Direct-reverse flotation process for preparing high-purity sulfur concentrate

A forward-reverse flotation, high-purity sulfur technology, applied in flotation, solid separation, etc., can solve problems such as pyrite loss and sulfide concentrate grade reduction, and achieve the effect of reducing emissions, important environmental benefits and economic benefits

Active Publication Date: 2015-08-26
BLUESTAR LEHIGH ENG INST CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the floatability of pyrite is very good, if it is slightly oxidized, elemental sulfur will be produced on the surface of pyrite, which will improve the floatability of pyrite minerals. Good pyrite is mixed into the tailings for removal of impurities, resulting in the loss of pyrite. In addition, gangue minerals such as quartz activated by metal ions and minerals with less carbonaceous inclusions cannot be cleaned in advance. Removed during the process, as the sulfur concentrate is mixed into the final concentrate by positive flotation, resulting in a decrease in the grade of the sulfur concentrate

Method used

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  • Direct-reverse flotation process for preparing high-purity sulfur concentrate

Examples

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Effect test

Embodiment 1

[0026] Embodiment 1, with reference to Fig. 1, a kind of forward and reverse flotation process of preparing high-purity sulfur concentrate, this process comprises the following steps:

[0027] (1) Grinding the pyrite raw ore to the grinding fineness required by the flotation operation;

[0028] (2) Add appropriate amount of activator, inhibitor water glass and xanthate anion collector to the ground pulp to carry out positive flotation of sulfur concentrate;

[0029] (3) The direct flotation operation undergoes one roughing, one to two sweepings, three to five beneficiations to obtain crude sulfur concentrate, and the middle ore from the sweeping and beneficiation operations returns to the previous operation step by step;

[0030] (4) Add appropriate amount of pH adjuster and strong oxidant to the crude sulfur concentrate obtained from the positive flotation operation and feed it into the regrinding operation;

[0031] (5) Add appropriate amount of cationic collector to the gr...

Embodiment 2

[0034] Example 2, in the step (1) of the forward and reverse flotation process for preparing high-purity sulfur concentrate described in Example 1: the grinding fineness is -200 mesh and the content reaches 51%-75%.

Embodiment 3

[0035] Example 3, in the step (1) of the forward and reverse flotation process for preparing high-purity sulfur concentrate described in Example 1: the grinding fineness is -200 mesh and the content reaches 60%.

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Abstract

The invention provides a direct-reverse flotation process for preparing high-purity sulfur concentrate, and belongs to the technical field of mineral machining. The process includes the following steps that 1, iron pyrite raw ore is grinded to reach the grinding fitness required by the flotation work; 2, activating agents, inhibitor sodium silicate, xanthate type anion collecting agents are added to the grinded ore pulp to conduct sulfur concentrate direct flotation work; 3, one-time rough flotation, one or two times of scavenging and three to five times of concentration are conducted in the direct flotation work to obtain rough sulfur concentrate; 4, PH regulators and strong oxidants are added to the rough sulfur concentrate, and grinding is conducted; 5, positive ion collecting agents are added to the grinded ore pulp to conduct sulfur concentrate reverse flotation work; 6, one-time rough flotation, two or three times of concentration and one or two times of scavenging are conducted in the reverse flotation work to finally obtain the qualified high-purity sulfur concentrate. The finally-obtained sulfur concentrate is high in grade, the concentrate is filtered easily, and industrialization is achieved easily.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a forward and reverse flotation process for preparing high-purity sulfur concentrate. Background technique [0002] Sulfur concentrate is one of the important chemical raw materials. It is mainly used to manufacture sulfuric acid and sulfur. The waste slag produced by acid production cannot meet the requirements of ironmaking because the iron content is less than 60%, so it can only be piled up as waste. The waste of resources has seriously polluted the environment. If the sulfur grade of sulfur concentrate is increased to more than 48% to obtain high-grade sulfur concentrate, the waste residue can be used for ironmaking and steelmaking, and can also be used to develop iron red and ferrite. Magnetic materials, liquid polyferric sulfate and other materials, finally realize the common utilization of sulfur and iron resources. [0003] It is difficult to increase the gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00
Inventor 李丰宋文义杨勇单连勇岳秋
Owner BLUESTAR LEHIGH ENG INST CO LTD
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