Gold miner Kaiser Reef is expecting to double production rates at its A1 mine, in Victoria, following a significant debottleneck and infrastructure improvements at the mine and the Maldon processing facility.

The company said on Friday that production at A1 is expected to increase to targeted rates of between 4 000 t/m and 5 000 t/m, up from the current rates of between 2 000 t/m and 2 500 t/m.

The increased production rate will be supported by the successfully commissioned high voltage (HV) power upgrade, further underground remote mining fleet purchases, improved ventilation infrastructure and accessing of ore bodies that had been developed over the previous quarter.

The processing plant is now semi-automated and has recently achieved reported production rates exceeding 200 000 t/y hard rock ore. Recoveries have stabilised consistently above 96% and the mill is now more stable and operates with reduced unit costs due to the efficiency improvements, the company told shareholders.