Article first published in Aggregates Business International March-April 2017, Route One Publishing Ltd.
Writer: Guy Woodford. Edited by Metso.
There’s a constant stream of trucks entering and exiting Gayatri Projects Limited’s (Gayatri Projects) crushing and screening site in Nuh, a town in Haryana state, North West India. Here, 220-250tonnes/hour of granite rock is being processed into 0-6mm sand, and 6-12mm, 12-20mm and 20-26mm-sized aggregate products for subsequent transporting to Gayatri Projects’ concrete batching plants, around 20 kilometres away. There, they are being turned into a million tonnes of high quality concrete, including 400,000 tonnes of sub base, for the 22km KGP Expressway, running along the eastern side of Delhi.
Similar works are being carried out on the KMP Expressway, running along Delhi’s western and southern side. Once both projects are completed, the six-lane KGP and KMP Expressways will form a triangular traffic route around Delhi, helping to reduce already chronic congestion on the roads of India’s capital city.
The granite rock being crushed and screened at Gayatri Projects’ Nuh base is particularly tough, with a 2.7 density, over 30% crushability and 1800gm/tonne rated abrasiveness. The company’s crushing and screening fleet needed to be able to process a minimum of 60,000tonnes/month of this material during 25 18-hour operating days a month. Due to the reliability and impressive performance of Metso models used by Gayatri Projects over nearly 20 years, the company, part of the highly successful and industry diverse Gayatri Group, opted to deploy Metso’s NW Rapid plant solution with Metso NW106™ jaw crusher, NW220GPD™ cone crusher, and Metso DS1855 three-deck screen on the KGP Expressway project.