Tenn. Comp. R. & Regs. 1200-03-16-.14 - IRON AND STEEL PLANTS

(1) Applicability. The provisions of this rule shall apply to each basic oxygen process furnace commenced on or after April 21, 1976.
(2) Definitions
(a) "Basic oxygen process furnace" (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 oxygen-rich gas. Open hearth, blast, and reverberatory furnaces are not included in this definition.
(b) "Primary emissions" means particulate matter emissions from the BOPF generated during the steel production cycle and captured by the BOPF primary control system.
(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.
(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 November 6, 1988. For an affected facility constructed, modified, or reconstructed after April 21, 1976, but on or before November 6, l988, "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.
(3) Standard for particulate matter
(a) Except as provided under subparagraph (b) of this paragraph, on and after the date on which the performance test required to be conducted by paragraph 1200-3-16-.01(5) is completed, no owner or operator subject to the provisions of this rule shall discharge or cause the discharge into the atmosphere from any affected facility any gases which:
1. Contain particulate matter in excess of 50 mg/dscm (0.022 gr/dscf).
2. Exit from a control device and exhibit 10 percent opacity or greater, except that an opacity of greater than 10 percent but less than 20 percent many occur once per steel production cycle.
(b) For affected facilities constructed, modified, or reconstructed after November 6, 1988, the following limits shall apply:
1. On or after the date on which the performance test under paragraph 1200-3-16 - .01(5) is required to be completed, no owner or operator of an affected facility for which open hooding is the method for controlling primary emissions shall cause to be discharged to the atmosphere any gases that:
(i) Contain particulate matter in excess of 50 mg/dscm (0.022 gr/dscf), as measured for the primary oxygen blow.
(ii) Exit from a control device not used solely for the collection of secondary emissions, as defined in paragraph (2) of rule 1200-3-16-.55, and exhibit 10 percent opacity or greater, except that an opacity greater than 10 percent but less than 20 percent may occur once per steel production cycle.
2. On or after the date on which the performance test required by 1200-3-16-.01(5) is completed, no owner or operator of an affected facility for which closed hooding is the method for controlling primary emissions shall cause to be discharged into the atmosphere any gases that:
(i) Contain particulate matter in excess of 68 mg/dscm (0.030 gr/dscf), as measured for the primary oxygen blow.
(ii) Exit from a control device not used solely for the collection of secondary emissions, as defined in paragraph (2) of rule 1200-3-16-.55, and exhibit 10 percent opacity or greater, except that an opacity greater than 10 percent but less than 20 percent may occur once per steel production cycle.
(c) On and after the date on which the performance test required by 1200-3-16-.01(5) is completed, each owner or operator of an affected facility subject to subparagraph (b) of this paragraph shall operate the primary gas cleaning system during any reblow in a manner identical to operation during the primary oxygen blow.
(4) Monitoring of operations.
(a) The owner or operator of an affected facility shall maintain a single time-measuring instrument which shall be used in recording daily the time and duration of each steel production cycle, and the time and duration of any diversion of exhaust gases from the main stack servicing the BOPF.
(b) The owner or operator of any affected facility that uses venturi scrubber emission control equipment shall install, calibrate, maintain, and continuously operate monitoring devices as follows:
1. A monitoring device for the continuous measurement of the pressure loss through the venturi constriction of the control equipment. The monitoring device is to be certified by the manufacturer to be accurate within ±; 250 Pa (± 1 inch water).
2. A monitoring device for the continual measurement of the water supply pressure to the control equipment. The monitoring device is to be certified by the manufacturer to be accurate within ± 5 percent of the design water supply pressure. The monitoring device's pressure sensor or pressure tap must be located close to the water discharge point. The Technical Secretary must be consulted for approval in advance of selecting alternative locations for the pressure sensor or tap.
3. All monitoring devices shall be synchronized each day with the time measuring instrument used under subparagraph (a) of this paragraph. The chart recorder error directly after synchronization shall not exceed 0.08 cm (1/32 inch).
4. All monitoring devices shall use chart recorders which are operated at a minimum chart speed of 3.8 cm/hr (1.5 in/hr).
5. All monitoring devices are to be recalibrated annually, and at other times as the Technical Secretary may require, in accordance with the procedures under part .01 (8) (b) 3. of this chapter.
(c) Any owner or operator subject to the requirements of subparagraph (b) of this paragraph shall report to the Technical Secretary, on a semiannual basis, all measurements over any 3-hour period that average more than 10 percent below the average levels maintained during the most recent performance test conducted under paragraph 1200-3-16-.01(5) in which the affected facility demonstrated compliance with the mass standards under 1200-3-16-.14(3)(a) 1, (b)1.(i) or (b)2.(i). The accuracy of the respective measurements, not to exceed the values specified in parts (b)1. and (b)2. of this paragraph, may be taken into consideration when determining the measurement results that must be reported.
(5) Test Methods and Procedures
(a) For determining the concentration of particulate matter and associated moisture content, the sampling for each run shall continue for an integral number of cycles with total duration of at least sixty (60) minutes. The sampling rate shall be at least 0.9 dscm/hr (0.53 dscf/min) except that shorter sampling times, when necessitated by process variables or other factors, may be approved by the Technical Secretary. A cycle shall start at the beginning of either the scrap preheat or the oxygen blow and shall terminate immediately prior to tapping.
(b) For Method 5, the sampling time shall be as follows:
1. For affected facilities that commenced construction, modification, or reconstruction on or before November 6, l988, the sampling for each run shall continue for an integral number of steel production cycles with total duration of at least 60 minutes. A cycle shall start at the beginning of either the scrap preheat or the oxygen blow and shall terminate immediately prior to tapping. The minimum sample volume shall be at least 1.5 dscm (53 dscf). Shorter sampling times and smaller sample volumes, when necessitated by process variables or other factors, may be approved by the Technical Secretary.
2. For affected facilities that commence construction, modification, or reconstruction after November 6, l988, the sampling for each run shall continue for an integral number of primary oxygen blows, with total duration of at least 60 minutes. The minimum sample volume shall be at least 1.5 dscm (53 dscf). Shorter sampling times and smaller sample volumes, when necessitated by process variables or other factors, may be approved by the Technical Secretary.
(c) Sampling of flue gases during each steel production cycle shall be discontinued whenever all flue gases are diverted from the stack and shall be resumed after each diversion period.

Notes

Tenn. Comp. R. & Regs. 1200-03-16-.14
Original rule filed January 10, 1977; effective February 9, 1977. Amendment filed May 17, 1978; effective June 16, 1978. Amendment filed January 31, 1983; effective March 2, 1983. Amendment filed September 21, 1988; effective November 6, 1988.

Authority: T.C.A. §§ 68-25-105 and 4-5-202.

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