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Through our worldwide network of branches, our trommel screening specialists supply complete turnkey trommel solutions tailored to your specific process and plant requirements, from engineering and design, through to installation, commissioning, field service and the supply of trommel spares, including screen panels.
Multotecs ongoing research and development and focus on continuous equipment optimisation has resulted in rotary trommel screens that are engineered for maximum impact and abrasion resistance to deliver enhanced screening life that optimises your process efficiency.
Our heavy duty trommel screens consist of the rubber-lined steel frame and replaceable screening surface. Several modifications can be made to this basic trommel screener, including a dual media screen to produce a two-fraction material grading.
When a client requires a new trommel screen, our first step is to determine the main process parameters of your application. There may be a lot of variation in the diameter of the bolt on flange diameter, for example, as it depends on the size of the mill.
The feed end flange is designed to be compatible with the mill or scrubber flange. The flange has a machined face with a compatible bolting arrangement to the mill / scrubber discharge trunnion flange.
The internal diameter of the feed-end flange or feed-end liners is designed to be the same diameter as the mill discharge or mill discharge liners. The trommel feed end liners can also have a slightly larger diameter to create an outwards step to compensate for wear of the mill discharge liners.
Using Finite Element Analysis (FEA) across the complete trommel screen design allows Multotec to calculate the stresses in the structure for a full rotation in order to optimise the fatigue life. The design process adheres to BS 7608:1993 for Fatigue Design Assessment of Steel Structures. Self-driven trommels are also designed by means of FEA and can also be supplied with a feed and discharge arrangement in accordance with specific customer requirements.
FEA is also used to calculate your unique requirement for special cross bracing to counter torsional twisting and account for the ongoing stress placed on the trommel by continuously shifting material loads.
Installed at the end of grinding mills and scrubbers, trommel screening is an efficient, mechanically robust method of screening coarse particles, with a trommel screen machine delivering excellent performance over a long service life.
Trommel screens provide a lower capital cost alternative to vibrating screens, and generate significantly less noise in your plant. Decades of global experience and innovation by world-leading metallurgists and mineral processing engineers at Multotec has allowed an optimum trommel screen design that reduces pegging and blinding and enhances your screening performance.
Our modular polyurethane or rubber panels allow only worn screen panels to be individually replaced, not the whole system. Our unique pins and sleeves or bolt down fastening systems simplify any maintenance requirements.
Multotec provides full engineering support and aftersales services for your screening plant. With preventative maintenance geared towards enhancing longevity of your trommel system, we can completely refurbish worn trommel screens to give them a far greater service life, and reduce capital requirements for your plant.
This includes stripping the rubber lining from the steel structure, prior to visual inspection for wear and non-destructive testing, carried out to determine the integrity of the trommel structure. If your screen is still within specification it can be shot-blasted and re-lined with rubber.
As leading trommel screen manufacturers, Multotec helps customers build larger trommel systems, by overcoming the high wear rates caused by higher peripheral speeds, heavier volumes, and increased flow rates and velocities.