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Heating floatation method for middling pulp in zinc oxide ore

A zinc oxide ore and flotation technology, which is applied in flotation, solid separation and other directions, can solve the problems of closed-circuit operation of sludge deterioration, difficulty in dispersing the sludge, and large amount of sodium sulfide, etc. The effect of improving beneficiation efficiency

Inactive Publication Date: 2015-11-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the problems that the middle ore is difficult to handle, the pH of the middle ore pulp is low, the amount of sodium sulfide is too large, the sludge is deteriorated, the closed-circuit operation is difficult to disperse, and the like in the separation process of zinc oxide ore.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The present embodiment takes Baoshan zinc oxide ore as an ore sample, and specifically comprises the following steps:

[0024] (1) Take 500g of Baoshan zinc oxide ore as the raw ore sample. The Zn grade of the raw ore is 7.83wt%. The Baoshan zinc oxide ore is crushed to below -2mm for grinding. The grinding fineness is -0.074mm and the content accounts for 92.38%. The mine carries out one rough, two fine and two sweeping open-circuit processes, and the roughing agent is the regulator sodium carbonate 2kg / t, the dispersant sodium hexametaphosphate 2kg / t, the activator Na 2 S10kg / t and collector octadecylamine 300g / t, no chemicals were added during the beneficiation process, no sodium carbonate and sodium hexametaphosphate were added during the sweeping process, and the activator Na 2 S2kg / t, the collector octadecylamine is halved, and the reagents in the subsequent sweeping process are halved sequentially;

[0025] (2) Merge the twice-selected tailings obtained in step ...

Embodiment 2

[0029] The present embodiment takes Tengchong zinc oxide ore as an ore sample, and specifically comprises the following steps:

[0030] (1) Take 500g of Tengchong zinc oxide ore as the raw ore sample, the Zn grade of the raw ore is 6.65wt%, crush the Tengchong zinc oxide ore to below -2mm and grind the ore, the grinding fineness is -0.074mm and the content accounts for 90.41%. The mine carries out one rough, two fine and three sweeping open-circuit processes, and the roughing agent is the regulator sodium carbonate 2kg / t, the dispersant sodium hexametaphosphate 1.5kg / t, the activator Na 2 S8kg / t and collector KZF2kg / t, no chemicals were added during the beneficiation process, no sodium carbonate and sodium hexametaphosphate were added during the sweeping process, and the activator Na 2 S2kg / t, the collector KZF is halved, and the reagents in the subsequent scanning process are halved sequentially;

[0031] (2) Combine the twice-selected tailings obtained in step (1) and the t...

Embodiment 3

[0035] Present embodiment takes Guilin zinc oxide ore as ore sample, specifically comprises the following steps:

[0036] (1) Take 500g of Guilin zinc oxide ore as the raw ore sample, the Zn grade of the raw ore is 8.05wt%, crush the Guilin zinc oxide ore to be below -2mm and grind the ore, the grinding fineness is -0.074mm and the content accounts for 95.67%. The mine carries out one rough, two fine and two sweeping open-circuit processes, and the roughing agent is the regulator sodium carbonate 2kg / t, the dispersant sodium hexametaphosphate 2kg / t, the activator Na 2 S12kg / t and collector KZF2kg / t, no chemicals were added during the beneficiation process, no sodium carbonate and sodium hexametaphosphate were added during the sweeping process, and the activator Na 2 S3kg / t, the collector KZF is halved, and the reagents in the subsequent scanning process are halved in turn;

[0037] (2) Combine the twice-selected tailings obtained in step (1) and the twice-scavenged concentrat...

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Abstract

The invention relates to a heating floatation method for middling pulp in zinc oxide ore and belongs to the technical field of ore processing. After raw ore of the zinc oxide ore is broken and ground, a conventional floatation method is used for conducting an open-circuit test, and therefore concentrates, middlings and tailings are obtained; the obtained middlings are merged; the mass percentage concentration of the pulp is adjusted to be 20%-40%; the pulp is heated to 40-60 DEG C; then, Na2S activating agents are added in sequence so that the pH of the pulp can reach 11-11.5; collecting agents and foaming agents in a conventional floatation process are used for conventional floatation, and therefore concentrates and tailings are obtained; and the obtained concentrates and the concentrates obtained through the open-circuit test are merged, and final zinc concentrates meeting the index requirement are obtained through preparation. According to the heating floatation method, the problems that the middlings in the zinc oxide ore separation process are hard to process, the pH of the middling pulp is low, the use amount of sodium sulfide is too large, closed-circuit work deteriorates due to sludge, and the sludge is hard to scatter are solved.

Description

technical field [0001] The invention relates to a heating flotation method for ore pulp in zinc oxide ore, which belongs to the technical field of mineral processing. Background technique [0002] The material composition of zinc oxide ore is complex, including a large amount of soluble salts such as gypsum, copper sulfate, zinc sulfate, and other carbonates, sulfates, silicates, arsenates and other oxides, sulfides ; There is also a large amount of ochre and lead alum produced in the oxidation process, which is very easy to muddy, making the flotation operation difficult to control and affecting the flotation index. In order to achieve the final selection index of zinc oxide ore, multiple selections and sweeps are often used to improve the concentrate grade and recovery rate. However, because the medium ore contains a large amount of flotation reagents and the slurry has a high mud content, it is difficult to separate and recover the flotation. Therefore, how to deal with ...

Claims

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Application Information

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IPC IPC(8): B03D1/00
Inventor 冉金城刘全军张治国邓荣东李涤非宋超
Owner KUNMING UNIV OF SCI & TECH
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