115 ore extraction after a mining company has removed overburden extraction of the mineral ore begins using specialized heavy equipment and machinery such as loaders haulers and dump trucks which transport the ore to processing facilities using haul roads this activity creates a unique set of environmental impacts such as emissions of.
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18 view southwest of sample site at hot springs mine bear lake county idaho showing sample wpq2013c cut along line 19 view northwest of waste rock dump at little diamond creek mine utah county utah showing sample site wpd2009c 20 view north of waste rock dumps at cokeville mine lincoln county wyoming showing sample site wpd2011c
A methodology to estimate ores work index values using miduk copper mine sample m noaparast 1 s rahmati 1 g jozanikohan 1 s aslani 1 and a ghorbani
Average sample number asn for a single sampling lasp nc we know each and every lot has a sample of size n can be calculated assuming all lots come in with a defect level of p a plot of the asn versus the incoming defect level p describes the sampling efficiency of a given lasp
Calculate the sample size using the below information in the excel template for 2 different sets of data we have found the sample size for the first set manually we found the z value since the total value mean value and standard deviation are given for the second set a directly z score is given for 85 of confidence
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Copper is usually found in nature in association with sulfur pure copper metal is generally produced from a multistage process beginning with the mining and concentrating of lowgrade ores containing copper sulfide minerals and followed by smelting and electrolytic refining to produce a pure copper
Copper mineral 1808 chino pit new mexico 9 x 35 x 025 cm 25 a fairly flat but 3d piece of native copper with a little rock matrix native copper mineral 1809 ray mine arizona 65 x 5 x 1 cm 1031 grams 55 a clean 3d piece of native copper with virtually no matrix native copper mineral 1809 another view with a change in light
Copper ore 120150 copper ore crushed 100150 copper sulfate bluestone 7585 copperas see ferrous sulfatecopra cake ground 4045 copra cake lumpy 2530 copra lumpy 22 copra meal 4045 page 2 of 7 scroll for
Copper ores an ore is a rock containing enough valuable mineral to make it worth extracting in the case of copper it is worth extracting when there is about 2 kg of copper per 1000 kg of ore 02 copper minerals are found in over one hundred varieties although only a few have been worked for copper on a large
Dec 31 2008 ppap production sample size thread starter stanley p start date dec 30 2008 s stanley p dec 30 2008 1 dec 30 2008 1 i hope this is an easy one i dont have a aiag ppap manual so im going off memory which isnt working so well we are requiring a supplier to make a ppap submission for an engineering change we have made the part is
Determining sample size how to make sure you get the correct sample size 7 min read finding the perfect sample size for statistically sound results is an age old problem here we shed light on some methods and tools for sample size
Feb 15 2021 cb fox date february 15 2021 copper sulfate which is used in electrorefining copper copper cathode is a form of copper that has a purity of 9995 in order to remove impurities from copper ore it undergoes two processes smelting and electrorefining the resulting nearly pure copper is an excellent conductor and is often used in electrical
Figure 23 sample weight 18 figure 31 the x or shewhart control chart 25 figure 41 summary of sample preparation procedures 29 figure 42 the jones riffle splitter 32 figure 43 an automated comminution system 37 figure 51 indicator mineral extraction flowsheet 66 tables 61 table 21 approximate sample size required for
Grade copper mineralization is from approximately 08–11 km west and aiken 1982 at bingham utah the greatest vertical extent of copper ore is approximately 14 km babcock and others 1995 formshape deposits are typically semicircular to elliptical in plan view areal dimensions for ore and alteration table 2 were
However the more the ore is finer size the less sample masse is required mineral processing sampling methods sampling can be done in a simple way which is collecting some portions of materiel from different locations or when the ore is transported in wagons or conveyor
If the appropriate sample size equals or exceeds your lot size you’ll inspect 100 percent of the order whereas for large lot sizes with higher aqls a larger sample size is often redundant that is you can get the same confidence in results from inspecting a smaller sample size which will be less time consuming and less
Indicate the sample size for estimating the average of the ﬁnite lot will be n l 5 n11nn 4 where n is the value computed from eq 1 eq 2oreq 3 this reduction in sample size is usually of little importance unless n is 10 or more of n 75 when the information on the standard deviation is limited a sample size larger than
Jul 22 2019 i am confused about the sample size of ppk calculation i check a lot of information on the internet and books but didn’t find out the definition of sample size for ppk could anyone tell me can i use 3032 as ppk sample size the total number for a lot is 1k2k thanks
Main copper minerals in the test sample quartz calcite illite chlorite and plagioclase were determined as the main gangue minerals of the sample the mesh of grind size of copper minerals was determined as 75 microns after examination of ground particles under microscope during the flotation tests the effects of type
Mar 24 2017 copper anything over 100 metres and 1 copper equivalent or better is considered to be highgrade for example serengeti resources announced 1196 metres of 09 copper
Oct 17 2019 the sample is sieved onsite using a 80 mesh sieve 178 micrometres using a stack of sieves with progressively finer mesh sizes this ensures that the finer clay and silt size particles are concentrated as this is the particle size range which contains the highest concentration of common indicator elements such as copper lead zinc and
Proportion of the sulphides from the ore leaving a more environmentally friendly reduced acid generation tailing a 10 kg test also provides a good gold head assay as the sample size is increased to 10 kg from the previous 250 g the test procedure involved grinding the ore
Sample size calculator terms confidence interval amp confidence level the confidence interval also called margin of error is the plusorminus figure usually reported in newspaper or television opinion poll results for example if you use a confidence interval of 4 and 47 percent of your sample picks an answer you can be sure that if you had asked the question of the entire relevant
Sep 13 2005 sample size will 1 for an individuals chart and 410 usually for an xbar chart no magic and it is not a real concern for making the control chart usable as for frequency again no calculations you sample frequently enough to spot change if the process can degrade in a hour then maybe sample
Sep 26 2019 once determined use the lot size and general inspection level to determine the samplesize code letter the following is an example of a samplesize code letters table from ansiasq z14 if your lot size is between 501 and 1200 and using general inspection level ii shortened example of table 1 – ansiasq z14 sample size code
Some general considerations during sample preparation are to minimize sample losses and to prevent contamination possible mechanisms for sample loss during preparation steps are discussed in section 1221 and the contamination of samples from sources in the laboratory is discussed in section
The bottom of the ore body sits roughly 1000 feet deep and measures to be roughly 6 acres in size eagle has two ore types massive and semimassive sulfide massive sulfide is about 65 percent nickel and 38 percent copper semimassive contains about 1 percent nickel and 1 percent
The copper anodes are then refined electrolytically to 999 purity copper melted under non oxidizing conditions is called oxygen free copper the most popular form of pure copper is the standard electrical wire grade of copper c11000 contains 9995 cu 003 o2 and less than 50 ppm metallic
The length in which the mineralization is found in the ore body horizontally 500 meters depth the depth in which the mineralization is found in the ore body vertically 200 meters width the width in which the mineralization is found in a drill hole 100
The ore sample indicating that th e majority of copper and cobalt dissolved when the ore samples were leached with 75gl sulphuric acid at 70 c figure 8 shows that the silicon and
The sample size required for this test is a minimum after drying procedure record all information on sfn 9987 or sfn 2455 weights are recorded to the nearest 01 g oven dry the sample according to nd t 255 at a temperature of 230 9 f 110 5 c weigh and record as original weight of
The student will analyze a sample of copper ore using atomic absorption spectrophotometry 2 the student will use the calibration curve method of analysis 3 the student will use the method of standard addition for this analysis 4 this method also depends on the fact that all of the sample is dissolved 5 a known and unknown are treated
These data are shown in table 2 the median size of the longest axis of alteration surrounding a porphyry copper deposit is 4–5 km while the median size area of alteration is 7–8 km2 table 2 vertical extent the vertical extent of ore is dependent upon the lower copper cutoff grade which will vary with the price of copper
This means that 957 of the copper present in the ore was recovered in the concentrate while the rest was lost in the tailings c the cu loss can be calculated by subtracting the cu recovery from 100 cu loss 100 – 957 43 this means that 43 of the copper present in the ore
Three major sample types are typically chosen samples are selected for initial reagent definition to achieve the desired mineral separation separation may be a simple bulk float iepyritic gold ores some copper ore with negligible pyrite or as is the case for polymetallic ores a complex three stage sequential separation