Silo to scale
- Ash silo
- rotary valve
- screw conveyor
- weigh hopper
- mixer
A common retrofit: keep the existing ash silo and add a screw, a scale and a mixer underneath.
See a retrofit caseEquipment / Conveyors and feeders
Conveyors and feeders
Screw conveyors, rotary valves, bucket elevators, vacuum conveyors and belt conveyors, moving powder between silos, scales and mixers. Enclosed wherever dust would get out.
Fly ash is fine, sticky and abrasive. It bridges in hoppers, packs in screws and wears the flights away.
So conveyors are chosen for the material, not from a catalogue: manganese-steel screw flights where it wears, steep screws where there's no room for a long run, heat tracing where the ash mustn't pick up moisture, and slide gates where a blockage may need clearing.
What we supply
Six kinds of equipment
- 01
Screw conveyors
Fully enclosed, between silos, scales and mixers. Manganese-steel flights for abrasive material. They can run steep: one retrofit needed more than 40° to fit under an existing ash silo.
Manganese-steel flights · inclines above 40° - 02
Rotary valves and feeders
Rotary valves under silos and hoppers, made in our workshop. Variable-speed star feeders where the process sets the feed rate, and three-way diverters where one silo feeds two lines.
300 × 300 and 400 × 400 mm · VFD - 03
Bucket elevators
Z-type bucket elevators to lift powder where a screw would have to be too long.
Example: about 3 t/h - 04
Vacuum and pneumatic conveying
Vacuum conveyors for compact stations and bag emptying. Bulk ash can also reach the silo from a pneumatic pump or a bucket elevator.
Example: vacuum conveyor ≥ 200 kg/h - 05
Belt conveyors
Discharge belts that carry the mixed product to bagging, trucks or forming, and long inclined belts with a walkway on receiving lines. An overband magnet above the belt can pick out tramp iron.
Example: 400 mm belt, 3 kW - 06
Gates, joints and tracing
Manual and electric slide gates for maintenance, flexible connectors and needle-felt expansion joints. Electric heat tracing and insulation where the ash has to stay hot.
Example: tracing to 170 °C
Where they sit in a line
Three usual runs
Bulk bag to slurry tank
- Bulk bag
- emptying
- lump breaker
- buffer
- star feeder
- weighing screw
- transfer screw
- bucket elevator
- slurry tank
The front end of an ash washing plant, turning bulk-bag ash into a steady slurry feed. The washing and salt evaporation themselves are outside our scope.
Mixer to product
- Mixer
- discharge hopper
- belt conveyor
- bags, trucks or forming
Clearance under the mixer and the belt route are set by the ceiling height and the vehicles on site.
Questions buyers ask
FAQ
How steep can a screw conveyor run?
Steep. On one retrofit a screw ran at more than 40° to fit under an existing ash silo.
How do you deal with abrasive material?
Screw flights are manganese steel where the material wears, and the conveyor is chosen for the material rather than from a catalogue.
What if the powder packs or bridges?
Slide gates where a blockage may need clearing, heat tracing where the ash must not pick up moisture, and variable-speed feeders so the rate stays steady.
What sizes of rotary valve do you make?
Rotary valves are made in our workshop, for example 300 × 300 mm and 400 × 400 mm, on a VFD where the feed rate matters.
Can you convey combustible powders?
Not without an explosion-risk assessment first.
What warranty and after-sales service do you give?
A 12-month warranty on manufacturing faults, spare parts in stock for the life of the machine, 24-hour technical support, and engineers who supervise installation, commission the equipment and train your staff on site.
Next step
Tell us these
- The materialBulk density, particle size, moisture and temperature; is it sticky or abrasive?
- From where to whereDistances, height differences, and the space in between.
- The rateTonnes an hour, continuous or in batches.
- Dust and temperatureMust it stay enclosed, warm or dry?
Where we draw the line
- Large storage silos
- Usually existing or supplied by others. We connect to them.
- Combustible powders
- Not without an explosion-risk assessment.