Preparation method of water dispersible granule medicinal fertilizer

Abstract

The invention discloses a preparation method of a water dispersible granule medicinal fertilizer, which comprises the following steps of: firstly preparing fillers, sterilizing agents, compound activating agents, micro element fertilizers and a compound assistant which are required for preparing the medicinal fertilizers according to component proportion of different medicinal fertilizers, wherein the sterilizing agents contain liquid raw materials; then, taking a part of fillers for adsorbing the liquid raw materials, adding rest of other components and uniformly mixing to obtain a raw material mixture; carrying out air current pulverization on the raw material mixture to be below 15 microns to obtain wettable powder; controlling the granularity D98 to be less than or equal to 15 micronsand the suspension ratio to be over 80 percent; taking water-borne binder solutions and mixing the water-borne binder solutions with the wettable powder, and obtaining an intermediate product throughsqueezing granulation-drying or boiling granulation; and finally, screening to obtain the water dispersible granule medicinal fertilizer product with the required grain size. The preparation process has the advantages of environmental friendliness, security, low cost, capability of guaranteeing product quality and the like.

Description

technical field [0001] The invention relates to a preparation method of medicinal fertilizer, in particular to a preparation method of water-dispersible granule medicinal fertilizer. Background technique [0002] Pesticide water dispersible granules are a new dosage form developed in the 1980s. It is the most superior and competitive new dosage form among the current pesticide dosage forms. The process flow is as follows: prepare the original drug and auxiliary agents, etc.→ Crushing→mixing→adding liquid to make soft material→granulating→drying→sieving→passing the test→packing. [0003] The preparation of pesticides into medicinal fertilizers and application in agricultural production is a technical unit that solves the problem of using both pests and fertilizers in agricultural production. Corresponding products are available at home and abroad. Existing research is still limited to the technical level of mixing medicine and fertilizer. For example, pesticide herbicides an...

AI Technical Summary

Problems solved by technology

[0004] The existing CN101671207B Chinese patent document discloses a bactericidal and production-increasing medicinal fertilizer and its use method, wherein it discloses medicinal fertilizer products using triazole fungicides such as difenoconazole and propiconazole as basic components, and Fungicides such as propiconazole are liquid at room temperature. According to the existing process, it is difficult to granulate after adsorption with ordinary fillers. Even if the granulation is successful, the suspension rate, dispersibility and disintegration of the product are also difficult. In addition, the disclosed medicinal fertilizer products often need to add inorganic salts of trace elements as compound micro-fertilizers. Considering that medicinal fertilizers already contain liquid fungicides, if water-soluble inorganic salts are added to the liquid fungicides It is used to prepare water-dispersible granule medicinal fertilizer, which is even more difficult for those skilled in the art

Due to the aforementioned technical difficulties, only water-dispersible granule fertilizers containing solid raw materials are available, and it is difficult to see relevant reports on water-dispersible granule fertilizers containing liquid raw materials and their preparation processes