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首页> 外文期刊>Transactions of the Institutions of Mining and Metallurgy, Section C. Mineral Processing and Extractive Metallurgy >Dephosphorization of high-phosphorus manganese ores of southern Orissa and Andhra Pradesh, India, by roasting with sodium chloride followed by leaching in dilute nitric acid
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Dephosphorization of high-phosphorus manganese ores of southern Orissa and Andhra Pradesh, India, by roasting with sodium chloride followed by leaching in dilute nitric acid

机译：印度南部奥里萨邦和印度安得拉邦的高磷锰矿石的脱磷，方法是用氯化钠焙烧，然后在稀硝酸中浸出

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摘要

From the present investigation the following conclusions may be drawn.(1) The phosphorus content of the high-phosphorus manganese ores of southern Orissa and Andhra Pradesh, India, can be reduced to 0.15 percent or less by roasting the ores with 2-6 wt percent NaCl at 750-800 deg C followed by leaching in 0.5-0.75 M HNO_3 at 40-60 deg C for a period of 15-20 min.(2) The reaction between NaCl and phosphorus-bearing minerals at elevated temperature is rapid in the initial stage (15-30 min), but continues slowly to 120 min to reach the desired level of dephosphorization. The subsequent leaching process, however, is very rapid and is complete within 15-20 min at 40-60 deg C.(3) The critical parameters of this method of dephosphorization are the amount of NaCl, the temperature of roasting, the concentration of acid and the temperature of leaching. Optimum values of these parameters have been determined.
机译：从目前的调查中可以得出以下结论：（1）通过用2-6 wt％的焙烧矿石，印度奥里萨邦南部和安得拉邦的高磷锰矿石中的磷含量可以降低到0.15％或以下。在750-800℃的NaCl溶液中，在40-60℃的0.5-0.75 M HNO_3中浸出15-20分钟。（2）在高温下，NaCl和含磷矿物之间的反应迅速。初始阶段（15-30分钟），但缓慢进行至120分钟以达到所需的脱磷水平。但是，随后的浸出过程非常快，并且在40-60℃下在15-20分钟内完成。（3）这种脱磷方法的关键参数是NaCl的量，焙烧温度，酸和浸出温度。这些参数的最佳值已经确定。

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