阅读说明：本技术 一种铁矿石软熔性能的可视化测定装置及测定方法 (Visual determination device and determination method for iron ore softening and melting performance ) 是由 王来信 孙刘恒 赵奇强 赵国磊 常凤 王磊 于 2019-12-05 设计创作，主要内容包括：本发明公开了一种铁矿石软熔性能的可视化测定装置及测定方法,属于高炉冶炼技术领域。本发明包括卧式炉体,卧式炉体的内侧设置有试验炉炉膛,试验炉炉膛的外部安装有炉体加热元件,试验炉炉膛的一侧设置有相机,相机的输出端电连接有计算机控制系统,试验炉炉膛的输入端连接有供气系统,试验炉炉膛的内腔设置有试样。本发明通过计算机控制系统驱动供气系统控制流量,混气装置确保还原气体能均匀混合,气体加热装置保证该气体到达试样位置处时温度合格,通过相机针对软熔过程实时采集,计算机控制系统可自动对图像加以处理,剔除杂像,计算试样面积、生成面积收缩率曲线等,具有较高的自动化集成度。(The invention discloses a visual determination device and a visual determination method for iron ore reflow property, and belongs to the technical field of blast furnace smelting. The device comprises a horizontal furnace body, wherein a test furnace hearth is arranged on the inner side of the horizontal furnace body, a furnace body heating element is arranged outside the test furnace hearth, a camera is arranged on one side of the test furnace hearth, the output end of the camera is electrically connected with a computer control system, the input end of the test furnace hearth is connected with a gas supply system, and a sample is arranged in the inner cavity of the test furnace hearth. The computer control system drives the gas supply system to control the flow, the gas mixing device ensures that the reducing gas can be uniformly mixed, the gas heating device ensures that the temperature of the gas is qualified when the gas reaches the position of the sample, the camera is used for collecting the gas in real time aiming at the reflow process, the computer control system can automatically process the image, eliminate the parasitic image, calculate the area of the sample, generate the area shrinkage rate curve and the like, and the automatic integration level is higher.)

1. The utility model provides a visual survey device of iron ore soft melting performance, includes horizontal furnace body (1), its characterized in that: a furnace cover is arranged on one side of the horizontal furnace body (1), a sealed furnace cover cooling water inlet (8) and a sealed furnace cover cooling water outlet (9) are respectively arranged on the surface of the furnace cover, a furnace body cooling water inlet (6) and a furnace body cooling water outlet (7) are respectively arranged on the surface of the horizontal furnace body (1), a test furnace hearth (2) is arranged on the inner side of the horizontal furnace body (1), a furnace body heating element (13) is arranged outside the test furnace hearth (2), an image acquisition port (14) is arranged on one side of the test furnace hearth (2), a camera (15) is installed at the port of the image acquisition port (14), the output end of the camera (15) is electrically connected with a computer control system (16), the input end of the computer control system (16) is also connected with a hearth temperature measuring thermocouple (10), and the detection end of the hearth temperature measuring thermocouple (10) extends into the hearth (2) of the test furnace;

the inner chamber of test furnace (2) be connected with tail gas outlet (5), the input of test furnace (2) is connected with gas supply system (3), the input and the computer control system (16) electricity of gas supply system (3) are connected, the inner chamber demountable installation of test furnace (2) has test platform, reduction gas flow equalizing plate (12) has been placed on test platform's mesa, sample (11) have been placed on the face of reduction gas flow equalizing plate (12), the outside of sample (11) is provided with sample temperature thermocouple (4).

2. The apparatus according to claim 1, wherein the apparatus comprises: the test furnace hearth (2) is movably connected with the test platform, and the test platform is horizontally displaced along the inner cavity of the test furnace hearth (2).

3. The apparatus according to claim 1, wherein the apparatus comprises: the input ends of the furnace body cooling water inlet (6) and the sealed furnace cover cooling water inlet (8) are respectively communicated with a cooling water pipeline.

4. The apparatus according to claim 1, wherein the apparatus comprises: gas supply system (3) by gas cylinder (31), flowmeter (32), mix gas device (33) and gas heating device (34) and constitute, multiunit gas cylinder (31) are in the parallelly connected setting of the input of mixing gas device (33), flowmeter (32) are all installed to every group gas cylinder (31) and between mixing gas device (33), the output of mixing gas device (33) is connected with gas heating device (34), long section gas circuit between mixing gas device (33) and test furnace chamber (2) is gas heating device (34), the output of gas heating device (34) extends to in test furnace chamber (2).

5. The apparatus according to claim 4, wherein the apparatus comprises: the output end of the computer control system (16) is electrically connected with the flowmeter (32).

6. A method for measuring the iron ore soft melting performance by a visual measuring device is characterized in that: the method comprises the following steps:

the method comprises the following steps: the power supply is switched on, and the furnace body heating element (13) is controlled to heat the test furnace hearth (2) through the temperature rise control program of the computer control system (16);

step two: a furnace body cooling water inlet (6) and a sealed furnace cover cooling water inlet (8) are externally connected with a cooling water pipeline and supply cooling water;

step three: sequentially stacking a sample (11) and a reducing gas flow equalizing plate (12) on a test platform, and pushing the test platform into a test furnace hearth (2);

step four: cooling water enters the horizontal furnace body (1) from a furnace body cooling water inlet (6) and is discharged out of the horizontal furnace body (1) through a furnace body cooling water outlet (7) to form cooling of the horizontal furnace body (1), the cooling water enters the furnace cover from a sealed furnace cover cooling water inlet (8) and is discharged out of the furnace cover through a sealed furnace cover cooling water outlet (9) to form cooling of the furnace cover, and the cooling water continuously runs in an internal circulation mode;

step five: the computer control system (16) controls the air supply system (3) to supply air;

step six: reducing gas is filled in the gas bottle (31), the gas flows out of the gas bottle (31) and enters the flow meter (32), the opening degree of the flow meter (32) is controlled by the computer control system (16), the outlet of the flow meter (32) is connected with the gas mixing device (33), porous media or steel wire scraps are filled in the gas mixing device (33), and the gas is mixed by the gas mixing device (33) and then is output into the hearth (2) of the test furnace through the gas heating device (34) and reaches the position of the sample (11);

step seven: the camera (15) automatically adjusts the focal length according to the temperature and light conditions of the test furnace hearth (2) so as to obtain a clear image, and the acquired image is transmitted to the computer control system (16);

step eight: the computer control system (16) automatically processes the acquired image, including rejecting the miscellaneous image, calculating the area of the sample (11) and drawing the area shrinkage rate of the sample (11);

step nine: and after the test is finished, the computer control system (16) respectively controls the furnace body heating element (13) to stop heating and the gas supply system (3) to stop supplying gas.

7. The method according to claim 6, wherein the method comprises the steps of: the hearth temperature thermocouple (10) detects the real-time temperature of the hearth (2) of the test furnace and feeds back the real-time temperature to the computer control system (16), and the sample temperature thermocouple (4) detects the real-time temperature of the sample (11) and feeds back the real-time temperature to the computer control system (16).

Technical Field

The invention relates to the technical field of blast furnace smelting, in particular to a visual determination device and a visual determination method for iron ore reflow property.

Background

After the furnace charge is added from the top of the blast furnace, in the process of descending, the furnace charge is contacted with ascending coal gas to complete the processes of heat exchange, temperature rise, reduction, reflow and the like. Through the research of blast furnace anatomy, the shape and thickness of a reflow melting zone formed by iron ore reflow have important influence on the operation of the blast furnace and the stable and smooth running of the blast furnace. For the determination of the soft melting performance of the iron ore, at present, a vertical tube furnace is mostly adopted, a pressurizing rod is arranged, normal-temperature gas is introduced, the soft melting performance of the iron ore is measured in a weight loss curve or displacement change curve mode, and a method is provided for the determination of the soft melting performance of the iron ore. However, the currently used iron ore softening and melting property measuring device has some problems, such as: 1) the introduced reducing gas is normal temperature gas which is different from the actual condition in the furnace; 2) the flow of the air supply device is adjusted to be manually controlled; 3) the reflow process of the sample is invisible or the image is blurred by adopting X-ray shooting; 4) poor mixing of the reducing gas; 5) the automation integration level is not high.

Disclosure of Invention

1. Technical problem to be solved by the invention

Aiming at the defects and shortcomings in the prior art, the invention provides a visual determination device and a determination method for iron ore reflow performance.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention discloses a visual measuring device for iron ore reflow property, which comprises a horizontal furnace body, wherein a furnace cover is arranged on one side of the horizontal furnace body, a sealed furnace cover cooling water inlet and a sealed furnace cover cooling water outlet are respectively arranged on the surface of the furnace cover, a furnace body cooling water inlet and a furnace body cooling water outlet are respectively arranged on the surface of the horizontal furnace body, a test furnace hearth is arranged on the inner side of the horizontal furnace body, a furnace body heating element is arranged outside the test furnace hearth, an image acquisition port is arranged on one side of the test furnace hearth, a camera is arranged at the port of the image acquisition port, the output end of the camera is electrically connected with a computer control system, the input end of the computer control system is also connected with a hearth temperature measuring thermocouple, and the detection end of the hearth temperature measuring;

the inner chamber of test furnace be connected with the tail gas export, test furnace's input is connected with gas supply system, gas supply system's input and computer control system electricity are connected, test furnace's inner chamber demountable installation has test platform, has placed the reducing gas flow equalizing board on test platform's the mesa, has placed the sample on the face of reducing gas flow equalizing board, the outside of sample is provided with sample temperature thermocouple.

Further, test furnace and test platform swing joint, test platform is along the inner chamber horizontal displacement of test furnace.

Furthermore, the input ends of the furnace body cooling water inlet and the sealed furnace cover cooling water inlet are respectively communicated with a cooling water pipeline.

Further, the gas supply system constitute by gas cylinder, flowmeter, gas mixing device and gas heating device, the multiunit gas cylinder is in the parallelly connected setting of input of gas mixing device, every group gas cylinder and all install the flowmeter between the gas mixing device, the output of gas mixing device is connected with gas heating device, the long section gas circuit between gas mixing device and the test furnace chamber is gas heating device, gas heating device's output extends to in the test furnace chamber.

Further, the output end of the computer control system is electrically connected with the flowmeter.

A method for measuring the iron ore softening and melting performance by a visual measuring device comprises the following steps:

the method comprises the following steps: switching on a power supply, and controlling a furnace body heating element to heat a test furnace hearth through a temperature rise control program of a computer control system;

step two: the furnace body cooling water inlet and the sealed furnace cover cooling water inlet are externally connected with cooling water pipelines and supply cooling water;

step three: sequentially stacking the sample and the reducing gas flow equalizing plate on a test platform, and pushing the test platform into a hearth of a test furnace;

step four: cooling water enters the horizontal furnace body from a furnace body cooling water inlet and is discharged out of the horizontal furnace body through a furnace body cooling water outlet to form cooling of the horizontal furnace body, the cooling water enters the furnace cover from a sealed furnace cover cooling water inlet and is discharged out of the furnace cover through a sealed furnace cover cooling water outlet to form cooling of the furnace cover, and the cooling water continuously runs in an internal circulation mode;

step five: the computer control system controls the air supply system to supply air;

step six: reducing gas is filled in the gas cylinder, the gas flows out of the gas cylinder and enters a flow meter, the opening degree of the flow meter is controlled by a computer control system, an outlet of the flow meter is connected with a gas mixing device, porous media or steel wire scraps are arranged in the gas mixing device, and the gas is mixed by the gas mixing device and then is output to a hearth of the test furnace through a gas heating device and reaches a sample position;

step seven: the camera automatically adjusts the focal length according to the temperature and the light condition of the hearth of the test furnace so as to obtain a clear image, and the acquired image is transmitted to the computer control system;

step eight: the computer control system automatically processes the acquired image, including rejecting the miscellaneous image, calculating the area of the sample and drawing the area shrinkage rate of the sample;

step nine: and after the test is finished, the computer control system respectively controls the furnace body heating element to stop heating and the gas supply system to stop supplying gas.

Further, the hearth temperature measuring thermocouple detects the real-time temperature of the hearth of the test furnace and feeds back the real-time temperature to the computer control system, and the sample temperature measuring thermocouple detects the real-time temperature of a sample and feeds back the real-time temperature to the computer control system.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

the invention controls the flow by driving the gas supply system by the computer control system, ensures that the reducing gas can be uniformly mixed by the gas mixing device, ensures that the temperature of the gas is qualified when the gas reaches the position of a sample by the gas heating device, acquires an image by the camera capable of automatically focusing and directly transmits the image to the computer control system to realize the real-time acquisition of the reflow process, can automatically process the image by the computer control system, eliminates the miscellaneous images, calculates the area of the sample, generates an area shrinkage rate curve and the like, can determine the reflow temperature index of the iron ore according to the obtained test area shrinkage rate, and has higher automation integration level if the temperature when the area shrinkage rate is 10 percent is the softening temperature of the iron ore.

Drawings

Fig. 1 is an overall structural view of the present invention.

In the figure: 1. a horizontal furnace body; 2. a test furnace hearth; 3. an air supply system; 31. a gas cylinder; 32. a flow meter; 33. a gas mixing device; 34. a gas heating device; 4. a sample temperature thermocouple; 5. a tail gas outlet; 6. a furnace body cooling water inlet; 7. a furnace body cooling water outlet; 8. sealing a cooling water inlet of the furnace cover; 9. sealing a cooling water outlet of the furnace cover; 10. a temperature thermocouple for measuring the temperature of the hearth; 11. a sample; 12. reducing gas flow equalizing plate; 13. a furnace body heating element; 14. an image acquisition port; 15. a camera; 16. a computer control system.

Detailed Description

The invention is further described with reference to the following figures and examples: