| 摘要 |
<p>The invention relates to a process for producing an artificial iron ore suitable as a raw material in iron and steelmaking, which process comprises the steps of (1) treating a waste material containing iron with an aqueous alkaline material at pH > 7 for a time sufficient to convert at least a part of any silica contained within the waste to silicate; (2) mixing the treated waste with silica and/or a silicate and optionally further waste materials and/or fillers to form a mixture containing at least about 50 % (dry weight) of iron; (3) forming the mixture into a shape; and (4) allowing the shaped mixture to harden to thereby form an artificial iron ore. The invention also relates to a method for producing a solid calcium and/or magnesium containing feed for an iron or steel making process, which method comprises the steps of (1) mixing limestone or dolomite fines or fly ash with silica and/or a silicate and with iron oxide or a compound of iron, and optionally further waste materials and/or fillers; (2) forming the mixture into a shape; and (3) allowing the shaped mixture to harden to thereby form a solid calcium and/or magnesium containing feed.</p> |
