The application discloses a high-clay-content
coal gangue valuable component gradient
recovery system and process, and belongs to the technical field of
coal solid waste
resource utilization. The application builds a gradient
recovery system composed of a pretreatment unit and a flotation unit, realizes step-by-step efficient
recovery of two valuable components, i.e.
clean coal and
kaolin clay, in the
coal gangue through multi-stage crushing,
grinding, dissociation, particle size grading and
coarse particle pre-enrichment separation, in combination with a switchable preferential floating coal and preferential floating clay double-flotation
route, and the
tailings after removal of the valuable components can be used as
building material raw materials or
soil remediation agent raw materials. The application can flexibly switch the production process according to the ash content characteristics of the
coal gangue feed, adapt to different quality raw materials, and has the advantages of simple overall process, high equipment integration, embeddability in the existing coal preparation
production line, independent
processing of
gangue mountain
solid waste, recyclability of
water resources, substantial reduction of
processing cost, realization of full-component high-value and harmless utilization of the
coal gangue, and high market promotion value.