Method for using fly ash to prepare silicon compound fertilizer

A technology of fly ash and compound fertilizer, applied in urea compound fertilizer, nitrogen fertilizer, potash fertilizer and other directions, can solve problems such as insufficient application of fertilizer elements, and achieve the effects of increasing crop yield, easy absorption, and improving the quality of agricultural products

Inactive Publication Date: 2017-09-22
山东乡里乡亲互联网科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of fly ash is mainly as a fertilizer slow-release carrier, but the application of fertilizer elements contained in fly ash itself is insufficient

Method used

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  • Method for using fly ash to prepare silicon compound fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The power plant fly ash is pulverized to 200 mesh with a pulverizer, and the pulverized fly ash is fully reacted with dilute hydrochloric acid with a concentration of 20% at a solid-liquid ratio of 1:3 (g / ml), and then filtered to obtain a mixture containing Silicon filter residue, and this silicon-containing filter residue is dried for use. At the same time, the obtained filtrate was evaporated and crystallized at 120° C. to obtain a solid mixture containing calcium chloride and magnesium chloride crystals for subsequent use. The standby silicon-containing filter residue is reacted with a sodium hydroxide solution with a concentration of 25% at a ratio of 1:1.5 (g / ml) at 80° C. to obtain a sodium silicate-containing liquid mixture.

[0030] Take 50 kilograms of weathered coal, 300 kilograms of urea, 350 kilograms of monoammonium phosphate, 250 kilograms of potassium chloride, 5 kilograms of bentonite, 10 kilograms of trace element fertilizers (10 kilograms of solid mix...

Embodiment 2

[0032] The power plant fly ash is ground to 180 mesh with a pulverizer, and the pulverized fly ash is fully reacted with dilute hydrochloric acid with a concentration of 15% at a solid-liquid ratio of 1:3.5 (g / ml), and then filtered to obtain a mixture containing Silicon filter residue, and this silicon-containing filter residue is dried for use. At the same time, the obtained filtrate was evaporated and crystallized at 130°C to obtain a solid mixture containing calcium chloride and magnesium chloride crystals for subsequent use. The standby silicon-containing filter residue and the sodium hydroxide solution with a concentration of 20% are reacted at 80° C. at a ratio of 1:1.2 (g / ml) to obtain a sodium silicate-containing liquid mixture.

[0033] Get 60 kilograms of peat, 350 kilograms of urea, 300 kilograms of calcium magnesium phosphate fertilizer, 200 kilograms of potassium sulfate, 10 kilograms of bentonite, 10 kilograms of trace element fertilizers (5 kilograms of solid m...

Embodiment 3

[0035] The power plant fly ash is ground to 150 mesh with a pulverizer, and the pulverized fly ash is fully reacted with dilute hydrochloric acid with a concentration of 18% at a solid-liquid ratio of 1:3.2 (g / ml), and then filtered to obtain a mixture containing Silicon filter residue, and this silicon-containing filter residue is dried for use. At the same time, the obtained filtrate was evaporated and crystallized at 150°C to obtain a solid mixture containing calcium chloride and magnesium chloride crystals for subsequent use. The standby silicon-containing filter residue and the sodium hydroxide solution with a concentration of 22% are reacted at 70° C. in a ratio of 1:1.3 (g / ml) to obtain a sodium silicate-containing liquid mixture.

[0036] Get 80 kilograms of lignite, 320 kilograms of ammonium chloride, 280 kilograms of monoammonium phosphate, 250 kilograms of potassium sulfate, 5 kilograms of bentonite, 5 kilograms of trace element fertilizers (5 kilograms of solid mix...

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Abstract

The invention discloses a method for using fly ash to prepare silicon compound fertilizer. The method comprises the following steps of firstly grinding fly ash to 150-200 meshes, making the ground fly ash sufficiently react with dilute hydrochloric acid, conducting filtration, afterwards obtaining silicon-containing residue, and at the same time conducting evaporative crystallization on filtering liquor to obtain a solid mixture containing calcium chloride and magnesium chloride crystalline; then making the silicon-containing residue react with a sodium hydroxide solution to obtain a liquid mixture containing sodium silicate; finally mixing the mixture containing the sodium silicate solution with humic acid, nitrogenous fertilizer, phosphate fertilizer, potash fertilizer, bentonite and trace-element fertilizer and the like to conduct pelletizing to produce the silicon compound fertilizer. The prepared silicon compound fertilizer is high in the content of soluble silicon, elements in the fly ash are fully utilized, the nutrients are more comprehensive, and the method for using fly ash to prepare the silicon compound fertilizer has the advantages that the yield of crops is increased, the quality is improved, and the soil is improved.

Description

technical field [0001] The invention relates to the technical field of fertilizer processing, in particular to a method for preparing silicon compound fertilizer from fly ash. Background technique [0002] Compound fertilizer is a general term for fertilizers containing two or more of the three nutrients nitrogen, phosphorus and potassium. Compound fertilizer has the advantages of high nutrient content, few side components and good physical properties. It plays a very important role in balancing fertilization, improving fertilizer utilization, and promoting high and stable crop yields. Silicon is the fourth most important element in crop production after nitrogen, phosphorus and potassium. At present, while applying a large amount of elements such as nitrogen, phosphorus and potassium to crops, the medium element silicon is also applied to the fertilization of crops to provide comprehensive nutrient fertilizers to crops, so as to achieve high efficiency, high yield and high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/80
CPCC05B7/00C05B13/02C05G3/80C05C9/00C05D1/02C05D3/00C05D5/00C05D9/00C05D9/02C05F11/02C05C3/00
Inventor 原小辉
Owner 山东乡里乡亲互联网科技股份有限公司
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