Scix Impact on DWPF CPC

Impact of Small Column Ion Exchange Streams on DWPF Glass Formulation Melt Rate Studies

“…Bingham plastic model fits given in Table 2 The results were consistent with those in the report on SCIX impacts to the DWPF CPC. 13 MST and ground CST combined with sludge tended to produce a less viscous melter feed slurry at a given insoluble solids loading.…”

“…The preparation of these SME products is documented in a previous report. 13 Simulated DWPF processing of CST and MST resulted in the leaching of most of the sodium from the CST and MST into the aqueous phase of the SME product along with the sorption of varying amounts of the potassium onto the CST (potassium is a fairly minor component of SB10 simulant). The sodium exchange is significant since the source of alkali (frit versus sludge) is known to have an impact on the SME product melt rate.…”

“…13 An earlier DWPF melt rate study on the effect of the alkali source had indicated that alkali in the frit was not equivalent to alkali in the supernate.…”

“…CPC testing had indicated that about four hours at 93 °C was more than sufficient to bring the sodium into the supernate phase. 13 A 30 liter batch of melter feed slurry was prepared containing CST and MST. This slurry was divided in half.…”

Structural Stability Study of Crystalline Silicotitanate Dispersed in Caustic Solutions for Extended Periods

“…This sample contained ground CST from the Small Column Ion Exchange (SCIX) program and had been stored in salt batch supernate simulant. 7 The bottle was shaken, and the CST in the top layer was easily dispersed into the solution, indicating that it had not strongly agglomerated. A photograph of this sample is provided in Figure 3…”