CN102565141B - Method for measuring moisture of sintered mixture - Google Patents
Method for measuring moisture of sintered mixture Download PDFInfo
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- CN102565141B CN102565141B CN 201110431810 CN201110431810A CN102565141B CN 102565141 B CN102565141 B CN 102565141B CN 201110431810 CN201110431810 CN 201110431810 CN 201110431810 A CN201110431810 A CN 201110431810A CN 102565141 B CN102565141 B CN 102565141B
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Abstract
The invention belongs to the technical field of metallurgical processes, in particular relates to a sintering process technology, aims to overcome the defects of five on-line moisture measuring methods including a neutron moisture measuring method and an infrared moisture measuring method, and provides a method for measuring the moisture of a sintered mixture in a spherical electroconductive-capacitive composite mode. A measuring sensor probe and a fixed bracket are employed. A measuring sensor has an electroconductive-capacitive composite structure, and the measuring sensor probe has a wear-resistant spherical structure and is arranged inside a mixture roller through the fixed bracket and inserted into a part, which is 150 to 250 mm deep, in a mixture layer. The method has the advantagesthat: real-time and on-line measurement of the moisture is realized; a hysteresis phenomenon of moisture measurement is eliminated; external interference is reduced; production cost is reduced; and easiness in maintenance is realized.
Description
Technical field
The invention belongs to the metallurgical technology technical field, particularly relate to SINTERING TECHNOLOGY.
Background technology
Sintered mixture moisture is one of important control parameter of SINTERING PRODUCTION technology, the throughput rate of the stability influence sintering deposit of moisture and the quality of sintering deposit.Effectively the moisture of control sinter mixture is the target that SINTERING PRODUCTION department is pursued always.The online survey water method that is applied to sintering plant at present mainly is divided into: neutron aquametry, infrared aquametry, microwave aquametry, electricity are led aquametry, specific inductive capacity method etc.The major technique characteristics are as follows:
(1) neutron aquametry: say so from principle and to measure the content of protium the material, have only when there is fixing corresponding relation in protium with liquid water content, the moisture in the past that converts is only accurately.Will add certain amount of calcined lime in the sinter mixture, unslaked lime suction back digestion becomes Ca (OH)
2, for the Neutron Moisture instrument, total body burden of protium not to become, the thermal neutron invariable number that detects, and the moisture that the Neutron Moisture instrument shows is constant, but the actual moisture of sinter mixture become, and can bring the error of measurement thus.Equally, the limonite that contains water of crystallization contains the material of protium with other, all can disturb neutron moisture tester to the accurate measurement of moisture.Contactless Neutron Moisture instrument radiation source intensity is big, and radiation source is installed in the material outside, needs enough safeguards are installed, and has increased cost; The existence of radiation source also make the field personnel exist safety on worry.
(2) infrared aquametry: what infrared moisture meter was measured is the moisture on sinter mixture surface.In addition, the charge level steam of sinter mixture, dust etc. all can exert an influence to the measurement of infrared moisture meter.Charge level steam can absorb infrared ray, and the variation of compound color, granularity, character of surface, environment temperature etc. can influence the propagation of light signal, and dust can make surveys the reduction of camera lens transparency.
(3) microwave aquametry: the microwave moisture instrument of the online survey water of sinter mixture mostly is the transmission-type Moisture Meter, measure microwave and pass power attenuation and the phase shift that compound produces and change, measurement be the contained whole free waters of sinter mixture.Have measuring accuracy height, response time short, can realize advantage such as on-line measurement, but the variation of iron content also can cause the decay that microwave is bigger in the compound, causes error, microwave also is vulnerable to the interference of steam in addition, and human body is had injury.
(4) conductance method: sintered mixture moisture and its electricity are led has certain relation, and the conductance type Moisture Meter is utilized moisture and material conductivity relation and made.It is a kind of method of contact type measurement volume water.It has the ability that on-line continuous is measured, and can show moisture value, and response speed is very fast, and environmentally safe is invested lessly, but that its measuring accuracy is influenced by the material tightness degree is bigger, and maintenance load is big.
(5) specific inductive capacity method: the specific inductive capacity fado adopts plane-parallel capacitor, cylinder capacitor.Plane-parallel capacitor constitutes two electrodes by two parallel metal plates; And cylinder capacitor is nested together by two different metallic cylinder of diameter, forms inside and outside two electrodes, and testee is between two electrodes, and the electric conductivity of looking object determines whether electrode is taked insulation measures.But make driving source with high-frequency ac voltage, then all very important to the influence of the lead cable distributed capacitance of instrument and sensor surrounding space stray electric field to sensor, need take strict shielding measure, and the packed density of testee directly influences electric capacity again, so the specific inductive capacity method more is applicable to measurement liquid but not the moisture of solid granule.
Summary of the invention
The objective of the invention is to overcome above five kinds of deficiencies that are applied to the on-line moisture determination method of sintering plant, propose a kind of employing ball-type electricity and lead-electric capacity combined type sintered mixture moisture measuring method.Principal feature comprises: the one, solve the measurement point large time delay phenomenon of on cylinder output material belt, carrying out moisture measurement; The 2nd, adopt electric capacity moisture measurement method to revise conductivity water and divide and measure the influence that is subjected to the material tightness degree, make the measuring accuracy height, can realize automatic control; The 3rd, adopt abrasion-proof steel ball processed sensor probe, put into below the compound cylinder charge level 150-250mm, carry out the on-line measurement of sintered mixture moisture.Long service life, simple in structure, price is lower, is convenient to promote.
The present invention mainly realizes by following means.
The measuring method of sintered mixture moisture of the present invention is made up of survey sensor probe and fixed support.Survey sensor adopts electricity to lead-the electric capacity composite structure, and the survey sensor probe adopts wear-resisting ball-type structure, by fixed support the survey sensor probe is installed in compound cylinder inside, is inserted into and mixes 150-250mm place in the bed of material.
Described electricity leads-and the electric capacity composite structure is to adopt the electric capacity-electricity of planar annular electrode to lead composite structure, namely share a planar annular electrode, switch by electronic switch, the planar annular electrode is inserted electrical conductivity measurement circuit and capacitance measurement circuit respectively, measure respectively, numerical value is determined to measure in comparison revision back.Described fixed support adopts hollow fixed support, connects lead and is convenient to pass in fixed support; The lead that connects sensor and metering circuit will be selected shielding line for use.
Sinter mixture of the present invention is finished physical mixed and moisture interpolation in the sintering cylinder, at present neutron, infrared, the online drimeter of microwave are to carry out moisture measurement above being installed in the outer output material belt of cylinder, therefore, when carrying out the moisture adjusting, have hysteresis phenomenon, be 90 seconds general retardation time.Electricity is led the sampling method complicated in mechanical structure, the failure rate height; The specific inductive capacity method is applicable to measures liquid and non-solid.
Advantage of the present invention:
(1) the moisture measurement probe placement can realize real-time online measuring moisture in the sintered compound feed roller, and insert to mix bed of material 150-250mm, is placed on cylinder with other device for measuring moisture and compares outward, has eliminated moisture measurement retardation time.
(2) structure of moisture measurement probe is that electricity is led-the electric capacity combined type, and the moisture measurement disturbing factor reduces, and production cost reduces, and is easy to safeguard.
Description of drawings
Fig. 1 is moisture measurement probe mounting structure synoptic diagram.
Fig. 2 is that electricity is led-electric capacity composite structure synoptic diagram.
(1) sintered compound feed roller, (2) fixation wall, (3) fixed support, (4) moisture measurement probe, (5) sinter mixture, (6) planar annular electrode, (7) spheric probe shell in the drawings.
Embodiment
As shown in Figure 1, the present invention is made up of survey sensor probe (4) and fixed support (3).Survey sensor adopts electricity to lead-the electric capacity composite structure, namely share a planar annular electrode, switch by electronic switch, the planar annular electrode is inserted electrical conductivity measurement circuit and capacitance measurement circuit respectively, measure respectively, numerical value is determined to measure in comparison revision back.
As shown in Figure 2, the survey sensor probe adopts wear-resisting ball-type structure, and spherical structure can reduce compound to the impulsive force of probe.Sensor probe inside is planar annular electrode (6), adopts wear-resistingly, antirust, and the material of conduction is formed.Shell is spherical (7), adopt wear-resisting, the material that physical property is stable.By fixed support (3) the survey sensor probe is installed in compound cylinder (1) inside, is inserted into and mixes 150-250mm place in the bed of material.Fixed support (3) adopts hollow fixed support, connects lead and is convenient to pass in fixed support; The lead that connects sensor and metering circuit will be selected shielding line for use.
Survey sensor probe placement (1) in the sintered compound cylinder is measured, eliminated retardation time, can realize real-time online measuring moisture.Because sensor is placed on mixing drum inside, will pay special attention to during installation: fixed support requires hollow, and requiring to connect lead can pass in fixed support; Support is unsuitable long, and avoid as far as possible and reduce mechanical vibration, but can not be too short, guarantee that spherical detector inserts the degree of depth in the sintered mix; Point of fixity should be selected in the place that is easy to installation and maintenance, firm stable; The lead that connects sensor and metering circuit will be selected shielding line for use, reduces the interference that external environment condition causes measurement.
The structure of sintering moisture measurement probe adopts electricity to lead-the electric capacity composite structure, take full advantage of electricity and lead characteristics separately with these two kinds of material moisture measuring methods of electric capacity, compensation mutually reduces the influence that external factor such as material compacting degree, sensor and material contact condition cause measurement.At temperature sensor of the inner installation of spheric probe, can gather in real time material temperature, with software approach moisture measurement is carried out temperature compensation, the final realization carried out fast sintered mixture moisture, and be stable, accurate measurement.
Adopt the electric capacity-electricity of planar annular electrode to lead composite structure, share a planar annular electrode, switch by electronic switch, the planar annular electrode is inserted electrical conductivity measurement circuit and capacitance measurement circuit respectively.Along with the increase of moisture, the material conductivity increases, and the resistance at electrode two ends reduces, and that is to say, along with the increase of moisture, resistance reduces, and the signal voltage that obtains reduces.For surveying capacitive circuit, along with the increase of moisture, the concussion frequency of surveying capacitive circuit increases, and signal increases.Along with the increase of material compacting degree, i.e. the increase of stockpile ratio, to the influence of measuring-signal be: the signal that electrical conductivity measurement circuit obtains reduces; The signal that capacitance measurement circuit obtains increases; Can find out the influence of two circuit of stockpile comparison by experiment, thus the influence of compensation material packing to measuring.
Claims (2)
1. the measuring method of sintered mixture moisture is made up of survey sensor probe and fixed support, it is characterized in that the survey sensor probe adopts electricity to lead-the electric capacity composite structure; The survey sensor probe adopts wear-resisting ball-type structure, by fixed support the survey sensor probe is installed in compound cylinder inside, is inserted into and mixes 150-250mm place in the bed of material; Described electricity leads-and the electric capacity composite structure is to adopt the electricity of planar annular electrode to lead-the electric capacity composite structure, namely share a planar annular electrode, switch by electronic switch, the planar annular electrode is inserted electrical conductivity measurement circuit and capacitance measurement circuit respectively, measure respectively, numerical value is determined to measure in comparison revision back.
2. the measuring method of sintered mixture moisture as claimed in claim 1 is characterized in that described fixed support adopts hollow fixed support, connects lead and is convenient to pass in fixed support; Connect being connected lead and will selecting shielding line for use of survey sensor probe and metering circuit.
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| CN 201110431810 CN102565141B (en) | 2011-12-21 | 2011-12-21 | Method for measuring moisture of sintered mixture |
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| CN 201110431810 CN102565141B (en) | 2011-12-21 | 2011-12-21 | Method for measuring moisture of sintered mixture |
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| CN102565141B true CN102565141B (en) | 2013-10-09 |
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| CN108195201B (en) * | 2017-11-23 | 2023-10-27 | 中冶长天国际工程有限责任公司 | Self-adaptive control type gas injection device and method based on charge level video recognition |
| CN110007058A (en) * | 2019-02-28 | 2019-07-12 | 苏州西热节能环保技术有限公司 | The method for real-time measurement of moisture content in a kind of burning power plant fuel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201834A (en) * | 1998-05-05 | 1998-12-16 | 冶金工业部钢铁研究总院 | Method and apparatus for online testing and regulating water content of sintered complex materials |
| CN1391101A (en) * | 2002-07-23 | 2003-01-15 | 东华大学 | In-line measuring-controlling device for water content in mixing moulding sand and its operating method |
| CN201429789Y (en) * | 2009-06-24 | 2010-03-24 | 北京宇宏泰测控技术有限公司 | Infrared moisture measuring and control system for mixtures |
| CN101788441A (en) * | 2009-12-30 | 2010-07-28 | 首钢总公司 | Device and method for determining moisture content and size composition of sinter mixture |
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- 2011-12-21 CN CN 201110431810 patent/CN102565141B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201834A (en) * | 1998-05-05 | 1998-12-16 | 冶金工业部钢铁研究总院 | Method and apparatus for online testing and regulating water content of sintered complex materials |
| CN1391101A (en) * | 2002-07-23 | 2003-01-15 | 东华大学 | In-line measuring-controlling device for water content in mixing moulding sand and its operating method |
| CN201429789Y (en) * | 2009-06-24 | 2010-03-24 | 北京宇宏泰测控技术有限公司 | Infrared moisture measuring and control system for mixtures |
| CN101788441A (en) * | 2009-12-30 | 2010-07-28 | 首钢总公司 | Device and method for determining moisture content and size composition of sinter mixture |
Non-Patent Citations (2)
| Title |
|---|
| 刘金刚等.烧结混合料水含量测量方法综述.《中国冶金》.2005,第15卷(第9期),第14-18页. |
| 烧结混合料水含量测量方法综述;刘金刚等;《中国冶金》;20050930;第15卷(第9期);第14-18页 * |
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