 // I. Matveenko and V. L. Tarsky, Prince. "Foundry equipment". Textbook for technical schools. - M.: Mechanical Engineering, 1976, 440 p., With silt. [1].

 The disadvantages [1] include the small technological capabilities associated with the speed factors of the crushed materials in ball mills with a productivity of 4 to 50 t / h.

 The problem is achieved in that in a ball mill containing a rotatable drum with balls, a receiving and unloading nozzle and a drive, an unloading nozzle is displaced relative to the main vertical axis of the mill, and spiral guiding rails multidirectional relative to each other are located in the bushings from each mill end ribs, one of the ends of the mill is equipped with gearing with a drive, sliding bearings are prefabricated, the receiving and unloading nozzles are equipped with a plate with end connections with locking joints, while the end walls of the bearings have gaps for laying asbestos cord in them, the separated bearing housings are provided with protrusions and brackets closed on their surface, which provide mounting of the bearing supports, the areas of the bearing surfaces of the pivot pins are equipped with mounting threaded elements and holes for installing thermometers, each bearing housing is supplied with coolant inlet and outlet, along the drum length there are three equally offset relative to a friend of the hatch for loading and unloading and performing technical inspection, while the service platforms are shifted to one side and symmetrically with respect to the vertical main axis of the drum, the gear wheel is covered with a casing relative to the hatch, in which forced throttles are located directly opposite the teeth, the inner surface of the drum is provided wave-shaped plates with X-shaped ends, bearing bearings are equipped with a forced oil supply, from the outside the drum is closed for at least seven in sections consisting of prefabricated half rings, moreover, the bearing units for installing the mill are opposed, and the axis of the water-cooled rotary drive unit is offset relative to the central axis of one of the bearings.

 Graphic materials: figure 1 - main view; figure 2. - plan view; figure 3 is an end view; FIG. 4 is a fragment of a mobile compound; 5 is a fragment of a side projection of the pipe; 6 is a view of the flange of the pipe; 7 is a fragment of the laying of an asbestos cord relative to the inner cavity of the mating surfaces of the movable joint; Fig. 8 (a and b) are mnemonic layouts of nodes. Fig. 9 (a, b, c) is a fragment of a section of a movable unit with an opening for installing a thermometer.

 The list of digital designations: drive 1, rotary drum 2, receiving 3 and unloading 4 nozzles; overpass 5; vertical main axis 6; spiral guide ribs 7; rotary ends 8 and 9; bushings 10, 11; gearing 12; plain bearings 13 and 14; inclined nozzles 3 and 4; armored plates 15; nozzles 16; castle connections 17 and 18; clearances 19 and 20; asbestos cord 21; protrusions 22-24 and 25-27; staples 28; bearing bearings 29; rotary pins 30 and 31; threaded elements 53 and 54; holes 32; thermometer 33; hatches 34-36; platform 37; gear wheel 38; casing 39; teeth 40; throttle 41; inner surface 42; plates 43; material 44; section 45; prefabricated half rings 46; horizontal central axis 47; rotary node 48; balls 49; wave profile 50; plates 51; working inner surface 52.

 An example of a ball mill, taking into account distinctive features from the prototype.

 A ball mill, comprising a rotatably mounted drum (2) with balls, a receiving (3) and discharge pipe (4) and a drive (1), characterized in that the discharge pipe (4) is offset relative to the main vertical axis of the mill, with each the end faces (8 and 9) of the mill in the bushings (10 and 11) are receiving spiral guiding ribs (12 and 13), oppositely directed relative to each other, one of the ends of the mill is equipped with gearing (14) with a drive, sliding bearings (15 and 16) are made prefabricated, receiving and unloading nozzles equipped with plates having lock joints on the side of the ends (17 and 18), while the end walls of the bearings have gaps (19 and 20) for laying asbestos cord (21) in them, the separated bearing housings are provided with protrusions 22-24 and 25-27 and brackets 28 closed on their surface that provide mounting of bearing bearings (29), the bearing surfaces of the pivot pins (30 and 31) are equipped with mounting threaded elements (53 and 54) and holes (32) for installing thermometers (33), each bearing housing is equipped with supply and removal of coolant, according the length of the drum is made three hatch (34-36) equally displaced relative to each other for loading and unloading and performing technical inspection, while the service pads (37) are shifted to one side and symmetrically relative to the vertical main axis of the drum, while the gear wheel is relative to the hatch (38) is closed by a casing (39), in which directly inductance chokes (41) are located directly opposite the teeth (40), the inner surface (42) of the drum is provided with wave-like plates with X-shaped ends, moreover, the bearings the bearings are equipped with a forced oil supply, on the outside the drum is closed by at least seven sections (45) consisting of prefabricated half rings (46), the bearing units for installing the mill are opposed, and the axis of the water-cooled rotary unit (48) of the drive is offset relative to the central axis (47) of one of the bearings.

 An example of a ball mill.

A ball mill, comprising a rotatably mounted drum (2) with balls, a receiving (3) and discharge pipe (4) and a drive (1), is made in such a way that:
1. the discharge pipe (4) is offset from the main vertical axis of the mill;
2. from each end (8 and 9) of the mill in the bushings (10 and 11) there are receiving spiral guide ribs multidirectional relative to each other (12 and 13);
3. one of the ends of the mill is equipped with gearing (14) with a drive;
4. Plain bearings (15 and 16) are prefabricated;
5. receiving and unloading nozzles are equipped with plates having lock joints from the ends of the ends (17 and 18);
6. end walls of bearings have gaps (19 and 20) for laying asbestos cord in them (21);
7. The divided bearing housings are equipped with protrusions 22-24 and 25-27 and brackets 28 closed on their surface, which ensure the installation of bearing bearings (29);
8. the zones of the supporting surfaces of the pivot pins (30 and 31) are provided with mounting threaded elements (53 and 54) and holes (32) for installing thermometers (33);
9. each bearing housing is supplied with coolant inlet and outlet, along the drum three hatchways (34-36) equally displaced relative to each other are made along the drum for loading and unloading and performing technical inspection;
10. platforms (37) for maintenance are shifted to one side and symmetrically with respect to the vertical main axis of the drum;
11. relative to the hatch, the gear wheel (38) is closed by a casing (39), in which directly triggered chokes (41) are located directly opposite the teeth (40);
12. the inner surface (42) of the drum is provided with wave-shaped plates with X-shaped ends;
13. the bearings are equipped with a forced oil supply, the drum is closed from the outside by at least seven sections (45), consisting of prefabricated half rings (46);
14. The bearing units for installing the mill are opposed;
15. the axis of the water-cooled rotary assembly (48) of the drive is offset from the central axis (47) of one of the bearings;
16. the mill is made with the possibility of dropping balls 49 along a predetermined path, providing a high-speed grinding of material from 4-50 t / h or more, relative to the wave-like profile 50 of plates 51 of the working inner surface 52 of the rotary drum of the mill, designed for the combined completion of the movement of each of the fallen balls into the environment of the crushed material of the natural shelf.

 Mills can be made with the right and left execution of the drive.

 The mill drive allows reverse rotation, which increases the term of use of bushes with guide ribs, which can be replaced in case of one-sided wear, and the reverse helps to correctly regulate the wear of the plates and change the trajectory of the grinding balls in contact with the plates. The possibility of changing the position of the air dampers helps to regulate the flows of the circulating and dispersible material during the operation of the ball mill.

 To lubricate the mill, lubricants known from practice are used, selected according to GOST 20799-75, GOST 3333-55, GOST 3781-53, GOST 12811-67.

 Due to the thermal expansion of the bearing mating surfaces, the optimum clearance between the end wall of the thrust bearing is taken into account.

 The given example of a ball mill is designed for a coolant flow rate of 50 l / m, an auxiliary drive gearbox cooling of 105 l / m, and cooling of the oil station requires a coolant flow rate of 175 l / m.

 The industrial usefulness of the new technical solution lies in a high degree of utility when used for finely grinding carbide materials with a productivity of 4-50 t / h or more.

 The economic efficiency of the new technical solution consists in taking into account the increased criteria of productivity and grinding quality based on the calculated trajectories of the movement of balls and material, as well as by reversing the movements of the drive mechanisms and air flow supply systems.

Claims (1)

 A ball mill, comprising a rotatable drum with balls, a receiving and unloading nozzle and a drive, characterized in that the unloading nozzle is offset relative to the main vertical axis of the mill, and there are receiving spiral guiding ribs opposite to each other from each end of the mill, one from the ends of the mill it is equipped with gearing with a drive, the sliding bearings are prefabricated, the inlet and outlet nozzles are equipped with plates having side The ends of the lock joints, while the end walls of the bearings have gaps for laying asbestos cord in them, the separated bearing housings are equipped with protrusions and brackets closed on their surface, which provide mounting of the bearing supports, the areas of the bearing surfaces of the pivot pins are provided with mounting threaded elements and holes for installing thermometers , each bearing housing is supplied with coolant inlet and outlet, along the drum three hatchways are made equally spaced relative to each other for loading and unloading and technical inspection, while the service platforms are shifted to one side and symmetrically with respect to the vertical main axis of the drum, the gear wheel is covered with a casing relative to the hatch, in which forcibly triggered chokes are located directly opposite the teeth, the inner surface of the drum is equipped with wave-like X- plates with shaped ends, the bearings are equipped with a forced oil supply, from the outside the drum is closed by at least seven sections, consisting of prefabricated half rings, moreover, the bearing units for installing the mill are opposed, and the axis of the water-cooled rotary drive unit is offset from the central axis of one of the bearings.

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