SPECIAL STORY 58 FEED & ADDITIVE MAGAZINE July 2022 Moisture changes during the conditioning process Conditioning and tempering of feed refers to the hydrothermal treatment of the materials by introducing steam before it enters the granulator, thereby improving the physical and chemical properties of the powdery material. The moisture content of the material after conditioning is reasonable between 14% and 15.5% in terms of moisture, because the processing quality of the pellet feed produced and processed under this condition is good; the moisture content of the finished product is easy to meet the standards requirements. However, in dry and hot seasons, it is difficult to archive 14% moisture content after conditioner. The conditioning moisture can be increased by adjusting the conditioning time and the amount of steam, where Adiveter’s technicians have a lot of experience on it. Moisture changes and control measures in the granulation process During pelleting, the temperature feed increases by 8 ºC to 15 ºC, these values could consider reasonable, due the friction and extrusion, and the moisture decrees around 0.5%. Reasonable compression ratio is important, having more compression you have more friction resistance during the granulation process, and that affects negatively for pellet quality and moisture content. Moisture change and control measures in cooling process with Adiveter 4.0 (Cooler Plus) The function of the cooler is to cool the hot pellets from the pellet granulator, generally no more than 5 ºC of ambient temperature. Studies have shown that in the cooler, the temperature of the pellets generally decreases by 11 ºC, and the moisture of the pellets decreases by 1%. The key parameter for particle cooling control is the Cooler Plus. With Cooler Plus we have a real time monitoring, with the control of some parameters, that helps not to lose between 0,15 pp to 0,4 pp, depending on the season. Having an excessive cooling air volume and long cooling time will cause excessive moisture loss in the product, which will affect the efficiency of the enterprise, and in the quality of final feed, having less PDI also. Today, when the price of raw material is soaring and the market competition is very fierce, feed enterprises are required to comprehensively control various factors, according to different situations in the whole process of production, so that the final moisture content of the product can reach the expected goal of the producer, and ensure the quality of pellet feed. The economic benefits of the enterprise make it occupy a favorable position in the fierce market competition. Footnotes 1The smaller the particle size we want the higher moisture loss will be. A smaller particle size will allow the flour to take a higher temperature and better absorb moisture, key points to accelerate gelatinization of the starch. 2In a roller mill and counter-hob mill, the moisture loss is significantly lower than a hammer mill. 3Reasonable preparation of the suction air volumen during the grinding.
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