Online ladle safety residual thickness marking method and corresponding ladle

A technology of ladle and steel shell, applied in the online ladle safety residual thickness marking method and the corresponding ladle field, can solve the problem of difficulty in online measurement of ladle safety residual thickness, avoid major safety accidents, reduce misjudgment, and save refractory material consumption Effect

Active Publication Date: 2017-01-11
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem existing in the prior art that it is difficult to measure the safety residual thickness of the steel ladle online, the purpose of the present invention is to provide an online ladle safety residual thickness marking method and the corresponding steel ladle

Method used

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  • Online ladle safety residual thickness marking method and corresponding ladle
  • Online ladle safety residual thickness marking method and corresponding ladle
  • Online ladle safety residual thickness marking method and corresponding ladle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Make alabaster bricks containing 2% barium oxide with a thickness of 40mm, and at the same time thin the refractory material of the permanent layer of the entire ladle by 40mm, complete the masonry construction of the ladle, and put it on-line for use. In use, each furnace detects the content of barium in molten steel and slag samples, and compares it with the background statistical data to obtain Figure 5 The monitoring data graph of the marked elements is shown, if the content of the marked elements increases abnormally, the ladle will be taken off-line for repair.

[0037] Figure 5 The basic curve shows that the barium element fluctuates between 1-6ppm. In the 85th furnace, the barium element in the molten steel suddenly rises to 23ppm. The ladle is immediately checked off the production line, and abnormal erosion is found at the slag line, and the part is repaired immediately.

Embodiment 2

[0039] Clay bricks containing 5% barium oxide are made with a thickness of 20mm. At the same time, the refractory material of the permanent layer of the entire ladle is thinned by 20mm, and the ladle masonry construction is completed and put into use. In use, each furnace detects the content of barium in molten steel and slag samples, and compares it with the background statistical data to obtain Image 6The monitoring data graph of the marked elements is shown, if the content of the marked elements increases abnormally, the ladle will be taken off-line for repair.

[0040] Image 6 The basic curve shows that the barium element fluctuates between 2 and 10ppm. In the 75th furnace, the barium element in the molten steel suddenly rises to 27ppm. The ladle is immediately checked off the assembly line and found to be abnormally eroded in the impact zone at the bottom, and the part is repaired immediately.

Embodiment 3

[0042] Make alabaster bricks containing 3.5% barium oxide with a thickness of 30mm, and at the same time thin the refractory material of the permanent layer of the entire ladle by 35mm, complete the masonry construction of the ladle, and put it into use. In use, each furnace detects the content of barium in molten steel and slag samples, and compares it with the background statistical data to obtain Figure 7 The monitoring data graph of the marked elements is shown, if the content of the marked elements increases abnormally, the ladle will be taken off-line for repair.

[0043] Figure 7 The basic curve shows that the barium element fluctuates between 3 and 9ppm. In the 90th furnace, the barium element in the molten steel suddenly rises to 29ppm. The ladle is immediately checked off the production line, and the slag line under the cladding wall is found to be abnormally eroded, and the part is repaired immediately.

[0044] To sum up, the present invention can effectively mo...

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Abstract

The invention discloses a ladle. The ladle comprises the following layers from outside to inside: a steel shell, a permanent layer, an insulation layer, a marking refractory layer and a working layer; and the marking refractory layer contains a marking element fused in molten steel. The invention further discloses an online ladle safety residual thickness marking method; and the method comprises the following steps: (1) the ladle with the marking refractory layer is manufactured; the ladle comprises the steel shell, the permanent layer, the insulation layer, the marking refractory layer and the working layer from outside to inside; and the marking refractory layer contains the marking element fused in the molten steel; (2) the content of the marking element is analyzed; and (3) the abnormal increment of the content of the marking element is judged to determine maintenance of the ladle. The method can effectively monitor the safety state of the ladle working layer in holding of the molten steel, gives ahead prewarning for steel leakage of the ladle to prevent major safety accidents, and meanwhile, can reduce wrong judgments caused by different experiences and ladle lining specific environments to save the consumed material consumption and to reduce the production cost.

Description

technical field [0001] The invention relates to a steelmaking safety device and method, more specifically, to an online ladle safety residual thickness marking method and a corresponding steel ladle. Background technique [0002] Ladle refractories for steelmaking are mainly composed of steel shell 1, permanent layer and insulation layer 2, working layer 4 and some functional components, such as figure 1 Shown is a structural diagram of refractory materials in a typical molten steel tank. Wherein the working layer 4 can be built with amorphous castable castables or refractory bricks. During the use of the ladle, through high-temperature chemical erosion and mechanical erosion of molten steel, the refractory material of the working layer 4 is continuously eroded, and the residual thickness (residual thickness) is continuously reduced. When the residual thickness of the refractory material in the working layer 4 is reduced to a certain extent, it cannot be used online for sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/00B22D41/02G01B5/06B22D2/00
Inventor 甘菲芳王爱明逯若东苏海波
Owner BAOSHAN IRON & STEEL CO LTD
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