Apart from the economic and technical advantages of ConRoast over conventional six-in-line smelters, the process has significant environmental advantages. Primarily, all of the sulphur in the concentrates is converted into sulphur dioxide in the roasting plant and immediately converted into sulphuric acid. As a result, there is little risk of fugitive gas escaping into the atmosphere as can be the case with conventional processes. ConRoast is not restricted to processing low-sulphur ores as some of the conventional smelters can be.
An added and important environmental advantage is that all of the chrome- and nickel-rich UG2 and Platreef ores can be mined without the need to blend them with low-chrome Merensky reef. Ore from which acids can leach does not have to be left un-mined or un-processed underground or on surface dumps.