Mine Tailings Backfill Station
Short Description
Brand: RUICHUAN
Product Origin: Shandong, China
Categories: Mine Backfill Systems
Application: Preparation, classification, mixing, and pipeline delivery of tailings backfill slurry for underground void filling and mine backfilling operations
Product Type: Tailings backfill station
描述
Overview
The Mine Tailings Backfill Station is designed for underground mine backfilling by preparing, classifying, proportioning, mixing, and transporting tailings slurry to underground stopes or mined-out areas. It is an integrated filling system used to support surrounding rock, control ground pressure, reduce surface subsidence, and improve solid waste utilization in modern green mining operations.
The system uses final tailings from the mineral processing plant as the main filling material. Tailings are concentrated, classified, mixed with binder materials and supplementary water, then delivered through pipelines for underground backfilling. This process helps extend tailings storage facility service life, reduces environmental discharge, and supports safer and more efficient mining.
Applications
- Underground mine void filling
- Stope backfilling in metal mines
- Deep mining operations requiring ground pressure control
- Mining under buildings, water bodies, and railways
- Mines with strict subsidence control requirements
- Sites requiring underground disposal of tailings and solid waste
- Backfill systems for environmentally sensitive mining areas
Suitable Materials and Working Conditions Include
- Tailings from mineral processing plants
- Classified coarse tailings sand for mine filling
- Binder materials used in cemented tailings backfill
- Paste backfill slurry systems
- Supplementary process water for slurry preparation
- Continuous mine filling operations with pipeline transport
- Applications requiring high solids concentration and controlled setting performance
Technical Characteristics
- Integrated tailings concentration, classification, proportioning, mixing, and delivery process
- Supports underground disposal and reuse of mine tailings
- Overflow water can be returned to the water pool for reuse
- Hydrocyclone classification separates coarse particles for backfill use
- Continuous weighing and dosing of different materials according to process ratio
- High-density twin-shaft mixing for uniform slurry preparation
- Secondary vertical mixing for improved slurry consistency
- Buffer filtration and pipeline transport for stable underground filling
- Suitable for cemented tailings backfill and paste backfill processes
- Helps reduce environmental discharge and improve tailings utilization efficiency
Optional Configuration / Notes
- System configuration should be selected according to required filling capacity, slurry type, mine layout, and tailings characteristics.
- Cemented tailings backfill and paste backfill process routes can be configured according to project requirements.
- The final equipment list, pipeline arrangement, and control scope should be confirmed according to the site layout and required automation level.
- The source information includes one pumping-related parameter with inconsistent unit expression and it should be confirmed before final publication.
- Detailed engineering design, layout drawing, and equipment sizing are available upon request.
Technical Parameters And Main Performance Indicators
Main Process Flow
| Step | Description |
|---|---|
| 1 | Tailings enter the vertical mixing tank and hydrocyclone group |
| 2 | Supplementary water is added according to process requirement |
| 3 | Stored dry materials are conveyed by screw conveyor to screw quantitative feeder |
| 4 | Different materials are weighed and proportioned according to the required ratio |
| 5 | Classified tailings slurry and proportioned dry materials enter the high-density twin-shaft mixer |
| 6 | Mixed slurry flows to the vertical mixing tank for secondary agitation |
| 7 | The slurry enters the buffer filtration tank for stabilization and separation |
| 8 | Qualified slurry is transported underground through pipelines for backfilling |
Main Equipment
| No. | Equipment | Function |
|---|---|---|
| 1 | Storage Silo | Stores dry auxiliary filling materials |
| 2 | Tailings Mixing Tank | Receives and conditions incoming tailings slurry |
| 3 | Hydrocyclone Group | Classifies tailings and separates coarse fraction for backfill use |
| 4 | Double-Pipe Overflow Screw Conveyor | Transfers material within the backfill preparation line |
| 5 | Screw Quantitative Feeder | Weighs and meters dry materials according to the process ratio |
| 6 | High-Density Twin-Shaft Mixer | Continuously mixes tailings slurry, dry materials, and water |
| 7 | Buffer Filtration Tank | Provides buffering, filtration, and stabilization before pipeline transport |
| 8 | Auxiliary System | Includes transfer pipelines, pumps, water supply pipelines, and control system |
Main Technical Parameters
| Item | Specification |
|---|---|
| Backfill Slurry Mass Concentration | Cemented tailings backfill 64 to 68%; paste backfill 72 to 78% |
| Binder-Sand Ratio | One-step process 3:1 to 4:1; two-step process 6:1 to 10:1 |
| Binder Dosage | 8 to 20% |
| Maximum Aggregate Size | Not more than 5 mm, with at least 90% passing |
| Paste Slump | 180 to 230 mm |
| Bleeding Rate | Not more than 3% |
| Initial Setting Time | 4 to 8 h |
| Final Setting Time | 12 to 24 h |
| Self-Flow Velocity | 1.5 to 3.0 m/s |
| Working Pressure | 2 to 8 MPa |
| Backfill Capacity | 30 to 120 m3/h |
| Layer Height | 2.5 to 3.5 m |
| Curing Time Before Mining Resumes | At least 72 h |
| Design Standard | GB/T 51450-2022 Mine Backfill Design Standard |
Note: Final technical configuration should be confirmed according to tailings properties, filling process route, underground transport distance, and mine production requirement.