Development of technology for extracting copper from cyanide-containing solutions of processed gold and copper ores

1.

Development of
technology for
extracting copper
from cyanidecontaining solutions
of processed gold
and copper ores with
cyanide regeneration
presented by Kanaly
Yernazar

2.

Abstract
Extraction of gold from gold copper
ores is problematic due to technical
and economic difficulties associated
with the rapid dissolution of most
copper minerals during cyanide
leaching. This leads to excessive
consumption of cyanide, as copper
cyanide complexes are formed, which
negatively affects the process of
cyanide extraction and subsequent
detoxification.

3.

I
N
T
R
O
D
U
C
T
I
O
N
The mineralogical composition of gold ores varies
widely, among them there are relatively inert
minerals that interact weakly with cyanide
solutions, and minerals that actively react with
cyanide and dissolved oxygen. As a result, side
reactions increase the consumption of reagents
and in some cases reduce or delay the extraction
of gold into cyanide solution, and the products of
these reactions usually cause complications during
subsequent operations. For this reason, the
material composition of gold-bearing ores is one of
the most important factors determining the
effectiveness of the cyanidation process.
As the raw material base changes, gold-bearing
mines are forced to use ores with a more complex
chemical composition and varying degrees of
persistence. Therefore, there is a need to develop
technologies to reduce the cost of reagents,
especially sodium cyanide.

4.

The purpose of the
work
is to develop an effective
hydrometallurgical complex
technology for extracting
copper from cyanide–
containing solutions
of processing of gold-copper ores with
cyanide regeneration, which allows to
increase the technological and technical
and economic indicators of the gold
leaching process.

5.

PROBLEMS
• COMPLEXITY OF THE PROCESS
• PROCESS OPTIMIZATION
• OPERATING COSTS
• CAPITAL EXPENDITURES (CAPEX)
• ENVIRONMENTAL AND
ECONOMIC EFFICIENCY
ASSESSMENT

6.

THE TECHNOLOGY IS OF HIGH
IMPORTANCE AND NOVELTY IN
THE HYDROMETALLURGICAL
INDUSTRY FOR SEVERAL
REASONS
this technology makes it
the cyanide regeneration
this technology is an
possible to solve the
technology used in the
innovative combination
problem of efficient
process reduces the
of hydrometallurgical
extraction of copper
negative environmental
processes, which opens
from ores containing
impact associated with the
up new opportunities for
gold and copper, which
use of cyanide. Cyanide is a
optimizing the
is an urgent task in the
toxic substance and its use
production of copper
production of metals.
requires strict control and
and gold from gold ores.
safety measures.

7.

METHODOLOGY
LEACHING.
Preparation of the initial productive solution
SORPTION/ DESORPTION.
Determination of optimal parameters and indicators
of sorption and desorption of the sorbent
SULFIDIZATION.
Extraction of copper from solutions
RECYCLING.
Cyanide Recovery
DEPOSITION.
Obtaining copper sediment
ANALYTICS.
Physico-chemical analyses of products

8.

S
M
A
R
T
REFERENCE
S
STUDY OF LITERATURE
MAGNIFICATION OF THE PROCESS
ASSESSMENT OF ENVIRONMENTAL AND
ECONOMIC EFFICIENCY
RESEARCH. LABORATORY TESTS
THE QUALITY CONTROL

9.

thank
you!