跳汰机选矿是重力选矿的主要方法之一，工艺特点是：被选的矿石连续给到跳汰室的筛板上，形成厚的物料层。通过筛板周期地鼓入上升水流，使床层升起松散，接着水流下降（或停止上升）。在这一过程中，密度不同的颗粒发生相对转移，重矿物进入下层，轻矿物转入上层，分别排出后即得精矿和尾矿。

锯齿波跳汰机是在传统正弦波跳汰机基础上进行研制的一种新型节能高效的重选设备。与正弦波跳汰机区别在于：跳汰脉动曲线为锯齿波形，上升水流快而下降水流慢，床层被整体抬起又缓慢下落，有效松散时间长，可大幅度地提高单位筛面的处理能力，降低粒度回收下限，并大量节省筛下补加水。与正弦波跳汰机进行工业试验对比，踞齿波跳汰机作业回收率提高Sn:3.01%，WO3:5.5%，Pb:1.63%，Zn:2.04%,耗水量减小30-75%。

锯齿波跳汰选矿，除了很微细的物料外，几乎可以处理各种粒度的矿物原料。工艺操作简单，设备处理能力大，并可在一次选别中得到某种最终产品，因此，在生产中应用很广泛。对于金属矿石，是处理粗、中、细粒铁矿、锰矿的主要方法之一，并大量用于选别锡、钨矿石；跳汰法在处理含金，钽铌、钛、锆、铬的原生矿石和砂石的选别亦能获得良好效果。

矿石中待分离的矿物密度差越大，入选粒度范围越宽，对于含金砂矿，在给料粒度小于25㎜时，可以不分级入选，回收下限可达0.05㎜，对一般金属矿石，实行分级入选，可有效地改善分选指标并提高设备的处理能力。

Ore dressing by Gravity Jig is considered as one of the major means for gravity beneficiation with the process characteristics being continued feed of ores to be beneficiated onto screen plate in Jigging Chamber, forming thick material layer. Upward flow is injected via screen plate periodically, allowing the lift of bed layer to be loose and flow to drop ( or stop rising). During this process, grains of different densities will displace relatively, with the heavy materials bring delivered into lower layer and the light material being transferred into the upper layer. Concentrate and tailings will be obtained after their being discharged respectively.

Sawtooth-wave Jig is a new type of energy conservation and highly efficient gravity separation equipment and developed based on the traditional Sine Wave Jig. The difference between Sawtooth  Wave Jig and Sine Wave Jig is that the pulsation curve for jigging is of sawtooth wave shape ,with speedy upward flow and slow downward flow. Bed layer is elevated integrally and slowly dropped with a long effective loose time, allowing significant increase of handling capacity for unit screen surface, decrease of lower limit of grain size recovery and large save of make-up water for undersize fraction. Industrial tests carried out of Sawtooth Wave Jig and Sine Wave Jig for comparison showed that the recovery rate for operation of Sawtooth Wave Jig is raised by Sn: 3.01%, WO 3:5.5%, Pb:1.63%, Xn:2.04% with water consumption being decreased by 30 – 75%.

Ore dressing by Sawtooth Wave Jig is capable of handling almost full sizes of mineral materials other than very fine material. It features simple process operation, heavy duty equipment handling capacity with final products being obtained through one time separation. Therefore, it has found a wide application in production. It is regarded as one of major means to cope with metallic ores such as iron and manganese ores of coarse, moderate and fine sizes and has found significant use in beneficiating tin and tungsten ores. Moreover, Jigging Method also can achieve a good result in processing primary ores bearing gold, tantalum niobium, titanium, zirconium and chrome and sand stones.

More density minerals to be separated in ores have, wider range the feed sizes have. For gold bearing placer, when feed grain size is less than 25mm, separation may be carried out without size classification with the lower limit of recovery up to 0.05mm. For ordinary metallic ores, size classified separation is conducted to effectively improve indexes for separation and to enhance handling capability for the equipment.

DYTA-7750型液压径向跳汰机在国内外已普遍应用在采矿船上作为粗选设备使用。用来选别砂金、锡、金刚石、钨、赤铁矿等矿石。

DYTA7750  hydraulic radial jigs are widely used on mining vessel at home and aboard as  roughly selected equipment to sort ores such as alluvial gold, tin, diamond,  tungsten and hematite.

DYTA-7750型液压径向跳汰机是由圆形跳汰机发展而来。它由驱动和槽体二部分组成。驱动为机械液压形式，动力由电机提供，通过变速机构，由减速器的出轴带动凸轮转达动，由凸轮推动每个主传动油缸的柱塞进行周期性往复运动，从而将电能转换成机械能，再转换成液压能。通过液压管路及各种阀件，驱动从动油缸运动，带动跳汰机的锥斗上下脉动。

DYTA7750  hydraulic radial jigs are developed from circular jigs. They are composed of  two parts. i.e., drive and tank. The drive is of mechanical hydraulic type  whose power is provided by motor. Through speed-change mechanism, the output  shafts of speed reducer bring along the rotation of cam which drive cyclical  alternating movement of every plunger of drive cylinder so as to convert  electric energy to mechanical energy and then to hydraulic energy. Through  hydraulic pipes and all kinds of valves, the movement of slave cylinder is  driven and the fluctuation of the jig’s cone is brought along.

DYTA-7750型跳汰机的冲次调节有两种结构形式，冲次调节机构的不同，DYTA-7750型跳汰机分二种型号；DYTA-7750型与PYTA-7750型。DYTA-7750型跳汰机采用电磁调速异步电动机来实现冲次的调节，属无级调节，冲次调节范围0-90次/分。PYTA-7750型跳汰机采用普扁鼠笼型异步电动机，由皮带传递动力，是通过更换皮带轮来调节冲次。属有级调节。随机配有使跳汰机的冲次为60次/分、70次/分、80次/分，三种皮带轮。也可据用户的需要供给60-90次/分间某一冲次的皮带轮。二种型号各有其优点，用户可根据需要选用。槽体部分为单元组合式，每个单位由三个跳汰室组成。每一个室内拟一台梯型跳汰机。根据处理量大小及设备的配置要求可以组成圆形，也可以组合成扇形。采用组合式的优点在于制造、运输、安装方便。

The  jig frequency adjustment of DYTA7750 jig has two kinds of forms. According to  difference in jig frequency adjustment mechanism, DYTA7750 jigs have two  models: DYTA7750 and PYTA7750. DYTA7750 jigs adopt electromagnetic speed  regulating asynchronous motors to realize the adjustment of jig frequency which  belongs to stepless adjustment. The adjustable range of jig frequency is 0-90  times per minute. PYTA7750 jigs adopt common squirrel-cage asynchronous motors.  The power is transmitted through belts and jig frequency is adjusted through  the replacement of belt pulley. This belongs to step adjustment. The machine is  equipped with three kinds of belt pulleys which enables the jig frequency of  the jig to be 60 times per minute, 70 times per minute and 80 times per minute.  Besides, belt pulley of a certain jig frequency of between 60 and 90 times per  minute can be provided according to the needs of users. The two types of models  have advantages of their own. Thus, the users can make their choice according  to their own actual needs. The tank is of unit combination type. Every unit  consists of three jigs. Every room is equipped with one trapezoidal jig. It can  be made circular or fan shaped according to the handling capacity and  configuration requirements of equipment. The advantage to adopt combination  type is it is easy for fabrication, transportation and installation.

跳汰机液压传动原理：

Hydraulic Transmission Principle of Jig

本液压系统主要由液压泵站，主动油缸、从动油缸、液压管路及控制伐体组成。液压泵站主要是加补油用，主动油缸的作用主要是通过凸轮推动柱塞将机械能转变为液压能，从动油缸是主动缸传给的压力油推动油塞运动将液压能转变为机械能。

This  hydraulic system is mainly composed of hydraulic power unit, actuating  cylinder, slave cylinder, hydraulic piping and control valves. The hydraulic  power unit is mainly used to add oil. The main function of actuating cylinder  is to convert mechanical energy to hydraulic energy through cam’s propelling of  plunger. The main function of slave cylinder is to convert mechanical energy to  hydraulic energy by the movement of plunger driven through the pressure oil  transmitted by the actuating cylinder.

其液压传动过程如下：凸轮12转动推动主动缸11的柱塞产生压力油，经单向节流伐10至从动缸13的上腔，推动从动缸活塞向下运动，带动锥斗1向下运动（还有下动锥斗1的自重和水、矿的重力也往下压）压迫从动缸F腔的油液，使下腔产生高压的液压油，压缩高压蓄能器3内已冲有3.5-4MPa氧气的皮襄，积蓄了能量。当凸轮由最高点向最低点转动时，主动油缸柱塞向往外拉，高压蓄能器将能量释放，高压液压油将从动缸的活塞往上顶。带动锥体1向上运动，这样周而复始达到锥体1上下运动（脉动）的目的。

Its  hydraulic transmission processes are as follows: The cam 12 rotates and drives  the plunger of actuating cylinder 11 to produce pressure oil. It, through the  one-way throttle valve 10 to the upper chamber of slave cylinder 13, drives the  piston of slave cylinder to move downward and bring along the cone 1 to move  downward (it is also pressed downward with the weight of lower cone 1 and the  gravity of water and mineral), press the oil in F chamber of the slave cylinder  to get the lower chamber to produce high-pressure hydraulic oil. There has  already been leather bag with oxygen of 3.5-4MPa in the compressed high-pressure  accumulator 3 which accumulates energy. When the cam rotates from the highest  point to the lowest point, the actuating cylinder plunger is pulled outward and  the high-pressure accumulator releases energy. The high-pressure hydraulic oil  pushes the piston of the slave cylinder upward and brings along the upward  movement of cone 1. In this ways, cyclic up and down movement (pulsation) of  cone 1 is achieved.

DYTA7750型（电磁无级调整）、PYTA7750型（皮带变轮变速）

DYTA7750 type (electromagnetic stepless  adjustment), PYTA7750 type (belt variable wheel speed)