Crucibles are used more and more widely, so there are also many matters to pay attention to in use, so the editor summarizes someUsage of graphite crucibleYes, this time I will teach you how to clean the graphite crucible.

I believe that manufacturers using graphite crucibles know that graphite crucibles have the characteristics of large bulk density, high temperature resistance, fast heat transfer, acid and alkali corrosion resistance, high temperature strength, and high oxidation resistance. However, for the refining of individual raw materials, the cleaning work after the crucible is used is very troublesome.

How to clean graphite crucible:

The first thing to clean the graphite crucible is to clean the chemical substances in the crucible. We need to decide what to clean according to the residual substances in the graphite crucible. Generally, the attachments on the graphite crucible are residues after inorganic combustion. We can use hydrochloric acid to clean them. Most of them are soluble. Some residues contain carbon components, Hydrochloric acid cannot be dissolved. At this time, nitric acid can be used for cleaning, because nitric acid has strong oxidation, and it can also be heated appropriately during cleaning.

For those substances that are still difficult to clean, boil them in dilute hydrochloric acid or dilute nitric acid. Note that the hydrochloric acid used must not contain nitric acid, nitrate, halogen and other oxidants. If dilute nitric acid can not be cleaned, use potassium pyrosulfate, sodium carbonate or borax to melt and clean.

The graphite crucible needs to be kept clean and bright inside and outside. After a long time of burning, the crucible may be dull on the outside, and it will go deep into the inside over a long period of time, which will cause the crucible to be fragile and broken. Therefore, unclean substances must be removed. If there are still stains or the surface is dark, gently rub the fine sand without sharp edges and corners passing the 100 sieve with water to restore the luster of the surface.

Have you learned anything? Isn't it also quite simple? It's mainly to pay more attention to it during use, and then clean the graphite crucible according to the method of Xiaobian. You don't need to worry too much, because this can prolong the timeGraphite crucibleService life of.