Africa's second-largest copper producer said late last month that it would introduce new mining duties and increase royalties to help bring down mounting debt.
Shares in Australian rare earths miner Lynas Corp jumped 12 percent on Friday after Malaysia's prime minister downplayed the roles of two Lynas critics.
In draft proposals, the government said it would introduce extra levies on CO2 emissions for different sectors to push companies to clean up their acts.
Away from the seminars and cocktail parties, metal producers, traders and users will meet behind closed doors to hammer out details of next year's contracts.
President Ramaphosa announced a wide-ranging set of deals between government, big business and labour that he said would create 275,000 more jobs a year.