A split iron ore soft melting dripping performance detection device and detection method

Abstract

The present invention relates to a split-type iron ore soft melting dripping performance detection device, comprising a furnace frame mechanism, a load mechanism, a split-type furnace body, a pressure head mechanism, a drip receiving mechanism and a control cabinet. The load mechanism applies pressure to the pressure head mechanism from the top, the pressure head mechanism extends into the split-type furnace body from the top, and the drip receiving mechanism extends into the split-type furnace body from the bottom. After the split-type furnace body is closed, a sealed furnace cavity is formed inside. The load mechanism, the split-type furnace body and the drip receiving mechanism are connected to the furnace frame mechanism. The present invention adopts a split-type furnace body layout, which is convenient for sample loading and installation and detection. While ensuring the good airtightness of the system, it is easier to install, disassemble and load, and the assembly process is simple and reliable. By adopting an electric push rod to add load, the load pressure head can be vertically lifted and lowered under the drive of the pressure head lifting mechanism, so as to realize the loading and unloading of the iron ore sample in the sample crucible, which is safe and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace smelting, and in particular to a split-type iron ore soft melting dripping performance detection device. Background Art

[0002] The blast furnace is a black box reactor. It is impossible to directly observe the reactions and real-time conditions in it. It can only be inferred through sampling or simulation experiments in the furnace. In the blast furnace production process, according to the blast furnace column structure and the state of the charge, the entire column can be divided into a block zone, a soft melting zone and a dripping zone. The position, thickness and shape of the soft melting zone determine the gas distribution in the blast furnace, thereby affecting the blast furnace smelting process. Therefore, good metallurgical properties of iron-containing charge are an important guarantee for achieving smooth and high production of the blast furnace.

[0003] The iron ore high temperature load reduction soft melting dripping tester is used to measure the softening temperature and temperature range of the ore, the starting temperature and ending temperature of dripping, the permeability of the soft melting zone, the properties of the molten dripping material, etc. It has a certain guiding significance for determining the reasonable charge structure of the blast furnace. Most of the existing iron ore high temperature load reduction soft melting dripping performance test devices complete the sample loading and unloading work by heating the furnace body lifting and lowering or remove the load pressure head to load the sample from the top. The heating furnace body is an overall closed structure, and the load pressure head is set in the heating furnace body. The alignment process of the load pressure head with the sample crucible as the heating furnace body descends is a non-visual process. There is often a phenomenon of alignment deviation and jamming between the two, and even damage to the device, which brings a lot of trouble to the daily operation of the experimenter. There are two main types of load-loading mechanisms in the prior art. One is hydraulic, which is more complicated and requires a hydraulic station. When oil leaks, the test environment is greatly deteriorated. The other is weight-type, which is also the most commonly used form. This form is simpler, but during the test, the weights may fall, which seriously threatens the safety of the test personnel. Moreover, each time the test is conducted, the friction force of the weights when they slide down is different due to different sample changes, making it difficult to accurately load the weight, thus affecting the test results. In addition, the heating element of the test furnace in the prior art has the problem that the heating rate in the high-temperature stage is not high enough. The existing high-temperature iron ore dripping furnace currently has the following main problems in the design and actual testing process:

[0004] 1. It can only measure the furnace temperature, but cannot directly measure the material temperature. It is inaccurate to use the furnace temperature as the soft melting temperature and dripping temperature of iron ore. The temperature measurement of some materials is also inaccurate.

[0005] 2. Due to technical limitations, it is impossible to achieve automatic temperature control of the entire process of the drip furnace from the cold state to the molten state of iron ore.

[0006] 3. The determination of the droplet time point is not accurate enough, and manual observation is often used.

[0007] 4. Due to the presence of load weights, the disassembly and assembly of the load weights is cumbersome, the load pressure head is often misaligned, and sample loading is difficult.

[0008] However, the determination method of iron ore droplet performance in my country has not been standardized, and most research institutes and production units design corresponding test devices according to their own needs. In the Chinese invention patent specification CN201110132000.3, the invention discloses a droplet furnace for determining the droplet point of iron ore, including a furnace body and a control device, wherein a closed furnace is formed in the middle of the furnace body, and a heating device is arranged outside the furnace, characterized in that: a graphite crucible is arranged in the furnace, and the heating device heats the furnace, the graphite crucible and the ore sample in the graphite crucible under a controlled state; a hollow graphite pressure rod is arranged on the upper part of the furnace body, and a thermocouple is arranged in the hollow graphite pressure rod, and the lower end of the thermocouple passes through the graphite plate in the graphite crucible to contact the ore sample; a closed sampling box is arranged under the furnace body; a receiving crucible for receiving the molten metal liquid is arranged in the sampling box directly below the graphite crucible. The dripping furnace of the present invention can accurately measure the temperature of the material, and use the temperature of the material as the soft melting temperature and dripping temperature of the iron ore, which greatly improves the accuracy of the dripping temperature, improves the accuracy of the determination of the dripping time point, and accurately captures the temperature and pressure curves at the dripping moment.

[0009] A test device and method for simulating the state of iron ore under blast furnace ironmaking conditions is disclosed in the Chinese invention patent specification CN202010365066.6, which belongs to the technical field of ironmaking raw material performance detection. The device includes a molten drop test electric furnace, an automatic control device, a gas purification and analysis device, and an automatic collection device. The heating area of ​​the molten drop furnace is a sealed corundum tube, an upper sealing flange, and a gas port connected to a gas test system. The load is applied to a hollow high-purity graphite crucible. There is a platinum-rhodium sample temperature measurement thermocouple inside the high-purity graphite pressure rod. The upper end of the pressure rod is protected by a stainless steel cap. The lower part drips with a weight sensor, and the drip collection chamber has an observation window and a pressure sensor. The present invention can accurately determine the reducibility of the material at each point during the softening, shrinking, and melting dripping process. It is a method for comprehensively judging the reduction, softening, and dripping behavior of iron-containing furnace charge in a blast furnace. The load reduction test provides more theoretical basis for judging the structure of blast furnace charge. Summary of the invention

[0010] The technical problem to be solved by the present invention is to provide a split-type iron ore soft melting dripping performance detection device to detect the reduction degree and soft melting dripping characteristics of iron-containing minerals, which is used to reasonably evaluate the charge structure and predict the reduction behavior of the charge in the blast furnace.

[0011] To achieve the above object, the present invention adopts the following technical solutions:

[0012] A split-type iron ore soft melting dripping performance detection device comprises a furnace frame mechanism, a load mechanism, a split-type furnace body, a pressure head mechanism, a drip receiving mechanism and a control cabinet, wherein the load mechanism applies pressure to the pressure head mechanism from the top, the pressure head mechanism extends into the split-type furnace body from the top, the drip receiving mechanism extends into the split-type furnace body from the bottom, and a sealed furnace cavity is formed inside the split-type furnace body after it is closed, the load mechanism, the split-type furnace body and the drip receiving mechanism are connected to the furnace frame mechanism, the split-type furnace body comprises a furnace body and a heat dissipation furnace cap which can be opened and closed on both sides, and the two furnace bodies rotate with two furnace body rotating shafts respectively The furnace body is connected, the furnace shaft is fixedly connected to the furnace frame mechanism, a heating element is arranged in the furnace body, the upper end of which extends into the heat dissipation furnace cap, and the side wall of the heat dissipation furnace cap is provided with a terminal for the heating element. The load mechanism includes a push rod seat, an electric push rod, a displacement sensor, a load support plate frame, and a load block. The push rod seat is fixed to the furnace frame mechanism, the top of the push rod seat is connected to the electric push rod, the electric push rod is provided with a displacement sensor, the moving end of the electric push rod is connected to the load support plate frame, the load support plate frame is slidably connected to the furnace frame mechanism, the load support plate frame is provided with a load block, and one end of the load support plate frame is connected to the pressure head mechanism.

[0013] The heating element is a thermocouple.

[0014] The furnace frame mechanism includes a base, a support frame, a column, and a furnace body slat. The support frame and the column are fixedly connected to the base, the support frame is fixedly connected to the load mechanism and the drip mechanism, the column is slidably connected to the load support frame, the furnace body slat is fixedly connected to the column, and the furnace body slat is fixedly connected to the furnace body rotating shaft.

[0015] The pressure head mechanism includes a load pressure rod nut, a load pressure rod socket, a load pressure rod, an anti-radiation ring, and a load pressure head which are connected in sequence. A temperature measuring thermocouple is arranged inside the load pressure rod nut, the load pressure rod socket, the load pressure rod, the anti-radiation ring, and the load pressure head.

[0016] The drip-bearing mechanism comprises a crucible base, which is connected to a support frame of a furnace frame mechanism, a water-cooling ring is arranged on the periphery of the crucible base, the upper part of the crucible base is disassembled and connected to the crucible support, the upper part of the crucible support is disassembled and connected to the sample crucible, a corundum protective tube is sleeved on the outside of the crucible support and the sample crucible, the corundum protective tube is flush with the upper edge of the sample crucible, a drip hole is arranged at the bottom of the sample crucible, a peephole quartz tube is connected to the bottom of the crucible base, the bottom of the peephole quartz tube is connected to the quartz tube base, the quartz tube base is connected to the cylinder support plate through a lifting slide rod, the cylinder is connected to the cylinder support plate, the movable end of the cylinder is connected to the crucible lifting cylinder seat, and the crucible lifting cylinder seat can be moved on the lifting slide rod Sliding, a crucible insulation seat is arranged inside the crucible lifting cylinder seat, a molten crucible is arranged on the top of the crucible insulation seat, a button weighing sensor is arranged at the bottom of the crucible insulation seat, and the button weighing sensor is used to measure the weight of the molten iron after the iron ore falls into the molten crucible. The bottom of the crucible lifting cylinder seat is connected to the gas sleeve, and the gas sleeve is connected to the inside of the crucible lifting cylinder seat through air holes, and air inlet one and air inlet two are respectively arranged at both ends of the gas sleeve. The crucible lifting cylinder seat can be pushed by the cylinder to seal and contact with the quartz tube base, and the corundum protective tube, crucible base, peephole quartz tube and the inside of the molten crucible are connected to each other. The sample crucible, crucible support and molten crucible are all made of graphite.

[0017] The gas inlet 1 is used to introduce gas, including CO gas and N2 gas introduced separately or in combination, and the gas inlet 2 is connected to a pressure difference sensor.

[0018] The method for detecting the iron ore soft melting dripping performance by using a split iron ore soft melting dripping performance detection device comprises:

[0019] a. Iron ore and coke are made into samples with a particle size of 10-12.5 mm;

[0020] b. Open the split furnace, put the sample into the sample crucible, start the electric push rod to drive the pressure head mechanism downward, so that the load pressure head is pressed tightly on the sample in the sample crucible; the temperature measuring thermocouple is in contact with the sample;

[0021] c. Close the split furnace, energize the heating element to heat the iron ore sample to 1600℃; the temperature rises at 10-15℃ / min, and at 500℃, the temperature is kept constant for 50-60 minutes and then continues to rise, and N2 protective gas is introduced at a flow rate of 5-8L / min; when the temperature reaches 600℃, CO and N2 reducing gas are introduced at a flow rate of 15-20L / min, and from 900℃ to 1100℃, the temperature rises at 2.5-3.0℃ / min; when it is greater than 1100℃, the temperature rises at 5-10℃ / min; after the experiment, N2 protective gas is introduced until the sample cools down;

[0022] d. The test results of iron ore soft melting dripping are measured by software: weight loss of charge m (g), shrinkage s (%), softening start temperature T10％ (℃), softening end temperature T 40％ (℃), melting start temperature T m (℃), maximum pressure difference ΔP max (kPa), maximum pressure difference corresponding to temperature T ΔPmax (℃), melting end temperature T f (℃).

[0023] The reducing gas simulates blast furnace gas at a volume ratio of CO:N2=30:70.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. While detecting the soft melting dripping parameters of iron ore, it can also realize the overall detection of the charge from low temperature, medium temperature to high temperature. It has many detection indicators and can more intuitively characterize the high temperature behavior of the charge.

[0026] 2. The device adopts a split furnace layout, which is convenient for sample loading and installation and testing. While ensuring the good airtightness of the system, it is easier to install, disassemble and load, and the assembly process is simple and reliable.

[0027] 3. The sample crucible, molten drop crucible and crucible support are all made of graphite. A corundum tube is used to protect the sample crucible and crucible support to prevent the graphite parts from burning and oxidation.

[0028] 4. This detection method uses an electric push rod to add load. The load pressure head can be vertically lifted and lowered under the drive of the pressure head lifting mechanism to realize the loading and unloading of the iron ore sample in the sample crucible, which is safe and reliable.

[0029] 5. The dripping mechanism is an integral structure, which is easy to disassemble. A quartz tube is used as the observation window, which is clear and understandable. A button weighing sensor is used to sense the slag iron dripping process, which is convenient and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention.

[0031] Figure 2 It is a partial top view of the present invention.

[0032] Figure 3 It is a structural schematic diagram of the pressure head mechanism.

[0033] Figure 4 It is a structural schematic diagram of the drip mechanism.

[0034] In the figure: furnace frame mechanism 1, load mechanism 2, split furnace body 3, pressure head mechanism 4, drip mechanism 5, base 6, furnace body shaft 7, column 8, furnace body slat 9, electric push rod 10, displacement sensor 11, load support plate frame 12, load block 13, support frame 14, air inlet 1 15, push rod seat 16, air inlet 2 17, drop hole 18, corundum protective tube 19, crucible support 20, furnace body 21, heating element 22, sample crucible 23, heat dissipation furnace cap 24 , terminal 25, temperature measuring thermocouple 26, load pressure rod nut 27, load pressure rod connector 28, load pressure rod 29, radiation protection ring 30, load pressure head 31, crucible base 32, water cooling ring 33, peephole quartz tube 34, quartz tube base 35, gas sleeve 36, air vent 37, cylinder support plate 38, cylinder 39, button weighing sensor 40, differential pressure sensor 41, crucible insulation seat 42, lifting slide rod 43, crucible lifting tube seat 44, molten drop crucible 45. DETAILED DESCRIPTION

[0035] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0036] like Figure 1-Figure 4 A split iron ore soft melting dripping performance detection device includes a furnace frame mechanism 1, a load mechanism 2, a split furnace body 3, a pressure head mechanism 4, a drip mechanism 5 and a control cabinet. The load mechanism 2 applies pressure to the pressure head mechanism 4 from the top, the pressure head mechanism 4 extends into the split furnace body 3 from the top, and the drip mechanism 5 extends into the split furnace body 3 from the bottom. After the split furnace body 3 is closed, a sealed furnace cavity is formed inside. The load mechanism 2, the split furnace body 3, and the drip mechanism 5 are connected to the furnace frame mechanism 1. The split furnace body 3 includes a furnace body 21 and a heat dissipation furnace cap 24 that can be opened and closed on both sides. The two furnace bodies 21 are rotatably connected to two furnace body rotating shafts 7 respectively, and the furnace body rotating shaft 7 is fixedly connected to the furnace frame mechanism. The two furnace bodies 21 are closed and locked by a lock. A heating element 22 is arranged in the furnace body 21, and the heating element 22 is a thermocouple. Its upper end extends into the heat dissipation furnace cap 24, and a terminal 25 of the heating element is arranged on the side wall of the heat dissipation furnace cap 24.

[0037] The load mechanism 2 includes a push rod seat 16, an electric push rod 10, a displacement sensor 11, a load support plate frame 12, and a load block 13. The push rod seat 16 is fixed to the furnace frame mechanism, the top of the push rod seat is connected to the electric push rod 10, the electric push rod 10 is provided with a displacement sensor 11, the moving end of the electric push rod 10 is connected to the load support plate frame 12, the load support plate frame 12 is slidably connected to the furnace frame mechanism, the load support plate frame 12 is provided with a load block 13, and one end of the load support plate frame 12 is connected to the pressure head mechanism.

[0038] The furnace frame mechanism 1 includes a base 6, a support frame 14, a column 8, and a furnace body slat 9. The support frame 14 and the column 8 are fixedly connected to the base 6. The support frame 14 is fixedly connected to the load mechanism and the drip mechanism. The column 8 is slidably connected to the load support plate frame 12. The furnace body slat 9 is fixedly connected to the column 8, and the furnace body slat 9 is fixedly connected to the furnace body rotating shaft 7.

[0039] The pressure head mechanism 4 includes a load pressure rod nut 27, a load pressure rod socket 28, a load pressure rod 29, an anti-radiation ring 30, and a load pressure head 31 which are connected in sequence. A temperature measuring thermocouple 26 is arranged inside the load pressure rod nut 27, the load pressure rod socket 28, the load pressure rod 29, the anti-radiation ring 30 and the load pressure head 31.

[0040] The drip receiving mechanism 5 includes a crucible base 32, which is connected to the support frame 14 of the furnace frame mechanism. A water cooling ring 33 is provided on the periphery of the crucible base 32. The upper part of the crucible base 32 is disassembled and connected to the crucible support 20. The upper part of the crucible support 20 is disassembled and connected to the sample crucible 23. The outer parts of the crucible support 20 and the sample crucible 23 are sleeved with a corundum protective tube 19. The corundum protective tube 19 is flush with the upper edge of the sample crucible 23. A drip hole 18 is provided at the bottom of the sample crucible 23. A peephole quartz tube 34 is connected to the lower part of the crucible base 32. The lower part of the peephole quartz tube 34 is connected to a quartz tube base 35. The quartz tube base 35 is connected to a cylinder support plate 38 through a lifting slide rod 43. The cylinder support plate 38 is connected to a cylinder 39. The movable end of the cylinder 39 is connected to a crucible lifting cylinder seat 44. The lifting cylinder seat 44 can slide on the lifting slide bar 43. The crucible lifting cylinder seat 44 is provided with a crucible insulation seat 42 inside. The top of the crucible insulation seat 42 is provided with a molten crucible 45. The bottom of the crucible insulation seat 42 is provided with a button weighing sensor 40. The button weighing sensor 40 is used to measure the weight of the molten iron liquid after the iron ore falls into the molten crucible 45. The bottom of the crucible lifting cylinder seat 44 is connected to the gas sleeve 36. The gas sleeve 36 is connected to the inside of the crucible lifting cylinder seat 44 through the air vent 37. The two ends of the gas sleeve 36 are respectively provided with a gas inlet 15 and a gas inlet 2 17. The crucible lifting cylinder seat 44 can be pushed by the cylinder 39 to seal and contact with the quartz tube base 35. The corundum protective tube 19, the crucible base 32, the peephole quartz tube 34 and the inside of the molten crucible 45 are connected to each other. The sample crucible 23, the molten crucible 45, and the crucible support 20 are all made of graphite. The corundum tube 19 is used to protect the sample crucible 23 and the crucible support 20 to prevent the graphite parts from burning and oxidation.

[0041] The gas inlet 15 is connected to the gas, including CO gas and N2 gas, which are introduced separately or mixed, and the gas inlet 2 17 is connected to the pressure difference sensor 41.

[0042] The method for detecting the iron ore soft melting dripping performance by using a split iron ore soft melting dripping performance detection device comprises:

[0043] a. Iron ore and coke are made into samples with a particle size of 10-12.5 mm;

[0044] b. Open the split furnace, place the sample into the sample crucible 23, start the electric push rod 10 to drive the pressure head mechanism downward, so that the load pressure head 31 is pressed tightly on the sample in the sample crucible 23, the load pressure head pressure is 0.3MPa, and the temperature measuring thermocouple 26 is in contact with the sample;

[0045] c. Close the split furnace, energize the heating element to heat the iron sample to 1600℃; the temperature rises at 10℃ / min, keeps constant at 500℃ for 50 minutes and then continues to rise, and introduces N2 protective gas at a flow rate of 5L / min; when the temperature reaches 600℃, introduce CO and N2 reducing gas, CO:N2=30:70 to simulate blast furnace gas, with a flow rate of 15L / min, from 900℃ to 1100℃, the temperature rises at 2.5℃ / min; when it is greater than 1100℃, the temperature rises at 5℃ / min; after the experiment, introduce N2 protective gas until the sample cools down; the experimental conditions are as follows Figure 1 ;

[0046] d. The test results of iron ore soft melting dripping are measured by software: weight loss of charge m (g), shrinkage s (%), softening start temperature T 10％ (℃), softening end temperature T 40％ (℃), melting start temperature T m (℃), maximum pressure difference ΔP max (kPa), maximum pressure difference corresponding to temperature T ΔPmax (℃), melting end temperature T f (℃).

[0047] The results are shown in the table below;

[0048] Iron ore soft melting dripping test results

[0049]

[0050]

[0051] The present invention is convenient for sample loading, installation and testing. While ensuring the good airtightness of the system, it is easier to install, disassemble and load, and the assembly process is simple and reliable. The detection method uses an electric push rod to add load, and the load pressure head can be vertically lifted and lowered under the drive of the pressure head lifting mechanism to achieve the loading of the iron ore sample in the sample crucible, which is safe and reliable; the drip mechanism is an integral structure, which is easy to disassemble and has good sealing. A quartz tube is used as an observation window, which is clear and concise. A button weighing sensor is used to sense the slag iron dripping process, which is convenient and reliable. The operation process of the entire device is simplified, and the test accuracy is improved.

[0052] The present invention can help iron-making workers to accurately grasp the structure, position and thickness of the blast furnace soft melting zone in actual blast furnace iron-making production; and then grasp the important parameters affecting the distribution of the block-shaped belt coal gas flow in the upper part of the blast furnace, the indirect reduction of the comprehensive charge of the blast furnace, and the smooth operation of the blast furnace. Therefore, the implementation of the technical solution of the present invention can ensure that the blast furnace achieves the production goals of high yield, high quality and low consumption.

[0053] The above description is only the basic principle of the present invention and does not impose any limitation on the present invention. Any equivalent changes and modifications made thereto according to the present invention are within the scope of the protection scheme of this patent technology.

Claims

1. A split iron ore soft melting dripping performance detection device, characterized in that: The invention comprises a furnace frame mechanism, a load mechanism, a split furnace body, a pressure head mechanism, a drip mechanism and a control cabinet. The load mechanism applies pressure to the pressure head mechanism from the top. The pressure head mechanism extends into the split furnace body from the top. The drip mechanism extends into the split furnace body from the bottom. After the split furnace body is closed, a sealed furnace cavity is formed inside. The load mechanism, the split furnace body and the drip mechanism are connected to the furnace frame mechanism. The split furnace body comprises a furnace body and a heat dissipation furnace cap which can be opened and closed on both sides. The two furnace bodies are rotatably connected to the two furnace body rotating shafts respectively. The furnace body rotating shaft is connected to the furnace frame. The mechanism is fixedly connected, a heating element is arranged in the furnace body, the upper end of which extends into the heat dissipation furnace cap, and a terminal of the heating element is arranged on the side wall of the heat dissipation furnace cap. The load mechanism includes a push rod seat, an electric push rod, a displacement sensor, a load support plate frame, and a load block. The push rod seat is fixed to the furnace frame mechanism, the top of the push rod seat is connected to the electric push rod, the electric push rod is provided with a displacement sensor, the moving end of the electric push rod is connected to the load support plate frame, the load support plate frame is slidably connected to the furnace frame mechanism, the load support plate frame is provided with a load block, and one end of the load support plate frame is connected to the pressure head mechanism; The pressure head mechanism comprises a load pressure rod nut, a load pressure rod socket, a load pressure rod, an anti-radiation ring, and a load pressure head which are connected in sequence, and a temperature measuring thermocouple is arranged inside the load pressure rod nut, the load pressure rod socket, the load pressure rod, the anti-radiation ring, and the load pressure head; The drip-bearing mechanism comprises a crucible base, which is connected to a support frame of a furnace frame mechanism, a water-cooling ring is arranged on the periphery of the crucible base, the upper part of the crucible base is disassembled and connected to the crucible support, the upper part of the crucible support is disassembled and connected to the sample crucible, a corundum protective tube is sleeved on the outside of the crucible support and the sample crucible, the corundum protective tube is flush with the upper edge of the sample crucible, a drip hole is arranged at the bottom of the sample crucible, a peephole quartz tube is connected to the bottom of the crucible base, the bottom of the peephole quartz tube is connected to the quartz tube base, the quartz tube base is connected to the cylinder support plate through a lifting slide rod, the cylinder is connected to the cylinder support plate, the movable end of the cylinder is connected to the crucible lifting cylinder seat, and the crucible lifting cylinder seat can be moved on the lifting slide rod Sliding, a crucible insulation seat is arranged inside the crucible lifting cylinder seat, a molten crucible is arranged on the top of the crucible insulation seat, a button weighing sensor is arranged at the bottom of the crucible insulation seat, and the button weighing sensor is used to measure the weight of the molten iron after the iron ore falls into the molten crucible. The bottom of the crucible lifting cylinder seat is connected to the gas sleeve, and the gas sleeve is connected to the inside of the crucible lifting cylinder seat through air holes, and air inlet one and air inlet two are respectively arranged at both ends of the gas sleeve. The crucible lifting cylinder seat can be pushed by the cylinder to seal and contact with the quartz tube base, and the corundum protective tube, crucible base, peephole quartz tube and the inside of the molten crucible are connected to each other. The sample crucible, crucible support and molten crucible are all made of graphite.

2. A split iron ore soft melting dripping performance detection device according to claim 1, characterized in that: The heating element is a thermocouple.

3. The split iron ore soft melting dripping performance detection device according to claim 1 is characterized in that: The furnace frame mechanism includes a base, a support frame, a column, and a furnace body slat. The support frame and the column are fixedly connected to the base, the support frame is fixedly connected to the load mechanism and the drip mechanism, the column is slidably connected to the load support frame, the furnace body slat is fixedly connected to the column, and the furnace body slat is fixedly connected to the furnace body rotating shaft.

4. The split iron ore soft melting dripping performance detection device according to claim 1 is characterized in that: The gas inlet 1 is used to introduce gas, including CO gas and N2 gas introduced separately or in combination, and the gas inlet 2 is connected to a pressure difference sensor.

5. A method for detecting the dripping performance of iron ore by using the split iron ore soft melting dripping performance detection device as claimed in claim 1, characterized in that: include: a. Iron ore and coke are made into samples with a particle size of 10-12.5 mm; b. Open the split furnace, put the sample into the sample crucible, start the electric push rod to drive the pressure head mechanism downward, so that the load pressure head is pressed tightly on the sample in the sample crucible; the temperature measuring thermocouple is in contact with the sample; c. Close the split furnace, energize the heating element to heat the iron ore sample to 1600℃; the temperature rises at 10-15℃ / min, and at 500℃, the temperature is kept constant for 50-60 minutes and then continues to rise, and N2 protective gas is introduced at a flow rate of 5-8L / min; when the temperature reaches 600℃, CO and N2 reducing gas are introduced at a flow rate of 15-20L / min, and the temperature rises at 2.5-3.0℃ / min from 900℃ to 1100℃; when it is greater than 1100℃, the temperature rises at 5-10℃ / min; after the experiment, N2 protective gas is introduced until the sample cools down; d. The test results of iron ore soft melting dripping are measured by software: weight loss m, shrinkage s, softening start temperature T of the charge 10% , softening end temperature T 40% , Melting start temperature T m , Maximum pressure difference ΔP max , Maximum pressure difference corresponds to temperature T ΔPmax , melting end temperature T f .

6. The method according to claim 5, characterized in that The reducing gas simulates blast furnace gas at a volume ratio of CO:N2=30:70.

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