The technology of processing and dewatering finely grained sludge from a coal cleaning plant

Summary

Introducing a self-contained «Slime water treatment module» at the «Kurakhovskaia» Central coal cleaning plant (Ukraine) is considered. Actually the module is an advanced analogue of a water-slurry system at the coal cleaning plant. Using the module provides for successful handling environmental issues with the help of the advanced automation means and a minimum personnel number. The technology of slime water treatment and waste dewatering is implemented in the module that is an automated equipment chain that allows extracting fine grained sludge (particle size less than 0.5 mm) from industrial wastewater, sludge dewatering to make it transportable, and returning the effluent into the beneficiation cycle at the plant. In the module solid matter is precipitating in laminar settlers, and thickened product is dewatered in high speed decanter centrifuges. To stimulate the sedimentation process aqueous solution of polyacrylamide-based flocculant is used.

Key words

lamella settler , coal beneficiation , slime water treatment , sludge tank , sludge dewatering , decanter centrifuge , process water