CN101845526B - Method for controlling centrifugal granulation of molten blast furnace slag - Google Patents
Method for controlling centrifugal granulation of molten blast furnace slag Download PDFInfo
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- CN101845526B CN101845526B CN2010101915461A CN201010191546A CN101845526B CN 101845526 B CN101845526 B CN 101845526B CN 2010101915461 A CN2010101915461 A CN 2010101915461A CN 201010191546 A CN201010191546 A CN 201010191546A CN 101845526 B CN101845526 B CN 101845526B
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- blast furnace
- furnace slag
- centrifugal granulation
- plc controller
- temperature
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The invention relates to a method for controlling centrifugal granulation of molten blast furnace slag. The method comprises the following steps of: 1) uniformly arranging a plurality of temperature measuring devices along the direction vertical to a water cooled wall; 2) embedding a genetic algorithm program in a PLC controller, comparing a few temperature measuring points, and optimally judging and predicating a position with a minimum temperature value of the temperature measuring points; and 3) controlling a hydraulic device under a rotor by the PLC controller, and adjusting the height of a rotor to the position with the minimum temperature value. The method for controlling the centrifugal granulation of the molten blast furnace slag has the advantages of being compact and simple in structure and easy in operation, avoiding local overheating of the water cooled wall, prolonging the service life of slag centrifugal granulation devices, improving heat exchange rate and providing convenience for energy source recovery.
Description
Technical field
The energy recovery that the present invention relates in the molten slag granulating in iron and steel, the nonferrous metallurgy industry is utilized the field, relates in particular to a kind of control method of molten blast furnace slag intelligence centrifugal granulation.
Background technology
Blast furnace slag is the by product of blast-furnace smelting, and it is by non-volatile being grouped in the gangue in the ore, ash content in the fuel and the flux.One ton of pig iron of China's smelting at present produces 0.3～0.6 ton of blast furnace slag approximately.China produced 4.71 hundred million tons of iron in 2008, calculated even press 0.3t slag/t iron, and the quantum of output of blast furnace slag is 1.4 hundred million tons, and its outflow temperature this shows the energy-saving and cost-reducing important channel of molten blast furnace slag sensible heat recovery just becoming iron and steel enterprise greater than 1500 ℃ simultaneously.Molten blast furnace slag is typical silicate slag, and it has following characteristics: (1) thermal conductivity is lower, 1400～1500 ℃ of liquid phase stages, and λ=0.1～0.3W/ (mK); The glassy phase stage, λ=1～2W/ (mK); (2) viscosity is along with the reduction of temperature sharply raises.In order to improve the heat transfer rate, just must dwindle the size of slag particle, so the slag granulation just becomes the gordian technique that its sensible heat reclaims.
The centrifugal granulation method is easy to characteristics such as control and monomer throughput are big because it has dry type granulation high viscosity liquid, size droplet diameter; and be considered to the effective means of slag granulation; but there is certain problem in general centrifugal granulation method: concentrate the somewhere that is splashed to water wall such as slag granules; cause the water wall local superheating; influence the work-ing life of water wall and the heat exchange effect of heat-eliminating medium; in addition; the distribution of slag granules is also inhomogeneous, and how to address the above problem becomes centrifugal granulation blast furnace slag industrialization key.
Summary of the invention
The control method that the purpose of this invention is to provide a kind of centrifugal granulation of molten blast furnace slag; make the slag that splashes get on the furnace wall uniformly; the water wall damage that minimizing causes because of local superheating prolongs water wall work-ing life, and can improve the heat exchange effect of slag particle and water coolant.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of control method of centrifugal granulation of molten blast furnace slag comprises the steps:
1), measures the real time temperature of this point along the even configuration plurality of temperature measuring of water wall vertical direction;
2) temperature measuring equipment is connected with PLC controller load module, implants genetic algorithm program in the PLC controller, respectively several points for measuring temperature is compared, and its temperature minimum value position is optimized judges and prediction;
3) by the PLC controller hydraulic efficiency plant under the revolving cup is controlled, the height of adjusting revolving cup is to temperature minimum value position.Described temperature measuring equipment is hot resistance or thermopair.
Compared with prior art, the invention has the beneficial effects as follows: compact construction is simple, easy handling, avoids the water wall local superheating, prolongs the work-ing life of slag centrifugal granulation device, improves heat transfer rate, helps energy recovery.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1-revolving cup motor 2-water wall 3-tundish 4-revolving cup 5-fixed support 6-catch tray 7-hot resistance 8-gas blower 9-PLC controller 10-hydraulic efficiency plant
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
See Fig. 1; a kind of control method of centrifugal granulation of molten blast furnace slag; the device top is provided with tundish 3; the bottom is provided with catch tray 6; sidewall is provided with water wall 2; water wall 2 is provided with 4～8 hot resistances 7; revolving cup 4 bottoms are connected with hydraulic efficiency plant 10 by fixed support 5; 4 liftings of hydraulic efficiency plant 10 may command revolving cups; the revolving cup 4 of tundish 3 bottoms speed with 800～1600 rev/mins under the drive of revolving cup motor 1 is rotated; the fused blast furnace slag is dropped in from tundish 3 in the revolving cup 4, because high speed centrifugal action that revolving cup forms, 1400～1500 ℃ blast furnace slag is granulated into the particle that diameter is 1～5mm; and around being splashed on the water wall 2; fall by catch tray 6 and collect, the sensible heat in the blast furnace slag is reclaimed by the air that the water in the water wall 2 and gas blower 8 blast, and the step of its realization is as follows:
1) the present invention measures the real time temperature of this point separately along 4 hot resistances 7 of even configuration of water wall 2 vertical direction among the embodiment;
2) hot resistance 7 is connected with PLC controller 9 load modules, implants genetic algorithm program in the PLC controller 9, and the temperature value that 4 hot resistances 7 are gathered compares respectively, its temperature minimum value position is optimized judges and prediction;
3) control by 9 pairs of revolving cup hydraulic efficiency plant 10 of PLC controller, the height of adjusting revolving cup 4 is to temperature minimum value position, with the corresponding demarcation of height of working current with the revolving cup 4 of hydraulic efficiency plant 10,9 of PLC controllers need can realize control to the revolving cup height according to low warm spot positions output respective drive electric current like this.
The present invention utilizes centrifugal force to carry out slag dry type granulation; utilize the PLC controller to adjust the height at revolving cup place; can avoid water wall because local superheating influences its work-ing life; help more realizing that energy fully reclaims purpose; its refrigerative blast furnace slag can be used for producing cement, helps realizing " zero release " of waste.
Claims (2)
1. the control method of a centrifugal granulation of molten blast furnace slag is characterized in that, comprises the steps:
1), measures the real time temperature of this point along the even configuration plurality of temperature measuring of water wall vertical direction;
2) temperature measuring equipment is connected with PLC controller load module, implants genetic algorithm program in the PLC controller, respectively several points for measuring temperature is compared, and its temperature minimum value position is optimized judges and prediction;
3) by the PLC controller hydraulic efficiency plant under the revolving cup is controlled, the height of adjusting revolving cup is to temperature minimum value position.
2. the control method of centrifugal granulation of molten blast furnace slag according to claim 1 is characterized in that, described temperature measuring equipment is hot resistance or thermopair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101915461A CN101845526B (en) | 2010-06-04 | 2010-06-04 | Method for controlling centrifugal granulation of molten blast furnace slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101915461A CN101845526B (en) | 2010-06-04 | 2010-06-04 | Method for controlling centrifugal granulation of molten blast furnace slag |
Publications (2)
| Publication Number | Publication Date |
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| CN101845526A CN101845526A (en) | 2010-09-29 |
| CN101845526B true CN101845526B (en) | 2011-09-28 |
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| CN2010101915461A Expired - Fee Related CN101845526B (en) | 2010-06-04 | 2010-06-04 | Method for controlling centrifugal granulation of molten blast furnace slag |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI484040B (en) * | 2013-10-03 | 2015-05-11 | China Steel Corp | Slag Roving Granulation Screening Device |
| GB2528972B (en) * | 2014-08-08 | 2016-10-05 | Primetals Technologies Austria GmbH | Slag granulation system |
| CN105905939B (en) * | 2016-04-21 | 2017-07-28 | 重庆大学 | The apparatus and method of chlorination are directly granulated after a kind of titanium-containing blast furnace slag carbonization |
| CN106191348B (en) * | 2016-09-27 | 2018-06-05 | 重庆赛迪热工环保工程技术有限公司 | A kind of method and system for improving metallurgical cinder dry granulation device performance |
| CN109238492B (en) * | 2018-11-14 | 2020-03-03 | 重庆大学 | Temperature monitoring system of granulator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418950A (en) * | 2008-12-10 | 2009-04-29 | 东北大学 | System for recovering sensible heat of blast furnace slag |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4433455B2 (en) * | 2003-09-09 | 2010-03-17 | 財団法人電力中央研究所 | Granulated method of molten slag and granulated apparatus of molten slag |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418950A (en) * | 2008-12-10 | 2009-04-29 | 东北大学 | System for recovering sensible heat of blast furnace slag |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2005-82454A 2005.03.31 |
| 戴晓天等.高炉渣急冷干式粒化处理工艺分析.《钢铁研究学报》.2007,第19卷(第5期),14-19. * |
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| CN101845526A (en) | 2010-09-29 |
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