A discussion on the technology of removing iron from feldspar powder

Feldspar minerals are often due to iron and greatly reduced the quality of feldspar, affecting the price of feldspar. Reduce the iron content of feldspar, improve the quality of feldspar, increase economic efficiency is the first issue in the face of feldspar mining, processing enterprises.

特别是近几年来，早期优质的低铁长石矿产资源已几乎被开采殆尽，再加上现需用长石企业对长石品质的要求越来越高，利用现有铁含量偏高的长石资源来制备低铁长石以价值凸显，势在必行。

Especially in recent years, early high quality low iron feldspar resources were almost depleted, plus the need of enterprise quality feldspar feldspar have become increasingly demanding, the preparation of low iron feldspar to highlight the value of using the existing high iron content of feldspar resources, it is imperative to.

特别是值得一提的是有些长石矿源铁含量偏高而品质大大折扣。 想搞好长石除铁有以下几个问题必须弄清楚： 1. 长石中铁的赋存形式： 铁在长石中常常以磁铁矿、赤铁矿、黑云母、白云母、绿泥石、钛铁矿等形式存在，以上几中存在形式都具有磁性特征，完全可以通过磁选这种低成本的办法来降低铁含量。当然，铁也会以无磁性特征的形式存在于矿石中，例如黄铁矿、菱铁矿。 2. 磁性颗粒与矿石的解离粒度。如果200目(筛上)以粗，干法除铁会取得不错的效果，辊式干式强磁选机的选择很重要，既要场强高，还要梯度高，各家磁选机的磁选效果差异很大，某公司引进的德国技术的辊式干式强磁选机比国内的设备进行长石粉除铁、长石粉降铁效果显著的多；－200目粉体的话最好采用湿法工艺除铁，不仅污染小，而且效果好，其效果主要取决于场强和梯度，国内设备外观相似，但是技术水平参差不起，选矿效果差别很大。

In particular, it is worth mentioning that some feldspar ore source of high iron content and the quality of a large discount. Want to do a good job in addition to iron feldspar have the following questions must be clear: the occurrence of 1 feldspar iron: iron in feldspar often magnetite, hematite, biotite, muscovite, chlorite, ilmenite and other forms exist, the above existence form has magnetic properties, completely can reduce the content of iron by magnetic separation this low cost way.

Of course, the iron will also be in the form of non - magnetic characteristics in the ore, such as pyrite, iron ore. 2 the particle size of magnetic particles and ore. If (200 mesh sieve) with coarse, dry iron will achieve good results, roller dry magnetic separator is very important, both to high field strength, but also the high gradient magnetic separator, magnetic separation effect of the difference is very big, and dry type strong magnetic separator of a German company to introduce the technology of feldspar powder in addition, the effect of iron reduction of iron feldspar powder significantly more than the domestic equipment; 200 mesh powder is best by wet process in addition to iron, not only pollution is small, but the effect is good, the effect mainly depends on the intensity and gradient, the domestic equipment of similar appearance, but the technical level is different, the effect of different concentration.