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    Quality control in the process of feed processing

    The processing of compound feed is the key to ensure the performance of feed products and the economic efficiency of factories. With advanced equipment and good processing technology, it not only saves manpower and material resources, but also gains excellent products. Therefore, monitoring the quality of each process in the process of production plays an important role in controlling the quality of the feed products. In addition, in strict accordance with the requirements of feed formula to measure the proportioning and ensure the normal process of the whole process, it is the focus of the quality control of the feed production process. The following is an overview of the quality control of each processing process, which aims to provide theoretical reference for its large-scale and specialized production.

    1 quality control of raw material cleaning

    The main raw material and auxiliary material should be cleaning iron removal treatment, organic impurities should not exceed 50mg/kg, the diameter is not greater than 10mm, the magnetic impurity shall not exceed 50mg/kg, the diameter is less than 2mm, and in order to ensure the safety distance of 30 40mm should be configured to remove impurities in the grid sieve feeding pit, before the feed raw materials crushing or powder granulation, should also be getting rid of impurity iron process. In addition, the staff should regularly check the working status of cleaning equipment and magnetic separation equipment, see if there is any damage and hole blockage, and regularly clean up all kinds of residual materials for mechanical equipment.

    Quality control of 2 raw material comminution

    The crushing process of feed mainly controls the particle size and its uniformity. Too large or too small feed grain can lead to segregation of feed and destroy the uniformity of feed products (Zhao Yilao et al. 2005). Each animal has a suitable range of particle size, such as piglets, feed and feed, broiler pre laying reserve chicken fattening pig (early) feed 99% through 2.8mm braided sieve, there shall be no whole grain, 1.4mm woven on the screen is not greater than 15%. Machine operators should always observe the grinder's ability and mill discharge logistics size, crushing capacity (abnormal small mill current) one of the reasons is that the mill screen has been beaten leakage, particle is too large, if found in whole grain or grain rough phenomenon, should be timely stop check screen with a grinder the formation of dislocation and no loopholes or screen side baffles. Secondly, we should check the heating phenomenon frequently. If there is a fever phenomenon, we should exclude the possible phenomenon of grinder blockage in time and observe whether the current of the pulverizer is overload. Finally, should regularly check the hammer is worn, each class has no loopholes, check the screen leaks and dislocation.

    Quality control of 3 ingredients

    3.1 raw material metering and batching

    According to the requirements of production process of feed, there are two main ways: one is measurement of the ingredients, not crushed raw material batching, this way is not before the raw materials were pulverized, measured in accordance with the formula requirements, then the measured with good raw material crushing, mixing and granulating operation etc.. The advantage of this process is that it is more convenient to smash. The same kind of raw material only needs to be stored in one place, and the storage space of feed is saved more. The disadvantage is that the error between the formulated feed products and the formula is relatively large. The higher the moisture content of the raw material is, the more weightlessness it is after crushing. It not only affects the absolute proportion of its own formula, but also affects the relative proportion of the whole proportion and other raw materials. The best way to overcome this shortcoming is to increase the insurance coefficient of feed measurement. The loss of general processing can be considered as 5% to 10%. The higher the moisture is, the larger the feed size is, the higher the proportion of insurance can be increased (Chen Guangdong, 2015). The second way of batching is to crush raw materials and measure ingredients. First, the raw materials are crushed separately and stored separately according to the unified specifications. Then, according to the requirements of the formula, the raw materials are measured and matched with the crushed raw materials, and then directly mixed and granulated. The process error is relatively small, but the increase of storage space, a material at least two places in the feed production scale are generally used in this way, a more accurate, with relatively small error, according to the requirements of measurement formula, easy to reach the quality requirements of nutrition formula.

    3.2 measurement of trace elements

    With the measurement of trace components in complex and error prone, in this kind of feed ingredients include vitamins, trace elements, non nutritive additives, calcium, phosphorus and salt, with the measurement processing this kind of composition should be in accordance with the amount of mixing mixer again, calculate the trace amount of feed should be added then, divided into several parts separately. If all the vitamin added together as a part of trace elements, calcium, phosphorus and salt together as a part of non nutritive additives together as a part of, or only concentrated into two parts, one part is the mineral feed, the other part is the other trace feed ingredients including the synthesis of amino acids. Ready mixed batch in accordance with the requirements of each trace components have been prepared and recorded, in order to reduce the loss of trace elements, mineral elements part finally join the mixing machine, while adding other trace elements and not mineral elements, the best use of energy feed or protein feed from mixing machine, not to direct contact mixed with the wall, with the added part of feed premix mixing machine, and then boot mixed.

    4 mixed quality control

    The quality control of feed mixing is closely related to the correct operation of mixing process. We should pay attention to the order of raw materials in production. Generally, we should first invest a large amount of raw materials. The less raw materials should be in the rear.


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