CN1613563A - Composite flashing magnetic field concentration upgrading apparatus - Google Patents
Composite flashing magnetic field concentration upgrading apparatus Download PDFInfo
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- CN1613563A CN1613563A CN 200310103252 CN200310103252A CN1613563A CN 1613563 A CN1613563 A CN 1613563A CN 200310103252 CN200310103252 CN 200310103252 CN 200310103252 A CN200310103252 A CN 200310103252A CN 1613563 A CN1613563 A CN 1613563A
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- 239000002131 composite material Substances 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 24
- 239000011707 mineral Substances 0.000 claims abstract description 24
- 238000005054 agglomeration Methods 0.000 claims abstract description 19
- 230000002776 aggregation Effects 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 10
- 239000012535 impurity Substances 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 7
- 230000018044 dehydration Effects 0.000 abstract description 5
- 238000006297 dehydration reaction Methods 0.000 abstract description 5
- 238000007885 magnetic separation Methods 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 230000008859 change Effects 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000005188 flotation Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 5
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 229910001608 iron mineral Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 239000006249 magnetic particle Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Abstract
本发明公开了一种湿式精选设备。该设备利用磁团聚重选机和磁力脱水槽两种设备的选矿原理，设计了永磁和电磁相结合的复合闪烁磁场并附以自动控制设施，能有效地把磁选精矿中夹杂的连生体和脉石等杂质清除，从而大幅度提高精矿品位。该设备上面圆筒部分相当于磁团聚重选机，但磁场特性和矿物受力情况与之大不相同，使磁性矿物在团聚—分散—团聚过程中始终受到向下的磁力并获得较强烈的清洗、选分作用；下面的圆筒与锥体部分相当于磁力脱水槽，起进一步精选作用。该设备本身用压力传感器、流量表自动检测选别区浓度和给水量，通过自动控制系统、电磁阀、排矿阀等自动调整磁场强度、排矿速度及给水量，使设备处于最佳工作状态，不用人工操作调整。
The invention discloses a wet type concentrating equipment. This equipment utilizes the beneficiation principle of magnetic agglomeration re-separator and magnetic dehydration tank, designs a composite scintillation magnetic field combining permanent magnet and electromagnetic, and attaches automatic control facilities, which can effectively remove the continuous impurities in the magnetic separation concentrate. Impurities such as living body and gangue are removed, thereby greatly improving the grade of concentrate. The upper cylinder part of the equipment is equivalent to a magnetic agglomeration re-separator, but the magnetic field characteristics and the force of the minerals are quite different from it, so that the magnetic minerals are always subject to a downward magnetic force during the process of agglomeration-dispersion-agglomeration and obtain a stronger magnetic force. Cleaning and sorting functions; the cylinder and cone below are equivalent to magnetic dehydration tanks, which play a further role in sorting. The equipment itself uses pressure sensors and flow meters to automatically detect the concentration and water supply in the separation area, and automatically adjusts the magnetic field strength, ore discharge speed and water supply through the automatic control system, solenoid valves, ore discharge valves, etc., so that the equipment is in the best working condition. , without manual adjustment.
Description
技术领域technical field
本发明涉及磁铁矿物加工技术，尤其是涉及一种进行磁铁矿物精选的技术装备。The invention relates to magnetite mineral processing technology, in particular to a technical equipment for magnetite mineral beneficiation.
背景技术Background technique
铁精矿质量的高低直接关系着高炉冶炼的成本，国内外选矿界把提高精矿品位作为科研攻关的重点。普通的磁选设备选出的铁精矿中不可避免地混杂一些铁矿物与脉石矿物的连生体及少量单体脉石，如何将这部分连生体和脉石抛出，一直是困扰各选厂提高铁精矿品位的难题。“反浮选”虽然有效，但工艺复杂，生产成本太高；磁团聚重选机只能脱出细粒级连生体及脉石，无法将较粗粒级杂质脱出，且耗水量大，操作难度大。The quality of iron concentrate is directly related to the cost of blast furnace smelting, and domestic and foreign mineral processing circles regard improving the grade of concentrate as the focus of scientific research. The iron concentrate selected by ordinary magnetic separation equipment is inevitably mixed with some joints of iron minerals and gangue minerals and a small amount of single gangue. How to throw out this part of joints and gangues has always been a problem for various The concentrator is faced with the problem of improving the grade of iron ore concentrate. Although "reverse flotation" is effective, the process is complicated and the production cost is too high; the magnetic agglomeration re-separator can only remove fine-grained conjoints and gangues, but cannot remove coarser-grained impurities, and it consumes a lot of water and is difficult to operate big.
“反浮选”工艺是在细磨的基础上，对磁选精矿增加反浮选作业，剔除精矿中的贫连生体。该工艺不仅工艺复杂，对粒度和矿浆温度要求标准较高，需建设反浮选厂房，而且对铁矿物粒度有较严格的要求，增加了药剂、动力等消耗，提高了选矿比，降低了生产效率，增加了金属流失，导致生产成本升高，并因使用药剂可能造成环境的影响。The "reverse flotation" process is based on fine grinding, adding reverse flotation operation to the magnetic separation concentrate to remove the poor conjoint organisms in the concentrate. This process is not only complicated, but also requires a high standard for particle size and slurry temperature. It needs to build a reverse flotation plant, and has strict requirements for the particle size of iron minerals, which increases the consumption of chemicals and power, increases the beneficiation ratio, and reduces Production efficiency increases metal loss, leading to increased production costs, and possible environmental impacts due to the use of chemicals.
磁团聚重选机是1985年由地质矿产部矿产综合利用研究所和首都钢铁公司等三个单位合作设计的专利产品(专利号85 1 03457.8)，是靠适当的控制和强化磁性矿物的磁团聚作用来实现的，在磁团聚重选机中，由永磁磁系构成了一个磁场强度分布比较均匀的弱磁场，各点的磁场强度是恒定的，磁场力只起磁团聚作用，分选主要取决于重力和上升矿浆流的浮举力大小的对比。该设备没有向下的磁力，上升水流不能过快，粗粒杂质脱不掉；又由于各磁环由永磁铁构成，磁场始终存在，磁性矿物在矿浆中仅靠较弱的磁场力和重力形成的“团聚—分散—团聚”现象不明显，夹杂的杂质不易脱掉，尤其是在矿石中贫连生体含量较高时，选别效果更不理想；另外，该设备体积庞大，水消耗很大，使得流程中水量的负担增大，增加了泵及磁选机的负担；技术操作调整复杂，需要比较有经验的岗位操作工才能调整好，否则就会造成选矿指标的波动。The magnetic agglomeration re-separator is a patented product (patent number 85 1 03457.8) jointly designed by the Institute of Comprehensive Utilization of Mineral Resources of the Ministry of Geology and Mineral Resources and the Capital Iron and Steel Company in 1985. It relies on proper control and strengthening of the magnetic agglomeration of magnetic minerals In the magnetic agglomeration re-separator, a weak magnetic field with a relatively uniform distribution of magnetic field strength is formed by the permanent magnet system. The magnetic field strength at each point is constant, and the magnetic field force only plays the role of magnetic agglomeration. Depends on the contrast between gravity and the buoyancy of the ascending slurry flow. The equipment has no downward magnetic force, the rising water flow cannot be too fast, and the coarse impurities cannot be removed; and because each magnetic ring is composed of permanent magnets, the magnetic field always exists, and the magnetic minerals in the slurry are only formed by weak magnetic force and gravity. The phenomenon of "agglomeration-dispersion-agglomeration" is not obvious, and the mixed impurities are not easy to remove, especially when the content of poor conjoint organisms in the ore is high, the separation effect is even less ideal; in addition, the equipment is bulky and consumes a lot of water. , which increases the burden of water in the process and increases the burden of pumps and magnetic separators; the adjustment of technical operations is complicated and requires experienced operators to adjust well, otherwise it will cause fluctuations in mineral processing indicators.
发明内容Contents of the invention
本发明的目的是为了对磁铁矿物进行选别，尤其是进行精选，针对“反浮选”工艺和磁团聚重选机存在的缺陷和不足，提出了一种靠磁力、重力和水力联合作用的湿式精选设备复合闪烁磁场精选机。The purpose of the present invention is to classify magnetite minerals, especially to select, aiming at the defects and deficiencies in the "reverse flotation" process and magnetic agglomeration re-separator, a combination of magnetic force, gravity and hydraulic force is proposed. The wet sorting equipment composite scintillation magnetic field sorting machine.
本发明包括筒体、给矿器、溢流槽、给水器、排矿阀，其特征在于：在筒体内壁自上而下按一定间隔设置有沉没在矿浆中的多组电磁线圈，在给水器下部设置有永磁体沿圆周均匀分布，同极面指向圆心，最上部的电磁线圈连续供电，并且通过电流控制电磁强度，以保持溢流液面稳定；下部电磁线圈自上而下依次间歇、间隔供电，产生闪烁磁场，强化磁性矿物在矿浆中产生团聚—分散—团聚作用；通过流量计检测给水量信号，用压力传感器检测分选区浓度信号，由控制系统控制电磁阀和排矿阀和电磁线圈的电流强度，以保持给水量符合设定值以及溢流液面稳定。The invention includes cylinder body, ore feeder, overflow tank, water feeder, and ore discharge valve, and is characterized in that multiple groups of electromagnetic coils submerged in the ore slurry are arranged at certain intervals from top to bottom on the inner wall of the cylinder, The lower part of the device is equipped with permanent magnets that are evenly distributed along the circumference, and the same poles point to the center of the circle. The uppermost electromagnetic coil is continuously powered, and the electromagnetic strength is controlled by current to keep the overflow liquid level stable; the lower electromagnetic coil is sequentially intermittent from top to bottom. Power supply at intervals, generate scintillation magnetic field, strengthen magnetic minerals to produce agglomeration-dispersion-agglomeration in the pulp; the water supply signal is detected by the flow meter, the concentration signal of the separation area is detected by the pressure sensor, and the solenoid valve and the ore discharge valve and the solenoid valve are controlled by the control system The current intensity of the coil is used to keep the water supply in line with the set value and the overflow liquid level is stable.
电磁线圈通过防水、耐磨处理，电缆穿线管经过密封处理，直接放置在矿浆中工作。电磁线圈上部数组电磁线圈为大线圈，下部数组电磁线圈为小线圈。永磁体用铜螺栓固定在沿圆周内壁环状不锈钢带上。The electromagnetic coil is waterproof and wear-resistant, and the cable threading tube is sealed and placed directly in the slurry to work. The electromagnetic coils in the upper array of electromagnetic coils are large coils, and the electromagnetic coils in the lower array are small coils. The permanent magnet is fixed on the ring-shaped stainless steel belt along the inner wall of the circumference with copper bolts.
本发明的优点是集中了磁团聚重选机和永磁磁力脱水槽的选别特点，设计了特殊的磁场特性，设备本身能自动控制，不但能有效地将铁精矿中的细粒杂质抛出，而且也能有效地将较粗粒级的连生体和脉石矿物抛出，达到大幅度提高精矿品位的目的。工业试验证明，其提高精矿品位的幅度比磁团聚重选机高2～3倍。The advantage of the present invention is that it integrates the separation characteristics of the magnetic agglomeration re-separator and the permanent magnetic dehydration tank, designs special magnetic field characteristics, and the equipment itself can be automatically controlled, which can not only effectively throw away the fine impurities in the iron concentrate It can also effectively throw out the coarser-grained joints and gangue minerals to achieve the purpose of greatly improving the concentrate grade. Industrial tests have proved that the range of improving the concentrate grade is 2 to 3 times higher than that of the magnetic agglomeration re-separator.
附图说明Description of drawings
图1为本发明所涉及的复合闪烁磁场精选机结构示意图；Fig. 1 is the structure schematic diagram of composite scintillation magnetic field selection machine involved in the present invention;
图2为图1中A-A剖面图。Fig. 2 is a sectional view of A-A in Fig. 1 .
如图所示：1.给矿器，2.压力传感器，3.溢流槽，4.筒体，5.电缆穿线管，6.线圈支架，7.大电磁线圈，8.小电磁线圈，9.给水器，10.永磁体，11.电动执行器，12.电磁阀，13.流量计，14.排矿阀。As shown in the figure: 1. Feeder, 2. Pressure sensor, 3. Overflow tank, 4. Cylinder, 5. Cable threading pipe, 6. Coil bracket, 7. Large electromagnetic coil, 8. Small electromagnetic coil, 9. Water feeder, 10. Permanent magnet, 11. Electric actuator, 12. Solenoid valve, 13. Flow meter, 14. Mine discharge valve.
具体实施方式Detailed ways
本发明复合闪烁磁场精选机的结构及位置关系为：溢流槽3安装在筒体4上部，溢流堰处安装压力传感器2，给矿器1支撑在溢流槽3上，给矿管沿切线方向给入，上部设置有排气管，下部给矿管深入到筒体4内部由中部水平给矿，给矿管下部设有返矿盘。给水器9设置在筒体4下部锥体上方，给水管路上安装流量计13和电磁阀12，给水器9各给水水管均沿切线方向把水给入筒体4，在圆筒中心向下设置一个给水管，并有返水盘。在筒体下部，安装排矿阀14，用电动执行器11来控制排矿阀14的开启程度，最终控制精矿排矿量。The structure and positional relationship of the compound scintillation magnetic field concentrator of the present invention are as follows: the overflow tank 3 is installed on the upper part of the cylinder body 4, the pressure sensor 2 is installed at the overflow weir, the ore feeding device 1 is supported on the overflow tank 3, and the ore feeding pipe Feeding along the tangential direction, the upper part is provided with an exhaust pipe, the lower part of the ore feeding pipe penetrates into the interior of the cylinder 4 and feeds ore horizontally from the middle part, and the lower part of the ore feeding pipe is provided with a return ore tray. The
该精选机内部设置有电磁永磁复合磁系，其中给水器9下部固定有永磁体10沿圆周均匀分布，用铜螺栓固定在沿圆周内壁环状不锈钢带上，同极面指向圆心，在筒体内壁自上而下按一定间隔设置有沉没在矿浆中的多组电磁线圈7、8，线圈放在用不锈钢做成的易于拆卸的线圈支架6上，最上部的电磁线圈连续供电，并且通过电流控制电磁强度，以保持溢流液面稳定。下部几组电磁线圈自上而下依次间歇、间隔供电，产生闪烁磁场。该发明复合闪烁磁场精选机附以自动控制系统，其中：通过流量计13检测给水量信号，用压力传感器2检测分选区浓度信号，由控制系统控制电磁阀12、排矿阀14和电磁线圈7、8的电流强度，以保持给水量符合设定值以及溢流液面状态稳定。The concentrating machine is equipped with an electromagnetic permanent magnet composite magnetic system, wherein the lower part of the
本发明复合闪烁磁场精选机的作业原理为：复合闪烁磁场精选机利用励磁线圈产生电磁场，改善了细粒级磁铁矿颗粒的分选条件，提高分选效果。矿浆由给矿器给入到筒体内，磁性铁矿物在由电磁线圈产生的闪烁磁场中磁化形成磁团聚体，加大了自身重量加上磁力作用，克服了由给水器给入的上升水流的浮举作用向下沉降。沉降过程中，呈不断团聚—松散—团聚状态，以便将团聚体中夹杂的脉石矿物和磁性较弱的连生体用水冲出，使精矿不断得到提纯，当精矿沉降到给水器下方时，又受到由永磁磁系和锥体部分构成的高深磁力脱水槽的作用，进一步精选，形成最终精矿从底部排矿阀中排出。脉石矿物和连生体克服不了上升水流作用，随上升水向上运动，最后形成溢流从溢流槽中排出。向上运动过程中，又不断受闪烁磁场作用，将已单体解离的铁精矿团聚下沉。The operating principle of the composite scintillation magnetic field concentrator of the present invention is as follows: the composite scintillation magnetic field concentrator uses an excitation coil to generate an electromagnetic field, which improves the separation conditions of fine-grained magnetite particles and improves the separation effect. The ore slurry is fed into the cylinder by the ore feeder, and the magnetic iron minerals are magnetized in the flashing magnetic field generated by the electromagnetic coil to form magnetic aggregates, which increase their own weight and the magnetic force, and overcome the rising water flow fed by the water feeder The buoyancy and lifting effect sinks downward. During the settling process, it is in a state of continuous agglomeration-looseness-agglomeration, so that the gangue minerals and weakly magnetic joints in the agglomerates can be washed out with water, so that the concentrate can be continuously purified. When the concentrate settles below the water feeder , and is subjected to the action of the high-deep magnetic dehydration tank composed of permanent magnetic system and cone part, further refined, and the final concentrate is discharged from the bottom discharge valve. The gangue minerals and associated organisms cannot overcome the effect of the rising water, and move upward with the rising water, and finally form an overflow to be discharged from the overflow tank. During the upward movement, it is continuously affected by the flickering magnetic field, and the dissociated iron ore concentrates are aggregated and sink.
当给矿量和给水量发生变化时，自圆筒内给矿点到溢流堰之间(称选分区)浓度则随之变化，压力传感器将浓度变化信号传给自动控制装置，由自动控制装置控制电磁线圈的电流强度，使磁场强度也随之变化，从而改变磁性矿物下沉速度，同时也控制下边排矿阀的开启程度，改变排矿速度，又由自动控制系统检测流量计信号大小，控制电磁阀调整给水量，从而保持选分区浓度趋于设定值，维持最佳选别状态。当矿石性质发生变化，精矿质量波动时，则调整电流设定值，使磁场强度适应矿石变化，保证最终精矿质量，实现对磁性矿物的精选。When the ore supply and water supply change, the concentration between the ore supply point in the cylinder and the overflow weir (called the selection zone) will change accordingly, and the pressure sensor will send the concentration change signal to the automatic control device, which is automatically controlled The device controls the current intensity of the electromagnetic coil, so that the magnetic field intensity also changes accordingly, thereby changing the sinking speed of the magnetic minerals, and at the same time controlling the opening degree of the lower ore discharge valve to change the ore discharge speed, and the automatic control system detects the signal size of the flowmeter , Control the solenoid valve to adjust the water supply, so as to keep the concentration of the selection area tending to the set value and maintain the best selection state. When the properties of the ore change and the quality of the concentrate fluctuates, the current setting value is adjusted to make the magnetic field strength adapt to the change of the ore, so as to ensure the quality of the final concentrate and realize the selection of magnetic minerals.
本发明复合闪烁磁场精选机的特点为：The characteristics of the compound scintillation magnetic field selection machine of the present invention are:
该发明复合闪烁磁场精选机通过充分利用电磁线圈产生的电磁磁场来提高单机台的处理能力。考虑给矿方式和处理矿浆量等多种因素的影响，将七组电磁线圈进行了绝缘防水、耐磨处理，电缆在电缆穿线管处进行密封处理，使电磁线圈直接放置在矿浆中工作，处理能力大幅度提高，既达到了减少配置安装、减少开动台数的目的，节省了投资额度以及作业消耗，又简化了设备结构，便于维修。The compound scintillation magnetic field concentrator of the invention improves the processing capacity of a single machine by making full use of the electromagnetic field generated by the electromagnetic coil. Considering the influence of various factors such as the feeding method and the amount of ore pulp to be processed, the seven sets of electromagnetic coils are insulated, waterproof, and wear-resistant. The ability has been greatly improved, which not only achieves the purpose of reducing configuration and installation, reducing the number of operating units, saving investment and operating consumption, but also simplifying the equipment structure and facilitating maintenance.
该发明复合闪烁磁场精选机把磁团聚重选机的圆筒部分(选别区)组合在顶部磁系的永磁磁力脱水槽上，且将磁团聚重选机的磁系由永磁改为电磁。磁系放在圆筒内部，最下面一个磁系为永磁磁系，是由永磁块沿圆周均布构成，用铜螺栓固定在沿圆周内壁环状不锈钢带上，同极面指向圆心。其余磁系均由电磁线圈构成，这样就形成了一个由电磁线圈和永磁块构成的复合磁系。其中电磁线圈共7个，上部4组电磁线圈为大线圈，下部3组电磁线圈为小线圈，间隔200～250mm。上面4个线圈匝数较多，间距较小，以产生较高磁场强度(因该区上升水流速度大)；下面3个线圈匝数较小，间距较大。顶部一个线圈连续供电，目的是保溢流面稳定，不“翻黑跑矿”。其它线圈按一定时间顺序依次间歇、间隔供电，以产生闪烁磁场，使磁性矿物在矿浆中产生充分的团聚—分散—团聚作用。供电的电流强度、供电时间、间歇时间和间隔线圈个数均可调。The compound scintillation magnetic field concentrator of this invention combines the cylindrical part (selection area) of the magnetic agglomeration re-separator on the permanent magnetic dehydration tank of the top magnetic system, and changes the magnetic system of the magnetic agglomeration re-separator from permanent magnet to for electromagnetic. The magnetic system is placed inside the cylinder, and the bottom magnetic system is a permanent magnet system, which is composed of permanent magnet blocks evenly distributed along the circumference, fixed on the ring-shaped stainless steel belt along the inner wall of the circumference with copper bolts, and the same pole faces the center of the circle. The remaining magnetic systems are all composed of electromagnetic coils, thus forming a composite magnetic system composed of electromagnetic coils and permanent magnet blocks. Among them, there are 7 electromagnetic coils in total, the upper 4 sets of electromagnetic coils are large coils, and the lower 3 sets of electromagnetic coils are small coils, with an interval of 200-250mm. The upper four coils have more turns and the spacing is smaller to generate a higher magnetic field strength (because the rising water velocity in this area is large); the lower three coils have smaller turns and the spacing is larger. A coil at the top is continuously powered, the purpose is to keep the overflow surface stable and not to "turn over the black and run the mine". The other coils are powered intermittently and at intervals according to a certain time sequence to generate a scintillation magnetic field, so that the magnetic minerals can fully agglomerate-disperse-agglomerate in the slurry. The current intensity of the power supply, the power supply time, the intermittent time and the number of interval coils are all adjustable.
因线圈按上下顺序依次供电，保证了磁性矿物在沉降过程中始终受到向下磁力作用，在磁团聚工艺的基础上，使磁铁精矿矿物颗粒在受到重力作用的基础上，又受到了一个向下磁场力的作用；又因线圈间隔、间歇供电，就使磁性矿物在矿浆中团聚后有足够的分散空间，促进连生体和脉石充分脱离团聚体，所以能够充分地进行上升水水量的添加，能在磁团聚体分散的时候，使连生体和脉石矿物充分脱出，并被上升水流带到顶部从溢流沿流出。筒体顶部直径收缩，截面积减小，上升水流速度加快，以使脱离磁场的杂质尽快随溢流排出。最终达到不但能有效脱出精矿中细粒杂质，又能充分脱掉较粗粒级杂质的目的。Because the coils are powered up and down sequentially, it is ensured that the magnetic minerals are always subjected to downward magnetic force during the sedimentation process. Under the action of the magnetic field force; and because of the coil interval and intermittent power supply, there is enough space for the magnetic minerals to disperse after agglomeration in the slurry, and to promote the joints and gangues to fully separate from the agglomerates, so the amount of rising water can be fully added , when the magnetic aggregates are dispersed, the conjoined organisms and gangue minerals can be fully detached, and brought to the top by the rising current to flow out from the overflow edge. The diameter of the top of the cylinder shrinks, the cross-sectional area decreases, and the speed of the rising water increases, so that the impurities out of the magnetic field can be discharged with the overflow as soon as possible. Finally, the purpose of not only effectively removing the fine-grained impurities in the concentrate, but also fully removing the coarser-grained impurities is achieved.
给水器下面的圆筒和锥体部分相当于一个顶部磁系的永磁高深磁力脱水槽。由上到下，各点矿浆的浓度和比重逐步加大，使比重较小的脉石和连生体进一步被清除，精选作用较强。The cylinder and the cone part below the water feeder are equivalent to a permanent magnet high-deep magnetic force dewatering tank of a top magnetic system. From top to bottom, the concentration and specific gravity of the slurry at each point gradually increase, so that the gangue and associated organisms with smaller specific gravity are further removed, and the beneficiation effect is stronger.
自动调节磁场强度，提高了选别的自适应性。为了使线圈产生的磁场强度能够根据矿浆浓度的变化进行调整，提高其自适应性。在分选区增设浓度检测装置，通过检测分选区的浓度来调整线圈中的电流，当分选区的浓度增大时，加大线圈的电流，增加磁场对矿浆中导磁颗粒的作用力，防止矿粉颗粒不能克服水流的冲刷力而造成溢流翻黑；当分选区的浓度减小时，通过减小线圈中的电流，降低磁场强度防止矿浆中的磁性颗粒由于过大的磁场作用，过分磁化凝聚成团，在磁场消失后又无法打开，而影响选别效果。这一要求的实现是通过比例、积分、微分控制器即PID来实现的，在电磁聚机内部安装液位差计，通过液位传感器检测自给矿区向上的矿浆浓度的变化信号，转化为标准的4～20mA的电流送入PID控制器，通过设定P(比例)I(积分)D(微分)参数及设定值参数SV来自动输出至8031单片机控制板，8031控制板再调节输出对循环可控硅的控制电压来控制循环磁场中线圈的电流以及底部排矿阀的开启程度。另外，在给水器供水管路上装有流量计和电磁阀，由流量计检测水量信号，由PID控制电磁阀的开启度，保持给水量符合设定值信号。这就保证了设备始终处于最佳选别状态，且不用人工操作调整。Automatically adjust the magnetic field strength, which improves the adaptability of sorting. In order to make the magnetic field intensity generated by the coil adjust according to the change of the slurry concentration, and improve its adaptability. A concentration detection device is added in the sorting area, and the current in the coil is adjusted by detecting the concentration of the sorting area. When the concentration of the sorting area increases, the current of the coil is increased, and the force of the magnetic field on the magnetic particles in the pulp is increased to prevent mineral powder The particles cannot overcome the scouring force of the water flow and cause the overflow to turn black; when the concentration in the separation area decreases, the current in the coil is reduced to reduce the magnetic field strength to prevent the magnetic particles in the pulp from being over-magnetized and agglomerated due to the excessive magnetic field. , it cannot be opened after the magnetic field disappears, which affects the sorting effect. The realization of this requirement is achieved through the proportional, integral and differential controller (PID). A liquid level gauge is installed inside the electromagnetic concentrator, and the change signal of the pulp concentration upward from the self-sufficient mining area is detected by the liquid level sensor, which is converted into a standard The 4-20mA current is sent to the PID controller, which is automatically output to the 8031 single-chip control board by setting the P (proportional) I (integral) D (differential) parameters and the set value parameter SV, and the 8031 control board then adjusts the output pair cycle The control voltage of the thyristor is used to control the current of the coil in the circulating magnetic field and the opening degree of the bottom discharge valve. In addition, a flow meter and a solenoid valve are installed on the water supply pipeline of the water feeder. The flow meter detects the water volume signal, and the PID controls the opening degree of the solenoid valve to keep the water supply in line with the set value signal. This ensures that the equipment is always in the best sorting state without manual adjustment.
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Cited By (8)
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| CN102159320A (en) * | 2008-09-18 | 2011-08-17 | 西门子公司 | Device for separating ferromagnetic particles from a suspension |
| CN101219413B (en) * | 2008-01-22 | 2013-04-10 | 福州昌晖自动化系统有限公司 | Technique for manufacturing hyperpure iron extract |
| CN104772211A (en) * | 2015-04-30 | 2015-07-15 | 山东华特磁电科技股份有限公司 | Electromagnetic elutriation fine separation machine |
| CN107890950A (en) * | 2015-10-27 | 2018-04-10 | 张荣斌 | A kind of automatic control system of mine magnetic separator |
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| CN113457264A (en) * | 2021-06-29 | 2021-10-01 | 云南大红山管道有限公司 | Method and device for adjusting grading of iron concentrate slurry conveyed by pipeline, and method and device for filtering iron concentrate slurry |
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| US4316542A (en) * | 1980-07-15 | 1982-02-23 | Zelenov Petr I | Electromagnetic separator |
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| CN85103457B (en) * | 1985-05-10 | 1988-02-24 | 首都钢铁公司 | Magnetic agglomeration gravity separation separator |
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| JP2001212476A (en) * | 2000-01-31 | 2001-08-07 | Nippon Magnetic Dressing Co Ltd | Method for recovering valuable material from used graphite-containing refractory brick |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101219413B (en) * | 2008-01-22 | 2013-04-10 | 福州昌晖自动化系统有限公司 | Technique for manufacturing hyperpure iron extract |
| CN102159320A (en) * | 2008-09-18 | 2011-08-17 | 西门子公司 | Device for separating ferromagnetic particles from a suspension |
| CN102159320B (en) * | 2008-09-18 | 2013-06-19 | 西门子公司 | Device for separating ferromagnetic particles from a suspension |
| CN104772211A (en) * | 2015-04-30 | 2015-07-15 | 山东华特磁电科技股份有限公司 | Electromagnetic elutriation fine separation machine |
| CN104772211B (en) * | 2015-04-30 | 2019-02-19 | 山东华特磁电科技股份有限公司 | Electromagnetism eluriates refiner |
| CN107890950A (en) * | 2015-10-27 | 2018-04-10 | 张荣斌 | A kind of automatic control system of mine magnetic separator |
| CN112427139A (en) * | 2020-10-14 | 2021-03-02 | 清华大学 | Magnetic liquid screening device |
| CN112427139B (en) * | 2020-10-14 | 2021-09-07 | 清华大学 | Magnetic liquid screening device |
| CN113457264A (en) * | 2021-06-29 | 2021-10-01 | 云南大红山管道有限公司 | Method and device for adjusting grading of iron concentrate slurry conveyed by pipeline, and method and device for filtering iron concentrate slurry |
| CN113552510A (en) * | 2021-06-29 | 2021-10-26 | 云南大红山管道有限公司 | An experimental device and method for increasing magnetization of iron concentrate pulp |
| CN113695081A (en) * | 2021-08-24 | 2021-11-26 | 北矿机电科技有限责任公司 | Separator of electric permanent magnet |
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