Soderberg Electrode Paste for Ferronickel/Ferrosilicon/Silicon Metal Der

Brief introduction:

Ferrosilicon powder is a powder made of ferrosilicon, mainly composed of silicon and iron and a small amount of impurities, mainly used in steelmaking and casting.

Ferrosilicon powder (containing approx. 15% Si) for constitution of heavy media is used today in many separation plants treating iron and other ores. The production of the powder by grinding is expensive. A new process atomizes the still molten ferrosilicon by air or steam. In a heavy medium this atomized ferrosilicon powder has several remarkable properties: The round form and smooth and shining surface of the individual grain offers greater resistance to corrosion, especially as no contamination is produced between iron and silicon during the process. The viscosity of the heavy media pulp for the same weight of pulp is less than for ground ferrosilicon, i. e. for the same viscosity a greater pulp density can be attained. This might be of importance in future. Adhesionloss is lower for atomized ferrosilicon. The strength of the atomized powder is equal to that of the ground powder.

The use of ferrosilicon powder has risen with the increasing employment of heavy media separation for ores, particularly in the separation of iron ores. In the separation of lead and zinc ores, ferrosilicon is a foreign body and the use of galena as a heavy medium would seem indicated; yet ferrosilicon has largely replaced galena for this work. The reason for it is that ferrosilicon possesses good magnetic properties which can be used to recover it from fouled medium. Galena can only be recovered by flotation. In contradistinction to other heavy media like magnetite, ferrosilicon has the advantage of a high specific gravity and of greater hardness.

Features and usage:

* Ferrosilicon is often used as deoxidizer in steel- making and iron-making.

* Ferrosilicon also can be used as alloy elements join agent, which is widelyused in low alloy steel, non-ferrous metal, bearing steel, heat-resistantsteels and electrician silicon-steel.

* Ferrosilicon commonly used as a reductant in ferroalloy production and chemicalindustry.

* In iron industry it often used as inoculant and nodulizer and deoxidize.