Method for determining distribution rate of titanium element in slag iron in blast furnace ironmaking process

Abstract

The invention relates to a method for determining the distribution rate of titanium elements in slag iron in the blast furnace ironmaking process. The method comprises the steps that the distribution law of titanium in the slag iron is calculated according to the corresponding titanium dioxide content in molten iron and the titanium dioxide content in slag; according to the silicon content in the molten iron and the basicity of the slag, the molten iron of different iron times is sorted, and titanium distribution law data corresponding to the silicon content and the basicity of the slag in a preset range are screened out; and drawing a box plot according to the titanium distribution law data, judging whether the titanium distribution law data is abnormal or not according to the drawn box plot, and when the titanium distribution law data is abnormal, adjusting the proportion of the titanium content in the slag iron. The titanium distribution rate obtained by testing related components in the molten iron and the slag not only can reduce the adverse effect of titanium on the ironmaking process, so that the quality of the molten iron is more stable, but also can improve the resource utilization rate, reduce the discharge of the titanium-containing slag and reduce the influence on the environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blast furnace ironmaking, in particular to a method for determining the distribution rate of titanium in slag and iron in the process of blast furnace ironmaking. BACKGROUND

[0002] With the development of modern industry, the quality and performance requirements of steel products are increasingly improved. Many special steel grades, such as high-strength alloy steel, stainless steel, heat-resistant steel, oriented silicon steel, and non-oriented silicon steel, need to strictly control the content of impurity elements in steel to ensure good strength, toughness, corrosion resistance, and other properties. As a common alloying element, the distribution rule of titanium in slag and iron in the ironmaking process directly affects the composition and quality of molten iron, and further affects the subsequent steelmaking production and the performance of steel products. Therefore, in order to meet the production needs of high-end steel products, it is crucial to accurately grasp the distribution rule of titanium in slag and iron. SUMMARY

[0003] To solve the above problems, the purpose of the embodiment of the present application is to provide a method for determining the distribution rate of titanium in slag and iron in the process of blast furnace ironmaking.

[0004] A method for determining the distribution rate of titanium in slag and iron in the process of blast furnace ironmaking, comprising:

[0005] Step 1: test the corresponding silicon, titanium content, slag basicity, and titanium dioxide content in the slag of different iron heats to obtain test results;

[0006] Step 2: determine the corresponding titanium dioxide content in the molten iron according to the corresponding titanium content in the molten iron;

[0007] Step 3: calculate the distribution law of titanium in slag and iron according to the corresponding titanium dioxide content in the molten iron and the titanium dioxide content in the slag;

[0008] Step 4: sort the molten iron of different iron heats according to the silicon content in the molten iron and the slag basicity, and select the titanium distribution law data corresponding to the silicon content and the slag basicity within the preset range;

[0009] Step 5: draw a box plot according to the titanium distribution law data, and determine whether the titanium distribution law data is abnormal according to the drawn box plot, and adjust the proportion of titanium content in slag and iron when the titanium distribution law data is abnormal.

[0010] Preferably, in the step 3, the distribution law of titanium in slag and iron is calculated by the formula:

[0011] Titanium distribution law = titanium dioxide content in slag / titanium dioxide content in molten iron.

[0012] Preferably, in step 4, the titration data of titanium is obtained, wherein the slag basicity is 1.1-1.5, and the silicon content is 0.3-0.6.

[0013] Preferably, in step 5, the titration data of titanium is sorted from small to large, and the lower quartile and the upper quartile are calculated; the upper limit and the lower limit are determined according to the lower quartile and the upper quartile, and when the titration data point is less than the lower limit or greater than the upper limit, it is regarded as an abnormal value.

[0014] Preferably, in the step 5, the lower quartile calculation formula is:

[0015] Q1=(n+1) / 4

[0016] Wherein, n is the number of titration data of titanium, when Q1 is an integer, the sorting value corresponding to Q1 is the lower quartile; when Q1 is not an integer, then Q1 is rounded up and rounded down, and the average value of the sorting values corresponding to the two positions after rounding is taken as the lower quartile.

[0017] The calculation formula of the upper quartile is:

[0018] Q3=3*(n+1) / 4

[0019] Wherein, when Q3 is an integer, the sorting value corresponding to Q3 is the upper quartile; when Q3 is not an integer, then Q3 is rounded up and rounded down, and the average value of the sorting values corresponding to the two positions after rounding is taken as the upper quartile.

[0020] Preferably, in the step 5, the lower limit is: Q1-1.5*IQR; the upper limit is: Q3+1.5*IQR, wherein IQR=Q3-Q1.

[0021] The application further provides an electronic device, comprising a bus, a transceiver, a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the transceiver, the memory and the processor are connected through the bus, and the computer program is executed by the processor to realize the steps of the method for determining the distribution rate of titanium in slag and iron in a blast furnace ironmaking process.

[0022] The application further provides a computer readable storage medium, wherein a computer program is stored in the computer readable storage medium, and the computer program is executed by a processor to realize the steps of the method for determining the distribution rate of titanium in slag and iron in a blast furnace ironmaking process.

[0023] According to the embodiments of the application, the following technical effects are achieved:

[0024] The present application relates to a kind of determination method of distribution rate of titanium element in slag iron in blast furnace iron-making process, compared with prior art, the titanium distribution rate obtained by assaying relevant components (Si, Ti, TiO2, basicity etc.) in molten iron, slag can not only reduce the adverse effects of titanium on iron-making process, make molten iron quality more stable, but also can improve resource utilization, reduce the discharge of titanium-containing slag, reduce the influence on environment.

[0025] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0027] Figure 1 A flow chart of the determination method of distribution rate of titanium element in slag iron in blast furnace iron-making process provided by the present application is provided.

[0028] Figure 2 The box plot provided by the present application is provided. DETAILED DESCRIPTION

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0030] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0031] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] Please refer to Figure 1 A method for determining the distribution rate of titanium element in slag and iron in a blast furnace ironmaking process, comprising:

[0033] Step 1: test the corresponding silicon, titanium content, slag basicity and titanium dioxide content in the slag in the molten iron of different iron times to obtain the test results;

[0034] Step 2: determining the corresponding titanium dioxide content in the molten iron according to the corresponding titanium content in the molten iron;

[0035] Step 3: calculating the distribution law of titanium in slag and iron according to the corresponding titanium dioxide content in the molten iron and the titanium dioxide content in the slag;

[0036] In step 3, the distribution law of titanium (Ti) in slag and iron is defined as: the TiO2 content in the slag / the corresponding TiO2 content in the molten iron.

[0037] Step 4: sorting the molten iron of different iron times according to the silicon content in the molten iron and the slag basicity respectively, and screening out the titanium distribution law data corresponding to the silicon content and the slag basicity within the preset range;

[0038] Step 5: drawing a box plot according to the titanium distribution law data, and judging whether the titanium distribution law data is abnormal according to the box plot drawn, and adjusting the proportion of titanium content in slag and iron when the titanium distribution law data is abnormal.

[0039] In step 5, the box plot is used to judge the abnormality, and the principle is: sort the data from small to large:

[0040] Calculate the position of the lower quartile (Q1): use the formula Q1=(n+1) / 4, where n is the number of data. If the result is an integer, Q1 is the data value at that position; if the result is not an integer, round up and round down, and Q1 is the average of the data values at the two positions.

[0041] Calculate the position of the upper quartile (Q3): use the formula Q3 position=3*(n+1) / 4. Similarly, if the result is an integer, Q3 is the data value at that position; if the result is not an integer, round up and round down, and Q3 is the average of the data values at the two positions.

[0042] Calculate the interquartile range (IQR): IQR = Q3 - Q1.

[0043] Determine the upper and lower limits:

[0044] Set the lower limit to Q1 - 1.5 x IQR.

[0045] Set the upper limit to Q3 + 1.5 x IQR.

[0046] Determine outliers

[0047] Data points are considered outliers if they are less than the lower limit or greater than the upper limit.

[0048] 5、If there are no outliers in the distribution rate, the average distribution rate under the conditions of operating basicity and hot metal Si can be used. If there are outliers, the median can be used. The median is the value in the middle of a set of data arranged in order of size. If the number of data is odd, the median is the middle number. If the number of data is even, the median is the average of the two middle numbers.

[0049] The determination method of the distribution rate of titanium in slag and iron in the blast furnace ironmaking process of the present application will be further described in combination with specific application scenarios:

[0050] 1、The hot metal Si and Ti content corresponding to the iron and the corresponding slag basicity (R) and slag TiO2 content are tested as shown in Table 1:

[0051] Table 1

[0052]

[0053]

[0054] 2、The Ti content in the hot metal is converted into TiO2 according to the atomic weight, as shown in Table 2.

[0055] Table 2

[0056]

[0057]

[0058] 3、The distribution law of titanium (Ti) in slag and iron is defined as the TiO2 content in slag / the corresponding TiO2 content in hot metal, as shown in Table 3.

[0059] Table 3

[0060]

[0061]

[0062] 4, the slag basicity, molten iron Si data are layered, form the cross region, to meet the cross region slag basicity requirement, molten iron Si requirement distribution law data statistics. With basicity R control in 1.1-1.5, Si control in 0.3-0.6 between the corresponding Ti distribution rate average is 13, as shown in table 4.

[0063] Table 4

[0064]

[0065] 5, the target distribution rate sample set whether there is abnormal data judgment. From the basicity R control in 1.1-1.5, si control in 0.3-0.6 between the Ti distribution law data has 127, to the 127 data sample statistics, as shown in table 5.

[0066] Table 5

[0067]

[0068] 6, the 127 data determined in step 5 are made into box line chart to determine whether there is abnormal value. From Figure 2 It can be seen. There is an abnormal high value, so the mean value cannot be used, that is, 13 in step 5.

[0069] 7, because the mean value is affected by the abnormal value, so the final distribution rate needs to use the median value, the median value is calculated: the final Ti distribution law uses 12.194.

[0070] After adopting the above measures, the accurate determination of Ti distribution rate can be realized, and the control of the titanium load into the furnace is well prepared. During the smelting of non-oriented silicon steel in the downstream process, the molten iron Ti content is reduced by about 25%, and the low titanium iron concentrate resources are greatly saved under the premise of meeting the steelmaking demand.

[0071] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of the changes or replacement technical solutions within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for determining the distribution rate of titanium element in slag and iron during blast furnace ironmaking, characterized in that, include: Step 1: Test the silicon and titanium content, slag basicity, and titanium dioxide content in the slag of molten iron of different grades to obtain the test results; Step 2: Determine the titanium dioxide content in the molten iron based on the corresponding titanium content. Step 3: Calculate the distribution law of titanium in slag-iron based on the titanium dioxide content in molten iron and slag; Step 4: Sort the molten iron of different grades according to the silicon content and slag basicity, and select the titanium distribution law data corresponding to the silicon content and slag basicity within the preset range. Step 5: Draw a box plot based on the titanium distribution law data, and determine whether the titanium distribution law data is abnormal based on the drawn box plot. If the titanium distribution law data is abnormal, adjust the proportion of titanium content in the slag iron.

2. The method for determining the distribution rate of titanium element in slag and iron during blast furnace ironmaking according to claim 1, characterized in that, In step 3, the formula for calculating the distribution law of titanium in slag-iron is: Titanium distribution law = titanium dioxide content in slag / titanium dioxide content in molten iron.

3. The method for determining the distribution rate of titanium element in slag and iron during blast furnace ironmaking according to claim 1, characterized in that, In step 4, titanium partition law data with slag basicity of 1.1-1.5 and silicon content of 0.3-0.6 are obtained.

4. The method for determining the distribution rate of titanium element in slag and iron during blast furnace ironmaking according to claim 1, characterized in that, In step 5, the titanium distribution law data are sorted from smallest to largest and the lower quartile and upper quartile are calculated. The upper and lower limits are determined based on the lower and upper quartiles. When a titanium distribution law data point is less than the lower limit or greater than the upper limit, it is considered an outlier.

5. The method for determining the distribution rate of titanium element in slag and iron during blast furnace ironmaking according to claim 4, characterized in that, In step 5, the formula for calculating the lower quartile is: Q1 = (n+1) / 4 Where n is the number of data points in the titanium distribution law. When Q1 is an integer, the sort value corresponding to Q1 is the lower quartile. When Q1 is not an integer, Q1 is rounded up and down, and the average of the sort values ​​corresponding to the two rounded positions is taken as the lower quartile. The formula for calculating the upper quartile is: Q3 = 3*(n+1) / 4; When Q3 is an integer, the sort value corresponding to Q3 is the upper quartile; when Q3 is not an integer, Q3 is rounded up and down, and the average of the sort values ​​corresponding to the two rounded positions is taken as the upper quartile.

6. The method for determining the distribution rate of titanium element in slag and iron during blast furnace ironmaking according to claim 4, characterized in that, In step 5, the lower limit is Q1 - 1.5 × IQR; the upper limit is Q3 + 1.5 × IQR, where IQR = Q3 - Q1.

7. An electronic device comprising a bus, a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the transceiver, the memory, and the processor are connected via the bus, characterized in that, When the computer program is executed by the processor, it implements the steps in the method for determining the distribution rate of titanium element in slag and iron during blast furnace ironmaking as described in any one of claims 1-6.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps in the method for determining the distribution rate of titanium element in slag and iron during blast furnace ironmaking as described in any one of claims 1-6.

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