JPH0645009B2 - Horizontal swirling centrifugal ball mill type crushing method and horizontal swirling centrifugal type ball mill type crusher - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a novel horizontal orbiting centrifugal ball mill type pulverizing method according to a pulverization technique, and a horizontal orbiting centrifugal type ball mill type pulverizer using the pulverizing method. .

[Conventional technology]

Conventionally, various pulverizers such as a repulsion type mill, a roll crusher rotary mill, and a vibration mill have been used for pulverizing powders such as stones and silica. By vibrating or rotating the loaded crushing container, gravity or centrifugal force is applied to the crushing medium to enhance the crushing effect.

[Problems to be solved by the invention]

However, since the crushing action of the conventional rotary mill depends only on gravity, it is necessary to make the diameter of the crushing container very large in order to reduce the particle size of the object to be crushed, and a long crushing time is required. It was a requirement.

Further, the vibration mill can eliminate the disadvantage that the diameter of the container becomes large like the crushing container of the rotary mill, but since the crushing container and its mounting base also vibrate with the same centrifugal effect as the crushing medium, The above strength must be increased and power consumption is also increased, and this device also has a problem that a long crushing time is required.

The present invention has been made in view of the above problems, and solves the problems of the above-described conventional apparatus, has a high crushing speed, is small and lightweight, and has a small power consumption (device idle operation input power). It is an object of the present invention to propose a method and to provide a horizontal rotary centrifugal ball mill type crusher for carrying out the method.

[Means for solving problems]

The horizontal swirling centrifugal ball mill type crushing method according to the present invention,
A crushing medium, which is provided in a cylindrical crushing container so as to be freely rollable along the inner wall, is accommodated together with a material to be crushed, and the crushing container is rolled on a cylindrical rolling surface having a diameter larger than its outer diameter. While freely inscribed, the rolling surface is horizontally swiveled to orbit the crushing container while rolling around the crushing container while rotating around the crushing container. A pulverized product is pulverized into fine powder between the inner peripheral surface of the pulverization container and the pulverizing medium and / or between the pulverizing media. , A cylindrical crushing container that is rollably provided along the inner wall and that can load and discharge a crushing medium, a swirling container having a cylindrical inner diameter that is larger than the outer diameter of the crushing container, and the swirling It is composed of a swirling circular motion generation mechanism that revolves the container along a circular orbit. Made to.

[Action]

As shown in FIGS. 1 and 2, the operation principle of the horizontal swirling centrifugal ball mill type crushing method is such that the crushing container 1 and the swirling container 2 are internally mounted so as to roll along the inner wall of the crushing container 1. The object to be crushed and the crushing medium are accommodated in and the swirling container 2 is swung in the horizontal direction with a predetermined amplitude.

Therefore, when the cylindrical crushing container 1 into which the balls 3 of the crushing medium and the object to be crushed a are put is placed vertically in the cylinder of the swirling container 2 and the swirling container 2 is swung in the horizontal plane, 1 causes a rolling circular motion along the inner wall of the swirl container 2. Therefore, the balls 3 in the crushing container 1 also perform rolling circular motion along the inner wall of the crushing container 1, a large centrifugal force can be generated in the balls 3, and the object to be crushed is crushed. It is crushed and crushed between the inner wall surface and the ball 3 and between the balls 3 and 3.

In order to roll the crushing container 1 in the swirl container 2, if the diameter of the crushing container 1 is D2 and the inner diameter of the swirl container 2 is D3, the amplitude of the swirl container 2 can be reduced in accordance with D3 / D2. It is possible to simplify the mechanical structure of the turning rotation generating mechanism.

This is because even if the centrifugal effect Ko of the device is small, the ball centrifugal effect Kb is generated by the inner diameter D1 of the swirling container 2, and the centrifugal effect K'b when the ball 3 is simply swirled in the circumference is called. By comparison, when the rotational angular velocity omega, a ^{Ko = Rω 2 / g Kb =} D3ω 2 / 2g K'b = D1ω 2 / 2g. Therefore, for example, if R = 25 [mm], D1 = 240 [mm], D3 = 400 [mm], ω = 41.9 [rad / sec] (400 rpm), Ko = 4.5 Kb = 35 .8 K'b = 21.5, Kb>K'b, and a large ball centrifugal effect Kb can be easily generated.

That is, not the centrifugal effect due to the turning of the device but the centrifugal effect due to the diameter of the swirling container 2 is obtained in the ball 3, so that the large centrifugal effect of the ball 3 can be obtained by increasing the diameter. This can improve the crushing speed of the object to be crushed.

〔Example〕

An embodiment of a horizontal orbiting centrifugal ball mill type crusher for carrying out the horizontal orbiting centrifugal type ball mill type crushing method according to the present invention will be described below with reference to FIGS. 3 and 4.

Reference numeral 10 is a mounting base of a shaft for generating a swivel motion. A shaft 12 is mounted on the base 10 via a bearing 11, and a rotary motion is generated by a pulley 14 'mounted on the lower part of the shaft 12 and a motor 13. It is transmitted to the shaft 12. The upper end of the shaft 12 is axially installed on the swivel base 14 via a bearing 11, and the upper and lower shafts of the shaft 12 are eccentric (eccentric width A / 2). When the shaft turns, the upper shaft turns with a turning radius of A / 2. Reference numeral 15 is a support rod that horizontally supports the swivel base 14 and prevents the swivel base 14 from rotating. The swivel base 14 is provided with a cylindrical bottomed swirl container 2 having an inner diameter D3, and the swirl container 2 is internally provided with a cylindrical grinding container 1 having an outer diameter D2. In this structure, the material to be ground is put into the grinding container 1 together with a large number of grinding media composed of spherical hard balls 3.

The horizontal rotating centrifugal ball mill type crusher having the above-described structure is provided with the crushing container 1 so as to roll along the inside of the rotating container 2, and the crushing container 1 has a large number of balls 3 to be crushed and a crushing medium. And the motor 13 is driven to rotate. By the rotational driving of the motor 13, the eccentric shaft 13 is swung via the pulley 14 ', and the swivel base 14 pivotally attached to the upper end of the shaft 13 is swung with a swiveling radius of the eccentric width A / 2.

The eccentric width A / 2 is for rolling the crushing container 1 in the swirling container 2. Therefore, it is not necessary to increase the amplitude, and therefore, there is a critical rotation speed as in the rolling ball mill. Without doing so, the crushing speed can be improved by increasing the rotation speed.

Further, the required power required for the drive unit to turn the ball is given by Pb∝ω ^B , B = 3.5 to 4.5 with respect to the rotation speed ω of the turning container 2.

In general, the rotational power consumption Po of the device is B = 1.0, so by increasing the rotational speed as much as possible, the proportion of Po in the final energy consumption can be reduced, and energy saving can be achieved. You can

Incidentally, FIGS. 5 to 7 show the data of energy consumption, respectively, and display the measured values of the mill pulverization charge rotation power P [W, KW] with respect to the mill rotation speed [rpm], and FIG. Is a rotary centrifugal type ball crusher according to the present invention, FIG. 6 is a vibrating ball mill, and FIG. 7 is a ball mill.

[Advantages of the Invention] As described above, according to the horizontal swirling centrifugal ball mill type crushing method and the horizontal swirling centrifugal ball mill type crusher of the present invention, the crushing container is rolled along the inner wall of the swirling container. Since the interior of the crushing container accommodates the object to be crushed and the crushing medium and the slewing container is horizontally swung with a predetermined amplitude, the swirling container 2 can be reduced in amplitude and swirling motion. In addition to having the characteristic that the mechanical structure of the generating mechanism can be simplified, the centrifugal effect generated in the grinding medium is not the centrifugal effect due to the turning of the device, but the centrifugal effect due to the diameter of the turning container 2. By increasing the diameter of the container, it is possible to bring out the large centrifugal effect of the ball, and it has excellent characteristics such as a high crushing speed, and the practical effect after carrying out the present invention is Extremely large.

[Brief description of drawings]

FIG. 1 is an explanatory plan view showing the principle of a horizontal orbiting centrifugal ball mill type pulverizing method of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a schematic front sectional view of a horizontal orbiting centrifugal type ball mill type pulverizer. Four
FIG. 5 is a perspective view showing the appearance of the device, FIG. 5 is a graph showing the energy consumption of the orbiting centrifugal ball crusher according to the present invention, and FIGS. 6 and 7 are the energy consumption of the conventional device. It is a graph shown. DESCRIPTION OF SYMBOLS 1 ... Grinding container, 2 ... Revolving container 3 ... Ball (grinding medium), 12 ... Shaft 13 ... Motor, 14 ... Revolving base

Claims (2)

[Claims] 1. A crushing medium, which is provided in a cylindrical crushing container so as to be rollable along the inner wall thereof, is accommodated together with a material to be crushed,
While inscribing the crushing container on a cylindrical rolling surface having a diameter larger than the outer diameter of the crushing container so that the crushing container can roll freely, the rolling surface is horizontally swiveled to roll the crushing container along the rolling surface. A horizontal swirling centrifugal type in which the material to be ground is orbitally revolved, and the object to be ground contained in the grinding container is ground and finely ground between the inner peripheral surface of the grinding container and the grinding medium and / or between the grinding media by the revolution and rotation of the grinding container. Ball mill type crushing method. 2. A cylindrical crushing container that accommodates a material to be crushed and a crushing medium that is provided so as to be rollable along an inner wall so that the crushing medium can be charged and discharged, and a cylindrical crusher having a diameter larger than the outer diameter of the crushing container. A horizontal swirling centrifugal ball mill type crusher comprising a swirling container having an inner diameter and a swirling circular motion generating mechanism for revolving the swirling container along a circular orbit.