ASARCO » SmeltingThe bottom layer of mostly copper and some iron is called matte. furnace_diagram · acid_plant The Acid Plant Sulfur dioxide gas from the flash furnace is captured and combined with water in an adjacent acid plant to produce sulfuric acid.The acid is sold as a by-product to chemical manufacturers in the United States.blister copper plant manufacturer,Copper concentrate - Russian Copper CompanyCopper concentrate. One of the Russian Copper Company's main products is copper concentrate, a product of copper ore enrichment. Copper concentrate is used for producing blister copper. The following enterprises of RCC Group produce copper concentrate: Mikheevskiy Processing Plant (Chelyabinsk Region, Russia).