# Commission Implementing Decision of 28 February 2012 establishing the best available techniques (BAT) conclusions under Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions for the manufacture of glass (notified under document C(2012) 865) (Text with EEA relevance) (2012/134/EU), Division 1.10.5: Metal emissions

Extent: E+W+S+N.I.

Technique
Description
Selection of raw materials for the batch formulation with a low content of metals
The technique consists of a careful selection of batch materials that may contain metals as impurities (e.g. external cullet), in order to reduce at source metal emissions which arise from the decomposition of these materials during the melting process
Minimising the use of metal compounds in the batch formulation, where colouring and decolourising of glass is needed, subject to consumer glass quality requirements
The minimisation of metal emissions from the melting process may be achieved as follows:
minimising the quantity of metal compounds in the batch formulation (e.g. iron, chromium, cobalt, copper, manganese compounds) in the production of coloured glasses
minimising the quantity of selenium compounds and cerium oxide used as decolourising agents for the production of clear glass
Minimising the use of selenium compounds in the batch formulation, through a suitable selection of the raw materials
The minimisation of selenium emissions from the melting process may be achieved by:
minimising/reducing the quantity of selenium in the batch formulation to the minimum commensurate with the product requirements
selecting selenium raw materials with a lower volatility, in order to reduce the volatilisation phenomena during the melting process
Application of a filtration system
Dust abatement systems (bag filter and electrostatic precipitator) can reduce both dust and metal emissions since the emissions to air of metals from glass melting processes are largely contained in particulate form. However, for some metals presenting extremely volatile compounds (e.g. selenium) the removal efficiency may vary significantly with the filtration temperature
Dry or semi-dry scrubbing, in combination with a filtration system
Gaseous metals can be substantially reduced by the use of a dry or semi-dry scrubbing technique with an alkaline reagent. The alkaline reagent reacts with the gaseous species to form a solid which has to be removed by filtration (bag filter or electrostatic precipitator)

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Source: https://www.legislation.gov.uk/eudn/2012/134/annex/division/5/division/10/division/1.10/division/1.10.5 (the official version)
Page: https://openlegislation.uk/eu-decision-2012-134/annex/division-5/division-10/division-1.10/division-1.10.5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.