ferro silicon 70
The carbonaceous reducing agents used to produce ferroalloys mainly include metallurgical coke, petroleum coke, pitch coke, bituminous coal and charcoal (or wood blocks). Among them, metallurgical coke is the most used, and the latter four are mainly used to produce industrial silicon. Bituminous coal and charcoal are often used in combination with metallurgical coke to produce calcium silicon alloys. In addition, carbonaceous reducing agents such as gas coal coke, semi-coke, silica coke and lignite coke have also been studied or tried. Generally, coke obtained by retorting at a temperature greater than 900°C is called high-temperature coke, and the retorting temperature is lower than 700°C. The coke obtained by C is called low-temperature coke or semi-coke. Compared with high-temperature coke, low-temperature coke has better chemical activity and larger specific resistance.
Low carbon ferrosilicon
ultra-low carbon ferrosilicon
