Mineral processing index

Processing ore grade (g / t) = the amount of gold-containing ore treated (g) / ore processing (tons)

 

Concentrate grade:

It refers to the gold content per ton of concentrate, which is an indicator reflecting the quality of concentrate. The calculation formula is:

Concentrate grade ( g / ton ) = concentrate gold content ( g ) / concentrate quantity ( ton )

 

Concentrate yield:

Refers to the percentage of the amount of ore concentrate output accounted for, it is an indicator of the quality of the beneficiation plant. The calculation formula is:

Concentrate yield ( % ) = quantity of concentrate ( tons ) / quantity of ore ( tons ) × 100 %

 

Tailings grade:

Refers to the gold content in the tailings discarded by the ore dressing, the average gold content per ton of tailings. It is an indicator of the extent of metal loss during the beneficiation process. The calculation formula is:

Tailings grade ( g / ton ) = tailings gold content ( g ) / tailings quantity ( tons )

Tailings ( tons ) = treated raw ore ( tonnes ) - concentrate ( tonnes )

 

Mineral recovery rate:

Refers to the gold content of the final product obtained by various mineral processing methods.

The percentage of the amount. Calculated according to theoretical and actual recovery rates.

Mineral processing theoretical recovery rate ( % ) = concentrate grade × ( original grade - tailing grade ) / ( original grade × ( concentrate grade - tailing grade )) × 100 %

= theoretical amount of metal recovered ( g ) / amount of ore metal treated ( g ) × 100 %

Actual recovery rate of mineral processing ( % ) = gold content of gold concentrate ( g ) / gold content of raw ore ( g ) × 100 %

( flotation recovery rate )

 

Leach rate:

It refers to the amount of metal that has been dissolved by gold in the leaching operation as a percentage of the amount of cyanogen ore metal. The calculation formula is:

Leaching rate = amount of metal dissolved in gold ( g ) / amount of cyanogen ore metal ( g ) × 100 %

= ( amount of cyanogen metal ( g ) - amount of leached metal ( g )) / amount of cyanogen metal ( g ) × 100 %

 

Washing rate:

It refers to the percentage of gold in the precious liquid as a percentage of the amount of metal leached out of the dissolved gold. The calculation formula is:

Washing rate ( % )= gold content in precious liquid ( g )/ metal amount of leached gold ( g ) × 100 %

= ( Cyclic ore metal amount ( g ) - leaching metal amount ( g ) - Discharge metal amount ( g )) / ( Cyanogen metal amount ( g ) - Dip metal amount ( g )) × 100 %

 

Replacement rate:

It refers to the percentage of the gold content of the gold sludge precipitated by the displacement precipitation as a percentage of the gold content of the noble liquid. The calculation formula is:

Replacement rate ( % ) = gold content ( g ) / gold content ( g ) × 100 %

 

Cyanide recovery rate:

Refers to the gold content of cyanide gold mud as a percentage of the gold content of cyanogen ore. The calculation formula is:

Cyanide recovery rate ( % ) = gold mud gold content ( g ) / cyanogen ore gold content ( g ) × 100 %

= leaching rate ( % ) × washing rate ( % ) × replacement rate ( % )

 

Cyanide gold mud smelting recovery rate:

It refers to the percentage of the combined gold content after smelting to the amount of cyanide gold mud. The calculation formula is:

Smelting recovery rate = total gold content ( g ) / gold content ( g ) × 100 %

 

Cyanide smelting recovery rate:

It refers to the percentage of the total gold content of the final product of the cyanide plant as a percentage of the gold content of the cyanogen. The calculation formula is:

Cyanide smelting recovery rate = total gold content ( g ) / cyanogen content ( g ) × 100 %

= cyanidation recovery rate ( % ) × gold mud smelting recovery rate ( % )

= leaching rate ( % ) × washing rate ( % ) × replacement rate ( % ) × gold mud smelting recovery rate

 

Total recovery rate of metallurgy:

It refers to the sum of the total amount of metal and the amount of ore metal in the final qualified products produced by the processing and processing workshop. The calculation formula is:

Separation rate of the smelter ( % ) = sum of metal amounts of various final products ( g ) / amount of ore metal ( g ) × 100 %

 

Dressing ratio:

It refers to the ratio of raw ore to selected concentrate, that is, the tonnage of raw ore required for each ton of gold concentrate selected, expressed in multiples:

Dressing ratio ( times ) = raw ore processing capacity ( tons ) / concentrate volume ( tons )

 

Grinding machine utilization factor:

It refers to the newly qualified particle size of the mine treated by the grinding machine per cubic meter of effective volume per unit time ( hours ) . The calculation formula is:

Grinding machine utilization factor ( ton / m3 . Taiwan ) = final new qualified particle size output rate ( % ) × raw ore processing capacity ( ton ) / ( each grinding machine volume ( cubic meters ) × operating hours And )

 

Grinder operating rate:

Refers to the actual working time of the grinding machine as a percentage of the calendar time. The calculation formula is:

Mill operating rate ( % ) = sum of actual working hours of each grinder / sum of grinder calendar table hours × 100 %

 

Average daily throughput:

The average daily processing volume refers to the average amount of raw ore processed by each beneficiation working day. The calculation formula is:

Average daily processing capacity ( ton / day ) = raw ore processing capacity ( tons ) / days of planting operations ( days )

The number of days of planting work should be determined by whether the grinding machine is started or not, as long as it is started for one day, regardless of the starting time of the day.

 

Physical labor productivity of all staff in the dressing workshop:

It refers to the average amount of raw ore processed by each employee of the mine beneficiation during the reporting period. The calculation formula is:

Physical labor productivity of all staff in the dressing workshop ( ton / person ) = raw ore processing capacity ( ton ) / average number of employees in the metallurgical workshop ( person )

 

Physical labor productivity of workers in the dressing workshop:

It refers to the average amount of raw ore processed by each worker in the dressing plant during the reporting period. The calculation formula is:

Physical labor productivity of workers in the dressing workshop ( tons / person ) = raw ore processing capacity ( tons ) / average number of workers in the dressing workshop ( person )

 

Cyanide material consumption:

It refers to the amount of main materials consumed per ton of raw ore or gold concentrate in the process of beneficiation and cyanidation. The calculation formula is:

Material consumption ( consumption unit / ton ) = total consumption of a certain material ( consumption unit ) / raw ore processing capacity ( ton )

Or = total amount of material consumed ( consumption unit ) / gold concentrate

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