JPH0576787A - Crushing equipment - Google Patents

Abstract

PURPOSE:To reduce the consumption unit of motive power and to enhance crushing capacity by forming the respective notches having the specified length and an angle in the respective inlet parts for a crushing chamber of a concave liner and a mantle liner which compose the crushing chamber of a cone crusher. CONSTITUTION:A cone crusher constitutes a crushing equipment together with a jaw crusher or the like. A mantle liner 8 is rotated and vertically moved according to the eccentrically rotating movement of a mantle 5. A raw material is crushed in a crushing chamber 7 composed by both the mantle liner 8 and a concave liner 9 fitted to a concave 6. In this case, the respective notches are formed to the respective inlet parts of the crushing chamber 7 in the liners 8, 9. In the concave liner 9, the original length B of a crushing zone is shortened to length A and also an enlarged oblique angle alpha is set which is larger than the original oblique angle alpha1 by 5-70 degrees. On the other hand, in the mantle liner 8, length C is set in the range within (0.1-0.9)D for original length D.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing facility for producing aggregate for a raw concrete or road and fine aggregate, and more particularly to a crushing facility with a large crushing ratio.

[0002]

2. Description of the Related Art Conventionally, crushing raw materials of 150 mm or less,
To produce aggregates for ready-mixed concrete, road aggregates and finer aggregates smaller than that, for example, one such as jaw crusher is used.
The crushed product of 150 mm or less obtained from the secondary crusher was adjusted with a vibrating screen to a size of 30 to 150 mm, and as shown in FIG. 6, it was stored in an intermediate bottle and then cut out into a secondary crusher, a cone crusher. It is supplied and crushed, and is further crushed by an impact crusher and sent to the sieving line. In addition to 40 mm under, 40 to 20 mm, 20
Various products having a size of 13 mm, 13-5 mm, 5 mm or less were obtained.

[0003]

However, such conventional crushing equipment requires not only the jaw crusher as the primary crusher but also secondary to tertiary crushers such as a cone crusher and an impact crusher, Power consumption (power required to process 1 ton of product) is 1.9k
Wh / t is high, and when the liner of the crusher wears, the crushing capacity and the quality of the product deteriorate, and there is a problem that the capacity decreases by 30 to 40% from one month before the liner replacement compared to when the liner is new. It was

Therefore, in order to solve the above-mentioned problems, a cone crusher having a large crushing ratio which can be processed at one time by substituting the functions of the above-mentioned cone crusher and impact crusher is desired, but in the conventional cone crusher, , For example, as shown in FIG. 7, the crushing chamber (cone cabel liner inclination angle α ₁ = 0 ° to 40 °, mantle liner inclination angle α, which seems to perform the most preferable crushing action)
₂ = 0 ° -40 °, length of crushing zone B and D = 40
The design was carried out based on a pair of upper and lower liner shapes that form 0 mm or less), that is, a combination of the shape of the cone cabling 9 and the shape of the mantle liner 8. Therefore, the maximum size of the raw material that can be put into the corn crusher is the cone cabeler inclination angle α ₁ , the mantle liner inclination angle α ₂ ,
It is determined by the lengths B and D of the crushing zone,
The maximum bite size when set on the normally closed side was about 35 mm.

Therefore, when the raw material size becomes larger than the reference value, which is much larger than 35 mm, the raw material is not caught at the entrance of the crushing zone, it just rolls and stays, and the entrance is clogged to the crushing zone. There was an obstacle that the raw material going to the factory decreased sharply and the crushing capacity dropped sharply.

[0006]

In order to solve the above problems, in the crushing equipment of the present invention, a jaw crusher, a primary vibrating screen for sieving the crushed products of the jaw crusher, and a cone crusher, A crushing facility equipped with at least one or more secondary vibrating screens for sieving the crushed products of the corn crusher, wherein the corn cabeler and the mantle liner forming the crushing chamber of the corn crusher have a mantle. The inclination angle is 20 ° to 65 °, the cone cabeliner inclination angle and the mantle liner inclination angle are 5 ° to 40 °, the length of the crushing zone is 400 mm or less, and the corn cave inclination angle is provided at the entrance of the crushing zone of the cone cabling. The length of the remaining crushing zone having an inclination angle larger by 5 ° to 70 ° is 0.1 to 0.9 of the original length of the crushing zone. A notch is formed, and the length of the remaining crushing zone is substantially horizontal at the entrance of the crushing zone of the mantle liner, and the length of the remaining crushing zone is 0.1 to 0.
A notch having a number of 9 was formed.

[0007]

Since the liner of the cone crusher in the crushing equipment of the present invention is constructed as described above, the size of the bite material at the entrance of the crushing zone can be increased by 4 to 4.5 times as compared with the conventional one. Therefore, the raw material of 150 mm or less, which is a crushed product of the jaw crusher, can be sufficiently processed, and therefore, a large amount of raw material is smoothly retained in the crushing zone without stagnation at the inlet of the crushing zone and is crushed. It is possible to avoid a drop in ability due to a large lump. Therefore, desired aggregates and fine aggregates can be obtained even if the third crusher is omitted.

[0008]

Embodiments of the crushing equipment of the present invention will be described below in detail with reference to the drawings. 1 to 5 relate to an embodiment of the present invention, FIG. 1 is an overall flow sheet, FIG. 2 is a sectional perspective view of a cone crusher, FIG. 3 is an enlarged vertical sectional view of a main portion of a cone crusher liner, and FIG. 4 is a cone crusher. FIG. 5 is a particle size distribution curve diagram of a raw material and a product, which is an enlarged vertical sectional view of an essential part showing another embodiment of the liner.

In the figure, 100 is a raw material hopper, and 200
Is a plate feeder, 300 is a jaw crusher as a primary crusher, 400 is a primary vibrating screen, 500 is an intermediate bin, 600 is a vibrating feeder, 700 is a cone crusher, 800 is a secondary vibrating screen, and 900 is a tertiary vibrating screen. Is.
The numbers attached to each vibrating screen and product in FIG. 1 indicate the mesh size and product size, respectively. Also, the symbols P, Q,
R and S indicate switching shoots.

The cone crusher 700 has a structure shown in FIGS. 2 to 3, in which 1 is a counter shaft, 2 is a bevel gear, 3 is an eccentric, 4 is a main shaft, 5 is a mantle, 6 is a cone cave, 7 is a crushing chamber, 8 is a mantle liner, and 9 is a cone cabling. 8a is the upper mantle liner (aka lower liner
It is also called an extension). The operation of the cone crusher 700 of the present invention will be described. When the counter shaft 1 is driven by a V-belt by an electric motor (not shown), the eccentric 3 is rotationally driven via the bevel gear 2, and the eccentric 3 is moved in a slightly oblique direction (1 The main shaft 4, which is inserted from about 0 ° to 3 °), rotates while performing eccentric movement. Therefore, the mantle 5 integrated with the main shaft 4 also performs eccentric rotary motion. With the rotation of the mantle 5, the mantle liner 8 mounted on the outer peripheral portion of the cone-shaped mantle 5 simultaneously rotates and moves up and down at the same time, and the lower surface of the cone cabe liner 9 mounted on the fixed cone cave 6 is rotated. The raw material is crushed in the crushing chamber 7 which is a space portion formed by. A pair of upper and lower liners, cone cone liner 9 and mantle liner 8 which come into contact with these raw materials and compress and crush the raw materials are made of wear-resistant materials, so that they can be replaced when the wear reaches the limit. It has a structure.

In the present invention, the cone cable liner 9
And the mantle liner 8 are each provided with a notch at the entrance of the crushing chamber 7. That is, as shown in FIG. 3, in the cone cabelliner 9, the length of the crushing zone originally having the length of B is shortened to the length of A, and a new inclination angle of the cone cabelliner α ₁ It is formed so as to have an enlarged cone cabel liner inclination angle α ₃ added by 5 ° to 70 °. The length of A is selected in the range of (0.1 to 0.9) B. On the other hand, for the mantle liner 8, the length C is selected in the range of (0.1 to 0.9) D with respect to the original length D, and the notch is provided substantially horizontally. With the above-mentioned structure, the entrance of the crushing chamber 7 has a length of 150 m.
It forms a flared part that can be bitten even when guiding a large lump of about m. The above-mentioned A dimension and C dimension are B dimension,
The smaller the dimension is, the larger the notch can be, which makes it easier to bite large lumps.
On the contrary, since the length of the crushing zone where the actual crushing action is performed becomes shorter, the crushing ability is reduced. Therefore, it is desirable to comprehensively judge and determine the mixing probability and the crushing ability of large lumps.

Compared with the conventional example of FIG. 7 (maximum biting diameter is 35 mm), A = 0.1B, C = 0.1D, α ₃ =
In the embodiment of FIG. 3 in which α ₁ + 40 ° is selected, the maximum biting diameter is 150 mm, which is 4.3 times that of the conventional example. In this case, there was almost no decrease in the crushing ability, or even at some times, it fell within 5-10%. This seems to be because a kind of preliminary crushing can be expected to some extent even in the newly expanded part. In FIG. 4, zigzag corrugations 8A and 9A are provided at the end of the crushing chamber inlet to further improve the biting of large lumps and reduce the crushing capacity due to the reduction of the crushing zone length. It was suppressed.

As described above, in the cone crusher liner of the present invention, a notch is provided at the entrance of the crushing chamber of the cone cabling and the mantle liner to form the flared portion, thereby forming a large lump. Since the biting is facilitated, it is possible to always bite sufficiently even with a material of 150 mm or less, which is a crushed product of the jaw crusher. In addition, temporarily a large lump of 150 mm or more, such as 200 mm or 2
Even those with a diameter of 50 mm can be accepted, and biting can be performed unless continuous feeding is performed for a long time.

The operation of the crushing equipment of the present invention incorporating the above-mentioned cone crusher 700 will be explained. As shown in FIG. 1, the raw material stored in the raw material hopper 100 is sequentially cut out by the plate feeder 200, and the jaws are cut. Primary crushing to less than 150 mm with crusher 300,
1 with a primary vibrating screen 400 having 80 mm and 30 mm
Products of 50 to 80 mm and products of 30 mm or less and 80 to 3
It is sorted into 0 mm products, and 80 to 30 mm alone or 150 to 30 m where 150 to 80 mm are merged.
The product of m is a cone crusher 70 as a secondary crusher.
It is thrown into 0 through the intermediate bin 500 and the vibration feeder 600 and crushed. A part of the crushed products of the corn crusher 700 is returned to the corn crusher 700, and the rest is sorted by a secondary vibrating sieve 800 (having 40 mm sieve and 20 mm sieve) downstream, 40 mm or less,
40 ~ 20mm product is obtained, and the third vibrating sieve (1
3 mm and 5 mm sieve mesh) to further produce a product of 13 to 5 mm, 5 mm or less. The reason for returning a part of the crushed products to the corn crusher 700 is to improve the grain shape of the product. It suppresses flat and slender products and improves the strength of concrete and ready-mixed concrete by discharging a lot of cubicle products. Is intended. The return amount may be about 25% of the raw material supply amount.

Thus, in the crushing equipment of the present invention,
A crusher such as an impact crusher can be used because it has a cone crusher that can bite even a large mass of primary crushed products such as a jaw crusher and can produce even ordinary raw concrete aggregate and fine aggregate. It can be omitted. as a result,
The unit power consumption has been reduced from 1.9kWh / t to 1.3kWh / t, and stable production and product quality can be maintained simply by changing the set value, even if the liner wears compared to the past.
The desired product can be intensively produced simply by changing the set value. In addition, the liner cost is about half that of the conventional one.

[0016]

As described above, since the crushing equipment of the present invention employs the cone crusher having a large crushing ratio and having the functions of the secondary crushing and the tertiary crushing, the power consumption is low and the liner is low. It is possible to prevent the deterioration of the crushing ability and the deterioration of the product quality due to the abrasion of the. Also, by changing the set value of the cone crusher, it is possible to easily obtain the desired size product.

[Brief description of drawings]

FIG. 1 is an overall flow sheet according to an embodiment of the present invention.

FIG. 2 is a sectional perspective view of a cone crusher showing one embodiment of the present invention.

FIG. 3 is an enlarged vertical cross-sectional view of a main part of a cone crusher liner showing one embodiment of the present invention.

FIG. 4 is an enlarged vertical sectional view of a main part of a cone crusher liner showing another embodiment of the present invention.

FIG. 5 is a particle size distribution curve diagram of raw materials and products in the crushing equipment of the present invention.

FIG. 6 is a flow sheet of a conventional crushing equipment.

FIG. 7 is an enlarged vertical sectional view of a main part of a conventional cone crusher liner.

[Explanation of symbols]

5 Mantle 6 Cone cave 7 Crushing chamber 8 Mantle liner 8a Upper mantle liner 8A Zigzag corrugated part 9 Cone cage liner 9A Zigzag corrugated part 100 Raw material hopper 200 Plate feeder 300 Jaw crusher 400 Primary vibrating sieve 500 Intermediate bin 600 Corn vibrating feeder 700 Secondary vibrating screen 900 Third vibrating screen A Crushing zone length B Crushing zone length C Crushing zone length D Crushing zone length P Switching chute Q Switching shoe R Switching chute S Switching chute θ Mantle tilt angle α ₁ Cone cave Liner tilt angle α ₂ Mantle liner tilt angle α ₃ Enlarged cone cabling angle

Claims (1)

[Claims] 1. A jaw crusher, a primary vibrating screen for sieving crushed products of the jaw crusher, a corn crusher, and at least one or more secondary vibrating screens for sieving crushed products of the corn crusher. In the crushing equipment provided, the cone cabeler and the mantle liner forming the crushing chamber of the cone crusher have a mantle inclination angle of 20 ° to 65 °, a cone kettle liner inclination angle and a mantle liner inclination angle of 5 °. ° -40 °, the length of the crushing zone is 400 mm or less, and the length of the remaining crushing zone having an inclination angle of 5 ° -70 ° larger than the inclination angle of the corn cave at the entrance of the crushing zone of the cone cabling And a notch having a length of the crushing zone of 0.1 to 0.9 is formed, and is substantially horizontal and remains at the inlet of the crushing zone of the mantle liner. A crushing facility in which the length of the crushing zone is 0.1 to 0.9 of the length of the original crushing zone.