Mineral processing index
Mineral processing index Processing ore grade (g / t) = the amount of gold-containing ore treated (g) / ore processing (tons) Concentrate grade: 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 concentrate produced as a percentage of the original ore, which is an indicator of the quality of the concentrator. The calculation formula is: Concentrate yield (%) = concentrate quantity (ton) / raw ore quantity (ton) × 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 formula is: tailings grade (g / ton) = tailings gold content (g) / tailings quantity (tons) Tailings (tons) = treated raw ore (tons) - concentrate (tons) 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 theory recovery rate (%) = concentrate grade × (original grade - tailing grade) / (original grade × (concentrate grade - tailing grade)) × 100% = theoretically recovered metal amount (g) / treated ore metal amount (g) × 100% Actual recovery rate of mineral processing (%) = gold content of gold concentrate (g) / gold content of raw ore (g) × 100% (flotation recovery rate) Leaching rate: refers to the percentage of metal that has dissolved gold by 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 metal (g) × 100% =(Cyanogen ore metal amount (g) - leaching slag metal amount (g)) / cyanogen ore metal amount (g) × 100% Washing rate: refers to the percentage of gold in the precious liquid as a percentage of the amount of metal leached into the dissolved gold. The calculation formula is: washing rate (%) = gold content of precious liquid (g) / amount of metal leached gold (g) × 100% =(Cyanide ore metal amount (g) - leaching slag metal amount (g) - Discharge metal amount (g)) / (Cyanogen ore metal amount (g) - leaching slag metal amount (g)) × 100% Displacement rate: refers to the percentage of the gold content of the gold sludge precipitated by displacement of the precipitate to the gold content of the noble liquid. The calculation formula is: Replacement rate (%) = gold mud gold content (g) / precious liquid gold content (g) × 100% Cyanide recovery rate: refers to the percentage of gold contained in cyanide gold mud as a percentage of gold content in 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: refers to the percentage of combined gold content in smelting after accounting for cyanide gold mud. The calculation formula is: Smelting recovery rate = total gold content (g) / gold content (g) × 100% Cyanide smelting recovery rate: 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 gold 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 smelting and smelting: 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: The recovery rate of the smelting plant (%) = the sum of the metal amounts of various final products (g) / the amount of ore metal (g) × 100% Mineral processing ratio: refers to the ratio of raw ore processing to the amount of concentrate selected, 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: 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 coefficient (ton / cubic meter. Taiwan) = final new qualified particle size output rate (%) × raw ore processing capacity (ton) / (each grinding machine volume (cubic meters) × operating hours with) Grinding machine 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 (%) = the sum of the actual working hours of each grinding machine / the sum of the grinding machine calendar work hours × 100% Average daily processing capacity: 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 (ton) / number of days of factory operation (day) 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. The physical labor productivity of all the staff in the dressing workshop: refers to the average amount of raw ore processed by each employee of the mine dressing 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: refers to the 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: 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 consumption of a certain material (consumption unit) / gold concentrate The amount of ore recovery refers to the percentage of the amount of metal or useful component in the concentrate to the amount of metal in the ore. This is an important beneficiation index, which reflects the degree of metal recovery, the level of mineral processing technology and the quality of mineral processing. The ore dressing process should maximize the ore recovery rate under the premise of ensuring the concentrate grade. Its calculation method is as follows: Actual recovery rate Actual concentrate quantity (tons) × concentrate grade = ×100% (1-2) Raw ore processing capacity (ton) × original ore grade β (α ?Cθ) Theoretical recovery rate = --×100% (1-3) α (β -θ) In the production process of the plant, each production class needs to sample and test the ore grade (α), concentrate grade (β) and tailings grade (θ). At this time, the theoretical recovery rate can be calculated from the formula (1-3). Theoretical recovery of copper concentrates as described above in Example 1: β(α -θ) Theoretical recovery of copper concentrate ε K = --×100% α(β-θ) 22. 18×(1.23-0.04) = ×100% 1.23×(22.18-0.04) = 96.92% The mineral processing technical supervision department generally prepares the actual metal balance table through the calculation of the actual recovery rate. The theoretical metal balance table is compiled by the calculation of the theoretical recovery rate. The comparative analysis of the two can reveal the institutional loss of the beneficiation process, identify the abnormal conditions in the mineral processing work and the errors in sampling, measurement, analysis and measurement. Generally, the theoretical recovery rate is higher than the actual recovery rate, but the two cannot be too different. Generally, a single metal flotation plant does not allow a difference of 1%. If this number is exceeded, it indicates that the metal loss is serious during the beneficiation process. 1. Security Three Wheel Electric Vehicle,Electric Tricycle Bikes,Hybrid Electric Tricycle,No Roof Electric Car FengXian Enland International Trading Co.,LTD , https://www.jsenland.com
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