Global miner Rio Tinto Ltd says it will sell its entire stake in Rossing Uranium to China National Uranium Corp Ltd for up to $106.5 million.

The sale of the 68.62 per cent stake in Rossing Uranium, which owns the Rossing mine in Namibia, ends a period of extensive strategic assessment, the miner said in a statement.

"The sale of our interest in Rossing once again demonstrates our commitment to strengthening our portfolio and focusing on our core assets," Rio Tinto chief executive Jean-Sebastien Jacques said.

The deal is subject to certain conditions, including approval by the Namibian Competition Commission.