CN112051380A - Method and device for measuring carbon material carburization rate - Google Patents
Method and device for measuring carbon material carburization rate Download PDFInfo
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Abstract
The invention relates to the technical field of ferrous metallurgy, and provides a method and a device for measuring the carburization rate of a carbon material. The method is mainly used for comparing and analyzing the carburizing capability of different carbon materials in molten iron with different components in blast furnace ironmaking production, so that the operation of the blast furnace is correspondingly changed, and the purposes of reducing cost and stabilizing production are achieved.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of ferrous metallurgy, in particular to a method and a device for measuring the carburization rate of a carbon material.
[ background of the invention ]
From the current operation situation of the steel industry, the problems of over supply, insufficient demand, falling of market conditions, fluctuating price, fierce competition, shortage of funds and the like exist, the steel industry enters the micro-profit era undeniably as a whole, and in addition, the national macro regulation and control, tightening policies, difficult financing of steel enterprises and further compression of living space are added, the market pattern of buyers in the steel market cannot be changed, and the supply-demand contradiction is still severe.
In the face of severe market pressure and competitive pressure of the same race, expanding the use range of the solid fuel of the blast furnace and optimizing the fuel structure of the blast furnace are one of the important directions for reducing the cost of molten iron and improving the competitiveness of the ironmaking process. However, the premise of efficient and reasonable use of fuel is to understand the evolution and consumption process of fuel in the blast furnace, so that research and analysis on the dissolution rates of different carbon materials in molten iron are needed at present, so as to further analyze the factors influencing the different dissolution rates of different carbon materials, determine the dissolution mechanism and rule of the carbon materials in the molten iron, and further provide a certain theoretical basis for the optimized selection of the carbon materials.
Accordingly, it is desirable to develop or optimize a method of determining the carburization rate of a carbonaceous material to address the deficiencies of the prior art to address or mitigate one or more of the problems set forth above.
[ summary of the invention ]
In view of the above, the present invention provides a method for laboratory research of carburization rates of different carbon materials, which combines the concept of dissolution of carbon materials into iron alloys, and extracts and quantitatively analyzes the iron liquid in dissolution at specific time points to obtain a carbon content change curve in molten iron and a dissolution rate of carbon materials.
The purpose of the invention is realized by the following technical scheme:
in one aspect, the invention provides a method for determining the carburization rate of a carbon material, comprising:
s10: pretreating a carbon material to obtain a first carbon material;
s20: performing heat treatment on the first carbon material and the iron powder, and presetting a plurality of time periods in the heat treatment process to obtain an iron sample to be detected in the corresponding time periods;
s30: and detecting the iron sample to be detected in the corresponding time period to obtain the carburization rate of the carbon material in the molten iron.
The above aspect and any possible implementation further provides an implementation, wherein the heat treatment comprises: and placing the first carbon material and the iron powder in a high-temperature furnace for experimental treatment, wherein the experimental treatment method comprises a carbon covering method, a carbon blowing method, a rotating cylinder method or a rotating disc method.
The above aspects and any possible implementations further provide an implementation in which the carbonaceous material includes graphite, coal dust, semicoke, or coke.
The above aspect and any possible implementation further provide an implementation in which the carbon material is divided into bulk carbon material or powdered carbon material, and the pre-treatment includes:
treating the blocky carbon material to be cubic or cylindrical, treating the powdery carbon material to be particles with the particle size of less than 1mm, wherein the length of the cube is 20-50mm, the diameter of the cylinder is 10-40mm, and the height of the cylinder is 30-60 mm;
drying the treated blocky carbon material or powdery carbon material to obtain a first blocky carbon material or a first powdery carbon material, wherein the temperature of the drying treatment is 95-120 ℃, and the time of the drying treatment is 1-5 h;
and obtaining the first carbon material according to the first blocky carbon material or the first powdery carbon material.
The above aspect and any possible implementation manner further provide an implementation manner, before the experimental treatment by using the rotating cylinder method or the rotating disc method, the first block-shaped carbon material needs to be subjected to a bonding treatment, wherein the bonding treatment is to bond the block-shaped carbon material and the corundum rod together by using a mixture of a high-temperature bonding agent and fiber powder; the temperature of the bonding treatment is normal temperature, and the time of the bonding treatment is standing for 24 hours to evaporate water.
The above aspects and any possible implementations further provide an implementation in which the first powdered carbon material is added to molten iron using a quartz tube in experimental treatment using the carbon coating method or the carbon blowing method.
As to the above-mentioned aspect and any possible implementation manner, there is further provided an implementation manner, in order to obtain the iron specimen to be measured in the corresponding time period, further including:
putting the crucible containing the iron powder into the high-temperature furnace, heating to 1350-1750 ℃ at the heating rate of 3-5 ℃/min, adding the powdery carbon material or the block carbon material subjected to bonding treatment after 5-15min, and preserving heat for 2-4 hours; introducing inert gas into the high-temperature furnace in the heating process and the experimental process, wherein the flow rate of the inert gas is 4-6L/min; and taking out molten iron in zero to any reaction time period, and cooling to obtain the iron sample to be measured in the corresponding time period.
The above aspect and any possible implementation further provide an implementation in which the iron powder is subjected to a heat treatment with the first carbonaceous material, and an initial content of other elements in the molten iron is controlled by adding the other elements to the iron powder in an amount of 0.5 to 6% by mass, the other elements including graphite, phosphorus, sulfur, manganese, and/or silicon.
The above aspect and any possible implementation further provides an implementation in which the carbon material carburization rate is:
wherein ν is the carburization rate; w is aC0Calculating the carbon content of the starting point of the time period; w is aCfCalculating the carbon content at the end of the time period; t is the reaction time.
In the aspect and any possible implementation manner described above, an implementation manner is further provided, in which after the iron sample to be detected in the corresponding time period is detected, a carbon content change curve in the molten iron is further obtained.
The above aspect and any possible implementation further provides an implementation, an apparatus for determining a carburization rate of a carbonaceous material, including:
a preprocessing module: the method comprises the steps of pretreating a carbon material to obtain a first carbon material;
a heat treatment module: performing heat treatment on the first carbon material and the iron powder, and presetting a plurality of time periods in the heat treatment process to obtain an iron sample to be detected in the corresponding time periods;
a detection module: and detecting the iron sample to be detected in the corresponding time period to obtain the carburization rate of the carbon material in the molten iron.
Compared with the prior art, the invention can obtain the following technical effects:
the method combines the concept of dissolving the carbon material into the iron alloy, extracts and quantitatively analyzes the iron liquid in the dissolving process at a specific time point to obtain a carbon content change curve in the molten iron, so as to compare the dissolving rate of the carbon material, optimizes the previous research on the dissolving of the carbon material, breaks through the limitation that only the starting point and the end point of the dissolving process can be concerned and researched, and has the functions of real-time monitoring and detection in the measuring process; the factors influencing different carbon material dissolution rates are analyzed in a near step, the dissolution mechanism and rule of the carbon material in molten iron are determined, and a certain theoretical basis is provided for the optimized selection of the carbon material; moreover, scientific theoretical basis is provided for optimizing the fuel structure of the blast furnace, reducing the cost of molten iron and improving the iron-making process; by comparing and analyzing the carburizing capability of different carbon materials in molten iron with different components in blast furnace ironmaking in production, the operation of the blast furnace is correspondingly changed, the production cost is reduced, and the production is stabilized.
Of course, it is not necessary for any one product in which the invention is practiced to achieve all of the above-described technical effects simultaneously.
[ 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 flow chart of a method for determining a carburization rate of a carbonaceous material according to an embodiment of the present invention;
FIG. 2 is a schematic flow diagram of a pretreatment in a method for determining a carburization rate of a carbonaceous material according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a carburization rate experimental treatment method in a method for determining a carburization rate of a carbonaceous material according to an embodiment of the present invention;
FIG. 4 is a corundum crucible with an iron-carbon mixture sample and a sample of a carbonaceous material in a method for determining a carburization rate of a carbonaceous material according to an embodiment of the present invention;
FIG. 5 is a schematic view of an experimental BLMT-1700 ℃ high-temperature energy-saving tube furnace in the method for determining the carburization rate of the carbon material according to one embodiment of the invention;
FIG. 6 is a schematic illustration of experimental conditions and procedures in a method for determining a carburization rate of a carbonaceous material according to an embodiment of the present invention;
FIG. 7 is a graph illustrating a variation in carbon content in molten iron in a method for determining a carburization rate of a carbonaceous material according to an embodiment of the present invention;
wherein, in the figure:
1-a carbon material; 2-molten iron; 3-corundum crucible; 4-a rotating electrical machine; 5-corundum rod; 6-quartz tube; 7-a thermocouple; 8-high temperature furnace body; 9-a liquid pumping device; 10-coke; 11-high temperature energy-saving tube furnace.
[ 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.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Example 1:
referring to fig. 1, a flow chart of a method for determining a carburization rate of a carbon material according to an embodiment of the present invention is shown, and the method may include:
step S10: the carbon material is pretreated to obtain a first carbon material.
A carbon material having a uniform composition is preferable. The carbon material can be graphite, coal powder, semicoke or coke, but can also be other conventional carbon materials in the field.
The carbon material may be classified into a bulk carbon material or a powdered carbon material according to the shape or material properties.
To obtain the first carbonaceous material, the initial carbonaceous material is first subjected to a shaping and drying process, which may include the following specific steps, referring to fig. 2:
s101: the blocky carbon material is processed to be cubic or cylindrical, and the powdery carbon material is processed to be particles with the particle size of less than 1 mm.
The length of the cubic carbon material is 20-50mm, preferably 30-40mm, the diameter of the cylindrical carbon material is 10-40mm, the diameter is preferably 15-30mm, the height is 30-60mm, and the height is preferably 40-50 mm; it should be understood that the specific size can be adjusted according to the size, specification, etc. of the instrument and equipment, and is not limited to the above size specification.
S102: and drying the treated blocky carbon material or powdery carbon material to obtain a first blocky carbon material or a first powdery carbon material.
The temperature of the drying treatment is 95-120 ℃, preferably 103-109 ℃, the time of the drying treatment is 1-5h, preferably 2-4h, and the drying treatment equipment can be a drying box.
S103: and obtaining the first carbon material according to the first blocky carbon material or the first powdery carbon material.
It should be understood that the first bulk carbon material is the pretreated bulk carbon material; the first powdery carbon material is the pretreated powdery carbon material; it should also be understood that the first bulk carbon material may be understood as the first carbon material and the first powdered carbon material may also be understood as the first carbon material.
After obtaining the pretreated carbon material, a subsequent heat treatment is required, and referring to fig. 1, the specific steps may include:
s20: and carrying out heat treatment on the first carbon material and the iron powder, and presetting a plurality of time periods in the heat treatment process so as to obtain the iron sample to be measured in the corresponding time periods.
The heat treatment may be understood as experimental treatment of the first carbonaceous material and the iron powder in a high temperature furnace, and as shown in fig. 3, the experimental treatment method may include a carbon coating method, a carbon blowing method, a rotating cylinder method, or a rotating disk method.
Before experimental treatment is carried out by using a rotary cylinder method or a rotary disc method, a first blocky carbon material needs to be subjected to bonding treatment, the bonding treatment is that a blocky carbon material sample is bonded with a corundum rod through a high-temperature bonding agent (the high-temperature bonding agent can resist the high temperature of more than 1700 ℃) mixed with a small amount of fiber powder, and the temperature in the bonding treatment process can be normal temperature and the time is standing for 24 hours to evaporate water.
The high-temperature binder and the fiber powder are conventional articles in the field and can be directly purchased according to experimental requirements.
In the experimental treatment using the carbon coating method or the carbon blowing method, the first powdery carbon material was added to molten iron using a quartz tube.
The initial content of other elements in the molten iron can be controlled by adding other elements to the iron powder before the heat treatment with the first carbon material, the amount of the other elements added is 0.5-6% by mass, preferably 1-5% by mass, and the other elements may include graphite, phosphorus, sulfur, manganese and/or silicon. It should be understood that other elements may not be added to the iron powder; graphite alone, or phosphorus or sulfur alone; the above three or four can also be added; it should also be understood that the other elements added may not be limited to the above elements, but may be any other elements that are conventionally applicable in the art, and are not limited herein.
Specifically, the initial carbon content of the molten iron is controlled by adding graphite powder into the reduced iron powder, and the controllable range is 1-5% by mass ratio.
The experiment is mainly carried out in a high-temperature energy-saving tube furnace with controllable atmosphere and temperature, and the melting temperature of molten iron in the experiment is controlled to be 1350-1750 ℃ and is preferably 1450-1650 ℃.
And (2) putting the corundum crucible containing the iron powder into a high-temperature furnace, starting a temperature rise program of the high-temperature furnace, raising the temperature to a set temperature at a temperature rise rate of 3-5 ℃/min (preferably 5 ℃/min), adding the first powdery carbon material or the first blocky carbon material subjected to bonding treatment after 5-15min (preferably 10min), and preserving the temperature for 2-4 hours (preferably 3 hours). Introducing high-purity argon gas into the high-temperature furnace for protection in the heating process and the experimental process, wherein the gas flow is 4-6L/min (preferably 5L/min), and preventing molten iron and graphite from being oxidized.
It should be understood that the first powdered carbon material is added through a quartz tube after the temperature is raised to 1450-1650 ℃ and the temperature is kept for about 10 min. Similarly, the first blocky carbon material is contacted with molten iron after the temperature is increased to 1450-1650 ℃ and the temperature is kept for about 10min, and then the first blocky carbon material is rotated timely.
The protective gas introduced into the furnace can of course also be another inert gas which meets the experimental conditions. The high-temperature furnace can be at least a high-temperature energy-saving tube furnace.
After reacting for 0min, 0.1min, 1min, 2min, 3min, 4min, 8min, 10min, 20min, 40min, 60min, 80min, 120min, 150min, 210min and 270min … … respectively by using a self-made quartz tube, part of molten iron is extracted from a corundum crucible, and is quickly put into distilled water for cooling, and a solidified iron sample is collected for detection. The time step length of the molten iron extraction can be adjusted according to the actual situation.
Because an important driving force in the process of carburizing the molten iron is the concentration difference between the carbon content in the molten iron and the contact interface of iron and carbon, the carburizing speed of the molten iron is higher at the initial stage of the carburizing process, and the time step length is shorter.
After obtaining the iron sample to be detected at the corresponding time, the extracted molten iron needs to be detected, referring to fig. 1, the specific steps may include:
s30: and detecting the iron sample to be detected in the corresponding time period to obtain the carburization rate of the carbon material in the molten iron.
In the experimental process, high-temperature molten iron is extracted by using quartz tubes according to different time nodes, rapidly cooled and then sent to a detection center for carbon content detection, and the reaction rate is calculated according to time.
In order to clarify the influence of molten iron with different components on the action of the first blocky carbon material, the diameters (or other equivalent lengths) before and after the reaction can be measured, and the changes of the volume and the appearance can be checked.
It should be understood that the powdered carbon material is limited by the volume, and the powdered carbon material cannot be separately sampled for morphology observation after the experiment is finished, so that the change of the carbon content in the molten iron is mainly researched.
The carbon material carburizing rate is as follows:
wherein ν is a carburizing rate, and the unit is wt%/min, wherein wt% is mass percent; w is aC0For calculating the carbon content at the starting point of the time period, the unit is wt%; w is aCfFor calculating the end point carbon content of the time period, the unit is wt%(ii) a t is the reaction time in min.
After the iron sample to be detected in the corresponding time period is detected, the change curve of the carbon content in the molten iron can be obtained through summarizing and calculating.
Placing carbon materials into the melted high-temperature molten iron in different modes, and extracting the high-temperature molten iron by using a quartz tube through the volume and appearance change of the carbon materials to monitor the carbon content change in the molten iron so as to obtain the carburizing rate of different carbon materials in the molten iron; the type of the carbon material and the composition of the molten iron can be changed in the process. The embodiment can be used for carrying out comparative analysis on the carburizing capacity of different carbon materials in molten iron with different components in blast furnace ironmaking.
Example 2:
as shown in fig. 3, the present embodiment provides an apparatus and a method for testing the reaction and wetting behavior of iron alloy on the surface of a carbon material, wherein a rotating cylinder experimental method is specifically adopted, and the apparatus and the method comprise the following steps:
(1) reduced iron powder with a certain initial carbon content is prepared, a block-shaped carbon material 1 (the carbon material in the embodiment is coke) sample to be measured is cut into a cylindrical sample, and the cylindrical sample is fixed on a corundum rod 5 by using a high-temperature adhesive mixed with a small amount of fiber powder.
Specifically, 392g of reduced iron powder was weighed and placed in a corundum crucible 3, 8g of graphite 10 was added to the reduced iron powder to prepare an iron-carbon mixed sample having a carbon content of 2 wt%, and the iron powder and graphite 10 were gently stirred to be uniformly mixed, as shown in fig. 4a, and a coke as a research object was selected, and the size was 18mm × 50mm, as shown in fig. 4 b.
(2) The main atmosphere in the experiment is carried out in a controllable high-temperature energy-saving tube furnace.
Specifically, the corundum crucible 3 filled with iron powder and graphite is placed into a high-temperature energy-saving tube furnace 11, as shown in fig. 3 and 5, a temperature rise program of the high-temperature furnace is started, the temperature is raised to a set temperature at a temperature rise rate of 5 ℃/min, the corundum rod bonded with coke is added after 10min, and the temperature is kept for 3 h. High-purity argon is introduced into the high-temperature energy-saving tube furnace for protection in the heating process and the experimental process, the gas flow is 5L/min, and molten iron and graphite are prevented from being oxidized. The rotating motor 4 drives the corundum rod 5 to rotate and stir; thermocouple 7 detects temperature conditions.
(3) In the heat preservation period of 3 hours, after reacting for 2min, 4min, 8min, 10min, 20min, 40min, 60min, 80min, 120min and 160min respectively by using a self-made quartz tube, part of molten iron is pumped out of the crucible by using a liquid pumping device 9 and is rapidly put into distilled water for cooling, and a solidified iron sample is collected for detection, as shown in fig. 6.
(4) The change in carbon content obtained after the measurement was plotted against the change in time to obtain a carburization change chart, as shown in fig. 7. Meanwhile, the dissolution rate can be calculated according to the carbon content at different time points.
It is also an object of the embodiments of the present invention to provide a device for measuring a carburization rate of a carbon material, and for convenience of explanation, only the portions related to the embodiments of the present application are shown.
The device for measuring the carburization rate of the carbon material comprises a pretreatment module, a heat treatment module and a detection module. The pretreatment module is used for pretreating the carbon material to obtain a first carbon material; the heat treatment module is used for presetting a plurality of time periods in the heat treatment process when the first carbon material and the iron powder are subjected to heat treatment so as to obtain an iron sample to be detected in the corresponding time period; and the detection module is used for detecting the iron sample to be detected in the corresponding time period so as to obtain the carburization rate of the carbon material in the molten iron.
Compared with the prior art, the invention can obtain the following technical effects:
the method combines the concept of dissolving the carbon material into the iron alloy, extracts and quantitatively analyzes the iron liquid in the dissolving process at a specific time point to obtain a carbon content change curve in the molten iron, so as to compare the dissolving rate of the carbon material, optimizes the previous research on the dissolving of the carbon material, breaks through the limitation that only the starting point and the end point of the dissolving process can be concerned and researched, and has the functions of real-time monitoring and detection in the measuring process; the factors influencing different carbon material dissolution rates are analyzed in a near step, the dissolution mechanism and rule of the carbon material in molten iron are determined, and a certain theoretical basis is provided for the optimized selection of the carbon material; moreover, scientific theoretical basis is provided for optimizing the fuel structure of the blast furnace, reducing the cost of molten iron and improving the iron-making process; by comparing and analyzing the carburizing capability of different carbon materials in molten iron with different components in blast furnace ironmaking in production, the operation of the blast furnace is correspondingly changed, the production cost is reduced, and the production is stabilized.
The method, apparatus, or system provided by the embodiments of the present application is described in detail above. The above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
It should be understood that the above-mentioned English words and/or letters and/or symbols are only used for clearly explaining the specific parameters of the method or device and/or the specific meanings of the parameters, and other English words, letters or symbols can also be used for representation, and are not limited herein.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
As used in the specification and claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
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 foregoing description shows and describes several preferred embodiments of the application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (10)
1. A method for determining the carburization rate of a carbonaceous material, comprising:
s10: pretreating a carbon material to obtain a first carbon material;
s20: performing heat treatment on the first carbon material and the iron powder, and presetting a plurality of time periods in the heat treatment process to obtain an iron sample to be detected in the corresponding time periods;
s30: and detecting the iron sample to be detected in the corresponding time period to obtain the carburization rate of the carbon material in the molten iron.
2. The method of determining the carburization rate of a carbon material as recited in claim 1, wherein said heat treating comprises: and placing the first carbon material and the iron powder in a high-temperature furnace for experimental treatment, wherein the experimental treatment method comprises a carbon covering method, a carbon blowing method, a rotating cylinder method or a rotating disc method.
3. The method of determining the carburization rate of a carbonaceous material according to claim 2, wherein said carbonaceous material comprises graphite, coal dust, semicoke, or coke.
4. The method for determining the carburization rate of a carbon material according to claim 3, wherein said carbon material is classified into a bulk carbon material or a powdered carbon material, and said pretreatment comprises:
treating the blocky carbon material to be cubic or cylindrical, treating the powdery carbon material to be particles with the particle size of less than 1mm, wherein the length of the cube is 20-50mm, the diameter of the cylinder is 10-40mm, and the height of the cylinder is 30-60 mm;
drying the treated blocky carbon material or powdery carbon material to obtain a first blocky carbon material or a first powdery carbon material, wherein the temperature of the drying treatment is 95-120 ℃, and the time of the drying treatment is 1-5 h;
and obtaining the first carbon material according to the first blocky carbon material or the first powdery carbon material.
5. The method for determining the carburizing rate of the carbon material according to claim 4, wherein the first lump carbon material is subjected to a bonding treatment by using a mixture of a high-temperature binder and fiber powder to bond the lump carbon material and a corundum rod before the experimental treatment by using the rotating cylinder method or the rotating disc method; the temperature of the bonding treatment is normal temperature, and the time of the bonding treatment is 24 hours of standing.
6. The method for determining the carburizing rate of the carbon material according to claim 4, wherein the first powdery carbon material is added to the molten iron using a quartz tube in the experimental treatment using the carbon coating method or the carbon blowing method.
7. The method for determining the carburizing rate of the carbon material according to any one of claims 5 and 6, further comprising, for obtaining the iron sample to be measured for the corresponding period of time:
putting the crucible containing the iron powder into the high-temperature furnace, heating to 1350-1750 ℃ at the heating rate of 3-5 ℃/min, adding the first powdery carbon material or the first blocky carbon material subjected to bonding treatment after 5-15min, and preserving heat for 2-4 hours; introducing inert gas into the high-temperature furnace in the heating process and the experimental process, wherein the flow rate of the inert gas is 4-6L/min; and taking out molten iron in zero to any reaction time period, and cooling to obtain the iron sample to be measured in the corresponding time period.
8. The method of determining a carburization rate of a carbonaceous material according to claim 7, wherein said iron powder is subjected to a heat treatment with said first carbonaceous material, and wherein an initial content of other elements in molten iron is controlled by adding said other elements to said iron powder in an amount of 0.5 to 6% by mass, said other elements including graphite, phosphorus, sulfur, manganese and/or silicon.
9. The method for determining the carburization rate of a carbonaceous material according to claim 8, wherein said carburization rate of a carbonaceous material is:
wherein ν is the carburization rate; w is aC0Calculating the carbon content of the starting point of the time period; w is aCfCalculating the carbon content at the end of the time period; t is the reaction time;
and detecting the iron sample to be detected in the corresponding time period to obtain a carbon content change curve in the molten iron.
10. An apparatus for determining the carburization rate of a carbonaceous material, comprising the method for determining the carburization rate of a carbonaceous material according to any one of claims 1 to 9, said apparatus comprising:
a preprocessing module: the method comprises the steps of pretreating a carbon material to obtain a first carbon material;
a heat treatment module: performing heat treatment on the first carbon material and the iron powder, and presetting a plurality of time periods in the heat treatment process to obtain an iron sample to be detected in the corresponding time periods;
a detection module: and detecting the iron sample to be detected in the corresponding time period to obtain the carburization rate of the carbon material in the molten iron.
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