recycled and used graphite carbon brick with low price 
Denfinition:
graphite carbon brick (recycled and used graphite graphite carbon
brick with low price ) is a neutral refractory product made of
carbonaceous as raw materials, adding appropriate amount of binder.
Raw Merterial:
graphite carbon brick raw materials include anthracite, coke and
graphite, as well as asphalt, tar and anthracene oil and other
bonding agent. AS anthracite volatile less, and has dense
structure, graphite carbon brick use it as aggregate, adding
metallurgical coke (coal), and asphalt as a binder.
Production process:
the production process of graphite carbon brick is similar with
other refractory bricks, but carbon is easy to be oxidized at high
temperatures, so the raw materials roasting and products firing
must be carried out in a reducing atmosphere. Anthracite should be
roasted before use to remove volatile, sulfur, moisture, and
increase the volumetric stability, mechanical strength and
oxidation resistance of anthracite. Coke should be dried first to
avoid molding difficulties due to high moisture content and the
product cracking during firing. Asphalt should first melt and
dehydration, so that the water content is less than 0.2%,
dehydration temperature should be 120 ~ 160 ℃.
graphite carbon brick ingredients are roasted granular anthracite
as aggregate, and its particle size depends on the size of the
product: anthracite in large brick is 8 to 12 mm, small brick is 4
to 6 mm. Anthracite is about 60%. Coke is added with fine powder
state, whose particle size of less than 88 microns should be about
70%. Blast furnace used graphite carbon brick binder is usually
added from 15 to 20%. In order to prevent oxidation, the brick in
the firing use coke powder or coal powder as protection filler.
graphite carbon brick’s firing temperature is 1300 ~ 1450 ℃,
holding time is about 20 hours, the total firing time is about 240
to 420 hours,and then cooled to 40 ~ 60 ℃, finally be taken out
from the kiln. It is must be paid attention that graphite carbon
brick out of the kiln is in high temperature, easy to fired and
burn.
Features of graphite carbon brick:
1. good thermal stability,
2. Small thermal expansion coefficient,
3. high temperature resistant,
4. resistant to acid, alkali, salt and organic solvent erosion,
5. but easy to oxidation in the oxidation atmosphere.
Uses of graphite carbon brick:
1. metallurgical industry, such as blast furnace
2. aluminum electrolytic cells
3. pickling tank, plating tank of electroplating industry
4. dissolving tank of paper making industry
5. reaction tank, storage tank of chemical industry
6. autoclave of petrochemical industry and so on.
