Chapter 6 - centrifugal cleaning

Question 1

Some general basic centrifugal blast setups include?

Answer 1

Tumbling mill
Multi table
Plain table
Swing table
Custom designed systems

Question 2

Centrifugal blasting conveyor system are commonly used for cleaning of?

Answer 2

Plate
Rolled structural shapes
Large trusses
Girders

Question 3

Portable centrifugal blasting systems can be used on?

Answer 3

Ship decks, hull sides, and bottoms
Storage tanks
Concrete floors

Question 4

Generally centrifugal blast systems are composed of the following elements?

Answer 4

Centrifugal abrasive throwing wheel
The blast cabinet (or enclosure)
In fixed systems, some type of material handling system
Abrasive recycling system 
A dust collector and vent-pipe system
Abrasives

Question 5

The efficiency of the centrifugal blast wheel(s) depends on several factors. What are they?

Answer 5

Abrasive operating mix
Size of the abrasive
Velocity of the abrasive coming off the wheel
Quantity and direction of the thrown abrasive
Condition of the feed parts

Question 6

Low amperage readings on a centrifugal blasting machine could signify ?

Answer 6

An abrasive-starved wheel

A flooded or choked wheel

Question 7

The function of the centrifugal blasting machine separator include?

Answer 7

To control the sizing of the abrasive mix
To remove sand, spent abrasives (fines), rust, dirt, and any other contaminants from the abrasive stream
To control abrasive consumption

Question 8

A well-balanced operating mix (working mix ) of abrasive size will?

Answer 8

Provide consistency of the finish.
Ensure uniform abrasive coverage.
Ensure conditioning of the abrasive for optimum cleaning.
Minimize lowest abrasive and machine part-wear and reduce downtime for a maintenance.

Question 9

Some of the inspection concerns during centrifugal blasting include?

Answer 9

Monitor the dust collector.
Monitor the amperage of the wheel motors /low amperage
Monitor the handling and loading of the conveyor line for contaminates/ possible discontinuities in the steel.
Monitor the speed of the line.
Inspect the steel as it leaves the production line.