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

Red mud-based ferrate mixture soil remediation agent as well as preparation method and application thereof

A soil remediation agent and ferrate technology, which is applied in the field of soil remediation agent preparation, can solve the problems of rising construction cost, alumina production cost, land occupation, waste of resources, etc., and achieve the advantages of saving iron resources, increasing efficiency, and reducing toxic effects. Effect

Active Publication Date: 2021-03-09
SHANDONG UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2010, the annual output of red mud in my country was about 30 million tons. As of 2015, the cumulative accumulation of red mud has reached 350 million tons, causing great environmental pollution and waste of resources.
A huge amount of red mud is mainly stored in the open air, which takes up a lot of land
In addition, the construction cost and maintenance cost of red mud storage yard also cause the increase of alumina production cost

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
  • Red mud-based ferrate mixture soil remediation agent as well as preparation method and application thereof
  • Red mud-based ferrate mixture soil remediation agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] In a first aspect, the present invention provides a method for preparing a red mud-based ferrate mixture soil remediation agent, comprising the steps of:

[0027] Mix and grind the dried red mud and alkali metal peroxide in proportion;

[0028] The mixed solid powder is calcined to prepare the red mud-based ferrate mixture soil repair agent.

[0029] In the aluminum industry, the red mud, the waste discharged after extracting alumina from bauxite, contains about 10% of valuable iron elements, and most of its occurrence forms are Fe 2 o 3 , a small amount of FeO is present. Fe contained in red mud 2 o 3 As a raw material, it is mixed with an alkali metal peroxide and calcined to obtain a red mud-based ferrate mixture soil remediation agent through a thermochemical oxidation method.

[0030] The reaction mechanism is: red mud (Fe 2 o 3 )+Na 2 o 2 →Na 2 FeO 4 +Na 2 O.

[0031] In some embodiments, the moisture content of the dried red mud is less than 0.1%.

...

Embodiment 1

[0049] Take by weighing 8.992g of the waste red mud of the aluminum making industry, put it into a tube furnace and close it, and feed it into a flow rate of 100ml / min. 2 Dry at 180°C for 1 hour, quickly weigh 8.679g after cooling, and quickly weigh 8.690g according to the mass ratio of 1:1 (considering the loss caused by the transfer process) Na 2 o 2 Mix it with the dried red mud, stir and grind it fully so that there are no obvious lumps in the mixture, quickly put it into the tube furnace and close it, and pass in O at a flow rate of 200ml / min. 2 The temperature was raised to 700° C. at a rate of 6° C. / min and then calcined for 1 hour. After the reaction was completed, the product was taken out after the tube furnace was cooled to room temperature, sealed and stored, and a small amount of product was taken to analyze its phase composition by XRD. The results were as follows: figure 2 As shown, the curves from bottom to top are the XRD patterns of the red mud, the produc...

Embodiment 2

[0051] Compared with Example 1, the heating rate of calcination was 5° C. / min, and the others were the same as Example 1. Ferrate (Na 2 FeO 3 and Na 4 FeO 5 ) content is about 7.7%, of which Na 4 FeO 5 The content is about 3.5%.

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 red mud-based ferrate mixture soil remediation agent as well as a preparation method and application thereof and a preparation method. The preparation method comprises the following steps: mixing dried red mud with alkali metal peroxide in proportion, and grinding; and calcining the uniformly mixed solid powder to obtain the red mud-based ferrate mixture soil remediationagent. The characteristics of ferrate and the characteristics of red mud are combined, the red mud is used as a raw material, alkali metal oxide is added, ferric oxide contained in the red mud is converted into ferrate with high oxidability through a ferrate thermochemical oxidation method, and the red mud-based ferrate mixture soil remediation agent is prepared and used for soil improvement and remediation. And good soil remediation and improvement effects can be achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of soil remediation agents, in particular to a red mud-based ferrate mixture soil remediation agent and its preparation method and application, in particular to a method of extracting alumina from bauxite in the aluminum industry and then discharging it The waste red mud is used as a raw material, and the red mud-based ferrate mixture soil remediation agent is prepared by a thermochemical oxidation method. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] At present, the soil pollution situation in my country is not optimistic. The soil pollution of cultivated land is serious, and the rate of...

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): C09K17/02B09C1/08A01B79/02C01G49/00C09K109/00
CPCC09K17/02B09C1/08A01B79/02C01G49/0081C01G49/0027C09K2109/00B09C2101/00
Inventor 赵希强周兴王文龙宋占龙孙静毛岩鹏
Owner SHANDONG UNIV
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