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FEATURE

A D V A N C E D

M A T E R I A L S

&

P R O C E S S E S |

S E P T E M B E R

2 0 1 6

4 5

13

COMMUNICATION SYSTEM AND CLOUD SERVER

The new system also features a wireless data storage

function.DPreadingsandoperatingparametersarerecorded

and sent to a cloud server every two minutes, and can be

adjusted to meet user requirements. Process engineers can

observe the DP reading locally in front of the system inter-

face and check historical data by accessing a customized

website. Stored historical data can help identify and address

furnace operation issues quickly and proactively. For exam-

ple, analysis of DP readings could facilitate planning fur-

nace shutdowns and scheduling preventive maintenance,

which saves the cost of unnecessary maintenance work and

reduces the possibility of unexpected downtime.

SUMMARY

In the sintering industry, continuous monitoring and

control of furnace atmosphere is increasingly important

to improve quality control and reduces costs. Air Products’

continuous dew point monitoring system is designed to

overcome common obstacles to analyzing sintering atmo-

spheres. The system can also be upgraded with an atmo-

sphere control function to automatically adjust flow rates of

nitrogen and hydrogen.

References

1. A. Wehr-Aukland and D. Bowe, Service-Life Extension

of Stainless Steel Wire-Mesh Belts for Sintering Furnaces.

PowderMet 2011 Conf., 2011.

2. T. Philips, et al., Techniques and Tips to Optimize,

Control and Stabilize the Atmosphere Inside a Continuous

Sintering Furnace,

http://www.airproducts.com

, 2016.

3. T. Philips, et al., Controlling Properties of Sintered Steel

Powder Metal Components Using Atmosphere Composi-

tion as a Variable, 2006.

4. J. Tennermann, Furnace Performance Depends on Dew

Point Measurement Accuracy,

Heat Treating Progress,

ASM

International, 2006.

5. Z. Chen and C. Lu, Humidity Sensors: A Review of Mate-

rials and Mechanisms,

Sensor Letters

, Vol. 3, p 274-295,

2005.

6. Zirconia Sensor Theory,

http://www.supersystems

.

com/wp-content/uploads/T4401-1-R1-May2009.pdf, 2016.

For more information:

Liang He is principal application

engineer, Air Products &Chemicals Inc., 7201HamiltonBlvd.,

Allentown, PA 18195, 800.654.4567, gigmrktg@airproducts.

com,

www.airproducts.com/mp. Order Yours Today: www.asminternational.org/handbook4e

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