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A method for selecting sulfur by using sodium fluorosilicate mother liquor as iron sulfide ore activator

A technology of iron sulfide ore and sodium fluorosilicate, applied in flotation, solid separation, etc.

Active Publication Date: 2015-10-28
KUNMING CHUAN JINNUO CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, there is no report on the patent of the method of using sodium fluorosilicate mother liquor as an activator for sulfur selection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a method for concentrating sulfur with sodium fluorosilicate mother liquor as activator of pyrite. The method includes the technological steps that first, the pyrite is obtained after flotation of lead and zinc is performed on lead, zinc and sulfur polymetallic sulfide ore, the pyrite contains a great amount of free CaO and 16-30% of FeS2, the pyrite is ground till the fineness of -200 meshes larger than 80%, and the solid content of ore pulp is 20-45%; second, the sodium fluorosilicate mother liquor is added into the ore pulp, activating reaction is carried out, the reaction time is 30-60min, and the pH of the ore pulp is 4.5-6.0 after the reaction is finished; third, the ore pulp after the reaction is fed into a flotation machine, meanwhile, flotation reagents are added, sulfur concentrate is obtained after air inflation and bubble scrapping are finished, and the adding method of the flotation reagents includes the steps that the flotation reagents accounting for 60-80% of the total amount are added before the flotation of the ore pulp, and the rest of the flotation reagents are evenly added stage by stage after every stage of flotation before discharge of tailings. With the method, the quality of the concentrated sulfur concentrate and the sulfur recovery rate can be guaranteed, activator cost is saved, and pressure on environmental protection is relieved.

Description

technical field [0001] The invention relates to a sodium fluorosilicate mother liquor used as an activator for iron sulfide ore, in particular to a method for utilizing the sodium fluorosilicate mother liquor on site to select sulfur. Background technique [0002] Sodium fluorosilicate is an auxiliary product of wet-process phosphoric acid and fluosilicic acid, which is the waste liquid of concentrated phosphoric acid plant. It is commonly used to react with sodium sulfate and fluorosilicate. The reaction principle is Na 2 SO 4 +H 2 SiF 6 →Na 2 SiF 6 ↓+H 2 SO 4 , a large amount of waste water will be produced in the production process, that is, the mother liquor. The main components of the mother liquor are dilute sulfuric acid, incompletely reacted fluorosilicic acid, and soluble sodium fluorosilicate, which are highly corrosive and cannot be discharged directly. Discharge can only be carried out after meeting the requirements of environmental protection. Lime is oft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00
Inventor 曾润国杨兴刘甍魏家贵刘泽祥冯发钧周永祥
Owner KUNMING CHUAN JINNUO CHEM IND
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