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Flotation method for desulfurization and desilication of high-silicon bauxite

A bauxite and high-silicon technology, applied in flotation, solid separation, etc., can solve the problems of single bauxite flotation desulfurization or desiliconization, and achieve the effects of reverse flotation desiliconization and improved utilization

Inactive Publication Date: 2012-12-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the south of Guizhou, the high-sulfur and high-silicon bauxite deposits centered on Zhijin Machang and Qingzhen Maochang, the ore aluminum-silicon ratio is 5.8-8.7, and the sulfur content is about 1%, which belongs to the medium and large bauxite belt. , with the consumption of high aluminum-silicon ratio and low-sulfur bauxite resources, the development and utilization of low-aluminum-silicon ratio and high-sulfur bauxite is imperative. At present, only a single bauxite flotation Desulfurization or desiliconization, there is no report on simultaneous flotation desulfurization or desiliconization of bauxite. In China, although Professor Zhang Qin has studied the use of flotation for simultaneous desulfurization and desiliconization, the research method is reverse Flotation desulfurization and positive flotation desiliconization, the method of positive flotation desulfurization and reverse flotation desiliconization has never been reported at home and abroad

Method used

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  • Flotation method for desulfurization and desilication of high-silicon bauxite

Examples

Experimental program
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Effect test

Embodiment 1

[0017] (1) Wet-grind 1 ton of high-silicon bauxite until the ore with a grinding fineness of 74 μm accounts for 85%, adjust the mass concentration of the pulp to 38%, and enter normal temperature positive flotation desulfurization. The whole process adopts mass concentration 3% H 2 SO 4 The solution adjusts the pulp pH to 6.5: add 50g of butyl xanthate and isopentyl xanthate, add 60g of No. 2 oil for roughing operation, remove the flotation foam of roughing, add ethyl yellow to the remaining pulp of roughing Add 80g of medicine, add 20g of No. 2 oil to enter the first sweeping operation, and return the flotation foam of the first sweep to the roughing operation, add 100g of butyl xanthate and amyl xanthate, add 80g of pine oil and rough again 15g of butyl xanthate and 20g of No. 2 oil are added to the remaining pulp of the first sweep, and then the second sweep is carried out, and the flotation foam of the second sweep is returned to the first sweep to add Add 80g of ethyl x...

Embodiment 2

[0021] (1) Wet-grind 1 ton of high-silicon bauxite until the ore with a grinding fineness of 74 μm accounts for 95%, adjust the mass concentration of the pulp to 28%, and enter normal temperature positive flotation desulfurization. The whole process adopts mass concentration 2% H 2 SO 4The solution adjusts the pulp pH to 6.0: add 150g of amyl xanthate, 40g of No. 2 oil for roughing operation, remove the flotation foam of roughing, add 60g of isopentyl xanthate, add pine Oil 60g enters the first sweeping operation, and the flotation foam of the first sweeping returns to the roughing operation to add ethyl xanthate, butyl xanthate, pentyl xanthate and isopentyl xanthate 150g, add 2 40g of No. oil was roughed again, and 40g of amyl xanthate and isopentyl xanthate were added to the remaining pulp of the first sweep, and 10g of foaming agent was added, and then the second sweep was carried out. Select foam and return to the first sweeping operation, add 60g of butyl xanthate and ...

Embodiment 3

[0025] (1) Wet-grind 1 ton of high-silicon bauxite until the ore with a grinding fineness of 74 μm accounts for 90%, adjust the mass concentration of the pulp to 30%, and enter normal temperature positive flotation desulfurization. The whole process adopts mass concentration 4% H 2 SO 4 The solution adjusts the pulp pH to 6.5: Add 100g of butyl xanthate and 80g of No. 2 oil for roughing operation. After removing the flotation foam of roughing, add 40g of butyl xanthate and No. 40g of oil enters the first sweeping operation, and the flotation foam of the first sweeping is returned to the roughing operation, adding 50g of butyl xanthate, adding 60g of No. 2 oil for roughing again, and the remaining pulp of the first sweeping After adding 20g of butyl xanthate and 30g of No. 2 oil, enter the second scavenging operation, and the flotation foam of the second scavenging returns to the first scavenging operation, add 40g of butyl xanthate, and add No. 2 oil 40g is swept again, and ...

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Abstract

The present invention provides a flotation method for desulfurization and desilication of high-silicon bauxite, which separately employs direct flotation desulfurization and reverse flotation desilication processes for simultaneous desulfurization and desilication and comprises the following steps of: firstly ball-milling high-silicon bauxite with a ball mill and then carrying out direct flotation through direct flotation desulfurization and reverse flotation desilication. The flotation reagent used in the floatation method is conducive to direct flotation desulfurization and reverse flotation desilication. When the bauxite to be floated has a sulfur content larger than 1% and an aluminum / silicon ratio larger than 5.5, the aluminum / silicon ratio of the flotation concentrate can reach morethan 10, the sulfur content in the concentrate is less than 0.3%, the recovery rate of Al2O3 is more than 80%, and the utilization of bauxite is greatly improved.

Description

technical field [0001] The invention relates to a method for desulfurizing and desiliconizing high-silicon bauxite, which belongs to the field of metallurgical ore dressing. Background technique [0002] Bauxite is the main raw material for the aluminum smelting industry, and it is also an important raw material for the production of refractory materials, advanced abrasives, high-alumina cement, ceramics and other industries. The world's bauxite resources are mainly distributed in Australia, Guinea, Brazil, Vietnam, Jamaica, India, Suriname, Indonesia, Greece and China. The ore types of bauxite in the world can be roughly divided into three basic types according to the useful mineral composition: gibbsite type, boehmite type and diaspore type. At present, gibbsite is mainly used in the production of alumina abroad, and the typical production process is the Bayer process. China's bauxite is dominated by diaspore type bauxite, and resources with an aluminum-silicon ratio of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03D1/002B03D1/004
Inventor 章晓林刘殿文方建军徐翔魏志冲徐瑾张文彬
Owner KUNMING UNIV OF SCI & TECH
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