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High-strength high-graphite carbon electrode and preparation method thereof

A high-graphite, carbon electrode technology, applied in the field of carbon electrodes, can solve the problems of reducing the resistance of carbon electrodes, easy to break, low strength, etc., and achieve the effects of reducing production costs, improving density, and high thermal conductivity.

Inactive Publication Date: 2011-06-22
JIZHOU CHANGAN ELECTRODE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low resistance and low strength of crushed graphite, this method reduces the resistance of the carbon electrode and also reduces the strength of the carbon electrode. The carbon electrode with high graphite content is prone to breakage during use, which is harmful to submerged arc furnaces. Great impact on smelting production

Method used

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  • High-strength high-graphite carbon electrode and preparation method thereof
  • High-strength high-graphite carbon electrode and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first step: medium crushing, sieving, grinding

[0033] Crushing and screening the calcined solid raw material electric calcined coal, crushing and screening part of the petroleum coke and graphite, and grinding the part;

[0034] Step 2: Ingredients and Dry Blending

[0035] Use the electronic batching system to weigh out 30 parts by weight of crushed graphite, 30 parts by weight of petroleum coke, and 15 parts by weight of electric calcined coal. After batching, enter the kneading pot, and simultaneously add 0.2 parts by weight of yttrium oxide to the kneading pot, stir and dry mix for 20 minute;

[0036] Step Three: Knead

[0037] The temperature is 180°C, 15 parts by weight of coal tar pitch is injected into the kneading pot, and the stirring is continued. After kneading for 40 minutes, the temperature rises to 160°C and the paste comes out of the pot;

[0038] Step 4: Shaping

[0039] The paste out of the pot enters the mold on the vibration molding machine...

Embodiment 2

[0045] The first step: medium crushing, sieving, grinding

[0046] Crushing and screening the calcined solid raw material electric calcined coal, crushing and screening part of the petroleum coke and graphite, and grinding the part;

[0047] Step 2: Ingredients and Dry Blending

[0048] Use the electronic batching system to weigh out 35 parts by weight of crushed graphite, 35 parts by weight of petroleum coke, and 20 parts by weight of electric calcined coal. After batching, enter the kneading pot, and add 0.3 parts of yttrium oxide to the kneading pot at the same time, stir and dry mix for 23 minutes;

[0049] Step Three: Knead

[0050] The temperature is 185°C, 20 parts by weight of coal tar pitch is injected into the kneading pot, and the stirring is continued. After 42 minutes of kneading, the temperature rises to 165°C and the paste comes out of the pot;

[0051] Step 4: Shaping

[0052] The paste out of the pot enters the mold on the vibration molding machine. After 9...

Embodiment 3

[0058] The first step: medium crushing, sieving, grinding

[0059] Crushing and screening the calcined solid raw material electric calcined coal, crushing and screening part of the petroleum coke and graphite, and grinding the part;

[0060]Step 2: Ingredients and Dry Blending

[0061] Use the electronic batching system to weigh out 40 parts by weight of crushed graphite, 40 parts by weight of petroleum coke, and 25 parts by weight of electric calcined coal. After batching, enter the kneading pot, and simultaneously add 0.5 parts by weight of yttrium oxide to the kneading pot, stir and dry mix for 25 minute;

[0062] Step Three: Knead

[0063] The temperature is 190°C, 30 parts by weight of coal tar pitch is injected into the kneading pot, and the stirring is continued. After 45 minutes of kneading, the temperature rises to 170°C and the paste comes out of the pot;

[0064] Step 4: Shaping

[0065] The paste out of the pot enters the mold on the vibration molding machine. ...

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Abstract

The invention discloses a high-strength high-graphite carbon electrode and a preparation method thereof, belonging to the technical field of carbon electrodes. The high-strength high-graphite carbon electrode is technically characterized by comprising the following materials in parts by weight: 30-40 parts of graphite scraps, 30-40 parts of petroleum coke, 15-25 parts of electrically calcined coal, 15-30 parts of pitches and 0.2-1.0 part of yttrium oxide, wherein the yttrium oxide is added to the asphalts. The preparation method comprises the following steps of: screening a calcined solid rawmaterial, i.e. the electrically calcined coal, the petroleum coke and the graphite scraps through an oscillating screen; batching through an electric batching system, placing into a mixing kneading pot, and adding a processed additive, i.e. the yttrium oxide, for stirring and dry mixing; and then adding coal pitches. Because the yttrium oxide plays roles of polymerization and reinforcement, various materials are more compactly combined together so that the density of the carbon electrode can be enhanced, and the carbon electrode achieves high strength, low resistance and higher heat-conduction property, therefore the problem of incapability of coexistence of two advantages of low resistance and high strength is solved; and in addition, the invention meets the requirements on a large-size mine heat smelting furnace in smelting industry.

Description

technical field [0001] The invention belongs to the technical field of carbon electrodes, in particular to a high-strength and high-graphitic carbon electrode and a preparation method thereof. Background technique [0002] Carbon electrodes are widely used in industrial silicon, yellow phosphorus, calcium carbide, ferroalloy and other smelting submerged arc furnaces. In industrial silicon submerged arc furnaces, carbon electrodes are used to replace higher-priced graphite electrodes. In submerged arc submerged arc furnaces with the same capacity, the diameter of carbon electrodes is larger than that of graphite electrodes, the arc belt in the furnace is widened, and the arc body is stable, ensuring Higher furnace efficiency, lower product consumption, lower production costs. Carbon electrodes can replace electrode paste in calcium carbide, ferroalloy and other smelting submerged arc furnaces. On submerged arc submerged arc furnaces with the same capacity, it can increase th...

Claims

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Application Information

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IPC IPC(8): C01B31/00C01B31/02
Inventor 王广西高世友张玉珠李兰静李长福王秋生张学标
Owner JIZHOU CHANGAN ELECTRODE