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44 条记录 (耗时 0.014 秒)

    Preparation of aluminium fluoride from scrap aluminium cell potlinings
    32.
    发明公开
    Preparation of aluminium fluoride from scrap aluminium cell potlinings 失效
    氟化铝生产从废铝电解槽的衬里。

    公开(公告)号：EP0117616A1

    公开(公告)日：1984-09-05

    申请号：EP84300388.0

    申请日：1984-01-23

    申请人： ALCAN INTERNATIONAL LIMITED

    发明人： Lever, Gordon

    IPC分类号： C01F7/50 ,  C01D3/02 ,  C01B7/19

    CPC分类号： C01D3/02 ,  C01B7/191 ,  C01F7/50 ,  C25C3/08

    摘要： Fluoride-containing wastes, arising in the aluminium industry, particularly spent cell linings from reduction cells, are digested with caustic soda for conversion of sodium cryolite to NaF.
    By use of very strong caustic soda NaF may be left in the solid residues after removal of the residual liquor and recovered from such residues by water leaching.
    As an alternative weaker caustic soda may be used in the digestion stage and subsequently be crystallised out from the residual liquor, after separation from the solid residues, by evaporating and/or cooling the liquor. The precipitated NaF is then conveniently redissolved in water.
    The NaF solution prepared by either route is then preferably subjected to electrodialysis to recover a solution of HF from it. Such HF is conveniently converted to AIF 3 by reaction with alumina.

    HIGH VALUE-ADDED METHOD FOR RESOURCE RECOVERY FROM LITHIUM SLUDGE AND FLUORIDE SLUDGE
    33.
    发明公开
    HIGH VALUE-ADDED METHOD FOR RESOURCE RECOVERY FROM LITHIUM SLUDGE AND FLUORIDE SLUDGE 审中-实审

    公开(公告)号：EP4368574A1

    公开(公告)日：2024-05-15

    申请号：EP22837916.0

    申请日：2022-07-04

    申请人： KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES

    发明人： RYU, Taegong ,  SHIN, Junho ,  JEONG, Jae-Min

    IPC分类号： C01D15/04 ,  C01D3/02 ,  H01M10/54

    CPC分类号： Y02W30/84 ,  Y02P10/20 ,  C01D3/02 ,  C01D15/04 ,  H01M10/54

    摘要： The present invention provides a high value-added method for resource recovery from lithium sludge and fluoride sludge, and an economic sludge treatment method, wherein lithium fluoride (LiF), which is an insoluble lithium compound, is prepared by reacting lithium sludge with fluoride sludge, and then Li-Al layered double hydroxide (LI-Al LDH), which is an insoluble lithium compound, is prepared by reacting reaction filtrate with an aluminum compound, after which a conversion product is prepared by a sulfation reaction of the Li-Al layered double hydroxide (LI-Al LDH), which is an insoluble lithium compound, with a sulfuric acid compound, a lithium concentrate is prepared by leaching the conversion product with water, and then the lithium concentrate is recirculated as a lithium raw material to efficiently and economically recover lithium ions contained in the lithium sludge, or lithium fluoride (LiF) is prepared, and then lithium ions and fluoride ions are economically recovered from lithium sludge and fluoride sludge via additional precipitation/separation of lithium fluoride through the mechanical vapor recompression (MVR) of the reaction filtrate, and trace amounts of fluoride ions contained in the filtrate are reacted with a calcium compound to separate the filtrate into calcium fluoride precipitate and residual process water and discharge a small amount thereof.

    Method for cyclically preparing titanium sponge and coproducing sodium cryolite using sodium fluotitanate as intermediate material
    36.
    发明公开
    Method for cyclically preparing titanium sponge and coproducing sodium cryolite using sodium fluotitanate as intermediate material 有权
    一种用于海绵钛和同时生产冰晶石钠与Natriumfluotitanat的环状制备作为中间材料的方法

    公开(公告)号：EP2631309A1

    公开(公告)日：2013-08-28

    申请号：EP12195384.8

    申请日：2012-12-04

    申请人： Shenzhen Sunxing Light Alloys Materials Co., Ltd

    发明人： Chen, Xuemin ,  Yu, Yueming ,  Ye, Qingdong ,  Yang, Jun ,  Zhou, Zhi ,  Chen, Xinyi

    IPC分类号： C22B34/12

    CPC分类号： C22B34/12 ,  C01D3/02 ,  C22B34/1277 ,  Y02P10/212

    摘要： The disclosure discloses a method for cyclically preparing titanium sponge and coproducing sodium cryolite using sodium fluotitanate as an intermediate material, which includes the following steps: A) adding hydrofluoric acid to titaniferous iron concentrate to enable a reaction to form fluotitanic acid; B) adding sodium carbonate and sodium hydroxide to the fluotitanic acid to enable a reaction to form the sodium fluotitanate; C) putting the sodium fluotitanate into a reactor, adding aluminium to react with the sodium fluotitanate to form the titanium sponge and sodium cryolite; or, putting the aluminium into the reactor, adding the sodium fluotitanate to react with the aluminium to form the titanium sponge and sodium cryolite; D) extracting the sodium cryolite and sending it to a rotary reaction kettle together with concentrated sulphuric acid to enable a reaction to form hydrogen fluoride gas and sodium sulphate, aluminium sodium sulphate; collecting the hydrogen fluoride gas and dissolving it into water to obtain a hydrofluoric acid solution; E) recycling the obtained hydrofluoric acid to Step A to leach the titaniferous iron concentrate. The disclosure can recycle the coproduct sodium cryolite, thereby shortening the process of preparing titanium sponge, reducing the comprehensive cost of production, improving the production efficiency and reducing environmental pollution.

    摘要翻译： 本公开盘松的方法用于循环制备海绵钛以及使用fluotitanate钠作为中间材料，其包括以下步骤联产钠冰晶石：A）加入氢氟酸以含钛铁精矿，以使反应以形成氟钛酸; B）加入碳酸钠和氢氧化钠的氟钛酸，以使一个反应形成fluotitanate钠; C）把fluotitanate钠到反应器中，添加铝与fluotitanate钠反应以形成海绵钛和钠冰晶石; 或者，把铝进入反应器，加入钠fluotitanate到与铝反应以形成所述海绵钛和钠冰晶石; D）提取钠冰晶石和其与浓硫酸一起发送到旋转式反应釜中，以使反应形成氟化氢气体和硫酸钠，硫酸铝钠; 收集氟化氢气体，并将其溶解在水中以获得氢氟酸溶液; E）回收获得的步骤A到浸出含钛的铁精矿的氢氟酸。 本发明可以回收副产物冰晶石钠，从而缩短准备海绵钛，降低了生产成本全面，提高生产效率和减少环境污染的过程。