Preparation method of low-cost petroleum fracturing propping agent

The invention relates to a preparation method of a low-cost petroleum fracturing propping agent. A low-density fracturing propping agent is prepared by taking low-price raw mineral materials and industrial wastes as main raw materials, belonging to the technical field of new materials of petrochemical industry. The preparation method comprises the following steps: by taking 16-60wt% of olivine powder or 15-65wt% of boron mud powder or 15-70wt% of chlorite powder as main raw materials, proportioning 5-60wt% of silica powder and 2-30wt% of clay powder in the main raw materials; uniformly mixing the raw materials and balling in a balling pot to obtain a semi-product; and calcining the semi-product in a rotary kiln at 1200-1300 DEG C to obtain the low-density fracturing propping agent. According to the preparation method provided by the invention, the purpose of reducing the calcining temperature and improving the yield is realized by changing the system of the raw materials and introducing the industrial waste w