Abstract:
PROBLEM TO BE SOLVED: To provide a method of producing economically recyclable high concentration zinc cake of a zinc concentration of at least 40%, by efficiently separating zinc present in a waste galvanization solution from iron at low cost.SOLUTION: A zinc composition including at least 40% of zinc per dry weight is recovered by an air-oxidation process of adding an alkali into a waste galvanizing solution comprising a zinc ion and a ferric ion each at least in a predetermined concentration and further comprising heavy metal to maintain its pH in a range of 4.5 to 5.5, blowing air thereinto to oxidize the ferric ion to a ferrous ion, and subsequently precipitating the ferrous ion as ferrous hydroxide; a first solid-liquid separation process of adding a chelating agent into the treated solution obtained and subsequently carrying out solid-liquid separation; a pH adjustment process of adding an alkali to the separated solution obtained to control its pH between 8 and 11 to precipitate zinc hydroxide; a second solid-liquid separation process of subjecting the treated solution obtained to solid-liquid separation; and washing the solid matter obtained.
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus for peeling off a glass scattering prevention film for fluorescent lamps, which when a straight tube type fluorescent tube with the glass scattering prevention film is disposed of, can peel off the glass scattering prevention film even while dispensing with a great deal of labor.SOLUTION: The straight tube type fluorescent tube K with the glass scattering prevention film is fed along the axial direction by a chain feeder part 14 or a feed roller 15 and is irradiated, in the feeding process, with laser beams emitted from laser nozzles 18 arranged above and below the straight tube type fluorescent tube K in a peeling-off part 5 to cut the glass scattering prevention film F at the top and bottom thereof in striped states along the axial direction. Air is blown against the cut portions from a pair of vertical air blow nozzles 20 to peel off the glass scattering prevention film F. The peeled-off states of the glass scattering prevention film F are discriminated by a sensor head 22 of a vibration sensor arranged near the straight tube type fluorescent tube K and a color sensor 23 capable of discriminating the gloss of the straight tube type fluorescent tube K. The discriminated straight tube type fluorescent tubes K are sorted into film completely-peeled ones and film incompletely-peeled ones by a sorting means 6.
Abstract:
PROBLEM TO BE SOLVED: To provide a waste treatment device and a waste treatment method, which miniaturize a constitution of the device, in the waste treatment device which reduces a landfill disposal amount of soot, and melts the soot not including a reaction product of alkali chemical. SOLUTION: This waste treatment device 1 includes a gasification melting furnace 2 for thermally decomposing the waste and melting its residue, an alkali chemical supply device 3 supplying the alkali chemical into an exhaust gas from the gasification melting furnace 2, between the gasification melting furnace 2 and a dust collecting device 4 to produce a reaction product of an acid material included in the exhaust gas and the alkali chemical by the supply of alkali chemical, a classifying device 5 for classifying the soot included in the reaction product collected by the dust collecting device 4 into coarse soot and fine soot and separating the reaction product to a fine dust side, and a coarse dust returning means 6 for returning the coarse dust to the gasification melting furnace 2. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a separation apparatus and a separation method of waste quantitatively supplying waste to a specific gravity separator without using a large scale equipment like a supply hopper. SOLUTION: The separation apparatus separates waste by the difference of specific gravity by supplying the waste from a supply feeder 6 to the gravity separator 1. The separation apparatus includes: sensors 7, 8 detecting the presence/absence of waste disposed at an inlet part and an outlet part of the supply feeder 6, respectively; and a control device controlling on/off of the supply feeder 6 and specific gravity separator 1 using signals from the sensors, In the separation method of waste using the separation apparatus, after detecting the presence of waste at the inlet part of the supply feeder 6, the feeder is operated; after detecting the presence of waste at the outlet part of the supply feeder 6, the gravity separator 1 is operated; the supply feeder 6 is stopped at the same time of detecting the absence of waste at the outlet part of the supply feeder 6; and the specific gravity separator 1 is stopped after detecting absence of waste at the outlet part of the supply feeder 6. COPYRIGHT: (C)2010,JPO&INPIT