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| 含镍磁黄铁矿硝酸浸出液中硝酸镁与硫酸镁的分离 | |
| 引用本文： | 张多默,刘志宏,陈惠光,冈田茂,矢沢彬. 含镍磁黄铁矿硝酸浸出液中硝酸镁与硫酸镁的分离[J]. 中南大学学报(自然科学版), 1989, 0(4) |
| 作者姓名： | 张多默 刘志宏 陈惠光 冈田茂 矢沢彬 |
| 作者单位： | 中南工业大学，中南工业大学，中南工业大学，日本东北大学，日本东北大学 |
| 摘 要： | 硝酸催化浸出是处理金属硫化物的有效方法。用这种方法在较低温度和氧压下成功地处理了含镍磁黄铁,但矿石中的氧化镁与硫酸和硝酸反应生成硫酸镁和硝酸镁,后者消耗了大量硝酸;因而需要分离硫酸镁,返回使用硝酸镁才能保证浸出过程经济地进行。本研究测定了Mg(NO_3)_2-MgSO_4-H_2O系在343K,308K,以及Mg(NO_3)_2-MgSO_4-C_2H_5OH-H_2O系在298K的平衡相图。结果表明,蒸发结晶法及乙醇结晶法均能有效地分离出硫酸镁,但后者更为节能。加10％乙醇即可使硫酸镁与硝酸镁较好分离。 |
| 关 键 词： | 结晶 分离 硫酸镁 硝酸盐 镁化合物 |
THE CRYSTALLIZATION SEPARATION OF MAG NESIUM SULPHATE AND MAGNESISIUM NITRATE IN NITRIC ACID LEACHING SOLUTION OF NICKEL-BEARING PYRRHOTITE |
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| Zhang Duomo,Liu Zhihong,Chen Huiguang,S. Okada,A. Yazawa Central South University of Technology Tohoku University,Japan. THE CRYSTALLIZATION SEPARATION OF MAG NESIUM SULPHATE AND MAGNESISIUM NITRATE IN NITRIC ACID LEACHING SOLUTION OF NICKEL-BEARING PYRRHOTITE[J]. Journal of Central South University:Science and Technology, 1989, 0(4) | |
| Authors: | Zhang Duomo Liu Zhihong Chen Huiguang S. Okada A. Yazawa Central South University of Technology Tohoku University Japan |
| Abstract: | As an effective method for digesting metal sulfides, the catalytic leaching with nitric acidin sulphate system has been used to treat nickel-bearing pyrrhotite successfully at much lower tem-perature than that of high oxygen pressure leaching. In this process, magnesium oxide will react withsulphuric acid and nitric acid to form magnesium sulfate and magnesium nitrate. The latter willconsume a large volume of nitric acid if it is not separated from magnesium sulfate and recovered. In this research, the phase equilibriums of Mg(NO_3)_2-MgSO_4-H_2O system at 343K, 308K and ofMg(NO_3)_2-MgSO_4-C_2H_5OH-H_2O system at 298 K have been studied. According to the phase diagramsobtained, the separation of Mg(NO_3)_2 from MgSO_4 has been discussed in details. The results indi-cate that evaporation and alcohol crystallization are both effective in separating pure magnesiumsulfate from magnesium nitrate. Furthermore, alcohol crystallization results in savings on energy.Addition of 10% ethanol to a Mg(NO_3)_2 and MgSO_4 solution results in an almost complete cry-stallization of magnesium sulfate. |
| Keywords: | crystallization separataion magnesium sulfate nitrate magnesium compound |
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