SU891148A1 - Mechanical classifier - Google Patents

Description

(54) MECHANICAL CLASSIFIER

The invention relates to the separation of materials by size and density and can be used in the beneficiation of ores. Rack type classifiers are known for separating ore pulps by size and P. LITNESS, containing a stationary body (corito) and a mechanism transporting sand along the bottom of the case, made in the form of a scraper container 1. The disadvantage of these classifiers is the low efficiency of the separation process. The closest to the proposed technical solution is a mechanical classifier, which includes a housing consisting of a classification zone and a discharge zone, a transport mechanism executed in the form of a spiral, and an actuator 2. In the mechanical classifier, due to the slope of the bottom of the hull, spontaneous return of sand from the unloading zone to the sedimentation zone, their partial accumulation in the sedimentation zone, which leads to a decrease in the useful volume of the separation zone. As a result, the efficiency of the separation process decreases, and the internal circulation of sand leads to an overload of the spiral and additional energy consumption for their transportation. The purpose of the invention is to increase the efficiency of the classification process by reducing the circulation of sand. The goal is achieved by the fact that the bottom of the unloading zone of the classifier is made with a slope in the direction of unloading sands, with the helix c. the discharge zone is made with an increase in the diameter of the turns in the direction of unloading sands. The drawing shows a schematic section of a mechanical classifier. The classifier contains a housing 1 with a drain threshold 2 and a bottom 3. Inside the housing there is a shaft 4 with a spiral 5, which serves to transport the deposited sands up against the slope of the housing - to the discharge chute 6. In the unloading zone, the bottom of the hull has a slope in the direction of unloading sands, and the spiral goes from cylindrical to conical, expanding in the direction of unloading. The rotation of the shaft of the classifier is made through the gearbox 7 from the electrode Eight 8.

The helix may be cylindrical, mounted on a composite shaft, which in the unloading zone by means of a hinged connection may be located under a slope, parallel to the bottom of the housing.

The categorizer works as follows.

The loading; the first material enters the lower part of the housing 1, where it is divided into sands and discharge. The drain is removed from the classifier through the overflow threshold 2, and the sands are transported by coil 5 from the deposition zone to the discharge chute 6.

The bottom slope in the direction of unloading eliminates the spontaneous return of sand from the unloading zone, prevents their accumulation in the sedimentation zone and reducing the useful volume of the relaxation zone, thus contributing to the efficiency of the process of separation of materials and reducing energy consumption for their transportation.

The proposed design reduces energy consumption for sand transportation by 2 times.

Claims (2)

1. Olevsky v.A. Constructions and calculation of mechanical classifiers and hydrocyclones. M., Gosgortekhizdat, 1960, p. 14-21. . 2. Ibid, p. 31-33 (prototype).