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首页> 外文会议>ALTA Uranium Conference >APPLICATION OF WINTRAY EXTRACTION COLUMN TO A DIRECT URANIUM SOLVENT EXTRACTION PROCESS
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APPLICATION OF WINTRAY EXTRACTION COLUMN TO A DIRECT URANIUM SOLVENT EXTRACTION PROCESS

机译：Wintray提取柱在直接铀溶剂提取过程中的应用

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Large-scale uranium hydrometailurgical processing with low grade uranium ore has been carried out, not by the direct solvent extraction (DSX) method, but by the ion exchange (IX) + solvent extraction (SX) method (Eluex). This is because the DSX method with mixer-settlers requires a much higher investment cost than Eluex, and the DSX method with a conventional column cannot be operated at a high A/0 (ratio of aqueous flow rate to the organic flow rate) values. However, a number of WINTRAY? (hereinafter referred to as "the WINTRAY") extraction columns, developed by JGC for use in stage-type extraction columns, have been constructed in the petrochemical and coal chemical industries, and their high throughput, high efficiency and high resistance to scum have been demonstrated. The application areas have been extended from the hydrocarbon field to non-ferrous hydrometallurgy. This time, the uranium extraction test with a rectangular WINTRAY column (width of 100 mm, depth of 40 mm and effective extraction height of 4.9 m) from low uranium concentration (300 ppm) PLS by Alamine 336 + Iso-decanol + SHELLSOL D70 was conducted at MINTEK in the Republic of South Africa. A uranium extraction percentage of 95% was obtained at A (PLS) / O (10%Alamine) = 15, and with twice extraction, a uranium extraction percentage of more than 99% was achieved at A/O=20. Although the PLS was like muddy water, by being spiked with a high content of silica and nitrate ions and having a suspended solid concentration of 80-180 ppm, stable operation was maintained at total flux of 70 m~3/m~2/hr, and it was not affected by the small amount of scum that accumulated near the liquid-liquid interface at the bottom of the column. A loaded solvent with a high uranium concentration can be directly produced from the PLS of 300 ppm uranium by an industrial-size WINTRAY column. Also, by utilizing the loaded solvent generated by the WINTRAY extraction test, stripping tests using a batch countercurrent scheme were conducted at a laboratory in MINTEK to obtain design data on the stripping system using a mixer-settler cascade. The results of tests were utilized for scaling up the plant to industrial size and for a ballpark cost comparison between WINTRAY DSX process and conventional Eluex process, and confirmed that the WINTRAY DSX process can dramatically reduce CAPEX (capital expenditure) and OPEX (operating expenditure), compared with the Eluex process.
机译：已经进行了具有低级铀矿石的大规模铀水道局部加工，而不是通过直接溶剂萃取（DSX）方法，而是通过离子交换（IX）+溶剂萃取（SX）方法（Eluex）。这是因为具有混合器定位器的DSX方法需要比Eluex更高的投资成本，并且具有常规柱的DSX方法不能以高A / 0（水流量与有机流速的比率）值。但是，许多Wintray？ （以下称为“Wintray”）提取塔，由JGC开发用于阶段型提取塔，已在石化和煤化工工业中构建，以及它们的高吞吐量，高效率和高抗浮渣的抵抗力展示。应用领域已从烃场延伸至有色金属冶金。这一次，铀提取试验用矩形WINTRAY柱（宽度为100mm，深度为40mm，有效的萃取高度为4.9米）由alamine 336 + ISO-癸醇+ Shellsol D70的低铀浓度（300ppm）PLS在南非共和国的Mintek进行。在（PLS）/ O（10％alamine）= 15中获得铀提取率为95％，并用两次萃取，在A / O = 20下达到超过99％的铀提取率。虽然PLS就像泥水一样，通过掺入高含量的二氧化硅和硝酸根离子并具有80-180ppm的悬浮固体浓度，保持稳定的操作，总通量保持在70m〜3 / m〜2 / hr ，并且它不受少量浮渣的影响，该含量在柱底的液体液体界面附近。具有高铀浓度的负载溶剂可以通过工业大小的WintRay柱从300ppm铀的PLS直接生产。此外，通过利用由WintRay提取测试产生的负载溶剂，在Mintek的实验室进行使用批量逆流方案的剥离测试，以获得使用混合器沉降器级联的剥离系统的设计数据。测试结果用于将工厂扩大到工业规模，并在WintRay DSX过程和常规Eluex过程之间进行球场成本比较，并确认WintRay DSX过程可以大大降低资本支出（资本支出）和OPEX（运营支出） ，与Eluex过程相比。

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