Slow release type feed acidifying agent preparing method

Abstract

The invention discloses a slow release type feed acidifying agent preparing method. Packaging materials with different release rates are prepared firstly, and then the packaging materials are mixed and packaged at proportion. When the packaging materials are prepared, the following steps are conducted: firstly adsorbing liquid acid by silicon dioxide, then mixing with solid acid, and pulverizing so as to obtain a powder material; dividing the powder material into two parts, adding one part into a centrifugal granulator, then spraying part of molten fatty acid and ester of the fatty acid into the powder material in the centrifugal granulator, and spraying liquid while adding the rest part of the powder material so as to obtain needed particles; adding the obtained particles into a fluidized bed, conducting coating on the particle material by the part of molten fatty acid and ester of the fatty acid through a fluidized bed spraying system, and screening after the coating so as to obtain the packaging material with certain release rate, wherein the release rates are controlled by the total quantity of the fatty acid and the ester of the fatty acid. The preparation process is low in energy consumption, the prepared acidifying agent is free of corrosion, the cost is low, the effective constituent content is high, and staged release can be realized.

Description

technical field [0001] The invention relates to the improvement of feed additives, in particular to a preparation method of a slow-release feed acidifier, which belongs to the technical field of feed additives. [0002] Background technique [0003] Feed acidifier is a commonly used animal feed additive, it can inhibit the growth of harmful bacteria in the animal's digestive tract in the feed, maintain the balance of microbial flora in the animal's digestive tract, improve the digestibility of feed nutrients, improve the immunity of animals, improve Animal growth performance, lower feed to meat ratio. [0004] There are two processing techniques for acidifiers currently on the market: [0005] 1. Adsorption mixed type [0006] The main raw materials are: a, phosphoric acid, lactic acid, fumaric acid, malic acid, butyric acid, formic acid, propionic acid, acetic acid, citric acid; b, organic acid salts: calcium lactate, sodium formate, sodium diacetate; c, auxiliary materi...

AI Technical Summary

Problems solved by technology

[0008] Existing problems: Various active ingredients are exposed outside, and the following three problems appear: a) The compatibility of the feed is not good, and it is easy to react with the alkaline substances and amino acids in the feed ingredients, resulting in the ineffectiveness of the added ingredients; b) The product It is corrosive to a certain extent, and it is easy to corrode the skin of production workers, and it is easy to cause corrosion of equipment; c) Due to the use of volatile acids, it is easy to cause respiratory damage to employees

[0012] Existing problems: the slow-release acidulant prepared by the first process: a) the amount of coating material is high, generally reaching 40-55%, and the amount of silicon dioxide, resulting in a very low active ingredient; b) due to the coating material Evenly mixed with the active ingredients, resulting in the presence of acid on the surface of the particles, which does not solve the problems of ordinary acidifiers

The coated acidulant prepared by the second process: a) the prices of the coating materials used (ethyl cellulose, hypromellose, polypropylene resin, etc.) are very expensive, resulting in relatively high cost of the acidulant; The coating material needs to be diluted to about 10% with ethanol or water before spray coating can be carried out, resulting in the need for a large amount of energy consumption to evaporate the added water or ethanol during the coating process. If ethanol is used, it will also cause environmental pollution; c ) The coating time is long, and to achieve a good coating effect, the addition of the coating solution is a slow process. Generally, the time required for each batch is 3-8 hours, resulting in low production efficiency and high energy consumption.

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