CN109186793A - A kind of measuring method of metallurgical melt heat preserving agent thermal insulation property - Google Patents

A kind of measuring method of metallurgical melt heat preserving agent thermal insulation property Download PDF

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Publication number
CN109186793A
CN109186793A CN201811025403.6A CN201811025403A CN109186793A CN 109186793 A CN109186793 A CN 109186793A CN 201811025403 A CN201811025403 A CN 201811025403A CN 109186793 A CN109186793 A CN 109186793A
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China
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temperature
heat preserving
preserving agent
galvanic couple
thermometric
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CN201811025403.6A
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CN109186793B (en
Inventor
王向锋
马光宇
刘常鹏
徐鹏飞
李卫东
孙守斌
张天赋
赵俣
钱峰
朱维东
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Angang Steel Co Ltd
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Angang Steel Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

1# thermometric galvanic couple, 2# thermometric galvanic couple, moisture recorder are connect by a kind of measuring method of metallurgical melt heat preserving agent thermal insulation property with control computer；It is smelted according to test steel smelting program, smelts tapping；A pitting is dug out into high temperature steel ingot central area, 1# thermometric galvanic couple is inserted and fixed；Heat preserving agent is poured at ingot mould riser, 2# thermometric galvanic couple is inserted under heat preserving agent surface at about 2~5mm；It is measured by 1# thermometric galvanic couple, 2# thermometric galvanic couple；Calculate the average rate of temperature fall M of the steel ingot after heat preserving agent is added and the insulating power attenuation degree R of heat preserving agent；To characterize the thermal insulation property of the type hot-metal insulating agent and the stability of thermal insulation property.The present invention solves the problems, such as that the prior art cannot characterize insulating power measurement of hot-metal insulating agent under the conditions of real work range temperature.The present invention is adaptable, is not influenced by heat preserving agent ingredient and physical state, the lateral comparison suitable for variety classes hot-metal insulating agent thermal insulation property.

Description

A kind of measuring method of metallurgical melt heat preserving agent thermal insulation property
Technical field
The present invention relates to metallurgical melt field of thermal insulation more particularly to a kind of measurement sides of metallurgical melt heat preserving agent thermal insulation property Method.
Background technique
Hot-metal bottle, fish torpedo ladle are sent to lower one as one of iron-smelter basic equipment by the molten iron of blast fumance In process, inevitable that iron loss and temperature reduce, i.e. the loss of heat.Comparatively, open-top ladle due to Heat-retaining condition is poor, and hot metal temperature drop is apparently higher than fish torpedo ladle under equal conditions.
Influence of the height of molten iron temperature to steel-making is very big.According to converter smelting process, the heat of converter smelting comes substantially Derived from the physical thermal and chemical heat of molten iron.Under conditions of chemical heat is certain, the physical thermal of molten iron is to determine that can smelting direct motion Key factor.Molten iron temperature is low to will cause that converter blow loss is big, steel technology is high, steel quality is without ensureing and furnace life decline Etc. consequences.Molten iron temperature is not only particularly significant to process for making, also has an impact for hot metal transport.If molten iron is in transmission process Medium temperature is spent low, will cause crust, the dross of hot-metal ladle and carriage, directly affects normal production operation.
To make full use of molten iron heat, guarantee that variety steel is normally smelted, while achieving the purpose that reduce energy consumption, smelter By the way that all kinds of heat preserving agents, such as carbonization rice husk, flyash, complex heat-preservation agent are added to molten iron, hence it is evident that reduce hot metal temperature drop width Degree meets the requirement made steel to molten iron temperature.
But have no the measuring method standard of hot-metal insulating agent thermal insulation property at present both at home and abroad, it can only be by ingredient, density, low The thermal insulation property of the methods of temperature measurement prediction heat preserving agent cannot actually use temperature range in hot-metal insulating and carry out quantitatively characterizing, Lateral comparison can not be carried out to the thermal insulation property of variety classes heat preserving agent.
In conclusion the heat insulating ability of hot-metal insulating agent cannot be measured effectively in the prior art, cannot especially be protected in molten iron Temperature actual use temperature range carries out quantitatively characterizing, needs to research and develop a kind of guarantor for suiting heat preserving agent actual use temperature range Warm nature energy measuring method.
Summary of the invention
The purpose of the present invention is to provide a kind of measuring methods of metallurgical melt heat preserving agent thermal insulation property, overcome the prior art Existing deficiency, it is easy to use, it is at low cost, it is adaptable, do not influenced by heat preserving agent ingredient and physical state, it can be achieved that Insulating power measurement under the conditions of real work range temperature.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of measuring method of metallurgical melt heat preserving agent thermal insulation property, includes the following steps:
1) 1# thermometric galvanic couple, 2# thermometric galvanic couple, moisture recorder are connect with control computer；
2) it is smelted in vacuum smelting furnace according to test steel smelting program, is tapped after smelting；
3) the high temperature ingot mould terminated will be smelted and is hoisted to temperature area to be measured, sink head brick is removed, shell has been solidified High temperature surface of steel ingot is exposed；
4) a pitting is dug out into high temperature steel ingot central area, then 1# thermometric galvanic couple is inserted into and is consolidated by depth at least 5mm Fixed, steel ingot temperature-measuring results are denoted as T1；
5) heat preserving agent is poured at ingot mould riser, and spread out it is even, then will 2# thermometric galvanic couple be inserted into heat preserving agent surface under about 2 At~5mm, heat preserving agent temperature-measuring results are denoted as T2；
6) start thermometric, dropped to until steel ingot terminates temperature until 1# thermometric galvanic couple, 2# thermometric galvanic couple displays temperature； 1# thermometric galvanic couple measurement result is steel ingot temperature, is denoted as T when the time is t1t, as t=0, steel ingot temperature is initial measurement temperature Degree, is denoted as T10, steel ingot temperature is denoted as T when steel ingot terminates thermometric1n；The measurement result of 2# thermometric galvanic couple be heat preserving agent temperature, when Between be t when measurement result be denoted as T2t, as t=0, heat preserving agent temperature is initial measuring temperature, is denoted as T20, when terminating thermometric Heat preserving agent temperature is denoted as T2n；T10、T20Value range is 1150-1050 DEG C, T1n、T2nValue range is 650-550 DEG C, total to survey The warm time is denoted as tn；
7) the average rate of temperature fall within the scope of measuring temperature of the steel ingot after addition heat preserving agent is denoted as M, then M can be as follows It calculates:
8) insulating power attenuation degree of heat preserving agent under the conditions of different time of measuring corresponding temperatures is denoted as R, then the time is t When heat preserving agent insulating power attenuation degree R can be calculated as follows:
9) the type molten iron finally is characterized so that the average rate of temperature fall M within the scope of measuring temperature of the steel ingot after heat preserving agent is added Heat preserving agent operating temperature range thermal insulation property, with insulating power attenuation degree R table of the heat preserving agent under condition of different temperatures The type hot-metal insulating agent is levied in the stability of the thermal insulation property of operating temperature range.
The thermometric galvanic couple is K-type thermocouple.
The steel ingot is ordinary carbon steel or mild steel.
Compared with prior art, the beneficial effects of the present invention are:
1) insulating power of hot-metal insulating agent under the conditions of real work range temperature cannot be characterized by solving the prior art The problem of measurement.
2) experimental condition of measuring method of the invention relies primarily on smelter equipment of itself, easy to use, at low cost, It is adaptable, it is not influenced by heat preserving agent ingredient and physical state, is particularly suitable for variety classes hot-metal insulating agent heat insulating ability The lateral comparison of energy, and this point is that other methods hardly match.
Specific embodiment
Specific embodiments of the present invention will be further explained below:
A kind of measuring method of metallurgical melt heat preserving agent thermal insulation property, includes the following steps:
1) 1# thermometric galvanic couple, 2# thermometric galvanic couple, moisture recorder are connect with control computer.Claim according to ingot casting riser depth Heat preserving agent is taken, heat preserving agent additional amount is ingot casting riser depth 30-100mm.
2) it is smelted in vacuum smelting furnace according to test steel smelting program, is tapped after smelting.
3) the rigid high temperature ingot mould terminated of smelting is hoisted to temperature area to be measured using overhead traveling crane, sink head brick is removed, is made outer The high temperature surface of steel ingot that shell has solidified is exposed.
4) a pitting is dug out into high temperature steel ingot central area, then 1# thermometric galvanic couple is inserted into and is consolidated by depth at least 5mm Fixed, steel ingot temperature-measuring results are denoted as T1。
5) weighed heat preserving agent is poured at ingot mould riser, and spread out it is even, then by 2# thermometric galvanic couple be inserted into heat preserving agent Under surface at about 2~5mm, heat preserving agent temperature-measuring results are denoted as T2。
6) start thermometric, dropped to until steel ingot terminates temperature until 1# thermometric galvanic couple, 2# thermometric galvanic couple displays temperature； 1# thermometric galvanic couple measurement result is steel ingot temperature, is denoted as T when the time is t1t, as t=0, steel ingot temperature is initial measurement temperature Degree, is denoted as T10, steel ingot temperature is denoted as T when steel ingot terminates thermometric1n；The measurement result of 2# thermometric galvanic couple be heat preserving agent temperature, when Between be t when measurement result be denoted as T2t, as t=0, heat preserving agent temperature is initial measuring temperature, is denoted as T20, when terminating thermometric Heat preserving agent temperature is denoted as T2n；T10、T20Value range is 1150-1050 DEG C, T1n、T2nValue range is 650-550 DEG C, total to survey The warm time is denoted as tn；
7) the average rate of temperature fall within the scope of measuring temperature of the steel ingot after addition heat preserving agent is denoted as M, then M can be as follows It calculates:
8) insulating power attenuation degree of heat preserving agent under the conditions of different time of measuring corresponding temperatures is denoted as R, then the time is t When heat preserving agent insulating power attenuation degree R can be calculated as follows:
9) the type molten iron finally is characterized so that the average rate of temperature fall M within the scope of measuring temperature of the steel ingot after heat preserving agent is added Heat preserving agent operating temperature range thermal insulation property, with insulating power attenuation degree R table of the heat preserving agent under condition of different temperatures The type hot-metal insulating agent is levied in the stability of the thermal insulation property of operating temperature range.
The thermometric galvanic couple is K-type thermocouple.
The steel ingot is ordinary carbon steel or mild steel.
Embodiment 1:
A kind of measuring method of metallurgical melt heat preserving agent thermal insulation property, comprising the following steps:
1) 1# thermometric galvanic couple, 2# thermometric galvanic couple, moisture recorder etc. are connect with control computer.
2) quantitative hot-metal insulating agent-carbonization rice husk is weighed.
3) it is smelted in vacuum smelting furnace according to test steel smelting program, is tapped after smelting.
4) the rigid high temperature ingot mould terminated of smelting is hoisted to temperature area to be measured using overhead traveling crane, sink head brick is removed, is made outer The high temperature surface of steel ingot that shell has solidified is exposed.
5) a pitting is dug out into high temperature steel ingot central area, then 1# thermometric galvanic couple is inserted and fixed by depth 6mm.
6) weighed heat preserving agent is poured at ingot mould riser, and spread out it is even, then by 2# thermometric galvanic couple be inserted into heat preserving agent Under surface at about 4mm.
7) start thermometric, until 1# thermometric galvanic couple, 2# thermometric galvanic couple displays temperature drop to 600 DEG C.
8) rate of temperature fall of the ingot casting after addition heat preserving agent between 1100 DEG C to 600 DEG C is calculated, obtains phase equality of temperature The rate of temperature fall for spending section, the thermal insulation property of heat preserving agent is characterized with this.
20 DEG C of determination of the environment temperature.
Steel ingot is straight carbon steel.
It is computed, the average rate of temperature fall M of experiment heat preserving agent carbonization rice husk is 0.13 DEG C/min, and carbonization rice husk is by 1100 DEG C Insulating power attenuation degree R when being cooled to 600 DEG C is 41.52%.

Claims (3)

1. a kind of measuring method of metallurgical melt heat preserving agent thermal insulation property, which comprises the steps of:
1) 1# thermometric galvanic couple, 2# thermometric galvanic couple, moisture recorder are connect with control computer；
2) it is smelted in vacuum smelting furnace according to test steel smelting program, is tapped after smelting；
3) the high temperature ingot mould terminated will be smelted and is hoisted to temperature area to be measured, sink head brick removed, the high temperature for having solidified shell Surface of steel ingot is exposed；
4) pitting is dug out into high temperature steel ingot central area, then 1# thermometric galvanic couple is inserted and fixed by depth at least 5mm, Steel ingot temperature-measuring results are denoted as T1；
5) heat preserving agent is poured at ingot mould riser, and spread out it is even, then by 2# thermometric galvanic couple be inserted into heat preserving agent surface under about 2~ At 5mm, heat preserving agent temperature-measuring results are denoted as T2；
6) start thermometric, dropped to until steel ingot terminates temperature until 1# thermometric galvanic couple, 2# thermometric galvanic couple displays temperature；1# is surveyed Warm galvanic couple measurement result is steel ingot temperature, is denoted as T when the time is t1t, as t=0, steel ingot temperature is initial measuring temperature, note For T10, steel ingot temperature is denoted as T when steel ingot terminates thermometric1n；The measurement result of 2# thermometric galvanic couple is heat preserving agent temperature, is t in the time When measurement result be denoted as T2t, as t=0, heat preserving agent temperature is initial measuring temperature, is denoted as T20, terminate heat preserving agent when thermometric Temperature is denoted as T2n；T10、T20Value range is 1150-1050 DEG C, T1n、T2nValue range is 650-550 DEG C, total thermometric time note For tn；
7) the average rate of temperature fall within the scope of measuring temperature of the steel ingot after addition heat preserving agent is denoted as M, then M can be counted as follows It calculates:
8) insulating power attenuation degree of heat preserving agent under the conditions of different time of measuring corresponding temperatures is denoted as R, then protects when the time is t Warm agent insulating power attenuation degree R can be calculated as follows:
9) the type hot-metal insulating finally is characterized so that the average rate of temperature fall M within the scope of measuring temperature of the steel ingot after heat preserving agent is added Agent, should with insulating power attenuation degree R characterization of the heat preserving agent under condition of different temperatures in the thermal insulation property of operating temperature range Stability of the type hot-metal insulating agent in the thermal insulation property of operating temperature range.
2. a kind of measuring method of metallurgical melt heat preserving agent thermal insulation property according to claim 1, which is characterized in that described Thermometric galvanic couple is K-type thermocouple.
3. a kind of measuring method of metallurgical melt heat preserving agent thermal insulation property according to claim 1, which is characterized in that described Steel ingot is ordinary carbon steel or mild steel.
CN201811025403.6A 2018-09-04 2018-09-04 Method for measuring heat preservation performance of metallurgical melt heat preservation agent Active CN109186793B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59218259A (en) * 1983-05-24 1984-12-08 Fujikura Ltd Controlling method of casting temperature
CN101070223A (en) * 2007-06-29 2007-11-14 钢铁研究总院 Heat-processing temperature-cntrolled heat-insulation material, its preparing method and use
CN103361034A (en) * 2013-07-17 2013-10-23 河北联合大学 Irregular-particle-shaped Chinese chestnut involucre heat-preserving material
CN104198525A (en) * 2014-08-21 2014-12-10 河北联合大学 Comparison method for measuring heat retaining effects of metallurgical heat retaining materials
CN104503510A (en) * 2014-12-26 2015-04-08 北京神雾环境能源科技集团股份有限公司 Temperature synchronizing system and method used for metallurgic performance measuring device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59218259A (en) * 1983-05-24 1984-12-08 Fujikura Ltd Controlling method of casting temperature
CN101070223A (en) * 2007-06-29 2007-11-14 钢铁研究总院 Heat-processing temperature-cntrolled heat-insulation material, its preparing method and use
CN103361034A (en) * 2013-07-17 2013-10-23 河北联合大学 Irregular-particle-shaped Chinese chestnut involucre heat-preserving material
CN104198525A (en) * 2014-08-21 2014-12-10 河北联合大学 Comparison method for measuring heat retaining effects of metallurgical heat retaining materials
CN104503510A (en) * 2014-12-26 2015-04-08 北京神雾环境能源科技集团股份有限公司 Temperature synchronizing system and method used for metallurgic performance measuring device

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