Aggregates for concrete in Nigeria

Case Study
A Nigerian quarry operator produces aggregates for use in road base, concrete and asphalt from granite.
This operator has a original two stage crushing plant which consists of a primary (600×900mm) 24×36”jaw crusher, two secondary (300×1300mm) 12×51” finer jaw crusher.
The most popularly required sizes of aggregate in the market are 0~3/16” (stone dust), 3/16~1/2”, 1/2~3/4” and 3/4~1”. In this fines requirement, the operator only get 60~70 tons of aggregate per hour. The existing crushing plant is unable to meet the increasing demand on the aggregate with fines requirement and today’s increasingly high standard on aggregate shape.
This operator contacts with our company and hope to expand his quarry.

Solution
According to this operator’s requirement on fines and aggregate shape, our company designs a three stage crushing plant which consists of a primary (900×1200mm) 36×48” jaw crusher, one secondary S51” cone crusher (standard type), and one S51” cone crusher (short head type) in the tertiary section.
From this crushing plant, the operator can get a capacity of 240~260tph of aggregate with 0~3/16” (stone dust), 3/16~1/2”, 1/2~3/4” and 3/4~1” sizes