CN108728600B - System, method and device for detecting activity of blast furnace hearth - Google Patents
System, method and device for detecting activity of blast furnace hearth Download PDFInfo
- Publication number
- CN108728600B CN108728600B CN201810596710.3A CN201810596710A CN108728600B CN 108728600 B CN108728600 B CN 108728600B CN 201810596710 A CN201810596710 A CN 201810596710A CN 108728600 B CN108728600 B CN 108728600B
- Authority
- CN
- China
- Prior art keywords
- slag
- container
- iron
- blast furnace
- initial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2300/00—Process aspects
- C21B2300/04—Modeling of the process, e.g. for control purposes; CII
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
- Manufacture Of Iron (AREA)
Abstract
The embodiment of the invention provides a system, a method and a device for detecting activity of a blast furnace hearth, relates to the technical field of activity detection of the blast furnace hearth, and can accurately reflect the activity of the blast furnace hearth in real time by calculating the retention rate of iron slag. The system comprises: the device comprises a first container, a second container, a heating furnace, a temperature sensor, a measuring device and a processor, wherein the first container for containing iron slag is reversely buckled on the second container for containing smooth coke particles, and the two containers are suspended in the heating furnace; the temperature sensor is arranged at a designated position above the first container and used for measuring the temperature of the iron slag; the measuring device is used for measuring the initial mass of the slag iron contained in the first container, the initial total mass of the first container for containing the slag iron and the initial total mass of the second container for containing the smooth coke particles and the total mass after heating; and the processor is used for determining the slag iron retention rate according to the three qualities to be used as a first reference value for evaluating the activity of the blast furnace hearth. The technical scheme provided by the invention is suitable for the process of determining the activity of the blast furnace hearth.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of blast furnace hearth activity detection, in particular to a system, a method and a device for detecting activity of a blast furnace hearth.
[ background of the invention ]
At present, blast furnace hearth accidents occur frequently due to the reasons of deterioration of iron-making raw fuel resources, rising of smelting strength, great increase of blast furnace slag quantity, deterioration of air permeability and liquid permeability of hearth material columns and the like, and great potential safety hazards and economic losses are brought to the production process. Therefore, in order to realize the safety and reliability of the blast furnace, reduce the resource consumption cost of the blast furnace and accurately and efficiently determine the activity of the hearth of the blast furnace, the key problem to be solved urgently is solved.
In the prior art, the quantitative indexes for detecting the activity of the blast furnace hearth mainly comprise a hearth activity index, a hearth working tapping index, a blast furnace hearth temperature and the like. Wherein, the hearth activity index is determined by the temperature mean value of each layer of central thermocouples at the hearth bottom and the temperature mean value of each layer of thermocouples at the side wall of the hearth; or the sum of the resistance coefficient of the slag iron flowing into the hearth and the resistance coefficient of the slag iron flowing out of the hearth is used for representing; or based on a hearth activity index model, determining the pressure difference of the dead charge column and the temperature intensity of the slag of the dead charge column; or based on a physical thermal index model, measuring by using the corresponding relation between the physical heat of the molten iron and the chemical heat of the silicon content of the molten iron. The working tapping index of the hearth takes the daily output of iron of the blast furnace as a parameter for judging the activity of the hearth of the blast furnace. The temperature of the blast furnace hearth takes the temperature of the dead material column in the center of the blast furnace hearth as a standard for judging the activity of the hearth.
At present, the quantitative indexes for detecting the activity of the blast furnace hearth indirectly represent the activity condition of the hearth by means of parameters reflected by the blast furnace mainly according to actual production experience.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
according to actual production experience, the activity of the hearth is indirectly represented through parameters reflected by the blast furnace, the real states of slag iron and coke in the hearth of the blast furnace cannot be intuitively reflected, and the method for determining the activity of the hearth of the blast furnace has certain hysteresis and lacks theoretical guidance for actual production.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a system, a method, and a device for detecting activity of a blast furnace hearth, which can intuitively reflect real states of iron slag and coke in the blast furnace hearth and accurately determine the activity of the blast furnace hearth in real time.
In a first aspect, an embodiment of the present invention provides a system for detecting activity of a blast furnace hearth, where the system includes: a first container, a second container, a heating furnace, a temperature sensor, a measuring device and a processor,
the first container is used for containing iron slag, the bottom of the second container is provided with a hole for containing smooth coke particles, the first container for containing iron slag is reversely buckled on the second container for containing smooth coke particles, and the first container for containing iron slag and the second container for containing smooth coke particles are hung in the heating furnace;
the heating furnace is used for simulating the actual temperature of the blast furnace so as to heat the iron slag contained in the first container;
the temperature sensor is arranged at a designated position above the first container and used for measuring the temperature of the iron slag;
the measuring device is used for measuring the initial mass of the slag iron contained in the first container, the initial total mass of the first container for containing the slag iron and the second container for containing the smooth coke particles and the total mass after heating;
and the processor is used for determining the retention rate of the slag iron according to the initial mass of the slag iron, the initial total mass and the heated total mass.
The above-described aspects and any possible implementation further provide an implementation, and the system further includes:
and the third container is positioned below the second container and is used for receiving the molten liquid of the iron slag flowing out of the hole of the second container.
There is further provided in accordance with the above-described aspect and any possible implementation, an implementation in which the measuring device includes a scale.
The above aspect and any possible implementation further provide an implementation, in which the first container is a magnesium oxide crucible and the second container is a graphite crucible.
The above aspects and any possible implementations further provide an implementation in which the first container for containing the iron slag is provided with a sealing film layer.
In a second aspect, an embodiment of the present invention provides a method for detecting activity of a blast furnace hearth, where the method is applied to a system according to any one of the above aspects and any possible implementation manner, and the method includes:
acquiring the initial mass of the iron slag contained in the first container, and acquiring the initial total mass of the first container for containing the iron slag and the second container for containing the smooth coke particles;
heating the slag iron contained in the first container, and obtaining the total heated mass of the first container containing the slag iron and the second container containing the smooth coke particles after the slag iron reaches a specified temperature;
and determining the retention rate of the iron slag according to the initial mass of the iron slag, the initial total mass and the heated total mass to be used as a first reference value for evaluating the activity of the blast furnace hearth.
The above-described aspects and any possible implementations further provide an implementation, and the method further includes:
in the heating process of the slag iron, obtaining the initial time and the termination time of dropping the molten liquid of the slag iron;
and determining the dropping speed of the molten liquid of the iron slag according to the initial time and the termination time to be used as a second reference value for evaluating the activity of the blast furnace hearth.
The above aspect and any possible implementation manner further provide an implementation manner, wherein the iron slag retention rate is expressed by the following formula (1):
wherein eta iszRepresents the slag iron retention, M represents the initial slag iron mass, M1 represents the initial total mass, and M2 represents the heated total mass.
In a third aspect, an embodiment of the present invention provides an apparatus for detecting activity of a blast furnace hearth, where the apparatus includes:
the first obtaining unit is used for obtaining the initial mass of the iron slag contained in the first container and obtaining the initial total mass of the first container for containing the iron slag and the second container for containing the smooth coke particles;
the second acquisition unit is used for heating the slag iron contained in the first container, and acquiring the total heated mass of the first container for containing the slag iron and the second container for containing the smooth coke particles after the slag iron reaches a specified temperature;
and the first determining unit is used for determining the retention rate of the slag iron according to the initial mass of the slag iron, the initial total mass and the heated total mass to be used as a first reference value for evaluating the activity of the blast furnace hearth.
The above-described aspects and any possible implementations further provide an implementation, where the apparatus further includes:
the third acquisition unit is used for acquiring the initial time and the termination time of dropping the molten liquid of the slag iron in the heating process of the slag iron;
and the second determination unit is used for determining the dropping speed of the molten liquid of the iron slag according to the initial time and the termination time to be used as a second reference value for evaluating the activity of the blast furnace hearth.
The invention provides a system, a method and a device for detecting activity of a blast furnace hearth, wherein a process that molten slag iron in the blast furnace hearth passes through coke particles is accurately simulated through a first container for containing the slag iron, a second container for containing the coke particles, a heating furnace, a measuring device, a temperature sensor and a processor, so that a real slag iron smelting state in the blast furnace hearth is intuitively reflected, and the activity of the blast furnace hearth can be timely and accurately reflected on the basis of the initial slag iron mass contained in the first container, the initial total mass of the first container for containing the slag iron and the second container for containing the smooth coke particles and the slag iron retention rate calculated by the total mass after heating in the system so as to theoretically guide actual production.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a system for detecting activity of a blast furnace hearth according to an embodiment of the invention;
FIG. 2 is a flowchart of a method for detecting activity of a blast furnace hearth according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for detecting the activity of a blast furnace hearth according to the embodiment of the invention;
FIG. 4 is a schematic view of a titanium-containing slag melt after passing through coke particles according to an embodiment of the present invention;
FIG. 5 is a block diagram of an apparatus for detecting activity of a blast furnace hearth according to an embodiment of the present invention;
fig. 6 is a block diagram of another apparatus for detecting activity of a blast furnace hearth according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The inside of the blast furnace hearth is filled with a large amount of coke, namely a dead coke pile. One of the main functions of the dead coke pile is to ensure the smooth operation of the blast furnace, and the internal coke window can be used as a channel, so that the iron slag melt generated by the dripping zone can smoothly flow down, and can be used as a vent hole in the blast furnace to directly determine the distribution state of the blast furnace gas flow. Therefore, the degree of permeability of the dead coke heap directly influences the smelting condition in the blast furnace hearth.
Under the high temperature state, the slag iron melt can complete a series of material transfer and physicochemical reaction processes when passing through the coke window, the slag iron entering the coke window and the slag iron melt can react with coke in the coke window, and simultaneously the slag iron can also react with reducing gas in the gas flow, in addition, different slag iron components have different wettabilities with the coke, and in addition, the properties and the composition granularity of the coke are different, and the factors can cause a certain amount of slag iron to be retained in the coke window. If slag iron enters the coke window and then quickly passes through the coke window, the amount of slag iron retained in the coke window is small, the resistance of the coke window to gas flow is small, blast furnace gas can smoothly enter the upper part of the blast furnace through the coke window to enable the blast furnace to move forwards, but if the slag iron dripped into the coke window cannot timely pass through the coke window, a large amount of slag iron can be accumulated in the coke window, the air permeability resistance of the coke window is increased, the gas flow of the blast furnace cannot smoothly pass through the coke window to enable the gas flow to be distributed unreasonably, and finally the temperature distribution in the coke window is uneven, and the blast furnace cannot move forwards. Similarly, the smooth degree of the slag iron passing through the coke window is also influenced by the retention amount of the slag iron in the coke window, and the slag iron cannot smoothly pass through the coke window and can be gathered to flow through a single channel or the side surface of a dead coke pile, so that the conditions of abnormal flow state of the slag iron melt in the blast furnace hearth, uneven temperature distribution and the like are caused, and the safety and the service life of the hearth are seriously influenced.
Therefore, the slag iron performance and the permeability of the coke window can influence the slag iron retention in the coke window, and further influence the activity of the blast furnace hearth. Therefore, in order to determine the activity of the blast furnace hearth, it is important to know the real state of the slag iron passing through the coke window and the influence rule of the coke window on the retention rate of the slag iron.
In view of this, the embodiment of the present invention provides a system for detecting activity of a blast furnace hearth, which simulates a behavior of slag iron from dropping to passing through a coke window, can reflect a real state of the slag iron passing through the coke window, can calculate a slag iron retention rate, and is suitable for a process of determining the activity of the blast furnace hearth.
The slag iron mentioned in the examples of the present invention may be any one of slag, slag iron mixture, and molten iron.
As shown in fig. 1, the system includes: a first container 11, a second container 12, a heating furnace 13, a temperature sensor 14, a measuring device 15, and a processor 16.
The first container 11 is used for containing iron slag, the bottom of the second container 12 is provided with holes for containing smooth coke particles, the first container 11 for containing iron slag is reversely buckled on the second container 12 for containing smooth coke particles, and the first container 11 for containing iron slag and the second container 12 for containing smooth coke particles are suspended in the heating furnace 13.
It should be noted that, in order to truly simulate the state of the coke in the hearth of the blast furnace, the coke in the actual production of the blast furnace is usually selected, and is crushed into coke particles, and the coke particles are used in the method provided by the embodiment of the present invention after being rounded.
Considering the feasibility of the implementation method, the material of the first container 11 should not react with the iron slag at high temperature, and the material of the second container 12 should not react with the coke at high temperature, so that the first container 11 can adopt a magnesium oxide crucible (which can be used for containing iron slag mixture) or a corundum crucible (which can be used for containing molten iron) or a molybdenum crucible (which can be used for containing slag); the second vessel 12 is typically a graphite crucible.
The heating furnace 13 simulates the actual temperature of the blast furnace for heating the iron slag contained in the first container 11.
The temperature sensor 14 is arranged at a designated position above the first container 11 and is used for measuring the temperature of the slag iron.
The measuring device 15 is used for measuring the initial mass of the slag iron contained in the first container 11, the initial total mass of the first container 11 for containing the slag iron and the second container 12 for containing the smooth coke particles and the total mass after heating.
In a specific application scenario, the heating furnace 13 may be a high temperature tube furnace, the temperature sensor 14 may be a thermocouple, and the measuring device 15 may be a balance.
It should be noted that, as shown in fig. 1, in order to conveniently and quickly observe the change state of the total mass of the first container 11 for holding iron slag and the second container 12 for holding round and smooth coke particles in real time during the heating process, the first container 11 for holding iron slag and the second container 12 for holding round and smooth coke particles may be hung on the measuring device 15 (i.e., the measuring device 15 may display the total mass of the first container 11 for holding iron slag and the second container 12 for holding round and smooth coke particles in real time). And the first container 11 and the second container 12 are located in a constant temperature area in a heating furnace 13.
The processor 16 is configured to determine a slag iron retention rate based on the initial slag iron mass, the initial total mass, and the heated total mass.
In an alternative embodiment, the first container 11 for containing the iron slag is provided with a sealing film layer. Specific examples are as follows: weighing a certain mass of slag iron (slag iron mixture) after pre-melting, putting the slag iron into a magnesium oxide crucible, sealing the magnesium oxide crucible by using an adhesive tape (an optional sealing film layer), compacting the slag iron towards one end of the adhesive tape, and then reversely buckling the magnesium oxide crucible into a graphite crucible containing smooth coke particles to ensure that the adhesive tape is tightly attached to the coke particles.
Optionally, as shown in fig. 1, the system further comprises a third container 17, wherein the third container 17 is positioned below the second container 12 and is used for receiving the molten liquid of the iron slag flowing out of the hole of the second container 12.
In a particular application scenario, the third container 17 may be a corundum crucible.
The embodiment of the invention provides a system for detecting activity of a blast furnace hearth, which simulates a process that molten slag iron in the blast furnace hearth passes through coke particles through a first container 11 for containing the slag iron, a second container 12 for containing the coke particles, a heating furnace 13, a temperature sensor 14, a measuring device 15 and a processor 16, intuitively reflects real states of the slag iron and the coke particles in the blast furnace hearth, and calculates a slag iron retention rate based on the initial mass of the slag iron contained in the first container 11, the initial total mass of the first container 11 for containing the slag iron and the second container 12 for containing the smooth coke particles and the total mass after heating. The retention effect of the coke window on the iron slag and the smooth degree of the iron slag flowing through the coke window are represented by the retention rate of the iron slag, the larger the retention rate of the iron slag, the stronger the blocking effect of the coke window on the flow of the iron slag, the more the retention amount of the iron slag, the more difficult the flow, and the poorer the activity of the blast furnace hearth; the smaller the retention rate, the better the activity of the blast furnace hearth. Therefore, the scheme provided by the embodiment of the invention can timely and accurately reflect the activity of the blast furnace hearth, and further carry out theoretical guidance on actual production.
The method for detecting the activity of the blast furnace hearth in the embodiment of the invention is suitable for the system for detecting the activity of the blast furnace hearth, and as shown in fig. 2, the method comprises the following steps:
s201, obtaining the initial mass of the iron slag contained in the first container, and obtaining the initial total mass of the first container containing the iron slag and the second container containing the smooth coke particles.
S202, heating the slag iron contained in the first container, and obtaining the total heated mass of the first container for containing the slag iron and the second container for containing the smooth coke particles after the slag iron reaches a specified temperature.
For the safety of operation and the accuracy of experiment, when the first container containing the iron slag is heated, high-purity argon can be introduced into the heating furnace as a protective gas.
When the slag iron contained in the first container is heated, the slag iron is gradually softened and melted with the increase of the temperature, passes through the smooth coke particles in the second container, and drops from the bottom hole of the second container. Therefore, the total mass of the first container for containing the iron slag and the second container for containing the smooth coke particles is gradually reduced, and when the total mass reaches a stable state, the first container is stopped being heated, and the total mass at the moment is used as the total mass after the first container for containing the iron slag and the second container for containing the smooth coke particles are heated.
S203, determining the retention rate of the iron slag according to the initial mass of the iron slag, the initial total mass and the heated total mass to be used as a first reference value for evaluating the activity of the blast furnace hearth.
If using ηzRepresenting the slag iron retention rate, M representing the initial slag iron mass, M1 representing the initial total mass, M2 representing the heated total mass, then:
dropping quality of the slag iron melt: M1-M2 (M0 ═ M1)
Retention quality of iron slag: M-M0
Final iron slag retention rate etazMay be represented by formula (1):
the retention effect of the coke window on the iron slag and the smooth degree of the iron slag flowing through the coke window can be represented by the retention rate of the iron slag, the larger the retention rate of the iron slag, the stronger the blocking effect of the coke window on the flow of the iron slag, the more the retention amount of the iron slag, the more difficult the flow and the poorer the activity of the blast furnace hearth; the smaller the retention rate, the better the activity of the blast furnace hearth.
The invention embodiment provides a method for detecting activity of a blast furnace hearth, which simulates the process of slag iron melt liquid in the blast furnace hearth to pass through coke particles through a first container for containing slag iron, a second container for containing coke particles, a heating furnace, a temperature sensor, a measuring device and a processor, intuitively reflects the real states of the slag iron and the coke particles in the blast furnace hearth, and can timely and accurately reflect the activity of the blast furnace hearth so as to theoretically guide actual production on the basis of the initial slag iron mass of the first container, the initial total mass of the first container for containing slag iron and the second container for containing smooth coke particles and the slag iron retention rate calculated by the total mass after heating in the system.
Further, in combination with the foregoing method flow, considering that the dripping speed of the molten slag may also reflect the activity of the blast furnace hearth during the heating process of the molten slag, another possible implementation manner of the embodiment of the present invention further provides the following specific method flow, as shown in fig. 3, where the method further includes:
s301, in the heating process of the slag iron, obtaining the initial time and the termination time of dropping the molten liquid of the slag iron.
And S302, determining the dropping speed of the molten liquid of the iron slag according to the initial time and the termination time, and using the dropping speed as a second reference value for evaluating the activity of the blast furnace hearth.
Specifically, the first container for holding the iron slag and the second container for holding the smooth coke particles are hung on a measuring device, the time when the indication number of the measuring device begins to change directly reflects the time when the molten iron slag begins to drip, which can be recorded as t1, and after the iron slag is heated, the time when the dripping ends can be determined according to the time when the indication number of the measuring device is stable, which is recorded as t 2; then the dropping time zone ≠ t ═ t2-t1 of the slag iron melt.
The dripping time interval of the slag iron melt can reflect the dripping speed of the slag iron melt. The smaller the dropping time interval is, the faster the slag iron melt can pass through the coke pile, which can indicate that the slag iron in the blast furnace hearth flows more smoothly, and can also indicate that the activity of the blast furnace hearth is better, and conversely, the activity is worse.
In the method provided by the embodiment of the invention, the first container and the second container are very convenient to mount and pick, and the molten slag iron can be recovered after the molten slag iron is dripped, and the subsequent detection and observation can be continued. For example, the second container cooled to room temperature can be treated by resin filling, the section of the second container is observed to study the shape and state of the iron slag when the iron slag passes through the coke particles, and the inner hole of the coke window and the retention characteristics of the iron slag melt are observed; and further carrying out microscopic analysis on the phase characteristics of the interface between the iron slag and the coke particles, and determining the influence mechanism of the coke particle properties and the iron slag components on the retention rate of the iron slag.
Based on the above analysis process, the embodiment of the invention provides a specific implementation method for testing FeO (ferrous oxide) and TiO (titanium oxide) in the titanium-containing primary slag2(titanium dioxide) influence on the initial slag Retention RateThe method comprises the following steps:
Wherein, the six groups of titanium-containing initial slag components are shown in the table 1:
TABLE 1 composition of initial slag containing titanium (unit: mass% by weight)
Wherein, in Table 1, CaO means calcium oxide, SiO2Refers to silicon dioxide, Al2O3Refers to alumina, and MgO refers to magnesia. It should be noted that, among the six titanium-containing primary slag components, CaO and SiO are contained2The mass percent of the slag is different, but in each group of titanium-containing primary slag, CaO and SiO2The molar ratio of the titanium-containing primary slag is the same, namely the binary basicity of the six groups of titanium-containing primary slag is consistent, and CaO and SiO are2And does not constitute a variable of each titanium-containing primary slag component.
And 3, placing the corundum crucible into the bottom of the high-temperature tube furnace to receive the titanium-containing primary slag molten liquid after penetrating through the coke particles, then hanging the graphite crucible on a balance, recording the reading of the balance, and placing the bottom end of a thermocouple at the position 5mm above the molybdenum crucible.
And 4, introducing high-purity argon as a protective gas, and heating the titanium-containing primary slag. The adhesive tape can volatilize along with the rise of the temperature, the titanium-containing primary slag is gradually softened and melted and drops into the corundum crucible through the coke particles, the reading of the balance can be gradually reduced, the temperature rise is finished when the reading of the balance is stable, and the reading of the balance is recorded again.
And 5, arranging data obtained by heating the six groups of titanium-containing primary slag, and calculating the retention rate of the primary slag through the change of scale readings and the mass of the primary titanium-containing primary slag shown in the table 2.
TABLE 2 variation of the initial titanium-containing slag passing through the coke grains (initial mass of the initial titanium-containing slag was 100g)
As can be seen from comparison of the data of the groups 1, 4 and 6, when the FeO content is fixed at 15%, the TiO content is fixed at 15%2When not more than 10%, TiO2The influence of the content on the retention rate of the primary slag is small. When it is TiO2When the content reaches 15%, the retention rate of the primary slag is greatly increased, and it can be inferred that the hearth activity is relatively poor under the condition of high titanium content, which is consistent with the actual operation condition of the blast furnace hearth. In addition, the results of six groups of initial slag retention rate are observed, and when the FeO content and the TiO content are in the range2When the content is 10%, the retention rate of the titanium-containing primary slag is the minimum, and the activity of the blast furnace hearth is the best.
And 6, after the temperature rise is finished, quickly taking out the graphite crucible, cooling the graphite crucible, and filling resin into the focusing particles after the graphite crucible is cooled to the room temperature. Wherein, the shapes of the six groups of titanium-containing primary slag molten liquid after passing through the coke particles are shown as (1), (2), (3), (4), (5) and (6) in the figure 4 in sequence.
The technical scheme provided by the embodiment of the invention can solve the problem of influence of a coke window on the retention rate of the iron slag under different coke properties, iron slag components and component proportion conditions. And furthermore, the change rule of the dropping rate of the slag iron and the retention rate of the slag iron along with the composition and the component proportion of the slag iron and the property of coke can be determined by analyzing the change relation of the dropping quality along with the dropping time when the slag iron in the blast furnace hearth passes through the coke window.
The embodiment of the invention provides a device for detecting activity of a blast furnace hearth, which is suitable for the method flow, and as shown in fig. 5, the device comprises:
a first obtaining unit 51, configured to obtain an initial mass of the slag iron contained in the first container, and obtain an initial total mass of the first container containing the slag iron and the second container containing the round and smooth coke particles.
And a second obtaining unit 52, configured to obtain a total heated mass of the first container for containing the iron slag and the second container for containing the smooth coke particles after the iron slag contained in the first container is heated and reaches a specified temperature.
And the first determining unit 53 is used for determining the retention rate of the iron slag according to the initial mass of the iron slag, the initial total mass and the heated total mass, and the retention rate is used as a first reference value for evaluating the activity of the blast furnace hearth.
Optionally, as shown in fig. 6, the apparatus further includes:
a third obtaining unit 61 for obtaining an initial time and a final time of dropping the molten liquid of the slag iron in the heating process of the slag iron.
And a second determination unit 62 for determining a dropping speed of the molten liquid of the iron slag as a second reference value for evaluating the activity of the blast furnace hearth according to the initial time and the end time.
The invention embodiment provides a device for detecting activity of a blast furnace hearth, which simulates the process of slag iron melt liquid in the blast furnace hearth to pass through coke particles through a first container for containing slag iron, a second container for containing coke particles, a heating furnace, a temperature sensor, a measuring device and a processor, intuitively reflects the real states of the slag iron and the coke particles in the blast furnace hearth, and can timely and accurately reflect the activity of the blast furnace hearth so as to theoretically guide actual production on the basis of the initial slag iron mass of the first container, the initial total mass of the first container for containing slag iron and the second container for containing smooth coke particles and the slag iron retention rate calculated by the total mass after heating in the system.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
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, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A system for detecting blast furnace hearth activity, the system comprising: a first container, a second container, a heating furnace, a temperature sensor, a measuring device and a processor,
the first container is used for containing iron slag, the bottom of the second container is provided with a hole for containing smooth coke particles, the first container for containing iron slag is reversely buckled on the second container for containing smooth coke particles, and the first container for containing iron slag and the second container for containing smooth coke particles are hung in the heating furnace;
the heating furnace is used for simulating the actual temperature of the blast furnace so as to heat the iron slag contained in the first container;
the temperature sensor is arranged at a designated position above the first container and used for measuring the temperature of the iron slag;
the measuring device is used for measuring the initial mass of the slag iron contained in the first container, the initial total mass of the first container for containing the slag iron and the second container for containing the smooth coke particles and the total mass after heating;
the processor is used for determining the retention rate of the slag iron according to the initial mass of the slag iron, the initial total mass and the heated total mass;
the system further comprises:
and the third container is positioned below the second container and is used for receiving the molten liquid of the iron slag flowing out of the hole of the second container.
2. The system of claim 1, wherein the measuring device comprises a scale.
3. The system of claim 1, wherein the first container is a magnesium oxide crucible and the second container is a graphite crucible.
4. The system of claim 1, wherein the first container of slag iron is provided with a sealing film layer.
5. A method for detecting blast furnace hearth activity, characterized in that, the method is applied to the system of any one of claims 1 to 4, the method comprises:
acquiring the initial mass of the iron slag contained in the first container, and acquiring the initial total mass of the first container for containing the iron slag and the second container for containing the smooth coke particles;
heating the slag iron contained in the first container, and obtaining the total heated mass of the first container containing the slag iron and the second container containing the smooth coke particles after the slag iron reaches a specified temperature;
determining the retention rate of the iron slag according to the initial mass of the iron slag, the initial total mass and the heated total mass, and taking the retention rate of the iron slag as a first reference value for evaluating the activity of the blast furnace hearth;
the method further comprises the following steps:
in the heating process of the slag iron, obtaining the initial time and the termination time of dropping the molten liquid of the slag iron;
determining the dropping speed of the molten liquid of the iron slag according to the initial time and the termination time, and using the dropping speed as a second reference value for evaluating the activity of the blast furnace hearth;
the expression of the slag iron retention rate is shown as the formula (1):
wherein η z represents a slag iron retention rate, M represents the initial slag iron mass, M1 represents the initial total mass, and M2 represents the heated total mass.
6. An apparatus for detecting blast furnace hearth activity, said apparatus comprising:
the first obtaining unit is used for obtaining the initial mass of the iron slag contained in the first container and obtaining the initial total mass of the first container for containing the iron slag and the second container for containing the smooth coke particles;
the second acquisition unit is used for heating the slag iron contained in the first container, and acquiring the total heated mass of the first container for containing the slag iron and the second container for containing the smooth coke particles after the slag iron reaches a specified temperature;
the first determining unit is used for determining the retention rate of the slag iron according to the initial mass of the slag iron, the initial total mass and the heated total mass to be used as a first reference value for evaluating the activity of the blast furnace hearth;
the device further comprises:
the third acquisition unit is used for acquiring the initial time and the termination time of dropping the molten liquid of the slag iron in the heating process of the slag iron;
and the second determination unit is used for determining the dropping speed of the molten liquid of the iron slag according to the initial time and the termination time to be used as a second reference value for evaluating the activity of the blast furnace hearth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810596710.3A CN108728600B (en) | 2018-09-06 | 2018-09-06 | System, method and device for detecting activity of blast furnace hearth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810596710.3A CN108728600B (en) | 2018-09-06 | 2018-09-06 | System, method and device for detecting activity of blast furnace hearth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108728600A CN108728600A (en) | 2018-11-02 |
| CN108728600B true CN108728600B (en) | 2020-12-29 |
Family
ID=63932971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810596710.3A Active CN108728600B (en) | 2018-09-06 | 2018-09-06 | System, method and device for detecting activity of blast furnace hearth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108728600B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110343795A (en) * | 2019-07-30 | 2019-10-18 | 安徽工业大学 | A kind of active quantization signifying method of blast furnace crucibe |
| CN111638316B (en) * | 2020-05-29 | 2022-09-16 | 鞍钢股份有限公司 | Device and method for simulating coke reaction at high-temperature section of blast furnace |
| WO2022168556A1 (en) * | 2021-02-03 | 2022-08-11 | Ｊｆｅスチール株式会社 | Method for detecting remaining amount of liquid and detection device for same, method for detecting remaining amount of molten substance and detection device for same, and vertical furnace operation method |
| CN113791108B (en) * | 2021-09-17 | 2024-03-22 | 苏州大学 | Method for measuring soft melting dropping performance of iron-containing raw material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54109015A (en) * | 1978-02-14 | 1979-08-27 | Sumitomo Metal Ind Ltd | Countermeasure taking method to cope with cooling incident in blast furnace |
| JPH0570813A (en) * | 1991-09-12 | 1993-03-23 | Nippon Steel Corp | Method for operating blast furnace |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388613B (en) * | 2014-11-13 | 2016-06-29 | 北京首钢股份有限公司 | A kind of method of blast furnace crucibe activity quantitative assessment |
| CN104878138A (en) * | 2015-05-04 | 2015-09-02 | 南京钢铁股份有限公司 | Method for determining softening dropping property of blast furnace comprehensive burden |
| CN205506607U (en) * | 2016-03-14 | 2016-08-24 | 唐山学院 | Blast furnace lower part sediment iron melts is detained simulating measurement setup of characteristic |
| CN106755672A (en) * | 2017-02-27 | 2017-05-31 | 本钢板材股份有限公司 | The furnace cylinder working active index quantization method of monitoring blast furnace crucibe activity |
| CN107643242B (en) * | 2017-08-17 | 2019-11-01 | 武汉科技大学 | A kind of evaluation method and device of blast furnace stock column liquid permeability |
-
2018
- 2018-09-06 CN CN201810596710.3A patent/CN108728600B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54109015A (en) * | 1978-02-14 | 1979-08-27 | Sumitomo Metal Ind Ltd | Countermeasure taking method to cope with cooling incident in blast furnace |
| JPH0570813A (en) * | 1991-09-12 | 1993-03-23 | Nippon Steel Corp | Method for operating blast furnace |
Non-Patent Citations (1)
| Title |
|---|
| 高炉合理鼓风动能与炉缸活性的关系;代兵等;《钢铁》;20160215;第51卷(第02期);第22-27页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108728600A (en) | 2018-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108728600B (en) | System, method and device for detecting activity of blast furnace hearth | |
| Mills | The estimation of slag properties | |
| Tamminen | Thermal analysis for investigation of solidification mechanisms in metals and alloys | |
| CN201145676Y (en) | Iron ore melting dripping test device | |
| Schmidt et al. | Water solubility in phonolite melts: Influence of melt composition and temperature | |
| CN101915774B (en) | Method for determining melting point of organic matter by differential scanning calorimeter | |
| CN102507373B (en) | Measuring device and method of melting volume expansion ratio/molten state density of material | |
| Brandaleze et al. | Mould fluxes in the steel continuous casting process | |
| CN102213548A (en) | Molten drop furnace for measuring molten drop point of iron ore | |
| Wen et al. | Simulation and characterization on heat transfer through mould slag film | |
| EP1925936A1 (en) | New thermal analysis device | |
| CN105588781A (en) | Device and method for measuring dissolution rate of impurities in metallurgy slag | |
| Sarkar et al. | Isothermal and non-isothermal crystallization kinetics of mold fluxes used in continuous casting of steel: a review | |
| CN201749093U (en) | High temperature parameter measurement experimental apparatus of metallic material | |
| CN109084834B (en) | Liquid level and temperature measuring device suitable for titanium sponge reduction reaction | |
| Łabaj et al. | Surface tension of expanded slag from steel manufacturing in electrical furnace | |
| Firth et al. | Experimental constraints on the differentiation of low-alkali magmas beneath the Tonga arc: implications for the origin of arc tholeiites | |
| CN101004399A (en) | Method and device for mensurating speed of melting protecting slag | |
| CN216524095U (en) | Thermal state monitoring system for empty ladle and tapping process of steel ladle | |
| Agrawal et al. | A review on liquid level measurement techniques using mathematical models and field sensors in blast furnace | |
| CN103658624A (en) | Method and device for measuring melting loss of gas permeable brick for ladle | |
| CN106679602A (en) | Method and device for determining thickness change of slag crust of copper cooling wall of blast furnace | |
| CN106338458A (en) | High-temperature melt surface tension measuring device and measuring method | |
| CN104894328A (en) | Converter endpoint phosphorus content forecasting method | |
| KR101623420B1 (en) | Porperty measuring device for slag and measuring mtethod of the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |