SU942796A1 - Multispiral dewaterer - Google Patents

Description

(54) MULTI SPIRAL DEFINER

one

The invention relates to the enrichment of minerals, and specifically to equipment for the dewatering of granular materials and can be used in the mining industry (mainly in the development of placer deposits), in the industry of non-metallic building materials, in the chemical and other industries.

Spiral classifiers of various types and structures are known, used to classify and dehydrate granular materials in the mining industry, as well as for dewatering and washing non-metallic building materials 1.

The disadvantages of these spiral classifiers, when used for dewatering granular materials coming in the form of high dilution slurries at high productivity facilities, are poor conditions for reducing the particle size of the solid in the sink due to the relatively small surface area of the water in the trough, lateral entry of loaded pulp and high discharge rate through an opening in the wall of the trough.

Closest to the invention in technical essence and the achieved effect is a multi-coil dehydrator comprising a body, partially immersed coils, separated from one another by a partition, a discharge device and a drain threshold 2.

However, this dehydrator retains the main disadvantages of the classifiers mentioned above.

The purpose of the invention is to improve the quality of dehydration.

The goal is achieved by the fact that the dehydrator spirals are equipped with shells installed over their immersed 15 parts, the drain threshold is provided with plates mounted on its edge with the possibility of their vertical movement, and the loading device is installed below the level of the drain threshold.

Claims (2)

FIG. 1 shows a multi-coil ° dehydrator, side view; in fig. 2 - the same, top view; in fig. 3 is a cross section A-A in FIG. one; in fig. 4 - detail I in FIG. 3; in fig. 5 is a section BB in FIG. 4. The dehydrator has a housing 1 with a sloping bottom, resting on the supporting frame 2 with sleigh runners. Above the bottom of the case there are three parallel spirals 3, the drive of which includes a two-stage gearbox 4 with a sharp difference in the gear ratios. The lower thrust bearings 5 spirals are carried out from the body to the outside by means of gland seals 6, located in the rear end wall of the trough. The spirals are spread across the trough and between them are placed longitudinal separating elements 7 having a double-slope cross-section, and the supporting overlaps 8, which also have a double-slope form, are fixed above the immersed parts of the spirals. In the lower part of the body, there is a snip-up chamber 9 with discharge openings on both sides of the body, equipped with hermetic closures. Above the chamber between the spirals, two loading vertical wells 10 are installed, having pulp receiving funnels in the surface part. Along the perimeter of the horizontal upper edge of the housing, the water intake chutes 11 and sectional sills consisting of plates 12, sealing elastic pads 13, patch slats 14 and clamps with nuts 15 are deployed. The proposed dehydrator works in the following manner. The loading pulp enters the receiving wells of wells 10, while the impact of the downward jet loosens the bed in the receiving chamber 9, preventing its compaction and maintaining the possibility of the penetration of material particles into it. The particles deposited in the body are transported in spirals, dehydrated in the surface zone and discharged through the upper opening in the inclined bottom. Drain occurs evenly along the entire perimeter of the horizontal upper edge of the housing through the plates 12 drain thresholds into the inlet chutes -11. To ensure strict horizontal position and straightness of the common edge of the drain thresholds, the plates 12 can be leveled along the rail with the level by moving the plates in all directions in a plane parallel to the side walls of the housing. Thanks to such a constructive solution, it is possible to maintain a constant and minimum possible discharge rate. The present invention allows to significantly improve the quality of dewatering granular material. Claims of the invention A multi-coil dehydrator comprising a body, partially immersed coils, a loading device and a drain threshold, characterized in that, in order to improve the quality of dehydration, the coils are fitted with shells installed above their submerged parts. M, the drain threshold is provided with plates installed in its edge with the possibility of their vertical movement, and the loading device is installed on the skimming weir level. Sources of information taken into account in the examination 1. V. Troitsky and others. Washing of non-metallic building materials. M., stroiizdat, 1972, p. 99-103. 2. Authors, USSR certificate № 403436, cl. At 03 B 5/52, 1972 (prototype). /// (/, Fig .. /