In order to ensure the representativeness of the sample, the more samples are taken out, the better, but such results are uneconomical and unnecessary. In actual work, always determine the minimum sample quality in a representative beneficiation , what is the sampling, what is the sample, how to determine the minimum mass of the sample. There are many factors affecting the quality of the smallest sample, mainly the maximum block size of the material, the mineral inlay characteristics, the content of valuable components in the material, the difference in the density of each mineral composition, and the allowable error. Currently, the following empirical formula is used to determine the minimum mass of the sample: Where Q is the minimum mass necessary to ensure the representativeness of the sample, in kilograms; D——the particle size of the largest nugget (granule) in the sample, in millimeters; Coefficient K-- properties associated with the ore, in addition to the noble metal, usually between 0.02 to 0.5, most commonly from 0.1 to 0.2. If the sampling method is correct and the sampling system is reasonable, the minimum mass of the sample calculated according to formula (10-1) can represent the nature of the whole raw material. The amount of sample for chemical analysis is generally several grams to one kilogram, and the amount of sample for the ore dressing test requires several kilograms to several tons.
CNC Laser Engraving Machine is one type of Co2 CNC Laser Engraving Machine which is mainly used for all type of images ,letters ,characters marking on the surface of most of non metal material .Machine normally choose 60-80W laser tube which has very thin laser beam for the finest engraving quality .Meanwhile ,when Laser set 100% output ,it could also use to do cutting on material such as Acrylic ,clothes ,wood ,plastic etc .
Laser Engraving Machine Co2,Laser Engraving Machine For Cutting,Cnc Laser Engraving Machine,Co2 Laser Cutting Machine Jinan Rapid CNC Machinery Co.,LTD , https://www.gildemeistercnc.com
What is sampling in the ore dressing and how to determine the minimum mass of the sample
Sampling is the process of taking a small amount of representative material from a large batch of materials in a certain way. The part of the material taken out is called a sample (if the sum of several parts is called an average sample).