Scrap Management Systems to Meet Our Partners' Needs TMS International designs, builds and staffs sophisticated scrap handling, scrap preparation and delivery systems to meet our partners' most rigorous requirements. We provide all the equipment, technology and manpower necessary to run well-engineered, efficient operations for our partners and ensure their ongoing excellence. Slag Handling & Slag Processing TMS International is the North American leader in slag processing and metal recovery. Our pioneering technologies process slag, a by-product of steel making, into useful environmentally beneficial aggregate products. Applications include road construction, asphalt, ready-mix concrete, cement, railway ballast, mining, filtration and agriculture.