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A method for forming large-scale isostatic graphite products

A molding method and isostatic pressing technology, applied in the direction of presses, manufacturing tools, etc., can solve the problems of time-consuming and energy consumption, complex production methods and processes, and achieve simplified isostatic pressing molding process, high yield and high bulk density. Effect

Active Publication Date: 2016-11-30
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, but the production method process is more complicated, need two roasting, two isostatic pressing molding, very time-consuming and energy-consuming

Method used

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  • A method for forming large-scale isostatic graphite products
  • A method for forming large-scale isostatic graphite products
  • A method for forming large-scale isostatic graphite products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Raw material formula (mass percentage):

[0047]

[0048] Isostatic graphite molding method:

[0049] (1) Take the raw materials according to the above formula, grind the raw needle coke, calcined petroleum coke, and pitch coke into powder with a particle size greater than 325 mesh and less than 200 mesh, and then grind the needle coke, calcined petroleum coke, and pitch coke into powder , carbon black, and high-purity graphite powder with a purity of 99.99% were mixed at a temperature of 135° C. for 0.5 hour, and dry-blended into mixture A;

[0050] Take the modified asphalt (accounting for 38% of the weight of mixture B), first heat it to 180°C, then add oleic acid (accounting for 0.5% of the weight of mixture B) to form a modified asphalt mixture, keep warm and stir for 40min;

[0051] For the first time, add 65% of the modified asphalt mixture to mixture A, and carry out wet mixing at a temperature of 160-180°C. The time for the first wet mixing is 60 minutes, a...

Embodiment 2

[0058] Raw material formula (mass percentage):

[0059]

[0060] Isostatic graphite molding method:

[0061] (1) Take the raw materials according to the above formula, grind the raw needle coke, calcined petroleum coke, and pitch coke into powder with a particle size greater than 325 mesh and less than 200 mesh, and then grind the needle coke, calcined petroleum coke, and pitch coke into powder , carbon black, and high-purity graphite powder with a purity of 99.99% were mixed at a temperature of 135° C. for 1.0 hour, and dry-blended into mixture A;

[0062] Take the modified asphalt (accounting for 40% of the weight of the mixture B), first heat it to 200°C, then add oleic acid (accounting for 0.5% of the weight of the mixture B) to form a modified asphalt mixture, keep warm and stir for 30min;

[0063] For the first time, add 60% of the modified asphalt mixture to mixture A, and carry out wet mixing at a temperature of 160-180°C. The time for the first wet mixing is 60 mi...

Embodiment 3

[0070] Raw material formula (mass percentage):

[0071]

[0072] Isostatic graphite molding method:

[0073] (1) Take the raw materials according to the above formula, grind the raw needle coke, calcined petroleum coke, and pitch coke into powder with a particle size greater than 325 mesh and less than 200 mesh, and then grind the needle coke, calcined petroleum coke, and pitch coke into powder , carbon black, and high-purity graphite powder with a purity of 99.99% were mixed at a temperature of 135° C. for 1.0 hour, and dry-blended into mixture A;

[0074] Take the modified asphalt (accounting for 42% of the weight of mixture B), first heat it to 220°C, then add oleic acid (accounting for 0.5% of the weight of mixture B) to form a modified asphalt mixture, keep warm and stir for 60min;

[0075] For the first time, add 65% of the modified asphalt mixture to mixture A, and carry out wet mixing at a temperature of 160-180°C. The time for the first wet mixing is 60 minutes, a...

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Abstract

A forming method of large-sized isostatic pressing formed graphite comprises the following steps: grinding raw materials needle coke, calcined petroleum coke, pitch coke, carbon black and natural graphite, dry-mixing to obtain a mixture A, wet-mixing modified asphalt, oleic acid and the mixture A at 160-180 DEG C to obtain a mixture B; discharging the mixture B and rolling, roasting the rolled sheet at the roasting temperature being not lower than 1000 DEG C; grinding the roasted rolled sheet to obtain a powder A; wet-mixing the powder A with modified asphalt and oleic acid at the temperature of 180-220 DGE C to obtain a mixture C; discharging the mixture C at the temperature of 160-180 DEG C, rolling, cooling and grinding to obtain a powder B; mixing the powder B at the temperature of 50-70 DGE C, bagging and carrying out isostatic pressing forming. The isostatic pressing formed product prepared by the above method has advantages of large size, high density and uniform internal structure. The forming method provided by the invention greatly lays a good foundation for the roasting process of the isostatic pressing formed product.

Description

technical field [0001] The invention relates to the field of isostatic graphite material manufacturing, in particular to a method for forming large-scale isostatic graphite products. Background technique [0002] Isostatic graphite is a new type of graphite material developed in the 1960s, which has a series of excellent properties. For example, isostatic graphite has good heat resistance. In an inert atmosphere, its mechanical strength not only does not decrease as the temperature increases, but increases, reaching the highest value at about 2500 ° C; compared with ordinary graphite, the structure Fine and dense, and good uniformity; low thermal expansion coefficient, excellent thermal shock resistance; isotropic; strong chemical corrosion resistance, good thermal conductivity and electrical conductivity; excellent machining performance. It is precisely because of this series of excellent properties that isostatic graphite is widely used in the fields of metallurgy, chemis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B30B13/00C04B35/52C04B35/622
Inventor 张培模张培林赤九林庞中海李军祁进君阮明礼
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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