国家/地区 中国（2）
IPC部 C（2）
IPC大类 C22（2）
IPC小类 C22B（2）
IPC C22B034/22（2）
发明人 ZHANG C（2）
公开年 2021（2）
申请年 2021（2） 
专利权人 HUNAN ZHONGX.（2）

Increasing nitrogen content of vanadium iron nitride used for e.g. high-strength thread steel, involves mixing vanadium source, carbonaceous reducing agent, iron powder, and tin dioxide, ball milling, vacuumizing, introducing mixed gas of nitrogen and ammonia and heating.

ZHANG C

Production of vanadium-aluminum alloy comprises acid leaching vanadium slag, removing iron, adding potassium hydroxide solution into acidolysis liquid, ball milling vanadium containing filter residue, mixing with dilute sulfuric acid solution and carrying out thermal reduction.

ZHANG C