Abstract: The paper describes the test on the application of DH-1# electrochemical regulator in Meishang Iron Mine.It was found through laboratory test that, for a ROM ore containing 3% sulfur, the suitable conditions for the electrochemical regulation of flotation was 150 g/t DH-1#, 40  g/t ethyl xanthate and 100 g/t 2# oil.On this basis, an industrial test was conducted and obtained a sulfur concentrate grading 39.03% at a sulfur recovery of 78.53% and sulfur tailings grading 0.440%. The application of DH-1# electrochemical regulator in regulating and controlling the flotation can save the dosage of ethyl xanthate used as the collector by over 58%, enabling an annual economic benefit of 3.49 562 million.

Key words: Sulfur flotation, DH-1# Eleclrochemical regulator, Sulfur reduction