Method for treating filter cakes of leaf filter

The technology of filter cake and filter cake of leaf filter is applied in the improvement field of alumina production process, which can solve the effect of red mud sedimentation and separation effect in a washing sedimentation tank, poor sedimentation performance of red mud, and loss of attached liquid in the last red mud washing. higher question

Inactive Publication Date: 2010-10-27
GUIZHOU BRANCH CHINA ALUMINUM IND
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the filter cake unloading of the vertical leaf filter adopts the recoil and automatic mud unloading technology of the filtered semen (caustic alkali concentration: 165g/l), this part of the high-concentration slurry enters the first red mud washing and settling tank, which is bound to Increased Na in the overflow of a red mud washing settling tank 2 The concentr

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for treating filter cakes of leaf filter
  • Method for treating filter cakes of leaf filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The method includes the following steps:

[0014] 1) Use semen to recoil to remove the filter cake;

[0015] 2) passing the filter cake and attached liquid into the filter cake tank;

[0016] 3) Use a filter cake pump to pump the filter cake and attached liquid from the filter cake tank into the diluted tank, and mix with the pulp in the diluted tank;

[0017] 4) then the mixed pulp obtained in step 3) enters the separation and settling tank for separation and settlement;

[0018] 5) The sediment obtained in step 4) enters a washing and settling tank for washing and separation.

[0019] The process flow of this method is not to directly pass the filter cake and its attached liquid to the primary washing and settling tank, but first to the post-dilution tank. Liquid loss, reducing the amount of alkali taken away with the last red mud discharge; reducing the overflow Na of a red mud washing settling tank 2 The concentration of O can reduce the amount of washing liquid...

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 treating the filter cakes of a leaf filter. At present, the flow of treating the filter cakes of the leaf filter of a Bayer process alumina refinery directly leads the filter cakes and the adherent liquid obtained by the extract backflush and automatic mud-discharging technique unloading the leaf filter to the primary red mud washing and sedimentation tank. The method affects the red mud sedimentation and separation effect of the primary washing and sedimentation tank, and increases the adherent alkali of discharge red mud. The method first leads the the filter cakes and the adherent liquid obtained by the extract backflush and automatic mud-discharging technique unloading the leaf filter to a post-dilution tank, and then carries out subsequent treatment. The invention can help to improve the sedimentation proformance of the red mud washing and sedimentation tank and reduce the loss of the adherent liquid when the red mud is washed for the last time.

Description

technical field [0001] The invention relates to the improvement of the alumina production process, in particular to a method for treating filter cake of a leaf filter. Background technique [0002] At present, the filter cake treatment process of the leaf filter of the Bayer process alumina plant (see figure 1 ) is to unload the filter cake of the leaf filter using semen recoil and automatic mud unloading technology, then pass the mixture of filter cake and attached liquid into the filter cake tank, and then use the filter cake pump to pump the mixture of filter cake and attached liquid into the mixing tank of a red mud washing and settling tank, and the ore pulp mixed in the mixing tank flows into the red mud washing and settling tank by itself for washing and sedimentation. Since the filter cake unloading of the vertical leaf filter adopts the recoil and automatic mud unloading technology of the filtered semen (caustic alkali concentration: 165g / l), this part of the high-...

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): C02F11/00
Inventor 郭恩喜郝起生季建稳郭智峰
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