Abstract
It is proved that the use of a variable inhomogeneous magnetic field, created by the superposition of constant and variable, strongly inhomogeneous fields, is considered to be very promising for the separation of non-magnetic fraction from powders of magnetic materials. This article introduces the effective technology of separation of non-magnetic fraction from the sludge wastes of metal production in the electromagnetic field, which allows to destroy the aggregates, to separate the abrasive and to get products of high purity. A complex on processing of grinding sludge includes the following blocks: the loading block with dispenser; block of preliminary squeezing and washing of DRC; the block of drying; the block of a refinement; the block of division of sludge fractions. Experimental approbation of the proposed technological scheme of sludge separation, which had been carried out on iron ore concentrate of class 63 microns with silica content of 4.57% of the mass, showed that with the field parameters close to the calculated, the magnetic vibrating layer of iron powder PZh-4M has the maximum development; increasing the separation time leads to more efficient separation in the interval of field induction gradient from 550 mT/ m to 610 mT/m.
Highlights
At the enterprises of mechanical engineering and metal industry which carry out the processing of metals thousands of tons of metal-containing slimes are monthly formed
Grinding slime which represents a mixture of small metal shavings, abrasive, technical oils, drawing lubricant-coolant (DRC) and other components is especially complicated by its structure
Technologies of processing and enrichment of grinding slimes and wastes of metallurgical productions are so far insufficiently developed for successful launching into production
Summary
At the enterprises of mechanical engineering and metal industry which carry out the processing of metals thousands of tons of metal-containing slimes are monthly formed. In such a field powders of magnetic materials, under a certain ratio of parameters, form a magneto-vibrating layer in which the destruction of natural aggregates and, as a result, the efficient separation of non-magnetic contaminations takes place.
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