Buffalo, New York – Derrick Corporation has introduced a new polyurethane interstage screen for use in gold recovery plants. The G-Vault screens are designed for carbon in pulp/carbon in leach and resin in pulp/resin in leach applications.
Derrick’s PU screen cuts costs at gold recovery plants
The company says the abrasion and blind resistance (or resistance to clogging) of the PU material reduces maintenance requirements. Screens made with the material need less washing and unblinding than stainless steel wedge wire screens. Several sizes are available, with screen apertures from 500–1200µm.
The G-Vault is a direct bolt-in replacement for the wedge-wire screen, using the same operating mechanism. It comprises several independent screen sections, held in place by a 304 stainless steel cage. The sectional design means individual heavily worn sections can be replaced, rather than the entire screen.
The company carried out field tests at mines in six countries. In some applications, it said, run times without periodic cleaning cycles have been extended beyond 18 months. Although it is more expensive than a wedge wire screen, the company claimed that the reduced maintenance costs give a favourable return on investment.