Industrial waste slag means the open hearth slag, open hearth deposited slag and soaking pit slag etc They contain much iron and iron oxide, thus may be re covered and utilized for the sintering production.

• 工业废弃渣系指平炉钢渣、炉沉渣及均热炉渣等，它们含有较高的金属铁和铁的氧化物，用于烧结生产后，可使其得到回收利用。