Abstract
Abstract Baghouse dust collectors are using in the drying unit of Beni Idir situated in Beni-Idir Khouribga city, Morocco, to retrieve phosphates particles from dust air-drying before its expulsion through the smokestacks. The phosphate dust samples used in this study were taken from the filtration chamber of the baghouse dust collectors. The first sample (S1) is untreated calcium phosphate dust, the second (S2) is the calcium phosphate dust from the outside of filter media while the third one (S3) is the calcium phosphate dust from the inside of filter media which causes clogging depth. In this paper, the rheology and the small-angle X-ray scattering (SAXS) of the three samples were investigated to elucidate the changes in terms of local structure, the viscosity, and the shear stress parameters. The rheological behavior of the dust samples was investigated for a solid mass concentration ranging from 50 to 60%, the three samples (S1) (S2) and (S3) had a solid mass concentration of C1=60%, C2=55% and C3=50% and a shear rate in the range from 1 to 1000 s−1. The results indicated that during the filtration process, the pseudo-plastic behavior of the dust phosphate changed to that of Bingham. Comparing the results of the sample’s viscosity, we found that the viscosity decreased during the process filtration. The SAXS results suggested that the dust phosphate samples possess a fractal surface structure of enormous dust particles with a rough surface interface. This new study highlights the rheological behavior of grain phosphates that could be extrapolated to other mining powder as grains material or in solution. It is important to understand the rheological characteristics of materials, their flow, and the subsequent deformation of matter as a result of the flow.
Highlights
The protection of the environment is a major concern for all industries whose OCP is part
The analysis of the phosphate dust rheological properties was completed with a rotary viscometer (Anton-Paar), which is associated with a computer that enclosing the rheological data processing software named (Rhéoplus)
About 30 g of phosphate powder was mixed at a different solid mass concentration with water into the following solid mass concentration 60%, 55% and 50% for the samples (S1) (S2) and (S3) respectively
Summary
The protection of the environment is a major concern for all industries whose OCP is part. In this light, OCP group had opted for the dust collectors with sleeves; to comply with the standards of dust emissions into the atmosphere and to respect the workplace exposure limits values for dust. In defining the phosphate dust characteristics as an influencing factor in the performance of the collector system, a number of concerns must be studied. These incorporate rheological properties and the local structure deduced from small angle X-ray scattering. A few studies have employed other experimental techniques such as the SAXS measurements on phosphates powder [8,9,10]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
