All fertilizer phosphorus comes from phosphate rock tricalcium phosphate The phosphorus in the rock is not readily available to crop plants because the natural rock contains 1 to 3 percent of fluorine and this makes the phosphorus soluble with difficulty Nevertheless it has been and still is the practice to grind the rock very finely and
·Rock phosphate has long been one of the most widely used soluble organic fertilizers known for promoting healthy growth and development of plants Ever since it was first discovered in central Florida in the 1880s it has been widely used in the United States the country is the world s leading producer and consumer of phosphate rock
·Rock phosphate is derived from phosphate rich sedimentary rocks and is used as a fertilizer to supply Phosphorous P to plants Vegetable gardens regularly amended with compost do not need additional P fertilizers infact high P is a common finding in soil tests by gardeners who use manure based composts in their garden
Question It is desired to crush 100 ton/h of phosphate rock from a feed size whre 80% is less than 4 in to a product where 80% is less than 18 in The work index is a Calculate the power Calculate the power require to crush the product further to where 80% is less than 1000mm
·Rock phosphate is most commonly used as an agricultural fertilizer It can be applied to fields as a powder liquid or slurry Depending on the application rock phosphate can be mixed with other ingredients such as water and lime to form a slurry or liquid fertilizer solution
·a The power required to crush the phosphate rock b The power requires to crush the product further where 80% is less than 1000pm Solution Using Bond s Law of size reduction P = Therefore the power requires is b
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