| 摘要 |
PURPOSE:To control sintering speed adequately and to improve the hot reduction powdering index and cold strength of sintered ore in the stage of producing sintered ore with a Dwight-Loyd sintering machine by detecting the moisture in sintering raw materials by making use of neutrons. CONSTITUTION:Pallets 3 of a Dwight-Lloyd sintering machine are rotated by means of a sprocket 31. Bedding ore and moisture-controlled sintering raw materials are loaded onto the pallets from a bedding hopper 33 and a charging hopper 34 to a uniform thickness. The carbon materials in the sintering raw materials are ignited by an ignition furnace 35 and the heat is retained by a heat retaining furnace 36. Air is passed from the top to the bottom surfaces to sinter the raw materials. In this case, neutron moisture meters 2 consisting of neutron sources 21 in the lower parts of the pallets and neutron detectors 22 are disposed in the midway of the pallets 3. While the neutrons emitted from the sources 21 pass through the sintering raw material layers, the neutorons are converted to thermal neutrons according to the varying contents of the moisture contained in the raw materials; therefore the moisture in the sintering raw materials is detected precisely by measuring the transmittance of the neutrons through the sintering raw materials with the detectors 22, by which the sintering operations are controlled optimally. |
