JPH0646502Y2 - Ball mill flow controller - Google Patents

Description

[Detailed Description of the Invention] [Industrial technical field] The present invention is a ball mill used for crushing cement, etc. Regarding the device.

[Description of Prior Art and Its Deficiencies]

Conventionally, the flow control device of a ball mill is one that adjusts the length of the pumping plate installed in the diaphragm, or multiple scoops are installed in the diaphragm and the pumping angle of this scoop is changed to change the flow rate of the object to be ground. There are things that control the
issue). However, it is difficult to incorporate these devices into an existing diaphragm, and it is necessary to completely replace the diaphragm with these devices, which is extremely expensive. Furthermore, these flow rate control devices have to open the lid on the side of the fine crushing chamber of the mill and enter the inside of the mill for adjustment operation, which requires a lot of man and a long time to open the lid, and dust and high heat. Since the work in the mill to be exposed is unfavorable from the working environment, it is often the case that the work is actually carried out once and then adjusted, and thereafter the work is hardly adjusted. However, for example, the crushability and particle size distribution of cement clinker used in a mill often change, so it is necessary to make fine adjustments according to each situation. JP-B-53-7653 discloses a flow rate adjusting device that can be adjusted from the outside of the mill, but the structure is complicated and it has not been put to practical use, and the above-mentioned problems cannot be solved.

[The purpose and points of the invention]

The purpose of this invention is to solve the problem that the conventional flow rate control diaphragm is extremely expensive, the existing diaphragm cannot be used effectively, and that the workability must be adjusted in the mill during the adjustment. At that point, an opening / closing valve that can be driven from outside the mill is attached to the outlet of the existing diaphragm, and by opening / closing this valve,
The purpose is to control the amount of crushed material that flows from the coarse crushing chamber to the fine crushing chamber.

[Constitution of the device and its operation]

1 (A) and 1 (B) are sectional views of a diaphragm provided with the flow rate adjusting device according to the present invention, and FIGS. 2 (A) and 2 (B).
FIG. 3 is a cross-sectional view of a conventional diaphragm that is not equipped with a flow rate control device. In each of FIG. 1 and FIG. 2, FIG. (A) is a view as seen from the direction of the chain line in FIG. (B).
The diaphragm is used as a means for dividing a coarse crushing chamber and a fine crushing chamber in a ball mill used for crushing cement or the like, and a crushing chamber side partition plate 2 having a slit 5 for passing an object to be crushed. It is composed of a partition plate 3 on the fine crushing chamber side. Further, the crushed object storage chamber 4 formed by these partition plates is divided into a plurality of pieces by the pumping plate 7, and the crushed object flowing into the storage chamber 4 through the slits 5 is rotated by the mill. It has a function of being lifted above the axis of and being fed to the fine crushing chamber through the discharge port 6. In the conventional diaphragm having such a structure, the flow control device of the present invention penetrates the valve seat 10 having the opening and the cell 1 of the mill through the discharge port 6 of all or some of the reservoir chambers 4, A valve 8 that is joined to a leaning drive rod 9 supported by a pedestal 11 and a support 13 and that opens and closes an opening of a valve seat 10 is attached. The drive rod 9 is screwed to the base 11,
Since it has a tip and a square head 14, the screw can be loosened using a tool such as a spanner, and can be easily put in and taken out in the radial direction of the mill. When the drive rod 9 is pushed in the inner diameter direction of the mill, the valve 8 is opened, and the crushed material in the reservoir chamber 4 is completely discharged. On the other hand, if the drive rod 9 is pulled out in the outer diameter direction of the mill, the valve 8 is closed and the crushed material is not discharged from the reservoir chamber 4. The flow rate control device is usually installed in 2 to 12 sets according to the number of divisions of the storage chamber 4 divided by the pumping plate 7, and depending on the number of opening and closing of the valve 8, the amount of the crushed substance flowing from the coarse crushing chamber to the fine crushing chamber. Can be controlled.

[Effect of device]

The effects and application fields obtained by the present invention are listed as follows: Since the existing partition can be used, the device of the present invention can be manufactured and installed at an extremely low cost.

When adjusting the flow rate controller, the work of opening the lid of the mill and the work inside the mill were eliminated, so the working time was significantly shortened compared to the conventional flow rate controller. Moreover, it has become possible to immediately take countermeasures against various disturbances such as changes in the properties of the crushed object.

The grinding efficiency is further improved by measuring the grinding noise of the ball mill during operation and controlling the flow rate control device so that this is a certain value. In the case of a cement mill, the power consumption per crushed amount can be improved by about 1 to 3 kwh / t.

By connecting an electric motor or hydraulic device to the drive rod of the flow rate controller according to the present invention and fixing it to the mill cell,
By means of a slip ring or the like, the valve of the flow rate control device can be automatically opened and closed even during mill operation.

INDUSTRIAL APPLICABILITY The flow rate adjusting device according to the present invention can be applied to a ball mill used for pulverizing not only cement but also many kinds of raw materials, fuels and the like.

[Brief description of drawings]

1 (A) and 1 (B) are cross-sectional views of a diaphragm of a ball mill equipped with the flow rate control device of the present invention, and FIGS. 2 (A) and 2 (B) are conventional diaphragms without flow rate control device. FIG. 1 ... Mill cell, 2 ... Coarse crushing chamber side partition plate, 3 ... Fine crushing chamber side partition plate, 4 ... Reservoir chamber, 5 ... Slit, 6 ... Discharge port, 7 ... Pumping plate, 8 …… Valve, 9 …… Drive rod, 10 …… Valve seat, 11 …… Stand, 12 …… Grand box, 13 …… Support, 14 …… Square head.

Claims (1)

[Scope of utility model registration request] 1. A crushing chamber side partition plate having a slit and a fine crushing chamber side partition plate having a central discharge opening form a chamber for storing the material to be crushed, which is pumped up for discharging the material to be crushed. In a diaphragm of a ball mill which is divided into a plurality of sections by a plate, an openable and closable valve for adjusting the discharge amount of the crushed material is provided in the section of the diaphragm, and the valve is joined to the valve from the outside of the mill. And a drive rod that allows opening and closing of the ball.