CN202717824U - System for comprehensively utilizing coal gas and dust of iron and steel plant - Google Patents
System for comprehensively utilizing coal gas and dust of iron and steel plant Download PDFInfo
- Publication number
- CN202717824U CN202717824U CN2012203091780U CN201220309178U CN202717824U CN 202717824 U CN202717824 U CN 202717824U CN 2012203091780 U CN2012203091780 U CN 2012203091780U CN 201220309178 U CN201220309178 U CN 201220309178U CN 202717824 U CN202717824 U CN 202717824U
- Authority
- CN
- China
- Prior art keywords
- iron
- rotary hearth
- hearth furnace
- gas
- dust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture Of Iron (AREA)
Abstract
The utility model discloses a system for comprehensively utilizing coal gas and dust of an iron and steel plant. The system is characterized in that the recovered dust and coal dust of the iron and steel plant are proportioned according to a certain ratio and then pelletized to form self-reducing pellets, wherein the self-reducing pellets are added into a rotary hearth furnace after being dried; the coal gas of the iron and steel plant is used as a fuel by the rotary hearth furnace; after being rotated in the rotary hearth furnace for a circle, the self-reducing pellets are reduced into sponge iron to be fed into a blast furnace, a converter or an electric furnace for use; and after gas produced by the rotary hearth furnace is subjected to waste heat recovery, the recovered heat is used for preheating the coal gas of the iron and steel plant serving as the fuel of the rotary hearth furnace or is fed to a hot blast furnace to preheat air of the hot blast furnace.
Description
Technical field
The utility model belongs to the Iron And Steel Industry technical field, relates to the utilization system of a kind of Gas In Iron And Steel Works and dust.
Background technology
The environmental requirement that steel industry is increasingly serious and Market Situation require iron and steel enterprise must accomplish energy-saving and emission-reduction, reduce cost.In Production Process for Steel Enterprise, a large amount of by product coal gas and the dust of annual generation.At present, obtained utilizing preferably although Gas In Iron And Steel Works acts as a fuel, but still be difficult to avoid that a large amount of coal gas diffusions is arranged every year.And the processing of dust then utilizes less.If do not reclaimed, the outward transport processing costs of not only contaminate environment, and increase enterprise, aggravation enterprise production cost.Along with the importance of environmental protection and comprehensive utilization of resources is familiar with by people day by day, the processing of Dust of Iron And Steel Works also enjoys industry to pay close attention to.
The utility model content
Problem to be solved in the utility model is the present situation that can't rationally efficiently utilize for having Gas In Iron And Steel Works and dust now, a kind of system that fully utilizes Gas In Iron And Steel Works and dust is proposed, rationally effectively utilize Gas In Iron And Steel Works and dust, better improve the Rate of utilization of coal gas, and can realize that dust turns waste into wealth, not only be conducive to reduce waste discharge, reduce environmental pollution and enterprise's production cost, simultaneously, be conducive to improve the comprehensive utilization of resources level, to strengthening iron and steel enterprise's competitive power, realize that the China Steel industrial sustainable development has vital role.
The utility model solves the problems of the technologies described above the technical scheme that adopts:
A kind of system that fully utilizes Gas In Iron And Steel Works and dust is characterized in that: pelletizer is set, and described pelletizer can form the autoreduction pelletizing after the proportioning pelletizing by a certain percentage with Dust of Iron And Steel Works and the coal dust that reclaims; Set gradually autoreduction pelletizing dehumidification system and the rotary hearth furnace that the autoreduction pelletizing can be reduced to sponge iron behind the pelletizer, described rotary hearth furnace is connected with the Gas In Iron And Steel Works recovery system; Be provided for blast furnace, converter or the electric furnace of smelting iron behind the rotary hearth furnace; Rotary hearth furnace connects flue gas waste heat recovery system, and residual neat recovering system connects respectively autoreduction pelletizing dehumidification system, gas preheating system and hotblast stove air preheating system, and gas recovery system is connected with rotary hearth furnace through the gas preheating system.
By technique scheme, when the sponge iron degree of metalization of described rotary hearth furnace production is higher than 80%, converter or electric furnace are set behind the rotary hearth furnace; When degree of metalization is lower than 80%, blast furnace is set behind the rotary hearth furnace.
By technique scheme, described Dust of Iron And Steel Works comprises blast furnace dust, converter dust, iron scale, gravitational dust collection ash, waste.
By technique scheme, described Gas In Iron And Steel Works comprises blast furnace gas, coal gas of converter, coke-oven gas, according to field condition, can respectively as rotary hearth furnace fuel, also can mix rear as rotary hearth furnace fuel.
By technique scheme, after the flue gas that described rotary hearth furnace produces carried out waste heat recovery, the heat of recovery was used for preheating as the Gas In Iron And Steel Works of rotary hearth furnace fuel or is sent to hotblast stove preheating heat wind furnace air; The calorie distribution amount that reclaims determines according to field condition, preferentially the Gas In Iron And Steel Works that is used for rotary hearth furnace fuel is carried out preheating.
By technique scheme, after the flue gas that described rotary hearth furnace produces carries out waste heat recovery, be then used in dry autoreduction pelletizing.
The beneficial effects of the utility model are: the utilising efficiency that has improved Gas In Iron And Steel Works and dust, reduced the discharging of dust, reduced the intractability of dust, directly Dust of Iron And Steel Works being converted into raw material on the spot is used, improved the comprehensive utilization ratio of resource, reduce environmental pollution, when reducing enterprise's dust disposal cost, can also bring considerable economic benefit and social benefit.
Description of drawings
Accompanying drawing 1 is structured flowchart of the present utility model.
Embodiment
For understanding better the utility model, below in conjunction with embodiment the utility model is further described, but does not consist of restriction of the present utility model.
With reference to Fig. 1, according to the comprehensive utilization Gas In Iron And Steel Works of the utility model enforcement and the system of dust, it is characterized in that: pelletizer is set, and described pelletizer can form the autoreduction pelletizing after the proportioning pelletizing by a certain percentage with Dust of Iron And Steel Works and the coal dust that reclaims; Set gradually autoreduction pelletizing dehumidification system and the rotary hearth furnace that the autoreduction pelletizing can be reduced to sponge iron behind the pelletizer, described rotary hearth furnace is connected with the Gas In Iron And Steel Works recovery system; Be provided for blast furnace, converter or the electric furnace of smelting iron behind the rotary hearth furnace; Rotary hearth furnace connects flue gas waste heat recovery system, and residual neat recovering system connects respectively autoreduction pelletizing dehumidification system, gas preheating system and hotblast stove air preheating system, and gas recovery system is connected with rotary hearth furnace through the gas preheating system.
By technique scheme, when the sponge iron degree of metalization of described rotary hearth furnace production is higher than 80%, converter or electric furnace are set behind the rotary hearth furnace; When degree of metalization is lower than 80%, blast furnace is set behind the rotary hearth furnace.
By technique scheme, described Dust of Iron And Steel Works comprises blast furnace dust, converter dust, iron scale, gravitational dust collection ash, waste.
By technique scheme, described Gas In Iron And Steel Works comprises blast furnace gas, coal gas of converter, coke-oven gas, according to field condition, can respectively as rotary hearth furnace fuel, also can mix rear as rotary hearth furnace fuel.
Adopt said system to carry out the specific embodiment that Gas In Iron And Steel Works and comprehensive dust utilize as follows:
Embodiment 1
1) with the pelletizing behind the mixing in proportion such as Dust of Iron And Steel Works, coal dust, binding agent, forms the autoreduction pelletizing;
2) with the flue gas that carries out after the waste heat recovery autoreduction pelletizing is dried;
3) rotary hearth furnace all adopts blast furnace gas to act as a fuel;
4) the autoreduction pelletizing after will drying adds in the rotary hearth furnace and reduces, and reduction temperature is 1380 ℃, and the recovery time is 12 minutes;
5) degree of metalization that obtains after will reducing is that 68% sponge iron adds in the blast furnace, uses as blast furnace ironmaking raw material;
6) high-temperature flue gas of rotary hearth furnace generation reclaims through residual neat recovering system, and the heat of recovery is all for the blast furnace gas of preheating as rotary hearth furnace fuel.
Embodiment 2
1) with the pelletizing behind the mixing in proportion such as Dust of Iron And Steel Works, coal dust, binding agent, forms the autoreduction pelletizing;
2) with the flue gas that carries out after the waste heat recovery autoreduction pelletizing is dried;
3) rotary hearth furnace all adopts coke-oven gas to act as a fuel;
4) the autoreduction pelletizing after will drying adds in the rotary hearth furnace and reduces, and reduction temperature is 1420 ℃, and the recovery time is 10 minutes;
5) degree of metalization that obtains after will reducing is that 85% sponge iron adds in the converter, uses as the converter steelmaking raw material;
6) high-temperature flue gas of rotary hearth furnace generation reclaims through residual neat recovering system, and half is used for preheating as the coke-oven gas of rotary hearth furnace fuel the heat of recovery, and half is used for preheating heat wind furnace air.
Embodiment 3
1) with the pelletizing behind the mixing in proportion such as Dust of Iron And Steel Works, coal dust, binding agent, forms the autoreduction pelletizing;
2) with the flue gas that carries out after the waste heat recovery autoreduction pelletizing is dried;
3) rotary hearth furnace adopts blast furnace gas and coke-oven gas respectively to account for 50% gas mixture to act as a fuel;
4) the autoreduction pelletizing after will drying adds in the rotary hearth furnace and reduces, and reduction temperature is 1400 ℃, and the recovery time is 11 minutes;
5) degree of metalization that obtains after will reducing is that 83% sponge iron adds in the electric furnace, uses as the Electric furnace steel making raw material;
6) high-temperature flue gas of rotary hearth furnace generation reclaims through residual neat recovering system, and the heat 60% of recovery is used for preheating as the coke-oven gas of rotary hearth furnace fuel, and 40% is used for preheating heat wind furnace air.
Embodiment 4
1) with the pelletizing behind the mixing in proportion such as Dust of Iron And Steel Works, coal dust, binding agent, forms the autoreduction pelletizing;
2) with the flue gas that carries out after the waste heat recovery autoreduction pelletizing is dried;
3) rotary hearth furnace adopts the gas mixture of blast furnace gas, coal gas of converter, coke-oven gas to act as a fuel, and in the gas mixture, blast furnace gas: coal gas of converter: the ratio of coke-oven gas is 5:2:3;
4) the autoreduction pelletizing after will drying adds in the rotary hearth furnace and reduces, and reduction temperature is 1390 ℃, and the recovery time is 12 minutes;
5) degree of metalization that obtains after will reducing is that 72% sponge iron adds in the blast furnace, uses as blast furnace ironmaking raw material;
6) high-temperature flue gas of rotary hearth furnace generation reclaims through residual neat recovering system, and the heat 80% of recovery is used for preheating as the coke-oven gas of rotary hearth furnace fuel, and 20% is used for preheating heat wind furnace air.
Above disclosed only is preferred embodiment of the present utility model, and the equivalence of doing according to the utility model changes, and still belongs to protection domain of the present utility model.
Claims (2)
1. system that fully utilizes Gas In Iron And Steel Works and dust is characterized in that: pelletizer is set, and described pelletizer can form the autoreduction pelletizing after the proportioning pelletizing by a certain percentage with Dust of Iron And Steel Works and the coal dust that reclaims; Set gradually autoreduction pelletizing dehumidification system and the rotary hearth furnace that the autoreduction pelletizing can be reduced to sponge iron behind the pelletizer, described rotary hearth furnace is connected with the Gas In Iron And Steel Works recovery system; Be provided for blast furnace, converter or the electric furnace of smelting iron behind the rotary hearth furnace; Rotary hearth furnace connects flue gas waste heat recovery system, and residual neat recovering system connects respectively autoreduction pelletizing dehumidification system, gas preheating system and hotblast stove air preheating system, and gas recovery system is connected with rotary hearth furnace through the gas preheating system.
2. system according to claim 1 is characterized in that: when the sponge iron degree of metalization of rotary hearth furnace production is higher than 80%, converter or electric furnace are set behind the rotary hearth furnace; When degree of metalization is lower than 80%, blast furnace is set behind the rotary hearth furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203091780U CN202717824U (en) | 2012-06-29 | 2012-06-29 | System for comprehensively utilizing coal gas and dust of iron and steel plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203091780U CN202717824U (en) | 2012-06-29 | 2012-06-29 | System for comprehensively utilizing coal gas and dust of iron and steel plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202717824U true CN202717824U (en) | 2013-02-06 |
Family
ID=47619652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203091780U Expired - Fee Related CN202717824U (en) | 2012-06-29 | 2012-06-29 | System for comprehensively utilizing coal gas and dust of iron and steel plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202717824U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104109755A (en) * | 2014-07-30 | 2014-10-22 | 中冶南方工程技术有限公司 | Production system and method of cold-pressed metal pellets of fly ashes |
| CN110205431A (en) * | 2019-06-04 | 2019-09-06 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Rotary kiln coal-based direct reduction oxygenation is molten to divide furnace short route molten iron making processes |
-
2012
- 2012-06-29 CN CN2012203091780U patent/CN202717824U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104109755A (en) * | 2014-07-30 | 2014-10-22 | 中冶南方工程技术有限公司 | Production system and method of cold-pressed metal pellets of fly ashes |
| CN104109755B (en) * | 2014-07-30 | 2016-04-20 | 中冶南方工程技术有限公司 | A kind of dedusting ash is colded pressing metal pelletizing production system and method |
| CN110205431A (en) * | 2019-06-04 | 2019-09-06 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Rotary kiln coal-based direct reduction oxygenation is molten to divide furnace short route molten iron making processes |
| CN110205431B (en) * | 2019-06-04 | 2021-04-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Short-process molten iron production process of rotary kiln coal-based direct reduction oxygenation melting furnace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Guo et al. | Current situation of energy consumption and measures taken for energy saving in the iron and steel industry in China | |
| CN102703727A (en) | Method for comprehensively utilizing gas and dust in steel works | |
| CN104073649A (en) | Iron-containing zinc powder recycling process | |
| CN204265712U (en) | Gasification, pyrolysis combination producing activated carbon system | |
| CN102329909A (en) | Method for extracting iron particles and zinc powder from dust of steel and iron plant | |
| CN103788975B (en) | The method that brown coal microwave-heating utilizes | |
| CN103060504B (en) | Method for preparing sponge iron by biomass char | |
| CN202717824U (en) | System for comprehensively utilizing coal gas and dust of iron and steel plant | |
| CN106635111B (en) | A kind of biomass pyrolytic production liquid fuel co-producing bio charcoal system | |
| CN103451440B (en) | Method of recycling high titanium slag smelting reduction smoke dust and screened fine coal | |
| CN202521588U (en) | Hot air circulation device of boiler | |
| CN204039332U (en) | The metallurgical restoring system of coal gas circulation coal wholegrain radial sector pyrolysis coupling | |
| CN204211494U (en) | The system of blast furnace oxygen hot method melting calcium carbide in a kind of PVC production process | |
| CN102787186A (en) | Thermal and electric combined supply system and method using blast furnace slag washing water and exhaust steam low-temperature waste heat | |
| CN104891498A (en) | Smelting method for industrial silicon | |
| CN102719587A (en) | Rotary hearth furnace-smelting reduction furnace joint ironmaking process | |
| CN209383725U (en) | The upgrading system of low-order coal pulverized coal forming is carried out using waste heat flue gas | |
| CN109628682B (en) | Efficient utilization method of waste plastic particles | |
| CN104152609B (en) | blast furnace slag waste heat recycling system | |
| CN102586530A (en) | Method for producing sponge iron by using coke-oven gas | |
| CN206656362U (en) | A kind of methane external-heat dries carbonization integral furnace | |
| CN201811263U (en) | Full N2 circulation equipment for preparing soft coal powder | |
| CN201909528U (en) | Smelting furnace using circulatory waste heat of regenerated lead | |
| CN207193202U (en) | The system that a kind of high temperature pyrolysis gas recycle | |
| CN104789728A (en) | Short-process iron smelting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20150629 |
|
| EXPY | Termination of patent right or utility model |