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Production method of large-size high-graphite carbon electrode for industrial silicon smelting

A production method and high-graphite technology, which is applied in the field of carbon electrodes, can solve the problems of low mechanical strength, easy cracks, and fractures, and achieve the effects of high mechanical strength, increased output, and high graphite content

Pending Publication Date: 2019-09-03
醴陵南方材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing graphite carbon electrodes have low mechanical strength, high graphite content and high mechanical strength cannot be achieved at the same time, and are prone to cracks, fractures and softening phenomena. Therefore, a large-scale high-graphite carbon electrode for industrial silicon smelting is designed. The production method is very necessary

Method used

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  • Production method of large-size high-graphite carbon electrode for industrial silicon smelting

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The production method of a large-scale high-graphitic carbon electrode for industrial silicon smelting comprises step 1, raw material preparation; step 2, kneading; step 3, molding; step 4, roasting; step 5, mechanical processing;

[0032] Wherein in above-mentioned step 1, according to the mass percentage content of each component is respectively: 25% graphitized petroleum coke powder, 5% metal silicon powder, 20% graphitized petroleum coke A, 15% graphitized petroleum coke Coke B, 7% electric calcined anthracite, 8% artificial graphite chips and 20% binder are selected, and weighed according to the sum of mass percentages being 1;

[0033] Wherein in above-mentioned step two, kneading comprises the following steps:

[0034] 1) Slowly and continuously preheat the clean kneading pot to 140-160°C and then keep it warm;

[0035] 2) Add the above-mentioned graphitized petroleum coke powder, metal silicon powder, graphitized petroleum coke A, graphitized petroleum coke B, ...

Embodiment 2

[0046] The production method of a large-scale high-graphitic carbon electrode for industrial silicon smelting comprises step 1, raw material preparation; step 2, kneading; step 3, molding; step 4, roasting; step 5, mechanical processing;

[0047] Wherein in above-mentioned step 1, according to the mass percentage content of each component is respectively: 25% graphitized petroleum coke powder, 5% metal silicon powder, 20% graphitized petroleum coke A, 15% graphitized petroleum coke Coke B, 9% electric calcined anthracite, 8% artificial graphite chips and 18% binder are selected, and weighed according to the sum of the mass percentages being 1;

[0048] Wherein in above-mentioned step two, kneading comprises the following steps:

[0049] 1) Slowly and continuously preheat the clean kneading pot to 140-160°C and then keep it warm;

[0050] 2) Add the above-mentioned graphitized petroleum coke powder, metal silicon powder, graphitized petroleum coke A, graphitized petroleum coke...

Embodiment 3

[0061] The production method of a large-scale high-graphitic carbon electrode for industrial silicon smelting comprises step 1, raw material preparation; step 2, kneading; step 3, molding; step 4, roasting; step 5, mechanical processing;

[0062] Wherein in above-mentioned step 1, according to the mass percentage content of each component is respectively: 25% graphitized petroleum coke powder, 5% metal silicon powder, 20% graphitized petroleum coke A, 15% graphitized petroleum coke Coke B, 11% electric calcined anthracite, 8% artificial graphite powder and 16% binder are selected, and weighed according to the sum of the mass percentages being 1;

[0063] Wherein in above-mentioned step two, kneading comprises the following steps:

[0064] 1) Slowly and continuously preheat the clean kneading pot to 140-160°C and then keep it warm;

[0065] 2) Add the above-mentioned graphitized petroleum coke powder, metal silicon powder, graphitized petroleum coke A, graphitized petroleum co...

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Abstract

The invention discloses a production method of a large-size high-graphite carbon electrode for industrial silicon smelting, the method comprises the following steps: 1, preparing raw materials; step 2, mixing and kneading; step 3, forming; step 4, roasting; and step 5, machining. According to the mass percentage content of each component, 23-28% of graphitized petroleum coke powder, 2-8% of metallic silicon powder, 18-23% of graphitized petroleum coke A, 11-19% of graphitized petroleum coke B, 6-14% of electrically calcined anthracite, 2-10% of artificial graphite powder and 16-20% of a binderare respectively selected, and are weighed according to the sum of the mass percentages of 1. According to the production method of the large-size high-graphite carbon electrode for industrial silicon smelting, the produced carbon electrode has high graphite content and low specific resistance, the graphite content in the carbon electrode with the diameter of 800-1242 mm can reach 70%, and the carbon electrode has high mechanical strength and is not easy to crack, fracture and soften. Used for smelting industrial silicon, the carbon electrode can effectively improve the output of industrial silicon, the consumption of the electrode and electric energy can be reduced, and the production cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of carbon electrodes, in particular to a production method of a large-scale high-graphite carbon electrode used in industrial silicon smelting. Background technique [0002] Industrial silicon, also known as metal silicon, is a commodity name that appeared in the mid-1960s. Silicon metal is a product smelted from silica and carbonaceous reducing agents in a submerged arc furnace. The content of silicon as the main component is about 98% (in recent years, 99.99% of Si content is also listed in metal silicon), and the remaining impurities For iron, aluminum, calcium and so on. The additional products of metal silicon include microsilica fume, edge silicon, black skin silicon, metal silicon slag, etc. Among them, microsilica fume is also called silica fume, which is widely used in refractory materials and concrete industries. Carbon electrodes are widely used in submerged arc furnaces for smelting industrial ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/532
CPCC04B35/532C04B35/522C04B2235/428C04B2235/95C04B2235/96
Inventor 杨勇
Owner 醴陵南方材料科技有限公司
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