对提高铬铁粉中铬含量制取铬的方法进行了实验室规模的研究,整个过程包括将铬铁粉氮化以形成 Fe_4N 和 CrN,这两种物质分别以独立的相存在。在酸性溶液中,Fe_4N 很容易反应,而在某些条件下,CrN 却是惰性的。这就提供了一种除去铁的方法。浸出处理后,CrN 能在适当的真空条件下,于高温中分解以产出含有2%的铁和小于0.o5%氮的铬。 A laboratory-scale study was carried out on the method of increasing the chromium content in ferrochrome powder for the production of chromium. The whole process involved the nitriding of ferrochromium powder to form Fe 4 N and CrN, which exist as separate phases. In acidic solution, Fe 4 N is very easy to react, while under certain conditions, CrN is inert. This provides a method of removing iron. After leaching, CrN can be decomposed at elevated temperatures under appropriate vacuum to produce chromium with 2% iron and less than 0.5% nitrogen.