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A special thermal stress problem in ceramic industry
European Journal of Applied Physiology and Occupational Physiology
|December 15, 1978
Summary
Workers in ceramic factories face severe heat stress during manual kiln unloading. Despite high temperatures (WBGT 43-54°C), their self-selected work-rest periods prevent excessive physiological strain, suggesting a need for systematic regulation.
Area of Science:
- Occupational Health and Safety
- Industrial Hygiene
- Ergonomics
Background:
- Manual kiln unloading in ceramic industries poses significant thermal stress risks.
- High Wet-Bulb Globe Temperature (WBGT) values, ranging from 43-54°C, were recorded inside kilns.
Purpose of the Study:
- To investigate the thermal stress and physiological strain on workers during manual kiln unloading.
- To assess the effectiveness of existing work-rest schedules in mitigating heat stress.
Main Methods:
- Field survey of hygienic conditions in four ceramic factories.
- Measurement of thermal conditions using WBGT values.
- Assessment of physiological strain experienced by workers.
Main Results:
- Severe thermal stress was confirmed, with high WBGT values inside kilns.
- Physiological strain was generally not excessive, even with prolonged work spells.
- Workers appeared to self-regulate work-rest schedules effectively through experience.
Conclusions:
- Workers' experienced-based work-rest schedules mitigate severe heat stress during manual kiln unloading.
- Systematic study and regulation of work-rest procedures are recommended for consistent safety.