Rio Tinto has asked for proposals on renewable energy projects to power its aluminium projects in Queensland, Australia to supply power by 2030, Rio Tinto said.

The miner is looking to wind and solar power to provide electricity for its Boyne smelter, Yanwun alumina refinery, and Queensland alumina refinery, all located in the Gladstone region of Queensland.

The projects will need to produce 1140 MW of power for the assets.

 "It is early in the process, but this is an important step towards meeting both our Group climate change target of halving our emissions by the end of the decade and our commitment to net zero emissions by 2050," chief executive Ivan Vella said.

Rio Tinto is targeting a 50% reduction in its Scope 1 and Scope 2 carbon emissions by 2030.

The company also signed a cooperation agreement with the government of Queensland in October 2021 to make the Australian state "an industrial and renewable energy powerhouse."

The plan is for the government to work with industry to build renewable energy plants more quickly.

"As Queensland's largest energy user and a major Gladstone employer and manufacturer, Rio Tinto is uniquely positioned to work with the Queensland Government to deliver this vision," Vella said.