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Electric furnace with insulated electrode and process for producing molten metals

A process method and electrode technology, which are used in electric furnaces, electric furnace heating, ohmic resistance electrodes, etc.

Inactive Publication Date: 2000-04-26
ALABAMA POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is that it includes a water-cooled, fixed, non-consumable barrier between the electrodes and the charge

Method used

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  • Electric furnace with insulated electrode and process for producing molten metals
  • Electric furnace with insulated electrode and process for producing molten metals
  • Electric furnace with insulated electrode and process for producing molten metals

Examples

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example 1

[0111] A computer simulation operation consisted of a feed mixture containing 2000 lbs of scrap iron, 100 lbs of wood chips, 85 lbs of coal, 20 lbs of coke and 75 lbs quartzite. The planned input power of the electric furnace is 50,000 kilowatts. The simulated scrap feed consisted of the following: 40% shredded automotive steel; 15% remelt; 15% #1 steel scrap; 20% cast iron filings; 5% tin plate / can; . The feed mixture has a calculated alloy composition with balance iron: 2.5% silicon; 3.85% carbon; 0.40% manganese; 0.10% chromium; 0.15% nickel; 0.15% copper; 0.01% sulfur; 0.05% phosphorous Matter; 0.03% tin, here, each percentage is by weight.

[0112] The planned synthetic iron product exiting the furnace had the following composition with balancing impurities: 92.5% iron content; 3.85% carbon content; 2.50% silicon content by weight. The calculated energy consumption is 650 kWh per ton of ferroalloy.

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PUM

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Abstract

An electric arc furnace (10) having a partially insulated electrode (37) produces molten metal (28) such as foundry iron from an iron source where little or no slag (30) is produced. The furnace (10) includes at least one insulated electrode (37) for immersing deep into the metal charge (26). An insulating coating can be a fibrous mat (48) wrapped around the electrode or a spray coating (72). In one embodiment, the electrode (156) has a coupling (172) at a first end (176) for coupling with an electrically conducting member (142) and a coupling (172) at the second end (178) for coupling with an adjacent electrode to form an electrode column. The coupling members (172) can be an internally threaded recess (166, 168) in the ends thereof. An externally threaded coupling member (172) can be threaded into the recesses (166, 168) of the electrodes (157) for coupling two or more electrodes (157) together.

Description

field of invention [0001] The invention relates to an insulated electrode, an electric furnace with an insulated electrode and a process for producing molten metal (including cast iron) using the insulated electrode. More specifically, the present invention is directed to insulated electrodes which are surrounded by an insulating material which is attached to various parts of the electrode. Background of the invention [0002] In the metal industry, metals, such as cast iron, are produced by many different process methods for foundry and steelmaking. A process for producing cast iron utilizes a standard cupola furnace. Various iron raw materials are filled into the shaft of the cupola, which is fueled by burning coke with a puff of air. The charge charged to the furnace generally contains many additives such as high-silicon cast iron to increase the silicon content of the iron, and slag forming materials such as limestone to remove impurities such as sulfur. [0003] The ...

Claims

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Application Information

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IPC IPC(8): H05B7/06C21B11/10C21B13/12C21C1/08C21C5/52F27B3/08H05B7/07H05B7/102H05B7/107H05B7/14H05B7/18
CPCH05B7/102H05B7/14C21B11/10C21B13/12C21C5/52C21C1/08H05B7/07H05B7/107Y02P10/20Y02P10/25
Inventor 查尔斯·F·汉得里克斯
Owner ALABAMA POWER
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