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Method for producing geopolymer cement mortar through red mud and bauxite tailing

A cement mortar and geopolymer technology, applied in cement production, solid waste management, sustainable waste treatment, etc., can solve problems such as environmental pollution and safety hazards, waste of resources, land occupation, etc., and achieve low energy consumption and low cost Effect

Inactive Publication Date: 2018-11-02
鄢金松
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of red mud is piled up, which not only occupies land, wastes resources, but also easily causes environmental pollution and safety hazards

Method used

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  • Method for producing geopolymer cement mortar through red mud and bauxite tailing
  • Method for producing geopolymer cement mortar through red mud and bauxite tailing
  • Method for producing geopolymer cement mortar through red mud and bauxite tailing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for producing geopolymer cement mortar from red mud and bauxite beneficiation tailings, the components and contents of the geopolymer cement mortar are:

[0029]

[0030]

[0031] According to above-mentioned components and content thereof, the preparation steps of this geopolymer cement mortar are:

[0032] The first step is to add caustic soda to Bayer process red mud, sintering process red mud, and bauxite beneficiation tailings, mechanically stir for 10-15 minutes, and then dry ball mill in a ball mill for 25-35 minutes to obtain ball abrasives ;

[0033] The second step is to put the ball abrasive into a medium-temperature kiln for modification, and the modification temperature is 600-650°C; keep it warm for 2-3 hours to prepare the modified material;

[0034] The third step is to cool the modified material at room temperature, then add steel slag powder and silicon powder to it, and then stir for 10 to 15 minutes to obtain a mixed material;

[003...

Embodiment 2

[0039] A method for producing geopolymer cement mortar from red mud and bauxite beneficiation tailings, the components and contents of the geopolymer cement mortar are:

[0040]

[0041] According to above-mentioned components and content thereof, the preparation steps of this geopolymer cement mortar are:

[0042] The first step is to add caustic soda to Bayer process red mud, sintering process red mud and bauxite beneficiation tailings, add caustic soda, mechanically stir for 10 to 15 minutes, and then dry ball mill in a ball mill for 25 to 35 minutes to produce get ball abrasive;

[0043] The second step is to put the ball abrasive into a medium-temperature kiln for modification, and the modification temperature is 550-600°C; keep the temperature for 2-3 hours to obtain the modified material;

[0044] The third step is to cool the modified material at room temperature, then add steel slag powder and silicon powder to it, and then stir for 10 to 15 minutes to obtain a mi...

Embodiment 3

[0049] A method for producing geopolymer cement mortar from red mud and bauxite beneficiation tailings, the components and contents of the geopolymer cement mortar are:

[0050]

[0051] According to above-mentioned components and content thereof, the preparation steps of this geopolymer cement mortar are:

[0052] The first step is to add caustic alkali to Bayer process red mud, sintering process red mud and bauxite beneficiation tailings, mechanically stir for 10-15 minutes, and then dry ball mill in a ball mill for 25-35 minutes to obtain ball abrasive ;

[0053] The second step is to put the ball abrasive into a medium-temperature kiln for modification, and the modification temperature is 500-550°C; keep the temperature for 2-3 hours to obtain the modified material;

[0054] The third step is to cool the modified material at room temperature, then add steel slag powder and silicon powder to it, and then stir for 10 to 15 minutes to obtain a mixed material;

[0055] Th...

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Abstract

The invention discloses a method for producing geopolymer cement mortar through red mud and bauxite tailing. The geopolymer cement mortar is prepared from the following components: 30 to 55 wt percentof bayer red mud; 10 to 15 wt percent of sintered red mud; 15 to 20 wt percent of bauxite tailing; 15 to 25 wt percent of ground steel slag; 32 to 35 wt percent of sands; 4 to 6 wt percent of causticalkali; 8 to 16 wt percent of silicon powder. The method comprises the following steps: adding the caustic alkali into the bayer red mud, the sintered red mud and the bauxite tailing, and laying thematerials into a ball mill, so as to form a ball milling material; laying the ball milling material into a moderate temperature furnace to perform modification, so as to form a modified material; adding the ground steel slag and the silicon powder into the modified material, so as to form a mixture; laying the mixture into the ball mill, so as to form red mud and bauxite tailing geopolymer cement;uniformly mixing the geopolymer cement and the sands, adding water, and grouting while stirring. The geopolymer cement mortar has a wide flow range, forms hard paste, does not cause alkali-aggregatereaction, and belongs to a novel green building material with low cost and high performance.

Description

[technical field] [0001] The invention belongs to the technical field of comprehensive utilization of non-ferrous metallurgical chemical industry, environmental protection building materials and industrial waste residue, and relates to Bayer process red mud, sintering process red mud and bauxite discharged from production processes of Bayer process alumina and sintering process alumina in aluminum industry production enterprises Comprehensive utilization method of beneficiation tailings. Specifically, a method for producing geopolymer cement mortar from red mud and bauxite beneficiation tailings is prepared by using Bayer process red mud, sintering process red mud and bauxite beneficiation tailings as raw materials. [Background technique] [0002] At present, in the field of nonferrous metallurgy industry, the Bayer process and sintering process or the series (mixed connection) of the two processes are still used to produce alumina. [0003] Bauxite beneficiation is to solv...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/12C04B18/04
CPCC04B18/0409C04B18/12C04B28/006C04B2201/50C04B18/142C04B14/06C04B22/062C04B18/146Y02P40/10Y02W30/91
Inventor 鄢金松
Owner 鄢金松
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