Anglo American group mining company Kumba Iron Ore, which on Tuesday reported a superb set of record half-year results, is working with Transnet to refurbish the iron-ore export line so that trains can move at an average speed higher than the current 30 km an hour. In the six months to June 30, Kumba’s earnings before interest, taxation, depreciation and amortisation (Ebitda) were R44.4-billion, and every additional million tonnes of iron-ore generates an extra R3-billion at current prices.