EXPLANATORY DOCUMENT RELATED TO THE REPORT: “COMPARATIVE STUDY OF DIFFERENT ENVIRONMENTAL TECHNIQUES IN THE SECTOR PRODUCING MAGNESIUM OXIDE FROM MAGNESITE1 VIA DRY PROCESS” __________________________________________________
March, 2009
1
It has to be noted that in the mentioned report there is a mistake: instead of “magnesite” there is written “magnesium”.
INDEX
1.
OBJECTIVE/PURPOSE
3
2.
ABOUT THE COMPANY THAT CARRIED OUT THE REPORT AND THIS EXPLANATORY DOCUMENT
4
3.
DATA REFERENCES
5
4.
SOX EMISSIONS DATA
9
4.1
4.2
5.
“Comparative Study of Different Enviromental Techniques in the Sector Producing Magnesium Oxide from Magnesite Via Dry Process” Section 4.1.1, page 12.
9
“Comparative Study of Different Enviromental Techniques in the Sector Producing Magnesium Oxide from Magnesite Via Dry Process” Section 4.1.2, page 15.
9
QUALITATIVE ANALYSIS
11
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1. OBJECTIVE/PURPOSE The aim of this document is to clarify some aspects of the report “Comparative Study of Different Enviromental Techniques in the Sector Producing Magnesium Oxide from Magnesite Via Dry Process” in reply to the requests made by the IEF to the Spanish Environment Ministry (MARM, Ministerio de Medio Ambiente, Medio Rural y Marino). The document has been structured according to the main issues that were asked:
References of the company who carried out the report
Sources of the data used in the report
Specific explanations about the data used for SOX emissions
In order to show the conclusions clearer, it has been also included a qualitative brief of the report about the different techniques assessed. This has been done due to the purpose of the report: it is not to show exact data or numbers but to compare alternatives according their impact on some environmental recipients.
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2. ABOUT THE COMPANY THAT CARRIED OUT THE REPORT AND THIS EXPLANATORY DOCUMENT The company, Garrigues Medio Ambiente SLP, is a Spanish consultancy firm that has more than 15 years of experience on environmental and energy matters. The company boasts a multidisciplinary team of environmental specialists hailing from both technical (engineers, chemists, geologists, economists, etc.) and legal backgrounds, which places it in an ideal position to offer integral advisory services. For more information about Garrigues Medio Ambiente SLP, see the attached presentation “Garrigues Medio Ambiente Services”.
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3. DATA REFERENCES
Section 4.1.1, page 12. SOX and dust concentrations in gas effluent. Concentration (mg/Nm3)
Alternative Technique
SO2
Particles
ESP + WS
< 50 - 400
< 35
FF + WSa
10000 mg/l due to wet scrubber use. Data provided by a company in order to elaborate a letter from EUROMINES to the IPPC Secretariat after a TWG meeting in Seville (September 8-12th 2008). These data have been provided to Garrigues Medio Ambiente SLP by a company in the TWG exclusively in order to facilitate the development of the report.
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Section 4.3, page 20. Electricity consumption for different technologies applied.
Technology
Consumption (kWh/t MgO)
ESP
4.15
FF
5.24
WS
8.18
dSI
1.53
Due to lack of data regarding magnesium oxide production, it has been taken data regarding to cement production from Draft Reference Document on Best Available Techniques in the Cement, Lime and Magnesium Oxide Manufacturing Industries. February 2009. Chapter 1, section 1.4.8.1, page 154 and section 1.4.8.3, page 158.
Section 4.3, page 21. For the generation of 1GJ of electricity in Europe 0.10 kg SO2/GJ and 117 kg CO2/GJ are emitted. Reference Document on Best Available Techniques on Economics and CrossMedia Effects. July 2006. Annex 8-European energy mix, page 110.
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4. SOX EMISSIONS DATA 4.1
“Comparative Study of Different Enviromental Techniques in the Sector Producing Magnesium Oxide from Magnesite Via Dry Process” Section 4.1.1, page 12. The data related to the different SOX concentrations (mg/Nm3) in the gas effluent for each technique has been taken from the sources stated in the previous section: Alternative Technique ESP + WS
Concentration SO2 (mg/Nm3) < 50 - 400
FF + WSa
