SHANGHAI, May 22 (SMM) - Cobalt sulphate prices rose slightly last week. After sharp price declines, brisk transactions two weeks ago encouraged cobalt sulphate smelters to raise quotations last week. Traders were eager to make inquiries. Some ternary precursor plants intended to restock after demand improved, but rising cobalt sulphate prices somehow deterred them. After cobalt sulphate prices rebounded, it has become less cost effective to produce Co3O4 with cobalt sulphate. Cobalt sulphate prices may extend slight increase this week.
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