This MCF investigation established the relationship between actual measurements and reporting against measurement protocols Such measurements include tonnage measurements based on surveyors calculated tonnage and a system of truck count tonnage referred as spot tonnage as well as sampling and assay standards practiced on the mine

About Hematite iron ore 1 cubic meter of Hematite iron ore weighs 5 150 kilograms kg 1 cubic foot of Hematite iron ore weighs 321 504 pounds lbs Hematite iron ore weighs 5 15 gram per cubic centimeter or 5 150 kilogram per cubic meter i e density of hematite iron ore is equal to 5 150 kg m³ In Imperial or US customary measurement system the density is equal to 321 504 pound

 · How to Calculate Sample Size Scientific studies often rely on surveys distributed among a sample of some total population Your sample will need to include a certain number of people however if you want it to accurately reflect the

Sample size determination is the act of choosing the number of observations or replicates to include in a statistical sample The sample size is an important feature of any empirical study in which the goal is to make inferences about a population from a sample In practice the sample size used in a study is usually determined based on the cost time or convenience of collecting the data and

SAMPLE SIZE AND MEANINGFUL GOLD ANALYSIS By I I EDWARD CIJIF l ON RALPH E HuNTER FREDERICK J SwANSON and R LAWRENCE PHILLIPS ABSTRACT A sample of geologic material is of adequate size for gold nnalysis if it is large enough to insure tbllit the analysis will have n specified degree of precisio·n It can be shown ma the

Where U1 is the utility of sending ore to process 1 and U2 is the utility of sending ore to process 2 Utility is defined as the value economic or otherwise of selecting a process This means that if U1 x is greater than U2 x when x is greater than the cut off grade xc then that material with x greater than xc should be sent to process

SAMPLE SIZE AND MEANINGFUL GOLD ANALYSIS By I I EDWARD CIJIF l ON RALPH E HuNTER FREDERICK J SwANSON and R LAWRENCE PHILLIPS ABSTRACT A sample of geologic material is of adequate size for gold nnalysis if it is large enough to insure tbllit the analysis will have n specified degree of precisio·n It can be shown ma the

If the sample size calculator says you need more respondents we can help Tell us about your population and we ll find the right people to take your surveys With millions of qualified respondents SurveyMonkey Audience makes it easy to get survey responses from people around the world instantly from almost anyone

where N is the population size r is the fraction of responses that you are interested in and Z c 100 is the critical value for the confidence level c If you d like to see how we perform the calculation view the page source This calculation is based on the Normal distribution and assumes you have more than about 30 samples About Response distribution If you ask a random sample of 10

 · Tonnage In reference to air conditioning a ton measures how much heat removed by the system would be needed to melt 2 000 pounds or one ton of ice in a 24 hour period The result is then expressed in Btu per hour According to the standard calculation it takes 288 000 Btu to melt a ton of ice in 24 hours or 12 000 Btu per hour

Treating the falling stream of ore as a ribbon they cut sample sections directly across its entire width these portions varying in shape and size with the mechanism employed Of the many types that have been invented and patented only three have come into general use and Fig 7 show s the shapes of the sample sections taken by these

A representative sample can be obtained by following the standard procedures detailed in the latest edition of AASHTO T2 and ITM 207 Method of Sampling Stockpile Aggregate SIZE OF ORIGINAL SAMPLES The key to any sample program is to obtain a representative sample A standard sampling method must be followed to obtain uniform samples

Sample size is very important to ensure that an experiment yields statistically significant results If the sample size is too small the results will not give actionable results because the variation will not be large enough to conclude that the result wasn t due to chance If a researcher uses too many

Iron Ore Alumina Differential per 1 with 2 5 4 60 63 5 Fe Fines IOALE00 IOALE03 Assessment Daily PMA1105 1 alumina within 2 5 4 range for fines with 60 63 5 Fe dmt Iron Ore Alumina Differential per 1 with

The sample size of a study refers to the number of data points collected A well designed study with an adequate sample size will usually have some predictive power because the researchers collected enough data points to make reasonable assumptions about the target population based on their sample However a study

1 Sample Normal 1 Sample Binomial Calculate Sample Size Needed to Compare 2 Means 2 Sample 2 Sided Equality This calculator is useful for tests concerning whether the means of two groups are different Suppose the two groups are A and B and we collect a sample from both groups i e we have two samples We perform a two sample test

In statistics quality assurance and survey methodology sampling is the selection of a subset a statistical sample of individuals from within a statistical population to estimate characteristics of the whole population Statisticians attempt for the samples to represent the population in question Two advantages of sampling are lower cost and faster data collection than measuring the

About Hematite iron ore 1 cubic meter of Hematite iron ore weighs 5 150 kilograms kg 1 cubic foot of Hematite iron ore weighs 321 504 pounds lbs Hematite iron ore weighs 5 15 gram per cubic centimeter or 5 150 kilogram per cubic meter i e density of hematite iron ore is equal to 5 150 kg m³ In Imperial or US customary measurement system the density is equal to 321 504 pound

Gy P M 1979 Sampling of Particulate Materials Theory and Practice Elsevier Wills B A 1992 Mineral Processing Technology 5th edition Pergamon Press pg 79 Use This method is a general purpose calculation to determine the minimum size of sample needed to

Sampling errors occur as a result of calculating the estimate estimated mean total proportion etc based on a sample rather than the entire population This is due to the fact that the estimated figure obtained sample size 2 the corresponding percentage is 43 for n 3 90 for n 7 and so on Sampling Techniques 3

A representative sample can be obtained by following the standard procedures detailed in the latest edition of AASHTO T2 and ITM 207 Method of Sampling Stockpile Aggregate SIZE OF ORIGINAL SAMPLES The key to any sample program is to obtain a representative sample A standard sampling method must be followed to obtain uniform samples

A sample tree experiment involves splitting at different top sizes followed by comminution and assaying5 Figure 1 shows the sample tree flowsheet Two ores were evaluated via this sampling technique The first sample was a low grade gold ore about 5 g t gold mill feed sample from a South African gold mine The particle size was 95 12 mm

How do I calculate effect size There are different ways to calculate effect size depending on the evaluation design you use Generally effect size is calculated by taking the difference between the two groups e g the mean of treatment group minus the mean of the control group and dividing it by the standard deviation of one of the groups For example in an evaluation with a treatment

3 Power based sample size calculations We have seen above that precision based sample size calculations relate to estimation Power based sample size calculations on the other hand relate to hypothesis testing In this handout the formulae for power based sample size calculations will not be derived just presented Definitions

Iron Ore Alumina Differential per 1 with 2 5 4 60 63 5 Fe Fines IOALE00 IOALE03 Assessment Daily PMA1105 1 alumina within 2 5 4 range for fines with 60 63 5 Fe dmt Iron Ore Alumina Differential per 1 with

HGT Gyratory Crusher Per Ton Power Consumption Of Cement Mill Calculation Cement USGS Mineral Resources Program per ton power consumption of cement mill calculation shutdowns so as to provide continuity of clinker feed to the finish cement mill these shutdowns can electricity consumption per ton of cement product than wet process plants have higher electrical power and general energy

The tonnage factor provides the mechanism for the conversion from volume of ore to weight of ore In the English system the tonnage factor is normally expressed as cubic feet per ton of ore In the metric system the tonnage factor is the specific gravity of the ore

calculation of a factor called the liberation factor and some of the most preeminent books on the subject provide rules of thumb and examples for its calculation from the gold liberation size Since the gold in his case is almost entirely liberated when the ore is pulverized down to a nominal size of 40 microns and the cuttings have a

Calculation of Ore Tonnage Grade from Drill hole Samples Previous Next was calculated by the method just outlined and the results of the calculation of tonnage and grade of the ore content are shown in the accompanying table of calculations Sampling in gold mines is generally somewhat different from the sampling of large masses of

where N is the population size r is the fraction of responses that you are interested in and Z c 100 is the critical value for the confidence level c If you d like to see how we perform the calculation view the page source This calculation is based on the Normal distribution and assumes you have more than about 30 samples About Response distribution If you ask a random sample of 10

Copper ore 120 150 30 44 20 D37 Dolomite lumpy 80 100 30 44 22 D36 Gravel dry sharp 90 100 30 44 15 17 D37 Lignite air dried 45 55 30 44 D35 Rock soft excavated with shovel 100 110 30 44 22 D36 Salt common dry fine 70 80 25 11 D26TUW Sandstone broken 85 90 30 44 D37 Wood chips 10 30 45 27 E45WY

These are used to compute the production of concentrate in a mill or in a particular circuit The formulas are based on assays of samples and the results of the calculations are generally accurate as accurate as the sampling assaying and crude ore or other tonnage on

Following is a sample calculation in which round figures were used for grades and lengths of samples for the sake of simplicity Computation of Tonnage and Grade of Ore by Blocks Developed ore usually is calculated first for each of the different areas or blocks bounded

Sample Size Calculator Terms Confidence Interval Confidence Level The confidence interval also called margin of error is the plus or minus 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

Copper ore 120 150 30 44 20 D37 Dolomite lumpy 80 100 30 44 22 D36 Gravel dry sharp 90 100 30 44 15 17 D37 Lignite air dried 45 55 30 44 D35 Rock soft excavated with shovel 100 110 30 44 22 D36 Salt common dry fine 70 80 25 11 D26TUW Sandstone broken 85 90 30 44 D37 Wood chips 10 30 45 27 E45WY

Gy P M 1979 Sampling of Particulate Materials Theory and Practice Elsevier Wills B A 1992 Mineral Processing Technology 5th edition Pergamon Press pg 79 Use This method is a general purpose calculation to determine the minimum size of sample needed to

To calculate the grade of copper for the sample geologists use the equation amount of copper metal amount of copper ore rock 100 2 If a deposit area has 200lbs of copper in 10 000lbs of ore rock what is the grade 200 10000 100 2 3 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