When gold is smelted in conventional smelters it needs to have a...

When gold is smelted in conventional smelters it needs to have a concentration of at least 20 oz/t and on average 50 oz/t according to 911Metallurgist. Also the melting point of gold is 1063 degrees Celsius and silicates (Si02) melt at 1,725 degrees Celsius.

https://www.911metallurgist.com/blog/gold-smelting-refining-process

The requirement for conventional smelting for gold to have a concentration of at least 20oz/t means that even at your so called grade of 2 oz/t the ore as you call it would need to be concentrated by at least 10 times.

Reading the latest scheme for extraction in the BBX exploration update they say that after the 5kg sample is riffle split it is sent to the Nomos laboratory, Rio de Janeiro. Brazil for preparation where the sample is dried, milled in a ball mill dedicated to BBX samples to 95% minus150 mesh.

The prepared material is then smelted without any form of prior concentration with a copper collector and flux.

How much copper is required to effect the smelting and recovery of 1oz of gold and what purity does the copper need to have? Is the copper reused and if so does it need to undergo some form of purification for reuse. What is the flux and how much does it cost per oz of recovered gold. What temperature is the smelt and how much energy would it take to get a tonne of unconcentrated ore to its melting point? How much nitric acid is required to dissolve the silver off the copper collector and how long does that process take? What do the remaining processes to recover the gold off the copper cost per oz of recovered gold?

Eshmun