Before choosing equipment

Understand how the material behaves

“Bulk material” covers products with very different behaviour: free-flowing grain, light wood chips, fragile pellets, abrasive minerals and irregular scrap do not move or settle in the same way. Record the normal range of bulk density, particle size, moisture, temperature and flow characteristics. Include seasonal and batch variation.

Also document what must not happen. The material may not tolerate breakage, mixing, moisture, excessive drop height or contamination. Dust, combustible atmospheres and static electricity may require specialist controls. Equipment selection begins with these conditions, not with a catalogue capacity.

1. Map the complete material route

Follow the material from production or receipt through storage, processing and dispatch. Mark every transfer, buffer, change of direction, machine, vehicle movement and manual intervention. Add the distance travelled, waiting time and capacity of each step.

This map often reveals that the material flow grew in stages. A temporary stockpile became permanent, or one loader now serves several processes. Challenge the route before optimising individual machines.

2. Identify the system constraint

The line can only sustain the output of its limiting step. Compare actual tonnes per hour with the rated capacity and waiting state of each component. A conveyor may be large enough on paper but repeatedly starved because the hopper is too small or vehicle supply is inconsistent.

Improve the constraint first and then observe where the restriction moves. Oversizing every component raises investment and energy use without guaranteeing more output.

3. Reduce transfers and drop points

Each transfer needs structure, drives, guards, extraction, cleaning and maintenance. It can also generate dust, segregation, noise, breakage and wear. Shorter routes and fewer changes of equipment can make the process both simpler and more reliable.

Where a transfer remains necessary, control impact angle, drop height and feed. Match liners and wear parts to abrasiveness. Make inspection and cleaning accessible without exposing people to moving equipment.

4. Stabilise the feed

A process that alternates between starvation and surges rarely achieves its theoretical capacity. Use suitable buffers, metering or coordinated controls to create a predictable feed. The buffer must be designed for the material; an unsuitable hopper can introduce bridging or uncontrolled discharge.

Track stops by cause. If the downstream machine is often waiting for material, the real improvement may sit upstream in scheduling, storage or discharge—not in a faster downstream drive.

5. Prevent spillage and uncontrolled dust

Measure collected spills and cleaning hours by location. Recurring piles beneath the same transfer are process evidence, not normal housekeeping. Review enclosure, chute geometry, belt loading, seals and the transition between one machine and the next.

Dust control must reflect the material and risk assessment. Enclosure, extraction, grounding, housekeeping and ignition control may all be relevant. Do not increase the feed rate beyond the control system’s design capacity merely to shorten a cycle.

6. Match storage and buffer capacity to operations

Too little buffer causes frequent stops; too much inventory hides problems and occupies capital and space. Size storage around realistic production and dispatch variation, planned maintenance and the consequences of an interruption.

Review how material enters and leaves the store. First-in-first-out, segregation, moisture protection and cleaning may matter as much as nominal volume. A silo or hopper is only useful when it discharges reliably across the expected material range.

7. Choose mobile, stationary or integrated handling deliberately

Mobile equipment can serve different loading points and adapt to changing yards. Stationary equipment can create a stable, dedicated flow and connect closely with production, conveyors, hoppers or silos. Custom integration may be justified where interfaces, safety functions or container handling are specific to the operation.

Compare the full use case: annual volume, number of locations, changeovers, setup time, civil work, traffic interaction, maintenance access and future expansion. Flexibility has value, but unused flexibility should not make every cycle more complex.

8. Use data that explains losses

Tonnes per hour is necessary but insufficient. Combine it with availability, waiting by cause, product loss, energy per tonne, maintenance hours and quality exceptions. Segment by product because a change in density or flow can alter the apparent performance.

Keep reporting close to action. A short daily review of the largest exception is often more valuable than a monthly dashboard no one owns. Use trends to plan maintenance and validate whether a modification created the expected result.

9. Optimise container utilisation at the end of the flow

The final transfer determines how production becomes a transportable load. Track container cycle time, net payload and variation by material. If lightweight or irregular product leaves usable space because it settles poorly, more containers may be required for the same annual output.

Vertical container loading uses an upright container and gravity-assisted filling. For suitable materials, it can improve use of the available volume and create a controlled loading sequence. It does not increase the container’s legal capacity, and dense products may already be weight-limited. Assess the material, current fill rate and complete route before calculating a saving.