Open AccessOPTIMIZATION OF GRANULOMETRIC COMPOSITION OF POWDERS MADE BY ELECTROEROSION DISPERSION OF BALL BEARING STEEL WASTE
Author(s) -
Е. В. Агеева,
S. V. Hardikov,
A A Gorokhov,
L. P. Andreeva
Publication year - 2017
Publication title -
izvestiâ ûgo-zapadnogo gosudarstvennogo universiteta
Language(s) - English
Resource type - Journals
eISSN - 2686-6757
pISSN - 2223-1560
DOI - 10.21869/2223-1560-2017-21-6-68-75
Subject(s) - materials science , particle size , dispersion (optics) , ball mill , energy consumption , process engineering , metallurgy , waste management , engineering , physics , electrical engineering , optics , chemical engineering
As practice shows, most of the methods to obtain powder materials have several disadvantages: high power consumption, environmental problems (waste water, emissions), high cost of technological equipment. Currently, one of the most promising methods for producing powder materials from the conductive waste is the method of electroerosion dispersion (EED). EED method has a relatively low energy consumption and environmental cleanliness of the process. The development of technology of making powder materials from ball bearing steel waste, and assessment of their use effectiveness requires comprehensive theoretical and experimental studies. The iImplementation of the planned measures will allow us to solve the problems of obtaining powder materials including iron based nanopowder, elimination of ball bearing steel waste and their further use and, thereby, reduce the production cost of the final product. The aim of the present paper is to optimize the granulometric composition of powders made by electroerosion dispersion of waste-bearing steel waste. Our study has experimentally determined inversely proportional relationship between average particle size of powder material and the capacity of energy discharge capacitors and the voltage on the electrodes in the reactor. It has also stated inversely proportional dependence of the average particle size of powder material on pulse repetition frequency of EED installation in the range up to 90 Hz. Further increase of energy discharge capacitors capacity leads to an increase in the average particle size of powder material. By making factorial experiment there have been determined the optimal settings for the process of powder materials production by the method of electricerosion dispersing in distilled water: the capacity of energy discharge capacitors is 58 ufd, voltage on the electrodes is 140 W, pulse repetition frequency is 140 Hz.