黑色结晶粉末（It is a brown crystalloid powder） 铁含量(Ferric Content)：①≥25％；②≥38％； 作用与用途：抗贫血药，主要用于仔猪缺铁性贫血及大牲畜的贫血症。
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In order to maintain the excellent foaming property the content of ferric oxide in the refining slag should be controlled under 1. 0%, and lower than 0. 5% much better.
所以，为使精炼渣系具有良好的发泡性能，渣中氧化亚铁含量应小于1％，最好小于0．5％。
Application of solid ferric-oxide desulfurizers has been limited for a long time because the gas with high sulfur content can't be purified sufficiently under high space velocity.
固体氧化铁脱硫剂长期以来因硫容量低，用于高含硫气体时，存在着在高空速下气体净化度不高的问题，限制了氧化铁脱硫剂的应用。
The methods for measuring the content of ferric oxides are explored.
对测定氧化铁含量的方法进行了研究。
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