Method for sintering ash through mechanical hot-pressing coupling

A technology of sintering ash and mechanical pressurization, which is applied in the fields of solid waste removal, recycling technology, construction waste recycling, etc., can solve the problems of difficult ash treatment such as high processing temperature, and achieve reduction of secondary pollution, energy consumption, The effect of lowering the sintering temperature

Inactive Publication Date: 2021-11-19
DALIAN UNIV OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a mechanical hot-press coupling sintering method. Aiming at the current problems of difficult ash treatment and high treatment temperature, by applying mechanical pressure during the heat treatment process and adjusting the pressure and temperature, a large degree of densification can be achieved to reduce the Sintering temperature, reducing processing costs while improving the mechanical strength of the product

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for sintering ash through mechanical hot-pressing coupling
  • Method for sintering ash through mechanical hot-pressing coupling
  • Method for sintering ash through mechanical hot-pressing coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Place the fly ash in an oven at 105°C to dry to constant weight. In order to ensure the uniform particle size of the fly ash in the follow-up experiments, this experiment uses a 100-mesh sieve to sieve the fly ash and put it in a ziplock bag for later use. . Weigh 5.0 g of the sieved fly ash and put it into a mold (20 mm in diameter) of a thermocompression coupled sintering device. When carrying out the experiment, first set the target pressure of 10MPa, and control the punch on the upper part of the pressure sensor through the computer. The punch drops at a speed of 1mm / min under the control of the computer to apply pressure to the reaction chamber. When the target pressure is reached, keep the set pressure. Set a certain pressure, and start to raise the temperature to the target temperature of 400 °C at a rate of 10 °C / min, keep the pressure at the target temperature for 1 hour, stop heating, and release the pressure through the computer control pressure se...

Embodiment 2

[0027] Example 2: Place the fly ash in an oven at 105°C to dry until constant weight. In order to ensure uniform particle size of the fly ash in subsequent experiments, this experiment uses a 100-mesh sieve to sieve the fly ash and put it in a ziplock bag for later use. . Weigh 5.0 g of the sieved fly ash and put it into a mold (20 mm in diameter) of a thermocompression coupled sintering device. When conducting experiments, first set the target pressure of 50MPa, and control the punch on the upper part of the pressure sensor through the computer. The punch drops at a speed of 1mm / min under the control of the computer to apply pressure to the reaction chamber. When the target pressure is reached, keep the set pressure. Set a certain pressure, and start to raise the temperature to the target temperature of 400 °C at a rate of 10 °C / min, keep the pressure at the target temperature for 1 hour, stop heating, and release the pressure through the computer control pressure sensor. Sa...

Embodiment 3

[0028] Example 3: Place the fly ash in an oven at 105°C and bake to constant weight. In order to ensure the uniform particle size of the fly ash in the subsequent experiments, this experiment uses a 100-mesh sieve to sieve the fly ash and put it in a ziplock bag for later use . Weigh 5.0 g of the sieved fly ash and put it into a mold (20 mm in diameter) of a thermocompression coupled sintering device. When conducting the experiment, first set the target pressure of 100MPa, and control the punch on the upper part of the pressure sensor through the computer. The punch drops at a speed of 1mm / min under the control of the computer to apply pressure to the reaction chamber. When the target pressure is reached, keep the set pressure. Set a certain pressure, and start to raise the temperature to the target temperature of 500 °C at a rate of 10 °C / min, keep the pressure at the target temperature for 1 hour, stop heating, and release the pressure through the computer control pressure s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
compressive strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
densityaaaaaaaaaa
Login to view more

Abstract

The invention provides a method for sintering ash through mechanical hot-pressing coupling, and belongs to the field of solid waste treatment. Manner 1: firstly, the ash is heated to the target sintering temperature, and then under the condition that the target sintering temperature is maintained, certain mechanical pressure is applied to the ash for sintering, specifically, the target sintering temperature is 300-700 DEG C, the mechanical pressure does not exceed 100 MPa, and the sum of the sintering time and the mechanical pressurization time is controlled to be 0.2-2 h. Manner 2: mechanical pressure is applied in the sintering process of the ash at the target temperature, specifically, the target sintering temperature is 300-700 DEG C, the mechanical pressure does not exceed 100 MPa, and the time is 0.2-2 h. By the adoption of the method, secondary pollution caused by volatilization of pollutants such as heavy metal in the high-temperature sintering process of the ash can be reduced, meanwhile, the sintering temperature of the ash is greatly reduced, energy consumption is reduced, and both economic and environmental benefits are achieved.

Description

technical field [0001] The invention relates to the field of processing ash, which is a bulk solid waste in environmental engineering, and in particular relates to a method for coupling sintering ash with mechanical heat pressing. Background technique [0002] Ashes are mainly inorganic solid wastes produced in domestic and industrial production processes, including fly ash, waste incineration bottom ash and fly ash, sludge ash, oil shale ash, construction waste and slag, etc., usually containing leachable heavy metals Pollutants such as pollutants are widely present in the environment at present, occupying land resources, causing environmental pollution and other problems, which will cause great harm to the environment and human health, and require economical and effective treatment. [0003] At present, there are three commonly used treatment methods for ash and slag: physical stabilization / solidification, chemical chelation and heat treatment. Physical stabilization / curi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B5/00Y02W30/58
Inventor 李爱民王雪雪张雷姬国钊高原
Owner DALIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap