Method and system for predicting crack in carbon bricks on blast furnace hearth

Abstract

This invention provides a method and system for predicting gaps in carbon bricks in a blast furnace hearth. The method for predicting gaps in carbon bricks in a blast furnace hearth includes: obtaining a first temperature value of a first carbon brick and a second temperature value of a second carbon brick at a first position in a blast furnace hearth; obtaining a third temperature value of a third carbon brick and a fourth temperature value of a fourth carbon brick at a second position in the blast furnace hearth; and comparing the first temperature value, the second temperature value, the third temperature value, and the fourth temperature value to determine the carbon brick with gaps and the length of the gaps.

Claims

1. A method for predicting gaps in carbon bricks on a blast furnace hearth, comprising the following steps: obtaining a first temperature value of a first temperature sensor in a first carbon brick disposed at a first position on a blast furnace hearth and a second temperature value of a second temperature sensor in a second carbon brick disposed on the first carbon brick; obtaining a third temperature value of a third temperature sensor in a third carbon brick disposed at a second position on a blast furnace hearth and a fourth temperature value of a fourth temperature sensor in a fourth carbon brick disposed on the third carbon brick, wherein the first carbon brick and the third carbon brick are located at a first height, and the second carbon brick and the fourth carbon brick are located at a second height; and comparing the first temperature value, the second temperature value, the third temperature value, and the fourth temperature value, comprising: when the second temperature value is greater than the fourth temperature value by 100°C or the first temperature value is greater than the third temperature value by 100°C, then determining that a first gap is formed at the first position; When the second temperature value is greater than the first temperature value by 150°C, it is determined that the first gap is formed in the second carbon brick; and when the first temperature value is greater than the third temperature value by 100°C, it is determined that the first gap extends downward from the second carbon brick to the first carbon brick.

2. The method for predicting gaps in carbon bricks in a blast furnace hearth as described in claim 1, wherein comparing the first temperature value, the second temperature value, the third temperature value, and the fourth temperature value further comprises: when the fourth temperature value is greater than the second temperature value by 100°C or the third temperature value is greater than the first temperature value by 100°C, determining that a second gap is formed at the second location; when the fourth temperature value is greater than the third temperature value by 150°C, determining that the second gap is formed in the fourth carbon brick; and when the third temperature value is greater than the first temperature value by 100°C, determining that the second gap extends downward from the fourth carbon brick to the third carbon brick.

3. The method for predicting gaps in carbon bricks in a blast furnace hearth as described in claim 1 further comprises: obtaining a fifth temperature value from a fifth temperature sensor in a fifth carbon brick located at a third position in the blast furnace hearth and a sixth temperature value from a sixth temperature sensor in a sixth carbon brick, wherein the sixth carbon brick is disposed on the fourth carbon brick, wherein the first carbon brick, the third carbon brick, and the fifth carbon brick are located at the first height, and the second carbon brick, the fourth carbon brick, and the sixth carbon brick are located at the second height; and comparing the third temperature value, the fourth temperature value, the fifth temperature value, and the sixth temperature value, wherein: when the sixth temperature value is greater than the fourth temperature value by 100°C or the fifth temperature value is greater than the third temperature value by 100°C, it is determined that a third gap is formed at the third position; When the sixth temperature value is greater than the fifth temperature value by 150°C, it is determined that the third gap is located in the sixth carbon brick; and when the fifth temperature value is greater than the third temperature value by 100°C, it is determined that the third gap extends downward from the sixth carbon brick to the fifth carbon brick.

4. The method for predicting the gaps in carbon bricks in the blast furnace hearth as described in claim 3, wherein the first position is a first flow channel position, the second position is a hearth wall position, and the third position is a second flow channel position.

5. The method for predicting the gaps in carbon bricks in the blast furnace hearth as described in claim 4 further includes: comparing the second temperature value, the fourth temperature value, and the sixth temperature value, wherein: when the second temperature value is greater than the fourth temperature value, it is determined that the loss of the second carbon brick located at the first flow channel position is greater than the loss of the fourth carbon brick located at the hearth wall position; and when the sixth temperature value is greater than the fourth temperature value, it is determined that the loss of the sixth carbon brick located at the second flow channel position is greater than the loss of the fourth carbon brick located at the hearth wall position.

6. A blast furnace hearth carbon brick gap prediction system, comprising: a temperature sensing module configured to: obtain a first temperature value of a first temperature sensor in a first carbon brick disposed at a first position in a blast furnace hearth and a second temperature value of a second temperature sensor in a second carbon brick disposed on the first carbon brick; and obtain a third temperature value of a third temperature sensor in a third carbon brick disposed at a second position in a blast furnace hearth and a fourth temperature value of a fourth temperature sensor in a fourth carbon brick disposed on the third carbon brick, wherein the first carbon brick and the third carbon brick are located at a first height, and the second carbon brick and the fourth carbon brick are located at a second height; and a processing module electrically connected to the temperature sensing module, the processing module configured to compare the first temperature value, the second temperature value, the third temperature value, and the fourth temperature value, comprising: When the second temperature value is greater than the fourth temperature value by 100°C or the first temperature value is greater than the third temperature value by 100°C, it is determined that a first gap is formed at the first position; when the second temperature value is greater than the first temperature value by 150°C, it is determined that the first gap is formed in the second carbon brick; and when the first temperature value is greater than the third temperature value by 100°C, it is determined that the first gap extends downward from the second carbon brick to the first carbon brick.

7. The blast furnace hearth carbon brick gap prediction system as described in claim 6, wherein the processing module is further configured to: determine that a second gap is formed at the second location when the fourth temperature value is greater than the second temperature value by 100°C or the third temperature value is greater than the first temperature value by 100°C; determine that the second gap is formed in the fourth carbon brick when the fourth temperature value is greater than the third temperature value by 150°C; and determine that the second gap extends downward from the fourth carbon brick to the third carbon brick when the third temperature value is greater than the first temperature value by 100°C.

8. The blast furnace hearth carbon brick gap prediction system as described in claim 6, wherein the temperature sensing module is further configured to: obtain a fifth temperature value of a fifth temperature sensor in a fifth carbon brick disposed at a third position in the blast furnace hearth and a sixth temperature value of a sixth temperature sensor in a sixth carbon brick disposed on the fourth carbon brick, wherein the first carbon brick, the third carbon brick and the fifth carbon brick are located at the first height, and the second carbon brick, the fourth carbon brick and the sixth carbon brick are located at the second height; the processing module is further configured to compare the third temperature value, the fourth temperature value, the fifth temperature value and the sixth temperature value, including: when the sixth temperature value is greater than the fourth temperature value by 100°C or the fifth temperature value is greater than the third temperature value by 100°C, then determining that a third gap is formed at the third position; When the sixth temperature value is greater than the fifth temperature value by 150°C, it is determined that the third gap is located in the sixth carbon brick; and when the fifth temperature value is greater than the third temperature value by 100°C, it is determined that the third gap extends downward from the sixth carbon brick to the fifth carbon brick.

9. The blast furnace hearth carbon brick gap prediction system as described in claim 6, wherein the first position is a first flow channel position, the second position is a hearth wall position, and the third position is a second flow channel position.

10. The blast furnace hearth carbon brick gap prediction system as claimed in claim 9, wherein the processing module is further configured to compare the second temperature value, the fourth temperature value, and the sixth temperature value, comprising: when the second temperature value is greater than the fourth temperature value, determining that the loss of the second carbon brick located at the first flow channel position is greater than that of the fourth carbon brick located at the hearth wall position; and when the sixth temperature value is greater than the fourth temperature value, determining that the loss of the sixth carbon brick located at the second flow channel position is greater than that of the fourth carbon brick located at the hearth wall position.

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