The vibrating screen is rich in variety and widely used, no matter what kind of screening equipment, the screen plate is an indispensable part. It is in direct contact with the material and inevitably will always be worn, so it is not wear-resistant. At present, the structure, performance characteristics and selection principles of several vibrating screen plates that are mature in production and use are analyzed for your reference.
1, all polyurethane sieve plate
The whole polyurethane screen plate is welded from the flat steel skeleton, in which the skeleton tooling is the design difficulty, which is a new type of fine selection products, gradually replacing the stainless steel screen plate in recent years. The whole polyurethane screen plate is mainly used in coal mine, iron ore, copper mine, gold mine and other classification, dehydration, screening and other places, is the vibrating screen must be configured parts. Because the use conditions of the screen plate are very harsh, requiring corrosion resistance, wear resistance and aging resistance, the size of the screen seam needs to be small enough when used.
Advantages: polyurethane high wear resistance, high elasticity, sound absorption, shock absorption, not easy to run rough, good wear resistance, long service life, high screening quality, strong self-cleaning ability, good screening performance, reduce noise, improve the operating environment, wide range of application.
Disadvantages: Product size change is not flexible, high production costs.
Selection principle: all kinds of linear vibrating screen dehydration, demedium, demud.
2, polyurethane composite sieve plate
The screen plate is the resistance heat energy generated by the roller resistance welding machine through the contact surface of the weldment joint and the adjacent area by using the current to heat the welded metal to the local melting or to reach a high plastic state, and then the external pressure is used to weld it into the screen surface, and then the assembly process is carried out to make it solid. On this basis, the frame is vulcanized on the polyurethane material. The screen plate is made of stainless steel as the screen surface, and the frame and support ribs are made of Q235-A carbon steel flat iron as the material frame.
Advantages: narrow screen can be selected, high opening rate, sound absorption, shock absorption, not easy to run rough, convenient disassembly.
Disadvantages: low screening rate, plugging, sieve easy to break, easy to wear, easy to run out of large particles of ore after wear and tear, and will lose the use value after wear or fracture, indirectly resulting in high cost, operation and maintenance inconvenience, this screen plate in the domestic Taiyuan and Anhui many manufacturers can produce, easier to promote.
Selection principle: all kinds of linear vibrating screen, coal slime curved screen dehydration, desliming, desliming.
3, all stainless steel polyurethane composite sieve plate
The stainless steel polyurethane composite sieve plate of this new process is pressed into wedge-shaped wire by E200 stainless steel round wire and welded with stainless steel convex support ribs by thermoplastic drum resistance welding process or argon arc welding process. The frame is also vulcanized with polyurethane material. The convex support ribs replace the stainless steel convex wire part, and the process of welding support ribs during assembly is also eliminated. The outer border is made according to the needs of the user.
Advantages: large overall stiffness, small magnetism, sound absorption, shock absorption, not easy to run rough, easy to disassemble and assemble, especially suitable for heavy medium coal preparation plant dehydration operations.
Disadvantages: The production process is complex, the technology is relatively weak, the quality is not easy to guarantee, in the drum resistance welding rotation welding, the convex support bar is easy to weld inclined, affecting the quality and appearance of the product, the production cost is high, and it is not easy to level, the effect after leveling is unsatisfactory. There are relatively few manufacturers with this process, and it is difficult to promote and apply.
Selection principle: moving sieve, banana sieve dehydration, demediating.
4, welding strip seam sieve plate
Welded seam screen plate is a relatively mature and old-fashioned screen plate, it is mainly composed of stainless steel screen plate and stainless steel flat iron or Q235-A carbon steel flat iron material frame welding, of which stainless steel screen plate welding is the use of roller resistance welding machine welding, rolled into different sections and the same section of wedge screen and convex back bar, Using resistance heat and current welding, belongs to the contact resistance welding process.
Advantages: The working surface stiffness is large, narrow sieve can be selected, the opening rate is high, the size change is flexible, and it is easy to process and form.
Disadvantages: high noise, easy to run rough, not easy to disassemble, and poor surface wear resistance and smashing resistance during work.
Selection principle: all kinds of linear vibrating screen, coal slime curved screen dehydration, desliming, desliming.
The above is the introduction of the advantages and disadvantages of the four vibrating screen plates and the selection principles, different users can according to their own production requirements, washing process and equipment needs and other characteristics, under the premise of meeting the production process indicators, choose suitable for their actual situation and cost-effective screen plates, so as to create greater economic benefits.
Post time: Dec-10-2024