The invention belongs to the technical field of ore
processing treatment, and particularly relates to a celestite ore deep desilicication method which comprises the following steps: S1, ore
grinding operation:
grinding celestite ore, and sieving to obtain celestite
powder; s2, desiliconization operation: adding a
hydrochloric acid solution and
ammonium fluoride into the celestite
powder, and carrying out desiliconization, first filtering, first washing and first
drying to obtain desiliconized celestite
powder; s3, alkali washing operation: adding a
sodium hydroxide solution into the desiliconized celestite powder, and carrying out alkali washing, second filtering, second washing and second
drying to obtain alkali-washed celestite powder; and S4,
pickling operation: adding a
sulfuric acid solution into the alkali-washed celestite powder, and carrying out
pickling, third filtering, third washing and third
drying to obtain refined celestite powder. According to the deep desilicication method for the celestite ore,
silicon can be effectively removed under the condition that the low
loss rate of
strontium is ensured only through the low
reaction temperature.