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Method for preparing magnesium oxychloride doped aluminosilicate cement from waste incineration fly ash and aluminum ash

A technology for waste incineration fly ash and aluminosilicate cement, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of few products, harmless disposal and resource utilization technology Immature, restricting the application of aluminum ash, etc., to achieve the effect of high activity

Active Publication Date: 2022-06-03
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, aluminum ash also contains a small amount of heavy metals and a certain amount of chloride, which also greatly limits the application of aluminum ash in building materials.
[0004]Whether it is waste incineration fly ash or aluminum ash, the harmless disposal and resource utilization technologies for these two hazardous wastes are currently immature. There are very few products that can be effectively promoted

Method used

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  • Method for preparing magnesium oxychloride doped aluminosilicate cement from waste incineration fly ash and aluminum ash
  • Method for preparing magnesium oxychloride doped aluminosilicate cement from waste incineration fly ash and aluminum ash
  • Method for preparing magnesium oxychloride doped aluminosilicate cement from waste incineration fly ash and aluminum ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Effects of mass ratio of high magnesium powder, waste incineration fly ash and coal gangue on the properties of prepared magnesium oxychloride mixed aluminosilicate cement

[0021] Preparation of magnesium oxychloride mixed with aluminosilicate cement: such as figure 1 As shown, according to the mass ratios 30:15:100, 30:20:100, 30:25:100, 15:30:100, 20:30:100, 25:30:100, 30:30:100, 45: 30:100, 60:30:100, 30:45:100, 45:45:100, 60:45:100, 30:60:100, 45:60:100, 60:60:100, 65:60: 100, 70:60:100, 75:60:100, 60:65:100, 60:70:100, 60:75:100 respectively weigh high magnesium powder, waste incineration fly ash and coal gangue, and mix them to obtain chlorine Magnesium oxychloride mixed with Portland cement raw meal, and ground for 3 hours to obtain fine powder of magnesium oxychloride mixed with Portland cement raw meal; weigh aluminum ash and magnesium oxychloride mixed with Portland cement in a mass ratio of 5:100 Raw meal fine powder, mix and stir evenly to obtain aluminum...

Embodiment 2

[0030] Effect of mass ratio of aluminum ash and magnesium oxychloride blended with Portland cement raw meal fine powder on the properties of prepared magnesium oxychloride blended with aluminosilicate cement

[0031] Preparation of magnesium oxychloride mixed with aluminosilicate cement: Weigh high magnesium powder, waste incineration fly ash and coal gangue according to the mass ratio of 60:60:100, and mix them to obtain magnesium oxychloride mixed with Portland cement raw meal, Grind for 7.5 hours to obtain magnesium oxychloride mixed with Portland cement raw meal fine powder; At 29:100 and 30:100, respectively weigh aluminum ash and magnesium oxychloride mixed with Portland cement raw meal fine powder, mix and stir evenly to obtain aluminum ash magnesium oxychloride mixed with Portland cement raw meal fine powder; Aluminum ash magnesium oxychloride mixed with Portland cement raw meal fine powder was blown into the low-temperature plasma discharge channel for 5.25 hours to o...

Embodiment 3

[0037] Effect of low temperature plasma discharge voltage on properties of prepared magnesium oxychloride mixed aluminosilicate cement

[0038] Preparation of magnesium oxychloride mixed with aluminosilicate cement: Weigh high magnesium powder, waste incineration fly ash and coal gangue according to the mass ratio of 60:60:100, and mix them to obtain magnesium oxychloride mixed with Portland cement raw meal, Grind for 12 hours to obtain magnesium oxychloride mixed with Portland cement raw meal fine powder; weigh aluminum ash and magnesium oxychloride mixed with Portland cement raw meal fine powder in a mass ratio of 25:100, mix and stir evenly to obtain Aluminium ash magnesium oxychloride mixed with Portland cement raw meal fine powder; the aluminum ash magnesium oxychloride mixed with Portland cement raw meal fine powder was blown into the low temperature plasma discharge channel for 1.25 hours to obtain magnesium oxychloride mixed Aluminosilicate cement, wherein the low temp...

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Abstract

The invention discloses a method for preparing magnesium oxychloride doped aluminosilicate cement from waste incineration fly ash and aluminum ash, which comprises the following steps: (1) mixing high magnesium powder, waste incineration fly ash and coal gangue to obtain a magnesium oxychloride doped Portland cement raw material, and grinding to obtain magnesium oxychloride doped Portland cement raw material fine powder; (2) mixing the aluminum ash with the magnesium oxychloride doped Portland cement raw material fine powder to obtain aluminum ash magnesium oxychloride doped Portland cement raw material fine powder; and (3) carrying out low-temperature plasma irradiation treatment on the aluminum ash and magnesium oxychloride doped silicate cement raw material fine powder to obtain the magnesium oxychloride doped aluminosilicate cement. According to the invention, efficient resource conversion and utilization of hazardous wastes are realized; the prepared magnesium oxychloride doped aluminosilicate cement is high in activity, the highest strength can reach 47 Mpa, the content of leachable heavy metal does not exceed the limit value specified in GB30760, and the content of dioxin is lower than 50 ng-TEQ / kg.

Description

technical field [0001] The invention relates to the resource recycling of solid waste, in particular to a method for preparing magnesium oxychloride mixed with aluminosilicate cement by utilizing waste incineration fly ash and aluminum ash. Background technique [0002] Domestic waste incineration fly ash is a dusty substance captured from the fluidized bed or the auxiliary flue of the grate furnace during the incineration of domestic waste for power generation. The particles are small and contain about 0.5% to 1.5% of heavy metals and trace insoluble dioxin-like toxic substances. Due to its toxic characteristics, domestic waste incineration fly ash is listed in the "National Hazardous Waste List" and belongs to a controlled hazardous waste. In addition to toxic substances, domestic waste incineration fly ash also contains 30% to 45% calcium oxide, so it is also a potential building material raw material. However, the domestic waste incineration fly ash is also enriched wi...

Claims

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Application Information

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IPC IPC(8): C04B7/32C04B7/38
CPCC04B7/32C04B7/38Y02W30/91Y02P40/10
Inventor 黄涛宋东平张树文徐娇娇
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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