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A method for placing electrodes under an electric calciner

An electric calciner and electrode technology, applied in the petroleum industry, solid fuel, fuel and other directions, to achieve the effect of reducing energy consumption, saving energy consumption and reducing production costs

Active Publication Date: 2018-05-25
宁夏宁平炭素有限责任公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a new method of lowering the electrodes to improve production efficiency in view of the problems of lowering the electrodes in the existing electric calciner

Method used

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Embodiment Construction

[0010] The specific embodiment of the inventive method is:

[0011] The present invention is mainly by changing the original lower electrode method. When lowering the electrode, use some electric calcined coal that has been dehydrated, deashed and has low specific resistance to replace the anthracite that needs to be calcined near the electrode. Before lowering the electrodes, add the calcined electric calcined coal into the electric calciner. The indicators of the electric calcined coal are: resistivity: 500-650μΩm; ash content ≤ 7%; volatile matter ≤ 1.0%; moisture ≤ 1.0%; true Density≥1.82g / cm 3 ; Sulfur content ≤ 0.3%. This enables the electric forging furnace to increase the starting power and shorten the time from its operation to the normal production interval when the electrode is lowered and starts to run. Ensure that the electric calciner can quickly run to normal power to produce electric calcined coal; make the furnace temperature rise rapidly, ensure that the o...

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Abstract

A method for placing electrodes under an electric calciner. The present invention is based on the original lower electrode technology of the electric calciner, adding some materials with lower specific resistance in advance to replace the anthracite near the original electrode, changing the traditional concept, breaking the inherent thinking mode, thereby changing the electric calciner Power up time after lower electrode. The specific plan is: before lowering the electrodes, add the calcined electric coal into the electric calciner. The indicators of the electric calcined coal are: resistivity: 500-650μΩm; ash content ≤ 7%; volatile content ≤ 1.0%; moisture content ≤ 1.0%; true density ≥ 1.82g / cm3; sulfur content ≤ 0.3%. Due to the use of this material, using the new method of lowering the electrodes in the electric calciner, it only takes 2-3 hours to increase the power under normal conditions, and the energy consumption is 900-1200KWh / time. Adopting the present invention shortens the time for lowering the electrodes, from 5-6 hours for raising the power of the original lowering electrodes to 2-3 hours. Save a lot of energy consumption.

Description

technical field [0001] The invention belongs to the field of high-temperature heat treatment kilns for electric calcined coal, and in particular relates to a method for lowering electrodes in an electric calciner. Background technique [0002] The electric calciner is a high-temperature heat treatment kiln for the production of cathode carbon blocks for aluminum and electric calcined coal, the raw material for electrode paste for super-large submerged arc furnaces. Its working principle is to introduce current through the upper and lower electrodes, and use the heat generated by the resistance of the carbonaceous raw material itself to heat-treat the carbonaceous raw material; at the same time, the heat energy used is also the heat generated by the combustion of the volatile matter eliminated by the material during the heating process. [0003] When the traditional electric calciner is operated with electrodes lowered, the indicators of Taixi anthracite near the original ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L9/08
Inventor 张凯峰曹培峰张赤
Owner 宁夏宁平炭素有限责任公司
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