Quarry & Aggregate
CASE STUDY GIRTON - TARMAC CENTRAL LTD - GIRTON QUARRY, NEAR NEWARK
Continental Conveyor Ltd recently designed, manufactured, installed and commissioned an overland conveyor system to convey sand and gravel at 250 t.p.h. from the new reserves at Tarmac Central Ltd Girton Quarry near Newark.Notts
The three drive field system comprised the following =- CV1 Face Conveyor 18.5 k.w.150 mtrs\ long with a 4 mtr lift complete with varitrough structure to feed onto Trunk Conveyor CV2
- CV2 Trunk Conveyor 55.k.w. 650 mtrs long Double Drum Drive with a 7 mtr lift complete with varitrough structure to feed Field Conveyor CV3
- CV3 Field Conveyor 18.5.k.w. 15 mts long with a 7 mtr lift complete with varitrough structure lift to feed Grizley
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CASE STUDY WIENERBERGER - THE BRICK BUSINESS - WARNHAM WORKS, HORSHAM, WEST SUSSEX
Clay for brick making is transported by a series of conveyors from the quarry to a clay storage facility prior to use in the manufacturing plant.
Our client had a requirement to modify their existing conveyor system by re-routing and extending the original conveyor system to a “new†clay storage facility.
The revised route had to follow a curving corridor of land some 6m wide around the perimeter of the old plant and adjacent to a railway line. Proposals had been put forward to follow this 752m long route. Some of the proposals under consideration involved using many conveyors of varying lengths.
Continental Conveyor Ltd proposed to Wienerberger that the route could be achieved using a single curved conveyor and based on this proposal Wienerberger placed their contract in December 2004 to design, manufacture, install and commission the complete new system. The new system requires the curved conveyor to load to an elevated gantry conveyor, which runs into the new storage building. This conveyor has a travelling tripper unit to spread the clay inside the building.
The contract actions were: -- Shortening back the existing conveyor line and re-establishing the line to load onto the new curved conveyor.
- Removal of two conveyors in the area of the new storage building to make way for the new conveyors. (Some components of these unused conveyors were utilised in the new system).
- Design, manufacture, install & commission a new 750m long curved conveyor.
- Design, manufacture, install & commission a new 116m long elevated gantry conveyor, complete with travelling tripper unit.
System specification:
Product: Quarried Clay
Density: 1.9 tonnes/cu. m.
Sizing: - 110mm
Capacity: 150 tonnes/hr
Curved Conveyor:
Length: 750m
Lift/fall: -3.4m
Minimum curve radii: 300m
Belt width: 750mm
Belt speed: 1.5 m/s
Installed power: 55kw with Electronic Soft Start
From the tail end the first 670m of the conveyor is floor mounted on sleepers, passing through a culvert some 5m wide. The last 80m of conveyor rise in gantries to the discharge point. Along the length of the conveyor there are 8 different curve radii. The smallest radii being 300m located at a point 50m from the tail end. A 400m radii curve is located in the gantry section towards the discharge end.
The curved route is made more difficult due to ground undulations, which include a fall from the tail end and a lift at the head end, resulting in an overall fall of –3.4m.
Gantry Conveyor:Length: 116m
Lift: 5m
Belt Width: 750mm
Belt Speed: 1.5 m/s
Installed power: 22kw with Electronic Soft Start
General Conveyor Specifications:
All steelwork fully galvanised
Ceramic lagged drive & snub drums
Belt tension by GTU
All gantries with walkways both sides
All conveyor sections are covered
System Commissioned April 2005
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