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Numerical and experimental optimization analysis of a jaw crusher and a bubble column reactor
| Content Provider | Semantic Scholar |
|---|---|
| Author | Legendre, Daniel |
| Copyright Year | 2019 |
| Abstract | More and more awareness is now raising in terms of sustainability of industrial processes. Thus the necessity to improve energy efficiency of diverse devices or simplify process schemes arises. Therefore, the importance of increasing the efficiency of these processes energy and material usage as means to reduce harmful emissions has increased. The present research involves the numerical modelling and further experimental analysis of two different process equipment: crushing and grinding (comminution) of ore materials and bubble swarm dissolution in a reactor. Numerical methods are expanded as means to obtain a physical description relevant for engineering purposes. Moreover, experimental methods are developed to sustain validity of the simplifications imposed on the numerical analysis. Concisely in the comminution case, a primary crusher machinery widely employed in industry known as a jaw crusher is used as center for optimization and modelling efforts. This is performed with the goal to explain and describe how energy is used during the crushing and grinding process and how it can be improved. It is widely acknowledged that crushing and grinding machinery are highly inefficient if the study is based only on energy requirements. Typically, estimated values <10%, with most energy dissipated as heat, deformation, noise and internal crack propagation in the ore. First, an energy efficiency is defined in terms of machinery energy use and after-crushed particle size; with the idea to link new surface area created by material breakage to the amount of energy required to produce an effective particle segmentation. Second, a study on design methods for jaw crusher design through empirical methods, allows to estimate rough machinery dimensions and operating conditions for different selection criteria. However, these methods do not provide an insight into the actual particle breakage phenom- |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.doria.fi/bitstream/handle/10024/168863/legendre_daniel.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
