除鐵機，又名磁選機。一般指非金屬精選磁選機，即去除原材料中的鐵質和其他磁性物質，常用于陶瓷、礦業、化工、研磨等行業。例如在礦業中，原料一般先使用大中型的磁選機粗選，粗選后的原料含鐵量降低到一定程度，可以供某些對鐵含量要求不高的行業使用。而目前，國內外使用的磁選機(除鐵機)種類很多，分類方法不一，根據不同特征有以下幾種分類方法。

Iron removal machine, also known as magnetic separator. Generally refers to the non-metallic magnetic separator, that is, the removal of raw materials of iron and other magnetic materials, commonly used in ceramics, mining, chemical, grinding and other industries. For example, in the mining industry, the general use of raw materials in large and medium sized magnetic separator roughing, raw material after the iron content to a certain extent, can be used for some iron content requirements of the industry is not high. At present, there are many kinds of magnetic separators (except iron) used at home and abroad, and the classification methods are different.

一、按磁選機(除鐵機)的磁源可分為永磁磁選機與電磁磁選機。

First, according to the magnetic separator (iron removal machine) can be divided into permanent magnetic separator and magnetic separator.

二、按選別過程的介質可分為干式磁選機與濕式磁選機。

Two, according to the selection of the process can be divided into medium dry magnetic separator and wet magnetic separator.

三、按磁場類型可分為恒定磁場、脈動磁場和交變磁場磁選機。

Three, according to the type of magnetic field can be divided into constant magnetic field, pulsating magnetic field and alternating magnetic field magnetic separator.

四、按機體外形結構分為帶式磁選機、筒式磁選機、輥式磁選機、盤式磁選機、環式磁選機、籠式磁選機和滑輪式磁選機。其中主要以磁場強度、選別介質結構型式來區分。弱磁選機主要用于選別強磁性礦物，如磁鐵礦、鈦磁鐵礦、硅鐵。

Four, according to the body structure is divided into belt magnetic separator, drum magnetic separator, roller type magnetic separator, magnetic separator, magnetic separator, magnetic separator and magnetic separator. Among them, the magnetic field intensity and the selective medium structure. Weak magnetic separator is mainly used for the selection of strong magnetic minerals, such as magnetite, ilmenite, ferrosilicon.

五、根據磁場強弱可分為：

Five, according to the strength of the magnetic field can be divided into:

1.弱磁場磁選機，磁極表面磁場強度H0=72～136千安/米，磁場力HgradH=(2.5～5.0)×1011安/米2;

1 weak magnetic field magnetic separator, the magnetic field strength of the magnetic pole H0=72 ~ 136 thousand /, magnetic field force HgradH= (2.5 ~ 5) * 1011 M / m;

2.中磁場磁選機，磁極表面磁場強度H0=160～480千安/米;

2 magnetic field magnetic separator, magnetic pole surface magnetic field strength H0=160 ~ 480 thousand;

3.強磁場磁選機，磁極表面磁場強度H0—480～1600千安/米，磁場力HgradH=(1.5～6.0)×1013安2/米3。

3 strong magnetic field magnetic separator, magnetic pole surface magnetic field strength H0 - 480 ~ ~ 1 million 600 thousand /, magnetic field force HgradH= (1.5 ~ 6) * 1013 m 2/.

經過多年的發展研制出多種形式的濕式強磁選機來適應企業磁選品位低、嵌布粒度細及礦物組成復雜的弱磁性礦物使用，如環式、籠式、圓盤式。中等磁場磁選機(除鐵機)主要用來分選局部氧化的強磁性礦石。

After years of development, the development of a variety of forms of wet high intensity magnetic separator to adapt to the low grade magnetic separation, fine grain size and mineral composition of the complex of the use of weak magnetic minerals, such as ring, cage, disc type. Medium magnetic separator (iron removal machine) is mainly used to sort local oxidation of strong magnetic ore.