Process of using sulphur lead-zinc containing tailings to prepare sulphur iron ore concentrate

A technology of tailings and concentrates, applied in the direction of sulfur trioxide/sulfuric acid, chemical instruments and methods, wet separation, etc., to achieve the effects of reduced environmental impact, not easy to oxidize, and significant economic benefits

Inactive Publication Date: 2009-10-07
KUNMING UNIV OF SCI & TECH +1
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Problems solved by technology

[0006] Kunming Yimingxing Mining and Metallurgy Equipment Co., Ltd. and Kunming University of Science and Technology invented the production method of high-iron and low-sulfur pyrite slag in 2004 and obtained the invention patent authorization (patent number:

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  • Process of using sulphur lead-zinc containing tailings to prepare sulphur iron ore concentrate

Examples

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Effect test

Embodiment 1

[0019] Example 1. The tailings after flotation of lead and zinc in a lead-zinc ore dressing plant contain 7.50% sulfur and 10.82% iron. The sulfur-containing minerals are mainly pyrite and pyrrhotite, and the iron-containing minerals are mainly pyrite , pyrrhotite and a small amount of magnetite. Use a sieving machine to screen out the +0.15mm particle size, and the products under the sieve are pre-selected by a drum magnetic separator after pulping in a mixing tank, and the iron content is 50.30%, the sulfur content is 41.50%, the iron recovery rate is 42.16%, and the sulfur recovery rate is 35.68%. Magnetic separation of pyrite concentrate. The magnetic separation tailings contain 38% mud, and the spiral chute is used to remove the mud and throw the tails. The coarse concentrate is mixed with a mixing tank for flotation, and 2500g / t sulfuric acid is added to adjust the pH of the slurry to 5.5. 60g / t of terpineol oil was added as a foaming agent. After one roughing, two swee...

Embodiment 2

[0020] Example 2. The tailings after flotation of lead and zinc in a lead-zinc ore dressing plant contain an average of 12.80% sulfur and 11.18% iron. The sulfur-containing minerals are mainly pyrite, and the iron-containing minerals are also pyrite and pyrrhotite and the total amount of magnetite <1%. Due to the long storage time, the surface of pyrite minerals may be oxidized. Grind the tailings with a φ2100×2700 ball mill. The mud content of the product after grinding is 26%. Use a mixing tank to adjust the slurry and then carry out flotation. Add 3200g / t sulfuric acid to adjust the pH of the slurry to 5.5. Add butyl yellow 200g / t of pine oil, 80g / t of pine alcohol oil was added, and after two times of roughing, three times of sweeping and five times of beneficiation, 48.62% of sulfur, 42.47% of iron, 90.89% of sulfur and iron mixed grades were obtained, sulfur and iron The recovery rate of the pyrite concentrate is 88.87%, and the sulfur content of the final tailings afte...

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Abstract

The objective of the invention is to provide a process of using sulphur lead-zinc containing tailings to prepare sulphur iron ore concentrate, using magnet-floating combination process or magnet-gravity-floating combination process to produce sulphur iron ore concentrate containing more than 90% sulphur and iron, using the sulphur iron ore concentrate to produce sulphuric acid, getting 98% sulphuric acid of national standard while getting iron ore concentrate power containing more than 60% iron, and sulphur in the tailings is reduced to less than 2%, recovery rate of sulphur iron in ore concentrate is more than 86%. The invention make comprehensive recovery and use of sulphur iron in the lead-zinc tailings.

Description

1. Technical field [0001] The invention relates to a method for preparing pyrite concentrate by using sulfur-containing lead-zinc tailings, belonging to the technical field of mineral processing. 2. Background technology [0002] my country is a country rich in lead-zinc ore resources, and most of the mines are associated with valuable metals such as pyrite, pyrrhotite, and magnetite or hematite. Due to the low value of sulfur and iron ore relative to lead and zinc metals, many lead and zinc concentrators do not comprehensively recycle the associated sulfur and iron ore. When some lead-zinc concentrators adopt the mixed flotation process, they only produce sulfur concentrate containing lead and zinc in the separation stage of lead and sulfur or the separation stage of sulfur and zinc as by-product recovery, while the sulfur and iron in the tailings There is basically no recycling, and it is directly stored in the tailings. Concentrators across the country process up to ten...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03C1/00B03B1/00B03D1/012C01B17/69B03D101/02B03D101/04
Inventor 周兴龙文书明吴谊民季清武
Owner KUNMING UNIV OF SCI & TECH
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