RU1803187C - Method for flotation of complex ores - Google Patents

Abstract

The essence of the invention is that ore pulp is prepared, flotation reagent is supplied, commodity concentrate and tailings are obtained, the concentration of the active substance in the flotation reagent is continuously monitored and the reagent consumption is varied inversely with the measured concentration of the active substance, while measuring the concentration of the active substance carried out by feeding the flotation reagent to the pulp.

Description

The alleged invention relates to the field of flotation concentration, in particular to methods of flotation of ores, and can be used in mining plants that enrich non-ferrous, rare metal ores.

The purpose of the invention is to increase the recovery of valuable components and the quality of concentrates by maintaining an optimal flow rate of flotation reagents.

In order to achieve the goal in a method involving the preparation of ore pulp, the supply of flotation reagents, the flotation of valuable components to obtain marketable concentrates and tailings, the concentration of the active substance in the flotation reagent is continuously monitored and the reagent consumption is inversely proportional to the measured concentration of the active substance. According to a further item, the concentration of the active substance is measured by feeding the flotation reagent to the pulp.

Continuous monitoring of the concentration of the active substance in the flotation reagent and the change in the reagent consumption inversely with the measured concentration of the active substance eliminates fluctuations in the concentration of the active components of the reagents in the liquid phase due to deviations in the chemical composition of the starting reagents, and violations of the preparation and dosage of the reagents. By active substance is meant a portion of the flotation reagent to ensure its effectiveness. Such parts are: in butyl xanthate - xanthogenation; in technical sodium cyanide, cyanide; in industrial vitriol - copper ion; in industrial zinc sulfate, zinc ion; in technical sodium sulfide - sulfide ion, etc. Measurement of the concentration of the active substance when the flotation reagent is fed into the pulp provides more accurate dosing due to the consideration of dilution, mixing and decomposition processes

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marrying flotation reagents during their transportation to the places of supply.

To carry out the process, the feed ore is crushed and ground, the desired solid flow rate is measured and maintained during grinding. The required reagents are fed into the flotation pulp in the required order: sulfidizers, activators, blowing agents, collectors, depressants, etc. Then the main, control and re-flotation flots are carried out. Collective concentrates, collective cycle tails are subjected to subsequent flotation operations, ultimately obtaining conditioned commercial concentrates and tailings. When flotation reagents are supplied, the concentration of the active substance (xanthogenate, cyanite, sulfide, copper ion, etc.) is continuously measured using selective physicochemical methods: spectral, mass spectral, potentiometric, volt amperometric, etc.).

The signals from the sensors are fed into a computer complex that calculates the flow rate of the flotation reagent according to the parameters of the solid phase (flow rate of solid, absorption capacity, etc.) or liquid (ionic composition of the liquid phase, potentials of electrochemical sensors, etc.), and inversely proportional to the measured concentration of the active substance in the reagent, the reagent consumption is adjusted. In the absence of systems for controlling the flow of reagent in the solid or liquid phase of the pulp, it is possible to control the flow of reagents directly on the dispensers.

An example of the method.

The initial lead-zinc-copper ore was crushed in two stages to a fineness of 90% CL-0.074 microns and collective copper-lead flotation was carried out in the Pyridan-Griswold mode. Sulfur and cyanide sodium and zinc sulfate were fed into the grinding. A mixture of isobutyl and isopropyl xanthate (1: 1) and oxal were fed into the flotation. As a result of flotation received copper-lead concentrate and tails. The copper-lead concentrate was separated, zinc minerals were floated from the tails of the copper-lead cycle. Ultimately, lead, copper and zinc concentrates were obtained.

EXAMPLE 1 In a supplied copper-lead xanthate cycle, the concentration of xanthate ions was measured. To measure the concentration of xanthate ions, a modified spectral

analyzer developed on the basis of the Reagent-ZA installation. Inversely proportional to the measured xanthate ion concentration (relative to the standard), the calculated flow rate of the solid xanthate solution was calculated. When implementing the method, by reducing the coefficient of variation of the flow rate in the flotation of the active substance

(xanthate ion) from 0.22 to 0.09, it was possible to reduce the deviation of the measured xanthate concentration in the pulp from the optimum and to achieve improved technical and economic indicators of flotation (see table 1).

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At the same time, the xanthate consumption was reduced by 0.5 g / t, and the separation cyanide consumption was reduced by 5 g / t of ore.

Example 2. The cyanide ion concentration was measured in a cyanide-ion concentrate fed into a lead-copper separation cycle, for which an AP-1-8 voltammetric analyzer was used. Inversely proportional to the measured concentration

5 of the cyanide ion (relative to the standard), the calculated flow rate of the solid flow rate of the sodium technical cyanide solution was measured. When implementing the method, by reducing the coefficient of variation of flow rate

0 during the flotation of the active substance (cyanide ion) from 0.15 to 0.07, it was possible to reduce the deviation of the measured concentration of cyanide from the optimum and to achieve improved technical and economic indicators of flotation

5 (table 1). The consumption of sodium cyanide was reduced by 4 g / t of ore.

Example 3. In copper sulfate supplied to the zinc flotation cycle, the concentration of copper cation was measured, for which purpose an X-ray fluorescence analyzer KRF-17 was used. Inversely proportional to the measured concentration of copper cation (relative to the standard), the solution flow rate calculated by the flow rate of the solid

5 technical copper sulfate. When implementing the method, by reducing the coefficient of variation in the flow rate into the flotation of the active substance (copper cation) from 0.13 to 0.06, it was possible to maintain the optimal

0 conditions for the activation and flotation of zinc minerals and to achieve improved technical and economic indicators of flotation (table 1).

The consumption of lime was reduced by

5 YuO g / t ore. The expected economic effect of using the proposed method in the processing of polymetallic ores at an enrichment plant from an increase in the yield and quality of commodity concentrates, as well as from a reduction in the consumption of reagents, will amount to 74.5 thousand rubles. per 1 million tons processed ore.

Claims (1)

SUMMARY OF THE INVENTION A method for flotation of polymetallic ores, including preparing ore pulp and changing the flow rate of a flotation reagent, obtaining a concentrate and tailings and measuring useful components in a concentrate, characterized in that, in order to increase the recovery of valuable components, the concentration of the active substance in the flotation reagent is continuously measured at feeding it into ore pulp, inversely proportional to which the flow rate of the flotation reagent is changed. Technical and economic indicators of enrichment of lead-zinc-copper ore