Airtight electrode paste and manufacturing method thereof

A technology for electrode paste and electric calcined anthracite, which is applied in the fields of carbon materials and non-metallic materials of metallurgical engineering, can solve the problems of unstable product quality, poor thermal shock resistance and high raw material cost, and achieve stable product quality and thermal shock resistance. Excellent performance and the effect of improving thermal shock resistance

Inactive Publication Date: 2014-05-14
MINHE GUANGDA CARBON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional closed electrode paste has the disadvantages of high raw material cost, low formula precision

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Sealed electrode paste, raw material ratio is 75% (weight percent) of carbon aggregate, 25% (weight percent) of organic binder; Natural earthy graphite, in which the content of electric calcined anthracite accounts for 20% (weight percent) of the total carbon aggregate, the content of calcined petroleum coke accounts for 15% (weight percent) of the total carbon aggregate, and the content of pitch coke accounts for 15% (weight percent) of the total carbon aggregate. 20% (percentage by weight) of the total aggregate, 30% (percentage by weight) of the total amount of carbon aggregate, the content of artificial graphite is 7% (percentage by weight) of the total amount of carbon aggregate, natural soil The content of graphite is 8% (weight percent) of the total amount of carbon aggregate; the organic binder is composed of medium-temperature pitch and anthracene oil, and the content of medium-temperature pitch is 90% (weight percent) of the total amount of organic binder. ), ...

Embodiment 2

[0033] Sealed electrode paste, the raw material ratio is 80% (weight percent) of carbon aggregate, 20% (weight percent) of organic binder; carbon aggregate includes electric calcined anthracite, calcined petroleum coke, pitch coke, anode butt, artificial graphite, Natural earthy graphite, in which the content of electric calcined anthracite accounts for 30% (weight percent) of the total carbon aggregate, the content of calcined petroleum coke accounts for 20% (weight percent) of the total carbon aggregate, and the content of pitch coke accounts for 20% (weight percent) of the total carbon aggregate. 15% (percentage by weight) of the total amount of aggregate, 20% (percentage by weight) of the total amount of carbon aggregate, the content of artificial graphite is 8% (percentage by weight) of the total amount of carbon aggregate, natural soil The content of graphite is 7% (weight percent) of the total amount of carbon aggregate; the organic binder is composed of medium-temperatu...

Embodiment 3

[0038] The manufacture method of airtight electrode paste, comprises the following steps:

[0039] A. Carry out crushing, screening, grinding and batching of carbon aggregate according to the determined raw material ratio and particle size distribution;

[0040] B. Add the prepared carbon aggregate into the kneading pot for dry mixing, so that the temperature of the carbon aggregate reaches 90°C;

[0041] C. Heat the medium-temperature asphalt to 160-170°C to melt it, and then add it to the kneading pot for wet mixing with carbon aggregate, and continue heating to raise the temperature to 140-150°C. Continue wet mixing for 30-40 minutes;

[0042] D. Heat the anthracene oil to 80-90°C and add it into the kneading pot, and continue kneading for 15 minutes to get out of the pot;

[0043] E. The paste after being out of the pot is drawn and formed on the paste machine while it is hot, and the commercial airtight electrode paste is made.

[0044] The raw materials used in the ab...

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PUM

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Abstract

The invention relates to the field of non-metallic materials for metallurgical engineering, in particular to airtight electrode paste used for a large-scale submerged arc furnace and a manufacturing method of the airtight electrode paste. The airtight electrode paste uses carbon raw materials as aggregate, uses organic compounds as binding agents, and is manufactured through the working procedures of smashing, screening, powder grinding, material mixing, melting of the binding agents, dry mixing, wet mixing, past pulling formation and the like. The airtight electrode paste and the manufacturing method of the airtight electrode paste have the advantages that when the airtight electrode paste is used on the submerged arc furnace, electrode breaking accidents do not happen easily, the manufactured airtight electrode paste is manufactured by recycling waste materials and lowers production cost, the strength of the electrode paste is improved, the specific resistance of the electrode paste is lowered, and the thermal shock resistance when the electrode paste is sintered into a self-baking electrode is improved. Through the process method of the airtight electrode paste, particle classification levels are increased, material distribution is more reasonable and more stable through detailed classification, the temperature of each working procedure point is strictly controlled, and anthracene oil is heated so that the quality of products can keep stable.

Description

technical field [0001] The invention relates to the field of metallurgical engineering non-metallic materials, in particular to the field of carbon materials. Specifically, it relates to a closed electrode paste for large submerged arc furnaces and a method for manufacturing the closed electrode paste. Background technique [0002] Submerged arc furnace, also known as electric heating furnace or resistance electric furnace, is mainly used in the metallurgical and chemical industries to smelt and produce ferroalloys such as ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, silicon-manganese alloys, and chemical raw materials such as calcium carbide and phosphorus. Its working feature is to use carbon or magnesia refractory materials as the furnace lining, use self-baking electrodes, and insert the self-baking electrodes into the furnace charge for submerged arc operation. The smelting operation is an industrial electric furnace that continuously feeds materials, inter...

Claims

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Application Information

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IPC IPC(8): H05B7/09C04B35/532C04B35/622
Inventor 冉万强何世荣马历乔
Owner MINHE GUANGDA CARBON
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