RU2333042C1 - Method of flotation of copper-molybdenum ores - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: method of flotation of copper-molybdenum ores includes grinding of ore and collective flotation of copper and molybdenum in alkaline medium formed by lime. Collective flotation is conducted in the presence of collector Aero-MX 3601 and a frothing agent; next the concentrate of collective flotation after operations of thickening and desorbtion with heating the pulp up to 40-60°C by live steam in the presence of sodium sulphide is fed for molybdenum flotation in the presence of collector Aero-MX 3601 with obtaining molybdenum concentrate as a froth product. Molybdenum flotation refuses are delivered for classification. Fine-grained product is fed for slime flotation in the presence of collector Aero-MX 3601 and the frothing agent. Coarse-grained material after re-grinding is delivered for sand flotation in the presence of collector Aero-MX 3601 and the frothing agent. Concentrates of slime and sand flotation are mixed together to obtain copper concentrate and refuses are discharged to a dump.

EFFECT: increase of efficiency and intensification of the process of separation of copper-molybdenum ores.

1 dwg, 1 tbl, 4 ex

Description

The invention relates to mineral processing and can be used for flotation of copper-molybdenum ores.

A known method of enrichment of copper-molybdenum ores, including collective copper-molybdenum flotation in an alkaline environment created by lime. Collective concentrate is treated with oxygen at a temperature of 60-95 ° C, a pressure of 0.05-1.0 MPa and a pH of 11.0; selective flotation of copper-molybdenum concentrate with the release of molybdenum concentrate with the release of molybdenum in the foam product is carried out at pH 6.0-8.0 (RU, patent No. 2038859, CL B03D 1/02, 1990).

The disadvantages of this method are the use of oxygen, an expensive and scarce material, in the desorption operation and the need for increased pressure in the concentrate desorption operation, which also significantly increases the cost of the selection operation.

The closest in technical essence and the achieved result to the proposed one is a method for the separation of copper-molybdenum ores, including grinding of ore and collective flotation of copper and molybdenum in an alkaline environment created by lime (Abramov A.A. Technology of concentration of non-ferrous metal ores. - M .: Nedra , 1983, p.165-171 - prototype).

In the collective copper-molybdenum flotation cycle, kerosene and xanthogenate are used as a collector, and lime is used for pyrite depression. Before the separation of collective flotation, the copper-molybdenum concentrate is concentrated by loading lime to pH 11.5, providing desorption and removal of a significant part of the collector from the surface of the minerals. Stirred for 4-6 hours with the treatment of the pulp with hot steam at a temperature close to boiling and aeration, then selective flotation is carried out (after diluting the pulp with water at pH 8.5-8.8) with the addition of hydrocarbon oil. At the same time, molybdenite is extracted into the foam product, and copper concentrate is obtained with the chamber product.

The disadvantages of this method are the long duration of the oxidative heat treatment of the pulp and, as a result, significant energy consumption and relatively low productivity.

The technical result, the achievement of which the present technical solution is aimed, is to increase the efficiency and intensify the process of separation of copper-molybdenum ores.

The specified technical result consists in the fact that in the flotation method of copper-molybdenum ores, including collective flotation of copper and molybdenum in an alkaline environment created by lime, according to the invention, collective flotation is carried out in the presence of an Aero-MX 3601 collector and a blowing agent, then the collective flotation concentrate after operations thickening and desorption in the presence of sodium sulfide is sent to molybdenum flotation in the presence of the collector Aero-MX 3601 to obtain a molybdenum concentrate as a foam product, and the molybdenum tails of the flotation flotation is sent for classification, the thin product is sent to the slurry flotation in the presence of the Aero-MX 3601 collector, and the molybdenum flotation tailings are sent to the classification, the thin product is sent to the slurry flotation in the presence of the Aero-MX 3601 collector and blowing agent, and the coarse after regrinding, sent to the sand flotation in the presence of the Aero-MX 3601 collector and blowing agent, after which the slurry and sand flotation concentrates are combined into a copper concentrate, and the tailings are sent to the dump.

Figure 1 shows a flow chart of the implementation of the proposed method of flotation of copper-molybdenum ores.

Figure 2 shows the technological scheme of the method of flotation of copper-molybdenum ores described in the prototype.

The experiments were carried out on a sample of copper-molybdenum ore containing 0.50-0.60% copper and 0.018-0.022% molybdenum taken at the quarry of one of the copper-molybdenum plants.

The method is as follows: after grinding the ore in an alkaline medium (pH 9-11) created by lime, to a particle size of 55% class — 74 μm, copper-molybdenum flotation is carried out with the introduction of the Aero-MX 3601 collector. The collective copper-molybdenum concentrate is concentrated to 35% tv and sent to the operation of desorption of the collector with heating the pulp to 40-60 ° C with hot steam in the presence of sodium sulfide (consumption of 5-10 kg / t of product). After desorption, the product is sent to molybdenum flotation. The collector in the latter uses the Aero-MX 3601 collector. The foam product produces a rough molybdenum concentrate that enters the cycle of the same name, and the molybdenum flotation tailings are sent for classification in g / c to obtain fine and coarse products. A thin product is sent to the slurry flotation in the presence of the Aero-MX 3601 collector and blowing agent, and coarse, after regrinding, is sent to the sand flotation in the presence of the Aero-MX 3601 collector and blowing agent, after which the slurry and sand flotation concentrates are combined into a copper concentrate, and tails dumped.

Examples of specific implementation of the described method.

Permanent conditions:

shredding lime up to pH 10.0 agitation MIBK 15 g / t product desorption Na ₂ S 10 kg / t slurry copper flotation product Lime MIBK up to pH 10.0 10-15 g / t sand copper flotation product. Lime MIBK up to pH 10.0 10-15 g / t

Example 1 (by the method of the prototype).

The initial feed - copper-porphyry ore - is subjected to flotation processing according to the scheme of figure 2 with a reagent regime shown in constant conditions and in the table. In the desorption operation, the steaming temperature is 70 ° C.

Example 2 (by the proposed method).

The initial feed - copper-porphyry ore - is subjected to flotation processing according to the scheme of figure 1 with a reagent mode shown in constant conditions and in the table. In operations of the main collective, molybdenum, copper slurry and sand flotation, the collector Aero-MX 3601 is introduced. In the desorption operation, the steaming temperature is 40 ° С.

Example 3 (by the proposed method).

The initial feed - copper-porphyry ore - is subjected to flotation processing according to the scheme of figure 1 with a reagent mode shown in constant conditions and in the table. In operations of the main collective, molybdenum, copper slurry and sand flotation, the collector Aero-MX 3601 is introduced. In the desorption operation, the steaming temperature is 60 ° C.

Example 4 (by the proposed method).

The initial feed - copper-porphyry ore - is subjected to flotation processing according to the scheme of figure 1 with a reagent mode shown in constant conditions and in the table. In operations of the main collective, molybdenum, copper slurry and sand flotation, the collector Aero-MX 3601 is introduced. In the desorption operation, the steaming temperature is 50 ° C.

As the studies showed, only such a combination of flotation operations and the corresponding reagent modes allows the most efficient flotation of copper-molybdenum ores. When processing according to the proposed scheme, high-quality copper and molybdenum concentrates are obtained. Thus, to increase the intensity and efficiency of the flotation process of copper-molybdenum ores, it is necessary to use the Aero-MX 3601 collector, which allows to increase copper recovery from 6 to 8%, and molybdenum by 10-12% in concentrates of the same name by eliminating the finishing flotation operation and, accordingly, lapping tails.

Summary indicators of the flotation of copper-molybdenum ores clearly showed that the use of the proposed method in comparison with the prototype allows you to:

- reduce the temperature of the oxidative heat treatment of the pulp and, as a result, reduce energy consumption;

- increase efficiency and intensify the process of separation of copper-molybdenum ores;

- increase the extraction of metals in the same concentrates.

No pp Product name Exit, % Me content,% Extraction Me,% Test conditions Cu Mo Cu Mo one 2 3 four 5 6 7 8 one Mo concentrate 6 refining 0.02 5.20 50,4 0.20 42.00 according to the prototype consumption of butyl xanthate 30 g / t diesel fuel 500 g / t product Cu concentrate 1.83 24.01 0.12 82.90 9.15 Tails 1 94.00 0,065 0.009 11.53 35.25 Tails 2 4.15 0.69 0.08 5.37 13.60 Ore 100.00 0.53 0.024 100.00 100.00 2 Mo concentrate 4 purifications 0.024 3,50 50,2 0.15 57.37 according to the proposed method, the consumption of Aero MX 3601 in the collective cycle of 10 g / t in the selection cycle of 200 g / t in sludge copper flotation of 15 g / t of product; in sand copper flotation 10 g / t of product Cu concentrate 2 refining 2.04 24.05 0.09 89.20 8.74 Tails 95.30 0.06 0.006 10.40 27.23 Copper cycle tails 2.64 0.05 0.05 0.25 6.66 Ore 100.00 0.55 0,021 100.00 100.00 3 Mo concentrate 4 purifications 0,026 3.40 50.06 0.17 56.59 according to the proposed method, the consumption of Aero MX 3601 in the collective cycle of 10 g / t in the selection cycle of 200 g / t in sludge copper flotation of 15 g / t of product; in sand copper flotation 10 g / t of product Cu concentrate 2 refining 1.91 24.10 0.1 86.85 8.30 Tails 94.80 0,068 0.0065 12.16 26.79 Copper cycle tails 3.26 0.13 0.06 0.82 8.31 Ore 100.00 0.53 0,023 100.00 100.00 four Mo concentrate 4 purifications 0,023 2.90 50.15 0.13 52,43 according to the proposed method, the consumption of Aero MX 3601 in the collective cycle of 10 g / t in the selection cycle of 200 g / t in sludge copper flotation of 15 g / t of product; in sand copper flotation 10 g / t of product Cu concentrate 2 refining 1.97 24.00 0.1 89.21 8.95 Tails 93.60 0.056 0.006 9.89 26.80 Copper cycle tails 4.41 0.09 0.06 0.78 11.81 Ore 100.00 0.53 0,022 100.00 100.00

Claims (1)

A method of flotation of copper-molybdenum ores, including grinding ore and collective flotation of copper and molybdenum in an alkaline environment created by lime, characterized in that collective flotation is carried out in the presence of an Aero-MX 3601 collector and a blowing agent, then a collective flotation concentrate after thickening and desorption operations with by heating the pulp to 40-60 ° C with hot steam in the presence of sodium sulfide, they are directed to molybdenum flotation in the presence of the Aero-MX 3601 collector to obtain a molybdenum concentrate as a foam product, and the tails can be of libdenite flotation is sent for classification, and a thin product is sent to sludge flotation in the presence of the Aero-MX 3601 collector and blowing agent, and coarse after regrinding is sent to sand flotation in the presence of the Aero-MX 3601 collector and blowing agent, after which the slurry and sand flotation concentrates are combined into copper concentrate, and the tailings are sent to the dump.

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