The crushing process is a process in which the material mass is reduced, and is the first stage of processing the ore material. For example, the starting process of the three-stage crushing process flow chart shown in the figure can be in the following order: fine crushing machine→ medium crushing machine→ coarse crushing machine→5 # belt conveyor→ # belt conveyor→vibrating screen→2 # ,3 # belt conveyor→ 1 #带机→é€çŸ¿æœº. Each link should also provide the time required for the start-up. VSI series Sand work characteristics Barmac Vsi Wear Parts,Barmac Vsi Crusher Wear Parts,Barmac B7150 Vsi Wear Parts,B7150 Vsi Wear Parts Ma An Shan Shi Bo Da Jing Shen Machinery Co.,ltd , https://www.bodamachinery.com
The crushing process is a very complicated process of dimensional change of the material block, which is related to the material resistance strength, hardness, toughness, shape, size, humidity, density and uniformity, as well as the interaction and distribution of the material block at the moment of breaking. The dimensional changes in the crushing process are complicated.
Due to the complexity of the crushing process, it is difficult to accurately detect and control the process parameters in the crushing process. The crushing process control is mainly to adjust the feeding amount of the crusher and the size of the discharge port to maintain the load balance between coarse crushing, medium crushing and fine crushing and the continuity of production, improve the efficiency of the whole crushing operation, and reduce the final product granularity. Reduce energy consumption and improve economic efficiency. Multi-stage (coarse, medium crush, fine crush) crusher control is a complex control system that also includes interlocking and control of auxiliary equipment. Firstly, the automatic control system of the single-stage crushing unit is adopted, and the entire crushing system control is realized on this basis. Although there are many introductions to the control of crushers at home and abroad, such as control methods based on electricity current or power, unit power consumption, material level, etc.; in fact, more crusher load control is used.
The crusher control system can be a conventional instrument control system or a computer control system. Due to the large lag of the crushing process and the changing nature of the ore, the fuzzy controller (Fuzzy Controler) was introduced into the automatic control system of the crusher, and satisfactory results were obtained.
This section focuses on two systems for crusher load control: one is a control system consisting of conventional meters, and the other is a control system with fuzzy controllers. To the sequence controller only for a general introduction, for the detection, excluding the external mixing apparatus endanger the safety devices ore metal objects, like the ore car illustrative only, as the application and design reference.
The continuity of the crushing operation requires a certain order of operation between the start and stop of each equipment, otherwise it will cause the crusher to clog and interrupt the production, and even cause serious equipment accidents. Therefore, in order to control the equipment between the crushing operations, a corresponding logic control system is designed. It can use logic control systems composed of logic devices such as relays, magnetic components, and semiconductors. However, due to the shortcomings of such logic devices, such as low anti-interference ability, poor stability, and easy damage, they are gradually replaced by more reliable controllers such as programmable controllers. The programmable controller overcomes the shortcomings of the above logic devices, and is flexible and convenient to operate and reliable in operation. For different applications, no major changes are required in the hardware, mainly to modify the programming software, which is very convenient to use. The sequence controller should meet the following requirements:
(1) Each piece of equipment must be started at a certain time interval in the order specified by the process. The starting sequence is opposite to the running direction of the ore material, and the crusher is usually started first.
(2) Each device can be started separately or in groups.
(3) When the production of the crushing is stopped, the order of stopping is opposite to the order of starting.
(4) When a certain equipment in the crushing system is forced to stop, in order to avoid problems such as blockage, all other equipment supplying the equipment and mineral materials must also stop, but its subsequent equipment can not stop.
(5) In order to improve the on-site environment, the dust removal equipment is first started, and when the system is parked, it is necessary to stop at the end. 
Downtime process. Feeding machine → 1 # belt machine → 2 # , 3 # belt conveyor → vibrating screen → 4 # belt conveyor → 5 # belt conveyor → coarse crusher → medium crusher → fine crusher.
The automatic control of the mine-distributing trolley is to distribute the qualified products of the belt conveyor to the grinding powder ore bin to the various mine bins. In order to prevent the ore from being segregated in the mine bin, it is ensured that the mill has a uniform particle size. Usually, the automatic control is performed according to the timing and sequence of the number of powder mines. This system is part of a sequential control system.
Interlocking control of other equipment, such as the ore mine ore level to the minimum, in order to retain a small amount of ore to protect the mining machine, from the direct collision of ore, should stop mining to the mine.
â’ˆ simple and reasonable structure, low operating costs.
â’‰ crushing rate, energy saving.
â’Š with a crushing, coarse grinding function.
â’‹ moisture content of materials subject to the influence of small, moisture content up to 8%.
⒌ more suitable for crushing hard, special hard material.
â’ product excellent in grain shape, cubic, flakiness content is extremely low.
Breaking automation technology---sequence control of crushing process