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- W2005431467 abstract "The preparation of Pittsburgh No.8 coal-water slurry requires a clean coal; thus, ash and pyrite must be rejected. For this purpose, Pittsburgh No. 8 coal was floated in the presence of a new family of pyrite depressant. To understand the effect of these reagents on the depression of pyrite during coal flotation, both the surface chemistry and the rheology of coal-pyrite systems must be studied. This paper summarizes the results of flotation tests at a 200 mesh of grind of Pittsburgh No. 8 coal using TEPA reagent for pyrite depression. The flotation results using TEPA show an increase of 5% in pyritic sulfur rejection (equivalent to 20% rejection of the remaining pyrite in the concentrate) at equal combustible material recovery (60%) as compared with the case when no depressant was used. Chemical and electrokinetic studies for Pittsburgh No. 8 coal and pyrite were performed to determine the effect of coal cleaning and that of this new reagent on the surface charges of coal and pyrite. The rheology of Pittsburgh No. 8 coal was also studied in the absence and presence of TEPA and related to the flotation behavior of Pittsburgh No. 8 coal. These studies indicate that TEPA not only makes the surface of pyrite more hydrophilic, but also disperses the system." @default.
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- W2005431467 date "1997-01-01" @default.
- W2005431467 modified "2023-10-16" @default.
- W2005431467 title "Surface Chemistry and Rheology of Pittsburgh No. 8 Coal-Water Slurry in the Presence of a New Pyrite Depressant" @default.
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- W2005431467 doi "https://doi.org/10.1080/07349349708905144" @default.
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