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Novel additive for producing low-resistance high-density graphite material

A graphite material, low resistance technology, applied in heat exchange materials, fibrous fillers, inorganic pigment treatment, etc.

Active Publication Date: 2013-10-16
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to their special f orbital electrons, rare earth elements are widely used in many fields such as catalysis and material performance improvement, but they have not been reported as additives for the production of graphite materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1t of coal-based needle coke with a sulfur content of 1% and a nitrogen content of 0.5%, 0.25t of modified coal tar pitch, and 1.5kg of praseodymium oxide are used for batching. Among them, the coal series needle coke particle size ratio is: 2~4mm, 20%, 1~2mm, 12.5%, 0.15~1mm 20%, 3 above.

Embodiment 2

[0023] 1t of coal-based needle coke with a sulfur content of 1% and a nitrogen content of 0.5%, 0.25t of modified coal tar pitch, and 3kg of praseodymium oxide are used for batching. Among them, the coal series needle coke particle size ratio is: 2~4mm, 20%, 1~2mm, 12.5%, 0.15~1mm 20%, 3 above.

Embodiment 3

[0025] 1t of coal-based needle coke with a sulfur content of 1.5% and a nitrogen content of 0.5%, 0.25t of modified coal tar pitch, and 1.5kg of cerium oxide are used for batching. Among them, the coal series needle coke particle size ratio is: 2~4mm, 20%, 1~2mm, 12.5%, 0.15~1mm 20%, 3 above.

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PUM

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Abstract

The invention relates to a novel additive for producing a low-resistance high-density graphite material, which is a rare-earth compound or rare-earth metal powder. The rare-earth compound is one or a mixture of more of rare-earth oxide, rare-earth carbide, rare-earth halide and other rear-earth organic compounds and inorganic compounds. The invention has the advantage that by adopting a new application of the rear earth compound as a graphite additive, the rear earth compound not only has the function of inhibiting flatulence produced by nitrogen and sulfur in a graphitization process, but also can generate a like homogeneous catalysis graphitization for the graphitization process.

Description

【Technical field】 [0001] The invention relates to the technical field of graphite materials, in particular to a novel additive for producing low-resistance and high-density graphite materials. 【Background technique】 [0002] One of the key factors affecting the performance of graphite products during graphitization is gas expansion. When the baked product is in the graphitization furnace, when the temperature rises above 1400°C, elements such as hydrogen, sulfur, nitrogen will be converted into H 2 , H 2 S, N 2 , NH 3 Among them, the nitrogen element is mainly released at 1400-1900°C, and the sulfur element is concentrated in the range of 1700-2100°C. At this time, the pore wall of the coke in a plastic state is under the pressure of the exhaust gas, and the volume expands and decreases. The physical and chemical properties of graphite products. By adding a gas expansion inhibitor and controlling the temperature rise rate in the temperature range of 1700-2100 ° C during...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/46C09C3/06C09K5/14C01B31/04
Inventor 路贵民张灿于建国孙泽孙淑英宋兴福
Owner EAST CHINA UNIV OF SCI & TECH