JPH0321353A - Cone crusher for fine pulverization - Google Patents

Abstract

PURPOSE:To produce a product composed of fine particles having a good particle size and particle shape by keeping the acting surfaces of both crushing action parts of a mantle and a concave so as to always make the lengths thereof same even when both crushing action parts are abraded by long-time operation. CONSTITUTION:A mantle 1 and a concave 2 are equipped with raw ore conditioning parts 3, 4 and step parts 6, 6 corresponding to each other and further equipped with the crushing action parts 7, 8 continuing to said parts 5, 6. The part 5 composed of a conditioning surface 5a forming a cavity shape is provided to the lower end of the part 3 and, further, the part 7 almost parallel to the inclined surface of the part 3 is provided to the part 3. A part 6 composed of a conditioning surface 6a contracting the cross-sectional area of the part 4 is mounted to the lower end of the part 4 of the concave 2. Further, the parts 7, 8 composed of the acting parts 9, 10 almost parallel to the part 7 of the mantle 1 are provided so as to correspond to each other and the conditioning surfaces 5a, 6a of the step parts 5, 6 are respectively formed in parallel to the lower end surfaces 7a, 8a of the parts 7, 8.

Description

[Detailed Description of the Invention] [Field of Application in Industry] The present invention relates to a cone crusher, and particularly to a cone crusher. The present invention relates to a crushing cone crusher useful for crushing raw stone such as ore to a desired particle size in order to obtain fine particles.

[Prior Art] Conventionally, as a cone crusher for crushing, a mantle and a cone cave have a raw stone adjusting portion and a stepped portion that correspond to each other, and a crushing portion that is continuous with the stepped portion, and a crushed portion. The flow of the material to be processed is adjusted and maintained by the stepped portion so that the raw ore adjustment chamber formed by the ore adjustment section has a predetermined storage height, and the material flows into the crushing action section in a uniformly filled state. There is a known method in which the product passes through a predetermined crushing gap, undergoes a crushing action, and is discharged as a product consisting of fine particles (Japanese Patent Publication No. 54-4773). In this type of crushing cone crusher having a mantle and a cone cape, when the working surfaces of both the mantle and the cone cave become worn out due to long-term operation of the crushing cone crusher, the crushing gap is removed. Since the particle size of the product changes and fine particles cannot be obtained, the mantle can be moved in the axial direction to readjust the required crushing gap. [BJ that invention tries to solve! ! ] However, the above-mentioned conventional configuration is effective in that when the working surfaces of both the mantle and the cone cave become worn, the mantle can be moved in the axial direction to readjust the required crushing gap. However, due to the movement of the mantle in the axial direction, the positions of the working surfaces of the crushing parts of the mantle and cone cave change, and a part of the working surfaces no longer participates in the crushing action, so the material to be processed is This is undesirable because it passes through the crushing action part in a short passage time, which may reduce the crushing performance. Furthermore, if the working surface is worn in a curved state, the object to be treated will be subjected to irregular crushing action, which will have an unfavorable effect on the particle size and shape of the product made of fine particles. The present invention has been made in order to solve the above-mentioned problems, and the purpose is that the working surfaces of both the mantle and the cone curve are worn out due to long-term operation of the crushing cone crusher. Even when the crushing gap is readjusted to the required crushing gap by moving the The purpose of the present invention is to obtain a cone crusher for crushing having a mantle and a cone cave, which can produce a product consisting of fine particles with good particle size and shape under appropriate crushing conditions. [Means for Solving Problem VI] According to the present invention, there is provided a cone crusher in which a mantle and a cone cave have a raw stone adjustment portion and a stepped portion that correspond to each other, and a crushing portion that is continuous with the stepped portion. , the lower end of the raw ore adjustment part of the mantle has a stepped part consisting of a concave-shaped adjustment surface, and a crushing action part that is approximately parallel to the inclined surface of the ore adjustment part is provided, and the ore adjustment part of the concave At the lower end of the part, there is provided a stepped part consisting of an adjustment surface that reduces the cross-sectional area of the rough ore adjustment part, and further a crushing action part consisting of an action surface substantially parallel to the crushing action part of the mantle is provided correspondingly. , the adjustment surfaces of both the step portions of the mantle and the cone cave are formed parallel to the lower end surfaces of both crushing action portions, and the adjustment surfaces of the step portion of the mantle are parallel to the action surfaces of the crushing action portion of the mantle. The adjusting surface of the stepped portion of the cone cave is formed at an obtuse angle with respect to the working surface of the crushing portion of the cone cave.

[Function] With the above configuration, the lengths of the working surfaces of both the crushing working parts of the mantle and cone cave can be maintained at all times to be the same, and the material to be processed is crushed under appropriate crushing conditions. It is possible to produce products consisting of fine particles with good particle size and shape. [Example] An example of the present invention will be described below with reference to the drawings. In Figures 1 and 2, 1 represents the mantle of the cone crusher for crushing, and 2 represents the cone cave. The mantle 1 has a conical shape and is fixed to the main shaft via a mantle holder, and the cone cave 2 represents the mantle. 1 is lined with a casing on the outside. A material to be processed is supplied between the mantle 1 and the cone cave 2, and is crushed under the eccentric rotation of the mantle 1 mainly by compressive force to obtain a product. The shapes of the mantle 1 and the corncave 2 are special so that a product consisting of fine particles can be obtained. The mantle 1 is provided with a raw ore adjustment part 3 in the part where the material to be processed is supplied, and the outer diameter increases toward the lower end, and the lower end of the raw ore adjustment part 3 is provided with a recessed adjustment surface 5a.
Furthermore, a crushing action part 7 is provided continuously to the step part 5, so that the action surface 9 of the crushing action part 7 is approximately parallel to the inclined surface of the rough ore adjustment part 3. is being used.

The cone cave 2 corresponds to the mantle 1, and the cone cave 2 is provided with a raw ore adjustment part 4 in the part where the material to be processed is supplied, and at the lower end of the ore adjustment part 4, there is a stepped part consisting of an inwardly sloping adjustment surface 6a. 6, and further, a crushing portion 8 is provided continuously to the step portion 6, and a working surface 10 of the crushing portion 8 is connected to the crushing portion 7 of the mantle 1.
It is made to be almost parallel to the action surface 9 of Thus, the rough stone adjustment chamber 11 is provided between the rough stone adjusting portions 3.4 of the mantle 1 and the cone cave 2;
A suppression chamber 12 is continuously formed between the two stepped portions 5, 6, and a crushing chamber 13 is further formed between the two crushing portions 7.8. The stepped portion 6 is arranged such that the cross-sectional area is reduced from the lower end of the rough stone adjustment chamber 11 to the lower end of the suppression chamber 12.
It has an adjustment surface 6a. The adjustment surface 5a of the stepped portion 5 of the mantle 1 is formed at an angle α with the action surface 9 of the crushing action portion 7 of the mantle 1, and α is optimally in the range of 30 to 70°. This adjustment surface 5a is formed so that it is substantially parallel to the lower end surface 7a of the crushing portion 7. The adjustment surface 6a of the stepped portion 6 of the cone cave 2 is formed with an angle β between it and the action surface 10 of the crushing action portion 8 of the cone cave 2, and β is optimally in the range of 90 to 120@. This adjustment surface 6a is the lower end surface 8a of the crushing action portion 8.
are formed so that they are almost parallel. Zarasha, both crushing active parts of Mantle 1 and Corn Cave 2 7.8
The lengths Lm and Lc of both working surfaces 9.10 are made to be approximately the same. Next, the effect will be explained. The material to be processed is supplied to the raw ore adjustment chamber 11 of the pulverizing cone crusher by a supply device (not shown) so that a desired storage height is obtained. Raw stone adjustment room! ! Under the eccentric rotation of the mantle 1, the materials to be processed are changed from an irregular coordination state to a regularized state, and the material to be processed is changed into a regular state in the rough adjustment chamber 11 while increasing the filling state of the materials to be processed. Move toward the bottom edge. At this time, the flow of the material to be processed is at both step portions 5.
In the suppression chamber 12 between the mantle 1 and the cone cave 2, the regulation surfaces 5a and 6a further ensure regularization of the coordination state of the material to be processed and an increase in the packing density. The material to be processed passes through the crushing space G from the upper end to the lower end of the crushing chamber 13, which consists of the working parts 7 and 8, with a sufficient passage time and a high packing density. The eccentric rotation of step 1 causes particles to be crushed between them and the working surface 9, 10, so that the object to be processed is reliably crushed by the compressive force of the particles from multiple directions, and the particles are crushed between particles. A product made of IIlm containing a large amount of particles with a particle size of G or less can be obtained, and the frequency of crushing collisions between particles can also be increased, thereby improving the particle shape of the product. In FIG. 2(a), the material to be processed from the suppression chamber 12 passes through the crushing chamber 13, which is composed of both crushing sections 7.8, under a crushing stage G, and a product consisting of fine particles is produced. This shows the state in which In FIG. 2(b), the working surfaces 9, 10 of both crushing working parts 7.8 are worn out due to long-time operation of the cone crusher for crushing, and the working surfaces 9'10' become worn, resulting in a til between crushing.
l G is expanded to G1, and the action surface 9'
The actual length of is reduced to Ltse, and the length L of the working surface 10'
c, resulting in a decrease in crushing performance.

Therefore, as shown in Fig. 2(C), when the mantle 1 is moved in the axial direction and readjusted to the required crushing gap G, the length of the both working surfaces 9' and 10' is the second. Figure (a
) The lengths Lm and Lc shown in the table can always be kept the same, and a product consisting of fine particles with good particle size and shape can be produced under appropriate crushing conditions. Figure 3 compares the action of a conventional cone crusher with that shown in Figure 2. FIG. 3(a) shows a state in which the material to be crushed from the suppression chamber 12A passes through the crushing action chamber 13A under the crushing gap G, and a product consisting of fine particles is produced. In FIG. 3(b), the working surface 9A and the working surface 9A'. 1 0A', and the crushing gap is also CI
A, and the action surface 9A' IO
The length of A' is different from Lc^ and Lme. In FIG. 3(c), the required crushing interval l! When readjusted to lG1, the lengths Lm and Lc as shown in Figure 2(c)
cannot be maintained always the same, and the working surface 9A'' and IO
Since there is a difference in the relative position of A'', it is not possible to obtain appropriate crushing conditions, and it is not possible to produce a fine product with good particle size and shape. [Effects of the Invention] As explained above, In the present invention, even if both the crushing parts of the mantle and the cone cape are worn out due to long-term operation,
The length of the working surfaces of both crushing parts can always be kept the same, and the workpiece is crushed under appropriate crushing conditions, resulting in fine-grained products with good particle size and shape. can be produced.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a cone crusher for pulverization showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of its operating state, and Fig. 3 is an explanatory diagram of the operating state of a conventional cone crusher for pulverization. be. 1... Mantle, 2... Corn cave 3.4... Raw stone adjustment part, 5.6... Step part 5
a, 6a...adjustment surface,

Claims (2)

[Claims] (1) In a cone crusher in which the mantle and the cone cave have a raw ore adjustment portion and a stepped portion that correspond to each other, and a crushing action portion that is continuous to the stepped portion, a concave shape is formed at the lower end of the ore adjustment portion of the mantle. A crushing portion is provided at the lower end of the cone cave to reduce the cross-sectional area of the rough ore adjustment portion. The adjustment surface of both the mantle and the cone cave has a step portion consisting of an adjustment surface that is parallel to the crushing portion of the mantle, and a corresponding crushing portion that is a working surface that is approximately parallel to the crushing portion of the mantle. A cone crusher for crushing particles, characterized in that the lower end surfaces of the working parts are formed parallel to each other. (2) The adjustment surface of the step part of the mantle is formed at an acute angle to the action surface of the crushing action part of the mantle, and the adjustment surface of the step part of the cone cave is formed at an obtuse angle to the action surface of the crushing action part of the cone cave. The cone crusher for crushing according to claim 1, characterized in that the cone crusher is formed.