Research indicating that belt slippage is the main cause of conveyor belt fires on hard rock conveyor belts. The Dafo Forrex Conveyor Belt system was developed to address fires on these belts.
System Summary
- Compliance to Mines Health and Safety Act No 29 of 1996 Chapter 8.9 (3).
- Current state of art in fire suppression does not prevent the belt catching fire.
- Proactive: Detection of overheating conveyance system components, and the cooling of hot components with a Wet chemical system to below ignition temperatures.
- No Fire = No flames, fumes or smoke.
- Increased operator safety, minimized down time.
- Designated area protection with a localized system.
- Requires no pipe reticulation and complex pumps and valve configurations.
- Dedicated system per designated risk area in contrast with complex water systems
- No flooding and associated operational losses.
- Dafo Forrex system requires very little extinguishing agent.
- No water reticulation required for the system.
- Consumes no fed water during discharge.
- A linear rate of rise detector using a capillary tube to detect an increase in temperature proximate to the belt as a function of the rate of change over time (∆t) irrespective of the starting temperature.
- Detects small changes in ambient temperature.
- High speed detection using pressure law.
- Stainless steel capillary extremely robust with high resilience to mechanical damage.
- Mechanical damage will not cause a fire condition only a fault condition.
- Integrity of capillary tube continuously monitored.
- All system components carry approvals from the UL, FM and other institutions.
- The system is robust and capable of enduring high temperature changes and vibration levels.
- Dafo Forrex Suppressing agent inhibits the fire’s chemical chain reaction.
- Dafo Forrex Suppressing agent has a cooling effect upon discharge to reduce the possibility for re-ignition by heat absorption.
- Dafo Forrex Suppressing agent forms a film over the area onto which it is discharged to reduce the possibility for re-ignition.
- Dafo Forrex Suppressing agent has a certified life span of at least 10 years.
- Dafo Forrex Suppressing agent is non-corrosive to steel, rubber, plastics and any other elements making up a typical conveyor.
- Dafo Forrex Suppressing agent is stored in piston container that is not pressurised.
- Operation of the suppression system is not influenced by the orientation of the agent storage tank.
- The system allows for automatic activation by a dedicated control system as well as for manual mechanical activation un-reliant on electrical supply located next to the conveyor.
- Distribution pipework is stainless steel construction.
Installation
