Naslov
The mechanism of nickel separation from carbon materials during high-temperature treatment, I. Study of ideal systems (graphite-NiO, graphite-NiS, NiS1.03, graphite-NiSO4, graphite-NiO, NiS, NiS1.03, NiSO4)

Autori
Ugarković, Dubravka ; Rađenović, Ankica ; Novosel-Radović, Vjera

Izvornik
Carbon (0008-6223) 31 (1993), 6; 903-911

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Carbon materials; chemical reactions with nickel compounds; high-temperature treatment (HTT)

Sažetak
The aim of the study was to determine the relationship between the types of chemical nickel compounds and the efficacy of nickel separation during the high-temperature treatment of ideal carbon systems: graphite-NiO, graphite-NiS, Nis1.03, graphite-NiSO4, and graphite-NiO, NiS, NiS1.03, NiSO4. The nickel compounds present were identified by X-ray diffraction before and after treatment of the samples at maximum temperatures of 1500°, 2000°, and 2400°C. Quantiative measurements of the nickel content showed a decrease in mass fraction with a rise in temperature. The same trend was true for the relative reflex intensities of the nickel compounds. During high-temperature treatment the chemical nickel compounds present were transformed to thermally more or less unstable forms, thus facilitating nickel separation.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija

POVEZANOST RADA