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Microelement-introducing weathered coal activating agent as well as activation method and application

An activation method, a technology of weathering coal, applied in the direction of application, organic fertilizer, fertilizer mixture, etc., can solve the problems of environmental pollution, restrictions on wide application, special production equipment, etc., and achieve the effect of improving soil, increasing extraction rate, and low cost

Active Publication Date: 2012-04-11
INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above activation technologies have defects such as high cost of selecting activators, special production equipment, and easy pollution to the environment, which restricts their wide application in fertilizer production.

Method used

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  • Microelement-introducing weathered coal activating agent as well as activation method and application
  • Microelement-introducing weathered coal activating agent as well as activation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1. the zinc sulfate of 12.6g is added into 30ml water and dissolves completely, then adds 20ml ammoniacal liquor, stirs in mixing tank until forming clear homogeneous solution, makes the activator of zinc ammine ion. Crush the weathered coal to a particle size below 10 mesh, evenly spray the activator accounting for 15% of the total mass of the weathered coal, stir evenly with a mixer, react at 48°C for 2 hours, cover with a plastic film, and let it stand for 13 hours. The activated weathered coal was obtained, and the content of water-soluble humic acid was determined to be 38%.

[0033] The above-mentioned activated weathered coal is uniformly mixed with urea, phosphate fertilizer and potassium fertilizer, and bentonite is added to granulate according to the prior art to obtain an organic-inorganic compound fertilizer.

Embodiment 2

[0034] Embodiment 2. The zinc sulfate of 12.6g is added into 30ml water and dissolves completely, then adds 20ml ammonia water and stirs to form clear homogeneous solution, makes the activator of zinc ammine ion. Crush the weathered coal to a particle size below 10 mesh, evenly spray the activator accounting for 15% of the total mass of the weathered coal, stir evenly with a mixer, react at 45°C for 2 hours, cover with a plastic film, and let it stand for 15 hours. The activated weathered coal was obtained, and the content of water-soluble humic acid was determined to be 36.5%.

[0035] The activated weathered coal obtained above is added to water 4 times the mass of the activated weathered coal, the insolubles are discarded by filtration, and the filtrate is dried and crystallized to obtain a complex product of water-soluble ammonium humate and water-soluble zinc humate. Used in the manufacture of humic acid water-soluble fertilizers containing trace elements.

Embodiment 3

[0036] Embodiment 3. The zinc sulfate of 12.6g is added into 30ml water and dissolves completely, then adds 20ml ammonia water and stirs to form clear homogeneous solution, makes the activator of zinc ammine ion. Crush the weathered coal to a particle size below 10 meshes, evenly spray the activator accounting for 20% of the total mass of the weathered coal, stir evenly with a mixer, react at 42°C for 3 hours, cover with a plastic film, and let it stand for 12 hours. The activated weathered coal was obtained, and the content of water-soluble humic acid was determined to be 41.5%.

[0037] The activated weathered coal obtained above is added to water with 3 times the mass of the activated weathered coal, the insolubles are discarded by filtration, and the filtrate is directly filled into liquid fertilizer for use.

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Abstract

The invention relates to a microelement-introducing weathered coal activating agent as well as an activation method and application. The activating agent is an aqueous solution containing zinc-ammonia complex ion, is prepared by reacting zinc salt aqueous solution and excessive ammonia water, and is used for extracting humic acid in weathered coal. The activation method comprises the steps of uniformly spraying the activating agent to the surface of weathered coal, uniformly stirring, reacting at the temperature of 40-50 DEG C for 2-3 hours, and placing for 10-20 hours to obtain activated weathered coal. By the method, the extraction rate of water-soluble humic acid is improved, nitrogen is introduced and microelements required by crops are also introduced to form chelate with humic acid,and the high-temperature stability of water-soluble humic acid is improved. The prepared activated weathered coal fertilizer can be widely applied to various crops and soil.

Description

technical field [0001] The invention relates to a weathered coal activation technology, in particular to a weathered coal activator capable of introducing trace elements and its application in fertilizer production. Background technique [0002] my country has very rich weathered coal resources, which are mainly distributed in Xinjiang, Inner Mongolia, Shanxi and other areas with many open-pit coal mines, which have not been effectively utilized so far. A large amount of humic acid in weathered coal is a natural polymer compound, which not only has a very wide application in the fields of metallurgy, chemical industry and environmental protection, but also can be used as an important fertilizer and growth regulator in agricultural production. However, most of the humic acid in Fenghua coal exists in the form of calcium and magnesium insolubles. Therefore, it is of great significance to extract humic acid from weathered coal in the form of water-soluble humate by adopting eff...

Claims

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Application Information

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IPC IPC(8): C05F11/02C05G1/00C05G3/04C05G3/80
Inventor 沈玉文刘兆辉范本荣江丽华李文刚杨果林海涛
Owner INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI
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