Lubricant oil special used for wheel belt in calcining kiln and preparation method thereof

The invention discloses a lubricant oil special used for a wheel belt in a calcining kiln and a preparation method thereof. The lubricant oil is prepared with heavy-load industrial closed gear oil as a base oil and graphite powder and molybdenum disulfide as a solid additive, the components are uniformly mixed according to the weight ratio of 7:2:1 for blending the lubricant oil. The preparation method comprises the steps of: uniformly mixing and stirring the heavy-load industrial closed gear oil, the graphite powder and the molybdenum disulfide according to the constant weight ratio of 7:2:1 for 1-2 h at 300-500 r/min. The lubricant oil can be optionally blended according to practical demand for satisfying lubricating demand of a wheel belt pad plate under different work status. The lubricant oil is low in cost. For examples, L-CKD320 oil is about 17 yuan/kg in purchase price, graphite powder in 500 meshes is about 40 yuan/kg in purchase price and the molybdenum disulfide in 2000 meshes is about 160 yuan/kg