Electricity tariffs A section of the Glencore Merafe Chrome Venture. High energy costs and increased competition from China led to the suspension of smelting operations, but lower electricity tariffs had since improved the competitiveness of the smelter. Image: Supplied South Africa's last remaining manganese smelter, Transalloys, has stopped ferroalloys production, with no indication of when operations may resume - the shutdown affects 600 jobs and 7,000 downstream livelihoods.