Hofmann Engineering has the skills and comprehensive experience working with all the major OEM players and direct to mine sites supplying fabricated Mill Shells to the mineral processing industry.
We have two extensively equipped manufacturing sites for the supply of Mill Shells at Perth (WA) and Bendigo (VIC). Both sites have supplied our largest Mill Shells to date, 11.58m (38 feet) diameter mill shells, however we have the capability to manufacture 14.0m Mill Shells at Perth.
We are experienced in manufacturing shells in various materials that include the following:
• Structural Steel such as ASTM A36, AS3678-250 and AS3678-350
• Duplex Stainless Steel such as LDX2101 and SAF2205
• Carbon Steel with explosive bonded Duplex Stainless Steel cladding.
• Hybrid shells with Steel Flanges welded to Duplex Stainless Steel shell bodies.
The extensive range of shell configurations supplied include Trunnion Bearing supported Shells split into varying configurations such as 1 x 360°, 2 x 180°, 3 x 120° and 4 x 90° sections. In addition we supply Shell Bearing supported Shells which tend to be of smaller diameter sizes than the traditional Trunnion Bearing type and typically a 1 x 360° configuration.
Smaller Trunnion supported Mill Shells tend to have cast heads and can come with an integrated trunnion or with a separately attached trunnion. Larger Shells often require a fabricated head with a bolt on cast trunnion. These heads due their size, tend to be split in the same configuration as their parent shell, 2 x 180° etc. Hofmann Engineering has the capability and equipment to supply fabricated Mill Heads in the same materials as the shells and/or supply Heads and Trunnions in cast Steel or SG Iron.
In the event of an unplanned emergency breakdown, Hofmann Engineering has an impressive history in supporting our clients with the supply of Fabricated Mill Heads with integral trunnions, manufactured in a very accelerated delivery schedule and transported to site anywhere in the world via an Antonov heavy cargo plane. Our current best time was manufacturing completed in an industry record of 4 weeks from design to final customer inspection.