ADJUSTMENT OF FLOW RATE OF HIGH-TEMPERATURE MELT

摘要

PURPOSE:To make it possible to keep the amount of a discharged melt at a constant value, by keeping melt in a smelting furnace at a given temperature and tilting the furnace body by a minute angle for a given time based on the actual measured value to carry out the discharge. CONSTITUTION:A high-temperature molten slag is directly carried to an electric furnace 1 by a pan cart 2 and intermittently charged into the furnace 1 by given portions and a component adjusting material is added from a conduit 15. The melt is kept within the temperature range of the target temperature + or -20 deg.C and continuously fed from a nozzle 4 into a fiber making machine 5 at a constant rate to produce rock wool. In the process, the electric furnace 1 is tilted stepwise (or continuously) by a predetermined minute angle for a given time according to the gradually changing amount of the melt in the electric furnace 1 to keep the amount of discharge at a constant value. The electric furnace 1 is tilted by hydraulic cylinders 11 and pistons 12 in combination and a constant rate pump 17 feeds a given amount of oil through a feed line 18 to the hydraulic cylinders 11 on signals from a timer 16 at a given time interval to lift the pistons 12 to a specified height and tilt the electric furnace 1 by a given angle.