Rotary hearth furnace flue gas dedusting ash treatment process
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
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
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
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
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
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
Login to view more 
Login to view more