PT Vale Indonesia's nickel matte production fell nearly 19.5% in the second quarter compared to the same period last year, due to planned maintenance, the company said in a filing to the Indonesia stock exchange on Monday. Nickel matte output stood at 15 048 t, the company filing showed, down from 18 701 t/y earlier and 150 t lower than in the first quarter. "Production volume in Q2 2021 was lower...mainly due to several planned maintenance executed in t...