FLSmidth has been contracted to deliver an integrated dry-stack tailings solution and a paste fill plant to Hindustan Zinc’s lead-zinc mine in Rajpura Dariba in Rajasthan to ensure environmental sustainability and significant process water recovery, as well as reduce the footprint of the tailings storage facility. The new order, which was booked in the December quarter, includes design, engineering, procurement, supply of equipment and the commissioning for integrated dry tailings and stacking along with tailings paste fill plant. FLSmidth will also supply two Automatic Filter Presses, two E-Disc filters and one 26 m diameter High-Density Thickener as the main pieces of equipment. The project is expected to be completed by February 2022.
Hindustan Zinc operates beneficiation plants at Rajpura Dariba and Sindesar Khurd, which both discharge tailings to the same tailings pond. The tailings dam was reaching capacity for conventional wet tailings deposition and so Hindustan Zinc needed a way to resolve this issue. The solution the company required would involve creating a small dry-stack tailings area with minimal environmental and physical footprint and also a method to backfill the mine by using an adjusted dry filter cake mix.
This new order follows a previous tailings-related order for Hindustan Zinc at its Zawar mine site in 2018.