Abstract
This article deals with the assessment of the hazards of dust waste generated by modern CNC (computer numerical control) technologies from the processing of resin-containing plastic composites. The change of the original material into dusty waste predicts the emergence of new hazardous characteristics such as flammability, explosiveness and adverse effects on employee health. The aim of this article is to determine the experimental measurement of dust particle size, its thermal degradation and safety characteristics. Sieve analysis showed that the representative sample contained a 93.8% weight of particles with a size of less than 0.4 mm. Three degrees of thermal degradation of industrial dust samples and heat production (exo reaction ∑ΔH = 9172.9 J/g) were determined by TG (thermogravimetry), DTA (differential thermal analysis) and DSC (differential scanning calorimetr) methods. The measurement safety characteristics such as the lower explosion limit, the maximum explosion pressure, the maximum pressure rise rate, and the calculated cubic constant confirmed that the dust is an explosive, and is determined as explosion class St1 (determined by Cubic constant).
Highlights
Industry 4.0 is commonly referred to as the fourth industrial revolution [1], which significantly relates to the Slovak automotive industry
The first step identified in TG, DTA at 40–70 ◦ C was not confirmed in differential scanning calorimetry (DSC) analysis
Thestep first step was in experimental in a calorimetric bomb, butrealized provide the release safety characteristics were realizedsubstantial in two steps
Summary
Industry 4.0 is commonly referred to as the fourth industrial revolution [1], which significantly relates to the Slovak automotive industry. This is the name for the current trend of automation and data exchange in manufacturing technologies. The scope of harmful effects of dust on humans is very broad [8]. Their assessment depends on the origin, characteristics and size of the dust particles, its concentration in the air, the length and conditions of its action and the individual’s sensitivity to dust [9,10]. It is an essential prerequisite to know the materials used for work as well as the physical and chemical properties along with safety characteristics which predict health and environmental properties of waste [11]
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