Normally, silicon carbide is produced by heating sand (which is made of quartz, or silicon dioxide) in an electric furnace with carbon made from oil or coal.
To introduce the technology reform of oil burning open fire furnace. The heat treatment control principle of the open fire furnace and its adopting measures are introduced emphatically.
介绍燃油明火加热炉的技术改造，着重介绍明火加热炉热工控制的原理以及采取的措施。
3
Drop hardening: the process of dropping small cups and cones and all rollers directly from the drop hardening furnace into an oil bath which quenches them.