隨著選礦工藝水平的進(jìn)步和選礦廠介耗量等關(guān)鍵技術(shù)經(jīng)濟(jì)指標(biāo)要求的提高，對(duì)除鐵機(jī)的分選效果的要求也在不斷地提高。因此影響濕式除鐵機(jī)分選效果的因素已成為廣泛討論的問(wèn)題。

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.

影響設(shè)備分選效果的因素具體可以從三個(gè)不同的方面來(lái)分析：

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

一、濕式除鐵機(jī)工作間隙的尺寸大小對(duì)磁選效果的影響

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

所謂除鐵機(jī)的工作間隙，就是圓筒與槽體的間距。這個(gè)間距的大小是影響選別精礦質(zhì)量的因素之一。間隙過(guò)小(即筒皮與槽體的距離太近)，礦漿通過(guò)時(shí)，不但不暢通影響處理量，而且由于間距太小，就會(huì)使不論磁性大小的顆粒都會(huì)得到充分機(jī)會(huì)吸到筒皮上。主要是由于礦漿距磁場(chǎng)太近，磁場(chǎng)強(qiáng)度很高造成的。然而對(duì)降低尾礦品位提高回收率是有好處的。如果間距過(guò)大，只能使磁性較強(qiáng)的顆粒選上來(lái)，弱一些的就選不上來(lái)了。雖然精礦品位提高了，但尾礦品位也增加了，降低了回收率。所以調(diào)整好工作間隙是很重要的。工作間隙可以通過(guò)支架角鋼下邊的墊片來(lái)調(diào)整改變間隙大小。

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、濕式除鐵機(jī)轉(zhuǎn)速大小對(duì)磁選效果的影響

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

一般地說(shuō)除鐵機(jī)直徑小的采用高轉(zhuǎn)速，例如φ600mm直徑采用40rpm;直徑大的采用低轉(zhuǎn)速例如φ750mm直徑采用36rpm。除鐵機(jī)轉(zhuǎn)速的大小主要對(duì)處理能力影響較大。轉(zhuǎn)速高處理能力大，轉(zhuǎn)速低處理能力低。對(duì)精礦質(zhì)量有一定的影響。轉(zhuǎn)速高的除鐵機(jī)在運(yùn)轉(zhuǎn)中，由于速度比較快，磁性小些的連生體和脈石上來(lái)的機(jī)會(huì)就少，只有那些磁性較高的礦粒才可能選別上來(lái)，因而精礦質(zhì)量就高些。反之轉(zhuǎn)速低，速度相對(duì)較慢，由于磁感應(yīng)作用使磁性弱些的礦粒也有機(jī)會(huì)選別上來(lái)，造成精礦質(zhì)量受到影響。

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、濕式除鐵機(jī)磁系偏角大小對(duì)磁選效果的影響

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

除鐵機(jī)在靠傳動(dòng)側(cè)的軸頭上都裝有磁偏角指示裝置，搬動(dòng)調(diào)整螺母就可調(diào)節(jié)磁系偏角的大小。磁偏角的角度過(guò)大過(guò)小都不好，過(guò)小影響精礦質(zhì)量，使磁性較小的顆粒有機(jī)會(huì)選別上來(lái)，但會(huì)使尾礦品位降低，對(duì)回收率有好處;角度過(guò)大，對(duì)提高精礦質(zhì)量有好處，因?yàn)橹挥写判源蟮念w粒才有機(jī)會(huì)被選上來(lái)，磁性小的就沒(méi)有機(jī)會(huì)上來(lái)而進(jìn)入尾礦，使尾礦品位增高，降低回收率。所以，磁偏角大小多少合適必須根據(jù)作業(yè)要求來(lái)調(diào)整，一般生產(chǎn)現(xiàn)場(chǎng)磁偏角均調(diào)整在15°～20°左右。調(diào)整好的磁系偏角，在生產(chǎn)中如果操作條件及要求沒(méi)有變化，不要輕易隨便動(dòng)。

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.