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Comprehensive recovery – Highest selectivity

MUST SEE. How it works:


Modern preparation plants have to meet increasing requirements with regard to raw material quality and the need to reuse primary or secondary raw materials.

Besides selecting the appropriate constituents during sorting, the new machines for classifying ensure the technical and, thus, also economic success. Since the contaminating constituents (“unwanted materials”, e.g. coal, shale, iron oxide, pumice, shells, …) generally have lower densities as compared to the saleable raw material, density-based sorting is a possible option.

For this reason, STICHWEH jigs are being deployed for more and more preparation processes.

STICHWEH jigs are built in Thüste in cooperation with our partner, Snoby Separation Systems LLC.


This is how the basic process of jigging works.


In order to remove light materials (unwanted particles, e.g. coal, shale, iron oxide, pumice, shells, …) the material is fed into the jig.

A pulsating current of water raises the material and it sorts itself according to its density.

The layer of material is set into a loose fluidized bed-like state by the pulsating upflow of the water.

The light materials fall considerably more slowly than the heavy materials and thus stratification occurs according to the density – i.e. light materials come to the top of the material bed while the heavy materials are concentrated in the lower part.


The light materials are separated off in the upper area. The heavy materials are discharged from beneath the light materials. There are various options available here for the discharge depending on the particle size.

1) Material feed
2) Discharge for light materials/rejected material

Further transportation, e.g., to the tip.
Discharge for heavy materials/acceptable material
3) Discharge for coarse-grained material e.g. through a rotary valve (star gate). 
Then further processing via the dewatering screen/screening machine for classifying.
4) Discharge (e.g. in the case of sand) in the lower section through the bottom gate. 
Then further processing via the dewatering screen or a bucket wheel.


  • Throughput performance of up to 270 t/h
  • High operating efficiency
  • Use of accurate operating data for method selection and pre-calculation of raw material quality
  • Low maintenance
  • Broad particle range
  • Smart control via mobile terminals
  • Automatic discharge control with analogue measurement of layer height during normal operations
  • Excellent material yields for subsequent industrial processing
  • Machine solutions that can be individually configured for your needs


STICHWEH Jig Factsheet