BG110798A - MULTI BODY - Google Patents

Abstract

The invention relates to a grinding body for crushing and grinding of ores, rock or earth masses, inert and any other materials in drums and other mills. It is used in ore enrichment, in the manufacture of building materials and in other industries. The grinding body has the form of or close to a spheroidal tetrahedron having six edges, four vertices, and four hemispherical sides. The six edges are typically arcs of the same length of a circle, but they can also be solved as variants in which the arcs of three edges extending from the same peak are of equal length but differ in length from the arcs of the other three edges, which are also of the same lengthwise arcs between them. The edges of the tetrahedra may be arcs of other geometric curves, such as arcs of parabola, spiral, and others. In another embodiment for better manufacturing technology, for example by casting, there is a spot on at least one of the sides of the grinding body. The blob may be bevel or rounded more or less convex or concave. On top of one of the sides of the body a short flat-headed cylinder may be formed. In another embodiment, circumferential parts of the cylinder are formed over three of the tips and three sides. In another embodiment, at least one of the tetrahedron peaks is flattened with a plane perpendicular to or inclined with respect to the axis of the body. In another embodiment, the bevel tip is rounded more or less concave. In a further embodiment,

Description

Technical field

The invention relates to a grinding body for the crushing and grinding of ores, rock or earth masses, inert and any other material in drum and other mills. It is used in ore enrichment, in the production of construction materials, in the production of coal dust, in the processing of waste and in other industrial sectors.

BACKGROUND OF THE INVENTION

The commonly used grinding body for sphere-shaped drum mills is known. The disadvantages of spherical grinding bodies are their low productivity, the slow shattering of the larger particles of the materials due to the lack of edges and the insufficient compaction of the mill work space. Other milling bodies with tetrahedral shapes, having smooth or rounded sides, are known [DE 440 198/1927, FR 811 408/1937, SU 1 388 088/1985, RU 2 305 597/2005].

the disadvantage is that they are non-technological for mass production and have not yet found practical application. An international patent application for a grinding body patent is also known [WO2010 / 094091 (26.08.2010)], which is a tetrahedron and overcomes the non-technological nature of the above bodies. Also known is a cube-shaped grinding body [US 1 431 475/1920], which has also not been used because of its non-technological mass-produced form, and the grinding experiments carried out using similar grinding bodies are cubic-shaped, showed poorer production results than spherical grinding bodies (Norris GS, Some Grinding Tests with Spheres and Other Shapes, Trans. Inst. Min. Metal, London, Feb. 1954, 63 (567), pp. 197-209).

SUMMARY OF THE INVENTION

It is an object of the invention to provide a grinding body with a mass-production technology that is also capable of crushing and grinding the materials fed into the mills quickly and efficiently.

The task is solved by creating a grinding body that has the shape of or close to a spheroidal tetrahedron. This grinding body has six edges, four vertices and four hemispherical sides. The six edges of the tetrahedrons are usually arcs of a circle of equal length, but can also be solved as variants in which the arcs of three of the edges extending from the same vertex are of equal length and different in length from the others. three edges, which are also the same lengthwise arcs with each other. The centers of the radii of the arcs at the edges of the tetrahedron may also be located beyond its vertices. The edges of tetrahedrons can also be arcs of other geometric curves such as arcs of a parabola, spiral, and others. In a further embodiment, for better fabrication fabrication, for example by casting, a flat spot having a circular or other shape is formed on at least one side of the tetrahedron.

In another embodiment, a short, flat face cylinder is erected on one side.

In other embodiments, the stain is more or less convex or concave with respect to the side of the tetrahedron of which it is formed.

In another embodiment, parts of a cylinder are formed through three of the tetrahedron peaks and on each of the three sides.

In another embodiment, at least one tip of the tetrahedron is planarly inclined with a plane that is perpendicular or inclined to the axis of the tetrahedron, which extends through the apex before the bevelling and through the center of the tetrahedron.

In another embodiment, the tapered tip is more or less concave - rounded in

the beveled part.

In another embodiment, a short cylinder or short prism is erected on the beveled top, which has a close-to-triangle cross-section, both having flat faces.

In a further embodiment, a circumferential ring is circulated through three of the tetrahedron peaks, having a cross-section close to the circumference, the ring being more or less convex to the sides and edges of the tetrahedron. In another embodiment, the circumferential ring has a section close to the triangle more or less convex. In another embodiment, the circumferential ring has a cross-section close to a rectangle more or less convex.

The edges and tips of the described grinding bodies in the shape of spheroidal tetrahedra may be rounded, and the rounding may be part of a circle, spiral or other geometric curve.

The grinding body offered can be manufactured from a wide variety of materials, such as metals, ceramics, glass, etc., and the most commonly used mass-production technologies for such production are suitable for its production.

products.

The main advantage of the proposed grinding body according to the invention is its manufacturability, which enables it to mass-produce without problems the most commonly used technologies such as casting, stamping, rolling and others. Other advantages of this grinding body are the presence of edges and tips, which, even beveled or rounded, help to break up the porous particles of the milled materials faster. Another advantage of the grinding body is its ability, due to its specific shape, to arrange it more tightly in a given volume, ie. Compared to spherical grinding bodies, the same volume will collect more of the grinding body offered, which is also a prerequisite for greater grinding performance. In addition, the geometry of this body provides a larger contact surface between the individual bodies as well as between the bodies and the walls of the mills. Also, the surrounding surface of the proposed grinding body is larger than that of the spherical grinding body - at the same volumes and masses, which also leads to greater grinding performance than the previously used spherical grinding bodies.

Explanations of the annexed figures

The invention is explained in more detail by way of exemplary embodiments of grinding bodies shown in the accompanying drawings, where:

- Figure 1 is a front view of a grinding body shaped like a spheroidal tetrahedron having a flat spot on one side;

Figure 2 is a top plan view of the tetrahedron of Figure 1;

- Figure 3 is a front view of a grinding body in the shape of a spheroidal tetrahedron with a short cylindrical head with a flat face on one side;

- Figure 4 is a front view of a grinding body shaped like a spheroidal tetrahedron with a convex, more or less rounded spot on one side;

- Figure 5 is a front view of a grinding body shaped like a spheroidal tetrahedron with a concave rounded spot on one side;

- Figure 6 is a front view of a grinding body in the shape of a spheroidal tetrahedron with parts of a cylinder extending circumferentially through three of the vertices and on three sides of the tetrahedron;

Figure 7 is a front view of a grinding body in the shape of a spheroidal tetrahedron with at least one flat beveled tip;

- Figure 8 is a front view of a grinding body shaped like a spheroidal tetrahedron with a rounded concave flat beveled tip;

- Figure 9 is a front view of a grinding body shaped like a spheroidal tetrahedron with a flat bevelled tip and a circumferential ring that extends through three of the non-sloping peaks of the tetrahedron and on three sides and has a cross section close to it;

- Figure 10 is a section A-A of Figure 9 of the circumferential ring, which is in a circle-like shape, more or less convex to the sides and edges of the tetrahedron;

- Figure 11 is a front view of a grinding body in the form of a spheroidal tetrahedron with a flat bevelled tip and a circumferential ring, which extends through three of the tapered vertices of the tetrahedron and on three sides, and has a cross-sectional cross section;

- figure 12 is a section B-B of figure 11 of the circumferential ring, which has a shape close to a triangle;

- Figure 13 is a front view of a grinding body shaped like a spheroidal tetrahedron with a flat beveled tip and a circumferential ring passing through

three of the angled peaks of the tetrahedron and three of its sides and having a cross-section close to a rectangle;

- Figure 14 is a section C-C of Figure 13 of the circumferential ring, which is shaped like a rectangle.

Examples of carrying out the invention

Figure 1 shows an exemplary embodiment of a grinding body with a shape close to a spheroidal tetrahedron, with 1 denoting the flat spot on one side 2 of the tetrahedron. Edges 3 and peaks 4 are also indicated. Figure 2 is a top plan view of the grinding body of Figure 1, with sides 2, edges 3 and peaks 4 indicated.

Figure 3 shows an exemplary embodiment of a grinding body with a short cylinder 5 with a flat face 6 on one of the faces 2. Variants of grinding bodies of figures 1 and 3 are most suitable for casting production.

Figure 4 shows a front view of the grinding body with a more or less convex stance 7 with a circular shape on one side of the tetrahedron. Figure 5 is a front view of a grinding body with a rounded concave with respect to the side 2 on which a circular-shaped spot 8 is located. Figure 6 is a front view of a grinding body shaped like a spheroidal tetrahedron with parts of a cylinder 9 extending circumferentially through three of the peaks 4 and three of the sides 2 of the tetrahedron. Figure 7 shows a front view of a grinding body with a flat beveled top 10. Figure 8 shows a front view of a grinding body with a shape close to a spheroidal tetrahedron with a flat beveled and rounded concave tip 11. Variants of the grinding bodies of figures 4, 5, 6, 7 and 8 are suitable for press and hammer production.

Figure 9 shows a grinding body shaped like a spheroidal tetrahedron with a flat beveled top 10 and a circular ring 12 with a cross section close to it. Figure 10 shows a section A-A of Figure 9 of the circumferential ring 12, which is in the form of a circle, more or less convex with respect to the sides 2 and the edges 3. In figure 1, a grinding body of a spheroidal tetrahedral shape with a flat beveled top 10 and a circumferential ring 13 having a cross-section close to a triangle. Figure 12 shows a section B-B of Figure 11 of the circumferential ring 13, which has a shape close to a triangle. Figure 13 shows a grinding body shaped like a spheroidal tetrahedron with a flat beveled top 10 and a circumferential ring 14 having a cross section close to a rectangle. Figure 14 shows a section C-C of Figure 13 of the circumferential ring 14, which has a shape close to a rectangle. The variants of Figures 9, 11 and 13 are best suited for mass production using forging presses.

Other technologies for manufacturing the grinding bodies shown in the figures are possible, for example by rolling and the like.

The above examples do not exhaust the possible variants for the technical implementation of the grinding body.

Claims (11)

Patent Claims A grinding body shaped like a spheroidal tetrahedron, characterized in that the three longitudinal edges of edges (3) extending from the same apex (4) have the same or different lengths with the arcs of the other three edges, which they are also of equal length with at least one of the sides of the body a flat spot (1) and / or a short cylinder (5) having a flat face (6) and through three of the peaks (4) and three of the sides ( 2) parts of a cylinder (9) are formed or a circumference ring (12, 13 and 14) is provided. Grinding body according to claim 1, characterized in that the arcs of the edges (3) of the body are of a circle or of another geometric curve. Grinding body according to claims 1 and 2, characterized in that the centers of the radii of the arcs of the edges (3) of the body can also be located outside the vertices (4) of the tetrahedron. Grinding body according to claim 1, characterized in that at least one of the vertices (4) of the body is planarly inclined (10) with a plane that is perpendicular or inclined to the axis of the tetrahedron. Grinding body according to Claims 1 and 4, characterized in that a short cylinder or short prism with a cross section close to a triangle is formed on the flat beveled tip (10) of the body, both with flat faces. Grinding body according to claims 1 and 4, characterized in that the flat beveled tip (10) of the body is rounded more or less concave (11). Grinding body according to claim 1, characterized in that the spot (1) is circular or otherwise shaped and is flat or rounded more or less convex (7) or concave (8) relative to the side (2) of which is located. Grinding body according to claim 1, characterized in that the circumferential ring (12) is more or less convex in cross-sectional shape. Grinding body according to claim 1, characterized in that the circumferential ring (13) is more or less convex in cross-sectional shape. Grinding body according to claim 1, characterized in that the circumferential ring (14) is more or less convex in cross-sectional shape. Grinding body according to claims 1 to 10, characterized in that all the edges and vertices of the body can also be rounded in part by a circle, spiral or other geometric figure.