Oriented towards the goal of “ultimate purity, ultimate excellence”, with the front-edge technique of purification and plentiful hands-on experience in operation, UMM has constantly developed exclusive process and facilities to produce super-pure, super-fine serial products of Re, W, Mo which are highly interested by domestic and international customers and institutes. The chemical purity of products is up to 99.999% and the physical properties such as powder size can be customized to a desirable fine level. Recently UMM has successfully mastered the process and technology to produce rhenium powder with the purity of 99.99% to 99.999%, and the average particle size can be controlled within 1~2 µm.