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.