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Environment-friendly slow-release sulfur-based nitrogen potassium compound fertilizer

A compound fertilizer and slow-release fertilizer technology, which is applied in the direction of urea compound fertilizer, nitrogen fertilizer, potash fertilizer, etc., can solve the problems of high investment cost of high-tower granulation equipment, nitrogen fertilizer utilization rate of less than 30%, and rare compound slow-release fertilizers. , to achieve the effect of being conducive to ecological balance, beneficial to environmental protection, and avoiding high investment costs

Active Publication Date: 2013-06-19
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 sulfur-based compound fertilizers in the prior art is only 25% to 35%, and the utilization rate of nitrogen fertilizer is less than 30%, and the loss is particularly serious
The disadvantage is that the investment cost of high-tower granulation equipment is high, paraffin is a non-renewable fossil resource, and it is not easy to degrade in the soil
[0008] Environment-friendly sulfur-based nitrogen-potassium compound slow-release fertilizers are rare in the prior art

Method used

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  • Environment-friendly slow-release sulfur-based nitrogen potassium compound fertilizer
  • Environment-friendly slow-release sulfur-based nitrogen potassium compound fertilizer
  • Environment-friendly slow-release sulfur-based nitrogen potassium compound fertilizer

Examples

Experimental program
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Effect test

Embodiment 1

[0083] Prepare a kind of environment-friendly sulfur-based nitrogen-potassium compound slow-release fertilizer of the present invention according to the following steps

[0084] ①. Preparation of sulfur-based nitrogen and potassium compound fertilizer granules

[0085] First, after heating and melting 45 parts by weight of urea, 12 parts by weight of ammonium sulfate and 35 parts by weight of potassium sulfate 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;

[0086] ②.. stearic acid one-time coating

[0087] The consumption of stearic acid is 0.6%~1.2% of the mass of the chlorine-based nitrogen-potassium compound fertilizer granules prepared in step ①, and the coating method is as follows:

[0088] a. Preparation of molten stearic acid

[0089] After the stearic acid for coating is accurately measur...

Embodiment 2～ Embodiment 7

[0106] According to the method and steps of Example 1, according to the formula in Table 1, the environment-friendly sulfur-based nitrogen-potassium compound slow-release fertilizer of the present invention is prepared

[0107] Table 1

[0108] raw material Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 urea 50 40 51 43 57 31 ammonium sulfate 10 20 10 17 11 14 potassium sulfate 30 33 30 30 20 50 Granulation aid 10 7 9 10 12 6 water Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount

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

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

[0111] N element content % ≥18

[0112] K 2 O content % ≥10

[0113] Particle size mm 2~4.75mm

[0114] Moisture content wt% ≤ 2.0.

[0115] The environment-friendly su...

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Abstract

The invention discloses environment-friendly slow-release sulfur-based nitrogen potassium compound fertilizer and belongs to the compound fertilizer which contains material influencing digestion of ammonium compounds or urea in soil. The environment-friendly slow-release sulfur-based nitrogen potassium compound fertilizer is characterized by comprising the following steps of preparing sulfur-based nitrogen potassium compound fertilizer granules at first and then conducting once stearic acid and coating and secondary modified zeolite power application on the sulfur-based nitrogen potassium compound fertilizer granules to obtain the environment-friendly slow-release sulfur-based nitrogen potassium compound fertilizer, wherein the sulfur-based nitrogen potassium compound fertilizer granules comprise, by weight, 31-57 parts of urea, 10-20 parts of ammonium sulfate, 20-50 parts of potassium sulfate, 6-12 parts of granulation promoter, and appropriate water. The environment-friendly slow-release sulfur-based nitrogen potassium compound fertilizer prepared through the preparation method is good in slow-release effect, high in fertilizer utilization efficiency, simple in technology, low in production cost, beneficial to protection of the soil, the atmosphere and the water environment due to the fact that coating film material is prone to being degraded through microorganism in the soil, and wide in application range. The environment-friendly slow-release sulfur-based nitrogen potassium compound fertilizer is appropriate for grain crops, vegetables and fruits and used for seed fertilizer, base fertilizer and topdressing fertilizer. In addition, the environment-friendly slow-release sulfur-based nitrogen potassium compound fertilizer can be mixed with all kinds of market compound phosphoric fertilizer to be used.

Description

technical field [0001] The invention is an environment-friendly sulfur-based nitrogen-potassium composite slow-release 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. Compared with sulfur-based fertilizers, chlorine-based fertilizers have lower manufacturing costs and sales prices are significantly lower than sulfur-based fertilizers. However, due to the negative impact of chlorine-based compound fertilizers on the growth of some chlorine-avoiding crops, chloride-containing fertilizers such as potassium chloride and ammonium chloride should not be applied to saline-alkali soil and chlorine-avoiding crops. Chloride ions in chlorinated fertilizers will remain and accumulate in the soil, leading to soil acidification, and application in saline-alkali soil will aggravate s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/08A01C21/00C05G3/90
CPCC05B3/00C05C3/005C05B17/00C05G5/30Y02P60/21C05C3/00C05C9/00C05D1/02C05D9/02
Inventor 吕庆淮吕瑞新邵明升解永军吕晓东赵永强
Owner SHIKEFENG CHEM IND
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