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

Clean production technique for preparation of aluminium oxide and white carbon black by using high-alumina coal ash

A high-alumina fly ash, alumina technology, applied in alumina/aluminum hydroxide, silica and other directions, can solve the problems of inability to meet large-scale industrial production, large output of by-product cement, large amount of limestone, etc. The effect of high value, low process energy consumption and low processing cost

Inactive Publication Date: 2007-09-26
CHINA UNIV OF GEOSCIENCES (BEIJING)
View PDF0 Cites 60 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limestone consumption of this method is large, and sintering temperature is high, and energy consumption and cost are all very high; And CO 2 The amount of emissions is large, and the output of by-product cement is too large to meet the requirements of large-scale industrial production

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
  • Clean production technique for preparation of aluminium oxide and white carbon black by using high-alumina coal ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The clean production process for producing alumina and white carbon black by using high-aluminum fly ash mainly includes raw material pretreatment and sintering process, silicon-aluminum separation process, white carbon black production process and alumina production process. Among them, the alumina production process also includes processes such as water immersion and dissolution of aluminate solids, impurity removal of crude sodium aluminate solution, carbon decomposition of sodium aluminate solution, and aluminum hydroxide calcination. As shown in Figure 1.

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 discloses a clean producing craft of aluminum oxide and white carbon black comprehensively with high-alumina coal ash, which comprises the following steps: making sodium carbonate as raw material; disintegrating high-alumina coal ash under medium-temperature; generating acid dissoluble aluminosilicate materials; using dilute sulphuric acid to acid dip; separating aluminum oxide and silica in the high-alumina coal ash; further treating aluminous liquid part; generating hydrated alumina deposition; finishing gamma-alumina or alpha- alumina product through calcining; washing, purifying, drying; calcining the silica gel part; getting white carbon black, silica aerogel, ultra-fine silica, porous silica and so on inorganic silicide.

Description

technical field [0001] The invention relates to a new clean production process for preparing alumina and white carbon black by using high-alumina fly ash. Background technique [0002] In the past ten years, China's alumina industry has made great progress both in terms of output and production technology, but domestic alumina production has not been able to meet its consumption needs, and it still needs to rely on a large amount of imports to maintain domestic basic consumption. Currently, bauxite is the only mineral resource in alumina production in China. China's bauxite resources only account for 7.5% of the world's total, and most of them are diaspore-type ores with low aluminum-silicon ratio and poor dissolution performance. With the rapid development of China's primary aluminum industry, the demand for alumina continues to increase, resulting in a decrease in bauxite resources, which seriously hinders the sustainable development of China's aluminum industry. [0003...

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): C01F7/02C01B33/113
Inventor 马鸿文杨静王英滨王蕾丁宏娅王芳高飞
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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