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Production method capable of prolonging service life of lining of electric furnace for casting

A production method and electric furnace technology, applied in the direction of electric furnace, process efficiency improvement, furnace, etc., can solve the problems of affecting casting cost, inconsistent product weight, low output, etc., and achieve improved service life, good practical effect, and simple operation Effect

Inactive Publication Date: 2016-03-02
YIYANG SANDS HEAVY MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with iron and steel, casting production has a lower output, and the electric furnace used is on and off, and the weight of the products is not uniform, which easily causes the life of the electric furnace lining to be low. The service life of the furnace lining is of great significance to metallurgical and foundry enterprises that require continuous large-scale production. Since the furnace age is a comprehensive indicator, the furnace age directly affects the increase in steel output and raw material consumption. Therefore, increasing the electric furnace Lining life, reducing the consumption of refractory materials, and increasing the life of electric furnaces have aroused widespread concern

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A production method for improving the service life of an electric furnace lining for casting, comprising the following steps:

[0013] (1) Fresh slag

[0014] Before tapping the electric furnace, add lime to the electric furnace to make slag. The amount of lime added is controlled at 6 kg / ton, the temperature in the electric furnace is controlled above 1650 ° C, and the basicity of the slag is controlled at about 3.5;

[0015] (2) Slag surface purging

[0016] The furnace door oxygen lance is used to purge the slag surface, so that the new slag is evenly hung on the inner surface of the furnace wall, and the oxygen pressure is controlled at 1.2MPa during the purge, thereby protecting the lining of the electric casting furnace.

Embodiment 2

[0018] A production method for improving the service life of an electric furnace lining for casting, comprising the following steps:

[0019] (1) Fresh slag

[0020] Before tapping the electric furnace, add lime to the electric furnace to make slag. The amount of lime added is controlled at 10 kg / ton, the temperature in the electric furnace is controlled above 1650 ° C, and the basicity of the slag is controlled at about 5;

[0021] (2) Slag surface purging

[0022] Use the furnace door oxygen lance to purge the slag surface, so that the newly created slag hangs evenly on the inner surface of the furnace wall, and the oxygen pressure is controlled at 1.6MPa during the purge, thus protecting the lining of the electric casting furnace.

Embodiment 3

[0024] A production method for improving the service life of an electric furnace lining for casting, comprising the following steps:

[0025] (1) Fresh slag

[0026] Before tapping the electric furnace, add lime into the electric furnace to make slag, the amount of lime added is controlled at 8 kg / ton, the temperature in the electric furnace is controlled above 1650 °C, and the basicity of the slag is controlled at about 4;

[0027] (2) Slag surface purging

[0028] The furnace door oxygen lance is used to purge the slag surface, so that the new slag is evenly hung on the inner surface of the furnace wall, and the oxygen pressure is controlled at 1.4MPa during the purge, thereby protecting the lining of the electric furnace for foundry.

[0029] Using the above method, the newly made slag is evenly hung on the inner surface of the furnace wall, thereby protecting the lining of the electric furnace for foundry, and can effectively improve the service life of the electric furna...

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PUM

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Abstract

The invention relates to a production method capable of prolonging the service life of a lining of an electric furnace for casting. The production method comprises the following steps that (1) new furnace slag is formed, lime is added into the electric furnace before steel is discharged out of the electric furnace for slag formation, the adding amount of the lime is controlled to be 6-10 kilograms per ton, the temperature in the electric furnace is controlled to be over 1650 DEG C, and the alkalinity of the furnace slag is controlled to be 3.5-5; and (2) a slag surface is swept, sweeping is conducted on the slag surface by means of a furnace door oxygen gun so that the formed new slag can be evenly hung on the inner surface of the furnace wall, and the pressure of oxygen during sweeping is controlled to be 1.2-1.6 MPa, so that the function of protecting the lining of the electric furnace for casting is achieved. The production method has the advantages that operation is simple, and the practical effect is good; the service life of the lining of the electric furnace for casting can be effectively prolonged to reach over 70 times, and the service life of the lining of the electric furnace for casting is twice that of a lining of an existing electric furnace.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a production method for improving the service life of an electric furnace lining for casting. Background technique [0002] National in 2010 casting The total output is 39.6 million tons. During the ten years from 2001 to 2010, the average annual growth rate of the national casting output is 11%. National in 2011 casting The total output is 41.5 million tons. In 2012, the national total output of castings was 42.5 million tons. In 2013, the national total output of castings was 44.5 million tons. In 2014, the national casting Total production was 46.2 million tons; an increase of 4.8% in 2011, 2.4% in 2012, 4.7% in 2013 and 3.8% in 2014. Compared with iron and steel, casting production has a lower output, and the electric furnace used is on and off, and the weight of the products is not uniform, which easily causes the life of the electric furnace lining to be low. The servic...

Claims

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Application Information

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IPC IPC(8): C21C5/52F27D1/10
CPCY02P10/20
Inventor 贺云丁长江周垂良
Owner YIYANG SANDS HEAVY MACHINERY MFG
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