TRUNNION-SUPPORTED STAINLESS STEEL GRINDING MILL
in process engineering are unveiling novel approaches to milling
in raffinate circuits. Commodities like copper, phosphate, uranium
and even gold have the potential to be processed in a way that introduces
acid (or highly acidic process water) immediately into the mill
feed as material enters the mill. The grinding mill, therefore the
mill operates under extremely low pH conditions (pH = 1-2) and needs
to be engineered to the most stringent measures.
Concept Projects (NCP) have successfully designed, manufactured
and commissioned the world's first trunnion-supported, full stainless
steel grinding mill to cope with this application designed by NCP
engineers, is the latest iteration of grinding mill technology to
be introduced into such a processing stream. The mill was designed
to withstand the extreme, low pH conditions of the acid in a raffinate
worked intimately with the client to design and deliver a machine
that fitted their exact demands. The end product is a work of bespoke
engineering, and a world first. Many aspects of the ancillary equipment
were also improved in order to provide robust and lengthened operating
material development and testing was undertaken to ensure that all
materials, compounds and surface could withstand the low pH environment.
Acid bath testing for materials all the way down to sealant and
fastener compounds were conducted.
stainless steel mill shell and endsStainless
girth gear guard
resistant paint specification for all ancillary equipment such
as drive train
designed main trunnion bearings and stainless steel wetted area
protection for low pH conditions
fabricated, stainless steel feed chute
liners with corrosion resistant fasteners.
sealants and rubber compounds acid bath tested for suitability.
contract included for the design, manufacturing and supervision
of the Mill's installation and commissioning.