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Arsenic removing flotation method for high-arsenic-content sulfur concentrate

A high-arsenic sulfur concentrate and flotation technology, which is applied in flotation, solid separation, etc., can solve the problems of difficulty in sulfur extraction and arsenic reduction, complex mineral composition, etc., and achieve the effects of low cost, environmental friendliness, and reduction of arsenic emissions

Inactive Publication Date: 2018-06-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the continuous development and consumption of mine resources, the mineral composition is becoming more and more complex, and it is more difficult to extract sulfur and reduce arsenic. At present, no one has studied the production of low-grade, high-arsenic sulfur concentrate (the mass fraction of arsenic is 3%~7%) Flotation method

Method used

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  • Arsenic removing flotation method for high-arsenic-content sulfur concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: This example takes a high-arsenic-sulfur concentrate in Mengzi, Yunnan as the object. The high-arsenic-sulfur concentrate contains 5.28% arsenic, 37.11% sulfur, 0.38% lead, 0.25% zinc, and 0.05% copper , of which arsenic oxide occupies 0.63%, and arsenic sulfide occupies 99.37%; arsenic sulfide mainly exists in the form of arsenopyrite, and pyrrhotite is mainly pyrrhotite and pyrite;

[0019] A method for flotation of high-arsenic sulfur concentrate to remove arsenic, the specific steps are as follows:

[0020] (1) At a stirring speed of 300 r / min, add water and sodium carbonate to the high-arsenic sulfur concentrate to adjust the slurry until the pH of the slurry is 10 and the concentration of the slurry is 20%;

[0021] (2) Put the pulp obtained in step (1) into a ball mill for ball milling until the mineral particle size in the pulp is -0.037mm and the content is 90.85%;

[0022] (3) Add the roughing agent to the ore slurry obtained in step (2), mix evenl...

Embodiment 2

[0027] Example 2: This example takes a certain high-arsenic sulfur concentrate in Gejiu, Yunnan Province as the object. The high-arsenic sulfur concentrate contains 4.55% arsenic, 39.7% sulfur, 0.51% lead, 0.62% zinc, and 0.02% copper. Among them, the occupation rate of arsenic oxide is 0.4%, and the occupation rate of arsenic sulfide is 99.6%.

[0028] A method for flotation of high-arsenic sulfur concentrate to remove arsenic, the specific steps are as follows:

[0029] (1) At a stirring speed of 250 r / min, add water and sodium carbonate to the high-arsenic sulfur concentrate to adjust the slurry until the pH of the slurry is 11 and the concentration of the slurry is 15%;

[0030] (2) Put the pulp obtained in step (1) into a ball mill for ball milling until the mineral particle size in the pulp is -0.037mm and the content is 93.4%;

[0031] (3) Add the roughing agent to the ore slurry obtained in step (2), mix evenly under the condition of stirring speed of 200 r / min, and p...

Embodiment 3

[0036] Example 3: In this example, a high-arsenic-sulfur concentrate in Ordos, Inner Mongolia is used as the object. The high-arsenic-sulfur concentrate contains 3.26% arsenic, 37.5% sulfur, 0.42% lead, 0.37% zinc, and 0.24% copper. Among them, the occupation rate of arsenic oxide is 1.63%, and the occupation rate of arsenic sulfide is 98.37%.

[0037] A method for flotation of high-arsenic sulfur concentrate to remove arsenic, the specific steps are as follows:

[0038] (1) At a stirring speed of 220 r / min, add water and sodium carbonate to the high-arsenic sulfur concentrate to adjust the slurry until the pH of the slurry is 9 and the concentration of the slurry is 18%;

[0039] (2) Put the pulp obtained in step (1) into a ball mill for ball milling until the mineral particle size in the pulp is -0.037mm and the content is 91.2%;

[0040] (3) Add the roughing agent to the ore slurry obtained in step (2), mix evenly under the condition of stirring speed of 300 r / min, and per...

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Abstract

The invention discloses an arsenic removing flotation method for high-arsenic-content sulfur concentrate, and belongs to the technical field of beneficiation. The arsenic removing flotation method comprises the steps that water and sodium carbonate are added into the high-arsenic-content sulfur concentrate for pulp mixing; ball milling is conducted on concentrate pulp; a rough flotation chemical agent is added into the milled concentrate pulp to be uniformly mixed, first-time rough flotation is conducted for 3-5 min, and rough flotation concentrate and rough flotation tailings are obtained; first-time concentration is conducted on the rough flotation concentrate for 2-4 min, and low-arsenic-content sulfur concentrate and first-time concentration tailings are obtained; a first-time scavenging flotation chemical agent is added into the rough flotation tailings to be uniformly mixed, first-time scavenging flotation is conducted for 3-5 min, and first-time scavenging flotation concentrateand first-time scavenging flotation tailings are obtained; the first-time scavenging flotation concentrate and the first-time concentration tailings are mixed, and first-time rough flotation is conducted; a second-time scavenging flotation chemical agent is added into the first-time scavenging flotation tailings to be uniformly mixed, second-time scavenging flotation is conducted for 2-4 min, andsecond-time scavenging flotation concentrate and second-time scavenging flotation tailings are obtained; and the second-time scavenging flotation concentrate is returned for first-time scavenging flotation. According to the method, the content of arsenic in the sulfur concentrate can be decreased, and resources such as arsenic and sulfur can be recycled.

Description

technical field [0001] The invention relates to a flotation method for removing arsenic from a high-arsenic sulfur concentrate and belongs to the technical field of mineral processing. Background technique [0002] Arsenic element symbol As, located in the 4th period of the periodic table, group VA, atomic number 33, is a metalloid element and also belongs to rare metals. Arsenic exists widely in nature, and hundreds of arsenic minerals have been discovered, but most of them coexist with other non-ferrous metal minerals. There are mainly two types of arsenic in nature. One is the element form composed of mineral molecules, which is the main form of arsenic. The main minerals are arsenopyrite, arsenite, and tetrahedrite; the other is isomorphic or adsorbed A dispersed state in the form of ions. [0003] Among the associated minerals with 80% of the total resource reserves in my country, pyrite is the most common associated mineral. In the associated ore deposits, arsenopyri...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D103/02
CPCB03D1/00B03D2203/02
Inventor 梁远琴刘全军余力赵刘闯念家飞
Owner KUNMING UNIV OF SCI & TECH
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