At present, the raw materials of trace elements commonly used in feed enterprises are copper, iron, manganese, zinc, iodine, selenium, cobalt sulfate or other salts, which basically contain crystal water. Since all are derived from the mineral chemical industry, it is the key to meet the health indicators of the content of harmful elements such as lead, arsenic and fluoride. Ordinary feed grade trace element raw materials have many problems in the practical application of feed production. 1. Strong moisture absorption Most of the trace elements of the product should be removed from the partially crystallized water to improve its processing properties, and also cause its strong moisture absorption. In practice, we found that it is difficult to make the raw material packaging without damage. Even if it is difficult to find a small hole in the plastic film inside the package, it will cause moisture absorption and agglomeration around the hole. Even the plastic bag mouth in the raw material package has agglomeration because the tie is not strict enough. A survey of commodity composite micro-mines in the market found that simple pre-mixed micro-mines are prone to agglomeration. The agglomerated micro-mines constitute a feed safety issue. 2. Copper sulfate has residual acid feed grade copper sulfate raw material because it needs to be crystallized under acidic conditions, the actual detection PH value is less than 5. While copper ions catalyze faster reaction under acidic conditions, especially high Copper formula feeds play a key role in the rancidity of oils and fats, and the damage to vitamins in feeds is severe. The high-copper formula of the piglets has a good anti-mite effect, but at the same time causes stomach ulcers and poor feeding, and also found that the cecum has hemolysis. 3. Zinc sulphate contains oxidant. In the actual production, zinc iron is the associated ore. The production of sulphate also produces ferrous sulfate. In order to increase the effective content of zinc sulphate, oxidizing agent is added to separate ferrous iron into ferric iron, but The residual oxidant cannot be removed. After simple premixing of the oxidizing agent zinc sulphate and ferrous sulphate, the ferrous sulphate is quickly oxidized and yellowed. 4. Easily oxidized In the actual production of premix, the dust of ferrous sulfate is yellow, and it is oxidized even for a short time. It can be seen that ferrous sulfate is very unstable in the premix. We found that iron deficiency in pigs on the market is very common, and the amount of iron in the formula is much higher than the demand of pigs. In addition to the reason for the utilization rate of iron absorption, it is mainly The ferrous iron is oxidized to trivalent iron, and the trivalent iron has no nutritional value. KI will undergo a oximation reaction in the air, and elemental iodine will volatilize. 5. Excessive toxicity In addition to the severe poisoning of sodium selenite powder, if the dust removal and labor protection measures are not good in production, the damage of other trace elements to humans is also very serious. In addition, the original calcium iodate powder will explode due to severe vibration. 6. Poor palatability The smell and taste of trace elements can negatively affect the appetite and feed intake of animals. Sulfate has a large astringency. The high content of ferric iron diets generally resists eating. 7. Destruction of Vitamins A large number of tests have shown that ordinary high concentrations of trace elements can significantly reduce the content of vitamins in the feed, especially in concentrated materials and premixes. Conclusion: Composite micro-mine can not be a simple mixture of trace element raw materials, otherwise there will be serious quality problems. Loader Parts,Track Loader Parts,Case Loader Parts,Skid Loader Parts JINING SHANTE SONGZHENG CONSTRUCTION MACHINERY CO.LTD , https://www.sdkomatsuexcavatorparts.com