CS239185B1 - Lamella thickener for thickening flotation concentrates - Google Patents

Abstract

The lamellar thickener is intended for thickening flotation concentrates or other suspensions prone to the formation of mineralized foams. It consists of an inlet co-current lamellar section, above which a membrane breaker is located, and a countercurrent lamellar section, above which one or more foam collectors are located. A collecting pyramid is located under both lamellar sections, with a discharge opening in its lower part. It is advantageous to create the thickener overflow with a siphon. The lamellar thickener is applicable for thickening flotation concentrates, foam intermediates and suspensions with the formation of mineralized foams, especially in the treatment industry, in ironworks, etc.

Description

The lamella thickener according to the invention solves the thickening of the flotation concentrates as well as other suspensions prone to the formation of solid particles of enriched foams, hereinafter referred to as mineralized foams.

A drawback of the known thickeners or lamellar thickeners is that when the flotation concentrates or other suspensions are susceptible to mineralized foams, mineralized ipena is formed at their surface, which largely goes to the thickener overflow, which is usually the case with concentrates · non-ferrous metals. represents considerable losses. To prevent major losses, e.g. As a rule, sulphide concentrates are not thickened at all prior to their filtration, and as a result, there may be up to five times higher demands on filtration capacity, electricity consumption and maintenance.

The drawbacks of the prior art lamellar thickeners are eliminated by the lamellar thickeners according to the invention, which consists of an inlet co-current of a lamella section over which a mechanical foam breaker is placed, an ip-flow lamella section over which one or more summers are located. foams. There is a collecting pyramid under both lamellar sections, which has an outlet opening in its lower part. The overflow of the lamella thickener is advantageously provided in the form of a siphon.

The higher effect of the lamella thickener according to the invention is achieved by the fact that when the suspension is prone to form mineralized foams, the loss of the suspenside into the overflow of the thickener is significantly reduced. It makes it possible to densify the flotation concentrates, in particular the colored Ikove concentrates, which until now have not been thickened due to their high cost and high losses, which reduces the capacity, energy and maintenance requirements of the filtration.

An exemplary embodiment of a lamella thickener according to the invention is shown in longitudinal section in the attached image.

Referring to Figure 1, the suspension enters the thickener above the upstream lamella section 1. The suspension descends in this section in the inclined inter-lamellar spaces, and the solid particles settle on the inclined lamellas, after which they slide in accordance with the descending suspension to the collecting pyramid 5 provided. At the same time, the suspension is vented in this section. The particulate-depleted suspension rises in the upstream lamella section 3, where it removes the remainder of the suspension and the clarified water leaves the thickener through an overflow, preferably a siphon, which prevents mineralized foams from escaping. On the surface and above this section there is the possibility of foam formation, which is conveyed by means of foam sweepers 4 above the upstream lamella section 1, although together with the foam formed therein is continually disposed of by a foam breaker 2 which can be mechanical, vacuum, penumatic, water shower and .

The lamellar thickeners according to the invention are useful in the treatment mainly for thickening flotation concentrates and foam intermediates, in ironworks for cleaning oil emulsions! from solid particles such as metal particles, scales and the like, and wherever the threphase suspension is concentrated.

Claims (2)

SUBJECT A lamella thickener for thickening flotation concentrates as well as other suspensions susceptible to mineralized foams, characterized in that it consists of an inlet co-current lamella section (1j) over which a foam breaker (2) is located, a counter-current lamella section (3) over one or more SUMMERS of foam generators (4) are disposed, wherein under both lamella sections (1, 2) a collecting pyramid (5) is placed in its lower part with an outlet opening (6). 2. A lamella thickener according to claim 1, characterized in that the overflow of the thickener is formed by a siphon (7). 1 sheet of drawings ·