Gasification, slagging, melting, and vaporizing components of waste materials and reactive carbon fuel, in variable proportions, at low pressures, using oxygen and steam reactants, effects very high temperatures, producing syngas (14) (hydrogen and carbon monoxide), molten slag (24) and molten metals (32). Integration provides steam and electricity from cogeneration plants (47). Treatment of coal or thermal separation of coal-methanol suspensoids, delivered by pipeline, provides the reactive carbon fuel. Syngas is cleaned and purified, then used to produce methanol (15), ammonia, or methanol and ammonia. Foamed light-weight nodules (aggregates) (22) and dense rock-like aggregates (27) are produced from molten slag. Recovery of molten metals effects optimum recycling. Some metals are produced by thermochemical reduction reactions. Byproducts of syngas cleaning are recovered and marketed. No remaining solids, no disposal problems.