Method for producing polymerization cementitious material with red mud and bauxite tailings

A cementitious material and bauxite technology, applied in cement production and other directions, can solve problems such as environmental pollution and resource waste, and achieve the effects of significant economic benefits, sufficient raw materials, and good adhesion

Active Publication Date: 2012-06-13
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to address the shortcomings of the above existing technologies, to provide a low energy consumption, sufficient raw materials, large product market demand, significant economic benefits, and can solve the environmental problems caused by red mud and bauxite dressing tailings. Method for producing polymer cementitious material by using red mud and bauxite dressing tailings for pollution and resource waste problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 1000kg of dry red mud and 1000kg of dry bauxite tailings from a certain place in Henan. The molar ratio of Na, Al and Si in the mixed material is 0.2:1.0:1.7. The mixture is sintered in the rotary kiln for 0.5h, and the sintering temperature is 1000 o c. After the activated material is cooled, it is ground to -200 mesh in a ball mill. The activated material is mixed with raw gypsum powder (2% of the activated material) to obtain the product. The product has been tested by the strength of the mortar, and the compressive strength is 52MPa after 28 days of curing.

Embodiment 2

[0020] After mixing dry red mud and dry bauxite tailings from a place in Henan, the molar ratio of Na, Al, and Si elements in the mixed material is 0.3:0.8:1.5. The mixture was sintered in the experimental electric furnace for 1h, and the sintering temperature was 800 o c. After the activated material is cooled, it is ground to -200 mesh in a ball mill. The activated material is mixed with raw gypsum (1% of the activated material) to make the product. After testing, the product has a compressive strength of 54MPa after 28 days of maintenance.

Embodiment 3

[0022] Dry red mud and dry bauxite tailings were mixed from a place in Henan, and the molar ratio of Na, Al, and Si elements in the mixed material was 0.5:1.2:1.3. The mixture is sintered in a rotary kiln for 3 hours, and the sintering temperature is 700 o c. After the activated material is cooled, it is ground to -200 mesh in a ball mill. The activated material is mixed with raw gypsum (5% of the activated material) to make the product. After testing, the product has a compressive strength of 48MPa after 28 days of maintenance.

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Abstract

The invention relates to a method for producing a polymerization cementitious material through comprehensive utilization of red mud and bauxite tailing resources. The method is characterized in that the production process adopts red mud and bauxite tailings as main raw materials, which are subjected to drying, batching, high temperature activation, admixture adding, ball milling and other processes in order so as to obtain a cementitious material. After encountering water, the material undergoes a polymerization reaction and form strength. Tests show that the obtained product has the characteristics of high strength, no alkali-aggregate effect, low cost and good cohesiveness, etc. The method provided in the invention can effectively solve the environmental pollution and resource problems of red mud and bauxite.

Description

technical field [0001] The invention discloses a method for producing polymeric cementitious materials by utilizing red mud and bauxite dressing tailings, and relates to a method for producing polymeric cementitious materials by comprehensive utilization of red mud and bauxite dressing tailings resources. Background technique [0002] Red mud is a very fine-grained strong alkaline solid waste produced during the production of alumina from bauxite. China is a big producer of alumina, which produces nearly 30 million tons of red mud, with a cumulative stockpiling of 200 million tons. It is estimated that by 2015, the cumulative stockpiling of red mud will reach 350 million tons. Red mud stockpiles have brought huge economic burdens to enterprises, and at the same time caused serious environmental safety hazards. Up to now, an effective red mud utilization method has not been found at home and abroad. The comprehensive utilization rate of red mud in my country is only 4%, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24
CPCY02P40/10
Inventor 刘万超李旺兴陈湘清于延芬段光福
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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