Milled Ferrosilicon powder, also known as milled FeSi, is a specific form of ferrosilicon powder produced by grinding and milling larger ferrosilicon particles. It's particularly used in dense medium separation (DMS) processes, where it's combined with water to create a dense suspension for separating minerals based on density differences
Here's a more detailed explanation:
Production:
Ferrosilicon is an alloy primarily made of iron and silicon.
Milled ferrosilicon is created by crushing and milling oversized particles from the ferrosilicon production process.
The process usually involves melting steel scrap and silicon in an induction furnace, followed by atomization and cooling.
The oversized particles are then milled to achieve specific particle sizes.
Grades and Specifications:
Milled ferrosilicon is available in various grades, categorized by particle size distribution (PSD), such as 65D, 100D, 150D, 270D, and 270F.
Different grades are chosen based on the specific needs of the separation process, including the desired cut point and the stability of the dense medium.
Milled ferrosilicon 15% is a specific type with a defined chemical composition (FeSi15#), including 14-16% silicon and 80-83% iron, with trace amounts of other elements.
It is important to select the appropriate grade of milled ferrosilicon to ensure optimal separation performance.