Long-effect compound fertilizer containing sulfur with high nitrogen, production method and application thereof

A compound fertilizer and long-acting technology, applied in urea compound fertilizers, nitrogen fertilizers, inorganic fertilizers, etc., can solve the problems of nitrogen content reduction and environmental pollution in compound fertilizers, and achieve the goal of increasing nitrogen content, protecting the environment, and low production costs Effect

Inactive Publication Date: 2009-09-02
WUHAN ZHONGDONG PHOSPHATE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of these components reduces the nitrogen content in compound fertilizers, and this contradiction needs to be resolved urgently.
[0004] Coal-fired boiler flue gas desulfurization by-product deposits, and wet process phosphoric acid solid waste - phosphogypsum, pollute the environment and need to be developed and utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] a. Raw material crushing: crush various raw materials separately, pass through a 60-120 mesh sieve, and set aside;

[0067] b. Preparation of granule component A (dihydrate gypsum modified urea granules): accurately weigh 60% of 60 parts by weight of the urea component=36 parts by weight, 20 parts by weight of gypsum dihydrate, and 60 parts by weight of 10 parts by weight of the additive component. %=6 parts by weight, including: 5.4 parts by weight of bentonite, 0.48 parts by weight of diatomaceous earth, 0.12 parts by weight of zinc sulfate borax (1:1) mixture, batching, mixing, granulating, drying, and sieving for subsequent use:

[0068] c. Preparation of particle component B (phosphate rock powder urea composite particles): accurately weigh 40% of 60 parts by weight of the urea component=24 parts by weight, 20 parts by weight of rock phosphate powder, and 40% of 10 parts by weight of the additive component =4 parts by weight, including: 3.6 parts by weight of bento...

Embodiment 2— Embodiment 6

[0072] According to the method and steps of Example 1, the formula in Table 1 is used to generate the sulfur-containing high-nitrogen long-acting compound fertilizer of the present invention.

[0073] Table 1

[0074] raw material Example 2 Example 3 Example 4 Example 5 Example 6 urea 55 65 52 57 63 CaSO 4· 2H 2 o 35 20 24 32 21 Phosphate rock powder 10 15 24 11 16 Bentonite 7.2 10.45 10.8 8.28 9.4 diatomite 0.56 0.44 0.96 0.63 0.48 Zinc sulfate 0.16 0.07 0.18 0.06 0.08 Borax 0.08 0.04 0.06 0.03 0.04

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PUM

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Abstract

The invention relates to a long-effect compound fertilizer containing sulfur with high nitrogen, a production method and application thereof and belongs to compound fertilizer. The compound fertilizer is characterized in that the compound fertilizer comprises the following raw material components (by weight portion): 50 to 65 portions of carbamide, 20 to 35 portions of dihydrate gypsum (CaSO4. 2H2O), 10 to 25 portions of phosphorite powder (counted by P2O5), and 8 to 12 portions of additives. The invention provides the long-effect compound fertilizer containing sulfur with high nitrogen, which takes industrial wastes as the raw material components, has high nitrogen content, contains S, Ca, P and other trace elements, and has good compatibility with the market-sold fertilizer. The compound fertilizer has the functions of slow release, durable fertilizer effect, high utilization rate, soil improvement and environment protection. The invention also provides the production method, which has the advantages of easy granulation, simple production process and low cost. The compound fertilizer and the method solve the technical problem of difficult granulation of the high-nitrogen compound fertilizer and broaden utilization paths for coal-fired boiler flue gas desulfurizing waste residues and wet-process phosphoric acid waste phosphogypsum.

Description

technical field [0001] The invention relates to a long-acting compound fertilizer containing sulfur and high nitrogen and a production method thereof. It belongs to compound fertilizer. Background technique [0002] Compound fertilizers are widely used due to their comprehensive nutrition and convenient application. Crop growth has the greatest demand for nitrogen fertilizer, and urea is a high-quality nitrogen fertilizer with the highest nitrogen content, and is often used as a nitrogen fertilizer component of compound fertilizers. However, the melting point of urea is only 135°C, and it is easy to absorb moisture and hydrolyze, which brings many troubles to the granulation process of high-nitrogen compound fertilizers, such as scarring and hanging on the wall, and low pelleting rate. Currently, it is difficult to produce compound fertilizers with a nitrogen content higher than 20%. In addition, the low fertilizer utilization rate, soil compaction, and environmental poll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05C9/00C05D3/02C05G3/80
CPCY02P60/21
Inventor 吕庆淮赵秉强石立岩吕瑞新
Owner WUHAN ZHONGDONG PHOSPHATE TECH
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