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Method for preparing multi-component flocculant and co-producing composite white carbon black by using red mud

A technology of flocculant and white carbon black, which is applied in the direction of flocculation/sedimentation water/sewage treatment, silicon dioxide, silicon oxide, etc. It can solve the problems of complex process, high cost, poor implementability, etc., and achieve wide source of raw materials, flocculation Body dense and versatile effect

Active Publication Date: 2014-07-16
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods solve the problems of environmental protection and energy conservation, but there are deficiencies such as complex process, high cost, and poor implementability.

Method used

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  • Method for preparing multi-component flocculant and co-producing composite white carbon black by using red mud
  • Method for preparing multi-component flocculant and co-producing composite white carbon black by using red mud
  • Method for preparing multi-component flocculant and co-producing composite white carbon black by using red mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 25g of red mud and 75ml of 30% hydrochloric acid into a three-necked flask, stir at 100°C for 2 hours, and suction-filter to obtain the acid leaching solution and acid leaching residue; add 3g of calcium aluminate to the acid leaching solution, and stir at 60°C for 4 hours. After aging for 24 hours, the polymerized aluminum-iron flocculant was obtained; 4g of polyacrylamide, 10g of hydrated attapulgite, and 86g of polymerized aluminum-iron flocculant were mixed and reacted, and the multi-component flocculant was obtained after stirring at 50°C for 1 hour; Under drying for 6 hours, composite white carbon black was obtained. SiO in composite silica 2 The content is 70.1%; the mass percentage of each component in the multi-component flocculant is:

[0020]

Embodiment 2

[0022] Add 25g of red mud, 25ml of 30% hydrochloric acid and 25ml of 75% sulfuric acid into a three-neck flask, stir at 90°C for 2 hours, and filter with suction to obtain acid leaching solution and acid leaching residue; slowly add 60ml of NaOH (1M) solution to the rapidly stirred acid In the immersion solution, react at 75°C for 2 hours, and after aging for 24 hours, the polymerized aluminum-iron flocculant is obtained; 2g of polydimethyldiallyl ammonium chloride, 5g of bentonite, and 93g of polymerized aluminum-iron flocculant are mixed and reacted at 40°C After stirring at low temperature for 0.5h, a multi-component flocculant was obtained; the acid leaching residue was dried at 200°C for 3h to obtain composite white carbon black. SiO in composite silica 2 The content is 77.5%; the mass percentage of each component in the multi-component flocculant is:

[0023]

Embodiment 3

[0025] Add 25g of red mud and 75ml of 75% sulfuric acid into a three-necked flask, stir at 80°C for 2 hours, and suction-filter to obtain pickling solution and pickling residue; slowly add 40ml of NaOH (1M) solution to the rapidly stirring pickling solution, React at 80°C for 2 hours, then add 4g calcium aluminate, continue to react for 2 hours, and obtain polyaluminium-iron flocculant after aging for 12 hours; mix 1.5g sodium carboxymethyl cellulose, 5g sepiolite, and 93.5g polyaluminium-iron flocculant Reaction, react at 50°C for 0.5h to obtain a multi-component flocculant; dry the acid leaching residue at 250°C for 2h to obtain composite white carbon black. SiO in composite silica 2 The content is 85.0%; the mass percentage of each component in the multi-component flocculant is:

[0026]

[0027]

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Abstract

The present invention discloses a method for preparing a multi-component flocculant and co-producing composite white carbon black by using red mud, and belongs to eth field of resource utilization of red mud. The technical problem solved by the present invention is to provide a method for preparing a red mud base multi-component flocculant and co-producing composite white carbon black, wherein the method has characteristics of easily available raw material, large scale production and low cost. The technical scheme comprises: 1, carrying out acid leaching on red mud; 2, mixing the acid leaching solution and a telomer to prepare a polymerization aluminum-iron inorganic flocculant; 3, mixing the polymerization aluminum-iron inorganic flocculant, a mineral material and a polymer material to prepare a red mud base multi-component flocculant; and 4, drying the acid leaching residue obtained in the step 1 for 2-12 h at a temperature of 150-600 DEG C to prepare the composite white carbon black.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of red mud. Specifically, it relates to a method for preparing multi-element flocculants and co-producing composite white carbon black by using red mud. Background technique [0002] Red mud is the waste residue produced after extracting alumina from bauxite. Because it is mostly red, it is called red mud. According to statistics, the world's alumina industry produces more than 70 million tons of red mud every year. In 2009, China's red mud production exceeded 30 million tons, and it is increasing year by year. The red mud of foreign alumina production enterprises was originally stored by reclamation. In recent years, with the enhancement of global environmental protection awareness, the reclamation of red mud has been banned, and damming and storage has become the main discharge method. my country's alumina production enterprises are limited by geographical location. For many...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C01B33/12
Inventor 张以河陆荣荣周风山王新珂孟子霖
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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