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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 2015, the US produced 12 percent of the world's phosphate rock.
For use in the chemical fertilizer industry, beneficiated rock phosphate must be concentrated to levels of at least 28% phosphorus pentoxide (P 2 O 5), although most marketed grades of phosphate rock are 30% or more. [1] It must also have reasonable amounts of calcium carbonate (5%), and <4% combined iron and aluminium oxides.
As of 2015, the top phosphate rock source are Algeria, Egypt, Morocco, Jordan and Peru. [ 9 ] By 2013, 35 percent of Philphos' total production serves the Philippine market while the remaining 65 percent exported to foreign markets namely Vietnam, Thailand, Malaysia, Indonesia and Cambodia, India, Bangladesh, Pakistan, and Taiwan.
This is important because rock phosphate is a key ingredient in many inorganic fertilizers. Hence, a shortage in rock phosphate (or just significant price increases) might negatively affect the world's food security. [76]
For example, mono-ammonium phosphate fertilizer may have a cadmium content of as low as 0.14 mg/kg or as high as 50.9 mg/kg. [89] The phosphate rock used in their manufacture can contain as much as 188 mg/kg cadmium [90] (examples are deposits on Nauru [91] and the Christmas Islands [92]).
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 ...
Atlas Agro plans to build the first-ever carbon-free fertilizer production plant for a cost of $1.1 billion on the land on 150-acres on the northwest corner at the intersection of Stevens Drive ...
Volcanic rocks were thought to be a good source for rock powder but it was determined that it contains toxic elements as well. [3] Research has been done into phosphate rocks, but these too have the issue of containing heavy and radioactive elements. [1] The use of rock powder in remineralization has the potential to help mitigate global ...