关键词: 碳素铬铁水热法, 红矾钠, 纯碱

Abstract: Based on hydrothermal oxidizing reaction of high content carbon ferrochrome for manufacturing sodium chromate，the reaction product sodium chromate alkaline solution containing a small amount of free alkali was converted into sodium bichromate solution containing a small amount of sodium chromate，and meanwhile alkali consumption declined by 1/3，by taking full advantage of acidification and catalytic effect of carbon dioxide，and without adding equipment and raw material.Soda can be used to replace caustic soda in the reaction.Experiment results showed that sodium bichromate cost of applying high content carbon ferrochrome powder hydrothermal oxidizing reaction promises to be less than that of high-temperature chromite roasting.

Key words: hydrothermal oxidizing reaction, sodium bichromate dehydrate, soda