Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for controlling quality of polyaluminum ferric chloride product produced from aluminum ash

A polyaluminum ferric chloride, product quality technology, applied in aluminum chloride, chemical instruments and methods, aluminum halide, etc., can solve problems such as environmental pollution, aluminum ash troubles aluminum processing enterprises, and restricts the development of aluminum processing industry, and achieves The effect of expanding the application field

Active Publication Date: 2021-05-28
河南省睿博环境工程技术有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the primary aluminum ash and secondary aluminum ash waste slag after the extraction of metal aluminum was stored in the industry. The aluminum nitride in the aluminum ash will decompose ammonia gas after being damp in the air, and the smell is unpleasant and toxic. cause serious pollution to the environment
This will not only cause waste of aluminum resources but also bring environmental problems
[0003] 2. After aluminum ash is listed as hazardous waste, the disposal of aluminum ash has become a major problem for aluminum processing enterprises, restricting the further development of aluminum processing industry
[0004] 3. Aluminum ash contains AlN, heavy metals, etc., which will directly or indirectly cause harm to the environment, and direct disposal will cause environmental pollution
When producing polyaluminum chloride / polyaluminum ferric chloride from aluminum ash, it is easy to cause the nitrogen, fluorine, heavy metals, and COD of the produced products to exceed the standard. Although the national standard does not require other indicators except heavy metals, it can be determined that aluminum When polyaluminum ferric chloride produced from ash is used as a water treatment agent, if the nitrogen, fluorine, heavy metals, and COD in the polyaluminum ferric chloride exceed the standard, the nitrogen, fluorine, heavy metal, and COD in the finished product water after treatment will also exceed the standard, directly affecting water treatment. The effect of using the agent
The above situation has greatly limited the development and industrial application of polyaluminum ferric chloride produced by aluminum ash

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

[0024] Take the aluminum ash of a company in Xichuan, Nanyang as an example: its main chemical composition is Al 2 o 3 34.87%, AlN 1.74%, Al0.66%, F1.21%, Fe 2 o 3 2.17%, SiO 2 9.10%, Cl2.19%, heavy metal (calculated as Pb) 50ppm, organic matter 1.36%, moisture 19.03%.

[0025] 1000kg of the above-mentioned aluminum ash is processed according to the technical scheme through harmless treatment, acidolysis, purification, removal of COD, alkalization, polymerization, and slaking to obtain 1470kg of solid polyaluminum ferric chloride with an alumina content of 28.5%. The basicity of the product is 74.26%, the heavy metal content is 10ppm, the COD is 50mg / L, and the ammonia nitrogen (calculated as N) is 0.005%, which is better than the HGT 5359-2018 standard.

Embodiment 2

[0027] Take the aluminum ash of a company in Baoding, Hebei as an example: its main chemical composition is Al 2 o 3 (Total) 72.24%, AlN 6.56%, Al4.27%, F0.43%, Fe 2 o 3 1.63%, SiO 2 6.70%, Cl2.86%, heavy metal (calculated as Pb) 100ppm, organic matter 0.91%, moisture 5.78%.

[0028] 1000kg of the above-mentioned aluminum ashes are processed according to the technical scheme through harmless treatment, acidolysis, purification, removal of COD, alkalization, polymerization, and slaking to obtain 7700kg of liquid polyaluminum ferric chloride with an alumina content of 8.6%. The basicity of the product is 69.75%, the heavy metal content is 5ppm, the COD is 13mg / L, and the ammonia nitrogen (calculated as N) is 20mg / L, which is better than the HGT 5359-2018 standard.

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 controlling the quality of a polyaluminum ferric chloride product produced from aluminum ash. The aluminum ash is subjected to a harmless treatment process, and after reaction, filtering is conducted to obtain purified aluminum ash and a solution containing fluorine and chlorine. According to the invention, after the reaction is finished, filtering is conducted to obtain the purified aluminum ash and the solution containing fluorine and chlorine; the aluminum ash can be used for producing an inorganic flocculant, namely polyaluminum ferric chloride, and the ammonium nitrogen content, the heavy metal content and the COD index of the polyaluminum ferric chloride product can be effectively controlled; and product quality meets the use requirements of the water treatment industry, the pollution of the aluminum ash to the environment is eliminated, and the secondary pollution of the produced polyaluminum ferric chloride to the water body in the use process can be avoided.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for controlling the quality of polyaluminum ferric chloride produced from aluminum ash. Background technique [0002] 1. Aluminum ash is the solid waste residue produced during aluminum smelting and processing. It is usually divided into primary aluminum ash and secondary aluminum ash according to different sources. Its main chemical composition is Al, Al 2 o 3 , SiO 2 , AlN, MgO, NH 3 , CaO, and also contains trace amounts of F, Cl, heavy metals, etc. In the past, the primary aluminum ash and secondary aluminum ash waste slag after the extraction of metal aluminum was stored in the industry. The aluminum nitride in the aluminum ash will decompose ammonia gas after being damp in the air, and the smell is unpleasant and toxic. Cause greater pollution to the environment. This will not only cause waste of aluminum resources but also bring ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56C02F1/52
CPCC01F7/56C02F1/5245Y02P10/20
Inventor 王林波赵书展赵岩王云龙
Owner 河南省睿博环境工程技术有限公司