The melt, which contains the heavy metals present in the contaminated sediment, is quickly
quenched. The metals are locked into the matrix of the melt that completely immobilizes them.The solidified melt can be crushed and pulverized by conventional methods or it can be drawn into micrometer-size fibers by fiberization techniques. The fibers can then be easily pulverized and mixed with another appropriate additive to yield construction-grade cement as a product for beneficial use.