Sponsored by HWIApr 29 2011
Emisshield ST-1 was coated on the interior of a heat treatment furnace lined with ceramic fibre modules to study the specific benefits provided by the coating. The operating temperature of the furnace was 1350°F/ 732°C.
The Process
Two identical heat treating furnaces were used to temper 1200 lb loads. Of these, one was coated with Emisshield ST-1 on the interior while the other furnace was not coated. Temperature readings were noted at periodic intervals in both the furnaces and tabulated.
The Results
| Time |
Temperature in the furnace coated with Emisshield ST-1 |
Temperature in the uncoated furnace |
| 10:30 a.m. |
200°F/93°C |
200°F/93°C |
| 11:00 a.m. |
1000°F/538°C |
900°F/482°C |
| 11:30 a.m. |
1150°F/621°C |
1050°F/566°C |
| 12:00 p.m. |
1250°F/677°C |
1150°F/621°C |
| 12:30 p.m. |
1350°F/732°C |
1225°F/663°C |
| 1:00 p.m. |
1350°F/732°C |
1300°F/704°C |
| 1:30 p.m. |
1350°F/732°C |
1350°F/732°C |
As can be seen from the table, the furnace coated with Emisshield ST-1attained the operating temperature one hour earlier than the uncoated furnace. It was also observed that the Emisshield coated furnace cooled faster than the other, reaching 600°F/316°C in just 13 minutes compared to 20 minutes taken by the uncoated furnace.
The Benefits
The measurements clearly indicate that applying Emisshield ST-1 can help in reducing the time taken by heat treating furnaces to reach the operating temperature by more than 30%, thus enhancing their efficiency.
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This information has been sourced, reviewed and adapted from materials provided by ANH Refractories Europe.
For more information on this source please visit ANH Refractories Europe.