Підготовка шламів шліфувальних верстатів до металургійного переплаву

Abstract

Waste of the metalworking industry is analyzed from the point of view of their further processing. There is a lack of effective methods of processing and disposal of grinding sludge and, as a consequence, a negative impact on the environment. Existing methods of grinding sludge processing are analyzed. The expediency of applying the method of metallurgical remelting under the condition of special preparation of metal sludges of grinding machines is proved. It is established that briquettes for their further processing should have a certain density and purity. It is suggested to wash the sludge from the LCPM (lubricant-cooling process media) in special solutions using washing machines, briquettes and dry before using them in metallurgical remelting.In order to determine the technological parameters of the process of briquetting sludge grinding machines and drying of briquettes, the effect of pressing pressure, binder concentration and concentration of liquid (water) on the density of briquette was experimentally investigated. Appropriate mathematical dependencies and graphs of surfaces were obtained. It was found that the most significant factor influencing the density of the briquette is the pressure of the press, less significant – the concentration of liquid and binder. In the case of increasing water concentration, the density of the briquette decreases. It is recommended to prevent the briquette from spilling out after drying, to add a binder element of 3–5 % by weight of dry sludge. To dissolve the binder, water is added, the optimal concentration of which is 6–8 %. Technological pressing parameters are recommended.