How to Select Mining Vibrating Screen

For the selection of the mining vibrating screen, there are many people are confused and they don’t know how to choose, because there are many kinds of vibrating screens. If you want to choose a suitable mining equipment screening machinery, you must first understand the structure and working princes, the advantages and disadvantages and the scope of the applicability of the vibrating screen.

Now let us discuss these kinds of mining vibrating screen.

First,let us talk about the gyratory vibrating screen. The body is one plane. The plane trajectory is divided into linear motion, circular motion, elliptical motion and complex motion. Shaking screen and vibrating screen belong to this category.

Second, we will introduce the roller screen. The working face is composed by the horizontally arranged root scroll axis shaft. There are plates on the bearing. The fine materials go through the gap between rollers and plates. The bulk materials is driven by the roller to one end and discharged from the end. The concentrators rarely use this screen.

Third, we will introduce the shaking screen. The crank linkage is regarded as the transmission part. Motor is rotated via a belt and pulley drives the eccentric shaft for rotation. The body moves with the connecting rod for reciprocating movement along a certain direction. The direction of movement of the body is perpendicular to the strut or the center line of the hanging rods. The material on the screen is moved to the discharge end with certain speed due to the swinging motion of the body so that the material also be sieved. Compared with the above screens, the productivity and the screening efficiency of the shaking screen is higher. The disadvantage is that the driving force is poorly balanced. The concentrators rarely use it, and the structure is replaced by more reasonable vibrating screen.

Forth, we will talk about the fixed screen. The working parts are fixed and slide along the working surface and make the material screened. The fixed grid screen is common used in the concentrator for rough crushing and the pre-screening before medium crushing. It is simple in structure with convenient manufacture. It dose not consume power and it can directly unload the ore to the screen surface. The main drawbacks are the low productivity and low screening efficiency.

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Need to be aware of the problems in the process of replacing mesh

It is well-known that mesh needs to be replaced when it was damaged. How to make the screen deck tension when it be replaced, and how to avoid generating resonance when the mesh be used, solving these problems are important factors of normal operation of equipment. this is our summary on the basis of replacing mesh.

Changing mesh is a simple process, but if the user does not pay attention to details, it will lead to a trouble situation that materials don’t move on the screen deck or the material motion trail is disordered when the machine is running.

We analyze the reasons,and take linear vibrating screen as an example. Normal mesh has high degree of tension, there is about 1cm gap to ensure that mesh has a certain vibrating space for avoiding screen plugging when the deck be pulled by hand in the vertical direction. However, the screen deck can not too loose, otherwise, it will generate resonance between screen deck’s vibrating frequency and equipment vibrating frequency, materials will be running in circles on the deck and not discharge. The screen’s installation needs in a certain way.

It needs three people to operating when changing mesh. the screen frame is supported by hard objects on both sides of screen frame firstly, after that, user spread the mesh on the screen frame, the mesh needs to be pressed well by both sides of screen frame. Then, one side of mesh be fixed in the screen frame, meanwhile, please pay attention to reserving a certain size mesh on both sides of screen mesh,avoid the vibrating screen leaving the materials out when running. Next, user tamp down the middle of screen frame, and tighten up the sieve, after fastening the other side of sieve, the hard objects will be removed, mesh will be tightened and straightened by screen frame automatically. Finally, we just need nail down them. Then it can be installed on vibrating screen.When you nail down the sieve, not only has each nail to be fastened up, but also it has the equal distance. When it comes to the last step, it is careful to install to avoid scratching the mesh.

Some type of linear vibrating screen is multi-layer design, and it uses the letter wire frame, there are some bouncing ball to prevent blogging in the screen grid. The larger Wire Diameter should be installed first when user replacing the mesh, thus avoiding thinner sieve damage.