Method for reducing total cyanide concentration of tailings in gold ore dressing process

The invention discloses a method for reducing the total cyanide concentration of tailings in a gold ore beneficiation process. The method for reducing the total cyanide concentration of the tailings comprises the following steps that raw ore grinding is carried out, the raw ore particles and the water are mixed, the ore is ground until the fineness is -0.043 mm and the content of the ore is 79%; the gold ore concentrate and the tailings are re-selected, the raw ore grinding products obtained in the raw ore grinding step with fluidized water are mixed, and the ore pulp is re-selected by a reselecting machine to obtain gold concentrate and reselection tailings; and the heavy tailings are leached to obtain pregnant solution and leaching residue, and carrying out low-cyanogen leaching on the reselection tailings obtained in the previous step by using a low-cyanogen leaching agent for 36 hours, and solid-liquid separation is carried out to obtain the pregnant solution and the leaching residue. According to the met