Method for controlling dry dedusting and explosion venting of converter

The invention discloses a method for controlling dry dedusting and explosion venting of a converter. The method comprises the following steps of adjusting the preset opening of an oxygen flow regulating valve before blowing, keeping low flow 3 seconds before blowing, presetting an opening upper limit when the slag quantity is large, the steel scrap is light and thin, the oxygen pressure is less than or equal to 1.8 MPa, and blowing in the earlier stage, when the slag quantity is small, the steel scrap is light and thin, the oxygen pressure is greater than or equal to 2.0 MPa, and blowing in the middle and later stages, presetting an opening lower limit; keeping a furnace mouth is kept at micro-positive pressure by adjusting the rotating speed of a fan; when the oxygen content of the gas analyzer in the flue is larger than or equal to 20%, lowering an oxygen lance for blowing; in the automatic state, slowing down the carbon-oxygen reaction, controlling the low-flow time, and when the oxygen content is reduced,