RE:TRUMPERHELP, my head hurts!!! (from hitting it against the wall, not using it to calculate). Somebody out there - help me as my pencil is worn!
Our friend, WangoTango67 said:
Now trumper...
i don't need another calculator...lol
a simple proving of .01% can be back checked to prove (100 ppm / .01% ) is incoorect.
ppm deals in kg / liter = 1,000,000 ppm
100 ppm = .0001%
simply calculate it
1,000,000 ppm in one kg
x .0001 %
= 100 ppm
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Please read - carefully - my response about % as % is 1/100th.
As Google search "what % is 100 ppm" SHOWS "0.01%": https://www.google.com/search?q=what+%25+is+100+ppm&oq=what+%25+is+100+ppm&aqs=chrome..69i57j0l4j0i22i30l5.9449j0j7&sourceid=chrome&ie=UTF-8
https://opentextbc.ca/geology/chapter/20-1-metal-deposits/ show ppm needed for economical copper:
To calculate the grade of copper for the sample, geologists use the equation: (amount of copper metal/amount of copper ore rock)*100 [WangoTango note x 100 because converting to % as the standard]
If a deposit area has 200lbs of copper in 10,000lbs of ore rock, what is the grade? 200/10000*100=2%
If a deposit area has 6 tons of copper in 1,000 tons of ore rock, what is the grade? 6/1000*100=0.6%
Typical mines today have ore grades of only 0.6 percent copper. Since metal concentrations occur at much lower grades, the copper concentrations are measured in parts per million (ppm). If a sample has 1ppm copper, this means that in 1 million lbs of rock, there is 1 lb of copper.
If a copper concentration comes back from the lab as 100ppm of copper, how many lbs of rock must be mined to have 100lbs of copper? 100lbs Cu/x=100/1,000,000ppm= 1,000,000lbs [WangoTango this means 1,000,000# divided by 2200#/t = 454 tonnes needed = 0.22# x $4/# = $0.88 - all done in Imperial]
Some background levels of important metals in average rocks are shown on Table 20.1, along with the typical grades necessary to make a viable deposit, and the corresponding concentration factors. Looking at copper, for example, we can see that while average rock has around 40 ppm (parts per million) of copper, a grade of around 10,000 ppm or 1% is necessary to make a viable copper deposit. In other words, copper ore has about 250 times as much copper as typical rock.
https://www.geo.arizona.edu/sites/www.geo.arizona.edu/files/understanding%20ore%20deposits%20answers%20copy.pdf
BTW, 1 ppm = 1g/t & nothing to do with %