SBM has started commissioning the primary crushing circuit at its Lace mine, in South Africa’s Free State province, paving the way for the processing of kimberlite from the Lace pipe to start again for the first time since 1930. Commissioning of the new crusher completed the plant modifications required for the second phase of underground mining. The initial mining rate from Phase 2 underground development at Lace is 1 000 t/d, with plans to increase this to 3 000 t/d in the second half of 2009. Over the next month, some 50 000 t of kimberlitic material remaining from previous mining would be processed to commission the new crushing circuit. One the circuit operated to design specification, the plant would be purged and a bulk sample of kimberlite from the Satellite pipe would be processed to determine grade.
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