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Phosphorite, phosphate rock or rock phosphate is a non-detrital sedimentary rock that contains high amounts of phosphate minerals. The phosphate content of phosphorite (or grade of phosphate rock) varies greatly, from 4% [1] to 20% phosphorus pentoxide (P 2 O 5). Marketed phosphate rock is enriched ("beneficiated") to at least 28%, often more ...
Annual net imports (positive) and net exports (negative) into the United States of phosphate rock, 1900-2015 (data from US Geological Survey) The US was a long-time exporter of phosphate rock, and from the 1960s into the 1990s a major exporter. The US became a net importer of phosphate rock for the first time in 1996.
Underground soft-rock mining is a group of underground mining techniques used to extract coal, oil shale, potash, and other minerals or geological materials from sedimentary ("soft") rocks. [1] Because deposits in sedimentary rocks are commonly layered and relatively less hard , the mining methods used differ from those used to mine deposits in ...
As of 2005 the Aurora mine had estimated proven and probable reserves of approximately 356 million tonnes of phosphate rock at an average grade of 30.7% P 2 O 5. PotashCorp has rights to exploit an area of 8,900 hectares (22,000 acres) of phosphate-bearing reserves, sufficient to support the mine's operations for around 75 years. [1]
The OCP Group (OCP S.A.) (formerly Office Chérifien des Phosphates) is a Moroccan state-owned phosphate rock miner, phosphoric acid manufacturer and fertilizer producer. [2] [3] Founded in 1920, the company has grown to become the world's largest producer of phosphate and phosphate-based products and it is one of the largest phosphate, fertilizer, chemicals, and mineral industrial companies ...
Phosphate is also used in animal feed supplements, food preservatives, anti-corrosion agents, cosmetics, fungicides, ceramics, water treatment and metallurgy. The production of fertilizer is the largest source responsible for minerals mined for their phosphate content.
US production of phosphate rock peaked in 1980 at 54.4 million metric tons. The United States was the world's largest producer of phosphate rock from at least 1900, up until 2006, when US production was exceeded by that of China. In 2019, the US produced 10 percent of the world's phosphate rock. [93]
Phosphogypsum stack located near Fort Meade, Florida.These contain the waste byproducts of the phosphate fertilizer industry. Between 100 million and 280 million tons of phosphogypsum waste are estimated to be produced annually as a consequence of the processing of phosphate rock for the production of phosphate fertilizers. [5]
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