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Dipping type anti-oxidant for improving graphite electrode performance of electric arc steelmaking

A graphite electrode and anti-oxidant technology, applied in electric heating devices, electrical components, heating by discharge, etc., can solve problems such as poor conductivity and water resistance, harsh service conditions, complex production equipment, etc., and achieve good stability and good anti-oxidation performance, improving high temperature oxidation resistance and high temperature flexural strength

Inactive Publication Date: 2007-10-10
王玉凡
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The task of the present invention is to provide a new impregnated antioxidant for improving the high-temperature oxidation resistance and high-temperature flexural strength of graphite electrodes for electric arc steelmaking. The equipment is complicated, the cost is too high, and the use conditions are harsh

Method used

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  • Dipping type anti-oxidant for improving graphite electrode performance of electric arc steelmaking
  • Dipping type anti-oxidant for improving graphite electrode performance of electric arc steelmaking
  • Dipping type anti-oxidant for improving graphite electrode performance of electric arc steelmaking

Examples

Experimental program
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Effect test

Embodiment 1

[0068] Referring to Fig. 3, curve ② is the thermal oxidation curve of the graphite electrode sample impregnated with antioxidant, and the antioxidant component contains 12.1wt% aluminum phosphate, 13wt% silicon dioxide (particle size 0.03~0.05μm), 4.5wt% Aluminum oxide (particle size 0.03-0.05 μm), 0.25 wt% boron trioxide, and 70.15 wt% water. Calculated based on the solid components of the antioxidant, the aluminum phosphate content is 40.5 wt%, the silicon dioxide content is 43.6 wt%, the aluminum oxide content is 15.1 wt%, and the boron trioxide content is 0.8 wt%.

Embodiment 2

[0070] Referring to Fig. 3, the curve ③ is the heating oxidation curve after the graphite electrode sample is impregnated with an antioxidant. Aluminum oxide (particle size 0.03-0.05 μm), 0.5wt% boron trioxide, and 70wt% water. Calculated based on the solid components of the antioxidant, the aluminum phosphate content is 50wt%, the silicon dioxide content is 43.3wt%, the aluminum oxide content is 5wt%, and the boron trioxide content is 1.7wt%.

Embodiment 3

[0072] Referring to Fig. 3, curve ④ is the thermal oxidation curve after the graphite electrode sample is impregnated with antioxidant, and the antioxidant component comprises 15wt% aluminum phosphate, 12.5wt% silicon dioxide (0.03~0.05 μ m in particle size), 1.5wt% Al2O3 (particle size 0.03-0.05μm), 0.5wt% boron trioxide, 0.5wt% titanium dioxide, and 70wt% water. Calculated based on the solid components of antioxidants, the content of aluminum phosphate is 50wt%, the content of silicon dioxide is 41.7wt%, the content of aluminum oxide is 5wt%, the content of diboron trioxide is 1.7wt%, and the content of titanium dioxide is 1.6wt%. .

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Abstract

The invention comprises: solid constituent aluminium phosphate, silicon dioxide, alumina and aqueous solution. The grain size of said solid constituent is 0.01-1 mu m oxide particle stably dispersed in the aqueous solution to form multi phase suspended liquid. Calculated based on the 100% of solid constituent weight, wherein, the aluminium phosphate is 40wt%-64wt%, the silicon dioxide is 30wt%-57wt%; the alumina is 1wt%-6wt%; the heat-resistance of oxidation resistance ceramic film formed using the invention can reach 1400 deg.c The fluid graphite electrode is dipped in the invention, and after drying, an oxidation resistance ceramic film is formed on the graphite electrode.

Description

technical field [0001] The invention relates to a graphite electrode, in particular to an impregnated antioxidant for improving the high-temperature oxidation resistance and high-temperature flexural strength of the graphite electrode for electric arc steelmaking. Background technique [0002] Graphite is the only industrial material suitable for electrodes used in electric arc furnace steelmaking, and its disadvantage is that it has poor oxidation resistance. In electric arc furnace steelmaking, oxidation loss reaches 40% to 70% of the total electrode consumption. 40% to 70% of the graphite electrodes used in electric arc furnace steelmaking are consumed in vain due to the reaction with oxygen in the air. Graphite electrode itself is a high-energy-consuming product. The production of 1 ton of graphite electrode requires more than 4000kwh of electric energy. Reducing the consumption of graphite electrodes can effectively reduce the energy consumption and production cost of ...

Claims

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Application Information

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IPC IPC(8): H05B7/085
Inventor 陶再南王玉凡
Owner 王玉凡
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