CN2404586Y

CN2404586Y - Inner liner of bowl mill

Info

Publication number: CN2404586Y
Application number: CN 99253253
Authority: CN
Inventors: 张仲英
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-11-11
Filing date: 1999-11-11
Publication date: 2000-11-08
Anticipated expiration: 2009-11-11

Abstract

The utility model relates to a lining for a cylindrical ball mill, which is formed by the combination and assembly of a plurality of lining boards with double-inclined slope ladder type grooves. A lining surface is provided with a double-inclined slope ladder type groove, the radius of curvature of the groove is less than the radius of curvature of a maximum ball. Along the running direction of a mill, each liner plate takes a bolt hole center as a boundary and is divide into two slope sections along a circumferential direction; the front side is high, and the back side is low. A low point of the previous slope section is the same as the high spot height of the next slope section. A bolt hole is positioned on the crossing point between the high spot of the previous slope section and the low point of the next slope section. The bottom of the groove corresponding to the circumferential direction is in the form of a ladder with an inclined slope, and a rib is arranged between two grooves and is in the form of a ladder with an inclined slope. A ball can be lifted to a certain height. The utility model has the advantages of strong breaking force, strong abrasive force, and longer service life and is suitable for dry method ball mills and wet method ball mills.

Description

The ball mill liner

The utility model patent relates to the fragmentation and the pulverizing field of ordinary material, particularly a kind of cylindrical ball mill liner.

Because the capacity usage ratio of ball mill is very low, in order to improve mill efficiency, people further investigate the planform of ball grinding machine lining board.Usually liner is made up of the steel liner plate.Ladder lining board is a kind of liner plate with higher hoisting power, and its abradant surface is the plane, along grinding machine direction of rotation low side preceding, high-end after.Be characterized in having the impact grinding power of higher lifting force, ball big to ball.Therefore, mill feed size had stronger adaptability when big.But because its abradant surface is the plane, ball and lining are to contact.When the pellet impact material, around material will press to, can not make full use of its energy.When ball produced slip, milling zone also was a contact, and this part energy is wasted, and quickened wear liner.The Austria expert is by to reaching a conclusion after the system research of groove phenomenon: liner plate should not be designed to stepped and should design channel shaped, can utilize this part energy so better, and design the ring-shaped groove liner plate.Its groove roughly is continuous in a circumferential direction, and the radius of curvature of groove roughly the radius of curvature with biggest ball is consistent, in these grooves, stoped the horizontal looseness of grinding charge material basically at groove.Form the line contact between ball and the grinding charge material on the other hand, improved the grinding effect between ball and the liner greatly, and owing to the liner effect between liner and ball of grinding charge material, reduced the noise of grinding machine.But because its dribbling is highly low, impact grinding power is little, and particularly when mill feed material size was big, because of not can not get performance to material grinding advantage fully broken, the flute profile liner plate, the mill efficiency of grinding machine can not improve even reduce.Mill efficiency was poorer when therefore it was used for the wet method grinding machine.

The bolt that installs and fixes of ladder lining board and trench liner is positioned at each piece middle part, can directly be subjected to the impact of abrading-ball.Particularly wear liner is after a period of time, and this impact is even more serious, causes that liner plate frequently comes off, and has reduced the service life of liner plate, causes the certain economic loss.

The purpose of this utility model be exactly to provide that a kind of impact grinding power is strong, grainding capacity is high, fault rate is low and not only being applicable to dry method ball mill but also being suitable for the ball mill liner of ball mill by wet process of long service life.

For achieving the above object, adopt following technical scheme:

Described ball mill liner is to be arranged in order the liner that several are made of the steel liner plate on its circumferencial direction of ball mill barrel inwall upper edge; The liner plate surface is provided with a plurality of relevant grooves, muscle, double slanted ladder; Ball mill barrel and steel liner plate are assembled by bolting.

It is that the boundary is divided into two slope ladder sections at circumferencial direction, with the bolt hole center that groove, its bottom surface are arranged on the inner surface of the liner plate of described ball mill liner; The height of the height point on the low spot of previous slope section and a back slope section equates, each slope all be low side preceding, high-end after.Muscle, rib are arranged between two grooves, and rib is equidistant with respect to groove, and it is stepped that muscle and rib equally also are double slanted.

The liner plate surface of described ball mill liner is provided with a plurality of relevant grooves, and the radius of curvature of groove is less than the radius of curvature of biggest ball, contact to guarantee at 2 between ball and the liner plate, and ball is that line contacts with contacting of material substantially.Groove is discontinuous in a circumferential direction, and spiro keyhole position is in the junction of the high point of last slope section with back one slope section low spot.

Owing to adopt technique scheme, the utlity model has following superiority:

When described ball mill liner turns round, because ball slides along the liner plate surface material is produced abrasive action, also just material has been produced very effective extruding and shear stress, the rolling of ball simultaneously causes the rolling of other ball again, has increased the motion of whole abrasive body.The trapezoidal slope groove that is had can arrive certain altitude with spherical zone effectively, has guaranteed the crushing force of ball mill.The ingenious set bolt position that is provided with has been avoided the direct impact of mill ball, thereby has been reduced fault rate, prolongs liner service life.

Describe specific embodiment in detail below in conjunction with accompanying drawing:

Fig. 1: the liner plate overall structure cutaway view that is the ball mill liner;

Fig. 2: be the view on the direction of the arrow B among Fig. 1;

Fig. 3: be along the line C-C cutting plane among Fig. 2;

Fig. 4: the liner plate assembly structure and the user mode schematic diagram that are the ball mill liner;

Fig. 5: be the assembly drawing of showing liner plate along the line E-E cutting plane among Fig. 4;

The number in the figure explanation:

Muscle 19-liner between the outer surface 10-groove of 1-liner plate

Rib 20-ball mill barrel between the 2-liner plate 11-groove

The inner surface 12-peripheral side 21-set bolt of 3-liner plate

4-groove 13-axial sides 22-ball mill direction of rotation

The bottom surface 14-cross-sectional profiles 23-bolt hole of 5-groove

The low spot 15-ball on slope heap behind the 6-

The height point 16-ball on a slope is piled formed surface behind the 7-

The low spot 17-ball heap on the previous slope of 8-is taken up highly

The height point 18-ball heap drop point site on the previous slope of 9-

As shown in the figure, described cylindrical shape liner normally is made of the steel liner plate, and the outer surface (1) of liner plate (2) is columnar, and the radius of outer surface (1) is consistent with the incurvature radius of ball mill.On the inner surface (3) of liner plate (2) groove (4) is arranged, the bottom surface (5) of groove (4) is that to be the slope stepped in a circumferential direction; With center, lining-plate bolt hole (24) is the boundary, and along circumferentially being divided into two slope sections, the height of the high point (7) on the low spot (8) of previous slope section and a back slope section equates, each slope all be low side (6), (8) preceding, high-end (7), (9) after.Spiro keyhole position is in the junction of the last slope high point of section (9) with back one slope section low spot (6).According to section shown in Figure 1, it is stepped that the rib (11) that is arranged in the muscle (10) between the groove (4) forms the slope equally, and rib (11) is equidistant with respect to groove (4).The cross-sectional profiles (14) of groove (4), (14 ') respectively on the whole circumference of liner (19) with all be the same on whole length at groove.(12) are located and are nestled up adjacent liner plate (2) owing to these sides in the side, groove (4 ') only has half of groove (4) width, limit the side (12), (12 ') of liner plate (2) axis direction deflection in a circumferential direction, and prolong diametrically with respect to ball mill.When liner plate (2) when assembling, is fixed on the ball mill with bolt (21).

Fig. 4 and Fig. 5 represent ball mill with cross section and vertical section respectively.Grinding mill barrel (20) is driven in rotation by arrow (22) direction.At grinding mill barrel (20) inner surface, liner (19) is to be combined by Fig. 1, Fig. 2, liner plate (2) shown in Figure 3.These liner plates (2) cover whole inwalls of grinding mill barrel (20).Groove (4) is discontinuous on whole circumference, and preceding, high-end (7), (9) form in the back and promote structure along the low side (8) of arrow (22) direction liner plate (2), (6), promotes structure and ball heap (15) is gone up in direction of rotation (22) therewith rotate.With dashed lines (16) is illustrated in the rotary course piles formed surface by ball.The ball heap is taken up highly (17), and ball leaves down the impact grinding material from height (17).Because the set bolt (21) of liner plate (2) is between the low side (6) on a previous slope of liner plate (2) high-end (9) and a back slope, reduced the probability that ball (15) impacts set bolt (21).

Claims

1, a kind of ball mill liner is characterized in that: described ball mill liner (19) is to be arranged in order the some liners that are made of steel liner plate (2) on its circumferencial direction of ball mill cylinder inner wall upper edge; Liner plate (2) surface is provided with a plurality of relevant grooves (4), muscle (10), rib (11), double slanted ladder; Grinding mill barrel (20) inwall and steel liner plate (2) are by the fixing assembling of bolt (21).

2, according to the described ball mill liner of claim 1, it is characterized in that: it is that the boundary is divided into two slope ladder sections at circumferencial direction, with bolt hole (23) center that groove (4), its bottom surface (5) are arranged on the inner surface of the liner plate (2) of described ball mill liner (19); The low spot (8) of previous slope section equates with the height of the high point (7) of a back slope section, each slope all be low side (6) (8) preceding, height (7) (9) hold after.Bolt hole (23) is positioned at the junction of last slope high point of section (9) and back one slope section low spot (6); Muscle (10), rib (11) are arranged between two grooves, and it is stepped that muscle (10) and rib (11) equally also are the slope, and rib (11) is equidistant with respect to bottom land (5).

3, according to the described ball mill liner of claim 1, it is characterized in that: the radius of curvature of groove (4) is less than the radius of curvature of biggest ball on the inner surface of the liner plate (2) of described ball mill liner (19).