7.6 Selection of a blasting pot in considering the wear and tear behaviour
1) Assumption Nozzle: 8 mm Ø Abrasive: slag, specific weight 1.5 Blasting pressure: 8 b
2) to determine based on nozzle table: abrasive capacity = 465 kg/h
(see chapter 9)
3) desired blasting time: e.g. 5 min.
optimal pot size = 465 * 5/60 = 39 kg of abrasive
4) optimal pot size at a blasting time of 5 min. = 39/1.5 = 26 l volume
optimal pot size at a blasting time of 10 min. = 52 l volume
optimal pot size at a blasting time of 20 min. = 104 l volume
optimal pot size at a blasting time of 40 min. = 208 l volume
Wear and tear behaviour:
Wear and tear at vessel and emergency shut-down will be kept at low level by an optimal selection of the pot size according to the demands of the blasting unit.
The application of an air/sand-control is another opportunity to minimize wear and tear. Before the blasting operator switches off the pot switching over to air operation takes place and the blasting hoses are run empty. The subsequent switching off without abrasive reduces considerably wear and tear at the dosing valve and emergency shut-down.
- Table of contents
- 1. Fields of application of abrasive blasting technology
-
2. Blasting technology
- 2.1 Airless blast cleaning
-
2.2 Injection blasting
- 2.2.1 Compressed air blasting (also air blast cleaning or sand blasting)
- 2.2.2 Pressure blasting (injector blasting)
- 2.2.3 Vacuum-compressed-air blasting and vacuum injection blasting
- 2.2.4 Damp blasting
- 2.2.5 Wet blasting
- 2.2.6 Slurry blasting
- 2.2.7 Ice Blasting
- 2.2.8 Water- jetting cleaning and hydro-jetting
- 2.2.9 Wet blasting for fine surface treatment
- 2.2.10 Combination of different blasting methods
- 2.3 Laser cleaning
- 3. Abrasive
- 4. Efficiency assessment of abrasive blasting
- 5. Influence of compressed-air blasting on the surface of the workpiece
- 6. Generation of compressed air
-
7. Plants for compressed-air blasting
- 7.1 Small and medium-sized blasting pots
- 7.2 Large blasting pots
- 7.3 Double-chamber blasting pot
- 7.4 Mixing and dosing valve
- 7.5 Hoses, lengths of hoses, couplings
- 7.6 Selection of a blasting pot in considering the wear and tear behaviour
- 7.7 Increased wear and tear at the blasting pot caused by wrong adjustment
- 8. Remote control and emergency shut-downs
- 9. Jet nozzles
- 10. Stationary blasting halls
- 11. Mobile abrasive blasting equipment
- 12. Laws and provisions