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Acid Plant
Database November 2, 2009
| Owner |
Molibdenos y Metales S.A.
(Molymet) |
|
| Background |
- |
| Location |
Nos
Chile |
| Website |
www.molymet.cl |
| Plant
|
Nos Plant |
| Plant No. 1 |
Plant No. 2 |
| Coordinates* |
33°
37' 59" S, 70° 42' 2" W (Site) |
| Type of Plant |
Metallurgical
Wet-Gas Sulphuric Acid (WSA) |
Metallurgical
Wet-Gas Sulphuric Acid (WSA) |
| Gas Source |
Molybdenum Roaster |
Molybdenum Roaster |
| Plant Capacity |
104 MTPD
Gas Flow: 40,000 Nm3/h
SO2: 2.0 to 2.4% |
170 MTPD
Gas Flow: 60,000 Nm3/h
SO2: 1.4 to 3.75% |
| SA/DA |
1 SA
Conversion: 96% |
SA |
| Emissions |
SO3:
< 15 ppmv |
- |
| Status |
Operating |
Operating |
| Year Built |
1993 |
2007 |
| Technology |
Haldor Topsøe |
Haldor Topsøe |
| Contractor |
- |
- |
| Remarks |
Energy Consumption:
80 kWh/h
CW Consumption: 40 m3/h |
CW Consumption: 57 m3/h |
MOLYMET
roasts molybdenum concentrates to produce technical molybdenum oxide, molybdenum oxide
briquettes, ferromolybdenum, high purity molybdenum chemicals and all the rhenium
products. Yearly roasting capacity at this location is 46 million pounds of molybdenum
contained in concentrates (approximately 43,000 MT of concentrates per year), distributed
in three roaster furnaces.
Output gases from the furnaces are cleaned in a scrubbing plant and then converted to
sulfuric acid, which is sold in the domestic market. These two plants are an important
part of MOLYMET's efforts in taking care of the environment.
This complex is also equipped with a leaching plant, which allows copper removal from the
products. The copper is then recovered at an EW plant as high quality copper cathodes. |
| Pictures |
   |
| General |
MOLYMET,
a shareholder-owned Chilean corporation listed on the Santiago Stock exchange, is
processing molybdenum concentrates since 1964. The Corporation has production facilities
in Chile, Mexico, Belgium and Germany.
Molybdenum concentrates are treated at the plants for the production of technical molybdic
oxide, ferromolybdenum, high purity molybdenum chemicals and molybdenum metal powders.
These products are supplied to the steel, catalysts and specialty metal manufacturing
industries worldwide.
Rhenium is recovered as a by-product of processing molybdenum concentrates and is further
refined for use in turbine engine components and other industrial products. |
| References |
Laursen,
J.K., Recovery of Sulphur in Off-Gases from Roasting of Molybdenum Sulphide, Sulfide
Smelting 2002, pp. 143-153 |
| News |
- |
MTPD - Metric Tonne per
Day STPD - Short Ton per Day
MTPA - Metric Tonne per Annum STPA - Short Ton per Annum
SA - Single Absorption
DA - Double Absorption
* Coordinates can be used to locate
plant on Google Earth
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