跳汰機選礦是重力選礦的主要方法之一，工藝特點是：被選的礦石連續給到跳汰室的篩板上，形成厚的物料層。通過篩板周期地鼓入上升水流，使床層升起松散，接著水流下降（或停止上升）。在這一過程中，密度不同的顆粒發生相對轉移，重礦物進入下層，輕礦物轉入上層，分別排出后即得精礦和尾礦。

鋸齒波跳汰機是在傳統正弦波跳汰機基礎上進行研制的一種新型節能高效的重選設備。與正弦波跳汰機區別在于：跳汰脈動曲線為鋸齒波形，上升水流快而下降水流慢，床層被整體抬起又緩慢下落，有效松散時間長，可大幅度地提高單位篩面的處理能力，降低粒度回收下限，并大量節省篩下補加水。與正弦波跳汰機進行工業試驗對比，踞齒波跳汰機作業回收率提高Sn:3.01%，WO3:5.5%，Pb:1.63%，Zn:2.04%,耗水量減小30-75%。

鋸齒波跳汰選礦，除了很微細的物料外，幾乎可以處理各種粒度的礦物原料。工藝操作簡單，設備處理能力大，并可在一次選別中得到某種最終產品，因此，在生產中應用很廣泛。對于金屬礦石，是處理粗、中、細粒鐵礦、錳礦的主要方法之一，并大量用于選別錫、鎢礦石；跳汰法在處理含金，鉭鈮、鈦、鋯、鉻的原生礦石和砂石的選別亦能獲得良好效果。

礦石中待分離的礦物密度差越大，入選粒度范圍越寬，對于含金砂礦，在給料粒度小于25㎜時，可以不分級入選，回收下限可達0.05㎜，對一般金屬礦石，實行分級入選，可有效地改善分選指標并提高設備的處理能力。

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型液壓徑向跳汰機在國內外已普遍應用在采礦船上作為粗選設備使用。用來選別砂金、錫、金剛石、鎢、赤鐵礦等礦石。

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型液壓徑向跳汰機是由圓形跳汰機發展而來。它由驅動和槽體二部分組成。驅動為機械液壓形式，動力由電機提供，通過變速機構，由減速器的出軸帶動凸輪轉達動，由凸輪推動每個主傳動油缸的柱塞進行周期性往復運動，從而將電能轉換成機械能，再轉換成液壓能。通過液壓管路及各種閥件，驅動從動油缸運動，帶動跳汰機的錐斗上下脈動。

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型跳汰機的沖次調節有兩種結構形式，沖次調節機構的不同，DYTA-7750型跳汰機分二種型號；DYTA-7750型與PYTA-7750型。DYTA-7750型跳汰機采用電磁調速異步電動機來實現沖次的調節，屬無級調節，沖次調節范圍0-90次/分。PYTA-7750型跳汰機采用普扁鼠籠型異步電動機，由皮帶傳遞動力，是通過更換皮帶輪來調節沖次。屬有級調節。隨機配有使跳汰機的沖次為60次/分、70次/分、80次/分，三種皮帶輪。也可據用戶的需要供給60-90次/分間某一沖次的皮帶輪。二種型號各有其優點，用戶可根據需要選用。槽體部分為單元組合式，每個單位由三個跳汰室組成。每一個室內擬一臺梯型跳汰機。根據處理量大小及設備的配置要求可以組成圓形，也可以組合成扇形。采用組合式的優點在于制造、運輸、安裝方便。

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.

跳汰機液壓傳動原理：

Hydraulic Transmission Principle of Jig

本液壓系統主要由液壓泵站，主動油缸、從動油缸、液壓管路及控制伐體組成。液壓泵站主要是加補油用，主動油缸的作用主要是通過凸輪推動柱塞將機械能轉變為液壓能，從動油缸是主動缸傳給的壓力油推動油塞運動將液壓能轉變為機械能。

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.

其液壓傳動過程如下：凸輪12轉動推動主動缸11的柱塞產生壓力油，經單向節流伐10至從動缸13的上腔，推動從動缸活塞向下運動，帶動錐斗1向下運動（還有下動錐斗1的自重和水、礦的重力也往下壓）壓迫從動缸F腔的油液，使下腔產生高壓的液壓油，壓縮高壓蓄能器3內已沖有3.5-4MPa氧氣的皮襄，積蓄了能量。當凸輪由最高點向最低點轉動時，主動油缸柱塞向往外拉，高壓蓄能器將能量釋放，高壓液壓油將從動缸的活塞往上頂。帶動錐體1向上運動，這樣周而復始達到錐體1上下運動（脈動）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（電磁無級調整）、PYTA7750型（皮帶變輪變速）

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