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A control method for the narrow side taper of the electric crystallizer width adjustment device
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A control method and crystallizer technology, applied in the field of continuous casting in the metallurgical industry, can solve problems such as breakouts, deviations in measuring taper, accidents, etc.
Active Publication Date: 2020-05-22
CHINA NAT HEAVY MACHINERY RES INSTCO
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Abstract
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Problems solved by technology
There is a deviation in the measurement of the taper after each pouring. When the deviation is serious, an accident will occur and the steel will break out.
Method used
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Embodiment 1
[0035] Such as figure 2 As shown, the narrow side taper control method of the mold electric width adjustment device provided by the present invention is mainly used for the taper control after the heat ratio width adjustment process of the mold of black and non-ferrous metal slab continuous casting machines or after multiple furnaces.
[0036] It includes the following steps:
[0037] Step 100: Establish the heat flux ratio process database of the copper plate with wide and narrow sides of the crystallizer, and store the standard range value of the heat flux ratio of the copper plate with wide and narrow sides of the crystallizer in the process database;
[0038] Step 200: Calculation and monitoring, calculating and monitoring the real-time heat flux ratio of the copper plates with wide and narrow sides of the crystallizer;
[0039] Step 300: comparison and adjustment, comparing the real-time crystallizer width and narrow side copper plate heat flux ratio with the standard r...
Embodiment 2
[0041]On the basis of Example 1, the specific steps for establishing the heat flux ratio process database of the copper plate with wide and narrow sides of the crystallizer are as follows: collecting the cooling water flow rate of the wide side of the crystallizer, the flow rate of the cooling water at the wide side of the crystallizer, Cooling water flow, water temperature at the wide and narrow side of the crystallizer, and water outlet temperature at the wide and narrow side of the mold; calculate and store the heat flux ratio of the copper plate at the wide and narrow side of the mold according to the collected data; measure the narrow side taper of the mold after pouring, if the narrow side taper If the deviation is within the range of plus or minus 0.5mm, the heat flux ratio of the copper plate with wide and narrow sides of the mold is determined to be the standard range value, and the standard range value is stored in the heat flux ratio process database of the copper pla...
Embodiment 3
[0044] On the basis of embodiment 2, calculate crystallizer width and narrow side copper plate heat flux ratio K by following formula (1) 1 :
[0045] K 1 = Φ 宽1 / Φ 窄1
[0046] In formula (1), K 1 -The heat flux ratio of the copper plate with wide and narrow sides of the crystallizer; Φ 宽1 -Heat flux at broadside; Φ 窄1 -Heat flux of the narrow side, respectively calculate the heat flux of the wide side Φ 宽1 and narrow side heat flux Φ 窄1 , and finally calculate the ratio K of the two 1 , that is, the heat flux ratio of the copper plate with the wide and narrow sides of the crystallizer.
[0047] Among them, Φ 宽1 and Φ 窄1 Calculated according to the following formula (2) of heat flux;
[0048]
[0049] In formula (2)
[0050] Φ-heat flux, Φ 宽1 -Heat flux at broadside, Φ 窄1 - narrow side heat flux;
[0051] c-specific heat of water, the value is 4178J / kg·℃;
[0052] Q 1 - Cooling water flow rate, unit is L / s, calculate broadside heat flux Φ 宽1 , brought int...
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Abstract
The invention belongs to the field of continuous casting in metallurgical industry, and particularly relates to a narrow side taper control method for an electric width adjustment device of a crystallizer. The control method includes a step 100 of establishing a process database of a heat flux density ratio of a copper plate of a wide side to a copper plate of a narrow side of the crystallizer, wherein a standard range value of the heat flux density ratio of the copper plate of the wide side to the copper plate of the narrow side of the crystallizer is stored in the process database of the heat flux density ratio of the copper plate of the wide side to the copper plate of the narrow side of the crystallizer; a step 200 of conducting calculation and monitoring, wherein calculation and monitoring are conducted on the heat flux density ratio of the copper plate of the wide side to the copper plate of the narrow side of the crystallizer in real time; and a step 300 of conducting comparisonand adjustment, wherein the real-time heat flux density ratio of the copper plate of the wide side to the copper plate of the narrow side of the crystallizer is compared with the standard range value, if the real-time heat flux density ratio of the copper plate of the wide side to the copper plate of the narrow side of the crystallizer exceeds the standard range value, the taper of the narrow side of the crystallizer is adjusted, so that the heat flux density ratio of the copper plate of the wide side to the copper plate of the narrow side of the crystallizer returns to the standard range value. According to the control method, the taper of the narrow side of the crystallizer can be accurately controlled without adding hardware.
Description
technical field [0001] The invention belongs to the field of continuous casting in the metallurgical industry, and in particular relates to a method for controlling the narrow side taper of an electric crystallizer width adjustment device. Background technique [0002] The crystallizer is the most critical equipment in the continuous casting machine. It is a metallurgical reactor that cools molten steel into a fixed size and has a certain shell thickness. The width adjustment device is used to adjust the width and taper of the narrow sides on both sides of the crystallizer, which is to meet the switching of different slab width specifications during the continuous casting process of the continuous casting machine. It is realized by moving the upper and lower screw rods 3 on both sides of the crystallizer. as follows figure 1 As shown, the transmission device uses four sets of AC servo motors and reducer 2 to push the screw rod 3 respectively, so that the two narrow sides o...
Claims
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Application Information
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