All,
This is my second installment in a series of posts detailing the yields of harvesting various scrap items.
This installment in the series will show the yield data on Slotted CPU Fingers from processors as seen here:
I determined this information based upon 48 pounds of slotted cpus weighed without heat sinks or plastic housings.
Here's the two boxes of the slotted cpus after the fingers were removed:
The CPUs shown above are PIII slotted cpus. Thirteen of these cpus weigh 1 pound and produce 34 grams of clean cut fingers. The cpu cores do not easily remove like the PII's, so they will remain with the cpu board for future processing.
The CPUs shown above are PII slotted cpus. Ten of these cpus weigh 1 pound and produce 26 grams of clean cut fingers. The cpu cores easily remove and will be saved for future processing. A shot of the PII cores is shown below
Here's the 1347.5 grams of fingers cut from 48 pounds of slotted cpus:
The baggie weighs 12 grams so the actual finger weight is 1335.5 grams.
Now for the reaction information:
The 48 pounds of slotted cpus yielded 1335.5 grams of fingers. The fingers were processed in a mere 20 hours using rejuvenated AP. The AP was left over from processing the ISA fingers as seen in the AP video. It was rejuvenated by bubbling air thru it until the color turned transparent light green before adding the slotted cpu fingers. Air bubbling was continued during the etch process in addition to manual agitation. Here is a shot of the etch in process:
The resulting foils were washed as usual and then dissolved using HCl-Cl. The foils required 3/4 cup of HCl and 1/4 cup of clorox to fully dissolve. The pure gold mud was rinsed three times with hot tap water after precipitating with SMB. Here is a shot of the gold button produced:
The button weighs 6.5 grams.
Finally the yield data is as follows:
(454 * 6.5) / 1335.5 = 2.21 grams Au per pound of slot 1 cpu fingers.
From this the yield data per pound of slotted clean cpu cards is :
6.5 / 48 = 0.1354 grams of Au per pound of slotted cpus without heat sinks or plastic housings.
and lastly average yields for slotted cpu is :
0.1354 / ((10 + 13) /2 ) = 0.0118 grams Au per CPU
My next installment will show yield data for medium grade header pins from 28 pounds of boards.
Your comments and questions are welcomed.
Steve
This is my second installment in a series of posts detailing the yields of harvesting various scrap items.
This installment in the series will show the yield data on Slotted CPU Fingers from processors as seen here:
I determined this information based upon 48 pounds of slotted cpus weighed without heat sinks or plastic housings.
Here's the two boxes of the slotted cpus after the fingers were removed:
The CPUs shown above are PIII slotted cpus. Thirteen of these cpus weigh 1 pound and produce 34 grams of clean cut fingers. The cpu cores do not easily remove like the PII's, so they will remain with the cpu board for future processing.
The CPUs shown above are PII slotted cpus. Ten of these cpus weigh 1 pound and produce 26 grams of clean cut fingers. The cpu cores easily remove and will be saved for future processing. A shot of the PII cores is shown below
Here's the 1347.5 grams of fingers cut from 48 pounds of slotted cpus:
The baggie weighs 12 grams so the actual finger weight is 1335.5 grams.
Now for the reaction information:
The 48 pounds of slotted cpus yielded 1335.5 grams of fingers. The fingers were processed in a mere 20 hours using rejuvenated AP. The AP was left over from processing the ISA fingers as seen in the AP video. It was rejuvenated by bubbling air thru it until the color turned transparent light green before adding the slotted cpu fingers. Air bubbling was continued during the etch process in addition to manual agitation. Here is a shot of the etch in process:
The resulting foils were washed as usual and then dissolved using HCl-Cl. The foils required 3/4 cup of HCl and 1/4 cup of clorox to fully dissolve. The pure gold mud was rinsed three times with hot tap water after precipitating with SMB. Here is a shot of the gold button produced:
The button weighs 6.5 grams.
Finally the yield data is as follows:
(454 * 6.5) / 1335.5 = 2.21 grams Au per pound of slot 1 cpu fingers.
From this the yield data per pound of slotted clean cpu cards is :
6.5 / 48 = 0.1354 grams of Au per pound of slotted cpus without heat sinks or plastic housings.
and lastly average yields for slotted cpu is :
0.1354 / ((10 + 13) /2 ) = 0.0118 grams Au per CPU
My next installment will show yield data for medium grade header pins from 28 pounds of boards.
Your comments and questions are welcomed.
Steve
