The process
Twenty-one stages, and what each one is for.
Redrawn from the company's own printed process chart. Stages 1 to 13 are the micronizer plant; 14 to 21 are the optional coating line that follows it.
The chart is the client's own; only the rendering is new. Scroll it sideways on a narrow screen, or read the stage list below — it carries the same content.
Stage by stage
What happens, and in what order.
Size reduction
Stages 1–7- 1
Crusher
Reduces run-of-mine rock to a feed the mill can take. Jaw crusher, 16 in × 9 in.
- 4
Descendicator
Beater-type disintegrator. Required to bring 30/80 mesh grains to mill feed size.
- 7
Ball Mill
14 ft × 6 ft air-swept ball mill. The grinding stage — everything before it prepares the feed, everything after it separates the product.
Classification
Stages 8–10- 8
Classifier
1000 mm high-efficiency dynamic classifier. Cage speed sets the cut point, and so the fineness.
- 9
Coarse return
Oversize from the classifier goes straight back to the mill inlet. This is what makes it a closed circuit.
- 10
Fine material
Product-size particles travel on in the air stream to the collection stage.
Collection
Stages 11–13- 11
RPJ Bag Filter
Reverse pulse jet filter, cleaned on line, collects the product out of the air.
- 12
Rotary Airlock
300 mm valve discharges the collected powder while holding the pressure difference.
- 13
Blower
400 CFM centrifugal blower draws the air through the whole circuit.
Coating line — optional
Stages 14–21- 14
Elevator-3
Coating line begins. Lifts finished powder to the coating feed hopper.
- 15
Hopper-3
Feed hopper for the coating line.
- 16
Screw Conveyor-1
6 in screw feeder meters powder into the mixer.
- 17
Mixer
Powder and molten stearic acid are brought together.
- 18
Screw Conveyor-2
Carries the treated powder on to the pulveriser.
- 19
Pulveriser
Breaks any agglomerates formed during coating.
- 20
Elevator-4
Lifts coated product to final storage.
- 21
Hopper-4
Finished coated product, ready for packing.
As the works draws it
The same line, from our own CAD assembly.
Each machine named the way the works names it. The chart above is the process; this is the arrangement it is built in.
Jaw crusher · storage tank 1 · descendicator · storage tank 2 · ball mill · classifier · cyclone · jet filter · blower.
The same assembly rendered from the works' three-dimensional model.
Seen as a machine
The same twenty-one stages, built.
Every stage in the chart above is a real machine bolted to a real floor. This is the line as it stands, drawn from the company's CAD assembly.
What the site has to provide
Before the erection team arrives.
Space and civil work
A bay of 40 ft long × 20 ft wide × 30 ft high per micronizer plant. The mill foundation is poured by the customer to a dimensioned drawing AEW supplies; the foundation frame is collected from the AEW workshop.
During erection
Roughly seven days on site. The customer provides a 12–14 tonne crane for three of them, plus oxygen, an LPG cylinder and a welding machine, and food and accommodation for the team. Panel, cables and accessories are bought separately.
Want the process sized to your tonnage?
Send us a target fineness and a required output and we will come back with a plant configuration and a scope of supply.