Development of the technology of scandium extraction from the ash-slag waste of Kansk-Achinsk brown coal burning

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:504694

Pashkov, G L; Mikhnev, A D ^[1]; Kontzevoi, A A ^[2]

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1. Russian Academy of Sciences, Krasnoyarsk (Russian Federation). Inst. of Chemistry and Chemico-Metallurgical Processes
2. Ministry of Fuel and Energetics, Krasnoyarsk (Russian Federation)

Kansk-Achinsk Brown Coal Basin is one of the largest of the world. The coals of separate fields of this Basin consists of an enhanced amount of rare-earth metals, scandium in particular. The results of the developments of efficient technologies for the extraction of this metal from the ash-slag waste of Kansk-Achinsk brown coal burning were discussed in the paper. A variety of the procedures was tested such as the sintering with the alkali followed by the treatment with water, the sintering with the sodium carbonate followed by the treatment with the HCl water solution, the extraction with HCl or sulphuric acids, etc. The extraction of other than scandium metals, such as Y, La, Nd, Yb, Gd, etc., were monitored as well. The scandium extraction with HCl solution was found to be the most appropriate procedure for the ash-slag studied. The kinetic parameters of the extraction with HCl were measured and the mechanism of the extraction process is discussed.

• OSTI ID: 504694
• Report Number(s): CONF-960954--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ASHES
BROWN COAL
EXTRACTION
GADOLINIUM
HYDROCHLORIC ACID
LANTHANUM
MATERIALS RECOVERY
NEODYMIUM
SCANDIUM
YTTERBIUM
YTTRIUM