HARARE – Major platinum miners in Zimbabwe have met a government deadline to agree and submit plans to build a major refinery in the country by the end of 2016, State media reported on Sunday.

President Robert Mugabe's ZANU-PF government gave platinum mines until January 18 to submit proposals to build a precious metal refinery within two years, or risk a ban on raw exports of the metal.

The world's two largest platinum producers, Anglo American Platinum (Amplats) and Impala Platinum (Implats), both had operations in Zimbabwe, which had the second-largest known platinum reserves, after South Africa.

Mines and Mining Development Minister Walter Chidhakwa was quoted by the State-controlled Sunday Mail newspaper's website as saying he had received plans for the construction of a major refinery from Implats' local unit Zimplats, Amplats' local unit Unki, and the Mimosa mine, which was jointly owned by Zimplats and Aquarius Platinum.

"They have submitted their proposals and we are evaluating them.They have made a commitment that they will continue to support Zimbabwe, and the setting up of a platinum refinery is one of their aspirations," he said.

Chidhakwa and spokespersons of the mining companies were not available for comment to Reuters on the report.

The Sunday Mail said the mining firms had also promised to look at the possibility of setting up smaller processing plants and processing ore at an existing small plant. The Mail also said the companies raised questions over funding and secure power supplies.

It quoted Zimplats spokeswoman Busi Chindove as saying recently that the company had invested $30-million in feasibility studies that assessed the cost of a major refinery at about $2-billion.

Zimplats owned a base metal refinery that separated minerals like nickel, chrome and copper from platinum metal groups but said outdated technology made it too expensive to run, so it sent platinum concentrate to South Africa for processing.

The Zimbabwe chamber of mines, which estimated 2012 output of refined platinum at 350 000 oz, about 6% of world output, has said the country would need to raise platinum output to 500 000 oz/y to justify a refinery.