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Comprehensive treatment method and system for red mud resource utilization

A comprehensive treatment and resource recovery technology, applied in the field of resource utilization of industrial waste residues, can solve problems such as inability to realize industrialization promotion, poor industrial applicability, and unsatisfactory effects, and achieve cost reduction, simple process methods and equipment, and high returns. high effect

Pending Publication Date: 2020-06-23
彭思尧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors found that the existing treatment process often has the characteristics of high treatment cost, high energy consumption, complicated process, poor industrial applicability, and unsatisfactory effect.
As a result, many research results on the utilization of red mud cannot realize industrial promotion

Method used

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  • Comprehensive treatment method and system for red mud resource utilization
  • Comprehensive treatment method and system for red mud resource utilization
  • Comprehensive treatment method and system for red mud resource utilization

Examples

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Effect test

Embodiment 1

[0061] A comprehensive treatment system for resource utilization of red mud. The comprehensive treatment system includes an externally heated rotary kiln. The reaction device is provided with a viewing window, so that operators can observe the reaction conditions in the reaction device. The comprehensive treatment system can also include a red mud pretreatment device and a red mud feeding device, and the red mud pretreatment device includes a dehydration drying device and a crushing device connected in sequence; wherein, the dehydration drying device is a heating Rotary kiln drying. The red mud feeding device is a vacuum displacement feeding device, and the red mud that has been dehydrated, dried and crushed (controlling the red mud particle size to be less than 300 microns, and 74 microns or less accounts for 80%) is sent to the vacuum displacement feeding device, and then The reaction device is input through the pipeline to prevent the external oxygen and other gases from en...

Embodiment 2

[0070] A comprehensive treatment system for resource utilization of red mud, the comprehensive treatment system includes a reaction device that is a high-temperature gas fluidized bed. The reaction device is provided with an object window, so that it is convenient for the operator to observe the reaction situation in the reaction device. The comprehensive treatment system may also include a red mud pretreatment device and a red mud feeding device, and the red mud pretreatment device includes a dehydration drying device and a crushing device connected in sequence; wherein, the dehydration drying device may be Heating and drying rotary kiln. The red mud feeding device is a vacuum displacement feeding device, and the dehydrated, dried and crushed red mud (the particle size of the red mud is controlled to be less than 300 microns, and 74 microns or less accounts for 80%) is sent to the vacuum displacement feeding device, Then it is fed into the reaction device through the pipelin...

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Abstract

The invention provides a comprehensive treatment method and system for red mud resource utilization, and belongs to the technical field of industrial waste residue resource utilization. According to the method, dried and heated red mud is directly and fully contacted with reducing gas and reacts with reducing gas; ferric oxide in the red mud is reduced into ferroferric oxide, ferroferric oxide isrecovered through magnetic separation, the remaining dry red mud can be directly processed to prepare cement or used for further separation of other metals, the technological process is simple and convenient, and the method has a good practical application value, especially large-scale industrialization value and industrialization application value.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of industrial waste residues, and in particular relates to a comprehensive treatment method and system for resource utilization of red mud. 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] Red mud is a very fine-grained strong alkaline solid waste produced during the production of alumina from bauxite. It is red because it contains a large amount of iron oxide, so it is called red mud. The output of red mud depends on the ore Taste, production method, technical level vary. Most production plants produce 0.8-1.5 tons of red mud for every 1 ton of alumina produced. With the annual in...

Claims

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Application Information

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IPC IPC(8): C01G49/08C04B7/24C21B3/04
CPCC01G49/08C04B7/24C21B3/04Y02W30/50Y02P10/20Y02P40/10
Inventor 彭思尧彭禹舜梁应铭
Owner 彭思尧
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