Stripping process for high iron diaspore bauxite

A bauxite and hydraulic technology, which is applied in the dissolution field of high-speed iron-diaspore bauxite, can solve the problems of low resource utilization rate, high energy consumption, difficult to effectively enrich iron, etc., and achieve the utilization of resources. The effect of high efficiency, high resource utilization rate, and easy comprehensive utilization

Inactive Publication Date: 2008-10-22
GUIZHOU BRANCH CHINA ALUMINUM IND
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this part of the dissolved red mud is not recycled, it will cause a large loss of alkali and reduce the utilization rate of the ore; if it is recycled, it needs to be treated with a sintering method with high energy consumption, which will reduce the energy consumption of the en

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] in lye N k Under the condition of 300g / L, add lime and high iron bauxite (Fe 2 o 3 content is 18%), the amount of lime added is according to C / S (CaO and SiO 2 The mass ratio) is 2.0, the reaction temperature is 150°C, and the reaction time is 2 hours. After the treatment, the liquid-solid separation is carried out, and a certain amount of circulating mother liquor is added to the solid, and the dissolution is carried out at a temperature of 260°C for 45 minutes to dissolve the red mud. The ratio of aluminum to silicon is 0.73, and the ratio of sodium to silicon is 0.08.

Embodiment 2

[0020] in lye N k Under the condition of 200g / L, add lime and high iron bauxite (Fe 2 o 3 Content is 16%), the amount of lime added is according to C / S (CaO and SiO 2 The mass ratio) is 2.5, the reaction temperature is 140°C, and the reaction time is 2 hours. After the treatment, the liquid-solid separation is carried out, and a certain amount of circulating mother liquor is added to the solid, and the dissolution is carried out at a temperature of 260°C for 60 minutes to dissolve the red mud. The ratio of aluminum to silicon is 0.44, and the ratio of sodium to silicon is 0.04.

Embodiment 3

[0022] in lye N k Under the condition of 400g / L, add lime and high iron bauxite (Fe 2 o 3 Content is 16%), the amount of lime added is according to C / S (CaO and SiO 2 The mass ratio) is 3.0, the reaction temperature is 80°C, and the reaction time is 12 hours. After the treatment, the liquid-solid separation is carried out, and a certain amount of circulating mother liquor is added to the solid, and the dissolution is carried out at a temperature of 280°C for 30 minutes to dissolve the red mud. The ratio of aluminum to silicon is 0.54, and the ratio of sodium to silicon is 0.03.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method for dissolving out ferric diaspore type bauxite and relates to the method for dissolving out the bauxite in an alumina producing process. The method is characterized in that in the process, preprocessing alkali solution and lime CaO are used for preprocessing the ferric diaspore type bauxite; then solid-liquid separation is carried out, the separated solid is dissolved out under dissolving-out condition by normal Bayer process; the used preprocessing alkali solution is added with the lime to remove alumina in the solution, so as to realize the regeneration of the preprocessing alkali solution. In the method of the invention, only the lime is used as an additive, therefore the method has simple procedures and the ratio of aluminum and silicon (A/S) and the ratio of natrium and silicon (N/S) in the dissolved-out red mud are obviously reduced, which is applicable to processing the diaspore type bauxite with high content of ferric oxide (the content of the Fe2O3 is more than or equal to 8 percent).

Description

technical field [0001] The invention discloses a method for dissolving high-iron diaspore type bauxite, and relates to a method for dissolving bauxite in the production process of alumina. Background technique [0002] In the process of alumina production, Fe in the ore 2 o 3 Content ≥ 8% is called high-iron bauxite, due to the high iron content, the process of processing is difficult. At present, the Bayer method is generally used in the treatment of high-iron diaspore bauxite, but usually, the aluminum-silicon ratio A / S of the dissolved red mud is 1.3-2.0, and the sodium-silicon ratio N / S is about 0.5. If this part of the dissolved red mud is not recycled, it will cause a large loss of alkali and reduce the utilization rate of the ore; if it is recycled, it needs to be treated with a sintering method with high energy consumption, which will reduce the energy consumption of the entire production process. raised. The utilization rate of resources is low, iron in red mud ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01F7/02
Inventor 李新华尹中林顾松青
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap