CS240492B1 - The method of pyroselection of antimony in the processing of complex polymetallic raw materials - Google Patents

Abstract

The purpose of the invention is to prevent the formation of non-volatile antimony oxide compounds in the processes of oxidative roasting and cyclone smelting of complex polymetallic raw materials. The stated purpose is achieved by adding sulfur in the form of copper concentrate, pyrite, pyrite concentrate, other sulfides or elemental sulfur to the processed raw material.

Description

The present invention relates to a method of pyroselection. timon in the processing of complex polymetallic raw materials containing mainly antimony, honey and orthufic components.

At present, complex polythalic raw materials are processed such that mercury is vaporized by oxidative roasting, which escapes from the furnace in gases and is collected in condensation columns. Honey and much of the antimony remain in the eruption. The second stage is treated by a hydrometallurgical or pyrometallurgical process.

The pyrometallurgical can be processed in a copper smelter, where the antimony passes into melting products: media, wreckage slag and flakes from which it cannot be obtained, or the melting is melted in a cyclone furnace where the antimony is distributed among the melting products: copper pellet, slag and drift.

The degree of antimony pyroselection into fumes both in oxidative roasting and in cyclone melting is determined by the oxygen content of the furnace atmosphere.

Increasing the oxygen content in the furnace atmosphere results in a reduction in the degree of antimony pyroselection into fumes, which is related to the transition of volatile antimony oxide to higher antimony oxides or nonvolatile iron antimony and media. The stability of the antimony trioxide in the furnace for the oxidative roasting of complex polymetallic raw materials and the cyclone melting of the oxidation roast is determined by the oxygen content in the furnace atmosphere and requires perfect hermetization of the furnace. In order to maximize the efficiency of antimony pyroselection into the flotation during cyclone melting of oxidation roasters, it is necessary to conduct the oxidation roasting process so as to prevent the formation of ‘non-volatile oxidic antimony compounds in the eruption.

The above-mentioned drawbacks are overcome by the antimony pyroselection in the processing of the complex polymetallic raw materials of the present invention, which provides that by providing 25 to 40 wt% sulfur in the oxidation roasting feedstock and 16 to 40 wt% sulfur in the cyclone melting feedstock, compounds in the oxidative roasting process and in the cyclone melting process.

The sulfur content of 25 to 40% by weight of the raw material for oxidative roasting can be ensured by the addition of sulfur in the form of copper concentrate, pyrite, pyrite concentrate, other sulfides or elemental sulfur. Content. 16 to 40% by weight of sulfur in the cyclone melting feedstock can be provided by suitable oxidizing roasting conditions, or by the addition of sulfur in the form of copper concentrate, pyrite, pyrite concentrate, other sulfides, or elemental sulfur to the processed feedstock. The antimony to the traps from which it can be captured and further processed into a marketable product and the copper product produced contains 0.2 to 0.5% by weight of antimony and possibly in a copper copper smelter, exemplifies the method of the invention to achieve maximum antimony pyroselection efficiency into the copper. fluxes in cyclone melting of oxidative roasters.

He did

Complex polymetallic concentrate of a percentage by weight:

Cu 19.38 Coll 3.75 Hg 2.43 WITH 23.64 Bi 0.31 As 2.10 Fe 23.56

sa homogenised with a copper concentrator of a composition by weight:

Cu 25.65

Fe 29.73

S, 31.62

Sb. 1.40 in such a ratio that a mixed feedstock with a sulfur content of 27.1% was obtained. The raw material was roasted in a multi-deck oven at 700 ° C for 9 hours. The produced frost had a composition in weight%:

Cu 26.17 Coll 2.31 WITH 17.01 Hg 0.015 Bi 0.21 As 1,21 Fe 31.10

The results of X-ray diffraction analysis and X-ray microanalysis did not show the presence of nonvolatile oxidic antimony compounds in the fry. In another operation, the precipitate was melted in a model cyclone apparatus to obtain a copper grit containing 511.32 wt% medium and 0.43 wt% antimony. The degree of pyroselection of antimony to fumes was 94.8%. Example 1 and d 2

Complex polymetallic concentrate of a percentage by weight:

Cu ' 20.21 iSh 10.45 Hg 2.46 WITH 24.7 Bi 0.28

As 2,24

Fe 18.31 was homogenized with the addition of pyrite of 41.9 wt% iron and 48.10 wt% sulfur in such a ratio that a raw material containing 35.2 wt% sulfur was obtained. The raw material was roasted in a multi-deck oven at 600 ° C for 9 hours. The produced frost had a composition in weight%:

Cu 12.80 ‘Sb, 5.10

S, 24.46

Hg 0.013 Bi 0.28 As 0.56 Fe 33.30

The results of X-ray diffraction analysis and X-ray microanalysis did not show the presence of nonvolatile oxidic antimony compounds in the eruption. In another operation, the fry was melted in a model cyclone apparatus; to obtain a copper matte containing 38.21 wt% medium and 0.48 wt% antimony. The degree of pyroselection of antimony into fumes was 92.8%.

Claims (1)

SUBJECT A method of pyroselection of antimony in the treatment of complex polymetallic raw materials, characterized in that a sulfur-containing raw material, in the form of, for example, copper concentrate, pyrite, pyrite concentrate or elemental sulfur, is added to the raw material to be treated by oxidative roasting. OF THE INVENTION in an amount such that 25 to 40 percent by weight of sulfur is present in the mixture, and subsequent cyclone melting treatment, an amount of sulfur-containing feedstock is added to achieve 16 to 40% by weight of sulfur in the feedstock.