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Method for preparing microcrystalline glass by synergetically processing municipal sludge through utilizing metallurgical slag

A technology of glass-ceramics and synergistic processing, applied in the fields of resource utilization and environmental protection, achieving significant economic and social benefits, simple preparation process, and low manufacturing cost

Inactive Publication Date: 2012-06-13
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Municipal municipal sludge is the solid waste discharged from urban domestic sewage treatment plants after multiple treatments of recycled sewage. Most of it is used for agricultural composting, but it contains a large amount of organic matter, heavy metal elements and germs, etc., which will bring a lot of problems in the past. Serious environmental and social problems

Method used

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  • Method for preparing microcrystalline glass by synergetically processing municipal sludge through utilizing metallurgical slag
  • Method for preparing microcrystalline glass by synergetically processing municipal sludge through utilizing metallurgical slag
  • Method for preparing microcrystalline glass by synergetically processing municipal sludge through utilizing metallurgical slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The sludge discharged from a sewage treatment plant was placed in a heating furnace and calcined at 700°C for 2 hours. The color of the sludge changed from black to light yellow. After cooling, it was taken out and ground to less than 1mm; after chemical composition analysis, the results (wt% )as follows:

[0019] Raw material CaO SiO 2 al 2 o 3 MgOSO 3 Fe 2 o 3 TiO 2 K 2 O Na 2 OP 2 o 5

[0020] Sludge incineration ash 8.32 41.27 13.05 5.72 1.53 6.01 0.80 4.19 0.97 17.49

[0021] The blast furnace slag of a steel plant was finely ground to less than 1mm, and the chemical composition analysis results (wt%) were as follows:

[0022] Raw material CaO SiO 2 al 2 o 3 MgOSO 3 Fe 2 o 3 TiO 2 K 2 o

[0023] Metallurgical blast furnace slag 42.21 31.40 11.73 8.70 2.61 1.30 0.69 0.45

[0024] Sludge incineration ash and metallurgical blast furnace slag are weighed and mixed uniformly according to the mass percentage: sludge incinerat...

Embodiment 2

[0030] The incineration of sludge, the treatment of blast furnace slag and the chemical composition are the same as in Example 1.

[0031] Raw materials are proportioned by mass percentage: 41% of sludge incineration ash, 55% of metallurgical blast furnace slag, and 4% of quartz sand. Concrete technological process and technological parameter are with embodiment 1.

[0032] According to relevant standards, after testing, its performance indicators are as follows:

[0033]

Embodiment 3

[0035] The incineration and chemical composition of sludge are with embodiment 1;

[0036] The steel slag of a steel plant is finely ground to less than 1mm, and the chemical composition analysis results (wt%) are as follows:

[0037] Raw material CaO SiO 2 al 2 o 3 MgOSO 3 Fe 2 o 3 TiO 2 K 2 O Na 2 OP 2 o 5

[0038] Metallurgical steel slag 44.81 16.69 2.04 5.62 0.29 24.05 0.77 0.06 0.93 2.01

[0039] Sludge incineration ash and metallurgical steel slag are weighed according to the mass percentage: sludge incineration ash 37%, metallurgical steel slag 42%, and quartz sand 21%. Mix them evenly, put them into a graphite crucible, and melt at 1400 ° C for 2 hour, take out the molten mixed glass liquid and carry out water quenching treatment to obtain basic glass granules;

[0040] Finely grind the prepared basic glass granules to 200 meshes, press them into shape, put them into a heating furnace for nucleation and crystallization treatment, heat up to 90...

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Abstract

The invention which relates to a method for preparing microcrystalline glass by synergetically processing municipal sludge through utilizing metallurgical slag belongs to the technical field of resource utilization and environment protection. The method is characterized in that the microcrystalline glass is prepared from main raw materials of two solid wastes of sludge burning ash and the metallurgical slag without other nucleating agents, fluxing agents, and the like. The microcrystalline glass concretely comprises, by mass, 30-65% of the sludge burning ash, 35-60% of the metallurgical slag, and 0-25% of a component regulator. The method of the invention, which treats municipal sludge and the metallurgical slag as the main raw materials and fully utilizes complementation characteristics of components and physicochemical properties of the sludge and the metallurgical slag, transmits heavy metal elements in the sludge and the metallurgical slag into beneficial nucleating agents and fluxing agents, needs no other additives, and substantially reduce the cost in the manufacturing process of the microcrystalline glass; and the method has the advantages of simple preparation process, low manufacturing cost, and possessing of substantial economic and social benefits.

Description

technical field [0001] The invention relates to a method for preparing glass-ceramic by co-processing municipal sludge with metallurgical slag, and belongs to the technical field of resource utilization and environmental protection. Background technique [0002] As a new generation of building decoration materials, glass-ceramic has the advantages of hard texture, high bending strength, high compressive strength, strong impact resistance, excellent thermal stability, no water absorption, acid and alkali resistance, etc. Building materials such as granite and granite have better performance and lower cost, which is the development direction of new building materials in the future. [0003] Recently, scientific research on glass-ceramics has developed rapidly. In order to solve the problem of high raw material costs in the production process of glass-ceramics, combined with the development requirements of comprehensive utilization of resources, a variety of industrial solid wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00
Inventor 李宇樊涌张玲玲周贵友苍大强
Owner UNIV OF SCI & TECH BEIJING
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