초록 ▼

An electric melting furnace is provided for optimally melting and mixing a non-homogeneous material. The melting furnace includes a vessel having its top portion open to the environment. Three electrodes are supported above the furnace. Each of the electrodes includes a tip for insertion into the ma

An electric melting furnace is provided for optimally melting and mixing a non-homogeneous material. The melting furnace includes a vessel having its top portion open to the environment. Three electrodes are supported above the furnace. Each of the electrodes includes a tip for insertion into the material contained in the vessel. The vessel further includes an outlet formed in the bottom wall of the vessel to discharge the material after it has been melted and optimally mixed. Each of the three electrode tips has a generally round configuration. During the melting operation, the three electrode tips are laterally spaced from each other and are positioned in the vessel to be surrounded by molten material but above the bottom wall outlet. Optimum melting and then optimum mixing of the material occurs at selected horizontal spacings of the electrode tips and at selected electrode tip immersions in the molten material. The lateral spacing of the electrode tips and the immersion thereof depends upon a number of conditions including the width or diameter of the vessel, the magnitude of power applied to the electrodes, and the desired temperature of the molten material contained in the vessel.

대표청구항 ▼

An electric furnace for melting batch material and mixing molten material comprising: an open-topped vessel for containing molten material and unmelted, non-homogeneous batch on the surface of said molten material, said vessel having a bottom wall with an outlet formed therein for discharging said m

An electric furnace for melting batch material and mixing molten material comprising: an open-topped vessel for containing molten material and unmelted, non-homogeneous batch on the surface of said molten material, said vessel having a bottom wall with an outlet formed therein for discharging said molten material; at least three electrodes which are laterally spaced from each other, each of said electrodes having a tip that is immersed in said molten material for conducting electrical current therethrough, each of said electrode tips having a substantially round lateral cross section and each of said electrode tips being positioned above said bottom wall outlet; individual support arms which mount each of said electrodes, a plurality of elongated vertically extending frame members, vertical carriages supporting each of the support arms on said vertical frame members for movement therealong, first drive means for adjusting the position of each vertical carriage upon its vertical frame member, which drive means, in turn, adjusts the vertical positions of the electrode tips in the molten material; a plurality of horizontally extending frame members supporting the vertical frame members by means of horizontal carriages for movement along said horizontal frame members, second drive means for adjusting the horizontal position of each horizontal carriage, its vertical frame member, its support arm and its electrode tip along its horizontal frame member, said second drive means being separately and independently operable from said first drive means during furnace operation.