Melting

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1. OBJECTIVE


The objective of melting is to obtain a phase change from solid to liquid, in order to prepare the material for further processing (e.g. for fats, processed cheese) or to recover the melted fraction (i.e. in fat recovery) (BAT in the Food, Drink and Milk Industries, June 2005).


2. FIELD OF APPLICATION


Melting is a process which is carried out in different industries, such as foodstuffs and machineries.


3. DESCRIPTION OF TECHNIQUES, METHODS AND EQUIPMENT


For melting in the food industry, processing kettles are used. These can be operated either batch-wise or continuously. Heating may be carried out by direct steam injection or indirectly by steam jackets. Processing kettles are available in various sizes and shapes. In continuous processing, scraped surface heat exchangers are applied (BAT in the Food, Drink and Milk Industries, June 2005).


Melting in general.jpg

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microwave oven


4. RELEVANT PARAMETERS TO ENERGY


  • Temperature
  • Pressure
  • Medium
  • Material characteristics (e.g. temperature sensitivity)


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