CN85101784B - Lining for ball grinder - Google Patents

Abstract

The present invention relates to an inner lining (16) used in cylindrical ball mills. In a combined structure, the inner lining (16) is provided with grooves (4) and ribs (9), wherein the grooves (4) are continuously distributed approximately in a circumferential direction; the ribs (9) are arranged among the grooves (4). In addition, the inner lining (16) is provided with bulge parts (6) and/or sunken parts (7) transversely arranged corresponding to the circumferential direction, which allows sufficient fine milling between balls and the grooves. Through the bulge parts (6) and/or the sunken parts (7), the balls bulged to higher positions are better stirred in a ball pipe so as to finish coarse milling. In summary, milling efficiency is greatly improved.

Description

The liner that is used for ball mill

The invention relates to the liner that is used for cylindrical ball mill.Such cylindrical ball mill is called as tube mill, and the liner of above-mentioned tube mill is made up of liner plate usually.If liner is smooth, between ball and liner, only there is the some contact.Because smooth liner, so the milling effect between ball and liner is very low, simultaneously since smooth lining ball stirred seldom, so the effect of milling between ball and the ball is quite low in the ball heap.Because ball directly contacts liner, so the noise that produces is just quite big.People know, to liner groove is set, this groove roughly is continuous in a circumferential direction, as in sectional view, seeing, groove has the profile just like the represented radius of curvature of figure, in known ball mill, this groove radius of curvature is roughly consistent with the radius of curvature of biggest ball, and also having represented among the figure has muscle between groove.In said these grooves, stoped the material that pulverized play in a lateral direction basically at groove.The material of being milled is maintained in the groove, as the transition zone between liner and the ball.Like this, between ball and the groove, formed the line contact between ball and the quilt material of milling on the other hand on the one hand.In fact, the milling efficiency between ball and the liner improves widely, and owing to the material of being milled is arranged between liner and ball, thereby reduced sizable noise.Material by the quilt that is contained in the ball mill is milled acts on crushing force on the ball, and when rotating, ball is also made minor rotation together, the ball heap is also stirred to a certain degree, yet this does not reach enough effects of milling in the ball heap.Thereby the effect of milling only mainly obtains between the groove of ball and liner.Said structure is called trench liner.People also know, a smooth liner without any groove can be provided with projection and the negative area transversely arranged with respect to circumferencial direction, because projection and negative area are pushed to ball come.Just be called lift portion.On the direction that ball mill rotates, ball is rotated together by lift portion.Ball is just being stirred fully like this, just obtains very big milling efficiency in the ball heap.Ball is topmost thrown down, and percussion ball row.The percussion that the percussion ball produces, the bulky material that the result will be milled pulverizes.In such structure, contacting between ball and the liner is a contact, and the result has between ball and liner to the low-down effect of milling, even the effect that can not get milling.The liner that the direct percussion of ball is exposed, thus very big noise sent.In these two kinds of structures, promptly in having the inner lining structure of groove and having in the lining structure of lift portion, milling efficiency all is unfavorable.

The objective of the invention is to improve milling efficiency.In order to address this problem, the present invention combines the feature of above-mentioned various known liners, be that the liner inner surface has relative circumferencial direction transversely arranged corrugated projection and negative area, it is characterized in that liner also has continuous in a circumferential direction groove and muscle, muscle is arranged between the groove, and the bottom surface of groove and muscle all have bossing and negative area.

In such structure, groove can be just in time continuous in a circumferential direction, and is perhaps continuous along helix in a circumferential direction.

The present invention mutually combines the advantage of the liner that has continuous groove in a circumferential direction and the advantage with liner of lift portion by said structure, and does not have the shortcoming of these two kinds of structures.One deck material of being milled is placed between the outermost ball of groove and formation ball heap.Can the material of being milled be finish grinded like this, and in fact the noise that produces has reduced.Because lift portion, ball and the material of being milled are pushed together on the direction that ball mill rotates and play higher position.In the ball heap, ball and the material of being milled are stirred consumingly, so that improve the corase grind in the ball heap.In rotation process, the ball of highest point is thrown ball respectively and is listed.Therefore, the impact forces of generation is that the most of material of not milled that is in because of its low-gravity on the ball heap is pulverized.In addition, also improved the stirring of the ball in the ball heap.In the ball heap, the material of being milled is roughly ground between ball and ball.And the wavy texture of the bottom surface of groove and the rib of muscle has not only improved the possibility of ball being shifted onto higher position, also has such advantage simultaneously, and promptly ball rotates in the profile of groove imperturbably, and does not disturb vibrations, thereby can finish grind in groove.

This structure is preferably such, corrugated bossing and negative area in the bottom of groove, and projection of the corrugated on the rib of muscle and negative area continue respectively, and are disposed on the identical generatrix of liner.The result has produced such advantage, no matter the i.e. high low degree of negative area and bossing, it is equal that the degree of depth of groove roughly keeps, so that ball is remained in the groove.According to most preferred embodiment of the present invention, groove has identical cross-sectional profiles on the whole circumference of liner, and the material of milling of the quilt in groove is pulverized on whole length of groove equably.Between ball and groove, will can not interrupt by the formed intermediate layer of material of being milled.Maintenance weakens layer by the noise that is formed by the material of being milled and is not destroyed, and again because the bellows-shaped of the rib of bottom land and muscle, when ball mill rotated, ball is rotation therewith reliably.Certainly, the impact bead row have produced some noises, and still, material bed by what mill in groove, noise is reduced significantly.

Usually, liner is made up of each plate, and promptly so-called liner plate is formed.In a circumferential direction, the liner plate that is in contact with one another forms an arch, and in each and every one arch, these liner plates all remain on their position at this.According to most preferred embodiment of the present invention, in the liner of this form, liner plate is separated in the crest of waveform and valley regions respectively, and liner plate is thicker than the thickness in the position of trough at the thickness of the position of crest certainly.Owing at crest plate is separated, improves arching by the thicker part of iron plate.Special benefits of the present invention is not have screw on the liner, utilizes arching that liner plate is fixed on the wall of tube mill because in no Screw hole structure only be.

In the accompanying drawings, with embodiment the present invention is described roughly.

Accompanying drawing is represented is a liner plate that is used for forming the liner of tube mill.

Accompanying drawing 1: the sectional view of cutting open along the line I-I in the accompanying drawing 2;

Accompanying drawing 2: along the vertical view on the direction of the arrow II of accompanying drawing 1;

Accompanying drawing 3: the sectional view of cutting open along the line III-III in the accompanying drawing 2;

Attached Figure 4 and 5 are represented the tube mill that liner is arranged;

Accompanying drawing 4: the sectional view of cutting open along the line IV-IV in the accompanying drawing 5;

Accompanying drawing 5: the sectional view of cutting open along the line V-V in the accompanying drawing 4;

The outer surface (1) of liner plate (2) is columniform, and the radius of locating surface (1) is equivalent to the incurvature radius of the shell of tube mill.The inner surface (3) of liner plate (2) has groove (4), and the bottom surface (5) of groove (4) is rugose in a circumferential direction.Liner plate (2) at the thickness of the position of crest (6) than thick in the position of trough (7).According to cross section shown in Figure 1, the rib (8) that is arranged in the muscle (9) between the groove forms wavy and continuous equally, and rib (8) is equidistant with respect to groove bottom (5).The cross-sectional profiles (10) of groove (4) respectively on the whole circumference of liner with all be the same on whole length at groove.(11) are located in the side, because these sides nestle up adjacent iron plate (2), muscle (9 ') only has half of muscle (9) width.The front (12) that along the circumferential direction go up to limit iron liner plate (2) be incline material and along the axis direction deflection of tube mill, stretch diametrically.When these iron plates (2) when assembling, have just been formed arching, particularly, arching has been strengthened because front surface (12) is set at the zone of crest (6).

Hole (13) is used when installing to iron plate (2) on the tube mill with screw, because quite thick on the iron plate (2) in the zone of crest (6), this hole (13) can save, in this case, in the shell of tube mill, only fix iron plate (2) by arching.

Fig. 4 and Fig. 5 represent tubular type pulverizer or ball mill with cross section and longitudinal cross-section respectively.Cylindrical outer casing (14) is driven in rotation on the direction of arrow (15) indication, and liner (16) is housed in shell (14), and liner (16) is to be combined to iron plate shown in Figure 3 (2) by Fig. 1.These iron plates (2) cover whole inwalls of cylindrical outer casing (14).Groove (4) is continuous on whole inner periphery, and crest (6) and trough (7) form lift portion, and lift portion goes up ball heap (17) with it together and rotates in direction of rotation (15).With dashed lines (18) is illustrated in and revolves than piling (17) formed surface by ball in the process.The ball heap is pushed and plays height (19).Ball falls from height (19), impacts the ball row, label (20) expression of ball row.

Claims (1)

1, the liner (16) that is used for cylindrical ball mill, its inner surface has transversely arranged corrugated bossing (6) of relative circumferencial direction and negative area (7), it is characterized in that inner surface also has continuous in a circumferential direction groove (4) and muscle (9), muscle is arranged between the groove, the bottom (5) and the muscle (9) of groove (4) all have bossing (6) and (7), bossing and the negative area on the rib (8) of muscle (9) is continuous respectively with negative area for corrugated bossing on the bottom surface (5) of groove (4), and be arranged on the same generatrix of liner (16), groove (4) has identical cross-sectional profiles on the whole circumference of liner (16).

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