More Mogensen equipment for Whitwell Quarry
Mogensen Raw Materials Handling have recently supplied additional equipment to Lafarge Aggregates’ Whitwell Quarry. The latest item, a Type S1054 Sizer, was installed by Worksop-based Wright Engineering Ltd as part of a substantial contract for a plant to produce a sand substitute for use in concrete manufacture. This new plant involved the supply and installation of a vertical-shaft impact crusher, the Sizer, and new structural steelwork, as well as the engineering work involved in modifying and repositioning existing conveyors.
The S1054 Sizer – a five-deck, 1m wide machine, powered by two Invicta rotary electric vibrators, Type BLz 45-45/4, each rated at 2,685W – is working in closed circuit with the impact crusher. The required product passes through all five decks and all oversize stone is recycled to the crusher.
The plant is capable of handling in excess of 100 tonnes/h of –20mm dolomite and extracting approximately 40 tonnes/h of –6.3mm stone (the sand substitute). Because the production rate varies depending on moisture content, a piano-wire panel is used in the lowest deck position during the winter months to ensure continuity of production.
There is a long history of Mogensen Sizers at Whitwell, several units having been in operation at the site for more than 20 years, and the installation of this latest machine follows a recent order for the supply of a Type S1034 Sizer to Steetley Dolomite Ltd, the lime-burning business operating on the same site.
Meanwhile, Mogensen have also recently supplied a fully-enclosed Type C1016 vibrating screen for the raw material intake at Marshalls plc’s Sittingbourne Works, where imported, finely crushed granite and marine sand were causing a problem in the wet-press department production line.
These two raw material feeds contained oversize tramp material, which was interfering with the operation of the wet press process and resulting in excessive stoppages and costly loss of production. The new vibrating screen has successfully eliminated this problem by scalping out any oversize material coarser than 25mm from the 200 tonnes/h flow.
The C1016 machine is 1m wide and fitted with two end-tensioned overlapping screen decks, which provide an effective screen length of 2.6m. The unit is powered by a single 4,000W Invicta rotary electric vibrator, Type BLz50 – 60/6, which induces a rotary vibratory motion.
Mogensen Raw Materials Handling, Harlaxton Road, Grantham, Lincs NG31 7SF; tel: (01476) 566301; fax: (01476) 590145; email: sales@mogensen.co.uk
