On Thu, 20 Apr 2017 14:50:28 -0700 (PDT), Asaad Kadhem
wrote:

Thank Mr.Ed Huntress ...I read that and your words very true but I need some one who is expert in casting in the workshops because in practice the melt and cast very difficult
Greetings Asaad,
An expert in casting will not be able to give you the advice you need
on this newsgroup because there is too much information to type. So
you really need to get a book aboput casting. Since you are totally
new to this I think a book written so for folks like you would be
best. One that has the casting basics but also enough information so
that as you get more experience there will also be information you can
use. So try this book. "The Complete Metalsmith" by Tim McCreight. The
book covers many aspects of metalsmithing which you may find
interesting but the section on casting is really good for beginners.
It tells you about various fluxes, why they are needed, how they work,
and how to use them. You will need to know this to do the casting you
want to do. The book also covers heat sources and crucibles. I hope
you learn something that you can tell us all about.
Cheers,
Eric