Clean up and new life for the site
Saloro has modified the historic site into a modern, efficient, responsible and sustainable mining and processing operation producing a tungsten rich concentrate product for sale.
Mining operations are being conducted in and around the historical mining excavation (open pit) making new use of this existing disturbed area.
The acid water which partially filled the existing open pit is being cleaned for re-use in the processing operations ensuring that the project is self-sufficient in its water requirements and is not a burden on other water supply sources in the area.
As part of the construction activities Saloro cleaned and removed in accordance with applicable legislation, all hazardous materials and areas of contamination existing previously at the site.
Following receipt of all project permits during 2014 and a comprehensive financing package in mid-2015 Saloro set about completing construction engineering, ordering equipment items for the Processing Plant and infrastructure, and putting all other pre-construction preparations in place (including the placement of 1.5M in environmental bonds with the Castilla y Leon government).
Construction activities are now underway at the site.
A modern and efficient mining operation
Saloro uses conventional open pit mining methods with drilling and breaking of rock, followed by loading of ore and waste using backhoe type excavators into large off-road style dump trucks. These haul the ore material direct to the main crusher feed for the process plant, whilst the waste rock is taken to a waste storage facility on site.
A simple and clean processing system
The process plant design allows for the production of ~260,000 mtus of WO3 per annum (at steady state operation).
This ore is processed through a gravity separation plant, which comprises the following three main components or stages:
Crushing only (no grinding) to achieve liberation of the tungsten mineral (scheelite)
Screening of the crushed product at 1mm ahead of a gravity pre-concentration circuit consisting of jigs and spirals to produce a pre-concentrate
A very small clean-up and tabling circuit at the back end of the plant consisting of shaking tables and sulphide flotation to produce a cleaned tungsten mineral product which is dried and packed into bags for shipment
Stages 1 and 2 in the processing results in most of the initial feed to the plant being discarded as a clean waste product, leaving only a small percentage of feed material going on to be treated in Stage 3. The inert and drained waste product produced at the end of Stage 2 is mixed with the waste rock from the mine in the waste storage facility developed at the site. There is no tailings dam required at the site.
Water used in the process plant is recycled in closed circuit to prevent wastage and loss of the water resource.
The treatment process uses mostly water and gravity, with very limited usage of simple chemicals.