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A preparation method for a long-acting slow-release chlorine-based nitrogen and potassium-containing compound fertilizer

A compound fertilizer, chlorine-based nitrogen technology, applied in urea compound fertilizer, nitrogen fertilizer, potash fertilizer and other directions, can solve the problem of slow-release and long-acting chlorine-based nitrogen-potassium compound fertilizer preparation methods are rare, the investment cost of high tower granulation equipment is high, The nitrogen fertilizer utilization rate is less than 30%, which can increase farmers' income, be beneficial to ecological balance, and be beneficial to environmental protection.

Active Publication Date: 2013-04-24
SHIKEFENG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of urea, it is easy to lose through volatilization, leaching, decomposition and runoff, resulting in low fertilizer utilization rate. According to statistics, the seasonal utilization rate is only about 30%, which not only causes waste of chemical fertilizers, but also Pollution of air, water, soil and other environments on which human beings depend
The nutrient utilization rate of chlorine-based compound fertilizers in the prior art is only 25%-35%, and the utilization rate of nitrogen fertilizer is less than 30%, and the loss is particularly serious
Firstly, the high-tower granulation urea compound fertilizer granules are prepared by the high-tower granulation device, and then the urea compound fertilizer granules are first coated with paraffin and the surface of the modified zeolite powder is coated twice. The disadvantage is that the high-tower granulation High equipment investment costs, paraffin is a non-renewable fossil resource, and it is not easy to degrade in the soil
Resin coatings are expensive and do not degrade easily in soil
[0013] The preparation method of slow-release long-acting chlorine-based nitrogen-potassium compound fertilizer is still rare in the prior art

Method used

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  • A preparation method for a long-acting slow-release chlorine-based nitrogen and potassium-containing compound fertilizer
  • A preparation method for a long-acting slow-release chlorine-based nitrogen and potassium-containing compound fertilizer
  • A preparation method for a long-acting slow-release chlorine-based nitrogen and potassium-containing compound fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] A kind of slow-release long-acting chlorine-based nitrogen-potassium compound fertilizer prepared according to the following steps

[0083] ①. Preparation of chlorine-based nitrogen and potassium compound fertilizer granules

[0084] First, after heating and melting 45 parts by weight of urea, 12 parts by weight of ammonium chloride and 35 parts by weight of potassium chloride are added to mix evenly, and 8 parts by weight of granulating agent and appropriate amount of water are added. Utilize traditional granulator to mix and granulate each component of the compound fertilizer, for subsequent use;

[0085] The granulation aid is composed of 60% to 70% bentonite and 40% to 30% bauxite powder;

[0086] The modified zeolite powder is composed of the following raw materials in weight percentage:

[0087] Zinc stearate 1.1%~2.5%

[0088] Zeolite powder 97.5%~98.9%

[0089] ②.. stearic acid one-time coating

[0090] The consumption of stearic acid is 1.2% of the chlorin...

Embodiment 2~ Embodiment 7

[0106] According to the method and steps of Example 1, according to the formula in Table 1, slow-release long-acting chlorine-based nitrogen and potassium compound fertilizers are prepared

[0107] Table 1

[0108] raw material

Example 2

Example 3

Example 4

Example 5

Example 6

Example 7

urea

50

40

48

51

30

60

ammonium chloride

10

20

13

17

10

11

potassium chloride

30

33

30

22

53

20

Granulation aid

10

7

9

10

7

9

stearic acid

0.6

0.8

1.0

1.2

0.9

1.1

[0109] The resulting product particles have a round appearance and no peculiar smell;

[0110] The product quality has reached the following technical indicators:

[0111]

[0112]

[0113] The slow-release and long-acting chlorine-based nitrogen-potassium compound fertilizers prepared in Examples 1 to 7 are all suitable for fiber cro...

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PUM

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Abstract

The invention provides a preparation method for a long-acting slow-release chlorine-based nitrogen and potassium-containing compound fertilizer. The compound fertilizer belongs to mixed fertilizers containing substances affecting nitrification of ammonium-containing compounds or urea in soil, and is characterized by being prepared by: first preparing chlorine-based nitrogen and potassium-containing compound fertilizer granules, and then performing primary coating and a secondary surface powder putting by using a modified zeolite powder to the chlorine-based nitrogen and potassium-containing compound fertilizer granules by using stearic acid; wherein: the chlorine-based nitrogen and potassium-containing compound fertilizer is prepared from the following raw materials, by weight: 30-60 parts of urea, 10-20 parts of ammonium chloride, 22-53 parts of potassium chloride, 7-11 parts of granulating aids, and an appropriate amount of water. Provided is a preparation method by using which a long-acting slow-release chlorine-based nitrogen and potassium-containing compound fertilizer having good slow-release effect and high fertilizer utilization rate can be produced, wherein the elemental chlorine in the compound fertilizer can play a full role in the growth of crops, the process is simple, the production cost is low, and coating materials are easy to be degraded in the soil by microbes, which is beneficial to soil, air and water environmental protection. The long-acting slow-release chlorine-based nitrogen and potassium-containing compound fertilizer has a good sustained-release effect, and high fertilizer utilization rate, suitable for applying to various crops.

Description

technical field [0001] The invention relates to a preparation method of a slow-release and long-acting chlorine-based nitrogen-potassium compound fertilizer. Composts that contain substances that affect the digestion of ammonium compounds or urea in the soil. Background technique [0002] Compound fertilizers with a chloride ion content of more than 3% are called chlorine-based compound fertilizers, because chlorine-based compound fertilizers have a negative impact on the growth of certain chlorine-avoiding crops, and the concentration of chloride ions in the soil remains in large quantities, which can easily cause soil compaction, salinization, alkalization. [0003] Therefore, in some populations, there is a technical bias for the application of chlorine-based fertilizers. Worried that the application of chlorinated fertilizers will have adverse effects on crop yield and quality, so they simply refused to use chlorine-based fertilizers because of choking. The developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05C3/00C05G5/30Y02P60/21C05C9/00C05D1/02C05D9/00C05D9/02
Inventor 邵明升吕瑞新解永军吕庆淮卢晓东郑兴芳陈列绒徐虹陈力
Owner SHIKEFENG CHEM IND
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