Publications by authors named "Deng-Pan Nie"
Barite ore is typically associated with difficult-to-remove vein minerals, but commercial barite products require a high BaSO content. We investigated the occurrence state of fluoride in barite ore using various analytical techniques, which indicated that elemental fluorine in barite predominantly exists as fluorite. Fluoride was then leached from barite ore via complexation.
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- - This paper introduces a multiple headspace extraction (MHE) method for measuring the water vapor transmission rate of cellulose-based papers.
- - The MHE technique, combined with gas chromatography, effectively measures the amount of water vapor in a closed vial, showing high precision (relative standard deviation < 3.49%).
- - The study concludes that this method is both fast and accurate, making it a promising tool for future research on cellulose-based paper properties.
The present study aimed to understand the pyrolysis characteristics of phosphorus tailings and promote the resource utilization of phosphorus tailings. Thermogravimetry was combined with Fourier transform infrared spectroscopy-Raman spectroscopy-mass spectrometry (TG-FTIR-RS-MS) and kinetic models to investigate the possible reaction mechanisms during the pyrolysis of phosphorus tailings and the changes in the release characteristics of pyrolysis volatiles. The results showed that the pyrolysis process occurred in three different stages.
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- - This paper presents a method for measuring carbonate content in barite ore using headspace gas chromatography, which involves converting carbonate to CO through an acidification reaction.
- - The accuracy of measurements is influenced by the pressure changes in CO and O signals, and a theoretical model is used to determine the carbonate content based on the CO to O intensity ratio.
- - The method demonstrated high precision and accuracy, with the ability to fully react carbonate in a 3 g sample within 5 minutes under specified conditions, making it a quick and reliable option for batch analysis.
Article Synopsis
- * The procedure involves roasting the ore with sodium and potassium carbonates after treating it with hydrochloric acid, and then analyzing the gas produced by measuring CO to O signal ratios.
- * The method is noted for its high precision and accuracy, making it suitable for industrial batch testing of BaSO content in barite ores.