SHANGHAI, Sep 14 (SMM) - Pilbara Company, one of the largest producers of spodumene concentrate in Australia, conducted its second spodumene concentrate auction on September 14, with the final hammer price set at a record high of US$2,240/mt for a total amount of 8,000 mt (grade 5.2%-5.5%), significantly sending up the costs of lithium carbonate to 167,000 yuan/mt.