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Title: Refractory electrodes for joule heating and methods of using same

Abstract

A certain group of electrically conductive refractory materials presently known for use in high temperature applications as throat constructions, melter sidewalls, forehearth, stacks, port sills, hot face lining for slagging coal gasifiers, slag runners, and linings for nuclear waste encapsulation furnaces may be used as electrodes permitting joule heating at temperatures in excess of 1200 C. in excess of about 4400 hours even in the presence of transition group element(s). More specifically, the invention is an electrode for melting earthen materials, wherein the electrode is made from an electrically conductive refractory material, specifically at least one metal oxide wherein the metal is selected from the group consisting of chrome, ruthenium, rhodium, tin and combinations thereof.

Inventors:
 [1];  [2];  [3]
  1. (West Richland, WA)
  2. (Richland, WA)
  3. (Kennewick, WA)
Issue Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA
OSTI Identifier:
871536
Patent Number(s):
5749932
Assignee:
Battelle Memorial Institute (Richland, WA) PNNL
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
refractory; electrodes; joule; heating; methods; electrically; conductive; materials; presently; temperature; applications; throat; constructions; melter; sidewalls; forehearth; stacks; sills; hot; lining; slagging; coal; gasifiers; slag; runners; linings; nuclear; waste; encapsulation; furnaces; permitting; temperatures; excess; 1200; 4400; hours; presence; transition; element; specifically; electrode; melting; earthen; material; metal; oxide; selected; consisting; chrome; ruthenium; rhodium; combinations; refractory materials; conductive refractory; temperature applications; coal gasifier; refractory material; metal oxide; electrically conductive; nuclear waste; earthen material; coal gas; joule heating; temperature application; /65/373/501/588/

Citation Formats

Lamar, David A., Chapman, Chris C., and Elliott, Michael L. Refractory electrodes for joule heating and methods of using same. United States: N. p., 1998. Web.
Lamar, David A., Chapman, Chris C., & Elliott, Michael L. Refractory electrodes for joule heating and methods of using same. United States.
Lamar, David A., Chapman, Chris C., and Elliott, Michael L. Thu . "Refractory electrodes for joule heating and methods of using same". United States. https://www.osti.gov/servlets/purl/871536.
@article{osti_871536,
title = {Refractory electrodes for joule heating and methods of using same},
author = {Lamar, David A. and Chapman, Chris C. and Elliott, Michael L.},
abstractNote = {A certain group of electrically conductive refractory materials presently known for use in high temperature applications as throat constructions, melter sidewalls, forehearth, stacks, port sills, hot face lining for slagging coal gasifiers, slag runners, and linings for nuclear waste encapsulation furnaces may be used as electrodes permitting joule heating at temperatures in excess of 1200 C. in excess of about 4400 hours even in the presence of transition group element(s). More specifically, the invention is an electrode for melting earthen materials, wherein the electrode is made from an electrically conductive refractory material, specifically at least one metal oxide wherein the metal is selected from the group consisting of chrome, ruthenium, rhodium, tin and combinations thereof.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

Patent:

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