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Method for preparing compound controlled-release fertilizer from pulverized fuel ash serving as raw material

A fly ash and composite technology, applied in the direction of fertilizer mixture, fertilization device, application, etc., can solve the problems of water body and environmental pollution, low fertilizer utilization rate, low fertilizer utilization rate, etc., to prevent the loss of nitrogen fertilizer and good social benefits And economic benefits, the effect of low production cost

Active Publication Date: 2011-06-15
HUBEI FORBON TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Agricultural production is inseparable from chemical fertilizers. Traditional fertilizers have low utilization rates, short fertilizer effectiveness periods, and nutrients are easily leached, volatilized, and fixed.
The large loss of chemical fertilizers in agricultural production not only leads to low utilization rate of fertilizers, but also causes serious pollution of water bodies and the environment

Method used

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  • Method for preparing compound controlled-release fertilizer from pulverized fuel ash serving as raw material
  • Method for preparing compound controlled-release fertilizer from pulverized fuel ash serving as raw material
  • Method for preparing compound controlled-release fertilizer from pulverized fuel ash serving as raw material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation of compound loss-controlling fertilizer using fly ash as raw material:

[0020] a) 5.0g of fly ash is placed in a muffle furnace for roasting, the roasting temperature is 600°C, and the roasting time is 2 hours; the roasted fly ash is acid-dissolved for 2 hours with 15ml of 2mol / L hydrochloric acid , the temperature is maintained at 80°C to obtain pretreated fly ash;

[0021] b) The pretreated fly ash, industrial aluminum hydroxide, sodium carbonate, and polyaluminum ferric chloride are mixed in a mass ratio of 7:1:8:7; the ingredients are roasted in a muffle furnace for 1 hour , the roasting temperature is 1000°C to obtain the roasted product;

[0022] c) Under stirring conditions, put all the roasted products into deionized water, raise the temperature to 40°C, keep the temperature at a constant temperature for 2 hours, and take the liquid to make up alkali until neutral;

[0023] d) heating the mixed solution to 100°C, and crystallizing for 3 hours unde...

Embodiment 2

[0026] Preparation of compound loss-controlling fertilizer using fly ash as raw material:

[0027] a) 5.0g fly ash is placed in a muffle furnace for roasting, the roasting temperature is 1000°C, and the roasting time is 4 hours; the roasted fly ash is acid-dissolved for 3 hours with 15ml 2mol / L sulfuric acid, The temperature is maintained at 60°C to obtain pretreated fly ash;

[0028] b) The pretreated fly ash, industrial aluminum hydroxide, sodium carbonate, and polyaluminum ferric chloride are mixed with a mass ratio of 10: 1.5: 15: 10; the ingredients are placed in a muffle furnace and roasted for 1 hour, The calcination temperature is 1000°C to obtain a calcination product;

[0029] c) Under the condition of stirring, all the roasted products are immersed in deionized water, warmed to 50°C, kept at a constant temperature for 2 hours, and the liquid is taken to make up alkali until neutral;

[0030] d) heating the mixed solution to 100°C, and crystallizing for 7 hours und...

Embodiment 3

[0033] Preparation of compound loss-controlling fertilizer using fly ash as raw material:

[0034] a) The fly ash of 5.0g is placed in the muffle furnace and roasted, the roasting temperature is 1000 ℃, and the roasting time is 3 hours; add the sulfuric acid of 7.5ml 2mol / L and the hydrochloric acid of 7.5ml 2mol / L to the roasted The fly ash was acid-dissolved for 3 hours, and the temperature was kept at 90°C to obtain pretreated fly ash;

[0035] b) Pretreatment fly ash, industrial aluminum hydroxide, sodium carbonate, and polyaluminum ferric chloride are mixed at a mass ratio of 20:0.5:3:15; the ingredients are roasted in a muffle furnace for 1 hour, and the roasting The temperature is 1000°C to obtain a roasted product;

[0036] c) Under stirring conditions, immerse all the roasted products in deionized water, raise the temperature to 50°C, keep the temperature at a constant temperature for 2 hours, and take the liquid to make up alkali until neutral;

[0037] d) heating ...

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Abstract

The invention relates to a method for preparing a compound controlled-release fertilizer from pulverized fuel ash serving as a raw material. The method comprises the following steps of: mixing a fertilizer, modified pulverized fuel ash, industrial aluminum hydroxide, sodium carbonate and polymeric aluminum ferric chloride; and pelletizing the mixture to obtain a compound controlled-release fertilizer. The method has the advantages of extensive raw material sources, low cost, simple production process, environmental friendliness and easiness for commercialization and supplies a new thought to comprehensive utilization of the pulverized fuel ash. By adopting the compound controlled-release fertilizer, nitrogen is fixed in the soil, so that the loss of the nitrogen can be reduced by 20 to 60percent, the utilization ratio of the compound fertilizer is increased, pollution of nitrogen to water bodies and the atmosphere is reduced, and good social benefit and economic benefit are achieved.

Description

technical field [0001] The invention relates to the field of chemical fertilizers, in particular to a method for preparing a compound loss-controlling fertilizer using fly ash as a raw material. Background technique [0002] Agricultural production is inseparable from chemical fertilizers. Traditional fertilizers have a low utilization rate, a short period of fertilizer effectiveness, and nutrients are easily leached, volatilized and fixed. The large loss of chemical fertilizers in agricultural production not only leads to low utilization rate of fertilizers, but also causes serious pollution of water bodies and the environment. According to statistics, 20% to 25% of the nitrogen fertilizers applied in the current season are discharged from farmland with precipitation runoff and seepage, and enter slow-flowing water bodies such as lakes, estuaries, and bays, resulting in eutrophication of water bodies. As far as the pollution of surface water (lakes, etc.) is concerned, nit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 宋功武王仁宗何瑜阮自斌潘全刘裕
Owner HUBEI FORBON TECH
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