JPS61234955A - Pin mill - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention uses pins as a crushing medium to crush ores, etc.
This invention relates to a pin mill that grinds particles to m or less.

[Conventional technology]

Conventionally, pin mills house a rotating metal plate and a fixed plate facing each other in a grinding chamber, and a large number of metal pins, which serve as the grinding medium, are concentrically planted on the surfaces of these opposing plates. has been done.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional pin mill, since the pins of the grinding medium are made of metal, there are problems such as premature wear and a large amount of metal powder mixed into the ground material as impurities due to the wear.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a pin mill in which a large number of metal pins are implanted on the opposing surfaces of a rotary plate and a stationary plate, each of which is made of wear-resistant ceramics. It is constructed by fitting a cylindrical liner.

[Effect]

The outer periphery of the metal pin is covered with wear-resistant ceramic.

〔Example〕

Embodiments of the present invention will be described below with reference to FIG. 1, FIGS. 2a and 2b, and FIGS. 3a and 3b.

In the figure, 1 is a disk-shaped rotary disk made of metal attached to a horizontal rotating shaft 2, and on both sides of the rotary disk 1 are two stationary disk-shaped fixed plates (not shown) also made of metal. are placed facing each other. Near the outer periphery of both disk surfaces 1a of the rotary disk 1, a large number of cylindrical inner circumferential bottles 3 made of metal are installed on concentric circles centered on the rotating shaft 2. The inner circumferential bottle 3 serves as a crushing medium for crushing ores and the like, and has a flat notch 3a formed on the rotating shaft 2 side (upper side in FIGS. 2a and 2b). Each inner circumferential bottle 3 contains alumina (8l!03),
Tungsten carbide (WC), silicon carbide (Si)
C) A cylindrical inner bottle liner 4 made of a wear-resistant ceramic such as silicon nitride (SiJ*) is loosely fitted, and after curing, it is made of rubber such as a thermosetting silicone rubber adhesive. They are bonded together with an adhesive 5 having elasticity. Each inner pin liner 4 is provided in a cylindrical shape in phase with the inner pin 3 in order to restrict rotation relative to the inner pin 3, and has a notch 4a at a position corresponding to the notch 3a of the inner pin 3. is formed. In order to protect the base of the inner pin liner 4, a rectangular plate-shaped base liner 6 made of wear-resistant ceramic is placed on the board surface 1a of each inner pin liner 4 on the side of the notch 4a. glued in close proximity to.

It should be noted that a plurality of inner pin liners 4 may be arranged in series to form one inner pin liner 4 in order to simplify manufacturing or to cope with the difference in coefficient of thermal expansion with the inner pin liner 3.

A large number of rectangular notches 7 are radially provided on the outer periphery of both surfaces 1a of the rotary disk 1 so as to be located between adjacent inner peripheral pins 3. In this case, an outer circumferential bottle 8 made of metal and having a rectangular cross section is positioned on the outer circumferential side of the inner circumferential pin 3, and is planted perpendicularly to the board surface 1a on a concentric circle centered on the rotating shaft 2. . A rectangular cylindrical outer bottle liner 9 made of wear-resistant ceramic, like the inner pin liner 4, is fitted loosely into each outer pin 8, and is bonded with an adhesive 10 having rubber-like elasticity after hardening. and the outer bin liner 9
A buried portion 9a extending perpendicularly to the base of the rotary disk 1 is fitted into the notch 7 and is attached to the rotary disk 1 by a fixing member 11 such as a bolt with a gasket (not shown) interposed therebetween.

Note that, similarly to the inner circumferential pin liner 4, a plurality of outer circumferential bottle liners 9 may be arranged in a row to form a single liner.

On the other hand, on both surfaces 1a of the rotary disk 1, respective surfaces 1a are provided.
In order to protect the disc surface 1a, a large number of rectangular plate liners 12 made of wear-resistant ceramics are embedded radially with some parts protruding from the disc surface 1a. Further, in order to protect the outer circumferential surface 1b of the rotary disk 1, a large number of U-shaped outer circumferential liners 13 made of wear-resistant ceramics are buried with some parts protruding from the outer circumferential surface 1b. has been done.

Note that the board liner 12 and the outer peripheral liner 13 are
The respective outer surfaces may be aligned with the board surface 1a and the outer peripheral surface 1b without partially protruding from the board surface 1a and the outer peripheral surface 1b.

On the other hand, the plate surface of the stationary plate facing each plate surface 1a of the rotary plate 1 is provided with a rotating plate so that a large number of inner circumferential bins and outer circumferential pins do not come into contact with the inner circumferential bins 3 and outer circumferential pins 8 of the rotary plate 1. They are planted concentrically around axis 2, and within each
A cylindrical or prismatic liner made of wear-resistant ceramic is fitted onto the outer pin. Also, within
A plate liner, etc. is attached to the plate surface of the fixed plate with the outer circumferential pins installed, similar to the rotary plate.

In the above-mentioned embodiment, a bottle mill was described in which fixed plates were arranged on both sides of the rotary disk 1, but the rotary disk 1
It can also be applied to a bottle mill that has fixed plates facing each other on one side.

〔Effect of the invention〕

As described above, according to the present invention, the outer periphery of the metal bottle is covered with a cylindrical liner made of wear-resistant ceramics, so that the life of the pin mill can be dramatically increased compared to the conventional technology. . Moreover, no impurities are mixed into the pulverized material. Furthermore, the attachment of the liner to the bottle can be easily accomplished in a single hour.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts of a bottle mill showing an embodiment of the present invention, FIGS. 2 a and b are a front view and a side view of the inner peripheral pin,
Figures 3a and 3b are front and side views of the outer pin. 1------One rotation disk 1a------One disk surface 1b---Outer surface 2---One rotation shaft 3---Inner circumference pin 4------ −
1. Inner circumferential pin liner 7 ------- Notch part
8------One outer circumference pin 9---One outer circumference bottle liner 12------One disk liner 13------Outer circumference liner Inventor: Mr. Yamashita Inventor: Yoshihiko Imai Inventor Masatoshi Yamazaki Figure 1 Bronze Figure 2 (a) (b) Figure 3 (a)

Claims (1)

[Claims] A pin mill is constructed by having a large number of metal pins implanted on the opposing surfaces of a rotary plate and a stationary plate, which are arranged opposite each other, and each pin is fitted with a cylindrical liner made of wear-resistant ceramics. A pin mill characterized by: