As part of the U.S. Bureau of Mines program to reduce U.S. reliance on foreign supplies of critical and essential metals, Bureau researchers have conducted studies to improve technology for recovering critical and essential metals from superalloy scrap (sas). This report describes a combined pyro- and hydro- metallurgical process for recovering high-purity cobalt and nickel from sas. Pyrometallurgical pretreatment simplifies subsequent hydrometallurgical procedures by altering the scrap matrix through carburization of the more refractory sas constituents. The hydrometallurgical treatment involves electrodissolution of carburized sas anodes in a novel Bureau-developed double-membrane electrolytic cell (dmec). The resulting anolyte is treated by a series of hydrometallurgical procedures to produce a purified cobalt chloride solution. This solution is utilized as a catholyte in a dmec to win high-purity cobalt. Laboratory tests have produced cobalt cathodes meeting National Stockpile Specification P13-R6, for grade a cobalt. Additional test work has produced high-purity nickel in a dmec.
2nd Int'l. Symp.--recycling of Metals & Engineered Materials. TMS, PP. 145-157
We take your privacy seriously. You can review and change the way we collect information below.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
Cookies used to make website functionality more relevant to you. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests.
Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data.
Cookies used to enable you to share pages and content that you find interesting on CDC.gov through third party social networking and other websites. These cookies may also be used for advertising purposes by these third parties.