| 摘要 |
PURPOSE:To extent a maintenance period of a filter and to reduce a maintenace expense of the same, by removing iron filings off from a contaminated liquid generated from a work or an electrode prior to filtering of the contaminated liquid by the filter. CONSTITUTION:An electromagnet 7 is provided in a contaminated liquid tank 1. The electromagnet 7 is magnetized and the magnetic field is made to generate by electrifying the electromagnet 7. Iron filings generated through a work is adsorbed from within a contaminated liquid in the contaminated liquid tank 1 by the generated magnetic field. With this construction, half of particulates in the contaminated liquid in the contaminated liquid tank 1 is removed. As the iron filings in the contaminated liquid is removed like this, the particulates in the contaminated liquid tank 1 become only copper filings and a number of the particulates becomes the half. Then, meshes of a filter 5 is hard to be clogged as a number of the particulates is reduced when the contaminated liquid is filtered by the filter 5 due to a matter that the contaminated liquid, whose particulates have become the half, is sent to a filter tank 2 for the contaminated liquid by a feed contaminated liquid pump 3. |
