A kind of negative material high temperature purification special graphite crucible manufacturing

A kind of negative material high temperature purification special graphite crucible manufacturing

  • CN 105,218,098 A
  • Filed: 10/29/2015
  • Published: 01/06/2016
  • Est. Priority Date: 10/29/2015
  • Status: Active Application
First Claim
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1. a negative material high temperature purification special graphite crucible manufacturing, is characterized in that carrying out according to following operation steps successively:

  • A. number prepares following raw material by weight ratio;

    2 ~ 4mm particle diameter graphitized coke 20-22,1 ~ 2mm particle diameter graphitized coke 18-20,0-0.075mm particle diameter graphitized coke 45-50, upgrading medium temperature coal pitch 23-24;

    B. the graphitized coke of three kinds of particle diameters being added temperature is preheating to be dry mixed stirring 30 minutes for subsequent use in the kneading pot of 160 ~ 180 DEG C, join after upgrading mid-temperature pitch being heated to 170 ~ 180 DEG C of temperature in other container in kneading pot, then continue kneading to stir and make thickener in 40 minutes, finally thickener is cooled to 135 ~ 140 DEG C for subsequent use;

    C. operate control pressure die temperature and rise to 145 ~ 150 DEG C, start pressurization after thickener being loaded mould, when pressurize after pressure increase to 10 ~ 11MP 3 minutes, then operate control pressure mould cooling down to 60 ~ 70 DEG C, carry out depanning after cooling and shaping, make stock;

    D. the stock of batch is loaded in stoving oven, keep 24 hours after maturing temperature is warming up to 1220 ~ 1250 DEG C, then naturally cool to less than 100 DEG C and come out of the stove, be fabricated to finished product.

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