| 摘要 |
PURPOSE:To vitrify and grind magnetic glass which is difficult to vitrify, uniformly by providing jet water flow that crosses the flow passage of the magnetic glass whic is held in a low viscosity state, and admitting the magntic glass into the jet water flow thereby grinding and vitrifying the same. CONSTITUTION:Magnetic glass 2 having compsn. of Fe2O3-BaO-B2O3 is contained in a platinum crucible 1 or a vessel consisiting of refractories, and is melted to high temps. of 1,350-1,500 deg.C by an electric furnace 3. The molten magnetic glass flows out through an outflow hole 5 punched in the bottom part of a platinum crucible 1. The flow 6 of the magnetic glass flowing out from thefurnace is maintained in the state of high temp. and low viscosity and cold water having >=5kg/cm<2> pressure at ordinary temp. or below is injected from a nozzle 7 so as to cross the flow passage thereof, whereby jet water flow 8 is formed. The magnetic glass admitted into the flow 8 is grounded to pieces and is cooled quickly simultaneously, whereby the glass is vitrified. The grounded glass is contained together with the water in a hopper 9 serving also as a capturing vessel, and is conveyed to the next stage by a conveyor 10. |
