Spiral Classifier

Introduction of Spiral Classifier

The spiral classifier is one of the equipment for mineral processing. The spiral classifier is a kind of equipment for mechanical classification based on the principle that the specific gravity of solid particles is different, so the speed of precipitation in liquid is different. It can filter the powder grinded out of the mill, and then screw the coarse material into the feed inlet of the mill with spiral blades, and discharge the filtered fine material from the overflow pipe. Screw classifier is referred to as classifier for short. Classifiers mainly include high weir type single screw and double screw, submerged type single screw and double screw.

Application of Spiral Classifier
It is widely used to form a closed cycle process to split mineral sand with ball mill in ore dressing plants, grade ore and fine mud in the gravity ore dressing plant, or for the pulp size classification in the metal beneficiation process, as well as desliming and dehydration in washing operations. Spiral classifier has the characteristics of simple structure, reliable work, convenient operation, etc.

Structure of Spiral Classifier
The spiral classifier of our company is mainly composed of transmission device, screw body, tank body, lifting mechanism, lower support (bearing bush) and ore discharge valve. The classifier produced by our company adopts advanced technology research and development, featuring simple structure, reliable work, convenient operation, etc.
Advantages of Spiral Classifier
1. Large capacity, simple structure, low cost.
2. Reliable operation, convenient repair, good grading and washing effect.
3. It is the integration of washing, dehydration, desliming and controlling of the particle size, which is efficient and multi functional.
4. The screw axis has good wear resistance, fine granularity, excellent classification fineness, low anti sand rate.

The spiral classifier is based on the principle that the size and specific gravity of solid particles are different, so the settling speed in the liquid is different [1]. Fine ore particles float in the water and overflow, while coarse ore particles sink at the bottom of the tank. A classification equipment that is used to carry out mechanical classification by pushing the screw to the upper part. It can grade the powder grinded in the mill to filter, and then screw the coarse material into the feed inlet of the mill by using the spiral vane to discharge the filtered fine material from the overflow pipe. The base of the machine is made of channel steel, and the body is welded with steel plate. The inlet head and shaft head of the screw shaft are made of pig iron sleeve, which is wear-resistant and durable. The lifting device is divided into electric and manual.