Method for inhibiting chlorine from being generated when coarse nickel hydroxide is leached with concentrated hydrochloric acid

The invention provides a method for inhibiting chlorine from being generated when coarse nickel hydroxide is leached with concentrated hydrochloric acid. The method includes the steps that a sample is taken, and the concentration of hydrogen ions of a solution in a reaction kettle is analyzed, wherein the [H] is controlled to be lower than 0.83 mol/L in the reaction process; whether materials or acid are/is first fed in the leaching operation process is determined according to the measuring result of the acidity in the reaction kettle, wherein, particularly, when the acidity is larger than 0.7 mol/L, the materials are first slowly fed for adjustment, and the feeding amount is controlled to be lower than 2 t/h; when the acidity of the solution is lower than 0.01 mol/L, the concentrated hydrochloric acid is first slowly added for adjustment, the flow of the concentrated hydrochloric acid is controlled to be lower than 3 m /h; when the acidity ranges from 0.01 mol/L to 0.7 mol/L, the materials and the acid ca