Process for the production of silicon or ferrosilicon in an electric low shaft furnace, and rawmaterial mouldings suitable for the process

Abstract From the Canadian patent

A process for the production of silicon in an electric low shaft furnace, in which raw-material blanks containing fine-grain silicon dioxide are formed first, e.g. in the form of sand and carbon in excess in respect of, the reduction to silicon carbide plus the raw-material blanks are introduced into the low shaft furnace as a charge in admixtures with silicon dioxide in lump form. The silicon dioxide in the raw-material blanks is reduced to silicon carbide in an upper part of the electric low shaft furnace at a temperature below 1600°C and coke structure agglomerates are formed from the excess carbon of the raw material blanks. In a lower part of the electric low shaft furnace, the silicon …