Indonesian miner Amman asks for copper export ban delay

Indonesian copper miner PT Amman Mineral Internasional is in negotiations with the government to allow it to continue exporting copper concentrate beyond May 31, its chief executive said on Wednesday, while predicting a surge in output this year. Indonesia will impose an export ban on copper concentrate from June, a policy meant to force miners to invest in smelting facilities at home. The government wants miners to sell products with higher values to boost export earnings.