Method for applying high-phosphorus wastewater to bulk flotation of phosphorite

The invention discloses a method for applying high-phosphorus wastewater to phosphorite bulk flotation, which comprises the following steps: step 1, crushing and grinding silicon-calcium phosphate ore and high-phosphorus wastewater to obtain phosphorite pulp with the mass concentration of 20-35%; step 2, adding a mixture of phosphoric acid and high-phosphorus wastewater into the phosphoric ore pulp obtained in the step 1 as a pH regulator and an inhibitor, and regulating the pH of the phosphoric ore pulp to 4-6; 3, a modified regulator, a fatty acid anion collecting agent and an amine cation collecting agent are sequentially added into the phosphoric ore pulp obtained in the step 2, bulk flotation roughing operation is conducted, roughing concentrate and roughing tailings are obtained, concentration operation is conducted on the roughing concentrate, and phosphate concentrate and middlings I are obtained; 4, the middlings I and roughing tailings obtained in the step 3 are combined, scavenging operation is int