The invention discloses a method for preparing
strontium chloride by using
strontium slag. The method specifically comprises the following steps: (1), firstly
grinding the
strontium slag into
powder, then sieving the ground strontium
slag through a 100-mesh
sieve; (2), adding
hydrochloric acid in the sieved strontium slag
powder, wherein the weight ratio of
hydrochloric acid to the strontium slag
powder is 1.25:1; then stirring, reacting for 2-4h, filtering to obtain supernate after the reaction is ended; (3), adding
sulfuric acid in the supernate prepared in the step (2), stirring, and reacting for 1-2h; (4), after the reaction is ended, adding
strontium hydroxide in the solution, regulating pH of the solution to 6.5-7.5, standing, and filtering to obtain filtrate after completely
settling; and (5), heating, evaporating and crystallizing the filtrate obtained in the step (4) to obtain the
strontium chloride. The method provided by the invention has the advantages of simplicity, low requirement on equipment, safety, environment friendliness, high yield, and the like.