Method for concentrating sulfur with sodium fluorosilicate mother liquor as activator of pyrite
A technology of iron sulfide ore and sodium fluorosilicate, applied in flotation, solid separation, etc.
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Embodiment 1
[0008] A method of utilizing sodium fluorosilicate mother liquor as an iron sulfide ore activator for sulfur selection, which is operated and processed according to the following steps:
[0009] 1. Iron sulfide ore containing a large amount of free CaO, its FeS 2 16-20%, ground to a fineness of -200 mesh 80-85%, and a solid content of 20-30% pulp;
[0010] 2. Add sodium fluorosilicate mother liquor in a certain proportion for activation reaction, the reaction time is 30-45 minutes, and the pH is 4.5-5.5 after the reaction;
[0011] 3. After the activation reaction, the ore pulp enters the flotation machine, and the flotation agent is added at the same time. After aeration and scraping, the sulfur concentrate with a sulfur content of 42-45% is obtained, and the sulfur recovery rate reaches 95-97%. The addition method of flotation agent is to add 65% of the total amount before pulp flotation, and the rest is evenly added after each stage of flotation before discharging t...
Embodiment 2
[0013] A method of utilizing sodium fluorosilicate mother liquor as an iron sulfide ore activator for sulfur selection, which is operated and processed according to the following steps:
[0014] 1. Iron sulfide ore containing a large amount of free CaO, its FeS 2 25-30%, ground to a fineness of -200 mesh 85-90%, solid content of 30-35% ore slurry;
[0015] 2. Add sodium fluorosilicate mother liquor in a certain proportion for activation reaction, the reaction time is 45-60 minutes, and the pH is 5.0-6.0 after the reaction;
[0016] 3. After the activation reaction, the ore slurry enters the flotation machine, and the flotation agent is added at the same time. After aeration and scraping, the sulfur concentrate with a sulfur content of 45-48% is obtained, and the sulfur recovery rate reaches 93-96%. The way of adding flotation agent is to add 75% of the total amount before pulp flotation, and the rest are evenly added after each stage of flotation before discharging tai...
Embodiment 3
[0018] A method of utilizing sodium fluorosilicate mother liquor as an iron sulfide ore activator for sulfur selection, which is operated and processed according to the following steps:
[0019] 1. Iron sulfide ore containing a large amount of free CaO, its FeS 2 20-25%, ground to a fineness of -200 mesh 80-85%, solid content of 40-45% ore slurry;
[0020] 2. Add sodium fluorosilicate mother liquor in a certain proportion for activation reaction, the reaction time is 40-60 minutes, and the pH is 4.8-5.8 after the reaction;
[0021] 3. After the activation reaction, the ore slurry enters the flotation machine, and the flotation agent is added at the same time. After aeration and scraping, the sulfur concentrate with a sulfur content of 45-50% is obtained, and the sulfur recovery rate reaches 90.5-94%. The addition method of flotation agent is to add 80% of the total amount before pulp flotation, and the rest is evenly added after each stage of flotation before dischargi...
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