About the application of mobile crushing plant
Mobile crushing plant as material crushing and conveying equipment is widely used in mining, building materials, construction and other projects abroad, and there are more manufacturers and product model specifications at home and abroad.
For large equipment, the following problems must be solved:
1. Yard arrangement
Mobile crushing equipment as a large equipment, its site and location have high requirements.
2. Mobile
As a yard mining construction equipment, its flexible mobile requirements must be fully reflected, the use of improper will lead to mining crushing and in the process of mining down section, the time and production volume is not effectively guaranteed.
3. Safety
In the work of equipment and drilling and blasting operations for effective interface, to address the safety of equipment and continuous production between the process design relationship equipment normal use.
4. Yard planning and dredging equipment with
The front yard site due to relatively small, crushing equipment and dredging equipment can play an advantage is a difficult problem faced in the early stage, but when the yard is open, the subsequent transport equipment with the key directly related to the successful completion of the yard mining.
The main technical measures of the mobile crushing plant:
1. The arrangement of mobile crushing plant in the quarry
The arrangement of the mobile crushing plant in the quarry is the key to the application, which is the key to the effectiveness of the mobile crushing plant, to improve its production efficiency, to reduce the operating cost and to reflect its superiority. The arrangement of mobile crushing plant in the quarry is influenced by the terrain of the quarry, mining area, blasting technology, dredging and loading equipment, and subsequent material transfer conditions, etc. There are many ways to arrange the mobile crushing plant. According to the examples of mobile crushing plant in some engineering applications, it can be roughly divided into the following arrangement methods:
A. The mobile crushing plant is arranged at the mouth of the chute, and the material is transported and unloaded into the crushing plant by self-dumping car, and the stone is directly unloaded into the chute after crushing.
B. The mobile crushing plant is arranged in the material yard, and the material is transported by the self-unloading car, and the stone is transported by the subsequent semi-mobile tape machine after crushing.
C. The mobile crushing plant is arranged on the mining surface of the quarry, the excavator directly loads the material, and the crushed stone is transported to the semi-finished product yard by the mobile tape machine and the subsequent semi-mobile tape machine and fixed tape machine.
For A, B two arrangement way, in the implementation still need to dump car transport stone, can not better play the superiority of mobile crushing plant. However, under some specific conditions, it is necessary and feasible to adopt these two arrangements.
2. Mobile crushing plant with dredging and loading equipment
The combination of the two types of equipment has certain advantages for tipping car feeding and can feed itself, and also has a very good effect for the transportation of crushed stone. When the dump truck feeds, due to the limitation of the unloading position, it is necessary to wait for the last truck to finish unloading and drive out, and then the next truck will come to the opposite position to unload. Thus, there is an interval between unloading operations. And because the car can only unload the stone at the back of the crusher feed hopper, the crusher is fed by the bar feeder, and the length of the bar feeder is 5000mm, so there is a time for the stone to pass through the feeder to the crusher. These factors cause a relative decrease in the production capacity of the mobile crushing plant when a vehicle is used to feed the material. When the excavator is used to supply material directly to the crushing plant, the production capacity of the mobile crushing plant is increased.
3. Mobile crushing plant blasting safety protection
The application of this method in the mining and blasting design of the material yard is basically the same as the common material yard open only blasting design requirements. However, there are two related issues that need special attention. The first is to avoid damage to the crushing plant and the tape machine caused by flying rocks during blasting. The second is to blast as large a volume as possible to reduce the frequency of cannon shifting for mobile crushing plants and mobile tape machines. Mobile crushing plant is suitable for crushing equipment arranged in the yard, so in the design of the whole machine, in the planning of the yard, the movement of equipment and blasting technology, there is a problem of gun avoidance protection.
In the functional design of the equipment, a crawler type walking mechanism has been designed so that the mobile crushing plant can be shifted more easily and can be withdrawn to the blasting safety zone. The connection between the two tapes, and between the tapes and the crushing plant, is a twisting mechanism with a connecting turntable, which can be bent to 300° horizontally between the two tapes, and the discharge hopper at the end can be moved by rolling on the track. These mobile mechanisms are designed so that the mobile crushing plant can better adapt to the need of avoiding gun shifting.
Conclusion:
After taking the above measures and making continuous adjustment and improvement in the actual construction, the mobile crushing plant has been solved from the technical aspects at present. However, considering that the equipment must be imported, the investment is large, and as the first time to use, the reliability of equipment operation is not enough to know. Therefore, equipment economy and operation is the biggest factor that restricts the application of equipment.
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