Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Production method of desiliconized coal ash

A production method and technology of fly ash, applied in the removal of solid waste, alumina/aluminum hydroxide, etc., can solve the problems of complex process and high energy consumption

Active Publication Date: 2014-09-17
DATANG INT HIGH ALUMINA COAL R & D CENT
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aluminum-silicon ratio of the desiliconized fly ash produced by this method is only 2.14 at the highest; the patent CN101913615A "a method for increasing the aluminum-silicon ratio of low-grade bauxite" discloses the use of crushing and grinding, adding solid sodium carbonate Roasting activation, leaching desiliconization, carbon content, additives and water recovery and other steps, finally obtain desiliconized fly ash with a high aluminum-silicon ratio, but the process of this method is relatively complicated and has the disadvantage of high energy consumption

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
  • Production method of desiliconized coal ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] Examples 1-3 are as shown in the experiment numbers 1-3 in Table 1, and its specific production method is as described above, and each specific process parameter is shown in Table 1. With reference to the production method of the embodiment of the present invention 1-3, comparative example 4-5 is as shown in the experiment number 4-5 in table 1, and the technological process of its specific production method and each specific process parameter refer to table 1 (wherein, " -" means no such step):

[0026] Table 1

[0027]

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 production method of desiliconized coal ash. The method comprises the following steps: (1) roasting and activating coal ash; (2) after cooling the activated coal ash to the room temperature, mixing the activated coal ash with 140-160g / L sodium hydroxide for carrying out pre-desiliconization, so as to generate coal ash slurry; (3) after cooling the coal ash slurry to 70-80 DEG C, enabling the coal ash slurry to react with 100-150g / L sodium hydroxide at 70-100 DEG C, and filtering, washing and drying reaction products, so as to generate the desiliconized coal ash. By utilizing the production method, the aluminum-silicon ratio of the produced desiliconized coal ash can reach 2.3-2.5, and the production method has the advantages of simple process, low cost and high aluminum-silicon ratio.

Description

technical field [0001] The invention relates to a production method of desiliconized fly ash, which belongs to the technical field of comprehensive utilization of fly ash. Background technique [0002] Fly ash is a solid waste produced after coal combustion in the power generation industry. The discharge and dumping of a large amount of fly ash has caused great harm to the environment, so the comprehensive utilization of fly ash is extremely important. At present, the comprehensive utilization of fly ash is mainly focused on the production of alumina by using fly ash. After continuous and painstaking research by technicians in this field, three commonly used processes for extracting alumina from fly ash have been found. They are acid method, ammonium sulfate method and pre-desilication-soda lime sintering method. In the process of using fly ash to produce alumina, the fly ash is pre-desiliconized to obtain desiliconized fly ash with a high aluminum-silicon ratio as a raw ma...

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): B09B3/00B09B5/00C01F7/02
Inventor 许学斌张战军杨会宾徐鹏公彦兵
Owner DATANG INT HIGH ALUMINA COAL R & D CENT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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