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    LEACHING OF A TITANIFEROUS MATERIAL
    25.
    发明专利
    LEACHING OF A TITANIFEROUS MATERIAL 未知

    公开(公告)号：CA2187892A1

    公开(公告)日：1995-10-26

    申请号：CA2187892

    申请日：1995-04-18

    Applicant: TECH RESOURCES PTY LTD

    Inventor： MCCLELLAND ROSS ALEXANDER ,  HOLLITT MICHAEL JOHN

    IPC: C01G23/04 ,  C22B3/04 ,  C22B3/06 ,  C22B34/12 ,  C22B1/02

    Abstract: 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.

    ZIRCONIA BASED OPACIFIERS
    27.
    发明专利
    ZIRCONIA BASED OPACIFIERS 未知

    公开(公告)号：CA2165552A1

    公开(公告)日：1995-01-12

    申请号：CA2165552

    申请日：1994-06-30

    Applicant: TECH RESOURCES PTY LTD

    Inventor： LIDDY MATTHEW JON ,  MCCLELLAND ROSS ALEXANDER ,  HOLLITT MICHAEL JOHN

    IPC: C03C1/04

    Abstract: A process for producing a zirconia bearing opacifier is disclosed. The process comprises the steps of: (i) heat treatment of a zirconia bearing material comprising heating the zirconia bearing material in the presenoe of an additive to form a heat modified product having one or more phases which, when incorporated in a glaze and the glaze is fired, exhibit opacifying characteristics; and (ii) cooling the heat modified product to produce a product which can be used for imparting opacity.

    PROCESS FOR UPGRADING TITANIFEROUS MATERIALS
    28.
    发明专利
    PROCESS FOR UPGRADING TITANIFEROUS MATERIALS 未知

    公开(公告)号：CA2162266A1

    公开(公告)日：1994-11-24

    申请号：CA2162266

    申请日：1994-05-09

    Applicant: TECH RESOURCES PTY LTD

    Inventor： HOLLITT MICHAEL JOHN ,  MCCLELLAND ROSS ALEXANDER

    IPC: C22B34/12 ,  C22B3/06 ,  C22B3/12 ,  C22B5/12 ,  C09C1/36

    Abstract: A process for removing impurities from a titaniferous material that has been subjected to thermal reduction is disclosed. The process comprises the steps of: (i) subjecting the thermally reduced titaniferous material to a secondary heat treatment to convert it to a leachable form in which impurities present therein are more readily leachable; (ii) cooling the product of step (i); (iii) leaching the cooled heat treated titaniferous material in an aqueous acid solution that is capable of dissolving at least a portion of any impurities contained in the titaniferous material to form a leachate; and (iv) separating the leachate from the titaniferous material.

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