Green Diamond Performance Materials product Nickle Slag from their Riddle, Oregon plant. Boasting over 10 million tons in reserve, the slag is produced from magnesium orthosilicate, this means that the slag is very hard, reducing dust.
Your only real concern will be to watch the level of chromium’s.
Metallic slags are produced from the by-products of the refining process. Similar to coal slag, the molten slag is rapidly cooled and the resulting material is crushed and screened. While metallic slags are slightly harder than coal slag, their performance and inherent issues are basically the same.
Metallic slags are primarily used in the geographic regions where their base metals are refined.