摘要:
在轻工业生产、湿法冶金、水处理等行业,铁含量控制是普遍性问题.本文主要介绍了非金属矿物、金属湿法冶金、以及水处理等行业常用的除铁方法.磁选是菲金属矿物和碱性金属湿法冶金首选的除铁方法.但由于非金属矿含铁成分的多样性,以及设备和技术限制,有些产品通过磁选除铁后质量不达标,须结合化学浸出法进一步除铁.酸性湿法冶金除铁主要利用化学沉淀法,以针铁矿法应用最为广泛.氢氧化铁法,多以胶体状态,过滤性能较差.膜分离技术近年来发展迅速,目前以微滤膜(孔径>50 nm)为主,主要应用在生物医药、化工与石化、食品与饮料、特种水处理等领域.地下水除铁,广泛采用锰砂滤料——接触性催化氧化法.无机化工产品进一步提纯到很高纯度,一般通过电化学或物理方法.
Abstract:
The content control of iron is a general problem in light industrial production,hyrometallurgy,water treatment,and so on.This paper mainly introduces the iron content control methods in these applications.Magnetic separation is the preferred iron removal technology for the applications of non-metal ores and alkaline hyrometallurgy.It is often combined with chemical leaching methods due to the diversity of iron components,and the limitations of equipment.Chemical precipitation,mainly by the goethite process,is the main method in the application of acid hyrometallurgy.Iron hydroxide process has a limited application due to the poor filtration result of its colloidal property.Membrane separation technology has been developed rapidly in recent years,mainly used in bio pharmaceutical,chemical and petrochemical,food and beverage,special water treatment and other fields.Manganese san filtration is widely used for iron removal from groundwater.
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