SU1458405A1 - Method of desorption of copper and nickel from cationite - Google Patents

Abstract

This invention relates to hydrometallurgy of non-ferrous metals, and specifically to methods for desorbing copper and nickel from cationite. The purpose of the invention is to increase productivity and reduce the cost of the process. The desorption of copper and nickel from the cation exchanger is carried out, passing cyclically sulfuric acid solutions with a concentration difference of 80-292 g / l through a layer of saturated cation exchanger, with the consumption of each solution per cycle being 0.05-0.6 specific volumes for the number of cycles 1-12. I z.p, f-ly, table 2.

Description

The invention relates to hydrometallurgy of non-ferrous metals, and specifically to methods for desorbing copper and nickel from cationite,

The purpose of the invention is to increase productivity and reduce the cost of the process.

Example 1. Desorption of copper and nickel from cation exchanger in a known manner.

Desorption was carried out in a column with a KU-2 grade sulfonic cation exchanger layer (GOST 20289-74) equal to 4 m. The capacity of the cation exchanger was mg / g: copper 61.95i nickel 37.17; a total of 99.12. A solution with a constant content of sulfuric acid was fed into the column, its consumption was determined for complete metal removal from the cation exchanger and water consumption for displacing the sulfate eluate from the column to acidity pH 7, At the outlet of the column

determine the volume of sulphate eluate, the content in the eluate of copper and nickel. Based on the analysis data, the consumption of sulfuric acid per I g of metal (copper and nickel in total), the productivity of the process by metal (copper and nickel in total) and the economic effect (by the difference in the cost of metals and acid) were calculated.

The results are presented in table 1. According to the data obtained, the most economical option is desorption with a solution of 314.55 g / l of sulfuric acid, which combines the average consumption of sulfuric acid, the productivity of the process and the volume of eluent. With increasing acid concentrations up to 427.2. g / l increases the productivity (due to a decrease in the volume of eluent) to 520.9 g of metal / kg of ion exchanger per day, as well as the consumption of acidic

D

00

th

You are up to 11.85 g / g metal. With a decrease in the concentration of the sulfuric acid to 202.59 g / l, the productivity decreases to 432.5 g / kg per day and the consumption of acid to 8.69 g / g of the metaball.

Example 2, Desorption of copper and nickel from the cation exchanger by the proposed method.

Desorption was carried out under conditions similar to those described for Example 1, except that a solution with a varying concentration of sulfuric acid was supplied to the column.

A small volume of solutions that are mixed during desorption, in the second case, an insignificant concentration difference. The upper limit of the difference in concentrations of sulfuric acid is set at 292 g / l. Increasing it to 310.7 g / l provides some cheaper process and by reducing the consumption of sulfuric acid, but does not meet the safety regulations. The latter is caused by the fact that when the acid concentration is higher than 460 g / l there is a danger of blasting the column

you are from the minimum (159.05-284.36 g / l) 15 as a result of the swelling of the resin at

to a maximum (344.76-469.75 g / l), while the concentration difference in one cycle was 60., 4-310, 7 g / l, the average concentration of the solution in the cycle was 314, 4-31 4.62 g / l, the volume of solutions with a minimum. (bottom) and maximo1Sh-. Noah (top) concentrations in each cycle were 0.06-1.2 beats .-- Sat. the volume of the concentration solution was two times smaller, 0.03-0.6 beats, vol., the total number of cycles varied from 1 to 20. The results are presented in table 2.

25 provides, in comparison with the known, the following advantages: an increase in productivity up to 540.7 g / kg per day, 5.13 by a known method, or by 5.3%; Reducing the cost according to the data obtained, the cs-treatment of the cation exchanger of the solution is 30 processes per 05.02 rubles / kg per day or with a sulfur concentration difference of 6.6%; the concentration of e, luata and a decrease in its volume to 1.44 beats. against 1.58 by a known method, or by 8.9%.,

acid 80,74-292,6 g / l with the consumption of each of. solutions on one cshc: 0.05-0.6 and the number and, shslov 1-12

provides povpiey) of the driver-35 l

up to 528.7-540.7 g of metal / kgU

ionite per day, concentration of the eluate by reducing its volume to 1.44-, 5, spr. about, increasing the efficiency of the process of 0.645 rubles / kg 40 saturated cationite and washing the ionite per day.

An increase in the number of cycles above 12 leads to a deterioration of the desorption process as a result of leveling the acid concentration. Two solutions of sulfuric acid are allowed to start.

Moreover, in order to increase the productivity and reduce the cost of the process, through a layer of cation exchanger cyclically with a concentration difference of 80-292 g / l, 2, the method according to claim 1, which differs and one cycle is 0.05-0.6 specific volumes with the number of cycles 1-12.

the logical effect of ng-sheltering of the concentration of solutions with M1 shim. and a similar acidity is observed with a decrease in the concentration difference below 80.74. The leveling effect of whipping in the first case is the supply of solutions or washing in the space of the vessel. Avoidance of explosion may be possible by reducing the process rate to 1.36 m / h, however, this leads to a decrease in productivity by 2 times, which is significantly lower than that achieved by a known method.

Using the proposed method of desorption of metals with cation exchanger

provides, in comparison with the known, the following advantages: an increase in productivity up to 540.7 g / kg per day, 5.13 by a known method, or by 5.3%; cheaper process for 05.02 rubles / kg per day or 6.6%; the concentration of e, luata and a decrease in its volume to 1.44 beats. against 1.58 by a known method, or by 8.9%.,

the invention

1. The method of desorption of copper and nickel from cation exchanger, including the filtration of a solution of sulfuric acid through a layer

saturated cation exchanger and flushing

let two solutions of sulfuric. acids

Moreover, in order to increase productivity and reduce the cost of the process, through the layer of cation exchanger two solutions of sulfuric acid are cyclically passed 45

50

with a concentration difference of 80-292 g / l, 2, the method according to claim 1, which differs by the fact that the consumption of each of the solutions for one cycle is 0.05-0.6 specific volumes with the number of cycles 1-12 .

Spreadsheets

Claims (2)

Claim 1. A method for desorption of copper and nickel from cation exchange resin, comprising filtering a solution of sulfuric acid through a layer of saturated cation exchange resin and washing with water ^ characterized in that, in order to increase productivity and reduce the cost of the process, two solutions of sulfuric acid with a concentration difference of 80 are cyclically passed through a layer of cation exchange resin -292 g / l. 2. The method of pop. ^ characterized in that the flow rate of each of the solutions per cycle is 0.05-0.6 specific volumes with the number of cycles 1-12. Table I A. T Taken away Stock solution Eloat Kontentoatsyaya . g / l Volume, specific volume Sulfuric acid consumption, g / g metal Production - 'Cost The cost of metals _} rub / kg of ion exchanger per day Economic effect, rub / kg of ion exchanger per day Concentrate> valuable sulfuric acid, g / l Volume> specific volume body weight, g metal / / kg -ionite per day sulfuric acid, rub / / kg iocta per day copper Inc spruce 202.59 1, 70 ) 18 7.08 2.10 8.69 432.5 0.1 35 0.403 0.268 314.55 1.20 15.68 9.41 1,58 9.52 513.5 0.176 0.48 0,303 427.2 1.10 16.09 9.65 1,54 11.85 520.9 0.222 0.486 0.264 t table 2 Stock solution Sulfuric acid concentration a tccle ^ g / l ^ Maxi Mal-, on me Minimum Medium • 1 'Concentration difference Volume 06sky (Kol, UD.O & ._____ ί »0 I One I Everyone! ^qi * · cycle; raster; < on I cycle! ! Eluate Concentration __ ^ Ζΰ — ’ί ____ Copper j Nickel Volume, specific volume j Consumption .Proevo 'sulfuric I acid g / g metal Duration, g metal / / kg ion exchanger per day Economic effect, rub / / kg of ion exchanger per day 1__ I 202.59 427.2 314.69 224.61 1.20 0.06 0,03 20 15.69 9.41 1, 58 9.52 513.5 0,303 2 202.59 427.2 314, b9 224.61 1.18 oh 1 0.05 12 16.52 9-, 91 1, 50 9.37 528.7 0.314 3 202.59 427.2 314.69 224.61 1.14 .0,2 0.1 6 16.74 10.05 1, 48 9.05 532.6 0.323 4 202.59 427.2 314.69 224.61 1.20 0.6 0.3 2 17.21 10.33 1, 44 9.52 540.7 0.318 5. 202.59 427.2 314.69 224.61 1, 20 1,2 0.6 1 17.21 10.33 1, 44 9.52 540.7 0.318 6 284.36 344.76 314.56 60,4 1, 20- 0.2 0.1 6 15.68 9.41 1,58 9.52 513.5 0,303 7 274.07 354.81 314.44 80.74 1, 14 0.2 0.1 6 16.74 '10, 05 1.48 9.04 532.6 0.323 8 168.31 460.91 314.61 292.6 1.14 0.2 ' 0.1 6 16.74 10.03 1.48 9.05 532.6 0.323 9 159.05 469.75 314.4 310.7 1.18 0.2 0.1 6 15.68 9.41 1,58 9.36 513.5 0.606