SU1646608A1 - Process for conditioning return waters in flotation - Google Patents

Abstract

The invention relates to the enrichment of a field. Fgl x fossil flotation, in particular, to methods of conditioning circulating water in mineral processing plants. The goal is to increase the efficiency of circulating water conditioning. Plums thickeners concentrates and dehydrating hydrocyclones are subjected to settling. Purified recycled water is fed to a flotation unit, where it is divided into foam and chamber products. The medium is fed to the froth product and saturated with dispersed gas. The chamber product and the liquid phase of the froth product are fed to the flotation process. While maintaining the output of the liquid phase of the froth product in the range from 25 to 40% of the amount of the original circulating water after cleaning it from solid particles. Achievable stabilization of the flotation pH and an increase in the efficiency of dispersion of air.h ensure an increase in the technical and economic indicators of flotation. 1 hp f-ly. (WITH (/)

Description

The invention relates to the enrichment of minerals by flotation, in particular, to methods for conditioning recirculating waters at concentration plants.

The purpose of the invention is to increase the efficiency of circulating water conditioning.

The method includes purification of recycled water from solid particles, saturation of circulating water with gas to form a gas-liquid mixture, separation of gas-liquid mixture into foam and chamber products, treatment of products with chemical additives, supply of chamber product and processed foamy product to flotation. A medium regulator is introduced into the froth product as a chemical additive and is saturated with dispersed gas. At the same time, the liquid phase of the froth product is kept in the range from 25 to 40% of the amount of initial circulating water after cleaning it from solid particles.

The method is carried out as follows.

The implementation of the method is based on using the properties of most surfactants (blowing agents, fatty acid soaps, amines, dithiophosphates, sulfonates, etc.) to adsorb and concentrate at the gas-liquid interface. The interface is created by saturating circulating water with finely dispersed gas bubbles. When passing through the thickness of the liquid phase, surfactant accumulates on the surface of the bubbles. Surfactant bubbles are carried to the foam layer and are continuously removed from the process as a foam product. The concentration of surfactant in the new T X. .-- i-,: to bubble films, can n: L.-: ;; iiii pa

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exceed their concentration in the original liquid. Surfactant extraction reaches 85- 95%

By adding the appropriate environmental controllers to the froth product, the surfactants are converted into ionic form. The subsequent re-saturation of the frothy product with dispersed gas again creates the conditions for adsorption of flotation reagents on the surface of gas bubbles, but already in the ionic form most active in relation to the surface of mineral particles.

Obtained in this way, and then activated bubbles introduced into the mineral suspension interact more intensively with particles of minerals, ensuring their complete extraction

The use of such surfactant-concentrated solutions is the basis not only to increase the technological indicators of enrichment, but also to significantly reduce the consumption of basic flotation agents.

Example I In a laboratory flotation machine with a capacity of a chamber of 1 l, float apatite-containing ore, ground to 100%, cells 0.315 mm Weigh of 300 g Reagent consumption, g / t mixture of fatty acid soaps 120; OP-4 reagent, 40 liquid glass, pH of their pH 9.3-9.7 is maintained by NaOH

The conditioning time of the pulp with reagents is 1 min, the flotation time is 1 min. In all experiments carried out according to the proposed method, the following conditions are met.

the processing time of the source water with dispersed air with their separation into frothy and residual products is 3-4 minutes,

the medium controllers of the liquid phase of the foam products are supplied in quantities that provide a pH equal to this indicator in the ground pulp, or during conditioning, or during flotation,

Before flotation in the process, the liquid phase of the foam products is saturated with dispersed air

The first series of experiments is carried out according to a well-known method on initial samples, which are crushed and floated using recycled water from the tailings and the thickener of the final apatite concentrate at a ratio of 1 I. The circulating water and drains are removed, mixed and the mixture is settled

The second series of experiments was carried out according to the proposed method at a variable flow rate of the collector to the head of the flotation process.

The optimum yield of the liquid phase of the froth product is 25-40% of the amount of purified recycled water treated by air.

Example 2 In a laboratory flotation machine, copper-nickel is separated.

ore, crushed to 60-62%, cl. 0,074 mm at pH 9.5-10.0.

The weight of the sample is 300 g. Consumption of reagents, g / t. xanthate 100; soda 1300; Aeroflot 30 5 (at the same time xanthate and soda are fed to grinding, and Aeroflot to air conditioning with a contact time of 1 min). Flotation time b min

Experiments according to a known method are performed on the discharge of the final thickener (E concentrate, which is selected on a continuously operating pilot plant when conducting tests of the enrichment technology of copper-nickel ore. Drain before use defend 5 The second series of experiments is carried out according to the proposed method. makes up 25-40% of the initial amount of purified treated treated water

Example 3 In a laboratory flotation machine 0, quartz-containing ore with a particle size of 100%, class 0.040 mm, is separated.

Flotation is carried out in a weakly acidic medium at a pH of 6.2-6.5 and a collector consumption of 100 g / t. As the latter, g lilaflot (Swedish-made amine) is used, the pH is regulated by sulfuric acid. The contact and float times are 1 and 5 minutes, respectively.

The first series of experiments (by a known method) is carried out on circulating water, selected by thickening foam and chamber products of quartz ore flotation, specially carried out to obtain a mixture of water in the required amount. The ratio of water in the mixture is maintained at 2: 1.

The second series of experiments is carried out according to the proposed method with a variable consumption of the collector.

Example 4 Under laboratory conditions, float apatite-carbonate ore, crushed to 100%, cl. 0.315 mm.

The volume of flotocamera 1 l, weight

0 300 g Consumption of reagents, g / t: soda 3300;

liquid glass 560; pH of the pulp 9.3-9.5;

sulphate soap 800; alkanolamide 500

In this case, soda and liquid glass are fed to the first and second methods of conditioning for 2 and 3 minutes, respectively; sulphate soap is used in flotation

The first series of experiments (according to a known method) is carried out on the circulating water of the tailing, which is defended before use.

The second series is carried out according to the proposed method with a variable flow of sulphate soap.

The liquid phase of the frothy product is 25-40% of the amount of recycled water treated with air.

Using the proposed method allows for 4-10% increase in extraction

valuable components in rough concentrates, reduce the consumption of basic flotation agents by 30-40%.

Claims (2)

1. Method of conditioning circulating water during flotation of minerals, including purification of recycled water from solid particles, saturation of water with gas to form a gas-liquid mixture, separation of a gas-liquid mixture into a froth product and a liquid phase, treatment of products separation with chemical additives and their use in flotation, characterized in that. In order to increase the efficiency of conditioning of circulating waters, the froth product treated with a chemical additive is saturated with dispersed gas, and the medium regulator is introduced as a chemical additive. 2. A method according to claim 1, characterized in that the liquid phase of the froth product is maintained within 25 to 40% of the initial circulating water after cleaning it from solid particles.