Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Rotary hearth furnace flue gas dedusting ash treatment process

A treatment process and rotary hearth furnace technology, applied in the chemical industry, climate sustainability, sustainable manufacturing/processing, etc., can solve problems such as difficulty in direct utilization, reduce energy consumption by evaporation, simple process flow, and low water consumption Effect

Active Publication Date: 2017-07-21
CHONGQING CISDI THERMAL & ENVIRONMENTAL ENG CO LTD
View PDF10 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pb, Zn, K, Na, Cl elements are further enriched in the flue dust of the rotary hearth furnace, resulting in the enrichment of the elements in the dust removal dust of the flue gas of the rotary hearth furnace. If it is not separated, it is difficult to use directly

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
  • Rotary hearth furnace flue gas dedusting ash treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0019] As shown in the figure, add the rotary hearth furnace flue gas dust removal ash, saturated potassium mother liquor, and dilute potassium mother liquor into the heating stirring tank at a mass ratio of 1:4:1, and heating the temperature to 80-90℃; the stirred slurry enters the vacuum The front section of the belt dehydrator is dehydrated, and the filtrate I and the filter residue I are separated. The dehydrated filter residue I is sprayed and rinsed in the second stage of the vacuum belt dehydrator and dehydrated again. The spray water is used in series to make the filter residue I The Cl element removal rate in the filter residue can reach more than 90%, and the ZnO content in the washed filter residue I can reach more than 60%, which can be sold as zinc slag and used as a raw material for zinc smelting.

[0020] The filtrate I rem...

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

No PUM Login to View More

Abstract

The invention discloses a rotary hearth furnace flue gas dedusting ash treatment process. According to the process, rotary hearth furnace flue gas dedusting ash and a circulating solution are mixed to form slurry, filter liquor and filter residue are separated by dehydration of a vacuum belt-type dehydrator, a dissolving and circulating mode is adopted by the filter liquor to wash, the filter residue is subjected to washing and dehydration in series, and a circulating solution is from subsequent slurry dehydration and filter residue washing processes; by the process, valuable elements in the rotary hearth furnace flue gas dedusting ash can be separated, and valuable utilization can be achieved respectively; the allocation and operation procedures of equipment are simple, comprehensive recycling use of secondary resource can be realized, the water consumption is reduced while a washing effect is guaranteed, the energy consumed during evaporation is reduced, and the purpose of energy conservation and emission reduction is achieved.

Description

Technical field [0001] The invention belongs to the field of dust removal ash recovery treatment, and specifically relates to a rotary hearth furnace flue gas dust removal ash treatment process. Background technique [0002] In the process of iron and steel smelting, trace elements such as Pb, Zn, K, Na, Cl in various raw materials are enriched in flue gas, resulting in sintering head ash, electric furnace ash, converter ash, blast furnace ash and other above-mentioned elements If the content is too high, if it enters the sintering cycle, it will cause difficulties for the blast furnace to move forward. At present, the rotary hearth furnace is gradually used for treatment. After removing Pb, Zn, K, Na, and Cl, the metal pellets enter the blast furnace or converter. The elements Pb, Zn, K, Na, and Cl are further enriched in the flue dust of the rotary hearth furnace, which leads to the enrichment of the elements of the flue gas dust ash of the rotary hearth furnace. Without separ...

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): C01D3/04
CPCC01D3/04C01P2006/80Y02P20/10
Inventor 田文杰郭秀键雍海泉罗磊
Owner CHONGQING CISDI THERMAL & ENVIRONMENTAL ENG CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com