A UK-based global market trommel manufacturer is providing two trommel solutions for similar marine aggregates-based projects in Norway. Guy Woodford reports.
Capable of processing up to 750tonnes/hour, the HT212 is said to have been chosen due to its robust design, allowing it to cope with a very abrasive feed material and process large product sizes at a high hourly rate. The trommel, which can accept material sizes up to 1050mm direct from a dump truck into the model’s feed hopper, was supplied in conjunction with Tesab and presented in the company’s colours.
“The customer requires specific weights of rocks to be screened from the trommel barrel and this required the barrel to be designed specifically to suit these parameters while maximising the ‘open area’ of the screening surface,” said Lee Fletcher, senior design and sales manager at Stelex, based in Barrow Upon Soar, Leicestershire, England.
Fletcher said chutes are fitted under the second half of the 8m-long barrel separating the different product sizes ready for collection from bays on each side of the trommel.
He continued: “The purpose-built power unit for the trommel allows the barrel rotation speed and feeder stroke rate to be changed very quickly and easily from the touch-screen panel. These parameters can be changed to suit the feed material characteristics and the weather conditions at different times of the year. The standard 20’ container used for the power unit provides a safe and lockable housing for the motors, pumps and associated hydraulic and electrical equipment.
“It would not have been possible to carry out this project with any other screening method than the trommel based on the requirements of large feed and product sizes, and high tonnage rates.”
Stelex Engineering (Stelex) has also recently sold another HT212 model to a customer near Stavanger, in south Norway. Due to be installed this winter, the trommel will also be used to process marine aggregates for improvements to sea defences.
Speaking to Aggregates Business magazines about the two HT212 orders, Fletcher said: “There has always been a lot of interest in our mid-sized static trommels, and now we’re seeing that reflected in an increase in orders. The HT212 is ideal for pipeline laying, sea defences and wind turbine installation-based applications.
“Scandinavia is a strong market for us and we’re delighted about the two recent Norwegian orders. All our trommels are tailor-made to customers’ requirements in our manufacturing facilities in Prees, Shropshire. We’ve taken on more staff there and introduced more night shifts to meet rising customer demand.”
Fletcher said Stelex’s bespoke Hercules trommels can accept bigger feed sizes than many other trommels on the market. “Given that a lot of the material our customers work with can be brutal, we spend a lot of time on engineering each Hercules trommel barrel, so it can cope with the demands placed on it.”
The modular design of Hercules trommels allows for quick and easy installation, allowing the customer to begin processing material as soon as possible after delivery.
All Hercules trommels feature live drive steel hydraulically driven support rollers, variable speed drum to suit material flow, hydraulics powered by electric motor or diesel engine, skid frame support legs or under frame for concrete walls, and a variable speed reciprocating tray feeder to deliver ideal feed rates. They require no permanent operator and are also said to offer low maintenance operation.
