There are many factors affecting the quality of the material of the teaching material, among which the formulation factor is dominant; in the production process, the granulation section is more affected. Some small and medium-sized feed mills are inaccurate in the selection of ring mold parameters at the beginning of the production of the teaching material, which often results in excessive or excessive powder, which not only causes 10,000 yuan of mold loss, but also causes a certain market price. The negative impact. At present, the requirements for the ring mode parameters are: φ2.0-3.0mm, and the compression ratio is mostly 4-6:1; in terms of comprehensive consideration of production cost performance and market acceptance, φ2.5 is more common, and the selection of compression ratio It is a difficult point. This article focuses on a few tips: how to choose the right compression ratio according to the formula, for reference only. First, the quality coefficient is estimated The meaning of the quality coefficient: refers to the contribution rate of raw materials to the quality of the particles; according to the size of the influence, it is represented by the number of 0-10, the higher the number, the better the quality of the particles produced with the raw material (the easier it is to form) . The recommended quality coefficient for suckling pig pellets is between 4.6 and 5.0. A value of 5.0 means that the pellets are harder, and a value of less than 4.6 means that the powder has a higher chalking rate. As shown in Example 1, after the weighted average calculation, the quality coefficient value is 5.3, which indicates that the product manufactured by the formula may be hard, and it is suitable to select a ring mold with a low compression ratio. Example 1: A feed mill production formula The quality coefficient of the raw materials can be used to predict the quality of the particles. However, the quality coefficient of many raw materials cannot be determined at present, and the quality coefficient of some raw materials is determined by human experience, so the results must be judged in conjunction with production experience. Second, the use of "special" raw materials to judge The "sticky" raw materials that have a great influence on the granulation in the grooving materials are: expanded corn, flour, whey powder, milk powder, sugar, etc., and the addition amount exceeds a certain limit, which tends to cause the particles to be hard. 1. First determine whether the formula type is wheat or corn; if it is wheat, it is recommended to choose a low compression ratio (4-5:1). 2, when the proportion of whey powder or milk powder reaches 10% or even higher, you need to consider the use of low contraction ratio 3. The fat in the formula is added in solid form and contains a certain amount of "sticky" raw materials. It is best not to choose a mold with a high compression ratio. According to the production formula of a feed mill as follows, there is no liquid fat in the formula, and there is a considerable amount of expanded corn and some whey powder. The customer produced a compression ratio of 6:1, resulting in a harder particle size of 2.5 kgf. Example 1: Formulation of a feed mill III. Choosing the right mold manufacturer Due to the quality requirements of the teaching material itself, the technical parameters of the mold are often required. It is recommended to choose some regular mold manufacturers, such as Shepherd, Buhler, etc., they will also give some advice on the choice of mold. Some molds produced by small manufacturers often have uneven particle size due to improper design of technical parameters such as release holes. In actual production, because there are many factors affecting the hardness of the particles, and they have mutual cross-correlation, it is unrealistic to select the ring mode parameters accurately based on the formula materials. It is necessary to comprehensively consider the crushing process, quenching process, cooling process and machine. The above suggestions are for reference only. In order to achieve the desired particle quality, it is more important to try and summarize in the production practice. This article was written by a special contributor to the China Feed Industry Information Network, contributor: Zhou Xiaoquan. Reprint, please indicate the source ~ Steel Measuring Tape,Tape Line Measure,Magnet Tape Measure,Rubber Tape Line Measure Shangqiu Hengli Measuring Tools Co.,Ltd , https://www.jjmtools.com