Outotec Ausmelt tin smelting technology
At the heart of the EMV project is the Outotec Ausmelt TSL technology. This technology combines the use of an Ausmelt top submerged lance within a simple well sealed, non-rotating Ausmelt furnace that allows for best practice environmental performance. The top submerged lance allows for the direct injection of air, oxygen (if required) and fuel directly into a molten bath. This results in rapid mixing and efficient reaction of materials within the furnace. The combustion of fuel at the lance tip also provides heat input to the furnace at the best location. With an ability to control the individual lance flows and furnace feeds, control of the process is very flexible.
With such inherent flexibility the Outotec Ausmelt TSL technology has been applied to a wide range of applications. For tin, it can be applied to concentrates and secondary feeds.
Outotec Ausmelt TSL technology is now accepted as being the technology of choice for new tin smelters or for the upgrading of existing tin operations currently using conventional technology, as was the case for the EMV project.
Outotec’s scope of supply in the EMV project included the control system, lances and furnace standby burner along with a range of commissioning services. The project also included the supply of a novel lance handling system fully designed by Outotec engineers. The system consisted of a traction drive (rather than the conventional drum hoist), providing a much smaller and simpler way for positioning the lance.