JP2008142658A - Crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly feed a raw stone loaded from a supply side or a raw stone being crushed to a discharge side. <P>SOLUTION: A plurality of sending projects 1 are formed in the inner side of a drum 11 in the end face 11a in the supply side where a supply port 12 of a raw stone Sa is formed. The surface of the sending projects 1 is made to have an inclination face in an inclination direction to flick the raw stone Sa slantingly above the discharge side when cast from the supply port 12 to collide it. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a crusher such as a rod mill or a ball mill, and more particularly to a feed structure in a drum of an object (raw stone) to be crushed by the crusher.

  Among the crushers described above, there is a conventional rod mill as shown in FIG. (A) is sectional drawing of the whole rod mill 20, (b) is sectional drawing by line IV-IV of (a). As shown in the figure, the rod mill 20 includes a cylindrical rotary drum 11 whose both end faces are closed. The left end surface (supply-side end surface 11a) of the rotary drum 11 (hereinafter also simply referred to as drum 11) is a supply side of the raw stone Sa (for example, rock, ore), and the supply-side end surface serves as the supply port 12 thereof. 11a is provided with a perfect circular opening around the cylinder axis. The raw stone Sa is put into the drum 11 from the supply port 12 through a shooter 21 from a hopper (not shown). A reinforcing plate 13 for reinforcing the supply side end surface 11a is provided inside the drum 11 inside.

  The drum 11 is rotated around its horizontal axis by a rotation drive mechanism (not shown) with the cylinder axis being horizontal, and a plurality of rods (not shown) (not shown) are used as a crushing medium together with the raw stone Sa in the drum 11. Steel rod) and the rod rolls and falls on the inner surface of the drum 11 to collide with the raw stone Sa, and the raw stone Sa directly collides with the liner L disposed on the inner surface of the drum 11. Thus, the raw stone Sa is crushed by shearing, friction, and compression. In the case of a ball mill, a ball (iron ball) is introduced in place of the rod of the crushing medium in the rod mill.

  On the other hand, the right end portion of the drum 11 in the drawing is the discharge side, and there are provided discharge ports 14 at two locations on the peripheral surface of the drum 11 that intersect one diameter of the drum 11. The crushed stone Sb is discharged from the discharge port 14 to the outside of the drum 11 by the centrifugal force generated by the rotation of the drum 11.

  The discharge port for the crushed stone Sb is not provided on the peripheral surface of the drum 11 as described above, but the discharge side end surface 11b (the right side end surface in the drawing) is similar to the supply side supply port 12 on the drum 11 side. There is also a configuration in which a perfect circle opening (shown by a two-dot chain line in the figure and referred to as a discharge port 15) is provided around the axis. In this case, the diameter of the discharge port 15 is larger than the diameter of the supply port 12.

  This facilitates the discharge of the crushed stone Sb, and the rough stone Sa in the middle of the crushing accumulates so as to form a downward inclined surface 16 from the supply side to the discharge side. This is because the raw stone Sa is guided to the discharge side along the inclined surface 16. The inclined surface 16 is also formed in the above-described configuration in which the discharge port 14 is formed on the peripheral surface of the drum 11 described above.

  A hood cover 17 as shown in the drawing is attached to the right end of the drum 11 in which the discharge port 14 (or the discharge port 15) is formed so as to cover the drum 11 along its peripheral surface. The crushed stone Sb that has jumped out of the drum 11 from the discharge port 14 collides with the hood cover 17 and falls into the hood cover 17 in a state where the momentum due to centrifugal force is weakened.

  At the position where the crushed stone Sb of the hood cover 17 falls, a discharge port 18 opened to the outside of the hood cover 17 is formed large, and a belt conveyor 19 is disposed directly below the discharge port 18. The crushed stone Sb discharged to the outside of the hood cover 17 is transported by this belt conveyor 19 to the recovery position of the crushed stone Sb completely separated from the rod mill 20.

  By the way, the reason why the raw stone Sa introduced from the supply port 12 moves to the discharge side while being subjected to the crushing action is the difference in diameter between the supply port 12 and the discharge port 15 or the discharge port 14. Is provided on the peripheral surface of the drum 11 so that the raw stone Sa and the raw stone Sa in the middle of crushing are deposited so as to form a downward inclined surface 16 from the supply side to the discharge side, and the inclined surface 16 Although it is based on moving along, the intensity | strength of the movement to the discharge | emission side of the raw stone Sa and the raw stone Sa in the middle of crushing is very weak only by that.

  Therefore, in the wet crusher, in addition to the movement along the inclined surface 16 formed by the rough stone Sa and the rough stone Sa in the middle of the breakage, water is poured from the supply port 12 together with the rough stone Sa with a strong pressure, and the rough stone is caused by the water pressure. The shape is such that Sa is moved to the discharge side. However, if it does so, a water flow generator must be attached separately from the crusher, the entire system including the crusher becomes large, and capital investment increases. Naturally, this method cannot be used with a dry crusher.

  Accordingly, an object of the present invention is to allow the raw stone introduced from the supply port to be efficiently fed to the drum discharge side with a simple device configuration.

  In order to solve the above problems, the crusher of the present invention is provided with a plurality of “feed projections” such as screw shapes and ridges on the drum inner side of the end surface of the rotating drum provided with the raw stone supply port. In addition, each feed protrusion employs a configuration that is formed in such a shape that when the raw stone introduced from the supply port collides with the feed protrusion, the raw stone is repelled to the discharge side.

  Since it did in this way, the raw stone thrown in from the supply port is flipped off by the feed protrusion diagonally upward on the discharge port side, and is forcibly guided to the discharge side.

  Since this invention was comprised as mentioned above, since the rough stone supplied from the supply port is forcibly sent to the discharge side by the said feed protrusion, there exists an effect that crushing efficiency improves.

  In addition, as an apparatus configuration for that purpose, only the feed protrusion is provided inside the supply-side drum end surface, so that a device for generating a water flow is provided separately from the drum main body as described above, There is also an advantage that it does not become a large-scale device as a whole.

  Embodiments of the present invention will be described below with reference to the drawings. 1A is a sectional view of a crusher 10 (rod mill 10) according to the present embodiment, and FIG. 1B is a sectional view taken along line II of FIG. 1A. The basic structure of the crusher 10 of this embodiment is the same as that of the conventional example (rod mill 20) shown in FIG. Accordingly, the same elements are denoted by the same reference numerals and description thereof is omitted. The crusher 10 of this embodiment is different from that of the conventional example in the portion of the supply-side end surface 11a of the rotary drum 11.

  As shown in FIG. 1A, the supply-side end surface 11a of the drum 11 of the present embodiment is introduced from the supply port 12 in place of the reinforcing plate 13 provided in the conventional example on the inner side of the drum. That is, a “feeding ridge 1” for forcibly feeding the raw stone Sa to the discharge side is provided.

  And FIG. 2 extracted the supply side end surface 11a in which the feed protrusion 1 of the drum 11 of the crusher 10 of this embodiment was provided, and looked at the side in which the feed protrusion 1 was provided from diagonally. It is a perspective view. The side on which the feed protrusion 1 is provided corresponds to the inner side of the drum 11. FIG. 3 is a plan view in which the supply-side end surface 11 a of the drum 11 is projected onto a surface perpendicular to the axis of the drum 11. The direction of discharging the raw stone Sa is the direction from the back to the front of the paper, and the direction of rotation of the drum 11 is the clockwise direction in the figure.

  As shown in FIG. 2 and FIG. 3, quadrants along the circumferential direction are provided between the peripheral edge of the perfect circle (raw stone Sa) supply port 12 provided at the center of the supply-side end face 11 a and the outer periphery of the end face. In each of these areas, a feed protrusion 1 and a space for passing the raw stone Sa are provided.

  Each feed protrusion 1 is divided into three sections (surfaces) as shown in FIG. 2 and FIG. 3 of a plan view projected onto the supply-side end surface 11 a of the drum 11. The three-dimensional shape of each feed protrusion 1 as a whole will be described with reference to numerals 2, 3, and 4 attached to the respective surfaces. In the following description, the inner side of the drum 11 on the supply side end surface of the drum 11 provided with the feed protrusion 1 is referred to as a “reference surface”.

  First, a surface denoted by reference numeral 2 (hereinafter referred to as a second surface, and the same applies to the third and fourth surfaces) is a surface parallel to the reference surface. From the boundary between the second surface and the third and fourth surfaces, the third and fourth surfaces form an inclined surface that descends toward the reference surface. That is, the two surfaces are at the highest position from the reference surface in the feed protrusion 1.

  Of these, the third surface as a whole forms a downward inclined surface with reference to the second surface described above, but its surface forms an upwardly convex curved surface with a small curvature, and the fourth surface also As described above, a downward inclined surface is formed on the basis of the two surfaces, and the surface is a downward convex curved surface with a small curvature.

  Since each feed ridge 1 has such a shape, when the raw stone Sa introduced from the supply port 12 collides with the feed ridge 1, the discharge side of the drum 11 is obliquely upward by the inclined surfaces 3 and 4. It is supposed to be thrown away.

  In the area adjacent to the portion where the feed ridge 1 of each region is formed, that is, in the region sandwiched between the adjacent feed ridges 1, the raw stone Sa introduced therein is instantaneously fed to the feed ridge 1. The raw stone Sa that has fallen directly below, or the raw stone Sa that has fallen directly below, does not collide with each other. The raw stone Sa is also scooped up by the inclined surfaces 3 and 4 of the feed protrusion 1, and at the same time, it is blown off obliquely upward on the discharge side. A reinforcing plate 5 is attached to the reference surface in a region between the feed ridges 1 adjacent to each other as in the prior art.

  Thus, since the crusher 10 of this embodiment is equipped with the feed protrusion 1 as mentioned above in the drum 11 inside of the supply side end surface 11a, the raw stone Sa thrown into the drum 11 is the feed protrusion. It collides with the strip 1 and is blown off obliquely upward on the discharge side, and the raw stone Sa is smoothly fed to the discharge side without staying on the supply side. Therefore, crushing efficiency is improved.

  Further, since the “feed ridge 1” is merely provided on the supply-side end face 11a of the drum 11, there is no need to attach a water flow generator and increase the size of the apparatus unlike a wet crusher.

  In the present embodiment, the “protrusion” shown in FIG. 2 is adopted from the “feed protrusions” collectively referred to in the claims. However, the “feed protrusion” has the shape of the protrusion as described above. Not limited to this, it may be of “blade shape” like a screw of a ship. In short, what is necessary is just to have an inclined surface (including a curved surface such as a screw) so that when the raw stone Sa collides with the “feed protrusion”, it is flipped off to the discharge side. In the case of the crushing machine 20 that does not have this “feeding ridge 1”, the “projection” in the present embodiment is adopted as described in the configuration of the conventional example in the background art section. The reinforcing plate 13 is provided to reinforce the supply-side end surface 11a of the drum 11, but the screw-like shape is formed in the shape of a thick ridge to serve as the reinforcing plate 13 as well. is there. Therefore, the “feed projection” referred to in the present invention includes a “projection” as in this embodiment and a “blade shape” such as a screw.

  In this embodiment, the invention is applied to a rod mill, but it goes without saying that the invention can also be applied to a ball mill.

  The present invention is widely applicable to general crushers.

(A) shows a sectional view of the crusher of the present embodiment, and (b) shows a sectional view taken along line II in (a). It is the perspective view which extracted the supply side end surface in which the feed protrusion was provided of the drum of the crusher of this embodiment, and was seen from the diagonal. It is the top view which projected the inner side of the supply side end surface of the drum of this embodiment on the surface perpendicular | vertical to the axis | shaft of a drum. (A) shows a sectional view of a conventional example of a crusher, and (b) shows a sectional view taken along line IV-IV in (a).

Explanation of symbols

1 Feeding ridge 2, 3, 4 (Each component surface of feeding ridge)
DESCRIPTION OF SYMBOLS 5 Reinforcement plate 10 Crusher of this embodiment 11 (Rotating) drum 11a Supply side end surface 11b Discharge side end surface 12 Supply port 13 Reinforcement plate 14, 15 Discharge port 16 Inclined surface 17 Hood cover 20 Conventional crusher (rod mill)
Sa rough stone Sb crushed stone

Claims (1)

  A plurality of feed protrusions such as screw shapes and ridges are provided on the drum inner side of the end surface of the rotating drum provided with the rough stone supply port, and each of the feed protrusions is a rough stone introduced from the supply port. A crusher that is shaped so that when it collides with a feed projection, it bounces off the rough.

Images