Flotation desiliconization and desulfurization method of sulfur-containing bauxite

A bauxite and desiliconization technology, applied in flotation, solid separation and other directions, can solve the problems of affecting the bauxite recovery rate, reducing the selectivity of chemicals, poor slurry dispersion performance, etc., to avoid poor dispersion performance, improve sulfur content, the effect of improving the recovery rate

Active Publication Date: 2017-10-31
ZUNYI ENERGY & MINERAL INVESTMENT CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the symbiosis relationship between sulfur-containing low-grade bauxite minerals is close, and the embedded particle size of a considerable part of the minerals is extremely fine. On the other hand, the mechanism of diaspore entrainment in the desulfurization system shows that the finer the gangue ore particles, the easier the diaspore is entrained. Fine grinding will make the dispersion performance of the pulp poor, and the specific surface area Large, the selectivity of the reagent is reduced, and a part of the bauxite (fine mud) that is easy to float is easy to float, and the circulation in the desulfurization system continues to deteriorate, which not only affects the desulfurization flotation, but also has an adverse effect on the subsequent desiliconization, but this part of the aluminum The amount of metal in earth ore is relatively large, and discarding it will directly affect the recovery rate of bauxite, resulting in higher production costs

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  • Flotation desiliconization and desulfurization method of sulfur-containing bauxite
  • Flotation desiliconization and desulfurization method of sulfur-containing bauxite

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Experimental program
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Embodiment 1

[0028] Such as figure 1 As shown, after raw ore grinding treatment, the ore powder after grinding is subjected to flotation desulfurization treatment, and the foam is scraped out to obtain coarse sulfur ore. The middle ore obtained in the second or second and third times returns to the first concentration for concentration treatment, and the foam will be obtained as sulfur concentrate; the middle ore of the first concentration is used as the desiliconization treatment step open middle ore; the bottom of the tank in the desulfurization treatment step, that is, the low-sulfur tailings is subjected to roughing, sweeping, etc., and the foam is used as sulfur concentrate, the substrate is low-sulfur tailings a, and the low-sulfur tailings Ore a is used as low-sulfur tailings a in the desiliconization treatment step; and then the open middle ore and low-sulfur tailings a are separately subjected to positive flotation desiliconization treatment, and after 1-2 times of coarseness, one...

Embodiment 2

[0041] A method for flotation desiliconization and desulfurization of sulfur-containing bauxite, comprising the following steps:

[0042] (1) Grind the raw ore through a grinder until the powder ore with a particle size of 210 mesh accounts for ≥90%, then place the powder ore in a flotation desulfurization tank, and add collectors and activators to it in sequence , foaming agent, and using a stirring speed of 100r / min stirring treatment for 30min, stop stirring, in the normal temperature environment, so that the flotation effect occurs in the flotation desulfurization tank, when there is foam on the surface of the flotation tank, the flotation The foam on the surface of the flotation cell is scraped off, and when the foam on the surface of the flotation cell no longer appears, the slurry in the bottom of the flotation cell is low-sulfur tailings; the foam scraped out is coarse sulfur ore;

[0043] (2) The rough sulfur ore obtained in step 1) is subjected to three times of bene...

Embodiment 3

[0053] A method for flotation desiliconization and desulfurization of sulfur-containing bauxite, comprising the following steps:

[0054] (1) Grind the raw ore through a grinder until the powder ore with a particle size of 200 mesh accounts for ≥90%, then place the powder ore in a flotation desulfurization tank, and add collectors and activators to it in sequence , foaming agent, and using a stirring speed of 90r / min to stir for 25min, stop stirring, in the normal temperature environment, the flotation effect occurs in the flotation desulfurization tank, when there is foam on the surface of the flotation tank, the flotation The foam on the surface of the flotation cell is scraped off, and when the foam on the surface of the flotation cell no longer appears, the slurry in the bottom of the flotation cell is low-sulfur tailings; the foam scraped out is coarse sulfur ore;

[0055] (2) The rough sulfur ore obtained in step 1) is subjected to three times of beneficiation, and after...

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Abstract

The invention relates to the technical field of desulfuration of low-grade sulfur-containing bauxite by floating, in particular to a method for desilication and desulfuration of sulfur-containing bauxite by floating. According to the method, ore grinding is carried out on raw ores to ensure that the sulfur-containing substances and gangue substances in the raw ores can sufficiently dissociate from the raw ores; and during the ore grinding process, the particle size is controlled to ensure that the ore fines, the particle size of which is between 190 meshes and 210 meshes, occupy more than 90%, so that the phenomena of poor ore pulp dispersing performance, large specific surface area, reduced chemical selectivity and fine silt (bauxite) floating are avoided. According to the method, the recovery rate of the bauxite concentrate is improved and the loss ratio of the bauxite concentrate is reduced.

Description

technical field [0001] The invention relates to the technical field of flotation desulfurization of low-grade sulfur-containing bauxite, in particular to a method for flotation desiliconization and desulfurization of sulfur-containing bauxite. Background technique [0002] At present, the desulfurization methods for sulfur-containing bauxite include reverse flotation desulfurization, conventional flotation, roasting desulfurization, magnetization treatment, microbial leaching desulfurization, and adding desulfurization compound additives in alumina production. [0003] However, when using the Bayer process to produce alumina, no matter how high or low the sulfur content in the bauxite is, it will affect the stability of the process. Therefore, desulfurization and desiliconization of sulfur-containing bauxite becomes The key to the production of alumina by the Bayer process; at the same time, ensuring the optimal removal rate of sulfur in the sulfur-containing bauxite has bec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00
Inventor 刘金海任少峰李天霞朱一民周丰周艳红周菁
Owner ZUNYI ENERGY & MINERAL INVESTMENT CO LTD
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