Beneficiation plant work system, generally use continuous duty, namely the annual 365d, 3 shifts a day, each class 8h. When the crushing and screening workshop is located in the mine, its working system should be consistent with the mine working system. Intermittent work system The number of working days per year is equal to 365d minus the holiday of the year. The number of classes per day varies from 1 class to 2 classes or 3 classes, and each class works 8 hours.
The annual operating rate of major equipment refers to the ratio of the actual operating hours of the equipment throughout the year to the calendar hours of the year. The annual operating rate of equipment is a measure of the length of equipment operation time and an important factor affecting production capacity. The annual operating rate values ​​of the equipment in the following table are based on the statistics of many years of production and operation time of many concentrating plants in China.
It depends on the equipment level, production management level and external transportation, power supply, water supply, maintenance capabilities and other conditions.
Note: 1. The working system of the crushing workshop is generally consistent with the mining and raw ore transportation. The working system of the concentrate dewatering workshop is generally consistent with the sorting workshop.
2. Before the middle crusher is located in the middle storage bin, the operation rate is the same as coarse crushing; after the intermediate storage bin, the operation rate is the same as the fine crush.
3. The small ore dressing plant has a large capacity for self-built diesel power stations or equipment, and the amount of ore supply is small, and the equipment operation time should be appropriately shortened.
When designing the processing amount hours, depending on the workshop or daily processing amount and calculating the number of work, i.e., when q = q in / (tη) or q = q day / t 1
Wherein when Q, q in, q days - hours, respectively Drag amount of processing in the processing amount, the amount of daily treatment;
T-year calendar hours, t=8760;
t 1 — Equipment working hours η—The annual operating rate of the equipment (in decimal), as shown in the table below.
The processing capacity of the ore dressing generally refers to the production capacity of the main plant. Non-ferrous metal ore concentrator production capacity is about to happen several ore processing volume, ferrous metal ore concentrator production capacity is the quantity of ore processed.
 Working system and equipment annual operating rate of each workshop in the concentrator |
Workshop name | Working system | Equipment annual operating rate /% | Driving hours throughout the year | Operating rate conversion equivalent |
Work system | Working days per year | Equipment shipment | Equipment transportation | Class equipment |
Number of days | Transfer number | Turn hours |
　 | Intermittent | 306 | 24.45 | 2142 | 306 | 1 | 7 |
Broken, washed | 41.92 | 3672 | 306 | 2 | 6 |
workshop | 52.4~62.88 | 4590~5508 | 306 | 3 | 5~6 |
　 | continuous | 365 | 52.7~67.8 | 4620~5940 | 330 | 2~3 | 5~7 |
Self-grinding and selection | continuous | 365 | 85~90.4 | 7440~7920 | 310~330 | 3 | 8 |
Other workshop  |
Ball grinding and selection | continuous | 365 | 90.4~92 | 7920~8060 | 330~336 | 3 | 8 |
Other workshop |
Concentrate | continuous | 365 | 60.3~90.4 | 5280~7920 | 330 | 2~3 | 8 |
| Water workshop |
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