A preparation method of carbonized modified red mud ceramsite adsorbent and its regeneration method and application

A technology of red clay ceramsite and adsorbent, applied in chemical instruments and methods, separation methods, filter regeneration, etc., can solve problems such as insufficient adsorption performance of red clay ceramsite

Active Publication Date: 2021-07-06
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ceramsite is a well-developed new building material at present. Because its internal structure is characterized by fine and dense honeycomb micropores, light weight, high strength, and good adsorption, the preparation of ceramsite from red mud is a current research hotspot in red mud treatment. However, In the case of unmodified, the adsorption performance of red mud ceramsite still has some deficiencies.

Method used

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  • A preparation method of carbonized modified red mud ceramsite adsorbent and its regeneration method and application
  • A preparation method of carbonized modified red mud ceramsite adsorbent and its regeneration method and application

Examples

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Effect test

no. 1 example

[0025] A kind of preparation of carbonized modified red mud ceramsite adsorbent comprises the following steps:

[0026] (1) Prepare Bayer process red mud into ceramsite with a particle size of about 1-1.5 cm, place it in an oven, and dry it at 100°C for 12 hours;

[0027] (2) Put the dried red mud ceramsite in a carbonization kettle, and use carbon dioxide with a purity of 99.9% as carbonization gas. The pressure in the carbonization kettle is 1 MPa, the humidity is 30%, the temperature is 50 ° C, and the time is 2 hours; after the carbonization is completed Then dry at 100°C for 12 hours to obtain modified red mud ceramsite.

no. 2 example

[0029] A kind of preparation of carbonized modified red mud ceramsite adsorbent comprises the following steps:

[0030] (1) Prepare Bayer red mud into ceramsite with a particle size of about 1-1.5 cm, place it in an oven, and dry it at 120 ° C for 10 h;

[0031] (2) Place the dried red mud ceramsite in a carbonization kettle, and use carbon dioxide with a purity of 99.9% as carbonization gas. The pressure in the carbonization kettle is 1MPa, the humidity is 60%, the temperature is 100°C, and the time is 2h; after the carbonization is completed Then dry at 120°C for 10 hours to obtain modified red mud ceramsite.

no. 3 example

[0033] A kind of preparation of carbonized modified red mud ceramsite adsorbent comprises the following steps:

[0034] (1) Prepare Bayer process red mud into ceramsite with a particle size of about 1-1.5 cm, place it in an oven, and dry it at 110°C for 12 hours;

[0035] (2) Place the dried red mud ceramsite in a carbonization kettle, and use carbon dioxide with a purity of 99.9% as carbonization gas. The pressure in the carbonization kettle is 2MPa, humidity is 60%, temperature is 50°C, and time is 4h; after carbonization is completed Then dry at 110°C for 12 hours to obtain modified red mud ceramsite.

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Abstract

The invention relates to the technical field of red mud ceramsite adsorbent, in particular to a preparation method of carbonized modified red mud ceramsite adsorbent, a regeneration method and application thereof. The preparation method comprises: drying the red mud ceramsite, then performing carbonization treatment under the conditions of set temperature, humidity and pressure, and drying again after completion, to obtain the final product. The regeneration method includes: after the carbonized modified red mud ceramsite adsorbent has treated the sewage, mixing the adsorbent, calcium oxide, and water, and calcifying the adsorbent under stirring conditions, and then filtering out The adsorbent is washed with clean water, and then carbonized under the set temperature, humidity and pressure conditions, and then dried again after completion. The invention can significantly improve the adsorption performance of the red mud ceramsite by carbonizing and modifying the ceramsite. Moreover, the regeneration method of first calcification and then carbonization treatment can effectively realize the regeneration of the red mud ceramsite adsorbent, so that the adsorbent can be reused.

Description

technical field [0001] The invention relates to the technical field of red mud ceramsite adsorbent, in particular to a preparation method of carbonized modified red mud ceramsite adsorbent, a regeneration method and application thereof. 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 industrial solid waste from industrial aluminum production. Generally, for every ton of alumina produced, 1 to 1.5 tons of red mud is incidentally produced. According to incomplete statistics, the annual discharge of red mud in my country is as high as tens of millions of tons, and the cumulative storage of more than tens of millions of tons has been accumulated. The utilization r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10B01J20/34B01J20/30C02F101/20C02F101/30
CPCB01J20/041B01J20/06B01J20/08B01J20/103B01J20/34B01J20/3475B01J2220/4887C02F2101/20C02F2101/30
Inventor 李召峰王孜健林春金孟祥龙陈晨刘超
Owner SHANDONG UNIV
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