Compressed carbon preforms contg. silica powder - for use as reducing agent in electrothermal processes

摘要

Carbon preforms made by compressing fine-particle carbon with 3-50 wt. % of silica dust and 5-25% water under pressures up to 150 kg/cm2. Used as reducing agent in electrochemical processes, e.g. in prodn. of silicon metal, ferro- or calcium-silicon. Waste prods. from other processes are re-used. No thermal sintering of the preforms or use of compacting aids is required.