Treatment of fly ash contaminated with activated carbon

摘要

Fly ash contaminated with activated carbon is treated to neutralize the activated carbon by placing the contaminated fly ash in a rotary mill and introducing ozone. The result is that entrained air in concrete made from activated fly ash will contain greater than 4 percent entrained air.

主权项

1. A method for treating fly ash contaminated with activated carbon so as not to negatively limit the amount of entrained air in concrete made from the contaminated fly ash, comprising the steps of:
grinding fly ash contaminated with activated carbon in an atmosphere of ozone in an activation process that includes a specialized rotary mill having media that is tailored so as to preferentially grind aspherical fly ash particles so as to increase the surface area thereof by breaking the aspherical particles apart, and so as to preferentially rough up the surface of the spherical particles to increase the reactivity thereof by increasing surface area; intergrinding the fly ash with a calcium additive in the activation process to calcium coat the ozone-treated fly ash.