A revolutionary concept for the thermal processing of mineral ores

A rotary kiln is a type of industrial furnace used for thermal processing of various minerals and ores. It consists of a rotating cylindrical drum, slightly inclined from the horizontal, down which raw materials and are heated. 

The difference between a direct and indirect rotary kiln lies in how the heat is applied. Direct heating involves the combustion of fuel inside the kiln shell with heat transferred directly to the material being processed. In an indirectly heated system, heating occurs externally, with heat transferred through the shell to the material inside.

Our indirectly heated rotary kilns are particularly relevant for the conversion of beta spodumene to lithium sulfate. They can also handle a range of other applications, including the thermal treatment alumina, bauxite, catalyst, clay, dolomite, diatomaceous earth, ferro-nickel/ferro chrome, iron ore, ilmenite, lightweight aggregate, limestone, magnesite, petroleum coke, phosphate, rate earth elements, soda ash, trona, and vanadium.

Yes! We have developed a complete indirect rotary kiln acid roasting technology specifically for the conversion of beta spodumene into lithium sulfate. Based around our indirectly heated rotary kiln, this simple but effective system ensures highest possible lithium recovery while reducing the cost and environment impact of the process. 

We believe our indirectly heated rotary kilns are well-placed to support carbon capture ambitions where process CO2 are an issue. We have the expertise and experience to analyse your application and suggest an innovative, tailor-made solution. Trials or small production campaigns are possible in our well-equipped technical centre.