Common knowledge of mineral processing

Common knowledge of mineral processing

1. What is productive rate?

In the dressing process, the weight of a product and the percentage of raw ore weight, known as the productive rate.

The production rate of each product is calculated as follows:

Concentrate mineral rate 1=Q1/Q 100%
Medium mineral rate 2=Q2/Q 100%
Tail mineral rate 3=Q3/Q 100%

Where Q -- raw ore weight, t;  Q1 -- concentrate weight,t;
T Q2 -- medium ore weight, t;   Q3 -- tailings weight, t.

What is the recovery rate?
The concentration recovery is the percentage of the amount of metal (useful component) in the concentrate to the amount of metal (useful component) in the raw ore.This is an important mineral processing index, which reflects the degree of metal recovery, mineral processing technology and mineral processing quality.The recovery of ore dressing should be improved as much as possible on the premise of ensuring concentrate grade.The calculation method is as follows:

3. What is the Ore dressing ratio?
Ore dressing ratio refers to the t number of raw ore required for each 1t of concentrate.Usually expressed in multiples.The calculation formula is as follows:
Ore dressing ratio = raw ore handling capacity (t)/ concentrate quantity (t) (times)
If the weight of raw ore processed by a concentrator is 500t every day and night and the weight of concentrate obtained is 30t, then the concentration ratio is 500/3=16.7.

4.What is the high-grade ore ratio?
The high-grade ore ratio is the ratio of the grade of the useful minerals in the concentrate to the grade of the useful minerals in the raw ore, that is, the concentrate grade is several times of the grade of the raw ore.The higher the ratio of enrichment and recovery, the better the efficiency.The formula for calculating the enrichment ratio is as follows:
High-grade ore ratio= concentrate grade/raw ore grade (times)
The high-grade oreratio, sometimes called the enrichment ratio, is often denoted by i.
If the grade of copper in the raw ore of a certain concentrator is 1.0%, and the grade of copper in the concentrate is 15.0%, the ore enrichment ratio is I =15.0%/1.0%=15.


5. What is raw ore handling capacity?
Raw ore handling capacity refers to the amount of raw ore to be processed in the dressing plant, the measurement of raw ore handling capacity in the dressing plant, commonly used mechanical belt scale, electronic belt scale.Some mill with scraper on the belt scale regularly scraping a certain amount of ore, in the weighing calculation.Some concentrators have pre-selected, washing, desliming and other processes before the separation, so in the calculation of raw ore processing capacity, should include pre-selected waste rock volume, qualified ore volume and desliming overflow flow.

6. What is the daily volume of mineral processing?

The amount of raw ore processed in each dressing working day is called the daily processing amount of dressing, which is an index reflecting the processing capacity of the dressing plant.The calculation formula is as follows:

Daily processing capacity (t/d)= raw ore processing capacity (t)/ processing day and night (t)

7. What is the physical labor productivity of all employees in the selection plant?
The term "physical labor productivity of all employees in a concentrator" refers to the raw ore quantity handled by each worker of the concentrator on average during the reporting period.It is a comprehensive index reflecting the degree of dressing machinery and equipment and labor efficiency.The calculation method is as follows:

T/person • month (or season, year) = raw ore processing capacity (t)/ number of workers in the plant

8. What is the physical labor productivity of the concentrator?
The physical labor productivity of the concentrator refers to the raw ore quantity processed by the average production worker in the concentrator during the reporting period.It is a comprehensive index reflecting the equipment level of concentrator and the labor productivity of concentrator.The calculation method is as follows:
Physical labor productivity of mill workers t/ person • month (or season, year)= raw ore processing capacity (t)/ number of mill workers

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