Furnace for melting highly corrosive slag
US3973076A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1974 |
| Grant date | Aug 3, 1976 |
| Priority date | — |
| Expiry date | Nov 27, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D2001/005
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A carbon brick/graphite lined furnace for melting, containing and pouring a special purpose slag composed of about 40 percent CaF.sub.2, 30 percent CaO and 30 percent Al.sub.2 O.sub.3 or a slag composed of about 70 percent CaF.sub.2 and 30 percent Al.sub.2 O.sub.3 which has a cylindrical configuration and a roof composed of high alumina ram refractory with openings therein for receiving heating electrodes composed of graphite, for feeding dry slag into the furnace and for exhausting fumes therefrom. The furnace has a pouring spout and the roof can be raised whereby the furnace is turnable about trunions for discharging the molten slag into an electroslag remelting process mold. Both the interior lining and the next surrounding lining are composed of graphite or carbon bricks or a combination thereof. An expansion layer of insulating material, powder alumina, surrounds the second lining. Following this are two further linings of refractory material. A steel shell is provided with a layer of compressed material of high temperature insulation packed between such shell and the last layer of refractory brick. On the bottom of the furnace, two successive circular shaped graphite discs or…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.