Method and device for producing molten iron
US6689182B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2001 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Oct 1, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D2009/0013
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method capable of suppressing damages to furnace wall refractories in a melting furnace and making the working life of them longer and a technique capable of obtaining a molten iron with homogenized composition while keeping a high productivity upon arc heating a pre-reducing iron in a melting furnace to obtain a molten iron, the method comprising supplying a pre-reducing iron to a stationary non-tilting type melting furnace and melting the iron by an arc heating mainly composed of radiation heating, the melting being performed while keeping a refractory wearing index RF represented by the following equation at 400 MWV/m2 or less.RF=P×E/L2(wherein RF represents the refractory wearing index (MWV/m2); P represents an arc power for one phase (MW); E represents an arc voltage (V); and L represents the shortest distance between the electrode side surface of a tip within an arc heating furnace and a furnace wall inner surface (m).)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.