Method for recycling iodine, fluorine and silicon resources from phosphorous chemical tail gas

The present invention discloses a method for recovering iodine, fluorine, silicon resources from the exhaust gas, the process first containing a washing solution of phosphorus chemical exhaust reducing agent, the gas iodine, fluorine, silicon and washed down; then wash the silica gel was filtered out, as the silicon raw material processing products of silica; washed with a heat exchanger to cool before entering the circulating wash scrubber off-gas; after washing liquid iodine certain concentration fed iodide analytical column, then the enrichment , Analysis of iodine to give the iodo product; a certain time after washing cycle that the fluorosilicate parsed iodine discharged into fluorosilicate grooves give fluorosilicate. The method of the present invention effectively solves the clogging of the gas phase silica gel, but also silicon separate recycling.