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Fig. 1The ow of tungsten recycling process by zinc treatment
method.

Fig. 2(left) before zinc treatment, (right) agter zinc treatment.

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úËõ Sept. 2014 Vol.27 No.5  253(C) 2014 The Japanese Society for Synchrotron Radiation ResearchFig. 3The ow of tungsten recycling process by wet­chemical treat­ment method.

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W L1_XANES spectrum of aqueous solution obtained withow cell. (a) With preliminary designed ow cell. (b) Fourtimes averaged spectrum of spectrum (a). (c) With im­proved ow cell.

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Fig. 10 ÉCIð·ÑÌæ[tßÌ W L1_XANES ªèÔðwWÆµÄè·é±ÆªñíÉLø©ÂdvÅ éBFig. 8

An example chart of pH and tungsten chemical state change
after pH adjustment.

256  úËõ Sept. 2014 Vol.27 No.5

Fig. 9Layout of XAFS measurement of the ion exchange process.

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Tungsten L1_XANES spectrum during ion exchangeprocess.

CIÌóÔð]¿µCvZXðÌÅK»À{µ½B±êÉæèCø¦Ì^OXeTCNvZXÌJ­ðx·é±Æªo½àÌÆl¦Ä¢éBÊð¦·B±ÌÌæÉ¨¢Ä W L1 _XANES ÌvGÓ«{¤Í JOGMECiÆ§s­@l ÎûVRKXÉàbW­xªCIð·ÑÌæ[ÙÇå«­ÈÁÄ¢é±Æªí © é B ±ê Í CI  ð ·Ì Å æ [Ì  ª ÅÍ W12®z¨¹@\jÌxðó¯CÀ{³ê½àÌÅ

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W12O10|41 i|_jÆµÄz1)
2)

S. K. Tangri et al.: Trans. Indian Inst. Met. 51, 27 (1998).
S. Yamazoe et al.: J. Phys. Chemi. C, 112, 6869 (2008).

ªsíêÄ¢é±ÆðmF·é±ÆªÅ«½BÒÐîÑ´4.

ÜÆßXAFS @ðp¢Änt¨æÑCIð·÷Ì^OXe_CIÌóÔðÍðÂ\Æµ½B^OXe
_CIÌóÔÆµÄCm_C|_ÌÏ»ÉÚµCCIð·vZXÉÖíé^OXe_CIÌóÔÏ»ðÇÕµCvZXðÌèÉpµ½B

ZFdH ðÍZp¤Z^[ å²E­mail: junji­iiharasei.co.jpmªðn
1993N 3 kåww¤È»wêUmÛöI¹BmiwjB1993N 4  ü Ð B 1997 N 4  © çZFdCHÆò1999N 3 ÈwZp¡à®Þ¿¤ÁÊ¤¯±Bá¦ÎCpH ²®ãÌtÌÀè«]¿ÉÖµÄÍCpHDevelopment of tungsten recycling process withsynchrotron analysis
Junji IIHARA
Abstract

Sumitomo Electric Ind., Ltd.
1_1_3, Shimaya, Konohana­ku, Osaka 554_0024, Japan

A cemented carbide recycling system with an energy saving and a low environmental load was es­
tablished for securing stable Tungsten resource. The poly­tungsten ion was used for the highecient ion­exchange process, which is one of the important processes. The chemical state oftungsten ion was analyzed with XAFS in order to improve the recycling process conditions.

úËõ Sept. 2014 Vol.27 No.5  257