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Slow release type azophoska compound fertilizer and production method thereof

A compound fertilizer, nitrogen, phosphorus and potassium technology, applied in the direction of urea compound fertilizer, nitrogen fertilizer, potassium fertilizer, etc., can solve the problems of unreasonable adjustment of fertilizer components, pollution of soil and natural environment, unsatisfactory slow release effect, etc., and achieve low manufacturing cost , improving soil and protecting the environment

Active Publication Date: 2009-08-12
SHIKEFENG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The slow-release fertilizers in the prior art rely on single-layer or multi-layer coatings, or simply add inhibitors to control the release rate of fertilizer nutrients, and the slow-release effect is not ideal; there are incomplete nutrients and fertilizer components. The adjustment is unreasonable, and the manufacturing process is complicated and the cost is high; there are many problems such as pollution to the soil and the natural environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] a. Phosphogypsum preparation: dry the phosphogypsum until the moisture content is less than 8%, crush it through a 20-mesh sieve, and set aside;

[0050] b. Preparation of phosphogypsum, fly ash slow-release composition: according to the proportioning of phosphogypsum: fly ash=1:0.5-1 (parts by weight), accurately weigh the phosphogypsum and fly ash prepared in step a and The other components are evenly prepared and set aside;

[0051] c. Potassium ore powder is crushed, passed through a 60-100 mesh sieve, and set aside;

[0052] d. Ingredients and granulation: Accurately weigh 40 parts by weight of phosphogypsum prepared in step b, the fly ash slow-release composition, 20 parts by weight of urea, 20 parts by weight of acidified phosphate rock powder with hydrochloric acid, 1.5 parts by weight of potassium mineral powder, nitric acid 7.5 parts by weight of potassium, 6 parts by weight of potassium chloride, 1 part by weight of benzoquinone, 1 part by weight of dicyandi...

Embodiment 2— Embodiment 6

[0056] According to the method and steps of Example 1, the slow-release nitrogen, phosphorus and potassium compound fertilizer of the present invention is prepared according to the formula in Table 1

[0057] Table 1

[0058] raw material Example 2 Example 3 Example 4 Example 5 Example 6 Phosphogypsum, fly ash sustained release composition 15 20 30 50 5 urea 30 40 15 10 35 Hydrochloric acid acidified phosphate rock powder 40 15 43 10 18 Potassium mineral powder 1 1 1.5 2.5 7 potassium nitrate 10 8.5 7.5 15 potassium chloride 9 9 15 13 Benzoquinone 0.5 0.75 0.2 1 0.5 Dicyandiamide 0.5 0.75 0.3 1 1.5 Zinc sulfate 2 1.5 0.5 0.5 2 Borax 1 0.5 0.5 1.5 1.5 Ammonium molybdate 1 1.5 0.5 1 1.5

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Abstract

The invention relates to a slow-release type nitrogen-phosphorus-potassium composite fertilizer and a production method thereof, belonging to a composite fertilizer with slow-release type nutrient. The composite fertilizer is characterized by comprising the following components by weight portions: 5 to 50 of slow-release composition of phosphogypsum and fly ash, 10 to 40 of urea, 10 to 45 of hydrochloric acidified phosphate rock powder, 10 to 35 of mixed potassic fertilizer, 0.5 to 2.0 of slow-release agent and 1 to 5 of trace element compound. The raw materials are mixed evenly, the conventional auxiliary materials are added for granulation, and then lamination is carried out so as to obtain the composite fertilizer. The invention provides an ideal slow-release type nitrogen-phosphorus-potassium composite fertilizer which has comprehensive nutrients, scientific and reasonable matching and slow rate of fertilizer decomposition and nutrient release, is in conformity with the absorption rate of plants for nutrients, can improve the yield and quality of agriculture product, improve utilization rate of fertilizer, reduce rate of fertilizer application and agricultural production cost, and is beneficial to protection of soil and natural environment and a production method thereof.

Description

technical field [0001] The invention relates to a slow-release nitrogen, phosphorus and potassium compound fertilizer and a production method thereof. It is a mixed fertilizer with slow release of nutrients. Background technique [0002] Chemical fertilizers provide the necessary nutrients for the growth of crops, play a vital role in the yield and quality of agricultural products, occupy a large share in the investment in the agricultural industry, and tend to have adverse effects on the soil environment and the natural environment. Therefore, the combination of nutrients is scientific and reasonable to match the growth needs of plants; the nutrients are released slowly to adapt to the absorption rate of nutrients by plants; the rate of fertilizer degradation and nitrification is slowed down to reduce fertilizer leaching and NO, NO 2 , NH 3 The gas form enters the atmosphere, thereby improving the utilization rate of fertilizers; chemical fertilizers and their manufacturi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G1/00C05C9/00C05B17/00C05D9/02C05D1/00C01B7/01
CPCY02P60/21
Inventor 吕庆淮孙运生
Owner SHIKEFENG CHEM IND
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