One of the leading methods to utilize waste incineration ash is the melting treatment, but this method has a disadvantage of high cost, because it requires plenty of energy. In search of technologies for effective utilization with less energy consumption and cost, we Kawasaki are now developing a novel technology where hydration reaction is applied. In the technology, waste incineration ash is solidified after the hazardous heavy metals contained are stabilized by mixing and mulling with additives and water, and then curing with steam. With this, solidified material can be used as civil engineering materials such as roadbed materials. In this report, the results of tests to manufacture sand and crushed stone utilizing waste incineration ash from stoker furnace are described.
