SU1397527A1 - Method of extracting manganese from zinc-containing solutions - Google Patents

Abstract

The invention relates to non-ferrous metallurgy and can be used in the hydrometallurgical production of zinc to produce zinc sulphate. The purpose of the invention is to increase the degree of purification of the solution from manganese. Purification of zinc electrolyte from manganese is carried out by treating the solution with ammonia or ammonium hydroxide at pH 5.4-7 and a temperature of 20-55 ° C. Precipitated zinc hydroxosulfate is subjected to an aqueous solution in the presence of oxygen at pH 8 -11 and a temperature of 60-100 ° C and dissolved in sulfuric acid. Zinc hydrosulfate, zinc hydroxide or zinc oxide in an amount of at least 3 g / l is added to the resulting solution containing manganese. 4 tab. (L

Description

with

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vl ate ca

H

The invention relates to non-ferrous metallurgy and chemical technology and can be used in the hydrometallurgical production of zinc and the production of zinc sulphate,

. The purpose of the invention is noBbrojeuHe degree of purification of the solution from manganese,

Example 1, K4l neutral zinc electrolyte composition, g / l zinc 130i magnesium 7.2 e manganese 8.4 potassium 2.49; sodium 4.0, add 1 l of a 25% aqueous solution of ammonium hydroxide for 2 hours at

7.0; 8.0.v 9.5 11 and 11.5. The air consumption for oxidation is kept constant at 2 L / 1PCS per .1 l pullet. The required pH value of the pulp is created by adding ammonium hydroxide. The duration of washing is 3 hours. The pulps are filtered after washing. P-1 hardwood sediments with zinc sulphate, having a color from white to dirty brown depending on the pH of laziness, are dissolved in an aqueous solution of sulfuric acid (g / l) to a residual solid content of 4 g / l. After

Achieve a slurry pH of 7.0. A precipitate filter of stirring for 0.5 h is solid. The degree of purification from magnesium is separated from the sulfate solution.

0

7.0; 8.0.v 9.5 11 and 11.5. The air consumption for oxidation is kept constant at 2 L / 1PCS per .1 l pullet. The required pH value of the pulp is created by adding ammonium hydroxide. The duration of washing is 3 hours. The pulps are filtered after washing. P-1 hardwood sediments with zinc sulphate, having a color from white to dirty brown depending on the pH of laziness, are dissolved in an aqueous solution of sulfuric acid (g / l) to a residual solid content of 4 g / l. After

5 stirring for 0.5 h the solid phase is separated from the sulfate solution

manganese at the stage of deposition of zinc hydroxulphate is 99, and 9.2.5%, respectively. The precipitate is pulverized in water while being washed for. 0.5 hours, Filtered and divided into five parts. Each flitter z.apivayut water in the ratio of W: T-4: 1 and are rinsing in the presence of oxygen in the air at and the value of RP

7.0

93.0

8.0

95.5

It follows from the above dash-PMH that washing the sludge of zinc hydroxosulfate at a pH of 8-11 ensures a higher degree of purification of manganese from 92.5 to 95; 3-97.3%; pH values.

 EXAMPLE 2 To a 2 liter of a neutral dinic electrolyte of the said compound, 0.5 l of ammonium hydroxide is added over 2 hours at 50 ° C. The final pH of the pulp is 7.0. The degree of purification from manganese and magnesium is 90.5 and 98.9%, respectively. After filtration, the precipitate of zinc hydroxysulfate is dispersed with water, washed for 0, 5 hours, {} poured and divided into four parts. Every portion is poured

thirty

93.6

60

97.3

Thus, carrying out the washing of the zinc hydroxosulfate precipitate in the presence of air oxygen at 60–100 ° C increases the degree of purification from manganese from 90, 5 to 97.3–98%.

zinc by filtration, the resulting solutions (clear and colorless) are evaporated to dryness. The composition of the purified zinc sulfate solutions, depending on the pM oxidation, is given in Table 1,

As a result of zinc hydroxosulphate precipitation in the presence of oxygen, the degree of purification from manganese is

9.5

P

And, 5

96,8

97.3

97.4

five

0

five

water is washed and rinsed in the presence of oxygen at a value of rp 11 and temperatures of 30, 60j80 and. The flow rate is 2 l / l pulp min. The duration of the oxidation of 3 hours. The pulps are filtered. 5 precipitates of zinc hydroxosulfate are dissolved in sulfuric acid (g / l) and 5 g / l of zinc oxide are added to the solutions. After stirring for 0.5 h, the solid phase is filtered.

The composition of the purified solution of sulfate p, Inca, depending on the temperature of leaching is given in Table 2.

The degree of purification of the zinc sulfate solution from manganese is:

80

100

98.0

98, 0

Froze From a 0.5 liter of neutral zinc electrolyte of the composition indicated above, a zinc hydroxosulphate product is applied, with a final effect of 0.125 l of a 25% ammonium hydroxide solution at 30 ° C.

one

and the final pH of the pulp is 7.0. The degree of purification from manganese and magnesium at the stage of precipitation of zinc is 93.0 and 99.3%, respectively. The precipitate of zinc hydroxy sulfate is washed with water at, the pulp is filtered. Then, in the presence of atmospheric oxygen, wash at pH 11.0, temperature and air supply rate of 2 l / min per liter of pulp for 3 hours. After filtration, the precipitate is dissolved in sulfuric acid (g / l).

The solution is divided into four parts. No carrier material was added to the first batch, 2 were added to the second, 3 to 3 g, 1 third, and 4 g / l of zinc hydroxide.

Mother consumption -withstanding carrier, g / lavki

The degree of cleaning,% 95,7,

Thus, the use of a carrier material reduces the degree of purification of zinc electrolyte to 98%.

In the case of precipitation, zinc hydroxysulfate hydroxide, according to the known method, is obtained a degree of purification from manganese is 90.5-93%. The use of zinc hydroxosulfate precipitate in the Presence of atmospheric oxygen under optimal conditions with the introduction of material-la-nositel makes it possible to achieve a degree of purification from manganese of 95.5-98%.

Table 4 shows the composition of zinc vitriol obtained from zinc sulfate solutions according to the proposed method, in comparison with the requirements of GOST. From the data of table 4 it follows

that the zinc sulfate obtained according to the expected method corresponds to GOST in all respects. The product obtained without washing in the presence of oxygen

and the use of the carrier material in terms of the content of mrgts and insoluble residue does not satisfy the requirements of GOST.

The zinc sulphate solution without the addition of a carrier material has an intense yellow-brown color due to the presence of non-coagulated-1x particles of manganese oxyhydrooxo compounds. After two hours of exposure, partial coagulation occurred. But when filtered under vacuum, the aggregated particles disintegrate and a colorless filtrate cannot be obtained.

The composition of the purified solution of zinc sulphate, depending on the consumption of the carrier material. After purification, it is given in Table 3.

Degree rate:

cleaning of manganese coc98, 0

98.1

The advantages of the proposed method in comparison with the known one are in increasing the degree of purification of zinc sulfate solutions from manganese by 5-7% and the possibility of obtaining high-quality zinc vitriol.

Form -La invention

A method of extracting manganese from zinc-containing solutions, including treating the solution with ammonia or ammonium hydroxide at pH 5.4-7 and a temperature of 20-55 ° C, precipitating zinc hydroxosulfate, characterized in that, in order to increase the degree of purification of the solution from manganese, the precipitated zinc hydroxosulfate is subjected water in the presence of atmospheric oxygen at a pH of 8–11 and a temperature of BO – C02 is dissolved in sulfuric acid, and a reagent selected from the group containing zinc hydroxosulfate, hydroxide cyanide, is added to the resulting solution containing manganese nka, zinc oxide in an amount of not less than 3 g / l.

Components

T a b l and c a 2 Content, at a temperature, ° С

9 Table 3

Ingredients

Content, g / l, at the consumption of the main material, g / l

without additional payment

c

126

0.062 0.35 0.025 0.05

130

0.06

0.28

0.02

0.05

T a b l and 11 a 1

eight

130

0.065

0.16

0.02

0.04

Claims (1)

The method of extracting manganese from zinc-containing solutions., Comprising treating the solution with ammonia or ammonium hydroxide at pH 5.4-7 and a temperature of 20-55 ° C, precipitation of zinc hydroxosulfate, characterized in that, in order to increase the degree of solution purification from manganese, precipitated zinc hydroxosulfate is subjected to water washing in the presence of atmospheric oxygen at a pH of 8-11 and a temperature of 60-100 ° C, dissolved in sulfuric acid, and a reagent selected from the group containing hydroxide is added to the resulting solution containing manganese zinc sulfate, zinc hydroxide, zinc oxide in an amount of not less than 3 g / l. Table 1 Composition Components Content, g / l, at pH oxidation 7.0 8.0 ^9.5 1 eleven And 5 Zinc 128 132 136 132 126 Magnesium 0,068 0,065 0,061 0,062 0.059 Manganese 0.578 0.38 0.28 0.22 0.21 Potassium 0,025 0,025 <0.025 <0.025 0,025 Sodium 0.05 0,03 0.05 <0.05 <0.05 table 2 Components Content, at temperature, ° C of composition thirty 60 I in 100 Zinc 130 1 35 137 130 Magnesium 0.06 0,05.8 0,062 0.059 Manganese 0.54 0.23 0.18 0.16 Potassium 0.02 0.02 0,025 0.02 Sodium 0.05 0.06 0.05 0.05 Table I -------.-------------------—------------------- Components' Content, g / l, with the consumption of the material of the composition of the carrier, g / l without up ^! bavka - _g - -----! 2 1 I _: 3 8 Zinc 126 130 125 130 Magnesium 0,062 0.06 0.058 0,065 Manganese 0.35 0.28 0.16 0.16 Potassium 0,025 0.02 0.02 0.02 Sodium 0.05 0.05 0.05 0.04