Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method and system for recovering calcium and aluminum from aluminum industry sludge

A technology of aluminum industry and sludge, applied in chemical instruments and methods, sludge treatment, separation methods, etc., can solve problems such as insufficient fineness, low recovery rate, and reduced utilization value of aluminum-containing products

Pending Publication Date: 2019-04-19
KEDA INDUSTRIAL GROUP CO LTD
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing aluminum sludge resource treatment methods are not fine enough, which not only leads to a low recovery rate of aluminum, but also contains impurities such as calcium in the obtained aluminum-containing products, which greatly reduces the utilization value of aluminum-containing products

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 and system for recovering calcium and aluminum from aluminum industry sludge
  • Method and system for recovering calcium and aluminum from aluminum industry sludge
  • Method and system for recovering calcium and aluminum from aluminum industry sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Such as figure 1 Shown, the method for reclaiming calcium and aluminum from aluminum industry sludge of the present embodiment, comprises the steps:

[0064] 1. Dissolution

[0065] Crush the aluminum industry sludge until it becomes fluffy. If there is solid sludge with large hardness in the aluminum industry sludge, use a crusher to crush it.

[0066] Get 10kg of crushed aluminum industry sludge, add 20L of 2mol / L sodium hydroxide solution, and make the sodium hydroxide solution immerse the aluminum industry sludge; then, dissolve 30min at room temperature and a stirring speed of 180r / min to obtain Dissolution of calcium and aluminum.

[0067] 2. Solid-liquid separation

[0068] A polypropylene plate-and-frame filter press is used to press-filter the above-mentioned stripping liquid. The pore size of the filter medium of the polypropylene plate-and-frame filter press is 600 mesh, and the filtrate and filter residue are collected respectively; wherein, the filtrate ...

Embodiment 2

[0078] The method for reclaiming calcium and aluminum from aluminum industry sludge of the present embodiment comprises the steps:

[0079] 1. Dissolution

[0080] Crush the aluminum industry sludge until it becomes fluffy. If there is solid sludge with large hardness in the aluminum industry sludge, use a crusher to crush it.

[0081] Get 10kg of crushed aluminum industry sludge, add 20L of 3mol / L sodium hydroxide solution, and make the sodium hydroxide solution immerse the aluminum industry sludge; subsequently, dissolve 30min at room temperature and a stirring speed of 200r / min to obtain Dissolution of calcium and aluminum.

[0082] 2. Solid-liquid separation

[0083] A polypropylene plate and frame filter press is used to press filter the above dissolution liquid. The pore size of the filter medium of the polypropylene plate and frame filter press is 700 mesh, and the filtrate and filter residue are collected respectively; wherein, the filtrate is used for subsequent ele...

Embodiment 3

[0093] Such as figure 2 and Figure 4 As shown, the system for reclaiming calcium and aluminum from aluminum industry sludge of the present invention includes a dissolution device 1, which has an aluminum industry sludge inlet and an eluate outlet; the first solid-liquid separation device 2, which has an eluate inlet, Filtrate outlet and filter residue outlet, stripping liquid inlet is communicated with the stripping liquid outlet of stripping device 1; Electrodialysis device 3, it comprises cation exchange membrane 12 and anion exchange membrane 13 and has import, first outlet, second outlet and the 3rd outlet , the inlet is communicated with the filtrate outlet of the first solid-liquid separation device 2; the calcium recovery device 4 is connected with the first outlet of the electrodialysis device 3; the aluminum recovery device includes a neutralization device 5, a second solid-liquid The separation device 6 , the washing device 7 and the drying device 8 , and the neut...

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 and a system for recovering calcium and aluminum from aluminum industry sludge. The method for recovering calcium and aluminum from aluminum industry sludge comprises the following steps: 1) dissolving the aluminum industry sludge by using soluble alkali solution having a concentration of 2-3 mol / L to obtain a dissolution solution containing calcium and aluminum; 2)carrying out solid-liquid separation on the dissolution solution to obtain a filtrate containing calcium and aluminum; 3) carrying out electrodialysis on the filtrate by using a cation exchange membrane and an anion exchange membrane to respectively obtain a first mixed solution containing calcium and a second mixed solution containing aluminum; 4) recovering calcium from the first mixed solutionto obtain a calcium-containing product; and 5) adding a strong acid solution to the second mixed solution to make the pH value be 8.0-8.2, and subsequently carrying out solid-liquid separation, washing and drying to obtain an Al(OH)3 product. The method and the system have the advantages of high aluminum recovery rate, high purity of the recovered products, and significant economic, environmentaland social benefits when used to treat the aluminum industry sludge.

Description

technical field [0001] The invention relates to a treatment method for aluminum industry sludge, in particular to a method and system for recovering calcium and aluminum from aluminum industry sludge. Background technique [0002] Aluminum sludge is an industrial discharge produced during the processing of aluminum profiles. Its composition and properties are very complex. The main components include Al(OH) 3 、Al 2 o 3 , Other ingredients also include calcium, potassium, sodium and so on. At present, most of the aluminum profile factories in my country use quicklime for neutralization and then landfill directly to the aluminum industry sludge. The environmental protection pressure of enterprises has brought environmental burdens, and additionally increased processing costs, so that it is impossible to take into account the protection of the ecological environment and the sustainable use of resources. [0003] The aluminum-rich composition characteristics of aluminum indus...

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): C02F11/00C02F11/12C02F11/122C02F1/469B01D61/46C01F11/18C01F7/02C02F103/16
CPCB01D61/46C01F7/02C01F11/18C02F1/4693C02F11/00C02F11/122C02F1/441C02F2209/06C02F2103/16C02F2303/14Y02P10/20
Inventor 张道福胡长淳杨金周武桢邵俊杰
Owner KEDA INDUSTRIAL GROUP CO LTD
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com