Molymex - Cumpas

Acid Plant Database October 9, 2010

Owner	Molymex S.A. de C.V.
Location	Cumpas, Sonora Mexico
Background	-
Website	www.molymet.com
Plant	-
Coordinates*	30° 0' 40.5" N, 109° 46' 57.5" W
Type of Plant	Metallurgical Wet Gas Sulphuric Acid (WSA)
Gas Source	Molybdenum (MoS₂) multiple hearth roasting furnace
Plant Capacity	65 MTPD Gas Flow: 10,000 to 20,000 Nm³/h SO₂: 2.0 to 4.5%
SA/DA	2 SA Conversion: 99%
Emissions	SO₂: 0.05% vol SO₃: 10 ppmv
Status	Operating
Year Built	2001
Technology	Haldor Topsøe
Contractor	-
Remarks	Product Acid Concentration: 97.5% H₂SO₄ Power Consumption: 90 kWh/h Cooling Water: 39 m³/h
Pictures
General	This site roast molybdenum concentrates, mainly from Mexican or North American origin, to produce molybdenum oxide. The current installed capacity is 22 million pounds of molybdenum contained in concentrates per year, approximately 18,500 Metric Tons of concentrates. Output gases from the roasting process are cleaned by a scrubbing plant and then fed to a sulfuric acid plant. There the gases are converted to sulfuric acid, a product that is sold in the domestic Mexican market.
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


Sulphuric Acid on the Web^TM	Technical Manual	DKL Engineering, Inc.