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漿料除鐵機分選效果受什么影響

作者:管理員     發布于:2017-03-31    

隨著選礦工藝水平的進步和選礦廠介耗量等關鍵技術經濟指標要求的提高,對除鐵機的分選效果的要求也在不斷地提高。因此影響濕式除鐵機分選效果的因素已成為廣泛討論的問題。

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.

影響設備分選效果的因素具體可以從三個不同的方面來分析:

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

一、濕式除鐵機工作間隙的尺寸大小對磁選效果的影響

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

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

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、濕式除鐵機轉速大小對磁選效果的影響

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

一般地說除鐵機直徑小的采用高轉速,例如φ600mm直徑采用40rpm;直徑大的采用低轉速例如φ750mm直徑采用36rpm。除鐵機轉速的大小主要對處理能力影響較大。轉速高處理能力大,轉速低處理能力低。對精礦質量有一定的影響。轉速高的除鐵機在運轉中,由于速度比較快,磁性小些的連生體和脈石上來的機會就少,只有那些磁性較高的礦粒才可能選別上來,因而精礦質量就高些。反之轉速低,速度相對較慢,由于磁感應作用使磁性弱些的礦粒也有機會選別上來,造成精礦質量受到影響。

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、濕式除鐵機磁系偏角大小對磁選效果的影響

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

除鐵機在靠傳動側的軸頭上都裝有磁偏角指示裝置,搬動調整螺母就可調節磁系偏角的大小。磁偏角的角度過大過小都不好,過小影響精礦質量,使磁性較小的顆粒有機會選別上來,但會使尾礦品位降低,對回收率有好處;角度過大,對提高精礦質量有好處,因為只有磁性大的顆粒才有機會被選上來,磁性小的就沒有機會上來而進入尾礦,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作業要求來調整,一般生產現場磁偏角均調整在15°~20°左右。調整好的磁系偏角,在生產中如果操作條件及要求沒有變化,不要輕易隨便動。

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.


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