Phosphate rock mining, along with the inorganic fertilizers and animal feed supplements for which phosphate is mined, pollute our air, contaminate our water and destroy invaluable wildlife habitat. Especially in Florida.
Mining first began in the United States in 1867 in South Carolina. Phosphate rock was discovered in central Florida in the 1880s, and because of the extensive, high-quality deposits and lower mining cost, it quickly became the leading phosphate-producing state. Currently, phosphate rock is mined in Florida, Idaho, North Carolina and Utah.
rock phosphate can become soluble and available to plants either by chemical weathering or through the actions of certain types of plants. The solubility also depends on rock type and the pH of the soil; phosphorus is most soluble when contained in sedimentary rocks as opposed to igneous rock, and when soil pH is between 5.5 and 7.2.
The phosphate mining industry employed 2,200 people. The value of phosphate rock mined was US$2.2 billion. As of 2015, there are 10 active phosphate mines in four states: Florida, North Carolina, Idaho, and Utah. The eastern phosphate deposits are mined from open pits. The western deposits are mined from both surface and underground mines.
Phosphate Rock. The term phosphate rock or phosphorite is used to denote any rock with high phosphorus content. The largest and least expensive source of phosphorus is obtained by mining and concentrating phosphate rock from the numerous phosphate deposits of the world.
Most phosphate mining is conducted as open-pit mining rather than subsurface mining. In a typical mining operation, a layer of topsoil and other material is removed and placed into already-mined areas. Large dragline excavators then extract the phosphate rock from the ground.
Phosphate rock can either be sedimentary, which is the most common one being mined today, or igneous. To use phosphorus for commercial use, it must be either treated with sulfuric acid or put in ...
This hard-rock phosphate was mined in a region extending from Alachua to Citrus counties. The mining of pebble phosphate began in 1888 in central Florida and in the 1960s in Hamilton County. Today phosphate mining occurs primarily in the central Florida area Polk, Hillsborough, Manatee and Hardee counties .
Phosphate rock comes from geologic deposits lo ed around the world. Its main constituent is apatite, a calcium phosphate mineral primarily extracted from sedimentary marine deposits, with a small amount obtained from igneous sources. Most phosphate rock is recovered through surface mining, although some is extracted from underground mines.
Phosphorus is mined primarily as phosphate rock, a fairly common rock found worldwide. It takes about 1 ton of phosphate to produce 130 tons of grain, although this figure is highly variable depending on soil conditions, farm history, crop type, and fertilizing efficiency Vaccari, 2009 .
Phosphate rock phosphorite mining is the fifth largest mining industry in the United States in terms of quantity of material mined. In 1989 the total production of phosphate rock in the U.S. was estimated at 38 million metric tons MT . Most phosphate production leads to the making of fertilizers.
Phosphate rock mining is the fifth largest mining industry in the United States in terms of the amount of material mined. The phosphate industry is concentrated in the southeastern United States. About 90% of phosphate is mined in Florida, North Carolina, and Tennessee.
CHANHEN owned large phosphate mine --LAOHUDONG phosphate mine lo ed at Weng’an county Guizhou province, the mining area is 5.3 square kilometers, the ore body length is 3.8 kilometers, theaverage thickness is 26m, total reserves is 365 million tons, the average gradeis 27%; associated fluorine resource is 6 million tons, iodine resources is 6200 tons.
Phosphate Rock Mineralogy Figure 1: Fluorapatite crystal on matrix from the Urbano mine, Golconda District, Minas Gerais, Brazil. Photo: RRUFF project www.rruff.info . Phosphate rock describes an imprecise series of minerals, all belonging to or variations of the apatite group of minerals Figure 1 .
Monazite Mining. All monazite mining is focused on placer deposits because they are easier to mine and the monazite is often present in higher concentrations than in hard rock deposits. Other heavy minerals that accumulate with monazite include gold, platinum, magnetite, ilmenite, rutile, zircon, and a variety of gemstones. The heavy sands ...
Uses of Apatite as Phosphate Rock. Most of the phosphate rock mined throughout the world is used to produce phosphate fertilizer. It is also used to produce animal feed supplements, phosphoric acid, elemental phosphorous, and phosphate compounds for the chemical industry.