The paper shows the design concept, operation onsite, problems caused and relative solutions to solve the problems for the automatic carburetting device in electric steelmaking in Xi ′ ning Steel Works. 阐述了西宁钢铁厂电炉炼钢自动增碳设备的设计思想,介绍了现场使用情况、出现的问题及具体解决办法。