Ionic curing agent and red mud fly ash gel material

A technology of cementitious materials and curing agents, applied in cement production, etc., can solve the problem of large amount of curing agents, and achieve the effects of easy operation, low price and simple process

Active Publication Date: 2018-09-11
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of the curing agent is relatively large, and there is no Na in the solidified red mud + Ability

Method used

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  • Ionic curing agent and red mud fly ash gel material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The present embodiment provides a kind of ion curing agent, and described ion curing agent comprises layered double metal hydroxide: 25g, ammonium chloride 25g.

[0023] This embodiment also provides a red mud fly ash cementitious material, the raw material is 12kg of red mud, 6kg of fly ash, 1kg of desulfurized gypsum, 1kg of lime, 50g of ion curing agent (25g of layered double metal hydroxide, chlorinated Ammonium 25g), the required amount of water is 4.53kg.

[0024] The preparation steps of the red mud fly ash cementitious material are as follows:

[0025] a. All solid raw materials are added to the mixer according to the proportion and mixed evenly.

[0026] b. Weigh 0.25% ionic curing agent with the total content of solid raw materials and add it in the form of external mixing and mix evenly.

[0027] c. Add water in proportion to the evenly mixed dry ingredients, and then fully stir evenly.

Embodiment 2

[0029] The present embodiment provides a kind of ion curing agent, and described ion curing agent comprises layered double metal hydroxide: 30g, ammonium chloride 20g.

[0030] This embodiment also provides a red mud fly ash cementitious material, the raw material is red mud 12kg, fly ash 6kg, desulfurization gypsum 1kg, lime 1kg, ion curing agent 50g (layered double metal hydroxide 30g, chlorinated ammonium 20g), the required amount of water is 4.57kg.

[0031] The preparation steps of the red mud fly ash cementitious material are as follows:

[0032] a. All solid raw materials are added to the mixer according to the proportion and mixed evenly.

[0033] b. Weigh 0.25% ionic curing agent with the total content of solid raw materials and add it in the form of external mixing and mix evenly.

[0034] c. Add water in proportion to the evenly mixed dry ingredients, and then fully stir evenly.

Embodiment 3

[0036] The present embodiment provides a kind of ion curing agent, and described ion curing agent comprises layered double metal hydroxide: 60g, ammonium chloride 40g.

[0037] This embodiment also provides a red mud fly ash cementitious material. The raw materials are 12kg red mud, 6kg fly ash, 1kg desulfurized gypsum, 1kg lime, 100g ion curing agent (60g layered double metal hydroxide, chlorinated ammonium 40g), the required amount of water is 4.57kg.

[0038] The preparation steps of the red mud fly ash cementitious material are as follows:

[0039] a. All solid raw materials are added to the mixer according to the proportion and mixed evenly.

[0040] b. Weigh 0.5% ion curing agent with the total content of solid raw materials and add it in the form of external mixing and mix evenly.

[0041] c. Add water in proportion to the evenly mixed dry ingredients, and then fully stir evenly.

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Abstract

The invention discloses an ionic curing agent used for a red mud fly ash gel material. The material mainly consists of layered double metal hydroxide and ammonium chloride. The volume weight is 1170 kg / m3-1230 kg / m3. The percentage of the layered double metal hydroxide in the total content of the ionic curing agent is 50%-60%. The percentage of the ammonium chloride in the total content of the ionic curing agent is 40%-50%. 0.25-0.5% of the ionic curing agent is added into the red mud fly ash gel material after mixing the ionic curing agent with a percentage of the total content. The dissolution amount of Na+ ions and harmful ions (Na, Cu, Pb, Cr, As) of hardened gel material can be reduced. The risk of environmental pollution can be eliminated. The usage field of industrial wastes such asred mud can be widened.

Description

technical field [0001] The invention relates to the technical field of industrial solid waste treatment, in particular to an ion curing agent and red mud fly ash gelling material. Background technique [0002] With the rapid development of alumina industry, red mud discharge and its hazards are becoming more and more serious. Red mud is the most important solid waste in the aluminum industry. It is the solid waste left after alumina is produced from bauxite through a series of physical and chemical reactions. It is named for its red appearance. In my country, about 1.0-1.8 tons of red mud are discharged for every ton of alumina produced. It is estimated that my country's aluminum industry discharges about 60 million tons of red mud every year. So far, there is no effective treatment method for these red muds. Dam building and stockpiling is the main discharge method of red mud. However, the construction of red mud stockpiles not only occupies a large amount of land, but a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/14
CPCC04B7/14C04B7/243Y02P40/10
Inventor 陈伟杨腾飞陈潇
Owner WUHAN UNIV OF TECH
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