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    • 8. 发明专利
    • Recovery method of nickel salt from nickel-containing waste solution sludge
    • 从含镍废物溶液中回收镍盐的方法
    • JP2005015272A
    • 2005-01-20
    • JP2003181997
    • 2003-06-26
    • Astec Irie Co LtdNippon Steel Corp新日本製鐵株式会社株式会社アステック入江
    • EBA ATSUSHIKUSAKABE NOBUONAGASHIMA MASAKIYOSHINO HIROSHI
    • B01D9/02C01G53/00C01G53/10C02F11/00C22B3/44C22B7/00C22B23/00
    • Y02P10/234
    • PROBLEM TO BE SOLVED: To provide a method for recovering a nickel salt that is capable of recovering nickel in a high yield of approximately to 100% from nickel-containing waste solution sludge, treating with small consumption energy and reducing the exhaust amount of waste to environment such as reclamation, an aqueous area and the like to zero. SOLUTION: The method comprises dissolving a solid content by adding an acid to the nickel-containing waste solution sludge, then adding calcium carbonate thereto and removing iron-containing gypsum by adjusting the pH and performing filtration after oxidizing Fe 2+ among the iron content (Fe 3+ , Fe 2+ ) to Fe 3+ to form a nickel stock solution. Then, calcium hydroxide is added to the nickel stock solution to adjust the pH to form nickel-containing gypsum and the chlorine content is discharged to the outside of system. The method for recovering the nickel salt from the nickel-containing sludge is characterized by adding an acid to the nickel-containing gypsum to dissolve nickel hydroxide, recovering the nickel salt crystal by performing the cooling crystallization treatment to crystallize and performing the circulation treatment of the residual solution after the crystallization of the nickel salt crystal. COPYRIGHT: (C)2005,JPO&NCIPI
    • 待解决的问题:提供一种能够从含镍废液污泥中回收镍收获率高达100%的镍的方法,用少量能量处理并减少排气量 废物到环境如填海,水域等等。 解决方案:该方法包括通过向含镍废液污泥中加入酸溶解固体含量,然后向其中加入碳酸钙并通过调节pH并在氧化Fe 3 + ,Fe 2 + )至Fe 3 + 中的+ 以形成镍储备溶液。 然后,将氢氧化钙加入到镍储备溶液中以调节pH以形成含镍石膏,并将氯含量排出到系统外部。 从含镍污泥中回收镍盐的方法的特征在于向含镍石膏中加入酸以溶解氢氧化镍,通过进行冷却结晶处理回收镍盐晶体,结晶并进行循环处理 镍盐晶体结晶后的残留溶液。 版权所有(C)2005,JPO&NCIPI