| 摘要 |
An iron based product having at least a sufficient total ferrous content by weight to render the product commercially feasible wherein the product is derived by a process comprising the beneficiation of kish slag waste material having a relatively low ferrous material content before beneficiation. The resulting iron based product has a total ferrous content of substantially 90% by weight thereby making it both practical and economical for the reintroduction into iron and/or steel making processes utilizing an injection method or by briquetting at at least a portion of the resulting product. The beneficiation process involves the heating of the waste material to an extent at least sufficient for drying, separating the high sulphur slag from a remainder of the waste material and subsequently classifying the remainder of the waste material, once separated from the high sulphur slag by particle size. The classified, substantially larger particle size waste material is then ground until a predetermined range of particle sizes are present and until the general particle size of secondary material products with little or no ferrous content are reduced below the general particle size of the remaining primary iron based product which do not readily reduce in size under the grinding. Subsequently, the particles are again classified so as to remove and collect the primary iron based product particles that remain above a predetermined mesh size from the processed waste material.
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