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用硝酸钕、硝酸铕和混合稀土硝酸盐 3种溶液模拟硝酸镅 (稀土 )溶液 ,研究了它们的微波脱硝转型行为。热分析结果表明 :这些稀土硝酸盐转型为氧化物的温度必须维持在 70 0～ 80 0℃之间 ;微波脱硝时 ,转型温度可维持在 5 2 0℃以上 ,此时 ,尚残留 3 0 %的挥发物未去除 ;微波脱硝后的产物送入快速升温电子炉中于 80 0℃下灼烧 1 5min ,残留的氮氧化物和水份可完全去除。灼烧后的产物保留了微波脱硝产品疏松多孔、易于取出的特性。经X射线衍射分析验证 ,产物与氧化稀土的化学结构完全相同。转型过程中 ,稀土近乎无损失。
Three kinds of solution of neodymium nitrate, europium nitrate and mixed rare earth nitrate were used to simulate the solution of rare earth nitrate, and their microwave denitration transformation behavior was studied. The results of thermal analysis show that the temperature at which these rare earth nitrates should be transformed into oxides must be maintained between 70 0 and 80 0 ° C. In the microwave denitration, the transition temperature can be maintained above 520 ° C, at which time 30% Of the volatiles are not removed; Microwave denitration of the product into the rapid heating furnace at 80 0 ℃ for 15min, the residual nitrogen oxides and water can be completely removed. After burning the product retains the microwave denitrification products loose porous, easy to remove features. The X-ray diffraction analysis confirmed that the chemical structure of the product and the rare earth oxide is exactly the same. During the transformation, almost no loss of rare earth.