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Bauxite tail piling method

A technology for bauxite and tailings, which is applied in the field of storage of bauxite beneficiation tailings, can solve the problems of difficulty in drying and consolidation, occupying land resources, affecting the safety of tailings ponds, etc., achieving considerable and environmental benefits and improving Concentration of paste and considerable social benefits

Active Publication Date: 2009-08-26
中铝中州铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] (1) The stacking angle of bauxite beneficiation tailings is less than 2°, the stockpiling volume is large, and a large amount of land resources are occupied;
[0012] (2) After long-term wet storage of bauxite beneficiation tailings in the tailings pond, a large amount of water still remains in the pores, which is extremely viscous and soft in shape, difficult to dry and consolidate, and cannot form a stable hardened accumulation, seriously affecting Tailings pond safety
[0013] (3) The residual beneficiation agents in the bauxite beneficiation tailings pollute the groundwater
[0014] With the continuous operation of Bayer process industrial production of bauxite beneficiation, the conventional wet dam storage method makes the storage capacity of bauxite beneficiation tailings continue to increase, the dam body of tailings pond continues to increase, and its operating costs increase , increased safety hazards, and intensified environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The bauxite beneficiation tailings with a weight concentration of 45.5% are mixed with dry fly ash and ordinary Portland cement. The amount of fly ash added is 33.3% of the weight of dry tailings, and the amount of added ordinary Portland cement is 3%, stirring to form a paste with a weight concentration of 52.7%, the slump of the paste is 22cm, the paste is pumped into the tailings stockyard, and condensed to form a stockpile with a certain accumulation angle and a certain strength. Storage stacking angle 22

[0052] The 28-day compressive strength of the stockpiled test block is 1.5MPa.

Embodiment 2

[0054] Bauxite beneficiation tailings with a weight concentration of 40.2%, mixed with dry fly ash and lime, the amount of fly ash added is 50% of the dry tailings weight, and the amount of lime added is 5% of the dry tailings weight, and the weight concentration is formed by stirring 51.2% of the paste, the slump of the paste is 23.5cm, the paste is pumped into the tailings stockyard, and condensed to form a certain accumulation body with a certain accumulation angle. After testing, the accumulation angle of the accumulation body is 18°, The 28-day compressive strength of the stockpiled test block is 1.1MPa.

Embodiment 3

[0056] Bauxite beneficiation tailings with a weight concentration of 40.2%, mixed with dry fly ash and water glass, the amount of fly ash added is 10% of the dry tailings weight, the amount of water glass added is 10% of the dry tailings weight, and stirred to form For the paste with a weight concentration of 42.5%, the slump of the paste is 27cm. The paste is discharged into the tailings yard by self-flow through a pipeline, and condenses to form a deposit with a certain accumulation angle and a certain strength. After testing, the accumulation angle of the accumulation body is 6 °, the 28-day compressive strength of the stockpile test block is 1.3MPa. .

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Abstract

The bauxite tail piling method features that the bauxite tail pulp in 20-70 wt% concentration is first mixed with base material in 10-70 wt% of dry bauxite tail and agglomeration excitant in 0-15 wt% of dry bauxite tail through stirring to form paste in 30-85 wt% concentration; and then piled in bauxite tail storing yard to form piled body in certain piling angle and strength. The said method can raise the safety of bauxite tail piling, reduce environmental pollution and save land for bauxite tail piling.

Description

technical field [0001] The invention relates to a method for stockpiling bauxite dressing tailings, which relates to a method for treating tailings in a bauxite dressing process for producing alumina, in particular to a method for stockpiling mineral dressing tailings. Background technique [0002] The type of bauxite in my country is mainly diaspore bauxite, which has the characteristics of high aluminum, high silicon, and medium-low aluminum-silicon ratio. For diaspore-type bauxite, the technology of producing alumina by hybrid method and sintering method is mostly used in industry, which requires large investment, complicated process and high energy consumption. [0003] In recent years, in order to economically and rationally utilize my country's medium and low aluminum-silicon ratio bauxite resources, the grade of bauxite is improved through beneficiation and desiliconization, and then the economical Bayer process is used for alumina production. The energy-saving and ec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B5/00
Inventor 王永红赵东锋刘伟王二星刘焦萍黄春成李太昌郭刚吴长河孟杰李国华程旭郭东峰李国兵陆维和薛玉兰娄东民赵越赵永久
Owner 中铝中州铝业有限公司