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One type of magnetic powder production method from heavy metal sludge consists of: 1. after drying the heavy metal sludge, adding some proper quantum of Fe compound, then mixing it evenly; 2. putting the compound in blast furnace in which ambiance can becontrolled, heating at temperature range 600-1300 centigrade in 1-10 hours, then cooling it down to 200 centigrade and getting it out. Theambiance in the blast furnace can be one of vacuum, N gas, inertia gasor reaction gas. 3. grinding the powder after the high temperature process with ball grindingmachine, then lead into the magnetism choosing machine to separate itsmagnetism. 4. recycling the non magnetic material to be reused as ingredient,separating the magnetism of magnetic solid again, then dehydrating itto magnetic powder.
TW80102737A1991-04-101991-04-10Magnetic powder production
TW222252B
(en)