Multiple-effect citrate-soluble silicon fertilizer, and preparation method and application of silicon fertilizer

Abstract

The invention discloses a multiple-effect citrate-soluble silicon fertilizer, a preparation method of the silicon fertilizer, and an application of the citrate-soluble silicon fertilizer in farmland.The multiple-effect citrate-soluble silicon fertilizer contains various nutritive elements such as silicon, potassium and calcium and comprises the following raw materials: silicon-containing residueand an activator, wherein the activator comprises a mixture of potassium carbonate and calcium carbonate. The preparation method of the citrate-soluble silicon fertilizer comprises the steps of intensively mixing and milling the silicon-containing residue and the activator, performing high-temperature roasting treatment by using a rotary furnace, and performing milling at last to form the multiple-effect citrate-soluble silicon fertilizer. When the multiple-effect citrate-soluble silicon fertilizer is applied to farmland soil as a base fertilizer, the silicon fertilizer has better effects of improving soil fertility and promoting crop yield increase. The recycling of the silicon-containing residue is achieved; at the same time, the multi-effect citrate-soluble silicon fertilizer with longfertilizer efficiency and low possibility of loss is obtained; in addition, a preparation process is simple; a production period is short; large-scale production is easy to realize; and the silicon fertilizer can achieve better economic and social benefits.

Description

Technical field [0001] The invention belongs to the technical field of fertilizer processing and application, and specifically relates to a method for preparing multi-effect citrate soluble silicon fertilizer by using silicon-containing waste residue and its application in farmland soil. Background technique [0002] Silicon is considered by the international soil community to be the fourth plant nutrient element after nitrogen, phosphorus, and potassium. It can not only enhance the photosynthesis of crops, but also resist lodging and increase the absorption of phosphorus, which has a very obvious effect on increasing crop production. In addition, the effective silicon in silicon fertilizer can change the form of heavy metals by interacting with heavy metals in the soil, reduce the activity of heavy metals, and inhibit the absorption of heavy metals by plants, thereby reducing the harm of heavy metals in the soil. [0003] However, although the soil is rich in silicon, there is ver...

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Problems solved by technology

[0004] At present, there are two main types of silicon fertilizers produced and applied in China: one is artificially synthesized silicon fertilizers, such as dicalcium silicate (2CaO·SiO 2 ), monocalcium silicate (CaO SiO 2 ), calcium magnesium silicate (CaO MgO SiO 2 ), sodium metasilicate and high-efficiency silicon fertilizers whose main components are sodium silicate and sodium metasilicate, but this type of silicon fertilizer is expensive and difficult to promote; the other type is processed from various industrial solid wastes The silicon fertilizer mainly uses the reaction of silicon in raw materials such as ironmaking blast furnace slag, yellow phosphorus slag, and power plant fly ash with alkaline additives at high temperature to form silicate complexes, thereby realizing the activation of silicon. The method can effectively realize the recycling and reuse of resources, which is an important direction for the development of silicon fertilizer at present.

[0005] As one of industrial waste residues, silicon-containing waste residues not only occupy land idle and affect the surrounding environment, but also the silicon resources in them are not fully utilized.

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