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Method for treating cupric oxide or zinc oxide ores by adopting agitation ammonia leaching and infiltration basin ammonia leaching in combination

A percolation tank and copper oxide technology, applied in the direction of improving process efficiency, can solve the problems of difficult sealing of wet grinding equipment and spiral grading equipment, deterioration of industrial hygiene conditions in production workshops, and increased production costs, so as to improve industrial hygiene Conditions, saving grinding energy consumption, and reducing the effect of liquid consumption

Inactive Publication Date: 2014-07-30
KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] According to the existing wet grinding method, the wet grinding system and the slurry blending system are integrated. If the ammonia is not steamed back to the liquid, and the system is to avoid water expansion and cause the loss of ammonia to the outside, it must be suitable The concentrated ammonia immersion solution required for leaching is added to the wet grinding system, but the wet grinding equipment and spiral classifying equipment of this system are difficult to seal, and the ammonia will be volatilized and lost; the wet grinding also makes the pulp heat up, which intensifies the ammonia Volatile
In this way, not only more ammonia needs to be added before leaching, which increases the production cost, but also the volatilized irritating ammonia smell also deteriorates the industrial hygiene conditions of the production workshop
The way to improve is to cover the grinding and grading equipment, and then set up another fan to pump the tail gas to the absorption tower, but the absorption efficiency of ammonia is not high after it is diluted by air

Method used

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  • Method for treating cupric oxide or zinc oxide ores by adopting agitation ammonia leaching and infiltration basin ammonia leaching in combination
  • Method for treating cupric oxide or zinc oxide ores by adopting agitation ammonia leaching and infiltration basin ammonia leaching in combination
  • Method for treating cupric oxide or zinc oxide ores by adopting agitation ammonia leaching and infiltration basin ammonia leaching in combination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Refractory copper oxide ore with high alkaline gangue content: copper content 1.65%, free copper oxide distribution rate 70.30%, combined copper distribution rate 28.48%, copper sulfide distribution rate 1.22%, CaO: 28.12%, MgO : 2.80%, Fe: 7.97%, Al 2 o 3 : 0.90%, SiO 2 : 9.28% (both are mass percentages, test results after drying, the same below).

[0041] After the above raw ore is crushed beforehand, it is processed according to the following process steps:

[0042] (1) Ultra-fine crushing: Ultra-fine crushing of the raw ore to a particle size of 3mm, and the mass percentage of moisture is controlled to 4%;

[0043] (2) Combined screening: For the materials treated in step (1), first perform dry screening (the sieve aperture of the upper sieve is 1.0mm, and the sieve aperture of the lower sieve is 0.4mm) to separate the upper layer of mud Coarse-grained sand, medium-grained sand with mud in the middle layer and fine-grained dry ore in the lower layer; then add c...

Embodiment 2

[0056] Refractory zinc oxide ore with high alkaline gangue content: 9.75% zinc, 82.75% zinc in carbonate and sulfate form, 14.87% zinc in silicate form, 14.87% zinc in sulfide form Rate 2.38%, Pb: 1.86%, CaO: 15.62%, Fe: l3.73%, MgO: 1.84%, Al 2 o 3 : 2.90%, Si0 2 : 13.76%.

[0057] After the above raw ore is crushed beforehand, it is processed according to the following process steps:

[0058] (1) Ultra-fine crushing: Ultra-fine crushing of the raw ore to a particle size of 3mm, and the mass percentage of moisture is controlled to 4%;

[0059] (2) Combined screening: For the materials treated in step (1), first perform dry screening (the sieve aperture of the upper sieve is 1.0mm, and the sieve aperture of the lower sieve is 0.4mm) to separate the upper layer of mud Coarse-grained sand, medium-grained sand with mud in the middle layer and fine-grained dry ore in the lower layer; then add concentrated ammonia into the immersion solution to the coarse-grained sand with mud,...

Embodiment 3

[0071] Refractory copper oxide ore with high alkaline gangue content: copper content 0.78%, free copper oxide distribution rate 79.82%, copper binding rate 8.27%, copper sulfide distribution rate 11.91%, CaO: 16.42%, MgO: 7.74%, Al 2 o 3 : 6.87%, SiO 2 : 18.37%, Fe 2 o 3 : 5.33%.

[0072] After the above raw ore is crushed beforehand, it is processed according to the following process steps:

[0073] (1) Ultra-fine crushing: Ultra-fine crushing of the raw ore to a particle size of 3mm, and the mass percentage of moisture is controlled at 5%;

[0074] (2) Combined screening: For the materials treated in step (1), first perform dry screening (the sieve aperture of the upper sieve is 1.2mm, and the sieve aperture of the lower sieve is 0.5mm) to separate the upper sieve with mud Coarse-grained sand, medium-grained sand with mud in the middle layer and fine-grained dry ore in the lower layer; then add concentrated ammonia into the immersion solution to the coarse-grained sand...

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Abstract

The invention discloses a method for treating copper oxide or zinc oxide ore by combining agitation ammonia leaching and percolation tank ammonia leaching. The raw ore is first ultrafinely crushed, and then a combined screening method is used to divide the material into placer ore and fine-grained slurry. , the sand ore is leached with concentrated ammonia leaching liquid in the percolation tank under sealed conditions at normal temperature and pressure, and the fine-grained slurry is leached with concentrated ammonia leaching liquid in the first stage of stirring ammonia leaching under sealed conditions at normal temperature and pressure. , and then wet grinding and grading the fine-grained ore and placer after initial leaching with medium ammonia leaching liquid, and then the ground slurry is subjected to the second stage of stirring ammonia leaching under normal temperature and pressure closed conditions. The advantages of this invention are that it not only improves the leaching rate of copper or zinc, reduces the amount of solid-liquid separation of fine-grained ores, reduces the volatilization loss of circulating ammonia, improves industrial sanitary conditions, but also has certain flexibility in the process. It can save grinding energy consumption.

Description

technical field [0001] The invention relates to a method for leaching materials with ammonia, in particular to a method for combining ammonia leaching with stirring and ammonia leaching in a percolation tank, which is used to treat refractory copper oxide ore or zinc oxide containing high alkaline gangue The ore belongs to the technical field of mineral processing. Background technique [0002] For the refractory copper oxide ore and zinc oxide ore with high alkaline gangue content, if they are treated by flotation, they will be disturbed by the slime, which will cause a large consumption of chemicals and low recovery rate; if they are treated by acid leaching, because of the acid To react with alkaline gangue, the acid consumption is too high, which is not economically cost-effective; while the normal temperature and pressure ammonia leaching method has the characteristics of good leaching selectivity, gangue does not consume chemicals, and the leaching solution has less im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/14C22B15/00C22B19/00
CPCY02P10/20
Inventor 周庆华纪翠翠马彩雯
Owner KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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