CN112611650A - Coke high-temperature compressive strength measuring device and analysis method - Google Patents
Coke high-temperature compressive strength measuring device and analysis method Download PDFInfo
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
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- G01N2203/0019—Compressive
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
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Abstract
The invention relates to a coke high-temperature compressive strength measuring device, which comprises a furnace body, a linear driving mechanism, a lifting mechanism, a force measuring sensor and a pressure lever, wherein the furnace body is arranged on the linear driving mechanism, the pressure lever is arranged above the furnace body, and the upper end of the pressure lever is connected with the lifting mechanism through the force measuring sensor. The furnace body is mechanically stepped, and a mode that a pressure rod moves horizontally is not adopted, so that a plurality of samples are conveniently measured; the coke sample can be continuously measured in a closed state, and the test requirements are met; the repeatability and reproducibility of the coke test can be improved, and the accuracy of data is ensured.
Description
Technical Field
The invention relates to the field of blast furnace ironmaking, in particular to a device and an analysis method for determining high-temperature compressive strength of coke.
Background
The coke is an important raw material for blast furnace ironmaking, and plays roles of a heating agent, a reducing agent, a carburizing agent and a framework in the blast furnace. The coke is subjected to high temperature thermal stress, slag iron erosion, gas erosion, mechanical stress in the blast furnace, resulting in deterioration of the coke in the blast furnace. The traditional coke thermal strength indexes CRI and CSR are that coke reacts with CO gas at high temperature to measure the weight loss rate and the drum strength of the coke, and the limitation is that the mechanical strength of the coke can not be measured on line at high temperature.
In recent years, research on the high-temperature compressive strength of coke is started at home, and the compressive performance of the coke under the high-temperature and blast-furnace atmosphere is simulated, but the high-temperature compressive strength measuring equipment developed at home and abroad at present has the problems of poor air tightness and the like, so that further equipment development is needed, and an analysis method is improved to better guide the production of a blast furnace and the coal blending for coking.
The problems that exist are that:
1. the coke high-temperature compressive strength measuring equipment developed at present at home and abroad has poor air tightness and cannot continuously measure a sample at high temperature in a fully closed state of a furnace body on line;
2. the coke sample adopts a cylindrical shape and the like, which can cause measurement errors;
3. the analysis method of the high-temperature compressive strength of the coke is not systematic enough and has weak guiding effect on production.
Disclosure of Invention
The invention aims to provide a device and an analysis method for determining the high-temperature compressive strength of coke, so as to overcome the defects in the prior art.
The technical scheme for solving the technical problems is as follows: the coke high-temperature compressive strength measuring device comprises a furnace body, a linear driving mechanism, a lifting mechanism, a force measuring sensor and a pressure rod, wherein the furnace body is arranged on the linear driving mechanism, the pressure rod is arranged above the furnace body, and the upper end of the pressure rod is connected with the lifting mechanism through the force measuring sensor.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the top of the furnace body is provided with a water tank, the upper end of the water tank is open, the bottom of the water tank is provided with an opening, an annular surrounding frame is arranged in the water tank and surrounds the opening, the annular surrounding frame is connected with the bottom of the water tank in a seamless mode, the upper end of the annular surrounding frame is higher than a liquid level line of water contained in the water tank, a sealing cover is fixedly arranged on the pressure rod, the annular surrounding frame is covered by the sealing cover, and the lower end of the sealing cover is located below the liquid level line of the water contained in the water tank; the lower end of the pressure lever extends into the furnace body through the annular surrounding frame.
Further, a water inlet and a water outlet are arranged on the water tank, and the water inlet and the water outlet are respectively connected with a water inlet pipe and a water outlet pipe.
Furthermore, a plurality of ball sockets are arranged on the crucible in the furnace body along the moving direction of the crucible, and the ball sockets are positioned in the area surrounded by the annular surrounding frame.
Furthermore, a silicon-molybdenum rod is arranged in the furnace body.
Further, the furnace body is provided with a transparent hole; still include the high temperature camera, the high temperature camera sees through the test sample that transparent hole placed in the collection furnace body.
Further, the linear driving mechanism is a screw rod linear sliding table.
The intelligent printer further comprises a control box, wherein an intelligent control system and a micro printer electrically connected with the intelligent control system are arranged in the control box; the linear driving mechanism, the lifting mechanism, the force measuring sensor and the high-temperature camera are respectively and electrically connected with an intelligent control system in the control box.
An analytical method for determining the compressive strength of coke by using a coke high-temperature compressive strength determination device comprises the following steps:
making coke into a spherical shape with the granularity of 22-25 mm, and placing the spherical shape in a ball socket;
heating the silicon-molybdenum rod to heat the furnace body, and introducing protective gas N at the flow rate of 1.0-3L/min2Heating to about 400 deg.C, introducing CO2Or H2Heating to 1100-1400 ℃, keeping constant for 1-2 h, adjusting the position of the furnace body through a linear driving mechanism to enable a coke sample to be detected to be positioned under a pressure lever, controlling the pressure lever to move downwards at the speed of 50-200 mm/min through an intelligent control system, observing the distance between the pressure lever and coke through a high-temperature camera, reducing the speed of the pressure lever to 20-50 mm/min when the pressure lever approaches the coke, gradually increasing the pressure when the pressure lever begins to extrude the coke, judging that the coke is broken by reducing the pressure from the peak value by 5-15%, stopping pressing the pressure lever, wherein the peak value is the compressive strength Q of the coke, lifting the pressure lever, and starting to perform next cokeMeasuring the compressive strength of the carbon, and closing CO after all measurements are finished2And H2Introduction of N2Gas, power off until the coke cools to room temperature, and N is cut off2A gas;
the coke crushed in the test process is placed in N2Taking out the mixture after natural cooling under protection, and weighing the weight W1Beating with a rotary drum, performing particle size analysis on the coke beaten by the rotary drum with a round hole sieve, and recording the weight of the oversize material W2Calculating R ═ W2/W1Analyzing the relation between the rotary drum strength R and the compressive strength Q, and ensuring that the R and Q values are simultaneously stabilized in a reasonable range;
measuring the volume ratio V of fine particle mosaic structure to isotropic structure in coke optical structure1And V2Will be structural ratio V1And V2Performing regression analysis with the high-temperature compressive strength Q of the coke to guide coal blending for coking when V is1And V2When the coal blending structure is normal, the Q value is low, and the Q value is improved by adjusting the coal blending structure;
researching the relation between Tz and the coke compressive strength Q, taking the tuyere coke, and analyzing the tuyere coke granularity, the high-temperature thermal performance index and the coke high-temperature compressive strength Q.
The invention has the beneficial effects that:
the furnace body is mechanically stepped, and a mode that a pressure rod moves horizontally is not adopted, so that a plurality of samples are conveniently measured;
the coke sample can be continuously measured in a closed state, and the test requirements are met;
the repeatability and reproducibility of the coke test can be improved, and the accuracy of data is ensured;
by adjusting the reducing atmosphere, the reaction time and the alkali metal of the coke K, Na (the alkali metal content of the coke can be increased by soaking the coke in potassium carbonate and sodium carbonate solution), part of blast furnace conditions are simulated, the high-temperature thermal strength of the coke is measured on line, and a new evaluation method is provided for the performance evaluation of the blast furnace coke;
the high-temperature compressive strength index of the coke suitable for blast furnace smelting can be found out by researching the relationship between the air permeability index, the tuyere coke performance and the like of the blast furnace and the high-temperature thermal strength of the coke and researching the granularity, the optical organization structure and the like of the coke after a compressive test, and the high-temperature compressive strength index of the coke suitable for blast furnace smelting can be used for guiding the production and coal blending coking of the blast furnace.
Drawings
FIG. 1 is a schematic view showing the construction of an apparatus for measuring the high-temperature compressive strength of coke according to the present invention;
FIG. 2 is a view of the internal structure of the furnace body of the present invention;
FIG. 3 is an example of the high temperature compressive strength of coke.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises a furnace body, 110, a water tank, 120, a water inlet pipe, 130, a water outlet pipe, 140, a ball socket, 150, a silicon-molybdenum rod, 160, a charging hole, 170, an annular surrounding frame, 2, a linear driving mechanism, 3, a lifting mechanism, 4, a pressure rod, 410, a sealing cover, 5, a high-temperature camera, 6 and a control box.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1-2, a coke high-temperature compressive strength measuring device comprises a furnace body 1, a linear driving mechanism 2, a lifting mechanism 3, a force measuring sensor and a pressure lever 4, wherein the furnace body 1 is arranged on the linear driving mechanism 2, the furnace body 1 can be driven to move linearly through the linear driving mechanism 2 so as to adjust the position of coke placed in the furnace body 1 relative to the pressure lever 4, so that the coke can move to the position right below the pressure lever 4, the pressure lever 4 is arranged above the furnace body 1, the upper end of the pressure lever 4 is connected with the lifting mechanism 3 through the force measuring sensor, the lower end of the pressure lever 4 extends into the furnace body 1, and the pressure lever 4 is driven to move up and down through the lifting mechanism 3; the furnace body 1 is provided with a charging hole 160.
Example 2
As shown in fig. 1 to fig. 2, this embodiment is a further improvement on embodiment 1, and specifically includes the following steps:
the top of the furnace body 1 is provided with a water tank 110, the upper end of the water tank 110 is open, the bottom of the water tank 110 is provided with an opening, an annular surrounding frame 170 is arranged in the water tank 110 around the opening, the annular surrounding frame 170 is connected with the bottom of the water tank 110 in a seamless mode, the upper end of the annular surrounding frame 170 is higher than the liquid level line of water contained in the water tank 110, a sealing cover 410 is fixedly arranged on the pressure rod 4, the sealing cover 410 is hollow and has an open lower end, the sealing cover 410 covers the annular surrounding frame 170, the lower end of the sealing cover 410 is located below the liquid level line of the water contained in the water tank 110, and the annular surrounding frame 170 always moves in the sealing cover 410 in the moving process of the water tank 110 along with the furnace body 1, so that the upper end opening of the annular surrounding frame 170 is always sealed under the action of the sealing cover 410 and the water contained; the lower end of the pressure lever 4 extends into the furnace body 1 through the annular surrounding frame 170.
Example 3
As shown in fig. 1 to fig. 2, this embodiment is a further improvement on embodiment 2, and specifically includes the following steps:
the water tank 110 is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively connected with the water inlet pipe 120 and the water outlet pipe 130, and the water level in the water tank 110 can be constant through the water inlet of the water inlet pipe 120 and the water outlet of the water outlet pipe 130.
Example 4
As shown in fig. 1 to fig. 2, this embodiment is a further improvement on embodiment 2, and specifically includes the following steps:
the crucible in the furnace body 1 is provided with a plurality of ball sockets 140 along the moving direction, the ball sockets 140 are located in the area surrounded by the annular surrounding frame 170, generally, the more the number of the ball sockets 140 is, the more coke samples can be measured at a time, in this embodiment, the number of the ball sockets 140 is not less than 6, and the temperature which can be borne by the pressure rod 4 and the crucible is more than or equal to 1600 ℃.
Example 5
As shown in fig. 1 to fig. 2, this embodiment is a further improvement on embodiment 4, and specifically includes the following steps:
the furnace body 1 is internally provided with a silicon-molybdenum rod 150.
Example 6
As shown in fig. 1 to fig. 2, this embodiment is a further improvement on embodiment 5, and specifically includes the following steps:
the furnace body 1 is provided with a transparent hole, the coke high-temperature compressive strength measuring device further comprises a high-temperature camera 5, a lens of the high-temperature camera 5 faces a test sample placed in the furnace body 1, and the high-temperature camera 5 observes a sample in the furnace body 1 through the transparent hole.
Example 7
As shown in fig. 1 to fig. 2, this embodiment is a further improvement on embodiment 6, and specifically includes the following steps:
the linear driving mechanism 2 is preferably a screw rod linear sliding table, a base of the screw rod linear sliding table is provided with a furnace body displacement limiting control, and the moving stroke of the furnace body 1 is limited through the furnace body displacement limiting control.
Example 8
As shown in fig. 1 to fig. 2, this embodiment is a further improvement on embodiment 6, and specifically includes the following steps:
the coke high-temperature compressive strength measuring device also comprises a control box 6, wherein an intelligent control system and a micro printer electrically connected with the intelligent control system are arranged in the control box 6; the linear driving mechanism 2, the lifting mechanism 3, the force measuring sensor and the high-temperature camera 5 are respectively and electrically connected with an intelligent control system in the control box 6.
For each embodiment, the lifting mechanism 3 comprises a cross beam and a plurality of stand columns, at least one stand column is respectively arranged on each of two sides of the furnace body 1, the lower end of each stand column is fixed with a base of the linear driving mechanism, a screw rod transmission mechanism is arranged on each stand column, two ends of the cross beam are connected with the screw rod transmission mechanisms on the stand columns on two sides of the furnace body 1 so as to move up and down through driving of the screw rod transmission mechanisms, the upper end of the pressure rod 4 is connected with the cross beam through a force measuring sensor, in addition, pressure rod displacement limiting control is arranged on each stand column, and the stroke of the pressure rod 4 moving up and down is limited through the pressure rod. A method for analyzing the high-temperature compressive strength of coke comprises the following steps:
weighing 1Kg to 2Kg of blocky coke, preparing the blocky coke into spheres with the granularity of 22mm to 25mm by using a coke sample preparation screening machine and a coke particle chamfering machine in YB/T4494-2015 technical Specification for mechanical sample preparation of coke reactivity and post-reaction strength, then dividing, taking out 4 to 12 spherical coke samples, putting the prepared coke samples into a drying box, drying for 2 hours at 170 ℃ to 180 ℃, taking out the coke, cooling to room temperature, then placing the coke in a ball socket 140, and ensuring that the coke cannot roll off in the moving process of a furnace body;
heating the silicon-molybdenum rod 150 to heat the furnace body 1 at a temperature of 8-16 ℃, and introducing protective gas N at a flow rate of 1.0-3L/min2Heating to about 400 deg.C, introducing CO2Or H2When the temperature of reducing gas is increased to 1100-1400 ℃, the temperature is kept constant for 1-2 h, the position of the furnace body 1 is adjusted through the linear driving mechanism 2, a coke sample to be detected is positioned under the pressure lever 4, the pressure lever 4 is controlled to move downwards at the speed of 50-200 mm/min through the intelligent control system, the distance between the pressure lever 4 and the coke is observed through the high-temperature camera 5, when the pressure lever 4 approaches the coke, the speed of the pressure lever 4 is reduced to 20-50 mm/min, when the pressure lever 4 starts to press the coke, the pressure gradually rises, the coke is judged to be cracked by reducing the pressure from the peak value by 5-15%, then the pressure lever 4 stops pressing, the peak value is the compressive strength Q of the coke, as shown in figure 3, then the pressure lever 4 is lifted, the next coke compressive strength measurement is started, and after all measurements are finished, the CO is closed2And H2Introduction of N2Gas, power off until the coke cools to room temperature, and N is cut off2A gas; CO can be adjusted in the test process2Or H2Flow rate of (CO)2Is 2L/min-5 Lmin, H2The compressive strength of the coke at 1100-1400 ℃ can be measured, and the high-temperature compressive strength of the coke at different reaction times can be measured under the conditions of fixed atmosphere and fixed temperature, so that the influence of the atmosphere, the temperature and the reaction time on the high-temperature compressive strength of the coke can be researched;
the coke crushed in the test process is placed in N2Taking out the mixture after natural cooling under protection, and weighing the weight W1Beating with a drum of diameter phi 140mm, wall thickness of about 5mm, length of 700mm, rotating at 20r/min for 30min, and performing particle size analysis on the coke beaten by the drum with a 2mm round-hole sieveWeight of the oversize material of more than 2mm is recorded as W2Calculating R ═ W2/W1Analyzing the relation between the rotary drum strength R and the compressive strength Q, and ensuring that the R and Q values are simultaneously stabilized in a reasonable range;
researching the relationship between the coke high-temperature compressive strength and the optical structure of the coke, determining the coke optical structure by referring to YB/T077-2017 and determining the volume ratio V of a fine particle mosaic structure to an isotropic structure in the coke optical structure1And V2Will be structural ratio V1And V2Performing regression analysis with the high-temperature compressive strength Q of the coke to guide coal blending for coking when V is1And V2When the coke quality is normal, the Q value is low, and the Q value is improved by adjusting the coal blending structure so as to better meet the requirement of blast furnace production on the coke quality;
the blast furnace permeability index (index furnace permeability of blast furnace) is the ratio of air quantity to total pressure difference (namely the difference between hot air pressure and furnace top pressure) in the blast furnace smelting process, is represented by a symbol Tz, represents the capacity of the furnace for receiving the air quantity, is an important parameter capable of quickly, intuitively and comprehensively reflecting the furnace condition, researches the relation between Tz and coke compressive strength Q, takes the tuyere coke, analyzes the tuyere coke granularity and high-temperature thermal performance index and the coke high-temperature compressive strength Q, and accordingly finds out the index as the basis for judging the furnace condition and guides the blast furnace production.
If the coke sample is made into a cylinder or a cuboid, after the equipment is used for a period of time, the phenomenon that the lower surface of the pressure rod is not parallel to the upper surface of the coke sample can be generated due to factors such as the equipment, so that the local stress of the coke sample is not uniform, and the accuracy of the measured data is influenced.
Application example
Taking 2Kg of blocky coke, preparing the blocky coke into spheres with the granularity of 22-25 mm by using a coke sample preparation sieving machine and a coke particle chamfering machine in YB/T4494-2015 technical Specification for coke reactivity and strength after reaction mechanical sample preparation, then dividing, and taking out 6 spherical coke samples;
putting the prepared coke sample into a drying oven, drying for 2 hours at 170-180 ℃, taking out the coke and cooling to room temperature;
placing coke in a ball socket 140 on a crucible in the furnace body 1;
the furnace body 1 starts to heat up at the heating speed of 16 ℃/min, and N is firstly introduced at the flow rate of 2L/min2Heating to 400 deg.C, introducing CO2Heating to 1300 ℃, after keeping constant for 1 hour, adjusting the coke position to enable the coke sample to be detected to be positioned under a pressure lever 4, controlling the pressure lever 4 to move downwards at a speed of 100mm/min through computer software, reducing the speed of the pressure lever 4 to 30mm/min when the pressure lever 4 is close to the coke, gradually increasing the pressure when the pressure lever 4 starts to extrude the coke, judging that the coke is broken by reducing the pressure from 5% of a peak value, stopping pressing the pressure lever 4, wherein the peak value is the compressive strength Q of the coke, then lifting the pressure lever 4, starting to measure the compressive strength of the next coke, and closing CO after measuring all the coke samples, closing the CO2And H2Introduction of N2Gas, power off until the coke cools to room temperature, and N is cut off2Gas, wherein the high-temperature compressive strength Q of the coke is 5000-8000N through test determination;
CO adjustment during the test25L/min, coke and CO2The reaction time is 2 hours, the compressive strength of the coke under different temperature conditions of 1100 ℃, 1200 ℃, 1300 ℃ and 1400 ℃ is respectively measured, and the compressive strength is Q1, Q2, Q3, Q4 and Q5, and the influence of the temperature on Q is compared;
in CO2The high-temperature compressive strength of the coke with the reaction time of 0.5h, 1h and 2h is measured under the conditions of 5L/min and 1300 ℃, and the influence of the reaction time of the coke on Q can be found;
the determination method of the coke optical tissue refers to YB/T077-2017 to determine the volume ratio V of fine particle mosaic tissue to isotropic tissue in the coke optical tissue1And V2Will be structural ratio V1And V2Performing regression analysis on the high-temperature compressive strength Q of the coke to guide coal blending and coking;
fine granular structure V of optical structure of coke1Normal value is about 35%, and isotropic tissue structure V 25 percent, unsmooth blast furnace production in a certain period of time, low Q value of the high-temperature compressive strength of coke, and improvement and stability of Q value by adjusting the coal blending structureFixed V1And V2The ratio of (A) to (B), improves the stability of coke quality and improves the stability of blast furnace operation;
the air permeability index Tz of the blast furnace slides downwards, tuyere coke is taken out at high damping down, the particle size measurement is low, at the moment, the coke Q value is found to be low, the coke Q value is improved by changing the coal blending structure and optimizing the coking process parameters, the air permeability index Tz of the blast furnace is improved, the stability of the blast furnace is improved, and the Q value can be used as the basis for judging the furnace condition to guide the production of the blast furnace.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. The utility model provides a coke high temperature compressive strength survey device, its characterized in that, includes furnace body (1), sharp actuating mechanism (2), elevating system (3), force cell sensor and depression bar (4), furnace body (1) set up in on the sharp actuating mechanism (2), depression bar (4) arrange in furnace body (1) top, and its upper end through force cell sensor with elevating system (3) link to each other.
2. The coke high-temperature compression strength measuring device according to claim 1, wherein the furnace body (1) has a water tank (110) at the top, the upper end of the water tank (110) is open, an opening is formed in the bottom of the water tank (110), an annular surrounding frame (170) is arranged around the opening in the water tank (110), the annular surrounding frame (170) is connected with the bottom of the water tank (110) in a seamless manner, the upper end of the annular surrounding frame (170) is higher than the liquid level line of the water contained in the water tank (110), a sealing cover (410) is fixedly arranged on the pressure rod (4), the annular surrounding frame (170) is covered by the sealing cover (410), and the lower end of the sealing cover (410) is below the liquid level line of the water contained in the water tank (110); the lower end of the pressure lever (4) extends into the furnace body (1) through the annular surrounding frame (170).
3. The apparatus for determining high-temperature compressive strength of coke according to claim 2, wherein the water tank (110) is provided with a water inlet and a water outlet, and the water inlet and the water outlet are respectively connected to the water inlet pipe (120) and the water outlet pipe (130).
4. The coke high-temperature compression strength measuring device according to claim 3, characterized in that a plurality of ball sockets (140) are arranged on the crucible in the furnace body (1) along the moving direction, and the ball sockets (140) are positioned in the area surrounded by the annular surrounding frame (170).
5. The device for measuring the high-temperature compressive strength of the coke according to claim 4, wherein a silicon-molybdenum rod (150) is arranged in the furnace body (1).
6. The coke high-temperature compressive strength measuring device according to claim 5, wherein the furnace body (1) is provided with a transparent hole; still include high temperature camera (5), high temperature camera (5) see through the transparent hole and gather the test sample that places in furnace body (1).
7. The device for measuring the high-temperature compressive strength of coke according to claim 6, wherein the linear driving mechanism (2) is a screw linear sliding table.
8. The coke high-temperature compression strength measuring device according to claim 7, characterized by further comprising a control box (6), wherein the control box (6) is internally provided with an intelligent control system and a micro printer electrically connected with the intelligent control system; the linear driving mechanism (2), the lifting mechanism (3), the force measuring sensor and the high-temperature camera (5) are respectively and electrically connected with an intelligent control system in the control box (6).
9. An analytical method for determining the compressive strength of coke using the apparatus for measuring the compressive strength of coke according to claim 8, comprising the steps of:
making coke into a spherical shape with the granularity of 22-25 mm, and placing the spherical shape in a ball socket (140);
heating the silicon-molybdenum rod (150) to heat the furnace body (1), and simultaneously introducing protective gas N at the flow rate of 1.0-3L/min2Heating to about 400 deg.C, introducing CO2Or H2Heating to 1100-1400 ℃, keeping constant for 1-2 h, adjusting the position of a furnace body (1) through a linear driving mechanism (2) to enable a coke sample to be detected to be positioned under a pressure lever (4), controlling the pressure lever (4) to move downwards at the speed of 50-200 mm/min through an intelligent control system, observing the distance between the pressure lever (4) and coke through a high-temperature camera (5), when the pressure lever (4) is close to the coke, reducing the speed of the pressure lever (4) to 20-50 mm/min, when the pressure lever (4) begins to extrude the coke, gradually increasing the pressure, judging that the coke is broken by reducing the pressure from 5-15% of the peak value, then stopping the pressure-down of the pressure lever (4), wherein the peak value is the compressive strength Q of the coke, then lifting the pressure lever (4), starting to measure the compressive strength of the next coke until all measures are finished, CO shutoff2And H2Introduction of N2Gas, power off until the coke cools to room temperature, and N is cut off2A gas;
the coke crushed in the test process is placed in N2Taking out the mixture after natural cooling under protection, and weighing the weight W1Beating with a rotary drum, performing particle size analysis on the coke beaten by the rotary drum with a round hole sieve, and recording the weight of the oversize material W2Calculating R ═ W2/W1Analyzing the relation between the rotary drum strength R and the compressive strength Q, and ensuring that the R and Q values are simultaneously stabilized in a reasonable range;
measuring the volume ratio V of fine particle mosaic structure to isotropic structure in coke optical structure1And V2Will be structural ratio V1And V2Performing regression analysis with the high-temperature compressive strength Q of the coke to guide coal blending for coking when V is1And V2When the coal blending structure is normal, the Q value is low, and the Q value is improved by adjusting the coal blending structure;
researching the relation between Tz and the coke compressive strength Q, taking the tuyere coke, and analyzing the tuyere coke granularity, the high-temperature thermal performance index and the coke high-temperature compressive strength Q.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011377708.0A CN112611650B (en) | 2020-11-30 | 2020-11-30 | Coke high-temperature compressive strength measuring device and analysis method |
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| CN114459887A (en) * | 2022-01-10 | 2022-05-10 | 首钢集团有限公司 | Coke compressive strength measuring tool and device |
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| JP2007284615A (en) * | 2006-04-19 | 2007-11-01 | Sumitomo Metal Ind Ltd | Method for estimating coke strength |
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| JP2007284615A (en) * | 2006-04-19 | 2007-11-01 | Sumitomo Metal Ind Ltd | Method for estimating coke strength |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114459887A (en) * | 2022-01-10 | 2022-05-10 | 首钢集团有限公司 | Coke compressive strength measuring tool and device |
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