CN115235944A - Large-capacity iron ladle iron slag measuring tool and measuring method thereof - Google Patents
Large-capacity iron ladle iron slag measuring tool and measuring method thereof Download PDFInfo
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- CN115235944A CN115235944A CN202210695799.5A CN202210695799A CN115235944A CN 115235944 A CN115235944 A CN 115235944A CN 202210695799 A CN202210695799 A CN 202210695799A CN 115235944 A CN115235944 A CN 115235944A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4673—Measuring and sampling devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
- G01B5/066—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness of coating
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Abstract
The invention discloses a large-capacity iron-clad iron slag measuring tool and a measuring method thereof, wherein the large-capacity iron-clad iron slag measuring tool comprises a hand grab handle, a slag measuring rod, a balance rod and a slag layer display rod which are sequentially connected; according to the invention, through a large iron ladle test with the molten iron charging capacity of 110t, a specific tool for measuring the thickness of the slag layer is adopted, and the weight method for measuring the thickness of the slag layer instead of the traditional slag skimming method is realized. Compared with the traditional measuring method: the slag measuring time is shortened by more than or equal to 10 min/time, the slag weight result reporting time is shortened by more than 6 h/time, the data accuracy is more than 98%, the operation efficiency is improved by more than 99%/time, the slag measuring process time is greatly shortened, the labor intensity is reduced, the method plays a very important role in reducing the high-temperature heat radiation safety risk of the high-capacity iron-clad molten iron, and meanwhile, the scientific and simple subway slag measuring method also provides good data support for iron ore smelting iron slag control, iron slag analysis and molten iron purity evaluation.
Description
Technical Field
The invention belongs to the technical field of iron and steel smelting iron slag measurement, and relates to a large-capacity iron-clad iron slag measuring tool and a measuring method thereof.
Background
With the development of national economy, the steel is the first country for producing steel, and according to the requirements of green, environmental protection and clean energy of the country, the steel is produced by turning traditional crude steel into high-end steel such as high-standard bearings, high-grade railways, ships, aviation and the like. High-end type steel requires pure molten iron quality and molten steel quality. Iron ore metallurgy experiences complex physical and chemical changes, the molten iron is influenced by a slag former and the like, the molten iron inevitably has an iron slag phenomenon, and as the molten iron slag is low-alkalinity high-sulfur slag, various indexes such as revolving furnace slag material addition, smelting process control, end point alkalinity R and S content, steel raw material consumption and the like have great influence, how to quickly detect the iron slag content in large-scale production is particularly necessary for timely providing data for iron-making iron slag control, and a large-capacity iron-coated iron slag measuring method is not reported at present.
At present, many steel mills are researching how to control the high-efficiency conversion of iron ore into molten iron, control of molten iron components and the like, the research has long working period and low efficacy, and much iron slag controls the quality of the molten steel by a slag skimming mode or a slag pouring mode directly at the last stage of smelting in a converter. The method for measuring the iron slag of the high-capacity iron ladle has not been reported, and the published patent method for measuring the iron slag has low slag measurement precision and is not universal in actual operation and is limited by a plurality of limitations. CN110887762A discloses a method for determining the mass fraction of metallic iron in a slag sample. The mass fraction of iron in the slag sample is determined by reasonably taking the slag sample, but the patent aims at cold slag samples and analyzing the iron content, and the analysis of the iron content is carried out according to published national standards, and the slag sample condition in the large-scale production process is not explained. CN201720402U discloses a device for measuring thickness of slag at top of a steel ladle, which adopts a reasonable measuring tool design, and measures thickness of slag-sticking slag by measuring that a slag wire penetrates into molten steel, and the slag wire is fused by contacting with the molten steel, so as to obtain thickness of a slag layer. CN206695722U discloses a tool for measuring molten iron slag content, reduces the manual operation difficulty through reasonable slag measuring tool design, but the patent does not clearly give a reading method for measuring the slag layer thickness of an iron ladle.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the existing technical problems in the prior art, the invention provides a large-capacity iron ladle iron slag measuring tool and a measuring method thereof, and the method successfully solves the technical problems that the heat radiation of 110t large-capacity iron ladle iron liquid is large, the personnel slag skimming operation difficulty is large, the iron slag measuring efficiency is low, the operation risk is large, the data feedback is not timely, the data reading is not accurate, and the like.
The technical scheme is as follows: in order to achieve the purpose, the high-capacity iron ladle iron slag measuring tool comprises a hand grab handle, a slag measuring rod, a balance rod and a slag layer display rod which are sequentially connected; the slag layer display rod is made of HRB400 deformed steel bar with the diameter phi of 10-14mm and the length of 80-100cm, and the end part of the HRB400 deformed steel bar is cut into a cone with the angle of 50-70 degrees.
Wherein, the diameter of the slag layer display rod is too large, which easily causes the weight increase of the slag layer display rod, the manual operation difficulty is large, the diameter is too small, which easily causes the melting of the slag layer display rod, so the diameter is determined to be phi 10-14mm. The slag layer display rod has too large and blunt end, is not easy to be inserted into the iron slag, and has too small angle, which results in insufficient strength of the end and bending of the inserted iron slag, and affects the measurement result, so the angle is determined to be 50-70 degrees. Meanwhile, the length is too long, manual movement is laborious, the length is too short, and the iron ladle iron slag is difficult to insert, so that the length is 80-100cm, and the optimal specific value can be 90cm.
Preferably, the slag layer display rod is constructed by a conical tool with a diameter phi of 12mm, a length of 90cm, and HRB400 screw steel and an end part with an angle of 60 degrees.
The handle is a sector handle made of 45# steel, and is convenient to hold and not easy to fall off.
The slag measuring rod is made of a high-temperature-resistant steel pipe, the transverse length is controlled to be 2-3m, and the vertical length is controlled to be 1-2m, so that the slag measuring rod is convenient to take up.
The balance bar is made of HRB400 deformed steel bars and welded into an isosceles triangle, so that the slag display bar can be fixed conveniently and the end line of the inserted iron ladle can be distinguished conveniently.
Preferably, the slag layer display rod is made of HRB400 deformed steel bar, considering that the HRB400 deformed steel bar has excellent sensitivity to temperature, the molten iron temperature is high, the iron slag temperature is low, so that the deformed steel bar has obvious temperature difference color, namely, the color is bright red yellow near the molten iron part, and is black near the iron slag, so that the iron slag boundary can be easily judged. Because the slag is harder, the end part of the slag layer display rod is cut into a 60-degree conical shape, so that the iron ladle can be conveniently inserted to resist high temperature, and the boundary of molten iron and slag is clearly displayed.
The invention discloses a method for measuring high-capacity iron ladle iron slag, which comprises the following steps:
(1) Selecting an iron ladle: 110t large-capacity iron ladle with regular cylindrical shape;
(2) A slag measuring step: vertically placing a slag measuring tool into an iron ladle filled with molten iron, taking out the slag measuring tool, quickly finding out a boundary line between the molten iron and the iron slag, quickly measuring the thickness of a slag layer by using a steel ruler, recording the thickness data of the slag layer, and substituting the data into a formula to calculate the weight of the slag; because the temperature of the molten iron is high and the temperature of the iron slag is low, the part of the slag layer display rod, which is in contact with the molten iron, is red, the part of the slag layer display rod, which is in contact with the slag, is black, and the obvious color difference is the boundary line between the molten iron and the iron slag.
(3) And (3) comparing data: and (4) slagging off the iron ladle with the measured slag, weighing the iron ladle with excessive weight after the iron slag is cooled, and comparing the weight difference between the measured slag and the slagging off. Meanwhile, the situation of shortening the slag measuring time, the situation of shortening the reporting time of the slag weight result, the situation of data accuracy and the situation of improving the operating efficiency are used as reference surfaces through verification.
Wherein, in order to ensure the consistency of the density of the iron slag, the selection of the molten iron in the iron ladle in the step (1) can not cover: a skimmer and scrap steel are placed.
And (3) vertically putting the slag measuring tool in the step (2) into an iron ladle filled with molten iron for 10-15s, and taking out the slag measuring tool. As the temperature of the molten iron in the iron ladle is about 1500 ℃, the time for placing the iron ladle is too long, the slag layer display rod is molten, the placing time is too short, and the boundary of the slag layer in the slag layer display rod is displayed in a fuzzy and unclear manner, the time for placing the iron ladle containing the molten iron is determined to be 10-15s, and the optimal time is 12s.
Wherein, in the step (2), the thickness of the slag layer is measured quickly by a steel ruler within 5 s. The method avoids the problems that the slag layer display rod takes too long time, the boundary is fuzzy, the slag layer thickness measurement is influenced, the time is controlled, and the measurement result is accurately judged.
The design principle is as follows: the invention considers the measuring method of the large-capacity iron ladle iron slag, not only analyzes the measuring method of the iron ladle iron slag, but also analyzes the reading method of the thickness of the iron slag layer. The method is simple and convenient to operate, the reading is scientific and effective, and the accuracy of the slag measurement data is verified through slag skimming and weight measurement. The invention designs a high-capacity iron ladle iron slag measuring method aiming at comparing a high-capacity iron ladle iron slag measuring method with the traditional slag skimming slag weight measuring method. The covering shape of the slag is a disk or a flattened cylinder, the thickness of a slag layer is equal to the bottom area of the slag = the volume of the slag, the volume of the slag is equal to the density of the slag = the weight of the slag, and the slag weight is measured conventionally, the slag in an iron ladle is removed into a slag basin by a slag removing tool, and then the slag weight is weighed in pounds. According to the invention, a large iron ladle with the molten iron capacity of 110t is selected, and a tool for measuring the thickness of the slag layer is adopted, wherein the tool is made of HRB400 deformed steel with the diameter of 12mm and the length of 80-100cm, and the end part of the tool is cut into a conical shape with the angle of 60 degrees, so that the weight method for measuring the slag layer thickness instead of the traditional slag skimming method is realized. The actual level reaches: the slag measuring time is shortened by more than or equal to 10 min/time, the reporting time of the slag weight result is shortened by more than 6 h/time, the data accuracy is more than 98 percent, and the operation efficiency is improved by more than 99 percent/time.
According to the invention, through a plurality of tests, the density of the slag in the iron slag is determined, and according to a formula: the weight = volume x density, the volume = bottom area x height, the iron ladle is a cylinder, the iron slag is distributed on the upper layer, the formed flattened cylinder is a flattened cylinder, the height is the depth of the iron slag, namely the volume can be calculated by measuring the depth, so that the weight of the slag is obtained, and the result is equal to the weight chance of the slag after slag skimming, thereby demonstrating the feasibility of the method, and replacing the traditional slag skimming method with high labor intensity, large risk and large investment.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) The slag measuring tool is easy to manufacture, the slag measuring process can be operated by one person, the labor intensity is reduced, and the working efficiency is improved;
(2) Compared with the traditional operation method, the slag measuring time is shortened by more than or equal to 10 min/time, the reporting time of the slag weight result is shortened by more than 6 h/time, the data accuracy is more than 98 percent, and the operation efficiency is improved by more than 99 percent/time;
(3) The method successfully solves the technical problems that the heat radiation of 110t large-capacity iron ladle molten iron is large, the slag skimming operation difficulty of personnel is large, the iron slag measurement efficiency is low, the operation risk is large, the data feedback is not timely, the data reading is not accurate, and the like. The method greatly shortens the slag measuring process time, reduces the labor intensity, plays a very important role in reducing the high-temperature heat radiation safety risk of the high-capacity iron ladle molten iron, and simultaneously provides a good data support for iron ore smelting iron slag control, iron slag analysis and molten iron purity evaluation by a scientific and simple subway slag measuring method.
Drawings
FIG. 1 is a schematic view of a simple slag measuring tool manufactured by the method;
fig. 2 is a graph of actual slag layer thickness readings.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
Manufacturing a slag measuring tool: comprises a hand grab handle 1, a slag measuring rod 2, a balance rod 3 and a slag layer display rod 4 in sequence, and are connected by welding. Wherein the slag layer display rod is a conical tool which is made of HRB400 deformed steel with the diameter phi of 12mm and the length of 90cm and the end part of which is cut into an angle of 60 degrees; the grab handle 1 adopts a fan-shaped grab handle and is made of 45# steel; the slag measuring rod 2 is made of a high-temperature resistant steel pipe, and has a transverse length of 2.5m and a vertical length of 1.5m; the balance bar 3 is welded into an isosceles triangle by adopting HRB400 deformed steel bar.
The slag measuring tool is shown in figure 1.
The slag measuring tool is adopted in the subsequent embodiments.
Example 2
(1) Selection of the iron ladle: 110t large capacity iron ladle, regular cylindrical, in order to guarantee the consistency of iron slag density, the molten iron selection in the iron ladle can not cover: a slag skimmer and waste steel are placed;
(3) A slag measuring step: the slag measuring tool (embodiment 1) is vertically placed into an iron ladle containing molten iron for 12s, the slag measuring tool is taken out, a boundary line between the molten iron and the iron slag is quickly found out, the thickness of a slag layer is quickly measured by a steel ruler within 5s, and fig. 2 is a photograph of the data of the thickness of the slag layer measured in test example 3, the data of the thickness of the slag layer is recorded, and the data is substituted into a formula to calculate the weight of the slag, wherein the formula is as follows: weight = volume x density, volume = base area x height, the ladle is a cylinder, the diameter of the cylinder is known, the base area is the area of a circle, the base area is obtained from the inner diameter of the ladle.
(4) And (3) comparing data: and (4) slagging off the iron ladle with the measured slag, weighing the iron ladle in a weighing way after the iron ladle is cooled, and comparing the weight difference between the measured slag and the slagging-off slag. The slag removing process is a conventional process, and is to remove slag in the iron ladle into an empty slag basin through a slag removing tool and weigh the slag in pounds.
Test example 1
Measuring the large-capacity iron ladles of different batches by adopting the measuring method of the embodiment 2, and comparing and slagging off; the ratio of time for slagging-off and measuring the thickness of the slag layer by the method of the invention is shown in the following table 1; the ratio of the weight of the slag removed and the weight of the slag measured by the method of the invention is shown in Table 2; the time ratio of slag skimming and the weight measurement of the slag by the method of the present invention is shown in Table 3.
TABLE 1
TABLE 2
TABLE 3
Note: the slag measuring time is shortened by = slag removing time-slag measuring time; slag layer volume =3.14 × (ladle inner diameter/2) × (slag layer thickness); the iron slag density and the ladle inside diameter are the inherent metallurgical data of the steel mill (the size of the ladle depends on the actual inside diameter purchased,the volume of the slag layer is calculated through the inner diameter of the iron ladle and the thickness of the slag layer, the iron slag density is inherent data obtained by multiple measurements of a steel mill, and is 2.35t/m 3 . ) (ii) a Theoretical weight of iron slag = slag layer volume × iron slag density; the data accuracy is% = the theoretical weight of the iron slag is multiplied by 100/the slag weighing weight after slag skimming; the theoretical weight calculation time of the iron slag = a design form, and the volume of a slag layer, the thickness of the slag layer and the density data of the iron slag are input into the total time; the slag weighing time after slag pulling = the slag cooling time after slag skimming plus the slag weighing time; the slag weight result reporting time is shortened, namely, the slag weight weighing time after slag skimming-the iron slag theoretical weight calculating time; the operation efficiency is improved by% = the reported time of the slag weight is shortened by 100/the slag weight weighing time after slag skimming.
As can be seen from the above tables 1 to 3, when the tool for measuring the thickness of the slag layer designed by the invention is used for measuring the large-capacity iron-clad iron slag, compared with the traditional method for measuring the iron-clad iron slag by slagging-off, the tool has obvious effects of improving the safety and the work efficiency of operators, and the related indexes are improved, and the actual level thereof reaches: the slag measuring time is shortened by more than or equal to 10 min/time, the reporting time of the slag weight result is shortened by more than 6 h/time, the data accuracy is more than 98 percent, and the operation efficiency is improved by more than 99 percent/time; the index data obtained by the method of the invention fully indicates that the detection method has very high reliability and replaces the traditional method, and provides data support for the previous process to obtain the iron slag data and improve the iron slag control.
Claims (8)
1. A large-capacity iron ladle iron slag measuring tool is characterized by comprising a hand grab handle (1), a slag measuring rod (2), a balance rod (3) and a slag layer display rod (4) which are connected in sequence; the slag layer display rod (4) is made of HRB400 deformed steel with the diameter phi of 10-14mm and the length of 80-100cm, and the end part of the HRB400 deformed steel is cut into a cone with the angle of 50-70 degrees.
2. The large-capacity iron-clad slag measuring tool according to claim 1, wherein the hand-holding handle (1) is a fan-shaped hand-holding handle made of 45# steel.
3. The large-capacity iron ladle slag measuring tool according to claim 1, wherein the slag measuring rod (2) is made of a high-temperature-resistant steel pipe, and is made of 45# steel, and has a transverse length of 2-3m and a vertical length of 1-2m.
4. The high-capacity iron ladle slag measuring tool according to claim 1, wherein the balance bar (3) is welded into an isosceles triangle by adopting HRB400 deformed steel.
5. A method for measuring high-capacity iron ladle iron slag is characterized by comprising the following steps:
(1) Selecting an iron ladle: 110t large-capacity iron ladle with regular cylinder shape;
(2) A slag measuring step: vertically placing the slag measuring tool of claim 1 into a ladle containing molten iron, taking out the slag measuring tool, quickly finding a boundary between the molten iron and the iron slag, quickly measuring the thickness of a slag layer by using a steel ruler, recording the thickness data of the slag layer, and substituting the data into a formula to calculate the weight of the slag;
(3) And (3) comparing data: and (4) slagging off the iron ladle with the measured slag, weighing the iron ladle with excessive weight after the iron slag is cooled, and comparing the weight difference between the measured slag and the slagging off.
6. A large capacity ladle slag measurement method according to claim 5, characterized in that the selection of the molten iron in the ladle in step (1) cannot cover: a skimmer and scrap steel are placed.
7. A large capacity ladle slag measuring method according to claim 5, characterized in that in the step (2), the slag measuring tool is preferably vertically put into the ladle containing molten iron for 10-15s, and the slag measuring tool is taken out.
8. A large-capacity iron ladle iron slag measuring method according to claim 5, wherein the thickness of the slag layer is measured by a steel ruler within 5s in step (2).
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| CN202210695799.5A CN115235944A (en) | 2022-06-17 | 2022-06-17 | Large-capacity iron ladle iron slag measuring tool and measuring method thereof |
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| CN202210695799.5A CN115235944A (en) | 2022-06-17 | 2022-06-17 | Large-capacity iron ladle iron slag measuring tool and measuring method thereof |
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