Vaporization of semi-volatile components from Savannah River Plant waste glass
Vaporization of semi-volatile components from Savannah River Plant waste glass
复制标题
萨凡纳河工厂废玻璃中半挥发性成分的蒸发
DOI：
10.2172/6394616
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发表时间：
1978
影响因子：
2.3
通讯作者：
G. W. Wilds
中科院分区：
文献类型：
--
作者：
G. W. Wilds
萨凡纳河工厂废物玻璃化过程中产生的半挥发性废气中，约 90% 是钠和硼的氧化物。这两种氧化物以热稳定化合物偏硼酸钠（Na/sub 2/O）的形式挥发。 B/子 2/O/子 3/。半挥发物的量随着(1)熔体温度、(2)玻璃化时间、(3)熔体表面积和(4)玻璃形成混合物的钠含量的增加而增加。三小时内释放的半挥发物的量在每cm/sup 2/熔体表面1.5至9.0mg之间变化。 3.5 至 4.0 mg/cm/sup 2/ 之间的值是正常熔化条件和成分的典型值。含有 0.06 wt% Cs/sub 2/O 的样品的氧化铯挥发度平均为 0.11 mg/cm/sup 2/。挥发性范围为 0.09 至 0.2 mg/cm/sup 2/。当将TiO/sub 2/ 添加到玻璃熔体中时，Cs/sub 2/O 的挥发性没有被显着抑制。当 Cs 作为负载 Cs 的沸石而不是 Cs/sub 2/CO/sub 3/ 溶液添加到熔体中时，铯挥发性不受影响。在熔体中0.03至0.09重量％Cs/sub 2/O的范围内，当熔体中Cs含量增加时，Cs/sub 2/O的挥发性增加。锂的挥发性较低，并且不受熔化条件或熔体成分变化的影响。锂与钠一样，以偏硼酸盐形式从硼硅酸盐熔体中挥发出来，即 Li/sub 2/O 。 B/子 2/O/子 3/。 （12 张桌子，4 个无花果。）« 更少
Sodium and boric oxides account for approximately 90% of the semi-volatile off-gases that are generated during vitrification of Savannah River Plant waste. The two oxides volatilize as the thermally stable compound sodium metaborate, Na/sub 2/O . B/sub 2/O/sub 3/. The quantity of semi-volatiles increases with increases in (1) the temperature of the melt, (2) the time of vitrification, (3) the surface area of the melt, and (4) the sodium content of the glass-forming mixture. The amounts of semi-volatiles evolved in three hours varied from 1.5 to 9.0 mg per cm/sup 2/ of melt surface. Values between 3.5 to 4.0 mg/cm/sup 2/ were typical for normal melting conditions and compositions. Cesium oxide volatility averaged 0.11 mg/cm/sup 2/ from samples that contained 0.06 wt % Cs/sub 2/O. Volatilities ranged from 0.09 to 0.2 mg/cm/sup 2/. Volatility of Cs/sub 2/O was not significantly suppressed when TiO/sub 2/ was added to the glass melt. Cesium volatility was unaffected when Cs was added to the melt as Cs-loaded zeolite rather than a Cs/sub 2/CO/sub 3/ solution. Over a range of 0.03 to 0.09 wt % Cs/sub 2/O in the melt, volatility of Cs/sub 2/O increased when the Cs content of the melt increased. Lithium volatilitymore » was low and was unaffected by changes in melting conditions or melt composition. Lithium, like sodium, volatilized from borosilicate melts as the metaborate, Li/sub 2/O . B/sub 2/O/sub 3/. (12 tables, 4 figs.)« less