HomeBase MetalsSuccess for Humboldt Wedag jigging system

Success for Humboldt Wedag jigging system

The success of Humboldt Wedag’s BATAC® pneumatic jigging system has contributed to a worldwide trend which has seen the rejuvenation of jigging in ores, and in particular in iron ore. “The system has repeatedly proven to be an extremely cost effective alternative for coal, ferrochrome, manganese and iron ore recovery,” says managing director Johannes Kottmann.

The company has over 160 successful installations of the BATAC® jigging system worldwide, including eight plants in southern Africa. Kottmann says that jig technology in iron ore was introduced because it has proven to be comparatively more viable to separate or beneficiate iron ore with jigging, than with conventional separation technology when ores have a relative density of greater than 4.

“The prime advantages of the system are its excellent accuracy as well as its relatively small size and low capital costs,” Kottmann says.

The latest PLC controllers incorporated on the BATAC® system allow the amount of air to be set individually for each jigging chamber and, more importantly, an identical pulse frequency can be maintained over the whole area of a large jigging bed. This permits uniform separation for large amounts of material simultaneously at pulse frequencies of anything between 40 and 120 strokes per minute. This technology also provides for jig compartments up to 7 metres wide, which equates to 600 tph throughput in iron ore.

An electronically equipped float senses the thicknesses of the material layers passing over the jigging bed, and uses analogue displacement systems set to work at supersonic speeds.

The design of the hydraulic system, which controls the discharge gates on the BATAC® jig, operates by means of controllers actuated by the main jig PLC, and has been perfected by Humboldt Wedag. The BATAC® jig contributes to a reliable production process. A high level of controllability ensures high accuracies in separation, even if the materials being processed are typically considered difficult to separate.