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Method for comprehensively recovering multiple elements from zirconium oxychloride liquid waste

A technology of zirconium oxychloride and waste liquid is applied in the field of comprehensive utilization of recycling zirconium oxychloride waste liquid, which can solve the problems that various minerals cannot be effectively recycled and utilized.

Active Publication Date: 2015-02-11
HUNAN RARE EARTH METAL MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for comprehensively recovering various elements from zirconium oxychloride waste liquid, so as to solve the technical problem that various minerals in zirconium oxychloride waste liquid cannot be effectively recycled and utilized in the prior art

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  • Method for comprehensively recovering multiple elements from zirconium oxychloride liquid waste
  • Method for comprehensively recovering multiple elements from zirconium oxychloride liquid waste

Examples

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Effect test

Embodiment 1

[0067] 1.1 Iron and uranium removal: configure the organic phase I according to the ratio of 20vol% N235, 20vol% 2-octanol, and 60vol% 260# solvent oil; the zirconium oxychloride waste liquid and the organic phase I are according to the volume ratio O / A=1 : 3 ratio for extraction, through 4 stages of extraction, each extraction time is 5 minutes, to obtain raffinate I and loaded organic phase I, the extraction rate of uranium reaches 99.1%, and the extraction rate of iron reaches 97.5%. The proportions of each substance contained in the used zirconium oxychloride waste liquid are listed in Table 1. The zirconium oxychloride waste liquids used in Examples 1 to 4 are all listed in Table 1.

[0068] 1.2 Re-extract iron and uranium on the loaded organic phase I: mix the loaded organic phase I with N235 according to the volume ratio O / A=3:1, then use water and ammonium carbonate solution for back-extraction, after 6 stages of back-extraction , and the time for each level is 5 minu...

Embodiment 2

[0089] 2.1 Iron and uranium removal: Use N235 to remove iron and uranium: configure the organic phase I according to the ratio of 30vol% N235, 10vol% 2-octanol, and 60vol% 260# solvent oil; mix the zirconium oxychloride waste liquid with the organic phase I is extracted according to the ratio of volume ratio O / A=1:5, through 6 stages of extraction, each stage of extraction time is 7 minutes, to obtain raffinate I and loaded organic phase I, the extraction rate of uranium reaches 98%. The extraction rate reaches 96.5%.

[0090] 2.2 Re-extract iron and uranium on the loaded organic phase I: mix the loaded organic phase I with N235 according to the volume ratio O / A=3:1, then use water and ammonium carbonate solution for back-extraction, after 6 stages of back-extraction , and the time for each level is 5 minutes to obtain the iron stripping solution and the uranium stripping substance, which are respectively subjected to alkali precipitation to obtain the iron-enriched substance ...

Embodiment 3

[0111] 3.1 Iron and uranium removal: Use N235 to remove iron and uranium: configure the organic phase I according to the ratio of 40vol% N235, 5vol% 2-octanol, and 55vol% 260# solvent oil; combine the zirconium oxychloride waste liquid with the organic phase I is extracted according to the ratio of volume ratio O / A=1:5, and the extraction time is 12 minutes after 8 stages of extraction, and the raffinate I and the loaded organic phase I are obtained. The extraction rate of uranium reaches 97.56%, and the extraction rate of iron reaches 95.47%. .

[0112] 3.2 Re-extract iron and uranium on the loaded organic phase I: mix the loaded organic phase I with N235 according to the volume ratio O / A=1:1, then use water and sodium carbonate solution for back-extraction, and go through 6 stages of back-extraction , and the time is 15 minutes to obtain the iron stripping solution and the uranium stripping substance, which are subjected to alkali precipitation respectively to obtain the iro...

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Abstract

The invention provides a method for comprehensively recovering multiple elements from zirconium oxychloride liquid waste. The method comprises the following steps: (1) removing iron and uranium on zirconium oxychloride; (2) gathering scandium and thorium; (3) preparing a high-purity scandium oxide; and (4) gathering rare earth, zirconium and titanium. According to the method provided by the invention, through reasonable configuration of the recovering order of various elements from the zirconium oxychloride liquid waste, scandium enrichment capable of improving the purity by a subsequent purification method can be obtained just by virtue of a cheap extracting agent; and the adverse effects on purity improvement of the subsequently obtained scandium caused by irremovable zirconium and titanium, and radioactive elements thorium and uranium are avoided.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of recovered zirconium oxychloride waste liquid, in particular to a method for comprehensively recovering various elements from zirconium oxychloride waste liquid. Background technique [0002] Rare earth elements refer to lanthanide elements and scandium and yttrium elements closely related to them. Rare earth elements are widely used in the manufacture of functional materials and are key elements for the development of high-tech industries. Some people believe that with the continuous development and utilization of rare earth elements, a new technological revolution will be triggered on a global scale. In the early days, due to the low level of separation, purification, production and application of rare earth elements, rare earth elements were only used as industrial "monosodium glutamate". With the advancement of technology, rare earth elements have now been used in large quantities to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B59/00C22B60/02C22B34/12C22B34/14
CPCY02P10/20
Inventor 欧阳宇平刘宇晖吴希桃毛鹏罗矿林
Owner HUNAN RARE EARTH METAL MATERIAL RES INST
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