GB/T 34164-2017Method for evaluation of flotation technological performance in coal preparation plant (English PDF)

3.1

flotation coal quantity efficiency is used to assess the effect of flotation process between different coal. Calculation of flotation coal quantity efficiency see formula (1), meter

The result is rounded to 2 decimal places.

etaif =

gammaj

gamma'j

× 100 (1)

In the formula.

etaif --- flotation coal quantity efficiency,%;

gammaj --- actual flotation coal yield,%;

gamma'j --- coal ash at the same time, the theoretical flotation yield of coal,%.

3.2

theoretical flotation coal yield according to GB/T 30046.2 drawn by the coal yield - ash curve to determine.

3.3

flotation perfect indicators used to assess the same coal in different process conditions, the degree of improvement. Calculation of flotation perfect indicators see

Equation (2), the calculation results rounded to two decimal places.

etaomegaf =

gammaj

100-Ay

Ay-Aj

Ay

× 100 (2)

In the formula.

etaomegaf --- flotation perfect index,%;

Ay --- calculated feed ash,%;

Aj --- flotation of coal ash,%.

3.4

When the flotation process coal flotation process using flotation of the filtrate back to the flotation process equipment, the coal slurry is not containing flotation flotation feed,

Flotation of coal for the filter and other equipment after dehydration products.

When using the filtrate does not return flotation equipment flow, the flotation of coal flotation machine foam products.