Research Melter Feed Additives Study.

摘要

The 774-A Research Melter recently completed a series of runs to determine a feed additive capable of increasing the glass melting rate. The experimental plan was based upon operating experiences during West Valley Nuclear Corporation's pilot plant campaigns. Their observations had yielded a correlation of soluble calcium vs glass melting rate. The test plan included three runs using Sludge-Only Frit 165 based feed and three runs designed to vary the amount of soluble calcium. Nitric acid was added to increase the soluble calcium and duplicate the West Valley pilot plant operation, sodium fluoride was added to reduce the soluble calcium (while not reducing the pH), and sodium nitrate was added to check for nitrate effects. The feed treated with nitric acid melted 50% faster than any other material. Nitric acid as a feed additive may allow the glass to become more oxidizing with a less likelihood of forming metals in the glass melt. 2 refs., 1 fig., 5 tabs. (ERA citation 13:050813)