Nickel and Cobalt Refining at Niihama Nickel Refinery

Exchange Coupling at Cobalt/ Nickel Oxide Interfaces

Nickel and Cobalt Ores: Flotation

Most of the world’s nickel is extracted from the mineral pentlandite, (Ni, Fe)9S8, which frequently occurs in ores containing predominantly pyrrhotite and various non-sulRdes, some of which contain magnesium (Table 1). The nickel content in such sulRde ores is generally low (0.2}3%) and varies from place to place in the same deposit. The low nickel content of the present-day nickel sulRde ores ...

Mortality of workers at a nickel carbonyl refinery, 1958-2000.

BACKGROUND Excess risks of respiratory cancer have been shown in some groups of nickel exposed workers. It is clear, however, that not all forms of nickel exposure are implicated in these excess risks. AIM To determine whether occupational exposures received in a modern nickel carbonyl refinery lead to increased risks of cancer, in particular nasal cancer and lung cancer. METHODS The mortal...

Genotoxicity of samples of nickel refinery dust.

At the International Nickel Company (INCO) nickel refinery in Clydach, Wales, U.K., which has operated since 1901, 365 respiratory cancers, including 85 nasal cancers and 280 lung cancers, have occurred in workers since the 1920s. From 1901 to 1923, incidences of these cancers were high. In 1923, the refining process was changed, eliminating a nickel arsenide, Ni5As2, called orcelite, from the ...

Nickel, cobalt and chromate sensitization and occupation.

BACKGROUND Exposure to nickel, cobalt and chromate are important causes of occupational contact dermatitis. OBJECTIVES To estimate the prevalence of nickel, cobalt and chromate allergy in a population of consecutive patients and to investigate the possible association with individual and occupational risk factors. PATIENTS/METHODS A total of 14 464 patients (67.6% women and 32.4% men) with ...