-There are different ways to calm down an angry colleague.
-Move the argument to a private place.
It would be ideal if in a professional setting, every worker got along every time. Unfortunately, that is not so as when pressure heats up, tempers can heat up as well.
Note that when happens, and another colleague in your workplace becomes angry at you and starts exploding, there are some things you can do to calm the colleague.
Check them out.
When you find yourself in this situation, what you need to do is to take deep breaths and calm down instead for you to argue or raise your voice at the other colleague.
After you have done this, you should respond in a calm, even tone. Note that this is likely to calm the colleague down, and even if he is not calm, in the presence of others, the other person would appear to be irrational.
Move the argument to a private place
If you see that the situation is getting out of hand, and the other colleague is not calm, the best thing for you to do would be to move into a private area so that you would not disturb others and also get penalized.
Talk it through
Many conflicts can be resolved by just talking them through, so try to reason with your colleague. That way, if the person is reasonable, you would be able to resolve the issue.
Discuss in the presence of a co-worker
Discussing in the presence of another colleague or supervisor can also help to resolve the situation as the person can serve as the witness and mediator especially if the person is a member of your team.
Look for a solution
Sometimes, for the sake of professionalism, it is important to not focus on who is right, but how to bring everything to order.
Therefore, even if the person is wrong and you are hundred percent right, if it means swallowing your pride, do so just to resolve the issue.