Molybdenum Roasting

Table of Contents

MoS2 Roasting Experience

MoS2 Roasting Experience

Multiple Hearth Roasters are available reliable furnaces.
Roasting reactions are slowed allowing for furnace temperature control.
SO2 off-gas can be fed to recovery processes which also produce a salable by-product. (Sulfuric Acid)
Existing equipment is utilized with non-exotic materials of construction.

Significant energy recovery is not possible.
Reactions are slow and inefficient requiring large surface area roasting equipment size.
Operating Labor and Operating conditions are less than ideal. (Cleaning of Arms, Teeth, Dropholes, Off-Gas Ductwork, etc.)
Low concentration SO2 off-gas can be fed to the acid plant but generally need additional fuel or SOx for acid conversion.
Low SO2 levels require large gas cleaning and acid plant volume capacities.

Molybdenite LSO Continuous Process Reactor Systems

The two-step “looping oxidation” process effectively removes sulfur while producing products of excellent purity in an energy generating and environmentally friendly manner.
Reactor 1: MoS2 + 6 MoO3 → 7MoO2 + 2SO2
Reactor 2: MoO2 + Air → MoO3
OMT’s new patent greatly increases the energy generation potential of LSO.

Significant energy generation is economically attractive.
Rich SO2 off-gas can be fed to efficient ancillary recovery processes which also produce energy.
Reactions are fast and efficient allowing for reduced equipment size.
Maintenance costs reduced and Operating Labor and Operating conditions are greatly improved.
Commercially available equipment is utilized with non-exotic materials of construction.
Efficient rhenium recovery is also possible.
Both LSO reactors operate in an exothermic manner allowing for stable rapid reaction kinetics.
SOx strength will exceed levels achievable by any other process. This will allow for smaller acid plant equipment or greatly increased efficiency of an existing acid plant.
MoO2 can be produced which is a better product for alloy steel applications. MoO2 has a higher Mo content and is more stable in alloying practice improving recovery of Mo into the alloy steel.
High solubility MoO3 and/or MoO2 can be produced in any desired ratio.

Molybdenite LSO Facility

The ‘Looping Process’ can be utilized to generate energy and treat other large volume primary metals.
To date positive results have also been demonstrated with:
Mo, Co, Cu, Fe, CuFe – Sulfides
Evaluations continuing with:
Ni, Zn, Sn, Pb
Energy generation from the Acid Plant is also large and quantified.
SO2 condensation and recovery is also a viable SOx recovery method.