JPH04910Y2 - - Google Patents

Description

[Detailed explanation of the idea]

a. Industrial Application Field The present invention relates to a cement clinker crushing device. b. Prior Art As a conventional cement clinker crushing device, the devices shown in FIGS. 3 to 6 are known. That is, a cake-like semi-finished product obtained by pressurizing and crushing with a roll press mill 101,
directly fed into the separator 102 and crushed there,
There is a classification system (device shown in Figure 3). Also, roll press mill 101 and separator 1
02, a screen 103 is disposed between the screen 103, the cake-like semi-finished product is crushed, and at the same time, coarse particles and fine particles are separated, and the coarse particles are conveyed to the roll press mill 101 again. There is a device (the device shown in Figure 4). However, in the above-mentioned apparatus, the crushing force was weak, and the fine powder in the cake-like semi-finished product produced by the roll press mill 101 could not be loosened. Therefore, an apparatus in which a ball mill 104 is disposed between a roll press mill 101 and a separator 102 (the apparatus shown in FIGS. 5 and 6) has been proposed. c. Problems to be solved by the invention However, these conventional improved devices also had the following problems. That is, in general, in order to perform pulverization efficiently, it is necessary to consider a pulverization method that is suitable for the size of the particles. For example, in the ball milling method, it is necessary to determine the size of the balls, the composition of the balls, the filling amount of the balls, and the shape of the ball mill liner in accordance with the particle size of the material to be ground. Therefore, fine particles of 100 μm or less and fine particles of 2000 μm formed by crushing with the roll press mill 101
In an apparatus (the apparatus shown in FIG. 5) in which a semi-finished product in which the above-mentioned coarse particles and intermediate particles thereof are compacted into a cake shape is directly conveyed to the ball mill 104 and pulverized (the apparatus shown in FIG. 5), the above-mentioned particle size is Ball mill 1
The pulverization efficiency of 04 was poor. Moreover, this also resulted in the re-pulverization of fine particles that could be recovered as a product in the ball mill 104, resulting in energy loss. In order to solve the above problem, roll press mill 1
Screen 10 between 01 and ball mill 104
3 (the device shown in FIG. 6).
According to such a device, it is possible to separate coarse particles and fine particles to some extent, and it is possible to determine the ball size, ball composition, ball filling amount, ball mill liner shape, etc. that match the particle diameter, and the ball mill 104 can be expected to improve the grinding efficiency. However, the above-described classification using the screen 103 could not be sufficiently effective due to clogging or abrasion of the screen 103, and there were also problems such as generation of dust. It is known that cake-like semi-finished products that are directly crushed and finally pulverized using a hammer mill or the like without using a ball mill have a significantly wide particle size distribution and are of inferior quality. The present invention has been devised to effectively solve the above-mentioned problems, and its purpose is to provide a cement clinker crushing device with high crushing efficiency. d Means for Solving the Problem In order to solve the above-mentioned problems, the gist of the present invention is to provide a roll press mill and a ball mill for crushing and pulverizing the cake-like semi-finished product crushed by the roll press mill. and an air separator for classifying semi-finished products crushed and crushed by the ball mill, in which a crusher and an air separator are sequentially installed between the roll press mill and the ball mill. A cement clinker pulverizing apparatus is characterized in that the fine particles classified by the air separator are recovered as a product and the coarse particles are conveyed to the ball mill. e Examples Examples of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a conceptual diagram showing an embodiment of a cement clinker crushing device according to the present invention. In the figure, 1 is a feeder that supplies cement clinker, 2 is a roll press mill that crushes the supplied cement clinker between two rotating rolls, and 3 is a cake-like semi-finished product that is crushed by the roll press mill 2. It is a crusher that disintegrates. This crusher 3
may be any crusher such as a cone crusher, a hammer crusher, or a jaw crusher. 4 is an air separator that classifies the semi-finished products crushed by the crusher 3 into fine particles and coarse particles; 5 is the coarse particles classified by the air separator 4 and the coarse particles classified by the air separator 6, which will be described later. , is a ball mill for grinding. 6 is a second air separator that classifies the semi-finished product pulverized by the ball mill into fine particles and coarse particles. The operation of the device of this embodiment is as follows. The cake-like semi-finished product crushed by the roll press mill 2 is first sent to a crusher 3 and crushed. At this time, the crusher 3 has a crushing mechanism that destroys or crushes the cake-like semi-finished product by its impact force and shearing force, so it acts particularly effectively on crushing the cake-like semi-finished product. The semi-finished product crushed by the crusher 3 is sent to an air separator 4, where it is classified into fine particles and coarse particles, the fine particles are recovered as a product, and the coarse particles are sent to a ball mill 5. Thereby, even fine particles that can be used as products are not re-pulverized by the ball mill 5, and energy efficiency can be improved. Further, the particle size of the semi-finished product sent to the ball mill 5 is made uniform, and the size and composition of the balls that match the particle size can be determined, resulting in good pulverization efficiency. The semi-finished product pulverized by the ball mill 5 is classified by the second air separator 6, coarse particles are returned to the ball mill 5 and pulverized, and fine particles are recovered as a product. FIG. 2 is a conceptual diagram showing another embodiment of the present invention, in which, unlike the previous embodiment, two ball mills 5 are arranged. According to this embodiment, the semi-finished products crushed by the crusher 3 are classified into fine particles, intermediate range particles, and coarse particles by the air separator 4, and the fine particles are recovered as products, and the intermediate range particles and coarse particles are classified into fine particles, intermediate range particles, and coarse particles. are fed into a ball mill 5 ₁ and a ball mill 5 ₂ respectively. With this configuration, ball mills 5 ₁ , 5 ₂
The particle size of semi-finished products sent to the factory becomes more uniform,
Therefore, the ball size, ball composition, and ball filling amount can be adjusted to match the particle diameter, and the grinding efficiency of the ball mill 5 can be improved. Table 1 shows the results of comparing the experimental values conducted using the apparatus of the second embodiment described above with the conventional apparatus (the apparatus shown in FIG. 6).

[Table] From the table above, an approximately 6% improvement can be seen in the power consumption of the device. It should be noted that the crusher can be selected in accordance with the balance between the ball mill and the separator. f. Effects of the invention Since the present invention is a cement clinker crushing device configured as described above, even fine particles that can be recovered into products do not need to be re-pulverized with a ball mill.
Energy efficiency can be improved. In addition, since semi-finished products are classified using an air separator before being fed into the ball mill, it is possible to determine the ball size, ball composition, etc. that match the particle size, which improves the grinding efficiency of the ball mill. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing one embodiment of a cement clinker crushing device according to the present invention, and FIG. 2 is a conceptual diagram showing another embodiment. 3 to 6 are conceptual diagrams showing a conventional cement clinker crushing device. 1...Feeder, 2...Roll press mill, 3
... Crusher, 4... First air separator, 5... Ball mill, 6... Second air separator.

Claims (1)

[Scope of utility model registration request] A combination of a roll press mill, a ball mill for crushing and pulverizing the cake-like semi-finished product crushed by the roll press mill, and an air separator for classifying the semi-finished product crushed and crushed by the ball mill. In the cement clinker crusher, a crusher and an air separator are installed in sequence between the roll press mill and the ball mill, the fine particles classified by the air separator are collected as a product, and the coarse particles are sent to the ball mill. A cement clinker crushing device characterized in that it is configured to be conveyed.