METHOD FOR TREATING DUST-COLLECTED WATER FOR WASTE GAS IN CONVERTER

摘要

PROBLEM TO BE SOLVED: To improve the recovering ratio of coarse grain dust in a coarse grain separator, to reduce a recycling cost of waste gas dust in a converter and to improve the recycling efficiency when the dust-collected water for waste gas in the converter is treated.

SOLUTION: When a coagulating sedimentary treatment is applied with a thickener 3 after separating the coarse grain dust by introducing the dust-collected water containing the dust obtained with a wet-type dust-collecting treatment to the waste gas in the converter, into the coarse grain separator 2, high molecular coagulant is added into the dust-collected water introduced into the coarse grain separator 2 and/or the coarse grain separator 2. The separated recovering ratio of the coarse grain dust at the coarse grain separator 2 can be improved by adding the high molecular coagulant and performing the coagulating separation in the coarse grain separator 2.

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