Drying-free preparing technology adopting particle boric magnesium fertilizer acid method

Abstract

The invention provides a drying-free preparing technology adopting a particle boric magnesium fertilizer acid method. The drying-free preparing technology comprises the following steps that 1, wet boric sludge is thrown into a double-shaft mixing machine, 92.5% concentrated sulfuric acid is added to enable boron and magnesium in the boric sludge to be acidified and decomposed, heat is emitted, carbon dioxide and water vapor escape, the temperature for materials is 65 DEGC-80 DEG C at the moment, a pH value is 7-8, and a part of magnesium oxide forms magnesium sulfate monohydrate; 2, after being stirred, magnesium sulfate monohydrate is cooled and stands, and after the water escapes completely, the boric sludge begins hardening and is naturally dried into blocks, namely acidified boric sludge blocks; 3, the acidified boric sludge blocks are smashed to obtain dry powder; 4, the smashed dry powder is pelletized in an acid spraying mode in a disc palletizing machine with 40-68% dilute sulfuric acid serving as an adhesion agent, the boric sludge is further acidified and prepared into balls, and the balls are cooled and screened to obtain finished products. By the adoption of the drying-free technology, consumption of fire coal is omitted, and production cost is effectively reduced; meanwhile, the boric sludge serves as a basic material, drying is avoided in the acid method, and harm to the environment from the boric sludge can be reduced effectively.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizers, in particular to a drying-free preparation process of granular boron magnesium fertilizer and acid method. Background technique [0002] The main components in boron mud, Mg, B, Fe, Si, and Ca, are all medium and trace elements needed for plant growth, especially in the boron-deficient soil in most of the cultivated land in my country, which has a great potential demand for boron, while in my country It is also a country where boron resources are not rich and unevenly distributed, so boron mud, as one of the sources of micro-fertilizers in agriculture, has a broad prospect. Through the deep processing and utilization of boron mud, different compound trace element fertilizers can be produced, such as: boron-magnesium phosphate fertilizer, boron-magnesium fertilizer, boron-calcium-magnesium-phosphate fertilizer, boron-potassium-magnesium-zinc fertilizer and boron-containing compound...

AI Technical Summary

Problems solved by technology

Most of the domestic use boron mud as a filling material for compound fe