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Method and device for determining oxidation burning loss rate of plate blank

A technology for slabs and steel plates, which is applied in the field of determining the oxidation and burning loss rate of slabs, and can solve problems such as large measurement errors

Pending Publication Date: 2021-03-05
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a method and device for determining the oxidation loss rate of the slab, which is used to solve the problem of determining the oxidation loss rate of the short-flow roller hearth heating furnace in the prior art. Technical problems with large measurement errors

Method used

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  • Method and device for determining oxidation burning loss rate of plate blank
  • Method and device for determining oxidation burning loss rate of plate blank

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Experimental program
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Effect test

Embodiment 1

[0038] Here, since the short-flow roller hearth heating furnace is located in the middle of the continuous casting production line, the layout is compact, the continuous casting pendulum shear is only 4m away from the entrance of the road, and there is no space for cold slabs, so it is impossible to use the weighing method to measure the oxidation burning rate. and the temperature of the steel in the furnace is high, because the continuous casting outlet temperature is generally 980 ℃ ~ 1050 ℃, and the oxide scale is continuously generated during the steel loading process, so it is impossible to use the indirect measurement method of the oxide scale to determine the oxidation burning loss rate. Determination.

[0039] Therefore, this embodiment provides a method for determining the oxidation loss rate of slabs, which is applied to short-flow roller hearth heating furnaces in continuous casting production lines, such as figure 1 As shown, the methods include:

[0040] S110, ob...

Embodiment 2

[0063] This embodiment provides a device for determining the oxidation loss rate of slabs, such as figure 2 As shown, the device includes: an acquisition unit 21, a control unit 22 and a determination unit 23;

[0064] The acquisition unit 21 is configured to acquire the first weight of the steel plate to be tested before being put into the furnace; after the steel plate to be tested is released from the furnace, the steel plate to be tested is cooled and pickled, and the weight of the steel plate to be tested is obtained after pickling. second weight;

[0065] The control unit 22 is configured to control the steel plate to be tested to stay on the furnace slab for a preset first time when the steel plate to be tested is placed on the furnace slab so that the initial temperature of the steel plate to be tested is It is consistent with the initial temperature of the slab entering the furnace; the steel plate to be tested is placed in a bracket, and there is a preset distance ...

Embodiment 3

[0086] In practical application, when using the method provided in Example 1 and the device provided in Implementation 2 to measure the oxidation loss rate of the slab, the specific implementation is as follows:

[0087] Take 3 steel plates with a width of 200-250mm, a length of 300-350mm, and a thickness of 1.5-2mm, and 3 stainless steel brackets. Bind to the stainless steel bracket with flammable materials such as plastic rope.

[0088] The tail billet of continuous casting stops after pendulum shearing, and the bound steel plate is placed on the upper surface of the slab. The stainless steel bracket can ensure that the steel plate to be tested is 30mm away from the slab, and after staying for 2 minutes, the continuous casting tail billet is put into the furnace. Set the forward speed of the slab to 3.5 m / min, and the tail billet slowly advances to the traverse section of the continuous casting machine. , After the slab is always in the furnace for 18 minutes, the slab is ...

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Abstract

The invention provides a method for determining the oxidation burning loss rate of a plate blank. The method comprises the steps that: obtaining the first weight of a to-be-measured steel plate beforeentering a furnace; when the to-be-measured steel plate is placed on the in-furnace plate blank, controlling the to-be-measured steel plate to stay on the in-furnace plate blank for a first duration;arranging a to-be-measured steel plate in a bracket, and enabling a distance to exist between the lower surface of the bracket and the upper surface of the plate blank; controlling the to-be-measuredsteel plate to stay in the furnace for a preset second duration, and determining the atmosphere in the furnace based on the process parameters of the in-furnace plate blank; after the to-be-measuredsteel plate is discharged from the furnace, cooling and pickling the to-be-measured steel plate to obtain a second weight of the pickled to-be-measured steel plate; and based on the first weight, thesecond weight and the weight specific surface area of the to-be-measured steel plate, determining the oxidation burning loss rate of the in-furnace plate blank. Therefore, as the to-be-measured steelplate is placed on the bracket, the to-be-measured steel plate can be prevented from contacting with the plate blank, and the oxidation area of the to-be-measured steel plate is ensured; it is ensuredthat the heating time, internal furnace atmosphere and temperature of the to-be-measured steel plate can reach the test standard, and the measurement precision of slab oxidation burning loss is improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical steel rolling, and in particular relates to a method and a device for determining the oxidative burning loss rate of a slab. Background technique [0002] After the high-temperature slab on the continuous casting and rolling production line enters the furnace, oxidation and burning of the high-temperature slab will inevitably occur during the heating process in the heating furnace, resulting in metal loss and directly affecting the production cost of the enterprise. Thermal process technicians have been committed to reducing oxidation burning loss by taking measures such as adjusting the atmosphere in the furnace and optimizing the heating temperature. At the same time, it is necessary to measure the change trend of the oxidation burning loss rate in the furnace, so as to optimize the adjustment measures. [0003] The methods for measuring oxidation burning loss rate in the prior art mainly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04G01N1/42G01N1/28
CPCG01N5/04G01N1/42G01N1/28
Inventor 齐明光李继新石树东王建功宋征张海华马硕张杰王新朋樊星辰刘海云杨达王永和
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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