Donhad manufactures steel balls for mining industries. Their engineers contacted Megasorber
and provided the following information about a noise problem:
- The impact noise generated from hot steel balls dropping onto a rotating steel wheel was extremely loud—up to 125dB(A).
- The rotating steel wheel was constructed with a 12mm thick steel plate.
- The steel balls were still 700°C to 800°C when they reached the wheel.
- It was estimated that the temperature of the steel wheel was about 120°C to 150°C.
- Many soundproofing methods and materials, such as a rubber matt, were trialled but the noise problem persisted.
Hot steel balls
Photos courtesy Donhad Pty Ltd
Key Design Requirements
- The product must have damping capacity for the 12mm thick steel plate.
- The material must be able to survive a high temperature environment.
- The product must be suitable for a heavy industrial environment, such as being exposed to oil, water, etc.
Megasorber engineers took up the challenge and developed a unique, customised soundproofing solution for the project:
Megasorber DIS8 with 3mm thick steel layer on top. DIS8 is a 2mm thick self-adhesive vibration isolation and damping sheet with release liner
on both sides.
- The steel wheel plate was thoroughly cleaned with Megasorber AC5 Adhesive Cleaner.
- After peeling off the release liner, the DIS8 was installed onto the steel wheel plate first.
- After peeling off the second release liner, the 3mm thick steel plate was installed onto the top of the DIS8.
- The top plate was then mechanically fixed (see photo below).
The engineer with the steel wheel treated with Megasorber DIS8 soundproofing system
The Megasorber DIS8 system is mechanically fixed with small bolts on the corners
The soundproofing system reduced the impact noise level dramatically. There were no more complaints about the noise.
Key Features of the Soundproofing System
- Highly effective at reducing noise problem
- Relatively simple and easy to install
- One of the most cost effective solutions
We have put the wheel in operation and it has made a big difference.
—Ian Wilson, Environmental Engineer, Donhad