JPS5817662B2 - Lifter in rod mill - Missing liner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liner arranged in the center of an end-periphery discharge type and an overflow type of a mill using a rod (hereinafter abbreviated as rod mill).

Regarding the discharge liner arranged in the center of a central peripheral discharge type rod mill not based on the above-mentioned type, this applicant has filed patent application No. 131084 of 1973 and patent application No. 0 of 1982.
42172, and regarding the liner 1 having a lifter, which is the basis of the filed invention, there are several patented inventions based on the rod mill liner of Patent No. 574843, and the above patented invention also applies to the present invention. However, the present invention uses the liner 1 of the above-mentioned patented invention in the liner arranged in the center of the end peripheral discharge type and overflow type rod mill.
By cutting out a part of the rift and forming a predetermined space, the curvature of the rod is alleviated, the derivation rate of all liners is equalized, the life of the liner is extended, and the service life of the rod is extended. The predetermined cutout shape allows the crushed ore to flow out smoothly without being over-pulverized.

Regarding the above-mentioned bending of the rod, the phenomenon, reason, and countermeasures thereof are described in detail in Patent Application No. 131-084 of 1972.

The main point is that the wear and tear of the liner and the liner with the lifter is closely related to the interlocking of the rod, and in order to suppress the peculiar phenomenon caused by twisting of both ends of the rod and curving of the entire rod, external force applied to the center of the rod is necessary. Therefore, it is important to provide a cushioning effect by alleviating the external forces exerted on the central part of the rod.For this purpose, the above-mentioned invention provides a predetermined space in a part of the lid at the central part of the rod mill to relieve the external force applied to the central part of the rod. The rod is formed to soften the curvature of the rod.

The present invention not only relieves the curvature of the rod in the center of an end peripheral discharge type and overflow type rod mill that is not a central discharge type, but also takes a predetermined cutout shape in a predetermined space in the same way as the above-mentioned invention. This facilitates the flow of the crushed ore.

The structure will be explained below based on an example. Fig. 1 and Fig. 2 are developed arrangement diagrams of liners obtained by cutting and developing an overflow type rod mill and an end peripheral discharge type rod mill in the axial direction, respectively. This is the liner of the present invention, and its plan view is shown in FIGS. 3 and 5.

The shape of the missing part is the same in both Figures 3 and 5, but the liner attachment shown in Figure 5 from the top is symmetrical to the lifter missing liner 2' in Figure 3. It is of type.

That is, although the missing point a in FIG. 3 and the same point a' in FIG. 5 are in different positions, the liners 1 in FIG. Therefore, the points a+a' differ by the amount of the deviation.

Due to this difference, the points a+a' of the lifter-deficient liners 2, 2' arranged in FIG. 1 can be mounted on a horizontal straight line.

To explain in detail the shape of the lifter-deficient liner 2 shown in FIGS. 3 and 4, it is located at both ends (
A space 5 is formed by providing a curved vertical slope 7 having a slope of a predetermined angle from points a and a, respectively, in the refuku 3.

What is shown in FIG. 8 shows another embodiment of the present invention, which will be explained based on FIGS. A liner with a length L in which a vertical slope 7 of the shape of the shape is missing at one end of the lifter 3 is referred to as a liner 10 with a missing lifter on one side, and a liner with a length L' is referred to as a liner 11 with a missing lifter on one side. The liners 10' each have a symmetrical structure.

11', the arrangement of the liner shown in FIG. 11' The single-sided lifter-missing liners of the liner 10' are arranged on the left and right sides of the liner 11', and the respective vertical slopes 7 are similarly constructed by sandwiching the width W of the space liner 9, and these are sequentially arranged around the circumference. It is arranged in the direction of
The shape of the space in the longitudinal section is the same as or similar to that shown in FIG.

The width W is appropriately selected depending on the length of the rod mill, etc.

With the above structure, it is possible to improve economical efficiency without impairing the prevention of abnormal wear of the rod and equalization of the wear rate of the liner, and also to ensure smooth movement of the crushed grains from the vertical slope 7 in the axial direction. It enables outflow and prevents excessive grinding, thereby effectively contributing to improving productivity.

In addition, the liner of the present invention may be arranged in a plurality of rows in the circumferential direction in addition to the central part, and if the rod is long.

[Brief explanation of drawings]

Fig. 1 is a developed arrangement diagram of the liner cut and developed in the axial direction of an overflow type rod mill, Fig. 2 is a developed arrangement diagram of the same as above of the end peripheral discharge type rod mill, and Fig. 3 is the present invention in which a part of the lifter is missing. Figure 4 is a cross-sectional view of the center of Figure 3; Figure 5 is a symmetrical view of Figure 3; Figure 6 is a cross-sectional view of the center of Figure 5; Figure 7 is a cross-sectional view of the center of Figure 5; 8 is a cross-sectional view taken along the line A-A', FIG. 8 is a developed arrangement view of the central part of a rod mill with liners arranged as another embodiment of the present invention, and FIG. The shape of the liner forming the space, FIG. 10 is a front view of FIG. 9, FIG. 11 is a plan view showing the shape of the liner used as another embodiment of the present invention, and FIG. 12 is FIG. 13 is a sectional view taken along the line BB' in FIG. 11. In the figure, 1 is a liner, 2 is a liner with a missing lifter, 3 is a lifter, 4 is a liner base, 5 is a space I, 6 is a space area surface, 7 is a vertical slope, 8 is a bolt mounting hole, 9 is a space liner, 10 is a one-sided lifter-missing liner, 11
is a liner with one side lifter missing.

Claims (1)

[Scope of Claims] 1. In a liner used in the center of an end-periphery discharge type or overflow type rod mill, the liner lid is cut out in the axial direction in the shape of a ship, and the center circle of the rod mill is cut out. A liner with a lack of a refuku in a rod mill, characterized in that by forming a continuous space in the circumferential direction, the bending of the rod is relaxed and the ore is allowed to flow out smoothly. 2. In a liner used in the center of a peripheral discharge type or overflow type rod mill, one axial end of the lifter in the liner is an inclined edge, and the liner without a lifter is sandwiched in the axial direction to form the inclined edge. A refuku defect in a rod mill characterized by arranging the edges facing each other and forming a continuous space in the circumferential direction at the center of the rod mill, thereby making it possible to alleviate the bending of the rod and to allow the ore to flow out smoothly. Set liner.