JAKARTA (Reuters) - Nasagna production in the first half of 2017 was 37,331 tonnes, up from 36,256 tonnes in the same period in 2016, Vale Indonesia said in a statement Monday.

Nickel matte is a nickel matte ore，the matte is a melt of various metal sulfides produced during the smelting process of nonferrous metals, composed of low-cost sulfide metal, which enriches some metal and precious metals to be extracted.