Possibly you
have heard of Graphite Crucible,which can be created of graphite. Which is for
positive. But how much do you realize concerning the machining of graphite?
Let us speak
about the graphite purification strategy. To be certain, graphite purification,can be divided into two techniques which could be
included chemical purification and physical purification.
Now, let’s say
one thing about chemical purification, which belongs to Graphite
Machining. Usually speaking, chemical purification can make
use of the nature on the graphite’s acid resistance, alkali resistance and
anti-corrosion. We are able to use acid and alkali to do remedy for graphite
concentrated ore. Consequently, we are able to make impurities dissolve.
Following that, we are able to wash all of the impurities away. In this way, we
can increase concentrate ore’s grade. By utilizing the technique of chemical
purification, we can get grade 99% of higher carbon graphite. Electric
Discharge Machining may also be employed.
However, there
are various techniques for chemical purification, the approach which we most
broadly use can be sodium hydroxide high-temperature melting technique. Graphite
Producer can give us far more specifics.
As for the basic
principle of chemical purification, when it's under the situation of higher
temperature which can be greater than five hundred degrees, the graphite’s
impurities (which primarily belong for the silicate minerals) can react with
caustic soda that is referred to as NaOH. Within this way, we can make them
produce water soluble reactants. At the same time, we can use water to leach
reaction components. Consequently, we are able to remove part of the
impurities. As for yet another part of impurities, such as iron oxides, we are
able to use alkali fusion and HCl to finish neutralization. In this way, we can
make them to generate ferric chloride which can be soluble to water. If we use
water to wash such sort of impurities, they can all be removed.
The equipments
utilizing Alkali fusion could be primarily divided into anchored mixer, melting
furnace, spiral mixer, V sort washing tank and so on. By the way, the recovery
rate could be eighty 5 to ninety %. And we must finish investment with 1
hundred and fifty thousand to two hundred thousand yuan. As all of us know,
though the approach is much more advanced, but you'll find also some
disadvantages. As an example, we have to consume a big amount of water, the
loss of graphite is a lot more, the productivity is low, massive volume of
alkali consumption and emissions of waste pollution to the atmosphere.
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