The high-voltage electric separator is suitable for the separation and selection of rare, non-ferrous black, and non-metallic ores. The ore electric separator is also suitable for the separation, purification, and comprehensive recovery of fly ash and other industrial waste materials. This ore electric separator is used for the highest recovery rate of scheelite, cassiterite, zircon, gold red, gold, and silver, and is rated as one of the important mining and beneficiation machinery in China. It has the largest sales volume of similar products.
1、 The working principle of the high-voltage ore separator is mainly to utilize the different conductivity and dielectric constants of various minerals, and to achieve the sorting purpose through corona electric and electrostatic fields. The schematic diagram of the working principle of the high-voltage separator is as follows: when the high-voltage electrode is applied with a certain intensity of high-voltage electricity, a corona electric field is generated between the corona electrode and the drum, while an electrostatic electric field is formed between the biased electrode and the drum. After drying and heating, contemporary mineral processing enters the corona electric field with the drum. The corona current charges the minerals, and conductive mineral particles can quickly transfer the charges they carry to the drum in contact with the drum, which is called discharge. When the minerals rotate away from the corona electric field and enter the electrostatic field with the drum, the positive charges on the surface of the drum promote the conductive minerals to be positively charged. Therefore, conductive minerals detach from the drum and fall into the conductive product section in front of the drum under the action of electricity, gravity, and centrifugal force. Non conductive minerals, due to their slow discharge, still retain negative charges on their surface. These charges generate electrostatic attraction in the electrostatic field that is greater than the mineral's gravity and centrifugal force, causing the mineral to continue to adsorb on the surface of the drum until it is brushed down by a brush behind the drum. This achieves the goal of sorting minerals according to their conductivity at different times. In addition, the bias of the high-voltage electric separator towards the electrode not only accelerates the discharge of conductive minerals, but also pulls non conductive minerals towards their own side, increasing the degree of deviation of conductive minerals from the drum, which helps to strengthen the sorting process.
2、 High voltage ore separator equipment structure: The main machine of the high voltage ore separator consists of seven parts: ore hopper, feeding, drum, electrode, brush, ore discharge, and transmission: 1. The ore hopper of the high voltage ore separator is used for ore storage and heating, and is equipped with a permanent red external temperature, and the heating system is automatically controlled to ensure that the sorted materials have a uniform temperature. 2. The feeding device of the high-voltage ore electric separator is composed of a feeding regulator, a feeding plate, and a blocking plate, and the feeding amount is controlled by adjusting the handwheel. When cutting, it is necessary to adjust slowly and ensure that the material evenly falls on the drum. The function of the ore blocking plate is to prevent the material from directly falling into the conductor ore hopper. 3. The two drums of the high-voltage electric separator have a diameter of 220-320mm (outer diameter) and a length of 1500mm. The drum serves as a grounding positive electrode and is an important component for sorting. The electric heater of the drum drum is fixed on the support shaft to rotate, while it is fixed on the non rotating support shaft, which is different from any electric separator at home and abroad. Therefore, the heating efficiency of the drum drum is high, absolutely safe and reliable, and the drum temperature is automatically controlled. 4. The electrode structure of this high-voltage ore separator adopts composite electrodes, also known as composite electric fields, which can form two sets of electrode structures suitable for separating coarse and fine electrodes. The corona electrode adopts nickel chromium resistance wire with X=0.32mm and relatively high strength. Fix it on the bracket with screws, and the electrostatic pole is also fixed on the bracket with screws. The distance between the corona pole and the corona pole, as well as the distance between the electrostatic pole and the corona pole, can be adjusted. The electrostatic pole is made of stainless steel tube, with an X=30-35mm angle a and an adjustable diagonal angle a between the electrostatic pole and the center line of the drum. The distance between the electrode and the drum can be adjusted, as there are differences in selecting different mining distances, angles, and voltages. 5. Due to the mirror surface being sucked onto the drum surface, non-conductive minerals with a brush must be brushed into the non-conductive ore hopper, so a threaded brush is installed behind the drum. The outer diameter of the brush X=140mm, which is 1.25 times the rotational speed. (Nowadays, new materials such as wool felt are used as ore brushes.) 6. The equipment and ore discharge are self flowing, with conductor ore discharged from the front of the machine and tailings (non conductor ore) discharged from the rear. The partition board is a regulating device for regulating the grade and yield of conductors and non-conductors, both made of insulated plastic sheets to prevent induced electrification. The speed of the 7 transmission electric separator and drum is closely related to the separation of various minerals, requiring smooth rotation and stepless speed regulation. This high-voltage ore separator uses an AC speed regulating motor with a power range of 1.1-4kw as the power source.
3、 The electrical part of the high-voltage electric separator: 1. The high-voltage DC power supply adopts 220V single-phase AC input, boosting, rectification, and positive electrode grounding. The negative electricity is output from the high-voltage cable to the electrode of the high-voltage electric separator. The entire working process is recognized by the overcurrent self protection circuit. The high-voltage transformer and silicon pile are all installed in the oil tank of the transformer, and the operation box and control console are combined as a whole. The quality and output of mineral processing are closely related to the quality of the DC power supply. 2. The drum speed regulation part is completely used to adjust the drum speed. It is installed in the electrical operation console and can be adjusted by adjusting the voltage to adjust the drum speed. Generally, the drum speed is controlled between 40-140 rpm, which depends on the processing granularity and operation. Generally, coarse particles use a lower speed, while fine particles use a higher speed.
4、 Operating Regulations for High Voltage Electric Separation Machine 1. Before sorting, the entire ore hopper should be filled with ore sand and heated to 150-250 ℃ (about half an hour). It can take less than half an hour in summer and more than half an hour in winter. Under normal circumstances, the mineral passes from the bottom through the sorting room to the ore discharge hopper, and the hand feels warm and suitable. 2. Before the high-pressure ore electric separator is sorted, the drum temperature should be raised to 50-60 ℃. After formal sorting, as the material has been pre heated to a certain temperature, half an hour later, the heating power inside the drum can be cut off. At this time, the temperature is transmitted to the drum through the hot material to meet the requirements. 3. When starting the high-voltage power supply of the high-voltage ore separator, it should first gradually rise from zero to the required high voltage, and cannot be immediately adjusted to high voltage to prevent damage to the silicon pile. 4. When the high-voltage ore electric separator officially selects minerals, it is not allowed to open the sorting room door and avoid touching high voltage. When stopping or adjusting maintenance, the equipped high-voltage discharge rod must be in contact with the high-voltage electrode for 2-3 seconds, and residual electricity on the electrode must be discharged before operation.
The high-voltage electric separator is suitable for the separation and selection of rare, non-ferrous black, and non-metallic ores. The ore electric separator is also suitable for the separation, puri