In the production process of 50-mesh ferrosilicon powder, in order to screen out the materials whose particle size meets the requirements, it is necessary to screen layer by layer. The existing method is generally multiple sieving, that is sieving once through sieves with different mesh numbers. , and finally, get 50 mesh ferrosilicon powder that meets the particle size requirements. However, this one-time screening needs to pass through multiple screening equipment, and the discharge port is often set at the lower layer of most screening equipment, and the middle screen needs to be taken out to pour out the residue. It is very inconvenient, and the materials obtained by multiple screenings are different, and materials need to be mixed.
During the production process of 50-mesh ferrosilicon powder, the 50-mesh ferrosilicon powder of different particle sizes screened out by the vibrating sieve is fully mixed evenly, and the mixing is accelerated under the action of the mixer, among which the screw mixer is a commonly used mixing equipment. At present, the screw mixer on the market is not only complex in structure, but also has a single function. The mixing is not uniform enough, resulting in poor mixing quality of materials and affecting mixing efficiency. The inner wall material is cleaned up.
It is used in the production process of 50 mesh ferrosilicon powder to set a primary vibrating screen, a secondary vibrating screen and a tertiary vibrating screen. The 50-mesh ferrosilicon powder directly enters the primary vibrating screen, and the primary vibrating screen, secondary vibrating screen and primary vibrating screen are composed of upper and lower sieves. The outlet of the upper screen of the primary vibrating screen is connected to the inlet of the secondary vibrating screen. The outlet of the upper screen of the second-stage vibrating screen is connected with the inlet of the third-stage vibrating screen, the outlet of the lower screen of the second-stage vibrating screen is connected with the finished product conveying pipe, and the inlet of the upper screen of the third-stage vibrating screen is the outlet of recycled materials. The outlet of the lower layer of the vibrating screen is connected with the finished material conveying pipe, and the finished material conveying pipe is connected to the feeding port of the spiral mixer.
The spiral mixer includes a spiral mixing shell, and a lifter is vertically arranged in the spiral mixing shell, and the lifter is fixed at the bottom of the spiral mixing shell, and a rotating mandrel is installed in the material lifter, and the lower end of the rotating mandrel passes through the bearing It is fixed at the bottom of the screw mixer shell, and the upper ring of the rotating mandrel is equipped with a screw piece, and the rotating mandrel is connected with the output shaft of the motor through a bearing. reducer. The feed port, the finished material conveying pipe extends into the shell of the screw mixer and is connected with the feed port at the lower end of the material lift pipe.
The 50-mesh ferrosilicon powder vibrating screen is divided into three stages, each stage vibrating screen includes two layers of screens, and the outlet of the upper vibrating screen of each stage is connected with the inlet of the lower vibrating screen. The 50-mesh ferrosilicon powder separated from the upper layer can be sieved and separated again by the lower vibrating screen until the final material separated from the upper layer of the vibrating screen is collected through the reclaimed material outlet for recycling and reprocessing production, reducing the cost of vibrating screens at each stage. The operation of recycling 50 mesh ferrosilicon powder saves time and cost. The 50-mesh ferrosilicon powder separated by the lower sieve of each level of the vibrating screen is transported to the screw mixer through the finished product discharge pipe for full mixing so that the different materials separated by each level of vibrating screen are mixed evenly, and the ferrosilicon powder with uniform particle size is obtained; The 50-mesh ferrosilicon powder drives the lifting mechanism and the stirring mechanism to rotate through the rotation of the rotating mandrel, so as to achieve the purpose of lifting and stirring the material and make the mixing more thorough; there is also a brush fixed on the stirring blade, which can remove the adhesion on the inner wall of the spiral mixer shell. 50 mesh ferrosilicon powder particles.