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SILMAK is a private company producing ferrosilicon.

The production facilities are located in Jegunovce, 45 km west from Skopje - the capital of the Republic of Macedonia.
The production of the ferrosilicon is conducted in 7 electro furnaces, through the following processes:
Preparation of the quartz (crushing and washing), melting,cooling and crashing of the ferrosilicon.
Main raw materials used by Silmak for the production of FeSi come from Macedonia and nearby countries. 50% of suppliers are situated in Macedonian.

Slightly over half of word consumption of ferrosilicon is used in cast irons, which contain between 1% and 3% silicon. Silicon reduces the stability of iron carbide in cast iron and promotes the formation of graphitic carbon by a process of inoculation. Cast iron output has been stagnant for a number of years because of declining use in automobile engines, and growth of continuous casting making redundant the use of iron ingot moulds in steel making.
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