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    • 5. 发明公开
    • EP0755459A4 -
    • EP0755459A4 - Google专利
    • EP0755459A4
    • 1997-02-26
    • EP95915693
    • 1995-04-18
    • C01G23/04C22B3/04C22B3/06C22B34/12C22B1/00
    • C22B34/124C22B3/06C22B34/1209C22B34/1213Y02P10/234
    • An industrially realistic process for upgrading of titaniferous materials is disclosed. The process comprises the following steps: (i) a pretreatment which has the effect of rendering silica amenable to leaching under the particular conditions of a subsequent leach, and (ii) an aqueous leach in the presence of an acid, the conditions of which are chosen such that silica which enters solution is not hydrolysed or precipitated as a silicate. The pretreatment step (i) may comprise alkaline leaching, roasting or smelting. The leaching step (ii) may be conducted at low solids densities.
    • 公开了一种工业上现实的用于提升含钛材料的方法。 该方法包括以下步骤:(i)预处理,其具有使二氧化硅易于在随后浸出的特定条件下浸出的效果,和(ii)在酸存在下的水浸出物,其条件是 选择使得进入溶液的二氧化硅不被水解或沉淀为硅酸盐。 预处理步骤(i)可以包括碱浸,焙烧或熔炼。 浸提步骤(ii)可以在低固体密度下进行。