SU1624037A1 - Method for removal of arsenic from copper arsenide slurries - Google Patents

Description

one

(21) 682250/02 22) 28-О1, 89 (46) 01.30.91. Bul № 4 (71) Caraggygda State University and the Institute of Organic and Coal Chemistry (72) M.Zh. Zhurinov, K, J. Zhumashev, M.I. Zambekov and A.S. Isabaev

(53) 669.778 (088.8)

(56) Kuznetsov G.I., Rrydin Yu, N. Our problems in the production of non-ferrous metals and methods of its removal and neutralization. Hezigy dokadov All-Union scientific and technical meeting. M-, 1976, p. 24-25.

(54) METHOD FOR REMOVAL OF A BRUSH FROM A MEDICULAR MUSCLE SPARS

(57) The invention relates to methods for processing ductile mice.

sludge, forming copper-electrolytic plants in the electrochemical refining of anodic copper. The purpose of the invention is to obtain a concentrate of powdered copper, an increase in the degree of removal of the mouse from copper production. For this, the sludge is calcined at t 500 ° C without air access in the presence of a mouse with oblique oxidizers, copper arsenates. Copper arsenate consumption is calculated according to the empirical formula: Copper arsenate consumption by mass of sludge,% 70f (CC (J- 33.7) 0, + 0,: SSI, where C Cu is the percentage of copper content in the arsenate; percentage the mouse in the sludge; 0.075 and 0.63 are the consumption coefficients for copper and mouse, 1 table,

J

The invention relates to non-ferrous metallurgy, in particular, to pyrometalurgic methods of extracting a mouse from copper production during processing, copper mouse sludge and copper arsenate, which is formed during the cleaning of spent copper electrolytes.

The number of mouse-containing copper intermediates in copper production includes copper mouse, cov- ers, and copper arsenates, from where it is advisable to organize a mouse removal from production. Due to the absence of a special technology for its processing, copper arsenate is fed to reflective melting, in which the mouse with waste gases is emitted into the atmosphere, and copper passes into matte. There are a number of ways to remove a mouse for copper-sludge slurry, but despite this it is also a recycled product, so there really is a need to recycle it and remove the mouse.

The purpose of the invention is to obtain a concentrate of powdered copper, an increase in the degree of removal of the mouse from copper production.

Another mouse is taken as a reagent for the oxidizing agent; a malleable industrial product, copper arsenate, and the mixture is calcined at t: 5000C. The consumption of copper arsenate depends on its composition (copper content) and the content of the mouse

ABOUT

four

About WITH

4J

in the sludge, therefore, to determine its exact consumption, based on the obtained experimental data, an empirical formula is proposed: Copper arsenate consumption by mass of sludge, 7. -

 19Yssu.133A7) o1 d75 + d1rbz1cA§

with

Si

where C

Si

 As

- percentage of copper in the arsenate;

- percentage of mouse in sludge;

0.075 and

0.63 - copper consumption ratios and mouse, respectively.

The mouse goes into sublimates, and the powdered copper remains in the candle. It is advisable that powdered copper should be returned to the stage of purification of the spent electrolyte from mouse I. to obtain copper arsenate, since for this purpose, special granules are used in practice. The use of powdered copper significantly speeds up the process; there is also no need for special preparation of copper reagent. The absence of the release of gaseous substances allows the process to be carried out in a closed system, which eliminates the pollution of the atmosphere. Another variant of the process can be combined with the production of blister copper. To do this, at the end of the process of converting copper brine and before fire refining of blister copper, a prepared mixture of sludge with copper arsenate is fed to its surface. At the same time, the mouse goes into the converter dust, from where it is extracted by the existing processing technology, and copper into the draft metal. The process proceeds very quickly.

The essential difference of the proposed method by Og is the use of a mouse for a coarse stockpiled product, copper arsenate, as an oxidizing agent.

Example. Miktu (13 g) from copper mouse malleable sludge (10 g) containing 57.2% copper, 18.2% mouse and synthetically prepared copper arsenate (-3– 3.89 g) are placed in a tubular electric furnace in a quartz boat

0

five

0

five

0

five

0

five

ke. Air is displaced from the system by purified argon and the furnace temperature is raised to 500 ° C at a rate of 8–10 K / min. The candle is then cooled to room temperature, weighed and analyzed for mouse k, and copper calculated by calculation.

Mouse k in the sludge is mainly in the form of copper arsenide, therefore, to determine the optimal consumption of copper arsenate and to derive an empirical equation, experiments 1-6 are carried out with pure arsenates and copper arsenides.

Experiments 1-3. Starting materials: 10 g of copper arsenide (Cu-As) with a content of 28.2% mouse and copper pyroarsenate (Cu AsjO-j) with a content of 40.7% copper.

Experiments 5 and 6. Use mixtures of pyro- and orthoarsenate copper. The rest of the conditions are the same.

Test 7. With industrial sludge (with a content of 57.2% copper and 18.2% mouse), neutral firing is carried out without adding reagents to determine the expenditure ratio of arsenate, which is 0.7, i.e. the addition of arsenates is necessary to remove 70% of the mouse, and the remaining 30% is removed without the addition.

Experiments 8 and 9 with C industrial sludge using pyro- and ortho-arsenate copper, respectively.

The results of the experiments are presented in

table „i

As can be seen from the table, a deficiency (experiment 1) or an excess of copper arsenate (experiment 3) leads to a decrease in the degree of mouse removal. Depending on the copper content in the arsenate, the consumption of the latter should be specific to each case. For example, when using copper pyroarsenate (CigAzG07), its optimal consumption is 34.02%, and for ortho-arsenate (Cu 3 (As04) 2) - 38.9%. Therefore, using the results of experiments 1–4, an empirical formula was derived that takes into account the relationship between the concentration of copper in the arsenate and the mouse in the copper arsenide. The flow rate of arsenate mixtures (experiments 5 and 6) was calculated using this formula and, as can be seen, provides a high degree of extraction of the mouse from the charge.

Up to 30% of the mouse is removed from the production sludge by simple burning.

(experiment /), therefore for the remaining 70% it is necessary to add copper arsenate with a utilization factor of 0.7. Good results are achieved (runs 8 and 9).

The advantages of the proposed method in comparison with the known are:

obtaining a concentrate of powdered copper suitable for: cleaning the spent electrolyte from arsenic, which prevents the need for special preparation of copper reagents for this purpose;

removing the mouse not only from the sludge, but also from copper arsenate, which are currently being stockpiled and partly recycled from the mass of slag, 7,

where ss | - percentage of copper

in the arsenate;

С de - percentage of mouse in sludge;

 . Mea.-zz.otmias.

sSt

 and

0.63 - respectively, the coefficients for and by mouse.

24037

products and sources of environmental pollution mouse com.

Claims (1)

Invention Formula A method for removing a mouse from copper mouse sludge, including oxidative roasting at 500 ° C and higher, characterized in that, in order to obtain a concentrate of powdered copper and increase the degree of removal of the mouse from copper production, as an oxidizing agent ° reagent use of copper arsenate obtained during the purification of spent copper electrolytes from the mouse, the consumption of which is calculated by the empirical formula Ea.-zz.otmias. sSt  and 0.63 - respectively, the consumption coefficients for copper and mouse.