New Concept Projects’ range of skid-mounted mills are designed to offer a simple, easy to manage grinding equipment solution.
Our skid-mounted mills are perfectly suited to projects with small tonnages, limited space, or constrained schedules. With easy installation and nothing more than a simple concrete pad required for civil laydown, these mills are bolted into a plant in an instant.
Their packaging also lends itself to ease of transport. Depending on the size, these mills and skids can be transported in 40ft containers or on flat racks. Our skid-mounted sizes range from 6ft to 12ft in diameter and from 110kW to 1250kW of installed power.
These mills are ideal for pairing with modular plants or as an easy-to-manage bolt down package for junior miners.
World’s First Trunnion-supported Stainless Steel Grinding Mill
Developments 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.
New 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 solution.
NCP 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 life.
Stringent 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.
Key Features include
Duplex stainless steel mill shell and ends Stainless
Steel girth gear guard
Corrosion resistant paint specification for all ancillary equipment such as drive train
Specifically designed main trunnion bearings and stainless steel wetted area protection for low pH conditions
Fully fabricated, stainless steel feed chute
Rubber liners with corrosion resistant fasteners.
All sealants and rubber compounds acid bath tested for suitability.
NCP’s contract included for the design, manufacturing and supervision of the Mill’s installation and commissioning.