Csi is the concentration of particulate matter from exhaust stream “i”, g/dscm (gr/dscf)
Qsdi is the volumetric flow rate of effluent gas from exhaust stream “i”, dscm/hr (dscf/hr)
P is the average furnace power input, MW
K is the conversion factor, 1000 g/kg (7000 gr/lb)
NR 440.43(7)(c)2.2. Method 5 shall be used to determine the particulate matter concentration (Csi) and volumetric flow rate (Qsdi) of the effluent gas, except that the heating systems specified in sections 2.1.2 and 2.1.6 of Method 5 are not to be used when the carbon monoxide content of the gas stream exceeds 10% by volume, dry basis. If a flare is used to comply with sub. (4), the sampling site shall be upstream of the flare. The sampling time shall include an integral number of furnace cycles.
NR 440.43(7)(c)2.a.a. When sampling emissions from open electric submerged arc furnaces with wet scrubber control devices, sealed electric submerged arc furnaces or semienclosed electric arc furnaces, the sampling time and sample volume for each run shall be at least 60 minutes and 1.80 dscm (63.6 dscf).
NR 440.43(7)(c)2.b.b. When sampling emissions from other types of installations, the sampling time and sample volume for each run shall be at least 200 minutes and 5.66 dscm (200 dscf).
NR 440.43(7)(c)3.3. The measurement device of sub. (6) (b) shall be used to determine the average furnace power input (P) during each run.
NR 440.43(7)(c)4.4. Method 9 and the procedures in s. NR 440.11 shall be used to determine opacity.
NR 440.43(7)(c)5.5. The emission rate correction factor, integrated sampling procedures of Method 3B shall be used to determine the CO concentration. The sample shall be taken simultaneously with each particulate matter sample.
NR 440.43(7)(d)(d) During the particulate matter run, the maximum open hood area, in hoods with segmented or otherwise moveable sides, under which the process is expected to be operated and remain in compliance with all standards shall be recorded. Any future operation of the hooding system with open areas in excess of the maximum is not permitted.
NR 440.43(7)(e)(e) To comply with sub. (6) (d) or (f), the owner or operator shall use the monitoring devices in sub. (6) (c) or (e) to make the required measurements as determined during the performance test.
NR 440.43 HistoryHistory: Cr. Register, January, 1984, No. 337, eff. 2-1-84; am. (2) (intro.), Register, September, 1990, No. 417, eff. 10-1-90; r. and recr. (7), Register, July, 1993, No. 451, eff. 8-1-93; CR 06-109: am. (2) (c), (i), (k), (o), (q), (t) and (v) and (7) (c) 1. and 2. b. Register May 2008 No. 629, eff. 6-1-08.
NR 440.44NR 440.44Steel plants: electric arc furnaces constructed after October 21, 1974, and on or before August 17, 1983.
NR 440.44(1)(1)Applicability and designation of affected facility.
NR 440.44(1)(a)(a) The provisions of this section are applicable to the following affected facilities in steel plants that produce carbon, alloy, or specialty steels: electric arc furnaces and dust-handling systems.
NR 440.44(1)(b)(b) The provisions of this section apply to each affected facility identified under par. (a) that commenced construction, modification, or reconstruction after October 21, 1974 and on or before August 17, 1983.
NR 440.44(2)(2)Definitions. As used in this section, terms not defined in this subsection have the meanings given in s. NR 440.02.
NR 440.44(2)(a)(a) “Bag leak detection system” means a system that is capable of continuously monitoring relative particulate matter (dust) loadings in the exhaust of a baghouse to detect bag leaks and other conditions that result in increases in particulate loadings. A bag leak detection system includes an instrument that operates on triboelectric, electrodynamic, light scattering, light transmittance, or other effect to continuously monitor relative particulate matter loadings.
NR 440.44(2)(am)(am) “Capture system” means the equipment (including ducts, hoods, fans, dampers, etc.) used to capture or transport particulate matter generated by an EAF to the air pollution control device.
NR 440.44(2)(b)(b) “Charge” means the addition of iron and steel scrap or other materials into the top of an electric arc furnace.
NR 440.44(2)(c)(c) “Charging period” means the time period commencing at the moment an EAF starts to open and ending either 3 minutes after the EAF roof is returned to its closed position or 6 minutes after commencement of opening of the roof, whichever is longer.
NR 440.44(2)(d)(d) “Control device” means the air pollution control equipment used to remove particulate matter generated by one or more EAFs from the effluent gas stream.
NR 440.44(2)(e)(e) “Direct shell evacuation control system” or “DEC system” means any system that maintains a negative pressure within the EAF above the slag or metal and ducts these emissions to the control device.
NR 440.44(2)(f)(f) “Dust-handling equipment” means any equipment used to handle particulate matter collected by the control device and located at or near the control device for an EAF subject to this section.
NR 440.44(2)(g)(g) “Electric arc furnace” or “EAF” means any furnace that produces molten steel and heats the charge materials with electric arcs from carbon electrodes. Furnaces that continuously feed direct-reduced iron ore pellets as the primary source of iron are not affected facilities within the scope of this definition.
NR 440.44(2)(h)(h) “Heat time” means the period commencing when scrap is charged to an empty EAF and terminating when the EAF tap is completed.
NR 440.44(2)(i)(i) “Meltdown and refining” means that phase of the steel production cycle when charge material is melted and undesirable elements are removed from the metal.
NR 440.44(2)(j)(j) “Meltdown and refining period” means the time period commencing at the termination of the initial charging period and ending at the initiation of the tapping period, excluding any intermediate charging periods and times when power to the EAF is off.