JPS60147253A - Cone crusher - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a type of crusher for crushing rocks, iron ore, etc. into desired sizes in stone crushing plants, mines, steel mills, etc. - Durability of a 1L cone crusher Concerning improvements to improve performance.

[Prior art] - The crusher has a counterbalanced mantle (2) set inside a white concave (1) as shown in Figure 1.
) rotates eccentrically to crush the raw material (4) into a uniform size with a constant gap in the crushing chamber (3) formed by the crushing surfaces of the concave and mantle, and the degree of crushing of the raw material Depending on the situation, there are types such as coarse crushing, medium crushing, and fine crushing.

Usually, the material of the concape and mantle of a cone crusher is 14% Mn, an austenitic system that can withstand heavy impact wear.
Steel, JIS ScMnHI type 1, is often used.

However, the wear of cone crushers belongs to medium to low impact wear rather than heavy impact wear, and is rather subject to cutting and gouging wear. Therefore, work hardening occurs in the 14.4Mn steel due to the impact of the pulverized raw material, but the work hardened surface is subjected to cutting and gouging wear due to the corners of the raw material, and is removed, making it impossible to exert the work hardening effect and prematurely. has been experienced to wear out.

For this reason, in order to extend the service life of cone crushers, conventional techniques have been used, such as welding hardened metal (5) with high wear resistance onto the crushed surfaces of the concave and mantle, or pouring molten metal through a mold after crushing. Therefore, methods of welding and coating have been attempted.

However, in a cone crusher, large-sized raw materials are fed into the upper entrance between the concape and the mantle, and as they go downwards, the raw material (4) is crushed on the crushing surface and becomes smaller in size, and then the raw material (4) is crushed at the bottom of the concape and the mantle's crushing surface. is discharged from the exit.

1; l: According to the inventor's experiments, the progress of wear generally progresses from the upper part of the concave and mantle downwards, and it hardly occurs at the hem of the concave and mantle. Since it does not contribute to crushing, this part remains without much wear, and the crushing chamber (3) becomes as shown in Figure 2 (P).
Botokoro 1. This makes it difficult for the crushed raw material to be discharged.

Particularly during operation, the mantle moves upward as the fracture surface wears, so if welded hardened metal (51) remains at the hem of the mantle, it will conversely wear the fracture surface of the concape even faster. As a result, wear phenomena like ``Botokoro 9.'' are accelerated.

If you continue to supply raw materials even after such a situation occurs, it will be difficult for the crushed raw materials to be discharged, resulting in a choked state, and the raw materials being crushed will hop up in the crushing chamber, and finally the spring of the safety valve will release. The mantle automatically moves downward, and the crushed raw materials in a choked state and the input raw materials are discharged without being crushed. Even though the remaining thickness remains without sufficient wear, it is replaced with a new one.

Purpose of the Invention Disposal in the above state is uneconomical since both the concape and the r-mantle still maintain almost the same base material thickness.The purpose of the present invention is to solve these problems and make it economical. The main purpose of the cone crusher is to extend the useful life of the mantle.

Structure of the invention: 1. The inventor of the present invention attempted to gas cut the protruding lower end of the hem of the cone crusher, which had been worn out, as shown by the broken line in No. 61. As a result, it became easier to discharge the crushed materials, and the cone crusher was able to use its power more easily. Became.

The present invention has been made based on the findings described in Section 11.
it 1. ! The technical gist of the method is to either construct it with a metal that has poor front rod properties, or to make the lower part of the concave and the bottom part of the fractured surface of the mantle a dust cone crack.

FIGS. 3 to 51 show schematic cross-sectional views of a mantle (A) and a conocape (B) in which the present invention is implemented.

The one in Figure 3 is a mantleke), and for each concave fil, weld the hardened metal (5) with high wear resistance to the 14-inch Mn steel base material that makes up the fracture surface, leaving a width of 1 at the base. The desired surface is ground or formed into a concave shape during casting, and a hardened metal (5), such as a high chromium cast iron alloy, is welded to this part by welding or casting, and the base part eN] This is an example in which the original base material of 14% Mn steel remains and the fracture surface is constructed accordingly.

The one in Figure 4 is a mantle 6) and a concave (b), with a base material of 14ZMn steel constituting the fracture surface left with a skirt width e as the hardened metal (5) with high wear resistance. High chromium cast iron alloy with appropriate thickness, e.g. 12mm or 1mm
．． Welded to a thickness of 37 ML, the width of the hem is a mantle, and a welding alloy or mild steel or Al5I308 equivalent to the 1.4% Mn steel that made up the original fracture surface of the concape.
．． 316, 309°16%Mn-16%Cr, i
This is an example in which a welding filler such as 8%Cr 8%Ni-61Mn equivalent stainless steel is used to fill the welding material.

Also, the ones in Figure 5 are mantle (a) and conocape (b).
As in the example shown in Fig. 4 above, a hardened metal (5) with high abrasion resistance is welded to each of the hem portions, leaving l width of the hem portion. This is an example of leaving the money without paying.

In order to ensure smooth discharge of the crushed raw material without reducing the crushing efficiency of the cone crusher and to effectively consume the metal on the crushing surface to the end, the dimensions of the hem of the cone crusher and mantle vary depending on the size of the crusher. However, according to the experience of the present inventor, it is roughly as shown in the table below.

Table j Effects of Implementation The present inventor compared a conventional example and a cone crusher implementing the present invention to confirm the effects of the present invention.

The results are described below.

The size of the cone crusher used is 60 inches.
The crushed rock is rhyolite, which contains about 80% silica, with a maximum of 150% silica.
Those with a size of 7 ML or less were crushed.

Conventional concapes and mantles were made of 14% Mnt14 and did not have hardened metal (5) welded to them.\The service life was approximately 150,000 tons of production tonnage, and replacement was required. Next, for the same type of cone crusher as above, welded metal welding using 25sTIC-0 (trade name) wire as hardened metal (5) with high durability was applied to the entire crushing surface of the concape and mantle. The thickness is 37 skin, and the total thickness is 12 by welding 4 layers.
mm. The composition of the 258TIC-0 wire is C
:2゜0φ.

Mn: 1.5%, Si: 003%, Cr near%,
Ti: 5%, Mo: 1°4%, and the metal welding conditions were as follows.

Metal welding conditions Welding current: 350-4.0 (I A Welding voltage: 28-30V Welding speed: 65c''/1n Wire''' explosion Tee 7 x 1745'''''' 7 The cone crusher using the concave and mantle described above crushes After production of approximately 170,000 tons was started, the crushing efficiency suddenly deteriorated, and the crushed rock in the crushing chamber hopped up, worsening the discharge, so the crushing was stopped during medium + J-, L, concave, and the mantle was removed to check the wear condition. Upon inspection, it was found to be worn in the shape of a bag (Figure 2).

In other words, the wear condition of Concape (1) was that a hardened metal bead (5') remained at the hem. 40M from the lower end of the skirt shown in the same figure (b), probably due to the location of the crushed rock input.
Wear depth h) according to each circumferential position at position a
As shown in the table below, uneven wear occurred, and there were some areas where the hardened metal layer had already disappeared. In areas with little uneven wear, only one hardened metal layer has disappeared, and in areas with large uneven wear, the base material of the concave is 4 to 5 mm. The hardened metal layer bead (5') has a width of about 3 as shown in Figure 2 (a).
It remains unworn over 0mm and is approximately 8mm from the bottom edge of the hem.
The depth of wear at the 0ynm position varies as shown in the table below depending on the circumferential position shown in FIG.

However, it seemed uneconomical to dispose of both the mantle and concape at this time, as the lumber still retained much of its original thickness.

Finally, the present invention was carried out on a cone crusher of the same type as described above. In other words, for the concave and mantle, leave a width of 40 mm (fe) from the lower end of the hem, and scrape off about 12 mm in depth as shown in Figure 3 (e) and (b).
58TIC-0 wire was used to embed the metal under the same welding conditions as in the above example (formed flush with the /1 part. This method did not reduce the crushing efficiency during the crushing process, and also ensured that the crushed material could not be discharged. The process went smoothly, and the crushing surface was fully used to about 2/3 of its original wall thickness as designed.At that point, the production tonnage reached about 320,000 tons, which was about 2 times longer than the conventional service life.
゜We were able to achieve 1x.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of the main part showing the operation of the cone crusher. Figure 2 (a) is a partial vertical cross-sectional view showing the wear condition of the concape and mantle of the cone crusher; ) shows the circumferential wear measurement location at position b of the manotle. FIG. 3 is a schematic cross-sectional view showing an example of an embodiment of the present invention, in which (a) shows a mantle;
(b) is a concape. FIG. 71 is a schematic cross-sectional view showing another example of the embodiment of the present invention, in which ridge) is a mantle and (b) is a concave. FIG. 5 is a schematic cross-sectional view showing still another example of the embodiment of the present invention, in which (a) is a mantle and (b) is a concave. 1: Concape, 2: Mantle, 3: Crushing chamber, 4: Raw energy, 5: Hardened metal Applicant: ING Shoji Co., Ltd.

Claims (3)

[Claims] (1) A cone crusher characterized in that the hem of the crushing surface of the concape oyohi mantle of the cone crusher is made of a metal whose wear resistance is inferior to that of the metal constituting the remaining crushing surface. (2) The bottom part of the cone crusher's concape and crushing surface of the mantle is made into a low step part.
cone crusher. (3) A hardened metal with high wear resistance is welded to the remaining portion of the crushing surface of the cone crusher and the crushing surface of the mantle, excluding an appropriate width. cone crusher.