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Electrode for electric arc furnace steelmaking and spraying method thereof

An electric arc furnace and electrode technology, which is applied in the field of electrodes and electrodes for electric arc furnace steelmaking, can solve the problems of harmful molten steel quality, high investment cost, affecting the operation rate, etc., to avoid mechanical loss, simple processing and manufacturing, and prolong service life Effect

Inactive Publication Date: 2018-05-22
RUI STEEL INDAL OF PANZHIHUA GANGCHENG GROUP
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  • Summary
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AI Technical Summary

Problems solved by technology

In recent years, some manufacturers have used a substance to conduct anti-oxidation coating tests on electrodes, hoping to slow down electrode oxidation and reduce consumption. However, this process is complicated, the investment cost is high, and the surface of the electrode is not smooth, and the contact between the electrode and the conductive copper tile is poor. , easily affected by thermal shutdown
There are also manufacturers that use water spray to cool the electrodes in the smelting process in order to reduce electrode consumption, but the effect of this method is not obvious, and for steel types that are sensitive to gas content, water spray is harmful to the quality of molten steel

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. For the preparation of powder spraying materials, high temperature resistant refractory materials can be used, and a certain proportion of industrial boric acid, namely H3BO3, is used. The content of industrial boric acid in the proportion is usually 7-15%, and the powder is mixed to form a dry powder;

[0020] 2. Powder spraying and canning, put the prepared refractory powder into the tank, and connect the compressed air pipeline, water pipe, rubber hose and steel pipe to the tank;

[0021] 3. Compressed air is used as the power. During the specific operation, the water is passed first, then the air is ventilated, and then the powder valve is opened. After the powder is mixed with water, the power of compressed air is used to mix the refractory material with water into a slurry, and spray it on the Reddened graphite electrode surface in use. Spraying requirements: thin and fast;

[0022] 4. The refractory material sprayed on the electrode surface will protect the g...

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Abstract

The invention discloses an electrode for electric arc furnace steelmaking and a spraying method thereof, which belong to the technical field of metallurgical production equipment accessory maintenanceand repair processes and have the advantages that the service life is longer, and the efficiency of being oxidized during a use process is reduced obviously. The electrode comprises a graphite electrode body and a high-temperature protection layer, wherein the high-temperature protection layer coats the surface of the graphite electrode body. The spraying method uses compressed air as power to online spray pulpy fire-resistant material on the graphite electrode body to acquire the electrode.

Description

technical field [0001] The invention relates to an electrode, in particular to an electrode used for electric arc furnace steelmaking, and belongs to the technical field of repair and maintenance technology for accessories of metallurgical production equipment. The invention also relates to a spraying method for said electrodes. Background technique [0002] Graphite electrodes are generally used for smelting in electric arc furnace steelmaking. During the production process, with the generation of electric arc, the mechanical loss of slag washing and the erosion of high-temperature gas and oxygen in the furnace will cause the outer surface of the electrode to be gradually oxidized and lost. In the consumption of the electrode, the loss of oxidation accounts for about 35-45%. [0003] At present and in the future, our country has extremely high environmental protection requirements for various industries. Many graphite electrode manufacturers have shut down, resulting in a...

Claims

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Application Information

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IPC IPC(8): H05B7/12
CPCH05B7/12
Inventor 周康姚增远张健磊
Owner RUI STEEL INDAL OF PANZHIHUA GANGCHENG GROUP
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