BG66051B1 - Method for the selection of summation and foam producing reagents in the flotation of non-ferrous metal ores - Google Patents

Abstract

The method is used for the selection of reagents and foam agents in the flotation of non-ferrous metal ores such as copper, copper-pyrites, copper-zinc, copper molybdenum, lead, lead-zinc, tungsten and molybdenum-tungsten ores. It secures selectivity of the process of flotation and higher degree of extraction of the valuable components. Before carrying out the flotation the contact potential difference (CPD) is measured between a standard electrode and the surface of the mineral and/or individually of the minerals contained in the ore. The CPD between the standard electrode and the summation or foaming agents, respectively, is also measured. The data produced are compared and that summation reagent is selected, or foaming agent, respectively, which has the greatest difference between the CPD values of the mineral, and the summation mineral or foaming agent, respectively.

Description

(54) METHOD OF SELECTION OF REAGENTS AND FOAMS FOR FLOATING OF P5D OF NON-METAL METHODS

The invention relates to a method for the selection of reagents-collectors and foaming agents in the flotation of non-ferrous ores such as copper, copper-pyrite, copper-zinc, copper-molybdenum, lead, lead-zinc, tungsten, molybdenum-tungsten ores.

BACKGROUND OF THE INVENTION

From the practice of conducting flotation of non-ferrous ores it is known that for a certain type of ore the flotation reagents are selected on the basis of long-term experimental studies. The disadvantage of this method is that when the material composition and surface state of the ore minerals are altered due to the influence of the atmosphere and groundwater, the reagents often found are not effective enough, which leads to a decrease in the extraction rate of the ore minerals.

It is also known that, for determining the flotation properties of ore minerals, parameters such as the wetting angle, the force of bursting of the bladder from the mineral surface are determined (SV Dudenkov et al. Fundamental theories and practices of the used flotation reagents. Nedra, M , 1989). The known methods for determining the flotation properties of minerals do not provide for the selection of reagents and foaming agents, depending on the surface properties of the minerals.

SUMMARY OF THE INVENTION

The problem to be solved by the invention relates to the selection of the most suitable reagents-collectors and foaming agents in the conduct of flotation of non-ferrous ores, which will ensure the selectivity of the flotation process and a higher degree of extraction of valuable components.

The essence of the method for selecting reagents-collectors and foaming agents is as follows. Prior to the flotation, the contact potential difference (DAC) between the reference electrode and the mineral surface and / or the minerals contained in the ore is measured. The DAC between the reference electrode and the collecting reagents and foaming agents, respectively, is also measured. The obtained data are compared and this reagent collector or foam reagent is selected, which has the largest difference between the values of the CRC of the mineral and the collector reagent or foam respectively.

The advantages of the method of selection of reagents-collectors and foaming agents according to the invention are expressed in the following. Taking into account the surface state of the minerals immediately prior to the flotation process, the most appropriate reagents for the particular mineral are selected. This increases the selectivity of the process and the degree of extraction of valuable components. The method makes it possible to select mixtures of several available reagents according to a particular mineral raw material.

Examples of carrying out the invention

The contact potential difference (DAC) between the reference (gold) electrode and the mineral, respectively, the liquid reagent, is measured using a known instrument according to the Kelvin-Zisman method (Bucheim G. Contact potential difference measurement applied to silicon-insulator structures, 1978, 26 , X 11).

A monolithic tablet with a smooth surface is prepared for the measurement of the CRC of the mineral phase, and in the liquid phase in a cuvette, where 1 cm ³ of the reagent collector or foaming agent is placed. at a minimum distance (about 0.2 mm) and with the help of a vibration system the standard is set in vibrant motion. After the corresponding conversion, a final signal in mV is obtained which shows the sign and the value of the potential.

The invention is illustrated by the following non-limiting examples.

Example 1. A sample of lead-zinc ore with a lead content of 1.56% in the form of galenite (PbS) and zinc of 2.43% in the form of sphalerite (ZnS) was taken. For their flotation

66051 B1 foaming agents can be used - Shell, pine oil, Sinol, as well as reagents such as isobutyl xanogenate, dithiophosphate, secondary amine, sodium oleate. The CPG of the lead-zinc ore is measured in the form of a monolithic tablet, as well as samples taken at 1 cm ³ of all the liquid reagents listed above - collectors and foaming agents. The results show the following:

The ore of the ore sample is 240 mV.

Collectors - DAC (mV)

Isobutyl xanthate-140

Sodium oleate 250

Dithiophosphate45

Secondary amine 180

Foaming agents - CRC (mV)

Pine oil290

Shell120

T66210

T8090

The most suitable collector reagent and foaming agent is considered to be the one which has the greatest difference with the CRP of the mineral sample. These are isobutyl xanthate and Shell.

Example 2. A sample of ore containing 2.3% lead and 1.7% zinc was taken. Monomineral samples are separated from the two minerals and the DACs of these samples are measured. The DACs of several reagent collectors and foaming agents are also measured. The measured CRC (in mV) of lead sulfide is 243 and that of zinc sulfide is 325. For the reagents to be tested, the CRC (in mV) is: isobutyl xanthate -140;

tertiary amine 210; a mixture of dithiophosphate and xanthate 80; pine oil 290; synthetic oil 120; T66 210.

The results obtained indicate that the best collector of those tested for lead sulphide 10 is isobutyl xanthate, and for zinc sulphide, tertiary amine; the most suitable foaming agent is synthetic oil. For zinc sulphide, the most suitable collector is tertiary amine and a pine oil.

Claims (1)

Claims 1. A method for selecting reagents for collectors and foaming agents in the flotation of non-ferrous metal ores, characterized in that, before conducting the flotation, the contact potential difference (DAC) between the reference electrode and the surface of the mineral and / or individually minerals is measured, contained in the ore, as well as the DAC between the reference electrode and the various reagent-collectors, respectively, foaming agents, and this reagent collector or reagent-foaming agent, which has the largest difference between the values of the DAC, is selected. mineral and reagent.