SU926045A1 - Method for processing chalcopyrite-containing copper ores and concentrates - Google Patents

Description

(5) METHOD FOR PROCESSING CHOLKOPIRITIS-CONTAINING COPPER ORES AND CONCENTRATES

The invention relates to non-ferrous metallurgy, in particular to the sposvam processing of copper-zinc ores and concentrates using roasting and sulfatization.

There is a method of processing chalcopyrite-containing copper ores and concentrates, including oxidative roasting, sulphatisation of the product of oxidative roasting with sulphate SOFOR, heat treatment of the granulated sulphated product and leaching it D.

The disadvantage of this method is the low degree of sulfatization due to ferrite formation.

The purpose of the invention is to increase the recovery of copper into the solution during leaching.

The goal is achieved by the fact that according to the method of processing chalcopyrite-containing copper ores and concentrates, including oxidative roasting, the product is sulphatized

2

oxidizing roasting with sulphate solution; heat treatment of granulated, sulphated product and its leaching; a waste solution from oil refining containing up to 90 sulfuric acid and petroleum sulphides is used as a sulfatization agent.

When eton sulfatization is carried out at 120-1 0 C at the consumption of sulfatization

1 "20-30% by weight of solid.

The essence of the method is as follows.

The oxidizing roasting product is treated with waste sulphate extract containing high boiling fractions of petroleum sulphides and 80-90% I (jSO (refinery waste) at 120-1 ° C and consumption. 20-30% by weight of solid. Sulfate-treated granules then calcined in furnaces KS at 500-600С.

In the process of calcination, along with other reactions, an additional reduction of acidification of copper compounds, including ferrite, occurs, with the formation of cuprite and metallic copper, which are then sulfated. Thus, when used as a sulfatizing agent, a sulfate solution containing petroleum sulfides along with sulfuric acid, the efficiency of sulfatization of complex copper sulfides, which are prone to ferrite formation, increases markedly. When leaching the product of calcination at 500–600 ° C with acidified chloride solution, it was possible to transfer copper to 96–98, zinc and 92–95%, and lead to 98%. The resulting filtrate is reduced, for example, with copper sulphides, cement copper, etc. for transferring the main part of copper ions to the univalent state. Monovalent copper chloride complexes are extracted with tributyl phosphate, which has a significant capacity (50-60 g / l of copper). After separation of the phases, the raffinate is directed to the cementation of lead, for example, with zinc dust, chips, etc., and the zinc is extracted from the depleted solution in three to four stages .. The demetallized solution is rec; I irradiate to the leaching stage. Example. Optimal process parameters are investigated in laboratory.

one.

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thirty

91.3 93.8 93.2

96.8 98.2 9.6

Claims (2)

9.3 98.8 98.6 96.3 5 torus conditions on the concentrate composition,%. Si 18.5; Zn 12.25; Pb 0, Fe 33.8; S 36.1. Concentrate contains,%: chalcopyrite and covelline about C0 sphalerite 20; pyrite 20; non-metallic minerals rest. 300 g of concentrate are calcined at 800 ° C for 3 hours to a sulfur content of less than 1%. The composition of the candle is controlled by chemical, X-ray, crystal (by choptic analyzes. At 800 ° C, the candle practically does not contain sulphides. All copper and zinc are bound to oxides and ferrites. 2Q g of oxidized candle residue is treated with sulfuric acid solution of sulphides at different consumption of sulfatizer and temperatures 120-140 ° C. After that, the sulfated pellets are calcined in an oven at 600 ° C. The sulfatization and calcination product is leached out with an acidified chloride solution at room temperature for 2 hours. a and lead into solution, on average, 98.6; 92.5 and 98.8%, respectively. The effect of the sulfatizer consumption and the temperature of treatment with sulphate solution on copper extraction into the solution is shown in table. As follows from the given data, the optimal conditions for the reduction process An eradiation sulphate can be considered as a consumption of sulphate solution of oil sulphides 20-30% by weight of solids and a processing temperature of 120-lAO C. The method is applicable in the technology of hydrometallurgical processing of sulphide concentrates of non-ferrous metals. Claim 1. Method for processing chalcopyrite-containing copper ores and concentrates, including oxidative roasting, sulphatisation of an oxidative roasting product with a sulphate solution, heat treatment of the granulated sulfated product and its elimination, so that - increase of copper recovery into the solution during leaching; a waste solution from the processing of petroleum products containing up to 90% sulfuric acid and petroleum sulfides is used as a sulfatizing agent. 2. The method according to P-. 1, about t l and h and and and the fact that sulfatization is carried out at 120-1 with the consumption of sulfatizing 20-30% by weight of solid. Sources of information taken into account during the examination 1. Snnikov L.P., Yurenko V.N. Processing of copper-zinc ores, Ivetnaya Metals, 1965, 11, p. 77-80.