My personal opinion is that you should not use H2O2 on the carbon as it is a strong oxidant and will likely damage the carbon surface and not necessarily strip any of the metals adsorbed on the carbon surface.  If you have been regularly acid stripping your carbon, it likely could survive a use without stripping prior to your obtaining HCl acid.  The acid removes the metal ions as a salt; H2O2 will oxidize metal ions but not necessarily remove them and will likely oxidize the carbon surface area rendering it less able to adsorb the gold cyanide complex.

Hi Jovanifirebird.  HCl is used before thermal regeneration mainly to remove Ca elements from the surface and the pores of the carbon.  Not acid washing can lead to Ca being baked into the carbon which will occlude the pores and reduce the activity ( adsorption capability) of the carbon.  Using hydrogen peroxide instead could be very dangerous as organics are not compatible with hydrogen peroxide and when the two come into contact there can be a violent exothermic reaction.

You can monitor the buildup of inorganics on and in the carbon by doing Apparent Density (AD) tests on the carbon.  New AD of carbon should be between 45 and 50, some carbons go up to 55.  If the circuit carbon is above 60, then acid washing of the carbon is definitely required.

I agree with Richard S comments above, that hydrogen peroxide should not be used, and that the circuit carbon can go without acid washing for several cycles until your HCl arrives on site.  You may have to increase the acid strength for the acid wash fior a period until the AD gets back closer to normal.  If you do increase the concentration of acid in your acid wash, you will need to extend the water wash period after acid washing of the carbon prior to regeneration in your kiln.  Monitor the pH of the water wash effluent and when it is close to neutral, then you can go ahead and regenerate the carbon in the kiln.  Hope this helps.

thanks guys. it helps a lot. really appreciate your ideas.