Chemical analysis by X-ray fluorescence

A wet-process plant making cement from shale and limestone has been described by BergstromfRoc/ Prod., 64—71 (June 1967)]. There are separate facilities for grinding each type of stone. The ball mill operates in closed circuit with a battery of Dutch State Mines screens. Material passing the screens is 85 percent minus 200 mesh. The entire process is extensively instrumented and controlled by computer. Automatic devices sample crushed rock, slurries, and finished product for chemical analysis by X-ray fluorescence. Mill circuit feed rates and water additions are governed by conventional controllers. 

NMR spectra, and chemical analysis by X-ray fluorescence, the five samples El to E5 are dioctahedral 2 1 layer silicates, mainly constituted of Si and Al as framework-forming elements, containing Al for Si substitutions in tetrahedral layers and fluorine for hydroxyl groups substitutions. 29Si MAS NMR spectroscopy gives rise to their (Si/AI)iv tetrahedral ratio with a good reliability (Table 10-5). The well-controlled and well-known hydrogels composition indicates that only dioctahedral layer silicates, with two Al and one vacancy per... 

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See also in sourсe #XX -- [ , , ]

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