Method for recycling sphalerite from separated tailings of lead-sulfur bulk concentrate

A technology for mixing concentrate and sphalerite, applied in solid separation, flotation and other directions, can solve problems such as sphalerite loss, achieve the effect of small investment, improve comprehensive utilization level, and improve economic benefits

Inactive Publication Date: 2017-04-05
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Lead-zinc sulfide ore is the main type of ore for extracting lead-zinc. The ore type is generally more complex. In addition to containing lead-zinc minerals, it also contains a relatively high content of pyrite minerals. Usually, lead-sulfur mixed separation is used to separate-re-election of zinc, Priority flotation of lead-zinc-sulfur mixed separation, full priority flotation process of lead first, then zinc and sulfur to recover the valuable metals, among which in the process of lead-sulfur mixed separation-re-election of zinc, Since sphalerite is usually embedded or symbiotic with galena and pyrite fine grains in a small amount, in this process, zinc will be enriched in the tailings of the lead-sulfur mixed concentrate separation, resulting in Part of the sphalerite is lost in the lead-sulfur mixed separation tailings

Method used

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  • Method for recycling sphalerite from separated tailings of lead-sulfur bulk concentrate

Examples

Experimental program
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Effect test

Embodiment 1

[0020] In this example, a lead-zinc ore sample in Zhaotong, Yunnan Province is taken as an example. After separation of lead and sulfur, the tailings contain 3.02% zinc, pH value is 10, and the fineness is -0.074mm, accounting for 85% fineness.

[0021] (1) First add water to the tailings of the lead-sulfur mixed concentrate separation to a mass percentage concentration of 30%.

[0022] (2) Add sulfur inhibitor lime 1500g / t, adjust the pH value of the pulp at 11; after lime action for 3 minutes, add an appropriate amount of activator copper sulfate, the dosage is 400g / t; after activator action for 3 minutes, add capture The amount of aniline as a collecting agent is 150g / t, and the amount of foaming agent 24K is 45g / t. After acting for 1min, inflate the foam to scrape out the foam, and obtain the rougher concentrate and rougher tailings.

[0023] (3) Add sulfur inhibitor lime 600g / t, activator copper sulfate 100g / t, collector aniline 70g / t, and foaming agent 24K at 25g / t to th...

Embodiment 2

[0028] In this example, a lead-zinc ore sample in Qujing, Yunnan Province is taken as an example. After the separation of lead and sulfur, the tailings contain 2.11% zinc, a pH value of 10, and a fineness of -0.074 mm, accounting for 80% of the fineness.

[0029] (1) First add water to the tailings of the lead-sulfur mixed concentrate separation to a mass percentage concentration of 32%.

[0030] (2) Add sulfur inhibitor lime 1800g / t, adjust the pH value of the pulp at 11; after 3 minutes of lime action, add an appropriate amount of activator copper sulfate, the dosage is 240g / t; after activator action for 3 minutes, add capture The amount of aniline as a collector is 120g / t, and the amount of foaming agent MIBC is 40g / t. After acting for 1min, inflate the foam to scrape out the foam, and obtain the rougher concentrate and rougher tailings.

[0031] (3) Add sulfur inhibitor lime 700g / t, activator copper sulfate 80g / t, collector aniline 60g / t, and foaming agent MIBC 20g / t to th...

Embodiment 3

[0036] In this example, a lead-zinc ore sample in Xichang, Sichuan Province is taken as an example. After separation of lead and sulfur, the tailings contain 1.62% zinc, have a pH value of 10, and have a fineness of -0.074 mm, accounting for 80% of the fineness.

[0037](1) First add water to the tailings of the lead-sulfur mixed concentrate separation to a mass percentage concentration of 35%.

[0038] (2) Add sulfur inhibitor lime 2500g / t, adjust the pH value of the pulp at 12; add an appropriate amount of activator copper sulfate, the dosage is 200g / t after lime action for 4 minutes; The amount of aniline as a collecting agent is 100g / t, and the amount of foaming agent 730 A is 35g / t. After acting for 2 minutes, inflate the foam to scrape out the foam, and obtain roughing concentrate and roughing tailings.

[0039] (3) Add sulfur inhibitor lime 1000g / t, activator copper sulfate 50g / t, collector aniline 50g / t, and foaming agent 730A at 15g / t to the roughing tailings slurry, ...

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Abstract

The invention discloses a method for recycling sphalerite from separated tailings of lead-sulfur bulk concentrate. The method for recycling the sphalerite from the separated tailings of the lead-sulfur bulk concentrate comprises the steps that firstly, water is added to the separated tailings of the lead-sulfur bulk concentrate, and the mass percent concentration of a pulp is adjusted to be 25%-32%; secondly, an appropriate amount of lime is added so that the pH value of the pulp can be adjusted, and pyrite is inhibited at the same time; thirdly, copper sulfate is added as an activating agent to activate the sphalerite; and finally, a collecting agent, aniline, and a foaming agent are added for flotation of the sphalerite, the flotation procedure comprises one-time rough flotation, two-time scavenging and three-time concentration (after the concentrate obtained through rough flotation is ground to the extent that the ores reaching the grain level of >-0.043 mm account for 90%, concentration is conducted ), and effective concentration of the sphalerite is achieved. According to the sphalerite obtained through the method, the zinc grade is higher than 40%, and the recovery rate of zinc is higher than 80%. By the adoption of the method for recycling the sphalerite from the separated tailings of the lead-sulfur bulk concentrate, the zinc lost in the lead-sulfur separated tailings, namely sulfur products, can be well recycled, the comprehensive recovery rate of zinc is improved, and the economic benefits of a concentrating plant are increased.

Description

technical field [0001] The invention belongs to the technical field of mineral separation, in particular to a method for recovering sphalerite from tailings separated from lead-sulfur mixed concentrate. Background technique [0002] As an important non-ferrous metal, zinc plays an important role in the national economy. It is mainly used in the galvanizing industry. Zinc can form alloys with many non-ferrous metals. Among them, the alloy composed of zinc, aluminum, copper, etc. is widely used in die castings; zinc and copper Brass composed of , tin, and lead is used in the machinery manufacturing industry; zinc plates containing a small amount of lead and cadmium can be made into zinc-manganese dry battery negative electrodes, printed zinc plates, powder-corroded photographic plates and offset printing plates, etc.; Fertilizers (zinc sulfate, zinc chloride) can promote plant cell respiration and carbohydrate metabolism; zinc powder, lithopone, and zinc chrome yellow can be u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03D1/018B03B1/00B03D101/02B03D101/04B03D101/06B03D103/02
CPCB03D1/00B03B1/00B03D1/018B03D2201/02B03D2201/04B03D2201/06B03D2203/02
Inventor 乔吉波刘全军梁溢强张旭东罗进王少东高连启
Owner KUNMING UNIV OF SCI & TECH
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