Method for improving appearance quality of granules made from diammonium phosphate slurry

A technology of diammonium phosphate and appearance quality, applied in the field of phosphate fertilizer and nitrogen fertilizer, can solve problems such as interfering with slurry performance, achieve the effect of round appearance, improve product grade, and improve product appearance quality

Active Publication Date: 2008-10-08
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current production process, the diammonium phosphate particles are made by granulating the slurry, and the fluctuation of the sl

Method used

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  • Method for improving appearance quality of granules made from diammonium phosphate slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1 selects sodium lauryl sulfate and sodium oleate to make surfactant

[0013] Add the same amount of sodium lauryl sulfate and sodium oleate into the melting tank, and control the temperature of the melting tank at 80°C to prepare a saturated solution of surfactant for later use; pump the surfactant solution to the slurry pump with a gear pump The suction port takes over the joint, enters the slurry and mixes it, and then sprays and granulates it. Slurry flow 60m 3 / h, the surfactant solution flow rate is 9.3kg / h.

[0014] In-process control: slurry neutralization degree 1.45-1.55; slurry density 1500-1600kg / m 3 ; Slurry temperature 110 ℃ ~ 125 ℃.

Embodiment 2

[0015] Embodiment 2 selects sodium cetyl sulfonate as surfactant

[0016] Add sodium cetyl sulfonate into the melting tank, and control the temperature of the melting tank at about 90°C to prepare a saturated surfactant solution for use; pump the melted surfactant to the suction port of the slurry pump with a gear pump , into the slurry mixing, spray granulation. Slurry flow 60m 3 / h, the surfactant solution flow rate is 100kg / h.

[0017] In-process control: slurry neutralization degree 1.45-1.55; slurry density 1500-1600kg / m 3 ; Slurry temperature 110 ℃ ~ 125 ℃.

Embodiment 3

[0018] Embodiment 3 Select sodium dodecylbenzenesulfonate, sodium oleate and sodium stearate as surfactants

[0019] Add the same amount of sodium dodecylbenzenesulfonate, sodium oleate and sodium stearate into the melting tank, control the temperature of the melting tank at about 80°C, prepare a saturated surfactant solution for later use; put the melted surfactant Use a gear pump to pump it to the suction port of the slurry pump, enter the slurry and mix it, and then spray the slurry to granulate. Slurry flow 60m 3 / h, the surfactant solution flow rate is 930kg / h.

[0020] In-process control: slurry neutralization degree 1.45-1.55; slurry density: 1500-1600kg / m 3 ;Slurry temperature: 110℃~125℃.

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Abstract

Disclosed is a method for improving the appearance quality of a formed diammonium phosphate slurry particle, which relates to a fertilizer containing ammonium salts, the method uses surface active agents to change the gas-liquid interfacial tension and viscosity of slurry so as to improve the particle sphericity and homogeneity when in diammonium phosphate slurry granulation, thereby reaching the purpose of improving the product appearance quality of diammonium phosphate particles; the method has the detailed technical proposal that: proper surface active agents or combinations thereof are firstly selected, and the surface active agents or combinations thereof are then prepared into a saturation solution; and then the solution is pumped to the pipe-connecting part of a suction inlet of a slurry pump by a gear pump, and the slurry-spraying granulation can be implemented after the solution enters the slurry for mixing. Using the method of the invention and adding the surface active agents to the slurry can largely reduce the gas-liquid interfacial tension and viscosity of the diammonium phosphate slurry by only consuming a little amount thereof, then the solution can be adapted to the size required by the granulation technique, and medium-sized particles do not stick to one another or seldom stick to one another in the granulation process, thereby ensuring the roundness, smoothness, uniformity and cleanness of the diammonium phosphate particle appearance and improving the product appearance and product grade.

Description

technical field [0001] The invention relates to a phosphate fertilizer and a nitrogen fertilizer, and further relates to a fertilizer containing ammonium salt, in particular to a method for improving the appearance quality of a diammonium phosphate fertilizer product. Background technique [0002] Diammonium phosphate is a nitrogen-phosphorus compound fertilizer, and its products are mostly granular. Whether the diammonium phosphate particles are round, uniform and smooth is an important indicator of product appearance quality, which directly affects product image and sales. In the current production process, the diammonium phosphate particles are made by slurry granulation, and the fluctuation of the slurry composition always interferes with the stability of the slurry performance. Factors such as slurry composition, operation control, equipment and technological level, and slurry viscosity will all affect the roundness of particles, that is, affect the appearance quality ...

Claims

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Application Information

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IPC IPC(8): C05B7/00C05G5/00
Inventor 曾祥钦黄进谢燕李焱金先煜喻仕瑞郭妤杨国行杨毅赵建勇罗焕虎
Owner WENGFU (GRP) CO LTD
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