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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Production of epsom, gypsum and other industrial products from the mill tailings of Jhamarkotra rock phosphate project, India
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Production of epsom, gypsum and other industrial products from the mill tailings of Jhamarkotra rock phosphate project, India

机译：从印度贾马科特拉岩磷矿项目的工厂尾矿生产EPSOM，石膏和其他工业产品

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At the Jhamarkotra rock phosphate mines, the low-grade Proterozoic rock phosphate containing 14-19% P sub(2)O sub(5) is beneficiated by froth flotation process to produce beneficiated rock phosphate having 32-34% P sub(2)O sub(5), to provide raw material for fertilizer plants. The process generates considerable quantity of dolomitic tailings which contain 5-6% P sub(2)O sub(5), 16-18% MgO and 32-34% CaO, that are potentially useful in agriculture. It is therefore necessary to utilize these products to conserve the diminishing, meagre and non-renewable phosphate resources of India. About 1500-1800 tonnes per day (TPD) of dolomitic tailings is produced through the processing of similar to 3000 TPD of the ore, which is collected in the tailing ponds. Investigation carried out on final carbonate tails (FCT) of Jhamarkotra rock phosphate froth flotation beneficiation plant revealed that good quality epsom (MgSO sub(4)-7H sub(2)O)/fertilizer-grade magnesium sulphate, gypsum (CaSO sub(4)-2H sub(2)O) and magnesium ammonium phosphate (MAP) can be produced by leaching FCT with dilute sulphuric acid (30%) at 60-80 degree C and subsequent crystallization through evaporation and cooling. MAP also can be produced, which has citrate solubility of about 96%. MAP has proved to be beneficial for rice crop on acid as well as alkaline soils. Additionally, ammonium carbonate/ carbon dioxide, hydrogen fluoride/calcium fluoride can also be produced. This scheme will certainly help reduce the wastage of these resources, mitigation of pollution and will generate additional revenue to the company.
机译：在Jhamarkotra磷酸盐矿中，通过泡沫浮选法选出含14-19％P sub（2）O sub（5）的低品位元古代磷酸盐岩，以生产P-sub（2）为32-34％的磷酸盐选矿。 O分（5），为化肥厂提供原料。该过程会产生大量的白云质尾矿，其中包含5-6％的P sub（2）O sub（5），16-18％的MgO和32-34％的CaO，可用于农业。因此，有必要利用这些产品来保护印度日益减少的，贫乏的和不可再生的磷酸盐资源。通过处理类似于在尾矿池中收集的3000 TPD的矿石，每天可生产约1500-1800吨（TPD）白云石尾矿。对贾马克霍特岩磷矿泡沫浮选选矿厂的最终碳酸盐尾矿（FCT）进行的调查显示，优质的epsom（MgSO 4（-7）H（2O）/肥料级硫酸镁，石膏（CaSO 4（4）） ）-2H sub（2）O）和磷酸镁铵（MAP）可以通过在60-80摄氏度下用稀硫酸（30％）浸提FCT，然后通过蒸发和冷却进行结晶来生产。也可以生产MAP，其柠檬酸盐的溶解度约为96％。事实证明，MAP对酸性和碱性土壤的水稻作物都是有益的。另外，还可以生产碳酸铵/二氧化碳，氟化氢/氟化钙。该计划无疑将有助于减少这些资源的浪费，减轻污染，并将为公司带来额外的收入。

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