Professional paper
METHOD OF METALWORKING EMULSION SPLITTING AS IMPROVEMENT OF TOTAL FLUID MANAGEMENT
Ljiljana Pedišić
; INA Maziva d.o.o., Zagreb, Hrvatska
Irena Polenus
; INA maziva d.o.o.
Abstract
Selection of a suitable metalworking fluid is not possible without systematically lifecycle considerations that include material production phase, application phase and disposal phase. Metalworking emulsions are used for cooling and lubricating at metalworking operations like rolling, drawing, boring, grinding, milling, sawing, etc. Emulsions are prepared mixing emulsifying concentrate with water at metalworking plant production. Concentrates must be properly optimised in order to obtain the required emulsion working properties. They consist of base oils, emulsifiers, corrosion inhibitors, lubricating additives, biocides, defoamers and other components. During application into working emulsions inflow “tramp” oil, micro-organisms and other contaminants that shorten its working life. Used emulsions can contain up to 10 % of mineral oil, so they should be treated in sense of the separation of oil and other impurities before they are disposed in sewage system. The separation of oil from metalworking emulsions is difficult because they should be stable during whole time of application. Used emulsion can be treated at the site on technical equipment or can transport to the certificated company. The paper shows examination results of used emulsions physical chemical properties and splitting process concerning local and state laws.
Keywords
metalworking fluids; life cycle assessment of metalworking fluid; metalworking emulsions; emulsion splitting; water quality
Hrčak ID:
169682
URI
Publication date:
1.7.2016.
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