Dolomite feed size

The concentration profile of oxygen in the bed is fixed by establishing apriori a value for b as 4.5 and that of a as obtained from the assumed values of carbon conversion and sulfur absorption efficiencies. For a given oxygen profile the reaction rate constant, k3(To), and the size of the dolomite feed are varied. The changes in both of these parameters affect the value... 

Van Kauwenberg3 has described the mineralogy and alteration of phosphate ores in Florida. Mineralogical composition varies by particle size. Francolite and then quartz are the most abundant minerals for plus 20-mesh particles (pebble), while the reverse is true for particles in the 20-200-mesh fraction (flotation feed). In the minus 200-mesh size fraction (clay waste) quartz, francolite, wavellite, crandallite, goethite, dolomite, and a variety... 

To alleviate operating difficulties in the pretreater caused by unwanted steam condensation, a nitrogen gas feed was substituted for the steam feed of this pretreater. The coal feed was Illinois No. 6, River King Mine, 20 X 0 mesh. Additives were hydrated lime and dolomite, and additive concentrations used in the coal feed mixtures were 5 and 2 wt %, respectively. The analyses and sizes of the additives were as follows ... 

A relatively "hard-to-burn" feed from the western U.S., with a very impure dolomitic limestone, has 6.7% >125 pm and an acetic-acid insoluble residue of 9.5% >45 pm, the latter comprised of quartz, feldspar, medium to finely crystalline igneous and metamorphic rock fragments, and an abundance of ferro-magnesian minerals (mainly amphiboles and pyroxenes). = 1.6% and = 4.5%. Belite nests (many with tightly packed crystals), solitary belite, and periclase are abundant in this fine- to medium-crystalline clinker. Nevertheless, a high-compressive strength mortar (44.8 to 48.3 MPa) is made, mainly because of the small alite size and the well-scattered solitary belite. 

The beneficiation of raw potash ore into marketable products, similar to potash mining operations, requires a somewhat efferent scheme and equipment for each processing plant. The ore composition (mineralogy), ore grade (K2O content), liberation size (amount of masd-mum particle size required to attow separation of the different minerals), and type and amount of slimes (insolubles such as clay, anhydrite, dolomite, silica, etc.) are different for every deposit, and perhaps may be h W variable writhin a single deposit. Accordingly, themodr, ern potash processir plant must have an ef ient, hic y versatile process to accommodate variations in the feed yet still maintain product quality at as low a production cost as possible. 

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