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Preparation method and product of coal gangue compound fertilizer

A compound fertilizer and gangue technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems of high solidification degree of organic matter, insufficient decomposition conversion rate, and difficult dissolution of nutrients, so as to reduce the solidification degree and increase crop yield , the effect of balanced nutrition elements

Pending Publication Date: 2022-04-29
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The development of coal gangue fertilizer is obviously an effective way, but there are still many problems about coal gangue fertilizer, such as: the degree of solidification of organic matter in coal gangue is relatively high, the decomposition conversion rate is not high enough, and the availability of carbon sources Need to improve, nutrients are difficult to dissolve, and nutrients are unbalanced, etc.

Method used

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  • Preparation method and product of coal gangue compound fertilizer
  • Preparation method and product of coal gangue compound fertilizer
  • Preparation method and product of coal gangue compound fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of coal gangue compound fertilizer:

[0038] (1) Pulverizing the coal gangue to screen out coal gangue particles with a particle size of ≤0.8 mm;

[0039] (2) Get superphosphate 10kg, ammonium sulfate 25kg, potassium permanganate 5kg, add water 60L, add the coal gangue particle 100kg that step (1) sieves out after dissolving, stir, obtain mixture;

[0040] (3) Place the mixture obtained in step (2) in a microwave heating device, and microwave it for 40 min at a power of 900W, so that the reaction is fully carried out, and the water evaporated in the reaction process is returned to the reactant through the reflux device;

[0041] (4) After the microwave heating is finished, the reactant is taken out, and placed in a blast drying device to evaporate the moisture to obtain a coal gangue compound fertilizer.

Embodiment 2

[0043] Preparation of coal gangue compound fertilizer:

[0044] (1) Pulverizing the coal gangue to screen out coal gangue particles with a particle size of ≤0.8 mm;

[0045] (2) Get superphosphate 8kg, ammonium dihydrogen phosphate 30kg, potassium permanganate 4kg, add water 64L, add the coal gangue particle 100kg that step (1) sieves out after dissolving, stir, obtain mixture;

[0046] (3) Place the mixture obtained in step (2) in a microwave heating device, and heat it by microwave for 30 min at a power of 100W, so that the reaction is fully carried out, and the water evaporated in the reaction process is returned to the reactant through the reflux device;

[0047] (4) After the microwave heating is finished, the reactant is taken out, and placed in a blast drying device to evaporate the moisture to obtain a coal gangue compound fertilizer.

Embodiment 3

[0049] Preparation of coal gangue compound fertilizer:

[0050] (1) Pulverizing the coal gangue to screen out coal gangue particles with a particle size of ≤0.8 mm;

[0051] (2) Get superphosphate 10kg, ammonium dihydrogen phosphate 20kg, potassium permanganate 4kg, add water 64L, add the coal gangue particle 100kg that step (1) sieves out after dissolving, stir, obtain mixture;

[0052] (3) Place the mixture obtained in step (2) in a microwave heating device, and heat it by microwave for 30 min at a power of 100W, so that the reaction is fully carried out, and the water evaporated in the reaction process is returned to the reactant through the reflux device;

[0053] (4) After the microwave heating is finished, the reactant is taken out, and placed in a blast drying device to evaporate the moisture to obtain a coal gangue compound fertilizer.

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Abstract

The invention discloses a preparation method of a coal gangue compound fertilizer and a product, and belongs to the technical field of solid waste treatment. The preparation method of the coal gangue compound fertilizer comprises the following steps: dissolving an acidic phosphate fertilizer, an acidic nitrogen fertilizer and potassium permanganate in water, and adding coal gangue particles to obtain a mixture; and performing microwave heating on the obtained mixture, and then removing moisture to obtain the coal gangue compound fertilizer. By compounding the acidic phosphate fertilizer, the acidic nitrogen fertilizer, the potassium permanganate and the coal gangue particles, the coal gangue compound fertilizer with balanced nutrient elements and high fertilizer efficiency is prepared. Through the comprehensive action of the raw materials and the preparation steps, the coal gangue solid waste is prepared into the coal gangue compound fertilizer with high fertilizer efficiency, and the reduction and resource utilization of the coal gangue can be realized. Meanwhile, the used raw materials are all common raw materials, the preparation steps are simple, the consumed time is short, and the method has high application and popularization value.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a preparation method and product of coal gangue compound fertilizer. Background technique [0002] Coal gangue is the waste generated during coal mining and processing, and it is the industrial solid waste with the largest discharge and stockpile. The stockpiling of coal gangue has a great impact on the environment. First, it causes waste of land resources; second, the weathering and leaching of coal gangue pollutes soil and water; create pollution. Therefore, it is very necessary to realize the reduction and resource utilization of coal gangue. [0003] At present, coal gangue has been widely used in power generation, building materials, chemicals, backfilling and agriculture. In view of the fact that coal gangue originates from strata and has homology with soil, it is undoubtedly one of the best ways to effectively utilize coal gangue into soil as an agricultur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/80
CPCC05B1/02C05G3/00C05G3/80C05C3/00C05D1/00C05D9/00C05F11/02C05B7/00
Inventor 高成跃王档良董青红翟果果
Owner CHINA UNIV OF MINING & TECH
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