Method of flotation separation of black jack and copper mineral from iron sulphide. RU patent 2504438.

FIELD: process engineering.

SUBSTANCE: invention relates to flotation extraction of sulphide minerals from concentrates and can be used in flotation concentration of sulphide copper-zinc pyrite- and pyrrotine-bearing polymetallic ores. Proposed method comprises conditioning of mineral suspension in the presence of complexing collector and complexing regulator, adding foaming agent and extraction of said sulphide minerals into foam product of flotation. Complexing zinc- and copper-selecting agent represents 1-phenyl-2,3-dimethyl 4-dimethylaminopyrazolone-5 that can form sold bond with said metals. Complexing regular represents ammonium thiocyanate or its mix with acetic acid, or copper sulphide. Complexing collector-to-complexing regulator ratio makes 1:0.25-1:3.

EFFECT: higher efficiency of separation.

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The invention relates to the field of mineral processing, in particular, to allocation of sulphide minerals, concentrates and can be used in the flotation enrichment of sulfide copper-zinc, pyrite and and polymetallic ores.

There is a method of flotation using as a collector of non-activated sphalerite insoluble xanthogenates higher alcohols [Fundamentals of theory and practice of flotation reagents. S.V., L.Y. and other M, Nedra, 1969 .273].

The disadvantage of this method is low extraction of the valuable component in concentrate, low selectivity index, high consumption of flotation reagents and high losses of metal with final tailings.

There is a method of enrichment of sulfide ores, including the introduction of the modifier surface sphalerite to increase sorption xanthate, the introduction of a header and a blowing agent [Bogdanov O.S, A.I. Maksimov, A.K., Janis N.A. Theory and technology of flotation of ores. - M, Depths. 1980. - .363.].

The disadvantage of this method is the following. In this method as an agent that modifies the surface, use copper sulphate. Department of sphalerite of iron minerals is carried out in strongly alkaline lime environment, and strictly control the flow of copper sulphate to reduce unproductive consumption xanthate.

There is a method of flotation of polymetallic ores, including the introduction of the modifier surface sphalerite, xanthate and additional collector (obtained on the basis of the mother liquor production xanthate and propylene oxide), which is the foaming ability [Ivanova T.A., Zaslavskaya N.N., V.I. synthesis, properties and application of the new flotation reagent. // Metallurgical technologies in processing of ores and concentrates of non-ferrous metals: Nauch. works Gintsvetmet - M, 1993. P.119-123. A.S. №1457232 USSR and A.S. №1640868 the USSR].

As an additional collector use reagent obtained on the basis of the mother liquor production of butyl xanthate and propylene oxide. The method allows to exclude from the flotation process expander and to increase the extraction of copper and zinc. However, for production of reagent you must use a production waste of xanthate with a steady line up.

Closest to the technical nature, the totality of symptoms and the achieved result can be recognized method of flotation of copper-zinc sulphide ores in strongly alkaline lime environment including the introduction of copper sulphate, air-conditioning pulp with butyl xanthate and (L.Y. , S.I. Ivankov, N.K Shcheglova Flotation reagents in the process of enrichment of mineral raw materials. Book 2, .165).

This method has the following disadvantages: separation efficiency essentially depends on the presence of impurities in the partial minerals, is low and the extraction of the valuable component in concentrate, low selectivity index, high consumption of flotation reagents, high losses of metal with final tailings.

The aim of the invention is to develop effective ways of branch of sulphide minerals zinc and copper sulphides of iron of the copper-zinc or of polymetallic ores and products of enrichment.

This goal is achieved by the provision of a selective separation of valuable components in concentrate at simultaneous reduction of irretrievable losses of valuable components with common tails in the presence of reagent-collector of selective zinc and copper, regulator of complexing and to the expander.

To achieve this goal using the proposed method of flotation separation of sphalerite and copper minerals from iron sulfides, including air conditioning crushed pulp with a regulator of chelation collector, selective of zinc and copper, and , and the allocation of zinc concentrate in the foam flotation product, and as a regulator, chelation used rhodanates ammonium combination of ammonium thiocyanate solution of acetic acid or added copper sulfate. As a collector of use 1-phenyl-2,3-dimethyl 4--5. As an additional collector use BCS or any collector. In a preferred embodiment, the implementations use ratio collector, ammonium thiocyanate component 1:0,25 to 1:3 the developed method should be applied to the pulp particle size (-0,1 mm).

When realization of the method of use:

- 1-phenyl-2,3-dimethyl 4--5 (AMD)obtained on the basis antipirina, introduction in his molecule at the position 4 . The initial product for synthesis antipirina use:

- ether and phenylhydrazine;

- added copper sulfate (CuSO 4 ) GOST 26319-84;

- rhodanates ammonia (NH 4 CNS) GOST 27067-86 or rhodanates sodium;

- acetic acid (CC) GOST 18270-72;

- () collector

- butyl potassium xanthate (BCS); relevant (GOST 7927-75) or other sulfhydryl collectors.

- foaming agents: Pine oil GOST 6792-74, or (MIBC) TU 6-02-891-78.

Selectivity of 1-phenyl-2,3-dimethyl-4--5, in alkaline based on the ability to education is difficult soluble complex compounds of zinc, Zn (13 C H 17 ON 3 ) 2 (NCS) 2 or compounds with copper on the surface of sulphide minerals and simultaneous capacity of 4-dimethylamino-1, 5-dimethyl-2--3-she oxidize the iron ions (3+) to form on the surface of pyrite hydrophilic product of oxidation - 2-(2-acetyl-2-methyl-1-)-N,N-dimethyl-2-.

Introduction regulators chelation rhodanates ions combination rhodanates ions with acetic acid and sulphate of copper leads to the formation of more stable complex compounds AMD-1-phenyl-2,3-dimethyl 4--5), with zinc and stronger hydrophobization of surfaces sphalerite. Introduction of copper sulfate before collector leads to simultaneous formation of 1-phenyl-2,3-dimethyl-4--5 with zinc and copper on the surface of sphalerite.

For the implementation of the flotation separation and pyrite in laboratory conditions using laboratory mechanical , in industrial environments can be used of any type.

To confirm the efficiency of the developed method was undertaken to compare it with the way chosen as a prototype.

The experiments were conducted on the above-mentioned laboratory equipment with the use as a blowing agent used minerals have been ground down to (-0,08+0,044 mm).

The necessary size of the receive abrasion minerals porcelain mill for dispersion on the classes on the screens.

1. By the method prototype (experience 1 in the table). It crushed mineral pyrite, sphalerite or (1 gram) were placed in the flotation cell, poured water solution pH 10,5 (Cao); introduced CuSO 4 400 g/t, then pulp with collector BCS 100 (g/t), served expander MIBC, mixed 0,5 minutes, then within 5 minutes.

2. The developed technique (experiments in table 2-5) Sample crushed mineral pyrite, sphalerite or (1 gram) were placed in a flotation chamber, filled in with water pH 10,5 (Cao), introduced collector of AMD 50, 100, 300 and 500 (g/t) and pulp with collector 1 min, served expander MIBC, mixed 0,5 minutes, then for 5 minutes.

3. The developed technique (experiments in table 6), but before the filing of a collector AMD-100 g/ton) was administered regulator uSO 4 400 g/T.

4. The developed technique (experiments in table 7-10), but simultaneously with collector AMD-100 g/ton) was administered regulators chelation rhodanates ammonium NH 4 SCN and acetic acid (CC) in the molar ratio of AMD: NH 4 SCN: the criminal code of 1:2:2 to 2:0,5:0

5. The developed technique (experience 11 in the table), but simultaneously with collector AMD-100 g/ton) was administered regulators chelation rhodanates ammonium NH 4 SCN and acetic acid (CC) in the molar ratio of AMD: NH 4 SCN: the criminal code of 1:1:1 and when you add collector BCS 10 g/T.

Analysis of the table data shows that the best conditions for separation of pyrite and sphalerite by the proposed method are the terms of experience 11 and experience of 6. In the absence of a regulator chelation (experience 7-9) extraction of sphalerite at a cost of AMD 50-500 g/t does not exceed 41%, the extraction of pyrite <3%. The developed method allows to provide the difference in the extraction of minerals are pyrite and sphalerite 2.5-13% compared with the method of the prototype.

Method of flotation separation of sphalerite and copper minerals from iron sulfides, including air conditioning mineral suspension in the presence of collector and regulator of chelation introduction of the expander and the allocation of sulphide minerals zinc and copper in the foam flotation product, wherein as selective reagent to zinc and copper using 1-phenyl-2,3-dimethyl 4--5, capable to education lasting connection with these metals, and as a regulator of chelation used rhodanates ammonium or its mixture with acetic acid or added copper sulfate, the ratio of the collector and the regulator chelation is from 1:0,25 to 1:3.