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The cupola furnace is a most widely used foundry furnace for melting of cast iron. Besides main product, cast iron, also secondary products are formed in cupola furnace. They have a character of secondary raw materials, or industrial wastes. Under the laws applicable to waste management, the waste producer is obliged to ensure their disposal without negative environmental impacts. Typical, and main secondary product of cast iron production is a cupola furnace slag. Its occurrence is approximately from 40 to 80 kg ...