| 摘要 |
The process for producing a finished product, e.g. gravel/sand from a raw-material product, enriched with harmful substances or surplus constituent parts, provides that a sample is taken 2 from the finished-product stream 9. In a downstream separating unit 3, the sample is separated into various fractions 10, 11, 12 and the fine-grain portion in each case is measured in measuring units 4, 4'. Pulses are transmitted from the measuring units 4, 4' to an evaluation unit 5 which compares the measured values with the predetermined fine-grain-portion desired value. If there are deviations, positive or negative pulses are given out to an adjusting unit 8. The adjusting part 8 can influence the supply 14 of the raw product, or the treatment unit 1. This is carried out until the set fine-grain-portion desired value corresponds with the fine-grain portion of the fractions 11, 12 in the measuring unit 4, 4'. <IMAGE> |
