This equipment can remove all contaminants such as welding slag, oxide scale, oil stains, and paint from the surface of metal structural parts, exposing a uniform metallic base color and improving the adhesion between the structural parts and the coating. The sandblasting derusting grade reaches Sa2.5 (according to GB/T8923-88), with a cleaning efficiency of ≥20m2/hour/single gun.
This cleaning equipment has the following advantages:
1. Simple and reliable structure, easy operation, and good processing efficiency.
2. Equipped with a honeycomb floor, the abrasive circulation does not require screw conveyors, bucket elevators, etc., resulting in less wear and low maintenance workload.
3. Equipped with an abrasive separation and sorting device, high abrasive utilization rate, and high sandblasting cleaning efficiency.
4. The airflow in the sandblasting room is from top to bottom, which facilitates the suction of abrasives and dust, providing good operational visibility.
5. No pit required, low infrastructure cost.
6. Uses boron carbide wear-resistant sandblasting nozzles, with a long service life.
7. Environmentally friendly and pollution-free.
1. Working Principle
The workpiece is placed on a flat car, and the flat car enters the cleaning room. The large door is closed, and the manual shot blasting system accelerates steel shot to impact and scrape the workpiece surface, removing oxide scale, rust, and contaminants. After cleaning, the large door is opened, and the workpiece is moved out of the cleaning room.
Scattered steel shot, dust, oxide scale, etc., pass through the floor drain plate into the scraper trough for transport to the separation and recovery system. After separation by the separation system, usable steel shot enters the storage hopper for continued use; dust and impurities are drawn into the dust collector, filtered by the dust removal system, with clean air discharged into the atmosphere, and dust impurities stored in a waste bin for periodic cleaning.
2. Process Flow
Cleaning Operation Process Flow
Loading workpiece → Moving workpiece into cleaning room → Closing large door → Manual shot blasting cleaning → Manual air blowing to sweep workpiece surface → Opening large door → Moving workpiece out → Unloading workpiece
Shot Circulation Flow
Storage in shot hopper → Flow control → Entering shot blasting tank → Shot blasting cleaning of workpiece → Falling into scraper trough → Entering longitudinal screw conveyor → Elevator → Air separation → Entering storage shot hopper
Dust Removal Workflow
Natural air intake from upper part of cleaning room → Dust in sandblasting room descends into suction floor → Dust enters dust removal pipeline → Filtered by bag filter dust collector → Dust removal fan → Clean air discharged into atmosphere
2. Equipment Overall Performance Parameter Table
| Serial Number | Item | Value |
| 1 | Equipment Composition | Heavy-duty flat car, shot blasting room, shot circulation system, shot recovery system, dust treatment system, electrical control system, etc. |
| 2 | Processing Specifications | |
| | Workpiece | (1) Width ≤5000mm |
| (2) Height ≤5000mm | ||
| (3) Length ≤12000mm | ||
| 3 | Processing Material | Q235, Q345, Q390; |
| 4 | Quality Standards | (1) Surface cleanliness GB8923-88 (ISO8501) Sa2.5 level; (2) Surface roughness GB1031-1995, 40um-70um; |
| 5 | Environmental Indicators | (1) Workplace noise "Industrial Enterprise Noise Hygiene Standard" GBJ87-85 ≤85dB(A) (2) Dust removal system "Air Pollutant Emission Standard" GBJ16297-1996; Dust emission concentration:≤10mg/m³ |
| 6 | Power Consumption | |
| 7 | Installed Power | Approximately 51.5kW (excluding air compressor) |
| 8 | Compressed Air | Consumption: 12~44 m³/min Pressure: 0.4~0.6 MPa |
Main Technical Parameters of Sandblasting Room:
(1) Sandblasting Room
Working dimensions of the chamber (L×B×H): 15m × 8m × 7m
Door opening dimensions (W×H): 6.0m × 5.5m
Door structure: Manual flap folding door
(2) Abrasive used Brown corundum and steel grit type
(3) Shot blasting machine model: Q0250-Ⅱ-LX shot blasting machine
Quantity: 1 unit
Number of spray guns: 2 pieces
Sandblasting tank volume: 0.7m3
Nozzle diameter: Ф10mm
Air consumption per spray gun: 6.1 m³/min
Cleaning speed per gun >20 m²/h
Output per spray gun: 1750-2000 kg/h (steel shot)
Shot blasting working pressure: 0.6～0.8 MPa
(4) Illuminance 500 Lux
Lighting type LED light
Number of lights 23 units
Lighting power 23X0.15=3.45 kW
(5) Workpiece entry/exit mode End entry/exit type
(6) Rail
Gauge: 1.435 m
(7) Flat car (provided by user)
Table dimensions:
Load capacity: 40 tons
Table grating: Non-accumulating sand
Application: For use in sandblasting chamber
(8) Shot separator
Shot and dust separation method: Two-stage separation, stepless adjustment
Separation capacity: 15 t/h
(9) Bucket elevator
Quantity: 1 set
Lifting capacity: 30 T
Reducer power: 2.2 kW
(10) Bottom belt conveyor
Quantity: 1 set
Conveying capacity: 30 T
Reducer power: 2.2 kW
(11) Scraper conveyor:
Conveying capacity: 10 T
Push cylinder: QGBQ100×500
Quantity: 3 sets
(12) Dust removal system
Spray booth dust removal air volume: 48000 m³/h
Power: 45 kW
Filtration area: 768 m²
Filtration method: Cartridge filtration
Cleaning method: Pulse reverse blowing
Cleaning air consumption: 1 m³/min
(13) Total power: Approximately 55.5 kW
(14) Total air consumption: Approximately 13.4 m³/min
(15) Dust emission concentration: <10 mg/m³
(16) Ventilated sandblasting suit
Quantity: 2 sets
Air pressure: 0.2-0.4 MPa
(17) Power supply: AC 380V±10% 50Hz Three-phase five-wire system
Ambient temperature: -5°C to +45°C
Relative humidity: ≤ 95%
Humidity: <50%
(18) Sand material types and particle size usage range: Steel grit G40-G16 (diameter 0.4-1.2mm)
Steel shot S170-S460 (diameter 0.8-1.2mm)
Quartz sand, corundum type 16-180 mesh
Other types of abrasives (with non-standard recovery and separation system)