JT、 跳汰機(jī)Gravity Jig

跳汰機(jī)選礦是重力選礦的主要方法之一，工藝特點(diǎn)是：被選的礦石連續(xù)給到跳汰室的篩板上，形成厚的物料層。通過(guò)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(guò)程中，密度不同的顆粒發(fā)生相對(duì)轉(zhuǎn)移，重礦物進(jìn)入下層，輕礦物轉(zhuǎn)入上層，分別排出后即得精礦和尾礦。本產(chǎn)品由原地礦部{wy}指定企業(yè)生產(chǎn)，執(zhí)行行業(yè)標(biāo)準(zhǔn)。

鋸齒波跳汰機(jī)區(qū)別在于：跳汰脈動(dòng)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(shí)間長(zhǎng)，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(jié)省篩下補(bǔ)加水。與正弦波跳汰機(jī)進(jìn)行工業(yè)試驗(yàn)對(duì)比，踞齒波跳汰機(jī)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(xì)的物料外，幾乎可以處理各種粒度的礦物原料。工藝操作簡(jiǎn)單，設(shè)備處理能力大，并可在一次選別中得到某種最終產(chǎn)品，因此，在生產(chǎn)中應(yīng)用很廣泛。對(duì)于金屬礦石，是處理粗、中、細(xì)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，入選料度范圍越寬，對(duì)于含金砂礦，在給料粒度小于25 mm時(shí)，可以不分級(jí)入選，回收下限可達(dá)0.05 mm,對(duì)一般金屬礦石，實(shí)行分級(jí)入選，可有效地改善分選指標(biāo)并提高設(shè)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 serene 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%,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 than25 mm, separation may be carried out without size classification with the lower limit of recovery up to0.05 mm. For ordinary metallic ores, size classified separation is conducted to effectively improve indexes for separation and to enhance handling capability for the equipment.