Nizhny Novgorod State Technical University (Nizhny Novgorod Russia):

I. O. Leushin, Dr. Eng., Prof., Head of Dept. of Metallurgical Technologies and Equipment, E-mail: igoleu@yandex.ru
V. S. Makarov, Dr. Eng., Associate Prof., Dept of Construction and Road Machines, E-mail: makvl2010@gmail.com
L. I. Leushina, Candi. Eng., Associate Prof., Dept. of Metallurgical Technologies and Equipment, E-mail: kafmto@mail.ru
M. A. Geiko, Senior Lecturer, Dept. of Metallurgical Technologies and Equipment, E-mail: mices@bk.ru

In the context of the general problem of utilization and recycling of industrial waste, the authors considered the possibility of using two types of waste of paint and varnish products of the GAZ Group of Companies — ML-12 and ML-1110 car enamels in the production of cast iron castings. Both materials are non-viscous liquid — a suspension of pigments in a solution of alkyd and melamine-formaldehyde resins in organic solvents with the addition of a solvent. The annual output of each type of waste at the base enterprise exceeds 500 tons. It was revealed that the solvent, xylene, butanol, as well as butyl acetate and white spirit, present in the composition of both types of waste and having a total share of more than 50%, are flammable liquids of organic nature with properties of solvents with a mass density lower than the density of water. Carboncontaining substances and titanium dioxide were found in the composition of the car enamel pigment. The complex of physical and operational properties of auto enamels generally meets the requirements for parting coatings and foundry paints used in the production of cast iron castings. The prerequisites for conducting assessments and making a technical decision are described in detail, the results of the program implementation are analyzed. An experimental test of the operability of the selected options for the use of waste materials was carried out in conditions of the existing production. The studies carried out have confirmed the feasibility of assessing the potential of industrial waste for recycling, which makes it possible to reduce the volume of consumed primary materials, reduce the cost of production and the environmental burden. It was recommended the enterprise to consider the possibility of using waste of ML-12 and ML-1110 auto enamels as a parting coating for foundry metal models, and use the waste of ML-12 auto enamel for painting casting molds in the production of iron casting.

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