The screening machine makes use of the difference in the size and quality of the materials, as well as the difference in the settling speed of the liquid. Small materials and large materials will sink to the bottom of the tank. The grading screen uses the screw to push the materials upward, and then carries out the mechanical screening equipment. It can filter the materials in the mill according to the grade. Finally, it spins the larger materials into the feed inlet of the mill with the screw, and the filtered small materials overflow from the overflow pipe.
The grate gap is 1.1~1.2 times of the particle size of the material under the screen, and generally should not be less than 50mm. The screen plate is formed by punching steel plates. The holes are round, square or rectangular. The aperture is generally 10~80mm. It has a long service life and is not easy to block. It is suitable for screening medium particles. The mesh screen is woven or welded by steel wire. The holes are square, rectangular or long, and the commonly used hole diameter is generally 6-85 mm.
The long strip mesh is suitable for screening wet materials. The advantage of the mesh screen is that it has a large effective area. The principle of screening machine is divided into rolling screening and vibrating screening. Rolling screening includes screen shaft screen, roller screen, solid, spiral roller screen, blade roller screen, etc. Vibration screening basically includes banana screen, high service screen, relaxation screen, etc. Rolling screening principle equipment adopts forced conveying, which is not easy to cause material blocking screen surface. Due to its principle and characteristics, vibrating screening of viscous wet materials (generally more than 6% moisture) is easy to cause blockage and has high power.
Basic types and principles of screening machines
Vibrating screen can separate dry materials into various particle segments, remove large and small particles or separate impurities from slurry. The operator can set the material stroke and the speed of passing through the screen to provide maximum processing capacity and screening efficiency for any product, whether it is wet or dry, heavy or light, coarse or fine. The application of vibrating screen in the world has proved its high efficiency, reliability and wide adaptability. Industrial enterprises are widely used in the single-layer and multi-layer separation of particles, dry powder, slurry, etc.
2: Linear vibrating screen
Rectangular screening machine for general material separation in industrial production, including dry matter particle, powder separation, slurry filtration, etc. The material running track is not only a parabola in the forward direction, but also a circular movement in the plane, which greatly increases the screening weight and screening accuracy.
Engineers design new damping spring devices. The new mechanism has not only the function of damping, but also the function of transmitting exciting force and optimizing vibration curve; Smaller electric power can also bring larger screening capacity.
Excellent effect on screen surface adhesion and blockage caused by static electricity, dissolution, high moisture content, high viscosity, ultra-fine powder, etc
- External transducer to avoid material pollution
- More extensive screening
- Better screening efficiency and precision
- No mesh explosion, screen life is extended
- It has the function of re crushing caked materials
Fully enclosed and filled with inert gas to ensure low oxygen content and explosion-proof of the system
Separate molten large particles to provide stable guarantee for printing system
Automatic recycling and backfilling without manual intervention to avoid harm to human body
Less components, simple disassembly and assembly, easy to thoroughly clean, and reduce cleaning time.
