Several global metals producers have also set their sights on Indonesia's nickel reserves, looking to tap an expected surge in demand for the battery metal.
Delivering a $7.1 billion budget in parliament, Margaret Mwanakatwe pledged to bring debt down and to trim the fiscal deficit to 6.5 percent of GDP in 2019.
The state miner warned it would "assert its rights" in Barrick Gold's acquisition of Rangold's stake in the Kibali mine, but did not provide details of its plans.
The Swiss asset manager and commodities trader will use blockchain technology to account for trades and aims to offer investors the option to use its coin as a digital currency.
Albemarle aims to eventually end its dependence on two smaller units to fund growth as global appetite surges for electric vehicles and consumer goods.