Method for dressing, desilicication and desulfuration of sulfur-containing bauxite

A bauxite and desiliconization technology, applied in flotation, solid separation, etc., can solve problems such as complex process, achieve simple process, low cost of flotation, and shorten the process

Active Publication Date: 2011-08-17
河南华慧有色工程设计有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two-step desulfurization and desiliconization technology of sulfur-containing bauxite includes the flotation process of sulfur-containing gangue minerals and useful

Method used

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  • Method for dressing, desilicication and desulfuration of sulfur-containing bauxite
  • Method for dressing, desilicication and desulfuration of sulfur-containing bauxite
  • Method for dressing, desilicication and desulfuration of sulfur-containing bauxite

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Example Embodiment

[0017] Example 1

[0018] A low-grade sulfur-containing bauxite with an aluminum-silicon ratio of 4.4 and a sulfur content of 1.98% was used as the test sample. figure 1 The process flow shown is for flotation desulfurization and desiliconization of this low-grade sulfur-containing bauxite. First, grind the ore to a fineness of 75% -0.075mm, adjust the pH to 5.0 with sulfuric acid, add 100g / t sodium fluorosilicate, 50g / t copper sulfate, 200g / t quaternary ammonium salt, 200g throughout the process / t Butylxanthate, using eg figure 1 Flotation is carried out according to the process shown, and the obtained froth product is tailings, and the product in the tank is concentrate. The beneficiation indicators are shown in Table 1.

[0019] The flotation index of table 1 embodiment 1

[0020]

Example Embodiment

[0021] Example 2

[0022] The sulfur-containing bauxite with an aluminum-silicon ratio of 5.75, a sulfur content of 2.76%, and a calcium sulfate content of 0.5% was used as a test sample. figure 1 The process flow shown is for flotation desulfurization and desiliconization of this low-grade sulfur-containing bauxite. First, grind the ore to a fineness of 80% -0.075mm, adjust the pH to 5.0 with sulfuric acid, add 100g / t sodium fluorosilicate, 50g / t copper sulfate, 200g / t quaternary ammonium salt, 300g in the whole process / t Butylxanthate, using eg figure 1 Flotation is carried out according to the process shown, and the obtained froth product is tailings, and the product in the tank is concentrate, and the beneficiation indicators are shown in Table 2.

[0023] The flotation index of table 2 embodiment 2

[0024]

Example Embodiment

[0025] Example 3

[0026] The aluminum-silicon ratio of the sulfur-containing bauxite is 5.74. After the sulfur-containing bauxite is ground, the pH is adjusted to 3 with sulfuric acid, and the inhibitor is added sequentially. The amount of sodium hexametaphosphate is 50g / t, and the activator is The amount of copper sulfate added is 20g / t. Silicate mineral collector, the collector is dodecylamine, and the addition amount is 100g / t. The sulfur-containing gangue mineral collector is xanthate, and the addition amount is 100 g / t. Flotation is carried out after stirring and pulping; after flotation, impurity ore particles mainly composed of silicate minerals and sulfur-containing minerals float out at the same time as foam tailings. The beneficiation process is one roughing, one selection and one sweep; The pulp after flotation is used as concentrate.

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Abstract

The invention discloses a method for the dressing, desilicication and desulfuration of sulfur-containing bauxite, which relates to a method for the dressing, desilicication and desulfuration of low-quality sulfur-containing bauxite and is characterized in that: a dressing process to mill the sulfur-containing bauxite, regulate the pH to 3 to 6 by using sulfuric acid, add an inhibitor, an activator, a silicate mineral collector and a sulfur-containing gangue collector in turn, stir, perform size mixing and perform flotation; and after flotation, the silicate minerals and sulfur-containing gangue in a major part of the sulfur-containing bauxite are enriched in foam as tailings, and the ore pulp obtained after flotation is used as concentrate. When the method disclosed by the invention is used, the synchronous dressing, desulfuration and desilicication of the sulfur-containing bauxite can be realized quickly. The method has the characteristics of short flow and simple process.

Description

technical field [0001] The invention relates to an ore dressing desiliconization and desulfurization method of sulfur-containing bauxite, and relates to a method for ore dressing desiliconization and desulfurization of low-grade sulfur-containing bauxite. technical background [0002] The main sulfide minerals in my country's sulfur-bearing bauxite are pyrite (FeS 2 ) and its isomers marcasite and colloidite and gypsum CaSO 4 A class of sulfates. In alumina production, pyrite starts to react with alkali solution at 180°C, and it intensifies with the increase of temperature and alkali concentration. Marcasite, especially colloidal pyrite, is more easily decomposed by alkali solution. The reaction mechanism is: iron sulfide first decomposes into sodium disulfide, sodium disulfide is unstable in sodium aluminate solution at high temperature, then decomposes to form sodium sulfide and sodium thiosulfate, and finally oxidizes into sodium sulfate into the solution . Since sulf...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/02
Inventor 刘晰陈湘清李花霞周杰强
Owner 河南华慧有色工程设计有限公司
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