Producing permeable blocks and pavement bricks from molten slag

Studies of the technology of melting and solidifying are underway as a means of detoxification and volume-reduction of municipal solid waste incineration residue. The molten slag does not leach heavy metals, and can be used as concrete gravel and roadbed aggregate. We have produced water-permeable blocks from slags made by a surface-melting furnace and a plasma-melting furnace. Also, we have fabricated and installed pavement bricks using slag from a commercial surface-melting furnace. Both attempts have been successful, as the end results satisfied the required product standards, and showed no heavy-metal leaching.