阅读说明：本技术 一种非接触式下水口渣线部位测温装置及渣线调整方法 (Non-contact type temperature measuring device for slag line part of lower nozzle and slag line adjusting method ) 是由 史辰庭 马立军 于 2021-05-17 设计创作，主要内容包括：本发明公开了一种非接触式下水口渣线部位测温装置及渣线调整方法,该测温装置包括三组螺旋环绕在渣线与下水口渣线部位的上、中、下三部分的测温丝,三组测温丝的接头分别与阻值转换器相连接；阻值转换器连接温度显示器。当三组测温丝反馈的温度升高至980℃时,提升中包车高度,下水口随之提高,渣线即为错开；当温度为950℃时需进行下一道渣线浇铸,错渣线后显示器上对应渣线温度将重新进行测量,并显示新渣线处所对应的温度；通过新渣线处所对应的温度监测渣线是否错开。本发明可根据温度值的变化可以预测渣线侵蚀程度,操作人员可以提前进行措渣线以防止渣线穿眼,达到延长下水口使用寿命,进而避免了下水口穿眼造成钢液二次氧化及夹杂,保证了生产顺行。(The invention discloses a non-contact temperature measuring device for a slag line part of a lower nozzle and a slag line adjusting method, wherein the temperature measuring device comprises three groups of temperature measuring wires spirally surrounding the upper part, the middle part and the lower part of the slag line part of the lower nozzle, and joints of the three groups of temperature measuring wires are respectively connected with a resistance converter; the resistance converter is connected with the temperature display. When the temperature fed back by the three groups of temperature measuring wires rises to 980 ℃, the height of the tundish car is increased, the water outlet is increased accordingly, and the slag lines are staggered; when the temperature is 950 ℃, the next slag line casting is needed, the temperature of the corresponding slag line on the display is measured again after the slag line is staggered, and the temperature corresponding to the new slag line is displayed; and monitoring whether the slag lines are staggered or not through the temperature corresponding to the new slag line. According to the invention, the erosion degree of the slag line can be predicted according to the change of the temperature value, and an operator can measure the slag line in advance to prevent the slag line from perforating, so that the service life of the drainage port is prolonged, the secondary oxidation and inclusion of molten steel caused by the perforation of the drainage port are avoided, and the smooth production is ensured.)

1. A non-contact temperature measuring device for a slag line part of a lower nozzle comprises three groups of spirally-wound temperature measuring wires, wherein the three groups of spirally-wound temperature measuring wires are spirally wound between a slag line and the lower nozzle; three groups of temperature measuring wire joints are led out from the middle upper part of the water gap; the three groups of temperature measuring wire connectors are respectively connected with the resistance value converter; the resistance converter is connected with the temperature display; the slag line part is divided into an upper part, a middle part and a lower part which are equal in height, and three groups of temperature measuring wires are spirally wound on the upper part, the middle part and the lower part respectively.

2. The non-contact type slag line temperature measuring device for the lower nozzle according to claim 1, characterized in that: each part having a height of 50 mm.

3. The non-contact type slag line temperature measuring device for the lower nozzle according to claim 1, characterized in that: the helix angle is 45 degrees, and the distance between adjacent temperature measuring wires is 10 mm.

4. A slag line adjusting method based on the non-contact type lower nozzle slag line position temperature measuring device; the method is characterized in that: when the temperature fed back by the three groups of temperature measuring wires rises to 980 ℃, the slag line layer of the erosion-resistant slag line of the slag line is seriously eroded, the operation of slag line staggering is required, namely, the height of the tundish car is increased, the water outlet is increased, and the slag lines are staggered; when the temperature is 950 ℃, the next slag line casting is needed, the temperature of the corresponding slag line on the display is measured again after the slag line is staggered, and the temperature corresponding to the new slag line is displayed; whether the slag lines are staggered or not is monitored through the temperature corresponding to the new slag lines, if the slag lines are not staggered, a high-temperature numerical value is displayed by a display, and in the condition, the slag lines are not staggered due to the fact that the position of the tundish car is unlocked, and the tundish car and the wrong slag lines are required to be lifted again.

Technical Field

The invention belongs to the technical field of slab continuous casting, and particularly relates to a non-contact type temperature measuring device for a slag line part of a drainage port and a slag line adjusting method.

Background

For the slab continuous casting process, the quality of refractory is an important factor for ensuring smooth production, and the used drain nozzle is in direct contact with molten steel and casting powder, so the contact part is seriously oxidized and eroded by high temperature, the serious drain nozzle is penetrated, the production is interrupted, and the slag line part of the drain nozzle needs to use special refractory to prolong the service life of the drain nozzle. The invention relates to a non-contact type temperature measuring device for a slag line part of a drainage port and a slag line adjusting method.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a non-contact type temperature measuring device for a slag line part of a casting nozzle of a slab continuous casting and a slag line adjusting method, which can prevent the casting nozzle of the slab continuous casting from perforating and prolong the service life.

The invention is realized in this way, a non-contact temperature measuring device for the slag line part of the lower nozzle, which comprises three groups of spirally-wound temperature measuring wires, wherein the three groups of spirally-wound temperature measuring wires are spirally wound between the slag line and the lower nozzle; three groups of temperature measuring wire joints are led out from the middle upper part of the water gap; the three groups of temperature measuring wire connectors are respectively connected with the resistance value converter; the resistance converter is connected with the temperature display; the slag line part is divided into an upper part, a middle part and a lower part which are equal in height, and three groups of temperature measuring wires are spirally wound on the upper part, the middle part and the lower part respectively.

Preferably, each portion has a height of 50 mm.

Preferably, the helix angle is 45 degrees and the spacing between adjacent temperature wires is 10 mm.

A slag line adjusting method based on the non-contact type lower nozzle slag line position temperature measuring device; the method is characterized in that: when the temperature fed back by the three groups of temperature measuring wires rises to 980 ℃, the slag line layer of the erosion-resistant slag line of the slag line is seriously eroded, the operation of slag line staggering is required, namely, the height of the tundish car is increased, the water outlet is increased, and the slag lines are staggered; when the temperature is 950 ℃, the next slag line casting is needed, the temperature of the corresponding slag line on the display is measured again after the slag line is staggered, and the temperature corresponding to the new slag line is displayed; whether the slag lines are staggered or not is monitored through the temperature corresponding to the new slag lines, if the slag lines are not staggered, a high-temperature numerical value (namely the position of the original slag lines) is displayed by the display, and in the condition, the slag lines are not staggered due to the fact that the position of the tundish car is unlocked, and the tundish car and the staggered slag lines are required to be lifted again.

The invention has the advantages and technical effects that: the invention is mainly characterized in that:

1. the temperature measurement at the slag line is accurate and stable, the maximum limit value of the temperature is specified to be 980 ℃, the temperature value of the slag line is regulated to be 950 ℃, so that each slag line can be used to the maximum extent, and the refractory material of the water gap is fully utilized;

2. because the temperature measurement is accurate and stable, the erosion degree of the slag line is controllable, and the problem that the distance between every two slag lines is overlarge due to the uncontrollable and unknown erosion of the slag line is solved;

3. after the erosion of the slag line is controllable, the distance between the slag lines is reduced, the distance is reduced at the slag line with the same height, the number of the slag lines is increased, and the service life of the water outlet is greatly prolonged;

4. after the process is applied, the service life of the drain nozzle used in the slab continuous casting is greatly prolonged, the refractory material cost is saved, and the cost per ton of steel is reduced;

through above-mentioned technical scheme, can predict slag line erosion degree according to the change of temperature value, operating personnel can measure the slag line in advance in order to prevent that the slag line from wearing the eye, reaches extension outlet of a river life, and then has avoided the outlet of a river to wear the eye and cause molten steel secondary oxidation and mix with, has guaranteed the production and has gone forward.

Drawings

FIG. 1 is a schematic diagram of the present invention.

In the figure, 1, a water outlet; 2. measuring temperature; 3. a resistance value converter; 4. temperature display, A, upper part; B. a middle part; C. a lower part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides a non-contact type temperature measuring device for a slag line part of a drainage nozzle and a slag line adjusting method, aiming at researching the slag line part of the drainage nozzle, wherein the slag line part adopts a zirconia refractory material with the thickness of 25mm and the wall thickness of the water nozzle refractory material of 35mm, and the slag line part adopts the zirconia refractory material with the thickness of 25mm and the wall thickness of the water nozzle refractory material of 35mm, so that the non-contact type temperature measuring device for the slag line part of the drainage nozzle and the slag line adjusting method can prevent the drainage nozzle of slab continuous casting from perforating and prolong the service life, and the specific contents are as follows:

referring to fig. 1, a non-contact temperature measuring device for a slag line of a drain comprises three sets of spirally wound temperature measuring wires made of platinum-rhodium alloy, wherein the platinum-rhodium alloy contains 30% rhodium, 70% platinum and has a diameter of 0.5 mm. Three groups of spirally-wound temperature measuring wires are spirally wound between the slag line and the lower water gap 1; three groups of temperature measuring wire joints are led out from the middle upper part of the water gap; the three groups of temperature measuring wire joints are respectively connected with the resistance value converter 3, namely temperature measuring signals are converted into readable temperature signals which are displayed on a display; the resistance converter is connected with the temperature display 4, and the resistance converter is converted into a temperature curve and an actual value and is displayed by the display; the slag line part is divided into an upper part A, a middle part B and a lower part C which are equal in height, and three groups of temperature measuring wires are spirally wound on the upper part, the middle part and the lower part respectively. In production, the lower nozzle is heated to a certain temperature, so that the three groups of temperature measuring wires can detect the temperature values of the slag lines in the three areas.

Preferably, each portion has a height of 50 mm.

Preferably, the helix angle is 45 degrees and the spacing between adjacent temperature wires is 10 mm.

A slag line adjusting method based on the non-contact type lower nozzle slag line position temperature measuring device; the temperature measuring wires have strong high temperature resistance, the temperature measured by the system rises along with the continuous erosion of the slag line part, when the temperature fed back by the three groups of temperature measuring wires rises to 980 ℃, the slag line erosion-resistant slag line layer of the slag line is shown to be seriously eroded, the slag line staggering operation is carried out, namely, the height of the tundish car is increased, the water outlet is increased along with the increase, and the slag lines are staggered; in order to ensure that the production is smooth, the next slag line casting is needed when the temperature is 950 ℃, the temperature of the corresponding slag line on the display is measured again after the slag line is staggered, and the temperature corresponding to the new slag line is displayed; whether the slag lines are staggered or not is monitored through the temperature corresponding to the new slag lines, if the slag lines are not staggered, a high-temperature numerical value (namely the position of the original slag lines) is displayed by the display, and in the condition, the slag lines are not staggered due to the fact that the position of the tundish car is unlocked, and the tundish car and the staggered slag lines are required to be lifted again. Like this at the at utmost make full use of mouth of a river slag line position, avoided the too big condition of slag line interval under the monitoring condition not, and then make the mouth of a river several slag lines of staggering more that can, the online life of mouth of a river obtains the extension, has finally practiced thrift the refractory material cost down, has also avoided the mouth of a river to wear the secondary oxidation and mix with that the eye brought to the molten steel simultaneously, has avoided the mouth of a river to wear the production interrupt that the eye caused. The three temperature measuring wires are independent and do not interfere with each other, so that the accuracy and reliability of temperature measurement are ensured.

Specific examples are as follows:

example 1:

the AH36 steel grade production method comprises the following steps of producing a casting time by using a total 42 furnaces according to the following components, changing two nozzles in the original production process every 21 furnaces, changing three slag lines at each nozzle, namely, once every 7 furnaces and once every 30mm, and ensuring that the slag line interval is 30mm because the serious corrosion of each slag line cannot be monitored.

After the technology is applied, AH36 is produced for a total of 54 furnaces, one water gap is used, slag lines are arranged once every 9 furnaces, the slag line interval is 15mm, 6 slag lines are totally arranged, the slag line intervals are uniform, the depth is consistent, and no perforation condition exists.

Steel grade

C

Si

Mn

P

S

Alt

Nb

AH36

0.12/0.16

0.18/0.30

1.35/1.47

≤0.020

≤0.015

0.020/0.040

0.015/0.030

Example 2:

the steel type DH32-AB is produced by the following components, a total pouring time is 42 furnaces, two water gaps are used in the original production process, the water gaps are changed once every 21 furnaces, three slag lines are arranged at each water gap, namely, the slag lines are arranged at intervals of 7 furnaces, the distance between the slag lines is 30mm, and the most guarantee is made for ensuring the smooth production because whether each slag line is seriously corroded.

After the technology is applied, AH36 is produced for a total of 54 furnaces, one water gap is used, slag lines are arranged once every 9 furnaces, the slag line interval is 15mm, 6 slag lines are totally arranged, the slag line intervals are uniform, the depth is consistent, and no perforation condition exists.

Steel grade

C

Si

Mn

P

S

Alt

Nb

DH32-AB

0.12/0.16

0.18/0.30

1.10/1.22

≤0.020

≤0.015

0.020/0.040

0.010/0.025

Example 3:

the steel grade Q460C-2 is produced by the following components, a total pouring time is 42 furnaces, two nozzles are used in the original production process, the nozzles are changed once every 21 furnaces, three slag lines are arranged at each nozzle, namely, slag lines are arranged at intervals of 7 furnaces, the distance between the slag lines is 30mm, and the maximum guarantee is provided for establishing the 30mm distance between the slag lines because whether each slag line is seriously corroded can not be monitored.

After the technology is applied, AH36 is produced for a total of 54 furnaces, one water gap is used, slag lines are arranged once every 9 furnaces, the slag line interval is 15mm, 6 slag lines are totally arranged, the slag line intervals are uniform, the depth is consistent, and no perforation condition exists.

Steel grade

C

Si

Mn

P

S

Alt

Nb

Q460C-2

0.15/0.19

0.28/0.40

1.55/1.67

≤0.025

≤0.025

0.020/0.050

0.030/0.045

In conclusion, the technology is used for the slab continuous casting nozzle, the hole penetration condition does not occur, the service life of the nozzle is prolonged from the previous 21 furnaces to the 54 furnaces, and the casting service time of each furnace is 25.5 minutes when the casting speed is 1.1m/min, so that the service life of the nozzle is prolonged from 535.5 minutes to 1377 minutes, the refractory cost is greatly reduced, and the smooth production is ensured.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.