About Industrial Silicon

Industrial silicon composition, use and smelting process introduction

Ferrosilicon: 

The alloy of silicon and iron, with 45%, 65%, 75#% and 90% grades according to the silicon content.

Ferrosilicon Uses:

Silicon and oxygen are easily combined into silica.

Therefore, ferrosilicon is often used as a deoxidizer in steelmaking. 

At the same time, since a large amount of heat is released when SiO2 is formed, it is also beneficial to increase the temperature of molten steel at the same time as deoxidation.

Ferrosilicon is used as an alloying element additive. 

It is widely used in low-alloy structural steel, bonded steel, spring steel, bearing steel, heat-resistant steel and electrical silicon steel. 

Besides, ferrosilicon is often used as a reducing agent in ferroalloy production and chemical industry.

The silicon content reaches 95%--99%.

Pure silicon is commonly used to manufacture single crystal silicon or to formulate non-ferrous metal alloys.

Ferrosilicon Smelting:

Ferrosilicon is made of coke, steel scrap, quartz (or silica) as raw materials and smelted by electric furnace.

When refining ferrosilicon, silicon is reduced from silica containing SiO2.

Metallurgical coke is mostly used as a reducing agent for smelting ferrosilicon, and steel scrap is a regulator for ferrosilicon.

In the steelmaking industry, about 3~5kg75#% ferrosilicon is consumed per ton of steel produced.

Raw Material Requirements:

The raw materials for smelting industrial silicon include silica, coke, steel scraps, and electrode paste.

Silica is required to contain Si02≥97%, Al203≤1.0%, good thermal stability, no mud, particle size 20~80mm.

The coke is required to contain fixed carbon of not less than 84%, ash content of less than 15%, S<0.6%, and particle size of 3~-20mm.

Electrode paste ( In line with YB/T5212-2004 electrode paste standard )

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