浆料除铁机分选效果受什么影响

随着选矿工艺水平的进步和选矿厂介耗量等关键技术经济指标要求的提高，对除铁机的分选效果的要求也在不断地提高。因此影响湿式除铁机分选效果的因素已成为广泛讨论的问题。

With the progress of the mineral processing technology and the improvement of the key technical and economic indexes of the ore dressing plant, the requirement of the separation effect of the iron removal machine is also increasing. Therefore, the factors that affect the separation efficiency of wet iron removal machine have been widely discussed.

影响设备分选效果的因素具体可以从三个不同的方面来分析：

The factors that affect the effect of equipment separation can be analyzed from three different aspects:

一、湿式除铁机工作间隙的尺寸大小对磁选效果的影响

First, the size of the size of the working gap of wet iron removal machine on the magnetic separation effect

所谓除铁机的工作间隙，就是圆筒与槽体的间距。这个间距的大小是影响选别精矿质量的因素之一。间隙过小(即筒皮与槽体的距离太近)，矿浆通过时，不但不畅通影响处理量，而且由于间距太小，就会使不论磁性大小的颗粒都会得到充分机会吸到筒皮上。主要是由于矿浆距磁场太近，磁场强度很高造成的。然而对降低尾矿品位提高回收率是有好处的。如果间距过大，只能使磁性较强的颗粒选上来，弱一些的就选不上来了。虽然精矿品位提高了，但尾矿品位也增加了，降低了回收率。所以调整好工作间隙是很重要的。工作间隙可以通过支架角钢下边的垫片来调整改变间隙大小。

The so-called iron removal machine is the gap between the cylinder and the slot. The size of the spacing is one of the factors affecting the quality of the concentrate. The gap is too small (i.e. the drum skin and the body too close), pulp through, not only smooth the impact of processing capacity, but also because the distance is too small, it will make no magnetic size particles will be sucked into the cylinder skin full opportunity. The reason is that the pulp is too close to the magnetic field and the magnetic field intensity is very high. However, it is beneficial to reduce the tailings grade and improve the recovery rate. If the spacing is too large, only the magnetic particles can be selected up, some of the weak on the election can not come up. Although the grade of concentrate is increased, the grade of tailings is increased and the recovery rate is reduced. So it is important to adjust the working space. The working clearance can be adjusted by changing the size of the spacer under the support angle.

二、湿式除铁机转速大小对磁选效果的影响

Two, the effect of the speed of the wet iron removal machine on the magnetic separation effect

一般地说除铁机直径小的采用高转速，例如φ600mm直径采用40rpm;直径大的采用低转速例如φ750mm直径采用36rpm。除铁机转速的大小主要对处理能力影响较大。转速高处理能力大，转速低处理能力低。对精矿质量有一定的影响。转速高的除铁机在运转中，由于速度比较快，磁性小些的连生体和脉石上来的机会就少，只有那些磁性较高的矿粒才可能选别上来，因而精矿质量就高些。反之转速低，速度相对较慢，由于磁感应作用使磁性弱些的矿粒也有机会选别上来，造成精矿质量受到影响。

Generally speaking, in addition to the small diameter of the iron machine with high speed, such as the diameter of the 600mm 40rpm; diameter of the low speed such as the diameter of 750mm 36rpm. The speed of the iron removal machine has a great influence on the processing capacity. High processing speed, low speed and low processing power. Have certain influence on the quality of concentrate. The high speed of the iron removing machine in operation, due to the faster, smaller magnetic coenobium and gangue up far less opportunity, only those particles may be higher magnetic separation, so concentrate on higher quality. On the contrary, the speed is low, the speed is relatively slow, due to the role of magnetic induction of the magnetic weak ore particles also have the opportunity to pick up, resulting in the quality of concentrate affected.

三、湿式除铁机磁系偏角大小对磁选效果的影响

Three, the influence of the magnetic declination of the wet iron removal machine on the magnetic separation effect

除铁机在靠传动侧的轴头上都装有磁偏角指示装置，搬动调整螺母就可调节磁系偏角的大小。磁偏角的角度过大过小都不好，过小影响精矿质量，使磁性较小的颗粒有机会选别上来，但会使尾矿品位降低，对回收率有好处;角度过大，对提高精矿质量有好处，因为只有磁性大的颗粒才有机会被选上来，磁性小的就没有机会上来而进入尾矿，使尾矿品位增高，降低回收率。所以，磁偏角大小多少合适必须根据作业要求来调整，一般生产现场磁偏角均调整在15°～20°左右。调整好的磁系偏角，在生产中如果操作条件及要求没有变化，不要轻易随便动。

In addition to head on the drive side of the iron machine is equipped with magnetic declination indicating device, moving the adjusting nut can adjust the angle of magnetic system. The declination angle is too large or too small are not good, too small to affect the magnetic concentrate quality, smaller particles have a chance to choose don't come up, but will reduce the grade of tailings, is good for recovery; angle is too large, is good for improving the quality of concentrate, because only the magnetic particles have a chance of being elected. There is no chance of a small magnetic up into the tailings, the tailings grade increased, reduce the recovery rate. So, how much the right size declination according to the requirement of work must be adjusted, the general production site were adjusted in 15 degrees declination to 20 degrees. Adjust the magnetic declination, in the production if the operating conditions and requirements have not changed, do not easily move.