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Beneficiation method adopting sulfuric acid for pre-activating iron zinc oxide ore

A technology of zinc oxide ore and beneficiation method, applied in flotation, solid separation, grain treatment and other directions, can solve the problems of difficult to handle iron hydroxide, low recovery rate of zinc concentrate, large amount of sodium sulfide, etc., to improve adsorption Probability, efficient enrichment and recovery, and the effect of improving sorting efficiency

Active Publication Date: 2019-03-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] Aiming at the problems in the iron-contaminated zinc oxide beneficiation method in the prior art that the iron hydroxide is difficult to handle, the amount of sodium sulfide is large, and the recovery rate of zinc concentrate is low, a sulfuric acid pre-activated iron-based zinc oxide ore beneficiation process is provided. That is, the dispersant is added to the mill to strengthen the dispersion of the slime, and then the zinc oxide minerals are pretreated with dilute sulfuric acid in a weakly acidic environment, and the interference of iron hydroxide is eliminated after long-term stirring, and finally Add iron inhibitors, zinc activators, and collectors in sequence to strengthen the inhibition of iron oxide and activate zinc oxide minerals to obtain zinc concentrates and tailings

Method used

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Embodiment 1

[0032] Embodiment 1: This embodiment takes Guilin zinc oxide ore as the research object, and the ore Zn grade is 6.34%, wherein smithsonite accounts for 64%, hemimorphite accounts for 28%, and gangue minerals are mainly quartz, silicate minerals, carbonate minerals and limonite;

[0033] A sulfuric acid preactivated ferric zinc oxide ore beneficiation method, the specific steps are as follows:

[0034] (1) Add a dispersant (water glass) to the iron zinc oxide ore, and then grind the ore until the fineness is -0.074mm, accounting for 99%, to obtain the iron zinc oxide ore pulp, which is calculated as the iron zinc oxide ore raw ore, The amount of dispersant (water glass) is 500g / t;

[0035](2) Adjust the iron zinc oxide ore slurry obtained in step (1) to a concentration of 30%, then add dilute sulfuric acid to adjust the pH of the slurry to 6, and stir for 20 minutes for pretreatment, then add a regulator (sodium carbonate) and adjust the slurry pH to 10, then add iron inhibi...

Embodiment 2

[0039] Embodiment 2: the research object of this embodiment is identical with embodiment 1;

[0040] A sulfuric acid preactivated ferric zinc oxide ore beneficiation method, the specific steps are as follows:

[0041] (1) Add a dispersant (water glass) to the ferric zinc oxide ore, and then grind the ore until the fineness is -0.074mm, accounting for 95%, to obtain the ferric zinc oxide ore slurry. The amount of dispersant (water glass) is 1000g / t;

[0042] (2) Adjust the ferric zinc oxide ore slurry obtained in step (1) to a concentration of 33%, then add dilute sulfuric acid to adjust the pH of the slurry to 6.5, and stir for 15 minutes, then add a regulator (sodium hydroxide) and adjust The pH of the pulp is 10, then add iron inhibitor (sodium humate) and stir for 10 minutes, then add zinc activator A (sodium sulfide) and stir for 5 minutes, then add collector A (octadecylamine) and stir for 3 minutes, at a stirring intensity of 3000r / min under the condition of strong ag...

Embodiment 3

[0046] Embodiment 3: This embodiment takes Tengchong zinc oxide ore as the research object, and the ore Zn grade is 8.04%, wherein smithsonite accounts for 70%, hemimorphite accounts for 25%, and the gangue minerals are mainly quartz, silicate minerals, carbonate minerals and limonite;

[0047] A sulfuric acid preactivated ferric zinc oxide ore beneficiation method, the specific steps are as follows:

[0048] (1) Add a dispersant (sodium hexametaphosphate) to the iron zinc oxide ore, and then grind the ore until the fineness is -0.074mm, accounting for 70%, to obtain the iron zinc oxide ore pulp, of which the iron zinc oxide ore raw ore In total, the amount of dispersant (sodium hexametaphosphate) is 2000g / t;

[0049] (2) Adjust the ferric zinc oxide ore slurry obtained in step (1) to a concentration of 35%, then add dilute sulfuric acid to adjust the pH of the slurry to 7, and stir for 10 minutes for pretreatment, then add a regulator (sodium hydroxide) and adjust The pH of...

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Abstract

The invention discloses a beneficiation method adopting sulfuric acid for pre-activating an iron zinc oxide ore, and belongs to the technical field of mineral processing. According to the method, a dispersing agent is added into a grinding machine, so that the dispersing effect of a mineral mud is enhanced; then zinc oxide minerals are preprocessed in a weak acid environment by adopting the dilutesulfuric acid, and the interference of iron hydroxide is eliminated after long-time stirring; and finally, an iron inhibitor, a zinc activator and a collecting agent are sequentially added, and inhibition on iron oxides is reinforced and the zinc oxide minerals are activated; and meanwhile, a gangue inhibitor is added in the zinc concentration stage, so that the grade of zinc concentrate is further improved. According to the method, the problems that the iron hydroxide polluted by iron is difficult to process, the use amount of sodium sulfide is large, and the recovery rate of the zinc concentrate is low in a zinc oxide beneficiation method are solved.

Description

technical field [0001] The invention relates to a ferric zinc oxide ore beneficiation method with sulfuric acid preactivation, which belongs to the technical field of mineral processing. Background technique [0002] The mineral composition of zinc oxide ore is complex. In addition to a large amount of soluble salts such as gypsum, copper sulfate, and zinc sulfate, and easy-to-mud minerals such as ochre, lead alum, etc., it often contains a large amount of iron oxide minerals. The iron sulfate and zinc sulfate formed by the dissolution of iron oxide in the pulp interact with alkaline earth metal carbonates to produce ferrosmithsonite [(ZnFe)CO 3 ], it decomposes into smithsonite and iron hydroxide when it contacts with groundwater or flotation water with appropriate ions, and iron hydroxide covers the surface of smithsonite, seriously reducing the floatability of smithsonite. [0003] The commonly used beneficiation methods of zinc oxide ore include sulfuration-amine flotat...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/02B03B1/00B02C23/06
CPCB02C23/06B03B1/00B03D1/00B03D1/02
Inventor 姚艳清刘四清
Owner KUNMING UNIV OF SCI & TECH
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