What Are the Different Types of Aggregate Crushers?

The stone crusher can be divided into medical stone crusher and mining stone crusher according to the major categories. The mining stone crusher is suitable for crushing massive hard rock in principle. Its typical granite output size is less than 40mm, accounting for 90%. The machine can process materials with a side length of 100 to 500 mm.

1. The crusher can be roughly divided into two categories according to the way the crushing force acts:

(1) Crusher (2)

Mining crusher

The jaw crusher has the characteristics of large crushing ratio, uniform product granularity, simple structure, reliable work, easy maintenance, and economic operating costs. The PF-I series impact crusher can process materials with a side length of 100 to 500 mm.

1. Calculate the maximum particle size of the material before crushing by using the ratio of the maximum particle size of the material before crushing to the maximum particle size of the product after crushing;

2.The ratio of the effective width of the feed opening and the width of the discharge opening with a crusher i = 0.85B / b

In the formula, B --- feeder width of crusher; b --- crusher & lt; discharge outlet width; 0.85- ensure the effective width of the crusher to bite the material. The value of the discharge opening width, the coarse crusher takes the maximum discharge opening width

3. Use the average particle size to calculate i = Dcp / dcp where Dcpaverage diameter of the material before crushing; dcpaverage diameter of the material after crushing.

Due to the relatively harsh working conditions of the crusher, the torque or vibration experienced during the operation process will often cause failure of the transmission system. Commonly, there are wear in the bearing chamber and bearing position, wear of the shaft head and keyway, and the inner holes of the pulleys and couplings. Wear and so on. At the same time, due to the serious dust on the production site and poor lubrication conditions, the wear of the transmission parts will also be accelerated.

In addition, modern production enterprises have a high degree of production automation and continuity, and the requirements for smooth operation of equipment are also increasing. The crushing equipment is also developing in the direction of large-scale and high-volume production, and the difficulty of disassembly, transportation, and maintenance is also increasing. Without advanced maintenance methods, once the above equipment problems occur, they cannot be resolved quickly and effectively in the first place, and will inevitably Seriously affect the production of enterprises.

The solution to the wear of the hammer crusher bearing position: During the operation of the hammer crusher, due to various factors, the bearing position causes wear and tear. After the problem appears, repair and repair after welding or brush plating in accordance with traditional methods. However, the thermal stress generated by high temperature repair welding cannot be completely eliminated, and short shafts are prone to cause major accidents during operation. Brush plating is easily peeled off due to the thickness of the coating. Under the combined effect of various forces, it will still cause abrasion.

It has super strong adhesive force, excellent compressive strength and other comprehensive properties. It adopts Makahwa polymer composite material and can be repaired by mold without disassembly and machining. It can quickly and effectively repair the wear of the bearing position. Avoid the possibility of re-wear and greatly extend the service life of equipment components (including bearings).

The solution to the damage of the crusher shaft head keyway and the wear of the inner hole of the coupling:

During the long-term operation of the equipment, due to various factors, the shaft head and keyway are worn, and it is easy to bend or break; brush plating is limited by the thickness of the coating, and it is easy to peel off; and the above methods use metal to repair the metal and cannot be changed. The "hard-to-hard" cooperation relationship will still cause wear and tear under the combined effect of various forces.

Exploration of Cone Crusher

Cone crusher has the advantages of large crushing ratio, high efficiency, low energy consumption, uniform product particle size, and suitable for crushing hard ore, so it is widely favored by the ore dressing industry. However, the liner of the cone crusher is prone to severe wear due to frequent strong impacts. This will cause problems such as uneven product size, reduced production efficiency, and increased energy consumption. Therefore, replacement of the crusher liner is critical. High temperature zinc alloy casting or normal temperature high-grade cement mortar casting is usually used to replace new lining boards. During the production and maintenance process, problems such as loosening and difficulty in fixing the broken wall and the mortar wall often occur, which seriously affects the normal operation of the production. According to previous experience, it takes about 7 to 10 days to replace a cone crusher lining and pouring. The replacement cycle is too long, which seriously affects the normal production schedule. For this reason, relevant personnel have continued to explore and research and practice repeatedly to develop the cone. New technology for crusher liner filling-epoxy resin filler (crusher backing glue).

Filling the crusher liner with new technology

In view of the above-mentioned shortcomings of high-temperature zinc alloy casting and normal-temperature high-grade cement mortar casting, after careful analysis and research, boldly carry out reforms and innovations, aiming at simplicity, safety, environmental protection, moderate filling strength and hardness, easy flow during pouring, and easy disassembly. And other characteristics, explore a new way to replace high temperature zinc alloy and normal temperature high-grade cement mortar as the filler of cone crusher lining-room temperature epoxy resin filler (backing glue). Since the adoption of the new filling technology, good results have been achieved, which are mainly reflected in the following aspects:

1.Easy operation: Epoxy resin pouring technology only needs to clean the rust, oil, and dust of the contact surface of the bonded body, epoxy resin (solvent-free) E-51, low molecular 650 polyamide resin and other chemicals Add and stir according to a certain proportion and order of addition. After stirring well, it can be poured directly into the pouring hole, and it can be put into use after solidifying for 24 hours. This operation has no specific temperature limit and can be performed at any time.

2. Zero risk factor, zero pollution The chemical raw materials used in the epoxy resin casting technology have no irritating gas overflow during the stirring process, which eliminates the toxic gases discharged into the atmosphere after heating the zinc alloy at high temperature or the dust generated when stirring high-grade cement , Safe and environmentally friendly.

3, cost reduction epoxy resin (solvent-free) E-51, low molecular 650 polyamide resin, etc. are common chemicals in the market, the price is low. At the same time, the operation process such as heating is no longer needed in the filling process, which can save coke and electrical energy resources and greatly reduce costs.

4. Easy disassembly When replacing the old lining board, it is only necessary to cut off the replaced lining board by gas welding. The waste resin will naturally fall off due to heat, and there will no longer be difficult disassembly due to adhesion and rough surface. problem.

5. The labor intensity is reduced and the filling efficiency is improved. The epoxy resin casting technology is used for the operation, which requires only 1 or 2 employees, which saves time and effort, and is simple and fast. It only takes 1 hour from stirring to pouring completion. While satisfying the technical performance of the filler, the labor intensity is also effectively reduced.

6. The most obvious effect brought by the use of high-tech casting quality is the improvement of the quality of spare parts assembly, clear contours and high surface accuracy. Since the casting and solidification are performed at normal temperature, the porosity defects are reduced, and the pouring quality is greatly improved. ^[6]

Method for reducing energy consumption of stone crusher

The granular material in the crusher must meet the crushability requirements, and the strength of the material must be within the maximum strength that the crusher can handle. In addition, during the crushing process, non-crushable objects such as iron nuggets should be prevented from entering the crushing cavity. When the feed materials are mixed after being broken, there is a phenomenon of uneven strength of various materials. The materials with high strength will protect the materials with low strength, thereby reducing the probability of crushing and the particle size of the products with lower strength. In addition, due to the strength, the lining board of the crushing cavity is not uniformly stressed, which can eventually cause uneven wear of the lining board and affect the normal operation of the crusher. Therefore, in order to improve the working efficiency of the crusher, improve the stress of the components of the equipment, and give full play to the function of lamination and crushing in the crushing process, the uniformity of the strength of the feed material should be ensured as much as possible during the production process.

Experts analyze according to the concept of lamination and crushing. When the bulk material accounts for more than 40% of the crushing volume, complete lamination and crushing can be achieved during the crushing process. In addition, according to the full feeding situation of the crusher and the uniformity of the hopper jaw, when the material filling degree reaches 55%, it can fully meet the requirements of lamination crushing.

The lamination crushing method can achieve the energy saving purpose of the crushing equipment. In order to maximize the energy efficiency of the crusher, the lamination crushing feed needs to meet certain conditions, as we have described above. Existing studies have shown that when the bulk material is in layers 6-10, the energy saving and consumption reduction of the equipment is obvious. Generally, the average particle size of the feed equivalent is generally about half of the maximum allowable feed size, so the number of material layers in the feed layer is about 2. When the height of the plugging layer in the crusher is 93 mm, the average particle size of the material can reach 9.45 mm, so the number of feed layers can be determined as 9.8, and the plugging layer can meet the requirements of the optimal feed layer. Therefore, it is not difficult for us to find that in the crusher, the closer the number of feeding layers of the material in the plugging layer is, the more it can meet the requirements of the optimal feeding layer, and the crusher can achieve the purpose of energy saving and consumption reduction. ^[7]

Stone crusher selection tips

Mining crusher is an important equipment in mining. Mining crusher is divided into hammer crusher, jaw crusher, impact crusher, impact crusher and so on. Different mine crushers have different performances and prices.

When buying a mine crusher, the price is the object of general concern. Some people think that a high-priced mine crusher is a good mine crusher, this statement is not entirely correct.

Mine crushers produce different types of crushers according to different uses. For example, impact crushers are popular because of their simple structure and large crushing ratio. However, due to the low wear resistance of impact hammers and impact plates, Therefore, it is not smooth for the crushing work of high hardness materials. Because of the hammer head, the hammer crusher plays this huge role in the high hardness crushing, so the mine crusher is not necessarily expensive , But to decide what kind of crusher to choose according to their own needs to mine can save time and costs.