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High-efficient particle ammonium sulfate and preparation method thereof

A technology of ammonium sulfate and granules, which is applied in the direction of ammonium salt fertilizer, nitrogen fertilizer, fertilizer mixture, etc., can solve the problems of poor appearance quality, low utilization rate, low sulfur content, etc., achieve low cost, low production cost, and improve granule strength Effect

Pending Publication Date: 2017-05-31
乔奖峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem solved by the present invention: provide a granular ammonium sulfate fertilizer that can be efficiently produced and its production process, using industrial by-product waste sulfuric acid, agricultural urea and water to mix as binder, ammonium bicarbonate and industrial by-product anhydrite Coating and granulating powdered ammonium sulfate for fillers, the product has good performance, and solves the problems of poor appearance quality, sulfur content below 24%, low utilization rate and high cost in the existing methods

Method used

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  • High-efficient particle ammonium sulfate and preparation method thereof
  • High-efficient particle ammonium sulfate and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Step 1. Add 1.5 parts by weight of sulfuric acid, 2 parts by weight of urea and 0.5 parts by weight of water in proportion to the acid preparation tank, mix and keep stirring, and keep the temperature at 70°C to make a colorless transparent liquid as a binder;

[0033] Step 2, after pulverizing 81 parts by weight of ammonium sulfate and 1.5 parts by weight of anhydrite to 100 mesh and sieving, mix and homogenize with 1.5 parts by weight of ammonium bicarbonate in a granulator, and fully disperse without caking;

[0034] Step 3. Atomize the binder described in step 1 and spray it on the surface of the mixed material obtained in step 2 in the granulator, mix and granulate, and maintain the granulation temperature at 60°C to obtain semi-finished granular ammonium sulfate.

[0035] Step 4. Stack the semi-finished granular ammonium sulfate prepared in step 3 for 8 hours at room temperature, and then send the stacked product into the drying kiln. The inlet temperature is 110°C...

Embodiment 2

[0038] Step 1. Add 1.95 parts by weight of sulfuric acid, 1.6 parts by weight of urea and 0.7 parts by weight of water in proportion to the acid preparation tank, mix and keep stirring, and keep the temperature at 85°C to make a colorless transparent liquid as a binder;

[0039] Step 2, crush 86 parts by weight of ammonium sulfate and 2 parts by weight of anhydrite to 100 mesh and sieve, mix and homogenize with 2 parts by weight of ammonium bicarbonate in a granulator, fully disperse without caking;

[0040] Step 3, atomize the binder described in step 1 and spray it on the surface of the mixture obtained in step 2 in the granulator, mix and granulate, and maintain the granulation temperature at 63°C to obtain semi-finished granular ammonium sulfate;

[0041]Step 4. Stack the semi-finished granular ammonium sulfate obtained in step 3 for 15 hours at room temperature, and then send the stacked product into a drying kiln. The inlet temperature is 115°C, the outlet temperature is ...

Embodiment 3

[0044] Step 1. Add 2.5 parts by weight of sulfuric acid, 3 parts by weight of urea and 1 part by weight of water in proportion to the acid preparation tank, mix and keep stirring, and keep the temperature at 80°C to make a colorless transparent liquid as a binder;

[0045] Step 2, crush 90 parts by weight of ammonium sulfate and 3 parts by weight of anhydrite to 100 mesh and sieve, mix and homogenize with 2.5 parts by weight of ammonium bicarbonate in a granulator, fully disperse without caking;

[0046] Step 3: Atomize the binder described in step 1 and spray it on the surface of the mixed material obtained in step 2 in the granulator, mix and granulate, and maintain the granulation temperature at 65°C to obtain semi-finished granular ammonium sulfate;

[0047] Step 4. Stack the semi-finished granular ammonium sulfate prepared in step 3 for 20 hours at room temperature, and then send the stacked product into a drying kiln. The inlet temperature is 120°C, the outlet temperature...

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Abstract

The invention provides high-efficient particle ammonium sulfate, which is prepared from the following raw materials in parts by weight: 80 to 90 parts of ammonium sulfate, 1.5 to 2.5 parts of sulfuric acid, 2 to 3 parts of urea, 1.5 to 2.5 parts of ammonium bicarbonate, 1.5 to 3 parts of anhydrite, and 0.5 to 1 part of water. The high-efficient particle ammonium sulfate provided by the invention has the following beneficial effects that the quality is high, the process conditions are simple, the production process is easy to control, various indexes of produced ammonium sulfate particles conform to the GB535-1995 standard, the granulation rate is improved from 70 percent to 90 percent, and a product has smooth particle appearance, the particle strength is larger than 25N, the particle size is ranged from 1.00 to 4.75mm, and the sulphur content is stabilized to be 24 percent or above; the cost is low, the raw materials used by the invention are waste sulfuric acid, byproduct anhydrite and other industrial byproducts so as to be cheap, the production cost is low, wastes can be turned into wealth, and the resource reuse is realized; in addition, during pelleting, reaction heat of complex acid and heat of a hot return product are utilized to enter a pelletizer, so that the steam required for pelleting is saved, and the energy consumption is saved.

Description

technical field [0001] The invention relates to a production process of ammonium sulfate granular fertilizer, in particular to a high-efficiency granular ammonium sulfate and a preparation method thereof. Background technique [0002] Sulfur is an indispensable nutrient element for plant growth and development. It is the main component of sulfur-containing amino acids and the raw material for the synthesis of various substances in cells. It also has significant effects in increasing crop yield and improving crop quality. Ammonium sulfate is referred to as ammonium sulfate, commonly known as fertilizer powder. Powdered ammonium sulfate is currently the most used sulfur fertilizer. It has high water content and fast nutrient release. It has been produced and applied for more than 100 years in my country. Ammonium sulfate contains nitrogen ( The theoretical value of N) is 21.2%, and the sulfur (S) content is 24.1%. It is a fertilizer containing nitrogen and sulfur nutrients. At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
CPCC05C3/00C05C9/00C05D3/02C05D9/02
Inventor 乔奖峰袁沁琳
Owner 乔奖峰
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