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2.C.1 - Iron & Steel Production
Short description
Source category NFR 2.C.1 - Iron & Steel Production comprises process-related emissions from oxygen steel and electric-steel production.
Category Code | Method | AD | EF | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2.C.1 | T2 | NS | CS | ||||||||||||
Key Category | SO₂ | NOₓ | NH₃ | NMVOC | CO | BC | Pb | Hg | Cd | Diox | PAH | HCB | TSP | PM₁₀ | PM₂ ₅ |
2.C.1 | L/- | - | - | - | L/- | - | L/T | L/T | L/T | L/T | - | - | L/T | L/T | L/T |
In 2019 a total of 27.7 million t of raw steel was produced in six integrated steelworks. Electrical steel production amounted to another 11.9 million t.
Other structural elements are sinter production, hot iron production, hot rolling, iron and steel foundries (including malleable casting). The last Siemens-Martin steel works (Stahlwerk Brandenburg) was shut down shortly after 1990; the last Thomas steel works (Maxhütte Sulzbach-Rosenberg) discontinued its production in 2002. Due to their minor relevance and the phasing out, the emissions from Siemens-Martin and Thomas steel production are jointly calculated with the emissions from oxygen steel production.
Energy-related emissions from steel production for the years 1990 - 1994 (for individual pollutants until 1999) are reported under 1.A.2.a.
Method
Activity data
Activity data are is collected from plant operators by national institutions. After discontinuation of the special public statistics for iron and steel production (FS. 4, R. 8.1), the information is collected by the German steel trade association Wirtschaftsvereinigung Stahl (WV Stahl) based on a formal agreement.
As the activity rates for 2017 could not be provided by WV Stahl as a result of compliance issues, aggregated figures from emissions trading were used instead. The consistency of emissions trading data has been verified against comparative figures for previous years. The deviations were less than 1%, only in sinter production they are noticeably higher (maximum + 8%).
In the iron and steel industry, only minor amounts of secondary fuels are used for pig iron production in individual blast furnaces. They are used as substitute reducing agents, instead of coke and coal. To date, these materials have not yet been included in the national statistics and in the Energy Balance. For this reason, the data used is also provided by the steel trade association (WV Stahl).
Emission factors
The emission factors used for emissions calculation are based on emission data from individual plants, either determined by the Umweltbundesamt (UBA) itself (emission factors for 1995 - 2001) or by a research project (emission factors for 2008 and later).
As the EF for the years 1995 - 2001 as well as for 2008 are based on real stack emission data, it is not possible to distinguish between combustion and process emissions (they are emitted via the same stacks). Hence whereever plant-based EF were availaible, i.e. for most pollutants for the years 1995 and later, all emissions are reported under 2.C.1.
Please note that the reported emissions also cover diffuse emissions from sources that are not covered in the EMEP/EEA Guidebook. For many pollutants and sources, individual EFs for channelled as well as diffuse emissions have been determined. While there is sufficient knowledge and measurement data of channelled emissions, the emission data concerning diffuse sources is usually based on estimations, using parameters adapted to the local conditions of the individual emission source. Therefore, emission data for one source of diffuse emissions is hardly significant for the diffuse emissions from other plants. The emission factors given below were calculated as the weighted average of pollution loads reported for individual diffuse sources by the plant operators, in relation to their corresponding production amounts.
Table 1: Overview of applied emission factors applied for sinter production
pollutant | Type of source | EF 1990 | EF 1995 | EF 2000 | EF 2005 | EF 2010 | EF 2016 | unit |
---|---|---|---|---|---|---|---|---|
Cd | 0.098 | 0.052 | 0.017 | g/t | ||||
CO | 19.152 | 17.325 | 15.497 | 14.4 | kg/t | |||
Cr | 0.077 | 0.044 | 0.02 | g/t | ||||
HCB | 0.03 | mg/t | ||||||
Hg | 0.059 | 0.028 | 0.005 | g/t | ||||
Ni | 0.139 | 0.068 | 0.015 | g/t | ||||
NMVOC | 0.12 | kg/t | ||||||
NOx | IE1) | 0.558 | 0.46 | 0.401 | kg/t | |||
PAH | 320.00 | 248.571 | 177.143 | 120 | ||||
Pb | 5.299 | 3.242 | 1.7 | g/t | ||||
PCB | 3.0 | 2.285714 | 1.571429 | 1 | mg/t | |||
PCDD/F | 6.0 | 4.575 | 3.149 | 1.724 | 0.796 | 0.578 | µg/t | |
SO2 | IE2) | 1.08 | 0.837 | 0.691 | kg/t | |||
TSP | channelled | 0.65 | 0.465 | 0.234 | 0.096 | kg/t | ||
TSP | diffuse | 0.046 | kg/t | |||||
PM10 | channelled | 0.445 | 0.336 | 0.177 | 0.07 | kg/t | ||
PM10 | diffuse | 0.016 | kg/t | |||||
PM2.5 | channelled | 0.214 | 0.206 | 0.13 | 0.056 | kg/t |
Table 2: Overview of applied emission factors applied for pig iron production
pollutant | Type of source | EF 1995 | EF 2000 | EF 2005 | EF 2010 | EF 2016 | unit |
---|---|---|---|---|---|---|---|
B(a)P | 0.05 | mg/t | |||||
Cd | channelled | 0.004 | g/t | ||||
Cd | diffuse | 0.000203 | g/t | ||||
CO | channelled | 1.18 | 0.915 | 0.65 | 0.491 | 0.491 | kg/t |
CO | diffuse | 0.398 | kg/t | ||||
Cr | channelled | 0.019 | 0.006 | 0.002 | 0.001 | 0.001 | g/t |
Cr | diffuse | 0.008 | g/t | ||||
Hg | channelled | 0.002436 | 0.000192 | 0.000015 | 0.000003 | 0.000003 | g/t |
Hg | diffuse | 0.005 | mg/t | ||||
Ni | channelled | 0.021 | 0.006 | 0.002 | 0.001 | 0.001 | g/t |
Ni | diffuse | 0.008 | g/t | ||||
NMVOC | 0.018525 | kg/t | |||||
NOx | channelled | 0.051938 | 0.051938 | 0.051938 | 0.0517 | 0.0517 | kg/t |
NOx | diffuse | 0.001 | g/t | ||||
Pb | channelled | 0.022 | kg/t | ||||
Pb | diffuse | 0.011 | g/t | ||||
PCDD/F | 0.026 | 0.009 | 0.004 | 0.004 | 0.004 | µg/t | |
SO2 | channelled | 0.242 | g/t | ||||
SO2 | diffuse | 0.04 | kg/t | ||||
TSP | channelled | 0.022 | 0.015 | 0.01 | 0.008 | 0.008 | kg/t |
TSP | diffuse | 0.016 | g/t | ||||
PM10 | channelled | 0.013 | 0.009 | 0.006 | 0.006 | 0.006 | kg/t |
PM10 | diffuse | 0.007 | kg/t | ||||
PM2.5 | channelled | 0.009 | 0.007 | 0.005 | 0.004 | 0.004 | kg/t |
Table 3: Overview of applied emission factors applied for oxygen steel production
pollutant | Type of source | EF 1995 | EF 2000 | EF 2005 | EF 2010 | EF 2016 | unit |
---|---|---|---|---|---|---|---|
Cd | 0.053 | 0.038 | 0.024 | 0.016 | 0.016 | g/t | |
CO | 11.500 | 11.077 | 10.654 | 10.400 | 10.400 | kg/t | |
Cr | channelled | 0.715 | 0.306 | 0.125 | 0.028 | 0.028 | g/t |
Cr | diffuse | 0.069 | g/t | ||||
Ni | channelled | 0.090 | 0.060 | 0.030 | 0.006 | 0.006 | g/t |
Ni | diffuse | 0.004 | g/t | ||||
NOx | channelled | 0.006 | 0.005 | 0.005 | 0.004 | 0.004 | kg/t |
NOx | diffuse | 0.0037 | kg/t | ||||
PAH | 0.100 | mg/t | |||||
Pb | channelled | 2.941 | 1.883 | 0.824 | 0.189 | 0.189 | g/t |
Pb | diffuse | 0.278 | g/t | ||||
PCB | 2.670 | 1.740 | 1 | 1 | 1 | mg/t | |
PCDD/F | 0.070 | 0.070 | 0.070 | 0.069 | 0.069 | µg/t | |
SO2 | diffuse | 0.001 | kg/t | ||||
TSP | channelled | 0.155 | 0.145 | 0.145 | 0.024 | 0.024 | kg/t |
TSP | diffuse | 0.049 | kg/t | ||||
PM10 | channelled | 0.099 | 0.093 | 0.093 | 0.020 | 0.020 | kg/t |
PM10 | diffuse | 0.019 | kg/t | ||||
PM2.5 | channelled | 0.025 | 0.023 | 0.023 | 0.017 | 0.017 | kg/t |
Table 4: Overview of applied emission factors applied for electric steel production
pollutant | Type of source | EF 1995 | EF 2000 | EF 2005 | EF 2010 | EF 2016 | unit |
---|---|---|---|---|---|---|---|
B(a)P | 2.531 | 1.661 | 0.792 | 0.271 | 0.271 | mg/t | |
Cd | 0.240 | 0.157 | 0.065 | 0.016 | 0.016 | g/t | |
CO | channelled | 1.700 | 1.187 | 0.674 | 0.366 | 0.366 | kg/t |
CO | diffuse | 0.001 | kg/t | ||||
Cr | channelled | 0.481 | 0.206 | 0.258 | 0.323 | 0.323 | g/t |
Cr | diffuse | 0.851 | g/t | ||||
Hg | channelled | 0.306 | 0.288 | 0.154 | 0.070 | 0.070 | g/t |
Ni | channelled | 0.483 | 0.207 | 0.145 | 0.124 | 0.124 | g/t |
Ni | diffuse | 0.284 | g/t | ||||
NMVOC | 0.035 | 0.024 | 0.012 | 0.006 | 0.006 | kg/t | |
NOx | channelled | 0.122 | 0.12 | 0.106 | 0.098 | 0.098 | kg/t |
NOx | diffuse | 0.014 | kg/t | ||||
PAH | 45 | 22 | 3.793 | 3.790 | 3.793 | mg/t | |
Pb | channelled | 4.075 | 1.747 | 0.720 | 0.170 | 0.170 | g/t |
Pb | diffuse | 0.056 | g/t | ||||
PCB | 5.68 | 3.360 | 1.500 | 1.500 | 1.500 | mg/t | |
PCDD/F | 0.466 | 0.295 | 0.158 | 0.158 | 0.158 | µg/t | |
SO2 | channelled | 0.113 | kg/t | ||||
SO2 | diffuse | 0.004 | kg/t | ||||
TSP | channelled | 0.28 | 0.12 | 0.074 | 0.018 | 0.018 | kg/t |
TSP | diffuse | 0.043 | 0.043 | kg/t | |||
PM10 | channelled | 0.179 | 0.08 | 0.051 | 0.013 | 0.013 | kg/t |
PM10 | diffuse | 0.007 | 0.007 | kg/t | |||
PM2.5 | channelled | 0.045 | 0.04 | 0.038 | 0.011 | 0.011 | kg/t |
Table 5: Overview of applied emission factors applied for hot and cold rolling
pollutant | Type of source | EF 1995 | EF 2000 | EF 2005 | EF 2010 | EF 2016 | unit | Trend |
---|---|---|---|---|---|---|---|---|
CO | 0.005 | 0.005 | kg/t | constant | ||||
NH3 | 0.700 | g/t | constant | |||||
NMVOC | 0.003 | kg/t | constant | |||||
NOx | 0.410 | 0.276 | 0.196 | 0.196 | kg/t | falling | ||
SO2 | 0.059 | 0.050 | 0.044 | 0.044 | kg/t | falling | ||
TSP | channelled | 0.020 | 0.020 | kg/t | constant | |||
TSP | diffuse | 0.010 | 0.010 | kg/t | constant | |||
PM10 | channelled | 0.304 | 0.304 | g/t | constant | |||
PM10 | diffuse | 0.645 | 0.645 | g/t | constant | |||
PM2.5 | channelled | 0.266 | 0.266 | g/t | constant |
Table 6: Overview of applied emission factors applied for iron and steel casting
pollutant | EF 2010 | unit | Trend |
---|---|---|---|
B(a)P | 10 | mg/t | constant |
NH3 | 0.027 | kg/t | falling |
NMVOC | 0.150 | kg/t | constant |
NOx | 0.242 | kg/t | falling |
PAH | 0.100 | g/t | constant |
PCDD/F | 0.190 | µg/t | constant |
SO2 | 0.256 | kg/t | falling |
TSP | 0.200 | kg/t | constant |
PM10 | 0.137 | kg/t | constant |
PM2.5 | 0.0836 | kg/t | constant |
Discussion of emission trends
Trends in emissions correspond to trends of emission factors in the table above, in many cases due to regulatory measures. Since 2010, the main driver for the emission trends in most cases is the activity data.
Recalculations
Replacing data of the preliminary energy balance with data of the final energy balance leads to restatements for the years 2017 and 2018.
For more information on recalculated emission estimates for Base Year and 2018, please see the pollutant specific recalculation tables following chapter 8.1 - Recalculations.
Planned improvements
HCB emissions from iron and steel production have not been included so far due to a lack of emission data (notation key NE). In the past, the standard emission factor was not considered as appropriate, because it was unclear from what kind of data the factor was derived from and to which process/activity rate it actually referred to. In order to overcome this data gap, information will be collected within the scope of a reserach project for updating and completing the emission factors for the sector. The project will start in 2021 and is designed to run three years.
As long as no country specific emission factor for HCB has been derived, the standard emission factor is used. In implementing the EMEP/EEA Guidebook standard emission factor Germany is following recommendations provided by the Expert Review Team for the NECD-Review in 2020.