[Code of Federal Regulations]
[Title 40, Volume 26]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR420.41]

[Page 405]
 
                TITLE 40-PROTECTION OF ENVIRONMENT
 
      CHAPTER I-ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 420-IRON AND STEEL MANUFACTURING POINT SOURCE CATEGORY--Table of Contents
 
                Subpart D-Steelmaking Subcategory
 
Sec. 420.41  Specialized definitions.

    (a) The term basic oxygen furnace steelmaking means the production 
of steel from molten iron, steel scrap, fluxes, and various combinations 
thereof, in refractory lined furnaces by adding oxygen.
    (b) [Reserved]
    (c) The term electric arc furnace steelmaking means the production 
of steel principally from steel scrap and fluxes in refractory lined 
furnaces by passing an electric current through the scrap or steel bath.
    (d) The term wet means those steelmaking air cleaning systems that 
primarily use water for furnace gas cleaning.
    (e) The term semi-wet means those steelmaking air cleaning systems 
that use water for the sole purpose of conditioning the temperature and 
humidity of furnace gases such that the gases may be cleaned in dry air 
pollution control systems.
    (f) The term open combustion means those basic oxygen furnace 
steelmaking wet air cleaning systems which are designed to allow excess 
air to enter the air pollution control system for the purpose of 
combusting the carbon monoxide in furnace gases.
    (g) The term suppressed combustion means those basic oxygen furnace 
steelmaking wet air cleaning systems which are designed to limit or 
suppress the combustion of carbon monoxide in furnace gases by 
restricting the amount of excess air entering the air pollution control 
system.

[47 FR 23284, May 27, 1982, as amended at 67 FR 64267, Oct. 17, 2002]