apparatus for recycling self-generated sludge in non-coking coal and fine ore based ironmaking

摘要

PURPOSE: An apparatus for recycling self-generated sludge is provided to increase productivity of the iron ingot manufacturing facility by adding a certain amount of the sludge to a high temperature lump iron manufacturing facility, thereby charging the sludge into a melter gasifier for recycling. CONSTITUTION: The apparatus for recycling self-generated sludge in an iron ingot manufacturing facility using non-coking coal and fine iron ore comprises a dryer(101) sludge that is discharged from a dehydrator(100) and solidified; a pulverizer(102) pulverizing the dried sludge discharged from the drier(101) into a powder shape having grain size of 1 mm or less; a classifier(103) classifying the pulverized sludge powder into a certain grain size; an upper storage hopper(104) in which sludge powder is stored, into which nitrogen gas is supplied through a nitrogen supply pipe(205) so that an inner atmosphere of the upper storage hopper(104) is maintained to the inert state, and on an exhaust port of which a dust collector(105) is mounted; a lower storage hopper(108) which is connected to the lower part of the upper storage hopper(104) by means of a flexible pipe(106) and a cutout valve(107) and equipped with upper and lower level switches(111,112) detecting high and low levels of sludge powder supplied through the cutout valve(107), and on which a weight measuring instrument(109) continuously measuring weight variation of the injected sludge powder is mounted; a rotation discharger which is installed at the lower part of a discharging port of the lower storage hopper(108) to control a discharge amount of the sludge powder as controlling the number of revolutions according to signals of the weight measuring instrument(109); and a blowing pipe(24) supplying the sludge powder discharged from the rotation discharger to a third ore pipe(203) using nitrogen gas.