Anti-sticking coating for oxygen lance of converter and preparation method of anti-sticking coating

The invention relates to the field of refractory coatings, in particular to a converter oxygen lance anti-sticking coating and a preparation method thereof. Raw materials of the converter oxygen lance anti-sticking coating comprise powder and a liquid binding agent, and the mass dosage ratio of the powder to the liquid binding agent is 1: (2-3.5). The powder material comprises the following components in parts by weight: 15-30 parts of calcium carbonate powder, 46-83 parts of a fire-resistant additive, 6-11 parts of a thickening agent, 6-10 parts of a dispersing agent, 5-15 parts of graphite and 1-4 parts of an anti-settling agent; the liquid binding agent is at least one of water glass, phosphate and sol. The preparation method comprises the following steps: preparing powder: stirring and mixing the calcium carbonate powder, the refractory additive, the thickening agent, the dispersing agent, the graphite and the anti-settling agent to obtain the powder; and preparing the coating: stirring and mixing the pre