Influence of polymers on the grinding and rheology of ultrafine Egyptian calcium carbonate suspension

Mourad, Sabreen; Khalil, Mostafa M.H.; Abdel-Khalek, N. A.; Abdelkhalek, Mohamed; Selim, Khaled A.; Hassan, El-Sayed R. E.

doi:10.37190/ppmp/152163

Cited by 1 publication

(2 citation statements)

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“…The KBr pellet technique was used to record the spectra. The difference spectrum was obtained by subtracting the spectrum of the untreated particles from that of the interacted minerals (Mourad et al, 2022).…”

Section: Ftir Measurementsmentioning

confidence: 99%

“…After conditioning the pulp to equilibrium time, the samples were centrifuged at 15,000 rpm for 15 minutes to separate the supernatant from the settled fraction. The total organic carbon (TOC) content (residual concentration) in 40 ml of the supernatant was determined using a "Phoenix 8000" Total Carbon Analyzer (Mourad et al, 2022).…”

Section: Adsorption Measurementsmentioning

confidence: 99%

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Upgrading and Surface Coating of Egyptian White Sand With Polymers and Silanes

Yassin,

Mourad,

Khalil

et al. 2024

MGPB

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Egypt is endowed with huge reserves of filler minerals, such as silica sand which form approximately 95% of the Earth's crust. The silica sand industry is used in many fields, such as pharmaceutical practices, chemicals, glass, ceramics, electronics, and photovoltaic industries. The aim of this study is to remove impurities from silica sand and apply surface modification processes to enhance its value for various industrial manufacturing applications. Various processing techniques, including classification, attrition scrubbing, magnetic separation, ultra-fine grinding and surface modification, were conducted throughout the study. The results indicated that attrition scrubbing to the classified size fraction of -0.6 + 0.1 mm was capable of reducing the iron concentration from 0.068% to 0.045%. Utilizing the Box-Behnken design, the optimal conditions for magnetic separation were identified, resulting in a decrease in iron content down to 0.012%. Simultaneously, the silica content increased from 99.05% to 99.76%. The results of ultrafine grinding using an attritor mill revealed that a grinding time of 2 hours is sufficient to reach a size suitable for the coating process. Surface modification of the produced ultrafine sand was conducted using polymers and silanes. The treated sand was characterized using SEM, zeta potential, adsorption density, and FTIR measurements. Notably, hydrophobicity increased, accompanied by an increase in particle size. Simultaneously, the surface becomes flatter, indicating the formation of a thin layer. Consequently, the coated sand proved to be a satisfactory material that met the criteria to be used as a filler in coating and paints.

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Section: Ftir Measurementsmentioning

confidence: 99%

Section: Adsorption Measurementsmentioning

confidence: 99%