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Flotation method for zinc oxide in sulphide ore tailings

A technology of sulfide ore and zinc oxide, which is applied in flotation, solid separation, etc., can solve the problems of expensive integration agent, large consumption of chemicals, and less industrial application, so as to reduce the cost of chemicals, improve the grade and recovery rate, and improve sorting effect

Active Publication Date: 2020-04-10
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From these two vulcanization processes, it can be seen that the vulcanization-xanthate flotation method has the following disadvantages: the process is more complicated, heating and activation are required, the consumption of reagents is large, and the cost of reagents is high
However, due to the high price, most of the integrants are still only in the laboratory stage, and there are few industrial applications.

Method used

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  • Flotation method for zinc oxide in sulphide ore tailings
  • Flotation method for zinc oxide in sulphide ore tailings
  • Flotation method for zinc oxide in sulphide ore tailings

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The present embodiment provides a kind of flotation method of zinc oxide in sulfide ore tailings, comprising the following steps:

[0030] S1. Take the sulfide ore tailings for crushing and then enter the ball mill for grinding. The ground material enters the spiral classification and screens out the pulp fineness less than 0.074mm, accounting for 80%. The unqualified ones are returned to the ball mill to continue grinding;

[0031] S2. Prepare a mixed solution, mix the inhibitor, regulator 1 and collector together in a certain proportion, add water and stir until completely dissolved;

[0032] The inhibitor is that sodium silicate and sodium hexametaphosphate are mixed according to the dosage ratio of 1:4, and the consumption of the sodium hexametaphosphate is 500g / t;

[0033] Described adjusting agent one is that sodium sulfide and sodium carbonate are mixed according to 1:0.4; The consumption of described sodium sulfide is 2500g / t;

[0034] Described collector is th...

Embodiment 2-5

[0039] Embodiment 2-5 provides a kind of flotation method of zinc oxide in sulfide ore tailings, compared with embodiment 1, the difference is that in step S1, the ratio of qualified pulp fineness after screening is less than 0.074mm is changed , except for the above differences, other operations are the same and will not be repeated here; the specific condition parameters and the grade and recovery rate of the zinc oxide concentrate separated by flotation are shown in the table below.

[0040] Example Proportion of pulp fineness less than 0.074mm (%) grade% Recovery rate% 1 80 46.1 92.1 2 70 44.8 88.5 3 85 46.7 92.4 4 65 40.3 85.6 5 90 47.2 92.7

[0041] It can be seen from the results in the above table that when the pulp fineness is less than 0.074mm, it accounts for 70-85%, and the recovery rate of zinc oxide in pyrite tailings basically reaches a balance. High, the recovery rate of pyrite increases with the increase o...

Embodiment 6-9

[0043] Embodiment 6-9 provides a kind of flotation method of zinc oxide in sulfide ore tailings, compared with embodiment 1, the difference is that in step S2, sodium silicate and sodium hexametaphosphate in the inhibitor are changed In addition to the above differences, other operations are the same, and will not be repeated here; the specific condition parameters and the grade and recovery of the zinc oxide concentrate separated by flotation are shown in the table below.

[0044] Example Dosage ratio grade% Recovery rate% 6 1:0 41.5 85.3 7 1:2.5 43.6 90.9 8 1:5 46.1 92.1 9 0:1 40.3 86.2

[0045] It can be seen from the results in the above table that with the increase of the dosage ratio of sodium silicate and sodium hexametaphosphate in the inhibitor, the recovery of zinc in zinc oxide concentrate first increases and then decreases. When the dosage of sodium silicate is 125g When the consumption of / t, sodium hexametaphosphate...

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Abstract

The invention discloses a flotation method for zinc oxide in sulphide ore tailings. Sodium hexametaphosphate and sodium silicate which have a remarkable inhibiting effect on gangue minerals such as quartz, calcium magnesium carbonate and magnesium silicate and slime in sulfide ore tailings are used as a combined inhibitor, and meanwhile a combined collecting agent formed by mixing CA-1, N-nitroso-benzene nuclear ammonium salt and E-5 according to the proportion of 1: (0.5-0.8): (0.2-0.5) is used. The combined collecting agent is adopted, a one-roughing, two-concentrating and one-sweeping closed-loop non-desliming direct flotation process flow is adopted, the dosage ratio of the inhibitor to the regulator in the flotation process is reasonably optimized, the flotation reagent consumption can be effectively reduced, the separation index is improved, and the recovery rate and the grade of the zinc oxide concentrate in the sulphide ore tailings are remarkably improved, so that the zinc oxide concentrate of which the zinc grade is 46.7% and the zinc recovery rate is as high as 92.4% is obtained, and efficient utilization of low-grade refractory zinc oxide ore resources in the sulphide ore tailings is realized.

Description

technical field [0001] The invention relates to the technical field of beneficiation methods for zinc oxide ore, in particular to a flotation method for zinc oxide in sulfide ore tailings. Background technique [0002] my country's zinc oxide ore resources are relatively rich, and there have been reports on the beneficiation of zinc oxide ore for a long time. Due to the high content of soluble salts and clay minerals, the current mineral processing and recovery of zinc oxide ore cannot reach a good index. The low mineral processing index has restricted the utilization of zinc oxide ore and caused a waste of zinc oxide resources. With the depletion of zinc sulfide ore resources, the processing and utilization of low-grade refractory zinc oxide ore has become extremely important. [0003] At present, the beneficiation methods of zinc oxide ore mainly include: sulfide-xanthate flotation method, sulfide-amine flotation method, anion collector direct flotation method, integration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03B1/00B03D1/018B03D103/02B03D101/06B03D101/02
CPCB03B1/00B03D1/00B03D1/018B03D2201/02B03D2201/06B03D2203/02
Inventor 戴兵刘永李向阳陈英
Owner NANHUA UNIV
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