XDF型Ф250×200高壓電選機主要用于導體礦物與非導體礦物的分選，也可以代替篩分作業用于多種物料的分級，以及用于糧食加工和部分選種工作中。本產品由原地礦部唯一指定企業生產，執行行業標準。

當物料經旋轉著的鼓筒帶至電暈電極和偏極作用的高壓電場中時，料粒受到各種電力（包括庫侖力、非電場作用力及界面吸力）離心力、重力的作用。由于各種物料電性質的不同，受力狀態的不同使物料落下時的軌跡不同，從而達到分選的目的。

在高壓電場作用下導體和非導體受力的情況表現為：導體物料在電場中吸附電荷后，能很快地傳走，在離心力和重力的作用下沿鼓筒旋轉的方向從前方落下；非導體物料由于其導電性很差，從高壓電場中吸附電荷后不能很快地傳走，從而與鼓筒面產生界面吸力，此界面吸力大于離心力和重力的合力，故物料緊吸于鼓面直至后方，用毛刷強制下；而介于導體與非導體之間的物料則在中間帶落下，即所謂中性物料。

XDF Model Ф250×200 High Voltage Electrostatic Separator is mainly applied for separation of conductor and non-conductor minerals and classification of planting materials instead of screening operation as well as food processing and seed selection. The product is made by the only manufacturer designated by the former Ministry of Geology and Mineral Resources, in compliance with the Industrial standards.

When materials are carried by running drum into high-voltage electric field with actions of corona electrode and polarity, feed particles are subject to actions by various electrical powers (coulomb force,non-field electric force and interface suction ), centrifugal force and gravity. The different properties of materials and the different forced state result in variance of trajectory, thereby achieve the objective of separation.

The performance of conductor and non-conductor force with the action of high-voltage electric fields is expressed as follows: Conductor materials after absorbing electric charge will quickly transferred away and drop from the front toward the direction of rotation of the drum with the centrifugal force and gravity. The non-conductor materials with poor conductivity is unable to be transferred away, causing production of interface suction with the drum , which is greater than the resultant force of centrifugal force and gravity. As a result, the materials are tightly absorbed on the drum surface up to the rear and under the force of brush, the materials between conductors and non-conductors drop in the middle zone, i.e neutral materials.

機械結構概述

Structure

        根據實驗研究工作的特殊需要，分選過程中，很多參數都能夠進行調節和對比。本機能夠滿足實驗研究工作的要求，且操作方便、造美觀。鼓筒的支承采用了懸臂軸式結構，其外部設置一有機玻璃的安全護罩，高壓電源和電氣部分在機器下部，見結構示意圖。

According to the special needs of  experimental research, many parameters can be adjusted and compared during the  separation process. This machine can meet the requirements of experimental  research, is easy to operate, and has attractive appearance. The bearing of the  drum adopts cantilever axis structure. Its outside is installed a safety  protection cover made of organic glass. The high voltage source and electrical  parts are in the lower part of the machine. See the structure diagram for  detailed structure.

全機主要由機架、傳動部分、電器、分選漏斗、鼓筒電極、毛刷、給料器、料倉、安全保護罩等部分組成。

The machine is mainly composed of main,  transmission part, electrical equipment, separation hopper, drum electrode,  hair brush, feeder, stock bin, and safety protection cover.

料倉內裝￠20×150（300W）三根管狀電熱元件，加熱溫度由數顯調節儀自動控制，最高溫度不超過300℃，給料量通過手輪調節其閘門開口大小來控制，在前面有指示閘門開口大小的指針和刻度。

Three tubular ￠20×150（300W）heating elements are installed in the store  bin. The heating temperature is automatically controlled by the digital  regulators. The maximum temperature does not exceed 300℃.  The feeding amount is controlled through the adjustment of the size of the gate  opening.

給料溜槽裝在電磁振動給料器上，通過手輪可以調節溜槽的角度，調節旋鈕可以控制電磁振動給料器的給料速度；為了避免電極高壓影響分選效果，溜槽出料處裝有一塊環氧樹脂膠板。

The feeding chute is installed on the  electromagnetic vibration feeder. The angle of chute can be adjusted through  hand wheel. Adjust the knob and the feeding speed of electromagnetic vibration  feeder can be controlled. To avoid the high voltage electrode from affecting  the separation effects, an epoxy resin gelatine plate is installed in the  material discharging part of the chute.

鼓筒外表鍍硬鉻以提高其使用壽命，鼓筒內裝有3根電熱元件，鼓筒表面溫度由數顯調節儀自動控制，最高溫度不超過80℃；鼓筒的轉速由一臺交流變頻器控制驅動電動機，從而實現鼓筒的無級調速。

The surface of drum is coated with hard  chromium to improve its service life. Three heating elements are installed in  the drum. The temperature on the surface of the drum is automatically  controlled by the digital regulator. The maximum temperature does not exceed 80℃.  The rotating speed of drum is controlled by an AC frequency converter to drive  the motor, so as to realize stepless speed regulation of drum.

電極采用柵狀弧形復合電極，電暈電極為￠0.2毫米的鎳鉻絲張緊于弧形支架上，偏極是外徑￠30毫米的黃銅管，通高壓后產生電暈電場與靜電電場相結合的復合電場，整個電極用錐套固裝于電極架上，為保證方位正確，錐軸上有定位圓柱銷，由手輪調節電極徑向距離，由手輪調節電極的周向入選角，調節時有時遇到粉塵卡緊的情況。可以正反轉動一下手輪，活動后，再進行調節。

The electrode is grid arc combination  electrode. The corona electrode is ￠0.2 mm  nichrome wire which is tensioned on the arc support. Polar is brass pipe whose  external diameter is 30mm.  After connected to high voltage, it produces composite electric field which  combines corona field and electrostatic field. The whole electrode is installed  on the electrode stand with taper sleeve.  To ensure correct direction, there is locating cylindrical pin on the  cone axis. Radial distance of electrode is adjusted through hand wheel and  circumference angle is adjusted through hand wheel. During their adjustment,  sometimes they might be clipped by dust. In such case, turn the hand wheel in  both directions. After they are movable, adjustment can begin to be made.

毛刷用于將吸附在鼓筒表面上的物料在非導體漏斗上方強制刷下，以提高分選效果，毛刷轉速是鼓筒轉速的2倍，為了延長毛刷使用壽命和方便操作，毛刷裝在一可以擺動的外殼上，利用電磁鐵和搖臂在工作時使毛刷緊靠鼓筒，工作結束將電磁鐵斷電，毛刷靠外殼本身重量擺離鼓筒，以減少毛刷的損耗，調節電磁鐵拉桿的長度可以改變毛刷靠近鼓筒時的壓縮量。

Hairy brush is used to remove through  brushing the materials sticking to the surface of the drum from the upper part  of the nonconductive hopper, so as to improve separation effects. The rotating  speed of hairy brush is twice as much as that of the drum. To prolong the  service life of hairy brush and to facilitate its operation, the hairy brush is  installed on a shell that can swing. Get the hairy brush close to the drum  during the operation of electromagnet and rocker arm. After operation is  finished, cut off the power supply to the electromagnet. The hairy brush swings  away from the drum through the weight of the shell to reduce loss of hairy  brush. Adjust the length of the draw bar of the electromagnet and the  compression amount of hairy brush when it is near the drum.

分選漏斗用不銹鋼做成，其上裝有兩塊可以調整的分選板，分選板是絕緣性能良好的環氧樹脂膠板，分選板的位置（角度）用手輪和分別調節。

The separation hopper is made of stainless  steel. Two adjustable separation plates are installed on it. The separation  plates are epoxy resin plywood which enjoys good insulation property. The  position of separation plate is adjusted respectively with hand wheel and .

安全護罩是保證全機高壓安全的主要部分，使用時必須注意其與機架接地的可靠，工作結束要將前門打開以便清掃，前門的開關裝在罩的前上方，開門時先將開關手輪上的插銷拔出，然后逆時針轉動手輪，至放電棒已與電極接觸將高壓電放走之后，門才能打開；工作時必須將門關緊，并順時針轉動手輪，插銷插進鎖緊后才能對高壓送電開始工作，這些都采取了聯鎖裝置，以確保安全，為了便于觀察罩身，前門裝有透明的有機玻璃，在頂部裝有照明燈.

The safety protection cover  is the main part to ensure the high voltage safety of the complete machine. During  its use, attention must be paid to see if it and the frame are reliably  grounded. After operation is finished, the front door shall be opened for the  convenience of cleaning. The switch for the front door is installed on the  upper front of the cover. When opening the door, first pull out the bolt on the  hand wheel of switch and then turn the hand wheel counterclockwise. The door  can only be opened after the discharging rod has contacted the electrode and  high voltage electricity is discharge. During operation, the door must be  fastened. Besides, turn the hand wheel clockwise. Only after the bolt is  inserted and locked can high voltage transmission be begun. These are all  equipped with interlocking devices to ensure safety. To be able to observe the  cover better, the front door is equipped with transparent organic glass. On the  top is installed illuminating light .