LONDON, Jul 27, 2011 (Dow Jones) -- Belgian zinc producer Nyrstar NV (NYR.BT) Wednesday reiterated its concentrate production guidance for 2011 and said other metals like silver, gold, lead and copper are becoming increasingly important to its earnings.

The company said it expects to produce 215,000 metric tons of zinc in concentrate this year, and will update its guidance after it closes its acquisition of Canada-based Breakwater Resources Ltd. (BWR).

Nyrstar produced around 13,300 troy ounces of gold in concentrate, 1.273 million ounces of silver in concentrate, 1,000 tons of lead in concentrate and 2,800 tons of copper in the first half.

In the first half of the year, Nyrstar's smelting division achieved record zinc metal production of about 561,000 tons. Production in the period was 2% higher than in the second half of 2010, which was a record half year, primarily due to the increased production at the Balen smelter in Belgium and the Hobart smelter in Australia.

Lead production at the Port Pirie multi-metals smelter in Australia continued to improve during the first half, with production up 11% to 102,000 tons due to sustained improvements of the sinter plant and blast furnace operations, Nyrstar said.