答复：Process Flow and Basic Process Parameters for Iron Water Bag Magnesium-based Composite Shot Blasting Desulfurization
Shot blasting desulfurization is a kind of surface cleaning and desulfurization method commonly used in metallurgical industry. It is also an important technology in the hot rolling process of seamless steel pipes. It mainly uses high-speed spray steel shot to impact and clean the surface of stainless steel pipe and remove the scale and oxides on the surface of steel pipe simultaneously. In order to improve the corrosion resistance and mechanical properties of stainless steel pipe and the adhesion of the layer, iron water bag magnesium-based shot blasting desulfurization technology has been developed.
1.Process Flow of Iron Water Bag Magnesium-based Composite Shot Blasting Desulfurization Technology
1.1 Dried Iron Water bag→ Lifting Trolly→ Charging Platform→ Vertical Shock Blasting Machine→ Shot Blasting Platform→ Transfer Trolley→ Receiving Frame→ Magnetic Separator→ Dedusting Equipment→ Small Conveyor→ Steel Shot Recovery System→ Cold Water System, etc.
1.2 Detection phase: The safety signs and inspection points of the blasting machine are checked before put into use and the inspection report is checked and accepted according to the design requirements and records.
1.3 Feed phase: the steel pipe is put into place by the conveyor, then transported to the loading platform of the shot blasting machine by the trolley. When starting the shot blasting machine, the steel pipe is automatically loaded and sent to the blasting machine through the push rod.
1.4 Shot Blasting phase: The steel pipe is continuously moved forward under the action of the push rod, and then sent to the shot blasting area in turn by the hook, and shot blasted by the rotary nozzle of the shock blaster.
1.5 Transfer phase: After shot blasting and degreasing, the steel pipe is transported to the lower part of the shot blasting platform for air cooling and released in time. After that, it is taken away manually and placed in the receiving frame or sent to the next process station by the conveyor.
1.6 Magnetic separation phase: Through the magnetic separation device located on the lower side of the shot blasting platform, the scattered steel shots are collected and separated to reduce environmental pollution and improve environmental quality.
1.7 Dedusting phase: The dust generated by the shot blasting is discharged into the dust removal box by the negative pressure system.
1.8 Steel shot recovery phase: The remaining steel shots are transported to the steel shot recovery system, then recovered and separated.
2. Basic Process Parameters of Iron Water Bag Magnesium-based Composite Shot Blasting Desulfurization Technology
2.1 Shot blasting parameters: Material of steel shot is iron-water bag magnesium metal alloy, particle diameter: 0.5 mm-2.0mm; impulse angle from the normal angle of the panel is 45°, steel shot consumption is 8-15 Kg per square meter.
2.2 Magnetic separation parameters: Magnetic induction intensity is not less than 800mT, magnetic field strength is not less than 2500GS
2.3 Dedusting parameters: Air volume of dedusting system ≥ 15000 m3/h
2.4 Steel Shot Recovery System: Steel shot recovery rate≥97%.
To sum up, the application of Iron water bag magnesium-based shot blasting desulfurization technology in the process of hot rolling seamless steel pipe production can not only improve the surface quality of steel pipe, effectively protect the environment, but also provide technical and economic benefits for enterprises.
