Dr Bilal, basically it is the process the process of calcination that oxidises the organic matter into carbon . But subsequently , dehydration process is also involved to impart a better quality to rock phosphate .
Essaid. First you can do a oxidation of all organic matter, but last carbon in the rock. Second you can used peroxide of hydrogen in pilot plant and look the result.
Essaid. First you can do a oxidation of all organic matter, but last carbon in the rock. Second you can used peroxide of hydrogen in pilot plant and look the result.
Thank you for your answers. I know the calcination process; I look for a bioleaching process (bacteria etc ..)...
I doesn´t know anything about this process use bioleaching process. Howewer I asked you: have you interesting in do a USP/COFECUB use the same projet presente recently? Wy thing you about that ? Its open just a september, 15. A bientot. De tout façon parleron nous en françois.
Phosphates are essential ingredient in the fertilizers used to supply food and feed for mankind and animals. There is no substitute for phosphate rock as a raw material in the production of phosphate fertilizers in the world at this time. As the world population continues to increase, so does the demand for phosphate. Phosphate rocks are complex raw materials and are mainly used in the manufacture of phosphate fertilizers. The composition of these rocks varies from one deposit to another. Therefore, phosphate rocks from different sources are expected to behave differently in acidulation processes. Most of the world's phosphate rocks are of sedimentary origin and are primarily composed of the apatite group in association with a wide assortment of accessory minerals, fluorides, carbonates, clays, quartz, silicates, metal oxides, etc.
Commercial phosphate rocks should not contain more than 8% carbonates (about 3.5% CO2) in order to be economical. The presence of free carbonates in the phosphate rocks usually requires additional acidulent during the manufacture of phosphoric acid and phosphatic fertilizers. Therefore, low grade phosphate rocks are not usually suitable for direct use in acidulation plants unless their tricalcium phosphate content is increased to 70% or more, using conventional methods such as crushing, screening and drying, or some other physical
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