Method for preparing feed-grade sodium selenite coated diluting agent

Abstract

The invention relates to a method for preparing a feed-grade sodium selenite coated diluting agent, and belongs to the field of a feed additive. The method comprises the steps of weighing raw materials, dissolving, mixing, heating and stirring, completing coating, embedding and diluting treatment through one step, drying and the like. The technical scheme provided by the invention aims at the defects in the prior art; compressed air is sprayed out from the both sides of a nozzle to the inner inclined direction in a physical and mechanical manner; a mixed solution of a feed-grade sodium selenite solution and a coating material solution is sprayed out from the center of the nozzle and is mixed outside the nozzle; the mixed solution is atomized and is sprayed to a carrier, and is mixed in a mixing machine, so that the coating material is coated on the sodium selenite surface and is embedded on the carrier simultaneously; and the coating, embedding and diluting treatment can be completed through only one step. Compared with the conventional chemical coating method and the like, the production efficiency is improved, the cost is reduced, the difficulty of the diluting treatment is reduced, and the coating effect is good.

Description

technical field [0001] The invention relates to a preparation method of feed grade sodium selenite, more specifically, the invention relates to a preparation method of feed grade sodium selenite coating diluent, which belongs to the field of feed additives. Background technique [0002] Selenium is a component of glutathione peroxidase, which can decompose intracellular peroxides, prevent cell oxidative damage, and protect the integrity and normal function of cell membranes, so as to ensure the viscera, bones, and muscles of animals. Normal function, enhance the body's immunity. Adding sodium selenite in feed can improve the reproductive function of livestock and prevent the occurrence of white muscle disease. For poultry, it can increase the egg production rate, hatching rate and brooding rate. It can promote the growth of fish and improve the survival rate. At present, sodium selenite is an important raw material for selenium supplementation in feed production. Feed-gr...

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Problems solved by technology

[0005] Judging from the above-mentioned patents and the existing published academic literature and patent literature, the coating technology adopted has a high production cost and a relatively complicated production process in terms of raw material selection and process steps.

Moreover, the amount of the above-mentioned patented raw material sodium selenite has reached 85-95%, which makes the final product sodium selenite content too high. According to the relevant requirements of the national feed processing, such a high content of sodium selenite is not allowed to directly enter the premix For the production of raw materials, it must be diluted first to make a diluent (or called a premix), which usually needs to be diluted until the selenium content is about 1% before entering the formula production

If the coated sodium selenite product is diluted and mixed with a carrier, it will not only be labor-intensive and time-consuming, but also the particle size of the sodium selenite micropowder has changed, resulting in poor mixing uniformity

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