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Method for formulating graphite electrode formula by applying energy accumulation height

A technology of graphite electrodes and formulations, which is applied in electric heating devices, electrical components, heating through discharge, etc., can solve the problems of electrodes cracking, falling off and breaking, and achieve the effects of enhancing reliability, adding a reasonable amount, and avoiding electrode cracking

Pending Publication Date: 2022-01-11
JILIN CARBON
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for formulating graphite electrode formulas by applying energy accumulation height, which solves the problem of using the maximum particle size of graphite electrode formulas under different furnace conditions and different equipment conditions, and solves the problem that the graphite electrode formulas have a particle size in kneading During the pressing process, the performance evaluation of mutual insertion and interlocking can avoid the problem of electrode cracking, falling off and breaking due to the particle size added in the formula to the greatest extent.

Method used

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  • Method for formulating graphite electrode formula by applying energy accumulation height
  • Method for formulating graphite electrode formula by applying energy accumulation height
  • Method for formulating graphite electrode formula by applying energy accumulation height

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Embodiment 1

[0112] A steel factory received a large number of low-carbon steel orders, and the smelting steel was changed from the production of medium-carbon steel to the production of low-carbon steel. During production, the refining furnace of the plant frequently experienced carburization of molten steel, causing 7 furnaces of molten steel out of 270 furnaces to be scrapped. The maximum rate of carbon increase in a single furnace is 0.06%, and about 45Kg of carbon enters the molten steel after calculation. The investigation found that the scrapped 7 heats of molten steel were all caused by cracking, falling off, and falling off of the graphite electrode hole wall when the Φ500mm UHP ultra-high power electrode was used at the joint connection part. Steel manufacturers require graphite electrode manufacturers to improve the production formula of graphite electrodes in a short period of time to meet the actual requirements of producing low carbon steel.

[0113] Through the analysis of ...

Embodiment 2

[0163] A steel factory has 3 electric furnaces to produce plain carbon steel. The graphite electrode used is: Φ550mm UHP ultra-high power graphite electrode. Electric furnace transformer 60MVA, maximum secondary current 50KA, maximum secondary voltage 846V, all scrap steel smelting. The graphite electrode procurement method of the steel plant is: cash plus consumption lump sum (the cost assessment index of steel electrode per ton is 54 yuan / t, and the consumption of steel electrode per ton is 2.15kg / t). In order to develop users, the company provides 15 Φ550mm UHP ultra-high power graphite electrodes for testing. Experimental results The consumption of Φ550mm UHP ultra-high power graphite electrode exceeds the given index.

[0164] Through the investigation of the use of Φ550mm UHP ultra-high power graphite electrodes in steel mills, according to the on-site tracking data, the main problems that caused the consumption index of Φ550mm UHP ultra-high power graphite electrodes ...

Embodiment 3

[0221] A 150tEBT ultra-high power DC furnace in a steel plant uses a Φ700mm UHP ultra-high power graphite electrode. The furnace transformer is 100MVA, the maximum secondary current is 120KA, and the maximum secondary voltage is 670V. As the target user company is ready to develop.

[0222] Investigation on the use of graphite electrodes in steel mills: the electric furnace uses water-cooled steel rods as the anode system of the electric furnace, and the Φ700mmUHP ultra-high power graphite electrode is used as the cathode; the electric furnace uses the Φ700mmUHP ultra-high power graphite electrode as the cathode, and the Φ700mmUHP ultra-high The electrode is consumed in a concave state under the action of the plasma arc. In actual production, the cracking of the graphite electrode is almost accompanied by the whole smelting process; The connection part is 1.5-1.8 meters away from the molten steel, and the electrode will also break under the action of thermal stress; the resid...

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Abstract

The invention relates to a method for formulating a graphite electrode formula by using an energy accumulation height, and the method comprises the following steps: 1, selecting a proper raw material for producing a graphite electrode; 2, establishing a mathematical model of a graphite electrode theoretical formula; 3, establishing a mathematical model for estimating an asphalt amount in the graphite electrode theoretical formula; 4, carrying out weight optimization on the graphite electrode theoretical dry material formula through a potential energy impact experiment, and obtaining the optimal graphite electrode formula to guide mass production, so the problem that the graphite electrode formula uses the maximum particle size under different furnace conditions and different equipment conditions is solved; the problem of evaluating the mutual plugging and meshing performance of the graphite electrode formula in the mixing, kneading and profiling process is solved, and the problems of cracking, chipping and breaking of the electrode due to the fact that the addition granularity in the formula is not uniform are avoided to the maximum extent.

Description

technical field [0001] The invention relates to the field of graphite electrode formulations, especially a method for formulating graphite electrode formulations using energy accumulation height. Background technique [0002] With the development of my country's automobile, home appliance, construction machinery and other industries, discarded steel and non-ferrous metals have become difficult-to-handle garbage in cities. They must be smelted by electric arc furnaces to turn waste into treasure. Graphite electrode is an irreplaceable consumable for electric arc furnace steelmaking. Its consumption is directly related to the cost of steelmaking enterprises, and the power consumption is also related to the safety of equipment and personnel in smelting enterprises. Therefore, iron and steel enterprises are calling on carbon production enterprises to improve electrode formula all the time, reduce the fracture rate and accident rate of electrodes and reduce electrode consumption....

Claims

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Application Information

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IPC IPC(8): H05B7/085F27B3/08
CPCH05B7/085F27B3/085
Inventor 崔国伟贾文涛姜彦明
Owner JILIN CARBON
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