A Practical Approach to Replacing Zircon
The replacement of zircon flour and sand is discussed in practical terms. Results of trials using Cerabeads 60 as alternate sand are given. Replacement of zircon flour is discussed. Cassill 85 is demonstrated to have promise for zircon flour replacement. A molten metal lab test was developed to compare various flours to zircon.
Because of market forces, the escalating price of zircon flour and sand has increased the cost of making investment castings. In particular, the cost of the ceramic shell has increased, which erodes the profit on the castings that use zircon in their shell. Thus, lower costs and available alternatives are needed. The higher the