Here karat gold is starting to melt in a crucible in the induction furnace.  It may contain left over gold from previous manufacture, new pure (.9999+) gold with other metals (alloys) or a combination of both. 

The gold being poured into an upright rod form.

The rod after it has been removed from the form and cleaned. The large button shape at one end is where the melt filled the very top of the form that is flared to allow ease in pouring.  

The rod after the flared top has been cut off.  This must be done because this large end would never pass through the mill in the rolling process

The start of the rolling of the rod through the square wire rolling mill. If you look closely, you will note how rough the rod is at this point. 

After the first couple roll thoughs, flat areas on the rod are starting to appear. It is just beginning to start to take on a square shape

After a number of passed it has lengthened considerable and taken a full square shape

The rod is rolled through to the desired thickness.  If it is necessary to reduce it more than 50%, annealing will generally be required.  As metal is worked and rolled it gets harder and harder and will eventually reach a point where it becomes very hard to work and can even become brittle and start to crack.  To alleviate this, the metal is put in an oven and heated to a high temperature for a period of time.  The result is a marked softening of the metal, allowing for further milling.  This process of softening is called annealing.

A close up shot of finished karat gold rod that has been cut into desired lengths.