"The interventions include the proposed introduction of the export tax on chrome ore, the usage of energy efficiency technologies on smelters, and the adoption of cogeneration and self-generation technologies," said Minister in the Presidency Jackson Mthembu, reading the statement.

He did not disclose details of the export tax.

Chrome ore is a key ingredient in stainless steel, an essential material for the automobile industry. South Africa last year supplied 12.5-million tonnes of chrome ore to China - 83% of China’s total chrome imports.

Companies mining and processing chrome in South Africa include Glencore, Merafe Resources, Samancor Chrome, Tharisa, and Jubilee Metals.