Netherrack Dust

Netherrack Dust is obtained by grinding

Netherrack using either
Grinder or Industrial Grinder.

Grinder - Techreborn:netherrack Dust

Industrial Grinder - Techreborn:netherrack Dust

It can also be crafted from 4x Small Pile Of Netherrack Dust
using a

Crafting Table.

Crafting Table - Techreborn:netherrack Dust

It can be used in the Industrial Centrifuge to obtain:

Industrial Centrifuge - Minecraft:redstone