Authors: G.M. Dubov, A.R. Bogomolov, E.A. Grigorieva, Nokhrin

Title of the article: Analysis of the reasons for the lead concentration increase in waste oil of ice KTA 50 of BelAZ 75131 gas-diesel open-pit dump trucks

Year: 2021, Issue: 3, Pages: 84-93

Branch of knowledge: 25.00.21 Theoretical foundations of the design of mining systems

Index UDK: 622.23.05

DOI: 10.26730/1999-4125-2021-3-84-93

Abstract: Comparative studies of the corrosion properties of oils used in internal combustion engines (ICE) of BelAZ 75131 gas-diesel open-pit dump trucks are presented. It is noted that in practice, along with the efficiency of opencast mining, there are a number of disadvantages, among which there are downtime of open-pit dump trucks caused by the failure of their components and assemblies, including due to changes in the physical and chemical properties of motor oils, which in the process of work accumulate metal impurities of wear products and elements of the chemical interaction of the oil with its contact surfaces (corrosion). This applies in particular to the interaction of oil with babbitt plain bearings. It is assumed that the increase in the concentration of lead in the waste oil of the internal combustion engine of an open-pit dump truck can be influenced by the interaction of the used oil with the bearing bushings of the crank mechanism, which contain lead. The research technique is presented. The data on the values of the pH of the clean test oils and their water-oil emulsions are presented. It is noted that the effect of moisture or oxygen on various types of oils of the same manufacturer's brand affects the formation of either water-soluble organic acids, which enhance the corrosive effect on lead or its alloys, or the formation of alkaline water-soluble organic compounds that have a neutral effect on lead and its alloys. This fact ultimately suggests that the oils used in the internal combustion engines of open-pit dump trucks have various corrosive properties that ultimately affect the content of harmful impurities in waste oils.

Key words: open-pit dump truck gas-diesel operation waste oil lead corrosive properties

Receiving date: 13.05.2021

Publication date: 02.07.2021

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