Our raw materials
The raw materials use in the production process are copper-containing dusts, ashes, drosses, shredded materials, sludges and runback slag with copper contents between 15 and 60%, other alloy scrap such as brass, bronze and red bronze with copper contents between 60 and 80%. Materials for refining such as scrap copper, wires, profiles (rods, metal sheets, rails etc.) as well as cut-up and sorted electrical cables contain around 80 – 99% copper. High-grade runback scraps from manufacturing semi-finished products are used directly in the foundry without refining. As well as these solid raw materials, copper chloride solutions from the electronics industry are also reprocessed.
In addition to copper, the raw materials above contain several other metals, such as nickel, zinc, tin and precious metals, for example. Following initial assessment and sampling, the supplies of the raw materials are used in the shaft furnace, converter, anode furnace or in the foundry’s smelting furnaces, depending on the type of refining required.
Inspecting the secondary materials we receive for problematic substances such as mercury, cadmium or lead is important here, as is checking for radioactivity. In the course of this assessment, which was devised by experts in the field, either the delivery is turned down or a green light is given for the materials to be processed.