Bentonite Screening Tech: Powering 2030's 25% New Energy Share

Geological Code: Decoding the Structure of Bentonite

Compositional Characteristics
Bentonite is primarily composed of montmorillonitic (60–90%), whose 2:1 layered structure (silica tetrahedron + alumina octahedron) provides a theoretical specific surface area of 600–800 m²/g (Applied Clay Science, 2023). This “honeycomb structure” serves as a key design basis for vibrating screening processes.

Screening Technology in Processing Stages

Primary Processing Stage
The dry process uses triple-stage vibrating screening (coarse crushing → fine grinding → 200-mesh classification), increasing montmorillonitic purity to 85%. The wet process employs high-frequency vibrating screens for slurry centrifugation, achieving a 90% tailings utilization rate in Liaoning mining areas (2024 Mineral Resources Report).

Equipment Demands in Application Fields

Foundry Industry
Sodium-based bentonite molding sand requires ultrasonic vibrating screening to ensure wet compressive strength ≥120 kPa (GB/T 20973). One company improved casting pass rates by 13% using multi-layer probability screens.

New Energy Sector
Bentonite used for lithium extraction demands ultra-fine 325-mesh vibrating screening. Patent CN202410234567.8 enables precise grading for graphene composite membrane materials.