FTSE 250 miner Kenmare doubled revenues in the first half and said it expected a significant improvement in production in the latter part of the year.Revenues were up 95% to $109m from $56m the year before, as the company benefitted from price increases and the falling away of legacy contracts.But the firm said first half revenues had been hit by lower production and the carrying forward of a significant amount of ilmenite at 2011 price levels.Pre-tax profits came in at £38.8m, up from a loss of $14.2m in the same period of 2011.Earnings per share were 1.61c, rising from the 0.59c loss reported the previous year."While the near-term global economic environment remains uncertain, continued industrialisation, and the ensuing urbanisation taking place in emerging economies, are expected to support strong demand for products that consume titanium feedstocks and zircon, " said Managing Director Michael Carvill.