Abstract: A material treating system wherein the material is fed into a reduction furnace or reactor or similar structure whereby portions of the material issue from the furnace in the form of dusts carrying one or more surface reaction products such as oxides, hydroxides, carbonates and carbon containing products. The dust is mixed with from 10 to 40 percent by weight of the material in the form of dust which is untreated and which is, therefore, substantially free of the reaction products. A briquetting press or other agglomerating means is employed for forming the mixture into agglomerated pieces which are then fed as granules, with or without comminuting, into the reactor as part of the reactor charge.