Slurry A slurry is a mixture of solids denser than water suspended in liquid, usually water. The most common use of slurry is as a means of transporting solids, the liquid being a carrier that is pumped on a device such as a centrifugal pump . The size of solid particles may vary from 1 micron up to hundreds of millimeters. The particles may settle below a certain transport velocity and the mixture can behave as a Newtonian or non-Newtonian fluid . Depending on the mixture, the slurry may be abrasive and/or corrosive.Examples Examples of slurries include: Cement slurry, a mixture of cement , water, and assorted dry and liquid additives used in the petroleum and other industries Soil/cement slurry, also called Controlled Low-Strength Material, flowable fill , controlled density fill, flowable mortar, plastic soil-cement, K-Krete, and other names A mixture of thickening agent , oxidizers, and water used to form a gel explosive A mixture of pyroclastic material , rocky debris, and water produced in a volcanic eruption and known as a lahar A mixture of bentonite and water used to make slurry walls Coal slurry , a mixture of coal waste and water, or crushed coal and water Slurry oil , the highest boiling fraction distilled from the effluent of an FCC unit in an oil refinery . It contains large amount of catalyst, in form of sediments hence the denomination of slurry. A mixture of wood pulp and water used to make paper Manure slurry, a mixture of animal waste , organic matter , and sometimes water often known simply as "slurry" in agricultural use, used as fertilizer after ageing in a slurry pit Meat slurry , a mixture of finely ground meat and water, centrifugally dewatered and used as food An abrasive substance used in chemical-mechanical polishing Slurry ice , a mixture of ice crystals , freezing point depressant, and water A mixture of raw materials and water involved in the rawmill manufacture of Portland cement A mixture of minerals, water, and additives used in the manufacture of ceramics A bolus of chewed food mixed with saliva A mixture of epoxy glue and glass microspheres used as a filler compound around core materials in sandwich-structured composite airframes.Calculations Determining solids fraction To determine the percent solids of a slurry from the density of the slurry, solids and liquid where In aqueous slurries, as is common in mineral processing , the specific gravity of the species is typically used, and since is taken to be 1 , this relation is typically written: even though specific gravity with units tonnes/m^3 is used instead of the SI density unit, kg/m^3.Liquid mass from mass fraction of solids To determine the mass of liquid in a sample given the mass of solids and the mass fraction: By definition therefore and then and therefore whereVolumetric fraction from mass fraction Equivalently and in a minerals processing context where the specific gravity of the liquid is taken to be one: So and Then combining with the first equation: So Then since we conclude that where
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