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Method for preparing cement additive by using aluminum surface treatment solid waste as raw material

A solid waste and cement additive technology, which is applied in solid waste management, sustainable waste treatment, climate sustainability, etc. Strength and durability, effect of low heavy metal content

Active Publication Date: 2018-11-20
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since fluoride is often used as an additive in the aluminum alloy pretreatment process, the fluoride ions in the wastewater are difficult to remove, making it very difficult to recycle the fluorine-containing wastewater alkali slag in the aluminum profile industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing cement additives with aluminum surface treatment solid waste as raw material, which comprises the following specific steps:

[0025] 1) Dilute the aluminum surface treatment solid waste with 4 times its mass of tap water, add Pseudomonas seed solution with a volume ratio of 10% to it, adjust the pH of the mixed solution at 6.8, and control the temperature at 28°C. Ferment for 28 hours;

[0026] 2) adding industrial hydrochloric acid to the fermented liquid to adjust the pH of the fermented liquid to be between 2.8, and air-drying the filtered solid waste naturally, controlling its water content to about 30%, to obtain the intermediate product a;

[0027] 3) Use a ball mill to grind the intermediate product a to 300 μm, add sodium dodecylbenzenesulfonate, ferrous sulfate, and ammonium aluminum carbonate to it for primary calcination, the temperature of the primary calcination is controlled at 600°C, and the calcination time is 2, Obtain intermedia...

Embodiment 2

[0031] A method for preparing cement additives with aluminum surface treatment solid waste as raw material, which comprises the following specific steps:

[0032] 1) Dilute the aluminum surface treatment solid waste with 5 times its mass of tap water, add a Pseudomonas seed solution with a volume ratio of 15% to it, adjust the pH of the mixed solution at 7.5, and control the temperature at 30°C. Ferment for 26 hours;

[0033] 2) adding industrial hydrochloric acid to the fermented liquid to adjust the pH of the fermented liquid to be between 4.5, and air-drying the filtered solid waste naturally, controlling its water content to about 40%, to obtain the intermediate product a;

[0034] 3) Use a ball mill to grind the intermediate product a to 500 μm, add sodium dodecylbenzenesulfonate, ferrous sulfate, and ammonium aluminum carbonate to it for a primary calcination, the temperature of the primary calcination is controlled at 750° C., and the calcination time is 3 hours. Obtai...

Embodiment 3

[0038] A method for preparing cement additives with aluminum surface treatment solid waste as raw material, which comprises the following specific steps:

[0039] 1) Dilute the aluminum surface treatment solid waste by adding 5 times its mass of tap water, add Pseudomonas seed solution with a volume ratio of 10% to it, adjust the pH of the mixed solution at 7.5, and control the temperature at 28°C. Ferment for 26 hours;

[0040] 2) adding industrial hydrochloric acid to the fermented liquid to adjust the pH of the fermented liquid to be between 2.8, and air-drying the filtered solid waste naturally, controlling its water content to about 40%, to obtain the intermediate product a;

[0041] 3) Use a ball mill to grind the intermediate product a to 300 μm m, add sodium dodecylbenzenesulfonate, ferrous sulfate, and ammonium aluminum carbonate to it for primary calcination, the temperature of the primary calcination is controlled at 680°C, and the calcination time is 2.5 h, interm...

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Abstract

The present invention discloses a method for preparing a cement additive by using aluminum surface treatment solid waste as a raw material. In the prior art, the heavy metal content in the aluminum surface treatment solid waste is high so as to cause a certain safe hidden danger, and the crystal form structures and the physical and chemical properties of the final products can be affected by calcium oxide and other impurities. Based on the problems in the prior art, the present invention provides a cement additive with characteristics of environmental protection, energy saving and excellent performance, wherein the heavy metal content in the final product is significantly reduced through microbial treatment, high temperature calcination and other methods, and the aluminum surface treatment solid waste is adopted as the raw material so as to provide the high economic significance and the high environmental significance.

Description

technical field [0001] The invention relates to a method for preparing cement additives by using aluminum surface treated solid waste as a raw material, and belongs to the technical field of waste resource utilization. Background technique [0002] A large amount of colloidal waste liquid is produced during the surface treatment of aluminum profiles. In view of the characteristics of the waste liquid mainly containing various metal ions and suspended solids, neutralization adjustment and coagulation sedimentation methods are usually used to obtain waste water sludge, which can be further dehydrated. Aluminum-containing wastewater alkali slag. The alkali slag of aluminum profile industrial wastewater is extremely pure, and its main component is low-crystallization alumina hydrate. The content of aluminum oxide, hydroxide and its hydrate in the waste water alkali slag reaches more than 90%, and it has the characteristics of ultra-fine particles and high activity. Since fluor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/04C04B20/04
CPCY02W30/91
Inventor 陈东初叶秀芳张敏
Owner FOSHAN UNIVERSITY
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