NR 440.30(2)(b)(b) “Brass or bronze” means any metal alloy containing copper as its predominant constituent, and lesser amounts of zinc, tin, lead or other metals.
NR 440.30(2)(c)(c) “Electric furnace” means any furnace which uses electricity to produce over 50% of the heat required in the production of refined brass or bronze.
NR 440.30(2)(d)(d) “Reverberatory furnace” includes the following types of reverberatory furnaces: stationary, rotating, rocking and tilting.
NR 440.30(3)(3)Standard for particulate matter.
NR 440.30(3)(a)(a) On and after the date on which the performance test required to be conducted by s. NR 440.08 is completed, no owner or operator subject to the provisions of this section may discharge or cause the discharge into the atmosphere from a reverberatory furnace any gases which:
NR 440.30(3)(a)1.1. Contain particulate matter in excess of 50 mg/dscm (0.022 gr/dscf).
NR 440.30(3)(a)2.2. Exhibit 20% opacity or greater.
NR 440.30(3)(b)(b) On and after the date on which the performance test required to be conducted by s. NR 440.08 is completed, no owner or operator subject to the provisions of this section may discharge or cause the discharge into the atmosphere from any blast (cupola) or electric furnace any gases which exhibit 10% opacity or greater.
NR 440.30(4)(4)Test methods and procedures.
NR 440.30(4)(a)(a) In conducting performance tests required in s. NR 440.08, the owner or operator shall use as reference methods and procedures the test methods in Appendix A of 40 CFR part 60, incorporated by reference in s. NR 440.17, or other methods and procedures as specified in this subsection, except as provided in s. NR 440.08 (2).
NR 440.30(4)(b)(b) The owner or operator shall determine compliance with the particulate matter standards in sub. (3) as follows:
NR 440.30(4)(b)1.1. Method 5 shall be used to determine the particulate matter concentration during representative periods of charging and refining, but not during the pouring part of the production cycle. The sampling time and sample volume for each run shall be at least 120 minutes and 1.80 dscm (63.6 dscf).
NR 440.30(4)(b)2.2. Method 9 and the procedures in s. NR 440.11 shall be used to determine opacity.
NR 440.30 HistoryHistory: Cr. Register, January, 1984, No. 337, eff. 2-1-84; am. (1) (a), (4) (a) 3. and 4., cr. (4) (a) 5., Register, September, 1986, No. 369, eff. 10-1-86; am. (2) (intro)., Register, September, 1990, No. 417, eff. 10-1-90; r. and recr. (4), Register, July, 1993, No. 451, eff. 8-1-93; CR 06-109: am. (4) (b) 1. Register May 2008 No. 629, eff. 6-1-08.
NR 440.31NR 440.31Primary emissions from basic oxygen process furnaces for which construction is commenced after June 11, 1973.
NR 440.31(1)(1)Applicability and designation of affected facility.
NR 440.31(1)(a)(a) The affected facility to which the provisions of this section apply is each basic oxygen process furnace.
NR 440.31(1)(b)(b) Any facility under par. (a) that commences construction or modification after June 11, 1973, is subject to the requirements of this section.
NR 440.31(2)(2)Definitions. As used in this section, terms not defined in this subsection have the meanings given in s. NR 440.02.
NR 440.31(2)(a)(a) “Basic oxygen process furnace” or “BOPF” means any furnace with a refractory lining in which molten steel is produced by charging scrap metal, molten iron, and flux materials or alloy additions into a vessel and introducing a high volume of an oxygen-rich gas. Open hearth, blast and reverberatory furnaces are not included in this definition.
NR 440.31(2)(b)(b) “Primary emissions” means particulate matter emissions from the BOPF generated during the steel production cycle and captured by the BOPF primary control system.
NR 440.31(2)(c)(c) “Primary oxygen blow” means the period in the steel production cycle of a BOPF during which a high volume of oxygen-rich gas is introduced to the bath of molten iron by means of a lance inserted from the top of the vessel or through tuyeres in the bottom or through the bottom and sides of the vessel. This definition does not include any additional or secondary oxygen blows made after the primary blow or the introduction of nitrogen or other inert gas through tuyeres in the bottom or bottom and sides of the vessel.
NR 440.31(2)(d)(d) “Steel production cycle” means the operations conducted within the BOPF steelmaking facility that are required to produce each batch of steel and includes the following operations: scrap charging, preheating (when used), hot metal charging, primary oxygen blowing, sampling (vessel turndown and turnup), additional oxygen blowing (when used), tapping, and deslagging. This definition applies to an affected facility constructed, modified, or reconstructed after January 20, 1983. For an affected facility constructed, modified, or reconstructed after June 11, 1973, but on or before January 20, 1983, “steel production cycle” means the operations conducted within the BOPF steelmaking facility that are required to produce each batch of steel and includes the following operations: scrap charging, preheating (when used), hot metal charging, primary oxygen blowing, sampling (vessel turndown and turnup), additional oxygen blowing (when used) and tapping.
NR 440.31(3)(3)Standard for particulate matter.
NR 440.31(3)(a)(a) Except as provided under par. (b), on and after the date on which the performance test required to be conducted by s. NR 440.08 is completed, no owner or operator subject to the provisions of this section may discharge or cause the discharge into the atmosphere from any affected facility any gases which:
NR 440.31(3)(a)1.1. Contain particulate matter in excess of 50 mg/dscm (0.022 gr/dscf).
NR 440.31(3)(a)2.2. Exit from a control device and exhibit 10% opacity or greater, except that an opacity of greater than 10% but less than 20% may occur once per steel production cycle.
NR 440.31(3)(b)(b) For affected facilities constructed, modified, or reconstructed after January 20, 1983, the following limits shall apply:
NR 440.31(3)(b)1.1. On or after the date on which the performance test under s. NR 440.08 is required to be completed, no owner or operator of an affected facility for which open hooding is the method for controlling primary emissions may cause to be discharged to the atmosphere any gases that: