SU831178A1 - Apparatus for hydraulic classification of loose materials - Google Patents

Description

The invention relates to a technique for the hydraulic classification of bulk materials in an upstream flow of separating medium and can be used in many industries, in particular, in the salt industry, to clean salt from clay. A device for gravitational enrichment of minerals is known, which includes an inclined chute equipped with thrust plates 1 mounted on these trays. However, this device does not provide high quality separation of the material. It is also known a device for hydroclassification of bulk materials, including a body mounted obliquely and made in the form of a hermetically sealed casing, a conveyor of a device for loading material, supplying a separating medium and discharging selected fractions L2. However, this device also does not allow for the qualitative classification of bulk materials. The purpose of the invention is to improve the quality of the concentrate. The goal is achieved by the fact that the device is provided with a longitudinal p-partition separating the idle and working branches of the conveyor, and the loading device is made in the form of a bunker and a zigzag channel with a drain pipe, while the end of the zigzag channel is located in the zone of the idle branch of the conveyor. The drawing schematically shows the proposed device. The device for hydrclassification of bulk materials includes an inclined conveyor 1 for withdrawing a heavy fraction, covered with a sealing case 2, fed by a longitudinal partition 3, which separates the working and idle branches

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conveyor 1. On the side of the casing 2 there is a vertical zagag-shaped channel 4 which is connected to the idle branch of the conveyor 1 and has a top 5 for discharging the separation medium with a light fraction and a loading hopper 6.

On top of the casing 2, at the level of the mouth 5, to release the separating medium and the light fraction, 10 are connected with the cavity of the working branch of the inclined conveyor I, the fixture 7 for supplying the separation medium.

The device works as follows 15.

The source material is continuously fed from the hopper 6, a vertical zigzag channel in communication with the idle branch 20 of the inclined conveyor I. At the same time, through the device 7, a separating medium enters the cavity of the working branch of conveyor 1, the flow of which bends around the longitudinal partition 3 of the casing 2 from below a part of the cavity of the idle branch of the inclined conveyor I and rushes upward along a vertical zigzag channel 4 to its drain neck 30 and 5. All particles whose speed of fall is less than the speed the upward flow of the separating medium, - is carried out through the throat 5, and the particles whose speed falls above the speed of the separating medium flow down through the vertical zigzag channel 4 and enter the cavity of the idle branch of the inclined conveyor 1, where are picked up by conveyor buckets 40. Since the buckets of the inclined conveyor are made perforated, when the material is transported, an additional classification takes place on the counter-flow of the separating medium under conditions

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intensive mixing, which contributes to the additional grinding of the most difficult to separate particles of the light fraction.

The light particles are carried away by the flow of the separation medium, and the cleaned is desired. the fraction is transported by perforated buckets, dehydrated on leaving the separation medium and discharged.

The use of the proposed device for the hydroclassification of bulk materials significantly improves the quality of purification of the lake salt from difficult to separate silt contaminants.

Claims (2)

1. USSR author's certificate number 58} 991, cl. B 03 B 5/34, 1977. 2.Kirchberg G. Mineral processing. M., Gosgortekhizdat, I960, p. 191 (prototype).