SU1521786A1 - Method of isolating copper from circulating solutions - Google Patents

Abstract

FIELD: non-ferrous metallurgy and mineral fertilizer industry. The purpose of the invention is to increase the direct extraction of copper, reduce the degree of absorption of impurities and reduce the cost of the process. A method for extracting copper from circulating solutions, for example, a solution for removing pyrite ogarkes, includes neutralizing the solution with a reagent containing calcium oxide or carbonate, sorption of copper from the pulp on aminocarboxylic ampholytes in a series of sorbent sorbents installed in series from the last sorbent. first pachuka. After neutralization, the pulp is divided into streams, the number of which is equal to the number of sorption apparatus, is fed simultaneously to each pack and taken simultaneously from each pack to the circulation system. 1 tab.

Description

The invention relates to non-ferrous metallurgy and industry for the production of mineral fertilizers and can be used, in particular, in recovering copper from circulating solutions of hydraulic removal of piter ogarkov.

The aim of the invention is to increase the direct extraction of copper, reduce the degree of absorption of impurities and reduce the cost of the process.

Example: Sorption extraction of copper from a solution of pedogenesis of pyrite butts using known and proposed methods.

The chemical composition of the solution, g / l: copper 0,8; zinc 4.58; mouse to 0.17; iron total 2.2; iron (III) 2.1; Calcium 0.35; pH of the solution is 2.6.

Conducted four comparative

experiments, of which experiment 1 was carried out according to a known method, while neutralizing the initial solution with lime to a pH value of 4.2, and experiments 2-4, according to the proposed method. Experiments 2-4 differed in the neutralization pH of the initial solution (4.0.4.2, 4.5).

Sorption of the mixture from the pulp was carried out in a laboratory setup.

ate tc

sj

and about:

consisting of six successively installed apparatus - spiders, Fig. 1 and 2 show diagrams of spiders.

When conducting experiment 1 (by a known method), 1200 ml / h of pulp was supplied to the first device, and 20 ml / h of the amino-carboxyl ampholyte ANKB-35 was fed to the last device. Spent pulp (1200 ml / h) was withdrawn from the sixth apparatus, the full sorbent was removed from the first apparatus (its volume at saturation decreased

chalets up to 19.5 ml / h), 1

The conditions of sorption: the number of steps 6; ratio of pulp and sorbent flux 1200; 20 60: 1; the duration of the contact of the pulp and the sorbent in the capping apparatus is 1 hour; the volume of pulp and sorbent in each apparatus 1200 + 20 1220 ml; volume of yulpa and sorbent supplied for separation

on the grid in each device, 1200 + 20 1220 ml / h.

When conducting experiments 2-4 (according to the proposed method), the pulp after neutralization (1200 ml / h) was divided into 6 portions, 200 ml / h were fed into each apparatus and 200 ml / h were withdrawn from each apparatus. Sorbent ANKB-35 (20 ml / h) was applied to the last apparatus. Saturated sorbent (at 19.5 ml / h) was removed from the first apparatus.

Conditions of sorption: the number of steps 6; the ratio of the flow of the pulp and the sorbent is 1200: 20 60: 1, the residence time of the sorbent in each apparatus is 1 hour; the volume of the pulp and sorbent in each apparatus is 200 + 20 220 ml; the volume of the pulp and sorbent, preferably for separation into a mesh in each apparatus, 200 + 20 220 ml / h.

The results of the experiments after the process has reached the steady state mode are presented in the table.

Indicators of experiments on the extraction of copper from the circulating solution of hydrolysis of pyrite ogarkov

Indicator

pH of the pulp after neutralization.

Lime consumption for neutralization of the solution, kg / m Ratio of pulp and sorbent fluxes entering and at the sorption unit, Ratio of pulp volumes

and a sorbent in caustic sorbch / 3 column apparatus, .m

PH value at sorption.

Extraction of copper on the sorbent,%

Content in a saturated sorbent, g / l:

Copper

Mouse to

Iron

Calcium

Content., Experience

ilTIEIIiZI

4.2

4.0 .4.2 4.5

5.3 4.8 5.3 6.0

60

60

60

60

10, 7

10 3.8

ten . 4.3

54.8 59.9 55.3 55.0

27.0 29,527,227,1

0.10.0050.0040.001

3.0 0.60.50.2

0.90,60,60,6

Space required

nets for dividing

pulp and sorbent,

unit

Sorption capacity

devices, used units

It follows from the table that, in the pr-unit method, as compared with the known, direct extraction of copper will increase by 0.2–5.1% (in comparable conditions of experiments 1 and 3 - by 0.5%). The mouse's sorbability decreases by 20-100 times, iron - by 5-15 times, calcium - by 1.5 times,

The advantage of the proposed method is a significant reduction in capital investment and operational costs due to a 5.5-fold decrease in the volume of sorption equipment and the size of the separation nets, which makes the process cheaper.

Thus, the proposed method provides increased direct copper recovery and process selectivity, as well as reduced capital investment and operating costs.

X

X

Table continuation

5.5 1.0 1.0 1.0 5.5 1.0 1.0 1.0

 -. y, xy-1.G, .-, AI .------ -

Claims (1)

Invention Formula A method of extracting copper from circulating solutions, mainly a solution of hydro-removal of pyrite ogarkov, including neutralizing the solution with a reagent containing calcium oxide or carbonate, sorption of copper on aminocarboxylic ampholytes in a series of successively installed sorption packs, when applying regenerated sorbent to the last spider and output saturated sorbent from the first pack, desorption of copper from the saturated sorbent and processing of the eluate, characterized in that, in order to increase the direct extraction of copper, voltage degree of absorption of impurities and reduce the cost of the process, the pulp, after neutralization, is divided into streams equal to the number of sorption Pachuca simultaneously fed to each Pachuca and output simultaneously circulating in the system. X X X  T IL 2