Innovative technology recycling phosphogypsum

1
Innovative technology recycling phosphogypsum
ESTAGEO LLC TEPLOENERGETIK LLC
T. Bashlikova, E.V. Adamov, M. Gusakov
2
Apatite concentrate
Apatit JSC
Phosphogypsum is product of processing
apatito-nepheline ore. Large apatite deposits are
well-known and are mined in the following
countries Brazil (2,0 billion tones), South
Africa (1,0 billion tones) ? Finland (1,5 billion
tones). Total world reserves of apatite ore is
23,3 billion tones.
3
Phosphogypsum Dumps
In general, Russia has already accumulated
approximately 200 million tons phosphogypsum
(annual creation of the material in RF is
approximately 1011 million tons).
4
The urgency of the problem

1. Solving ecological issues
2. Development of rare-earth elements from dumps
3. Increase in demand and cost of rare-earth
   elements in the world
4. Depletion of natural resources of gypsum and
   economic feasibility of receipt from
   phosphogypsum dumps

5
Global consumption of rare-earth elements in 2010
6
Consumption of rare-earth elements
Undivided products Split products
Manufacture of glass Cerium is need for manufacture of catalytic neutralization-filters for car exhaust
Petrochemical and refining industries Samar and neodymium is need for manufacture of magnets
Metallurgy Lanthanum neodymium is need for manufacture of phosphors and ceramic capacitors
Manufacture of accumulators and polishing powders Yttrium, europe, dysprosium, erbium, terbium and gadolinium are need in electronics and radio industry
7
The need for search of the new recycling
technology of phosphogypsum
In European countries fix tax for the
phosphogypsum dumps is equal 30 euro per ton
In Russia fix tax for the phosphogypsum dumps is
equal 8 USD per ton
Waste of 2-4-th class of danger
Waste of 4-th class of danger
8
Well-known processes recycling phosphogypsum
Well-known processes recycling phosphogypsum and
extraction of REM are labour-intensive and
require significant enough cost of capital
construction and organizing of additional
production, and sometimes rather environmentally
dangerous.
9
Bioleaching Technology
Leaching agent in the technology is a selective
association of microorganisms.
10
Bioleaching Technology
Biocoenosis
Phosphogypsum
Strain-1
Strain-2
Selective association of microorganisms

...
Strain-n
11
Research Data

• Bioleaching technology result to
• Rare-earth metals are extracted in this process
  into solution (REM is 5570 this study and can
  be increased to 8590 with intensification
  process)
• The bioleaching discharge of sulphuric acid is
  5.5 times lower than discharge in sulphuric-acid
  hydrometallurgical process
• At the end of this process on the future of
  hydrometallurgical processing is the cleared
  material without any phosphoric and fluoric
  compounds
• A simplification, intensification and less
  expensive method of phosphogypsum processing,
  more favourable ecological conditions

12
Economic Impact
In half Russian reserves phosphogypsum the
rare-earth metals only are estimate at 55
billion USD!