R
I've started assaying with an assay start up kit that included an assay flux.
The formula is:
41 gr. litharge
27 gr. soda ash
18 gr. borax anhydrous
2.5 gr. charcol
1.5 gr. silica
I have roasted all of the samples before the assay.
Since then I have purchased some more literature on fire assaying (a textbook of Fire Assaying By Edward E. Bugabee, and Fire assaying by Shepard & Dietrich).
The main ore I'm working with at this time is an altered basalt with quartz fissures, and misc sulfides. As a whole there is very little quartz, compared to the average gold in quartz ore.
After reading the section on assay fluxing in Bugbee's book, I'm wondering if the small amount of quartz in the ore I'm working with would be a problem with the flux I've been using (with the very small amount of silica added).
I'm going to try the regular flux formula in Bugbee's book, with the oxidizing addative.
Any thoughts on this?
rookieminer
The formula is:
41 gr. litharge
27 gr. soda ash
18 gr. borax anhydrous
2.5 gr. charcol
1.5 gr. silica
I have roasted all of the samples before the assay.
Since then I have purchased some more literature on fire assaying (a textbook of Fire Assaying By Edward E. Bugabee, and Fire assaying by Shepard & Dietrich).
The main ore I'm working with at this time is an altered basalt with quartz fissures, and misc sulfides. As a whole there is very little quartz, compared to the average gold in quartz ore.
After reading the section on assay fluxing in Bugbee's book, I'm wondering if the small amount of quartz in the ore I'm working with would be a problem with the flux I've been using (with the very small amount of silica added).
I'm going to try the regular flux formula in Bugbee's book, with the oxidizing addative.
Any thoughts on this?
rookieminer