INORGANIC SYNTHESIS AND INDUSTRIAL
Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 9, pp. 1470−1475.
Pleiades Publishing, Ltd., 2011.
Original Russian Text © L.N. Velikanova, V.V. Semchenko, V.Ya. Khentov, 2011, published in Zhurnal Prikladnoi Khimii, 2011, Vol. 84, No. 9, pp. 1418−1423.
Kinetic Regularities of Recovery of Metals
from Raw Materials of Industrial Origin
L. N. Velikanova, V. V. Semchenko, and V. Ya. Khentov
South-Russia State Technical University (Novocherkassk Polythechnical Institute) Novocherkassk,
Rostov oblast, Russia
Received September 27, 2010
Abstract—Kinetics of recovery of metals from the wastes and poor ores, which contain oxide and sulﬁ de minerals
of copper, vanadium, and silver with an azomethine solution in organic solvent was studied. The optimal parameters
of the recovery were suggested.
Many industrial plants are the source of wastes
containing metal elements. These are mining,
metallurgical, and electroplating tailings, spent catalysts
from organic synthesis, and wastes from abrasive
processing of metals. A signiﬁ cant amount of metal
elements is present in dust emissions of mechanical
Presently, processing of wastes and ores with
a low content of metal elements is economically
disadvantageous or impossible due to lack of appropriate
technologies. The increased demand for various non-
ferrous metals and the depletion of ore deposits stimulate
searching for new ways of processing [1–7].
As known, azomethines can form complex
compounds with many transition metals in dissolved
form, particularly with metal acetates in alcohol medium
on boiling . It was established that azomethines in
aprotonic solvents with a large Dimroth–Reichardt
electrophilicity parameter Е
at temperature not higher
than 30°С can recover metals directly from metals,
oxides, sulﬁ des, carbonates, silicates, phosphates and
spinels in solid phase. This made it possible to use as
starting raw material metal-containing wastes and dust,
out-off-balance ores of native metals, and poor ores
containing both sulﬁ de and oxide minerals.
In this work, the kinetics and mechanism of interaction
of the mineral components of poor ores and wastes
of industrial origin with a 2-oxy-1 benzylideneaniline
(salicylal aniline, SA) in organic solvents were studied
and the optimal parameters of the extraction of metals
by this reagent were determined.
We studied recovery of copper from dust emissions
formed in a number of plants. Objects of study were
and ores of cuprite Cu
O, tenorite CuO,
malachite Cu (OH)
, chalcosine Cu
CuS, chalcopyrite CuFeS
, and bornite Cu
we studied recovery of vanadium from vanadinite Pb
Cl and recovery of silver from argentite Ag
The concentration of metals in the samples was 0.1–
0.7 wt %. Samples were immersed into a solution of
2-oxy-1 benzylideneaniline in dimethylformaldehyde
(DMFA) at agitation. The agitation rate was 200 rpm,
temperature 25°С, and the liquid-solid ratio, 60 : 1 or
30 : 1.
Lump leaching was performed during 5 days in
packed pulp without agitation (the liquid-solid ratio 10 :
1 or 5 : 1). Samples were ores containing 50% of 7.8-
The process rate was determined from change in the