奧托昆普哈賈瓦爾塔精煉廠鎳電解工藝-(1)

1、1NickelelectrolysisprocessatOutokumpuHarjavaltaMetalsOy奧托昆普哈賈瓦爾塔金屬公司鎳電解工藝奧托昆普哈賈瓦爾塔金屬公司鎳電解工藝AbstractThispaperdealswiththeelectrolysisofnickelfromsulphatesolutionitselectrochemicalprinciples.Asanexamplethenickelelectrolysi

2、sprocessatOutokumpuHarjavaltaMetalsOyisdiscussedinmedetail.Theleachingofnickelmattethepurificationofthenickelsulphatesolutionpritoelectrolysisisalsodiscussed.Inadditionashtreviewofotherhydrometallurgicalnickelmattetreatm

3、entprocessesnickelelectrolysistechnologiesisgiven.摘要：摘要：本論文主要研究了硫酸鎳溶液的電解過(guò)程及其電化學(xué)原理。作為例子，本論文主要在細(xì)節(jié)方面討論了奧托昆普哈賈瓦爾塔金屬公司的鎳電解過(guò)程。同時(shí)也討論了電解過(guò)程之前的鎳浸出及凈化過(guò)程。除此之外，其它鎳濕法冶金處理過(guò)程及電解技術(shù)也在文中涉及到。OutokumpuhasproducedelectrolyticnickelatHarjavait

4、awkssince1960.Nickeliselectrowonfromanickelsulphatesolutionusingdiaphragmcellswhereadiaphragmclothisusedtopreventthecatholytesolutiontheacidicanolytefrommixing.Nickelisdepositedonthinnickelstartersheetstheanodesareofunal

5、loyedlead.Thecurrentdensityis200Am2thedepositiontimeissevendays.Theready3液在新的溶劑萃取工序處理，并產(chǎn)出純凈硫酸鎳溶液用來(lái)進(jìn)行電解和氫還原。鎳廠生產(chǎn)能力為18000ta的電解鎳和22000ta的鎳磚。1.IntroductionNickelisanimptantalloyingelementinthemetalindustry.Methan70%ofthenick

6、elisconsumedinstainlessalloyingsteels1.Othermainusesofnickelarenonferrousalloys(11%)crosionresistantdecativeplatedcoatings(8%).Thewldprimarynickeldemwas928000tonsin19962.1、簡(jiǎn)介、簡(jiǎn)介鎳是金屬工業(yè)中一種非常重要的元素。超過(guò)70%的鎳消費(fèi)于不銹鋼行業(yè)和合金行業(yè)（文獻(xiàn)1）。

7、鎳的其它用途有非鐵合金（11%）和防腐蝕以及裝飾性電鍍（8%）。在1996年，全球鎳需求量為92.8萬(wàn)噸年（文獻(xiàn)2）。Nickelisrefinedfromsulphidelateritees.About60%ofthenickelisminedfromsulphidedeposits40%fromlateritedeposits3.Inlateriteesnickelisboundinironoxidesilicacompoundsf

8、romwhichitisdifficulttoupgrade.Therefedirectsmeltingofeisgenerallyusedtoproduceferronickelnickelmatte.Directleachingoflateritewithammoniasulphuricacidisalsoused.Studiesonthehydrometallurgicalprocessingoflateriteeshavebee