2017_E_TYPE-HL.doc Page 42 of 55 24-Oct-2017
6.7 Ash Handling and Disposal
Ash, pigments, dirt or other residual inorganic material from the heat cleaning process
should be removed periodically using an industrial strength vacuum. Ash accumulation will:
• Cause an increase in heat up times in the process chamber, due to absorption of a portion
of the chamber natural gas heat input by the ash.
• Block the firebox heat ports.
• Compact in the cart tracks and restrict movement of the loading cart.
Personnel handling the dust or ash should wear suitable masks as protection from
inhaling the dust when unloading the cleaned parts, or when periodically removing any ash from
the oven floor.
The chemical composition of the ash will depend on whatever inorganic constituents are
present in the organic materials being removed. For example, if the oven is being used for the
removal of cured paint residues, the Material Safety Data Sheets supplied by the paint
manufacturer will list the fillers, pigments, or other inorganic components.
A simple ash analysis on the dust residue would enable determination if the dust requires
special handling. If the ash is deemed to be hazardous, then it must be disposed of by the proper
methods. The local environmental authority must be consulted for the appropriate regulations
governing the disposal of hazardous ash.
6.8 Maintenance Tips
1. It is best to cool any oven slowly. When the process cycle ends, leave the doors closed
until the process chamber cools down to the unloading temperature.
2. Cart wheels should be greased weekly with high temperature lubricant. NS 2000 is
recommended.
3. Clean the unit thoroughly on a regular basis. Be careful not to strike refractory with
cleaning tools. Do not stand on fire-box tiles.
Note: Steel rake or tools should not be used for cleaning. These will cause severe
wear in the floor refractory. A soft broom or vacuum cleaner is recommended
for cleaning.
4. On outside installations, clean top drain holes regularly to prevent rainwater
accumulation. Check the sealant in the joints and reseal as required.
5. Any refractory will crack during usage due to thermal expansion. Minor cracks should
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