Process and complete equipment for producing porous ceramsite from construction waste

A technology for construction waste and complete sets of equipment, applied in the field of solid waste resource utilization, can solve problems such as land occupation, random stacking, and environmental hazards.

Inactive Publication Date: 2010-12-15
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the current situation of large amount of abandoned construction waste in my country, random stacking, land occupation, prominent environmental hazards, and difficulty in recycling, and uses construction waste as raw material to produce high-quality porous ceramsite in conjunction with a ...

Method used

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  • Process and complete equipment for producing porous ceramsite from construction waste
  • Process and complete equipment for producing porous ceramsite from construction waste

Examples

Experimental program
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Effect test

Embodiment 1

[0013] A process for producing high-performance porous ceramsite from construction waste, specifically comprising the following steps:

[0014] (1) Pretreatment: Sorting steel bars, wood, plastics, aluminum alloys and other metals in construction waste and disposing of them as renewable resources, and then disposing of the remaining bricks, sandstones, decorative tiles, glass fragments, miscellaneous soil, etc. Crushing in the jaw crusher, sieve the broken material with 2mm, and return the oversized material to the crusher for further processing.

[0015] (2) Mixing and granulation process: transfer the undersize material to an externally heated rotary heating furnace for heat treatment at 450°C for 30 minutes, transfer the heat-treated raw materials to a ball mill, and perform ball milling for 45 minutes at a ball mill speed of 300 rpm / Minute. Add 20% pore-forming agent into the ball mill, and the pore-forming agent is produced by a patented waste straw preparation method. ...

Embodiment 2

[0019] A process for producing high-performance porous ceramsite from construction waste, specifically comprising the following steps:

[0020] (1) Pretreatment: Sorting steel bars, wood, plastics, aluminum alloys and other metals in construction waste and disposing of them as renewable resources, and then disposing of the remaining bricks, sandstones, decorative tiles, glass fragments, miscellaneous soil, etc. Crushing in the jaw crusher, sieve the broken material with 2mm, and return the oversized material to the crusher for further processing.

[0021] (2) Mixing and granulation process: Transfer the undersieve to an externally heated rotary heating furnace for heat treatment at 550°C for 60 minutes, transfer the heat-treated raw materials to a ball mill, and ball mill for 60 minutes at a speed of 400 rpm / Minute. Add 50% pore-forming agent into the ball mill, and the pore-forming agent is produced by a patented waste straw preparation method. Continue to dry mix in the b...

Embodiment 3

[0025] A process for producing high-performance porous ceramsite from construction waste, specifically comprising the following steps:

[0026] (1) Pretreatment: Sorting steel bars, wood, plastics, aluminum alloys and other metals in construction waste and disposing of them as renewable resources, and then disposing of the remaining bricks, sandstones, decorative tiles, glass fragments, miscellaneous soil, etc. Crushing in the jaw crusher, sieve the broken material with 2mm, and return the oversized material to the crusher for further processing.

[0027] (2) Mixing and granulation process: Transfer the under-sieve material to an externally heated rotary heating furnace for heat treatment at 500°C for 45 minutes, transfer the heat-treated raw materials to a ball mill, and ball mill for 50 minutes at a ball mill speed of 350 rpm / Minute. Add 40% pore-forming agent into the ball mill, and the pore-forming agent is produced by a patented waste straw preparation method. Continue...

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Abstract

The invention provides a process and complete equipment for producing high-performance porous ceramsite from construction waste, which aims at solving the existing conditions that abandoned construction waste in China has a large output, occupies too much land, causes too much harm to the environment and is difficult to recycle. The invention is characterized in that special pretreatment, compounding, granulating, heat treatment and shaping procedures are established on the basis of composition characteristics of the construction waste. By controlling the preparation, the introducing mode and the addition of a pore forming agent and adopting appropriate heat treatment equipment, the invention establishes pertinent heating-up, thermal insulation and cooling systems to produce high-quality ceramsite. The produced ceramsite is mainly used as a biological film carrier in a sewage treatment plant, a filler in an odor treatment trickling filter, a filler of a light-weight high-strength construction material and a thermal and sound insulation material.

Description

technical field [0001] The invention relates to the treatment and disposal of construction waste, which belongs to the new technology of resource utilization of solid waste in the field of environmental protection and resource comprehensive utilization, and is especially suitable for the pollution control and high value-added resource utilization of a large amount of construction waste generated in the process of urban reconstruction. The prepared ceramsite is mainly used as biofilm carrier in sewage treatment plant, filler in trickling filter for odor treatment, filler in light and high-strength building materials and thermal insulation and sound insulation material. Background technique [0002] With the rapid development of the country's economy and the acceleration of the transformation of old cities, the amount of construction waste in my country has increased by leaps and bounds, and it has now accounted for 30%-40% of the total urban waste. Calculated based on the sta...

Claims

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Application Information

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IPC IPC(8): B28B1/00C04B35/622
Inventor 张付申王川
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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