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Method for producing ammonium sulphate grain products by using organic caking agent

A technology of organic binder and ammonium sulfate, which is applied in the fields of application, ammonium salt fertilizer, nitrogen fertilizer, etc., can solve the problems of not being able to produce large particles of ammonium sulfate, and achieve the effects of improving product market competitiveness, easy operation, and uniform particle size

Active Publication Date: 2011-10-05
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No. 00104473.7 filed by Ningxia Zhang Mingan discloses a method for a small nitrogen fertilizer factory to use gypsum as raw material to produce ammonium sulfate and carbonate gas fertilizer. It mentions that the calcium carbonate containing ammonium sulfate in the binder is directly dried and compounded with the binder Produce carbonic acid fertilizer, but cannot be used for the production of large granular ammonium sulfate
There is no report on the use of organic binders in the production of large-grained ammonium sulfate

Method used

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  • Method for producing ammonium sulphate grain products by using organic caking agent
  • Method for producing ammonium sulphate grain products by using organic caking agent

Examples

Experimental program
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Effect test

example 1

[0019] Example 1 single organic binder produces granular ammonium sulfate

[0020] Polyacrylamide with a molecular weight of 12 million is selected as the organic binder. Ammonium sulfate crystals ≤ 2mm (active ingredients are N: 20.4%, S: 23.58%, H 2 O: 0.8%) is pulverized to 20-200 mesh by a pulverizer; then add the organic binder polyacrylamide solution dissolved in the solvent tank, the ratio of polyacrylamide to ammonium sulfate is 5 / 995, so that the organic binder The mass fraction is 0.5% of the total amount of materials; after that, granulation is carried out by medium-pressure steam spraying, and the granulation temperature is 120°C to 160°C; it is dried by a two-stage dryer, the temperature of the first stage is 220°C to 280°C, and the second stage is dried The temperature is 180 ℃ ~ 240 ℃ for drying; after cooling, use a sieving machine to sieve, select particles with a particle size of 1 ~ 5mm as ammonium sulfate products, pass the inspection, and pack them for de...

example 2

[0021] Example 2 organic binder mixes and prepares granular ammonium sulfate

[0022] The procedure is the same as in Example 1, and polyacrylamide with a molecular weight of 12 million and polyethylene glycol (PEG600) are mixed in a ratio of 1:1 as an organic binder. The binder accounts for 1% of the total mass fraction, is dissolved and mixed evenly and added to the granulator, and the ratio and process operation parameters are controlled to obtain qualified granular ammonium sulfate products.

[0023] The following table lists the process parameters and product quality details

[0024] Table 1 list of process parameters

[0025]

[0026] Table 2 List of final product quality indicators

[0027]

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Abstract

The invention discloses a method for producing ammonium sulphate grain products by using an organic caking agent, which comprises the steps of: (1) selecting one or mixture of polyacrylamide, polyethyleneglycol, and polyvinyl alcohol as the organic caking agent for producing large ammonium sulphate grains; (2) crushing the ammonium sulphate crystals; (3) dissolving the organic caking agent and conveying the liquid into a pelletizer through a pump, spraying the liquid together with steams or water onto the surface of the powder ammonium sulphate for pelleting and obtaining the semi-finished products; (4) drying the semi-finished products; and (5) screening the dried finished products according to the moisture indexes and granularity requirements, and finally selecting the grains with propergranularity as the product and packaging after the dried finished products are inspected to be qualified. The method for producing ammonium sulphate grain products by using the organic caking agent has the advantages that: (1) the technique is simple and the operation is convenient; (2) the caking agent is easy to be obtained and the weight percentage of the product nutrition is above 90 percent,the granularity is uniform and the strength is suitable for large mechanized operation; and (3) the organic caking agent is free to be mixed according to the granulating requirement, and can meet large mechanized production. The method for producing ammonium sulphate grain products by using the organic caking agent is suitable to be popularized and used in producing compound fertilizers.

Description

technical field [0001] The present invention relates to chemical fertilizer product, further specifically, relates to the production of ammonium sulfate, relate in particular to the method for producing granular ammonium sulfate with organic binder. Background technique [0002] With the development of market economy, the development of large-scale agricultural mechanization is getting faster and faster. In recent years, granular fertilizers have been favored by customers, and their prices are much higher than traditional forms of fertilizers. As the earliest nitrogen fertilizer ammonium sulfate on the market, the current crystal form cannot meet the requirements of agricultural mechanized fertilization. [0003] Among existing Chinese patent applications, No. CN1051711 of Japanese application discloses a kind of preparation method of large granular ammonium sulfate, but fails to be popularized vigorously; No. CN88102293A of Dutch application discloses granulation in partic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05C3/00
Inventor 王邵东李红林王飞禹志宏杨喆
Owner WENGFU (GRP) CO LTD
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