Kingston Resources Ltd (ASX:KSN) has begun commissioning of its crushing and grinding circuits as part of a wider refurbishment of its Mineral Hill processing plant close to its mine of the same name in New South Wales. Hard rock ore is now being processed through the plant, and full commissioning is set to facilitate a ramp up in gold and silver production from the mine’s open pits, following an earlier stage of tailings being mined and processed in May. Kingston’s use of existing company expertise for this refurbishment – which also involved the whole tailings mining team being trained and t…