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Preparation method for graphite carbon material

A technology of graphite carbon and production method, which is applied in the production field of graphite carbon materials, can solve the problems of excessive carbon residue content in finished products, incomplete oxidation-reduction reaction, large aggregate particles, etc., and achieves low production cost and internal structure. Uniform and dense, porosity reduction effect

Active Publication Date: 2013-08-28
兴和县鑫源碳素有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the special graphite anodes for smelting rare earths on the market are made of waste electrodes through mechanical cutting. The quality is unstable, the aggregate particles are large, the redox reaction is incomplete, the consumption is large, the residual carbon content of the finished product often exceeds the standard, and other Impurities may also exceed the standard
In addition, although the fine-structured graphite anodes on the market have a long service life and are resistant to consumption, the production cost is high and the process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: The specification is (430mm × 950mm × 70mm)

[0021] (1), dry material and binder kneading, cooling material, molding

[0022] The high-quality calcined petroleum coke with a true density of 2.08% or more and an ash content of 0.3 or less (including 0.3) is ground and screened to obtain three particle size powders of 1.5mm, 0.5mm, and 0.074mm according to 74kg, 350kg, and 276kg Proportioning: After 45 minutes of dry mixing, after heating to 180°C, it becomes 700kg of dry material; then add 147kg of medium-temperature coal tar pitch with a softening point of 85°C-90°C, knead at 185°C for 2.5 hours, and then load it into a press. Vacuum 0.076mpa extrusion molding.

[0023] (2), primary roasting

[0024] The pressed green body is roasted according to a roasting process. The roasting process is as follows: the furnace temperature rises from room temperature to 350°C in 12 hours, and in 12-60 hours, the temperature rises by an average of 5°C per hour. In 60-2...

Embodiment 2

[0035] Embodiment 2: The specification is (430mm × 950mm × 70mm)

[0036] (1), dry material and binder kneading, cooling material, molding

[0037]The high-quality calcined petroleum coke with a true density of 2.08% or more and an ash content of 0.3 or less (including 0.3) is ground and screened to obtain three particle size powders of 1.5mm, 0.5mm, and 0.074mm according to 84kg, 336kg, and 280kg Proportion, after 45 minutes of dry mixing, after heating to 180°C, it will be 700kg of dry material; then add 147kg of medium-temperature coal tar pitch with a softening point of 85°C-90°C, knead at 185°C for 3 hours, and then put it into the press. Vacuum 0.076mpa extrusion molding.

[0038] (2), primary roasting

[0039] The pressed green body is roasted according to a roasting process. The roasting process is as follows: the furnace temperature rises from room temperature to 350°C in 12 hours, and in 12-60 hours, the temperature rises by an average of 5°C per hour. In 60-276 ho...

Embodiment 3

[0050] Embodiment 3: the specification is (430mm * 950mm * 70mm)

[0051] (1), dry material and binder kneading, cooling material, molding

[0052] The high-quality calcined petroleum coke with a true density of 2.08% or more and an ash content of 0.3 or less (including 0.3) is ground and screened to obtain three particle size powders of 1.5mm, 0.5mm, and 0.074mm according to 84kg, 343kg, and 273kg Proportion, after 45 minutes of dry mixing, after heating to 180°C, it will be 700kg of dry material; then add 147kg of medium-temperature coal tar pitch with a softening point of 85°C-90°C, knead at 185°C for 3 hours, and then put it into the press. Vacuum 0.076mpa extrusion molding.

[0053] (2), primary roasting

[0054] The pressed green body is roasted according to a roasting process. The roasting process is as follows: the furnace temperature rises from room temperature to 350°C in 12 hours, and in 12-60 hours, the temperature rises by an average of 5°C per hour. In 60-276 h...

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Abstract

The invention provides a preparation method for a graphite carbon material, wherein, the graphite carbon material is prepared from the following required components in parts by weight:. 99-101 parts of calcined petroleum coke dry material and 20-25 parts of melting asphalt. The preparation method comprises the following steps: (1) mixing and kneading the dry material and an adhesive and then cooling and molding the mixture; (2) calcining for the first time; (3) soaking for the first time; (4) clacining for the second time; (5) soaking for the second time; (6) calcining for the third time; and (7) carrying out a graphitization process. The novel graphite carbon material prepared in accordance with the invention has the advantages of antioxidation, good heat and corrosion resistance, excellent conductivity and good thermal shock resistance, so that the lifetime is as over three times as that of a common graphite anode.

Description

Technical field: [0001] The present invention relates to a production method of a graphite carbon material, in particular to a production method of a carbon material with anti-oxidation, high temperature resistance, corrosion resistance, high mechanical strength, strong electrical conductivity and good thermal shock resistance . Background technique [0002] High-purity graphite anodes for smelting rare earths are new tool materials in the non-metallic field, and are widely used as anodes in electrolytic furnaces that electrolyze rare earth metals. The rare earth metal electrolytic furnace is made of high-purity graphite plate to manufacture a rectangular graphite pool and an iron sleeve. The rare earth metal oxide is placed in the furnace, and a tungsten rod is inserted into it to be electrified as the cathode. Four quarter circles are hung on the four walls of the crucible. The arc-shaped graphite product surrounded by the cylinder is used as the anode to conduct electric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02
Inventor 张存禄孔繁凯郭海涛梁行方孔向民张峰王义
Owner 兴和县鑫源碳素有限公司
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