用酸洗废液中析出的硫酸亚铁制备饲料添加剂

在机械制造厂的毛坯车间或钣金车间，常用硫酸清洗金属元件表面的铁锈。酸浸洗废液中析出的硫酸亚铁晶体，常作为垃圾扔掉。既污染环境又造成资源浪费。通过适当物理、化学方法，进行去杂提纯，可把这些废弃的硫酸亚铁制成饲料级添加剂，提高硫酸亚铁资源利用的附加价值。即具有较高的经济效益，又有良好社会效益。

Production of feedstuff additive with green vitriol from waste acid solution

vitriol is widely used to clean the rust on metal in the preraring workshop of mechanical manufacture. Green vitriol separate out from waste acid solution is always thrown away as rubbish. This will pollute the environment and will waste resource. These crystal can be refined through physical and chemical ways and used as feedstnff additive. And this will make good use of green vitriol and have a good economical effect as well as social effect.