IsaMill Largest Agitator Bead Mill in the World General The patented IsaMill is a transformation in grinding technology based on high intensity stirred milling. The IsaMill was developed for fine grained orebodies that needed a step change in processing efficiency to be economic. The IsaMill significantly reduces the energy requirement, and media and capital costs of fine grinding. Just as importantly, the processing advantages of inert grinding greatly improve metallurgical performance compared with conventional steel media. Xstrata Technology provides detailed flowsheet design, installation and commissioning support and technology partner, NETZSCH, provides the mill's manufacturing and design expertise.