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Method for preparing particle ammonium sulfate product by organic-inorganic binder

A technology of inorganic binder and organic binder, which is applied in the application, ammonium salt fertilizer, nitrogen fertilizer and other directions, can solve the problem of inability to produce large-particle ammonium sulfate, and achieve the improvement of product market competitiveness, simple production process and uniform particle size. Effect

Active Publication Date: 2009-11-04
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-inorganic binders in the production of large-grained ammonium sulfate

Method used

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  • Method for preparing particle ammonium sulfate product by organic-inorganic binder
  • Method for preparing particle ammonium sulfate product by organic-inorganic binder

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Example 1 prepares granular ammonium sulfate with a single organic binder and a single inorganic binder

[0020] Use polyacrylamide with a molecular weight of 12 million as the organic binder, and diammonium phosphate as the inorganic binder, and grind them to 20-200 meshes for later use; use ≤2mm ammonium sulfate crystals (the active ingredients are N: 20.4%, S: 23.58%, H 2 O: 0.8%) is crushed to 20-200 mesh by a pulverizer; the crushed diammonium phosphate and crushed ammonium sulfate are evenly added into the granulator after metering; the organic solvent polyacrylamide solution dissolved in the solvent tank is mixed with the medium The pressure steam is sprayed in the granulator for granulation, the added amount is: the ratio of polyacrylamide to ammonium sulfate is 5:965, the ratio of diammonium phosphate to ammonium sulfate is 30:965; after that, it is sprayed by medium pressure steam Granulation, the granulation temperature is 120℃~160℃; it is dried by two-stage...

example 2

[0021] Example 2 Organic binder mixes with any ratio of inorganic binder to prepare granular ammonium sulfate product

[0022] The procedure is the same as that in Example 1, and the polyacrylamide with a molecular weight of 12 million and polyethylene glycol (PEG600) are mixed in a ratio of 1:1 as an organic binder, dissolved and mixed evenly. Then mix magnesium sulfate monohydrate and diammonium phosphate according to 1:1 or any ratio evenly, control the organic-inorganic binder to account for 1% of the total mass fraction; dissolve and mix evenly and add to the granulator, control the ratio and process operation parameters , to produce 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

A method for preparing particle ammonium sulfate product by organic-inorganic binder, comprises the following steps: (1) polyacrylamide, polyethylene glycol and polyvinyl alcohol are selected to be organic binder; monoammonium phosphate, diammonium phosphate, ammonium bicarbonate, magnesium sulfate monohydrate, magnesium sulfate hetahydrate and heptahydrate zinc sulphate are selected to be inorganic binder; (2) crystal ammonium sulfate is crashed; (3) the one or more organic binder is dissolved, mixed evenly with the one or more inorganic binder in a solution pump and a pelletizer, and is sprayed with steam or water on the surface of ammonium sulfate to carry out pelleting to obtain semi-finished product; (4) the semi-finished product is dried; (5) dried finished product is screened after inspected particles with suitable particle sizes are selected to be the product. The invention has the following advantages: (1) the process is simple, thus facilitates operation; (2) the binder is accessible, and the product has uniform particle sizes with strength being suitable for large scale mechanized operation; (3) the mixture ratio of the binder is free, thus being capable of satisfying large scale mechanized operation. The invention is suitable for popularization in compound fertilizer production.

Description

technical field [0001] The present invention relates to chemical fertilizer products, more specifically, to the production of ammonium sulfate, in particular to a method for producing granular ammonium sulfate with an organic-inorganic 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 particle flu...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G5/00C05C3/00
Inventor 王邵东李红林王飞禹志宏杨喆
Owner WENGFU (GRP) CO LTD
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