Method for producing aluminum oxide using industrial solid waste rich in aluminum oxide

A technology for industrial solid waste and alumina, which is applied in the comprehensive utilization of mineral resources and metallurgy to achieve the effects of mild process conditions, low free acid content, and high aluminum recovery rate

Active Publication Date: 2019-02-15
KUNMING UNIV OF SCI & TECH +1
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] To sum up, a variety of methods have been developed to solve the problem of alumina production, each with its own characteristics and advantages. However, the industrial solid waste rich in alumina is used as raw material to extract aluminum sulfate, which is then dried, carbothermally reduced, Production of alumina by alkali dissolution and species separation has not been reported yet

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 producing aluminum oxide using industrial solid waste rich in aluminum oxide
  • Method for producing aluminum oxide using industrial solid waste rich in aluminum oxide
  • Method for producing aluminum oxide using industrial solid waste rich in aluminum oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: The method for producing alumina from industrial solid waste rich in alumina is as follows:

[0040] (1) Crush the coke through a 180-mesh sieve, with a sieve allowance of less than 5%, and set aside; the coal gangue is dried, crushed, and ground until the sieve allowance of an 80-mesh sieve is less than 10%;

[0041] (2) For the first production, add water with 40% of the mass of gangue to 10kg of coal gangue, after mixing, add sulfuric acid with a mass concentration of 98% to the mixture according to 1.4 times the amount of acid used in theory, and then react at 120°C for 4 hours , after the reaction is over, add 2.6 times the mass of coal gangue to the reaction product to dissolve in water, filter to obtain acid solution and acid slag, and wash the acid slag twice with water, the amount of water is 3.0 times the mass of the aluminum-rich powder, after washing The liquids are the first washing liquid and the second washing liquid respectively, the acid s...

Embodiment 2

[0049] Embodiment 2: as figure 1 As shown, the method for producing alumina from industrial solid waste rich in alumina is as follows:

[0050] (1) Crush the anthracite through a 180-mesh sieve, with a sieve balance of less than 5%, and set aside; dry, crush, and grind the red mud until the 80-mesh sieve has a sieve balance of less than 10%;

[0051] (2) Add step 1 of Example 1 to 10 kg of ground red mud (3) Obtain the filtrate after solid-liquid separation for neutralization reaction to obtain neutralization liquid and neutralization slag, and add step 1 to the neutralization slag ( 3) Part of the three-wash liquid is mixed until the water content of the slurry is about 45wt%. The slurry is pumped into the acid-dissolving tank, and acid-dissolved with 1.1 times the amount of acid plus 98% concentrated sulfuric acid according to the theory of acid-soluble substances in red mud. Reaction, the dissolution temperature is 110°C, and the time is 4h. After the acid dissolution rea...

Embodiment 3

[0058] Embodiment 3: as figure 1 As shown, the method for producing alumina from industrial solid waste rich in alumina is as follows:

[0059] (1) Crush the semi-coke through a 180-mesh sieve, with a sieve balance of less than 5%, and set aside; the aluminum ash is dried, crushed, and ground until the sieve through an 80-mesh sieve, and the sieve balance is less than 10%;

[0060](2) Add the acid solution (filtrate) obtained in step (2) of Example 2 to 10 kg of ground aluminum ash for neutralization reaction to obtain neutralization liquid and neutralization slag, and add the neutralization slag for implementation Example 2 Step (2) Part of the five washing liquids is mixed until the water content of the slurry is about 50wt%, and the slurry is pumped into the acid-dissolving tank, and the acid content of the acid-soluble matter in aluminum ash is 1.2 times the amount of acid plus a mass concentration of 98%. Sulfuric acid was subjected to acid-dissolution reaction, the dis...

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 method for producing aluminum oxide using industrial solid waste rich in aluminum oxide, and belongs to the field of comprehensive utilization of mineral resources and metallurgy technology. The method comprises the steps of adding sulfuric acid to the industrial solid waste rich in aluminum oxide, and then performing acid dissolution, neutralization, filtration, drying,reduction, alkali dissolution, seed precipitation and calcination to produce aluminum oxide. By using the method, the comprehensive yield of aluminum oxide in the solid waste is high, the quality of the aluminum oxide product meets the requirements of lambda O-3 and above in metallurgical grade aluminum oxide standards, and the conversion rate of aluminum oxide is high; and the method can expand raw material sources and provide new ideas and technical support for aluminum oxide production.

Description

technical field [0001] The invention discloses a method for producing alumina from industrial solid waste rich in alumina, which belongs to the technical fields of comprehensive utilization of mineral resources and metallurgy. Background technique [0002] Alumina is widely used in catalyst carrier, automobile industry, chemical industry, Cutting tools and aerospace and other fields. With the rapid development of bioceramics, medical medicine, electronic technology, machinery and other industries, the market's production and demand for alumina have further increased. However, with the gradual enhancement of people's awareness of environmental protection and the shortage of resources caused by the consumption of bauxite and other contradictions have become increasingly prominent, how to solve the problems of environmental protection, resource shortage and how to prepare alumina are important issues facing scientific researchers. [0003] With the development of industrial p...

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): C01F7/26C01B33/12
CPCC01B33/12C01F7/26
Inventor 夏举佩郑光亚
Owner KUNMING UNIV OF SCI & TECH
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