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Phosphogypsum Granulation System

A phosphogypsum and granulation technology, applied in the direction of granulation in static tanks/troughs, granulation of raw materials, chemical instruments and methods, etc., can solve the problems of low ball strength and easy pulverization, and achieve granulation Uniform, moderate strength, improving the effect of low ball strength

Active Publication Date: 2022-03-15
SINOCHEM YUNLONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a phosphogypsum granulation system to solve the ubiquitous problems of low ball strength and easy pulverization of phosphogypsum if no binder is added in the granulation process

Method used

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  • Phosphogypsum Granulation System
  • Phosphogypsum Granulation System
  • Phosphogypsum Granulation System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The pre-homogenized gypsum with a water content of 8% and the modified neutralizer are transferred from the phosphogypsum conveying leather conveyor 1 to the phosphogypsum mechanical unloading bin 2. At this time, the unloading bin door is closed, and the phosphogypsum mechanical unloading bin 2, the included angle between one wall surface and the horizontal plane is 90°, and the angles between the other three wall surfaces and the horizontal plane are 70°, 70° and 80° respectively. When the amount of phosphogypsum in the discharge bin reaches the predetermined value Finally, the discharge bin door is opened, the opening angle between the discharge plate and the discharge wall with hinged end is 120°, and the phosphogypsum enters the phosphogypsum high differential speed mixing granulator 3.

[0046] The high-speed rotor drive motor in the phosphogypsum high differential speed mixing granulator 3 drives the granulation rotor group (including granulation stirring blades, ...

Embodiment 2

[0050] The pre-homogenized gypsum with a water content of 11% and the modified neutralizer are transferred from the phosphogypsum conveyor belt conveyor 1 to the phosphogypsum mechanical discharge bin 2. At this time, the discharge bin door is closed, and the phosphogypsum mechanical discharge bin 2, the included angle between one wall surface and the horizontal plane is 90°, and the angles between the other three wall surfaces and the horizontal plane are 75°, 75° and 84° respectively. When the amount of phosphogypsum in the discharge bin reaches the predetermined value Finally, the door of the discharge bin is opened, and the opening angle between the discharge plate and the discharge wall with a hinged end is 135°, and the phosphogypsum enters the phosphogypsum high differential speed mixing granulator 3.

[0051] The high-speed rotor drive motor in the phosphogypsum high differential speed mixing granulator 3 drives the granulation rotor group (including granulation stirrin...

Embodiment 3

[0055] The pre-homogenized gypsum with a water content of 18% and the modified neutralizer are transferred from the phosphogypsum conveyor belt conveyor 1 to the phosphogypsum mechanical discharge bin 2. At this time, the discharge bin door is closed, and the phosphogypsum mechanical discharge bin 2, the angle between one wall surface and the horizontal plane is 90°, and the angles between the other three wall surfaces and the horizontal plane are 80°, 80° and 90° respectively. When the amount of phosphogypsum in the discharge bin reaches the predetermined value Finally, the door of the discharge bin is opened, and the opening angle between the discharge plate and the discharge wall with a hinged end is 155°, and the phosphogypsum enters the phosphogypsum high differential speed mixing granulator 3.

[0056] The high-speed rotor drive motor in the phosphogypsum high differential speed mixing granulator 3 drives the granulation rotor group (including granulation stirring blades,...

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Abstract

The invention discloses a phosphogypsum granulation system, which comprises a phosphogypsum conveying leather conveyor, a phosphogypsum mechanical unloading bin, a phosphogypsum high differential speed granulator, a granulator discharging and conveying leather conveyor, and a phosphogypsum granulator arranged in sequence. Granule screening machine, phosphogypsum ball semi-finished product conveying leather conveyor, the return material outlet of the granulation and screening machine is connected with the phosphogypsum mechanical discharge bin through the screening return material conveying leather conveyor and the screening return material elevator. The present invention is proposed on the basis of fully studying the material characteristics and granulation characteristics of phosphogypsum. It adopts a phosphogypsum high differential speed granulator without adding other binders, and can improve the existing granulation technology when it is applied to phosphogypsum. Common problems such as low ball strength and easy pulverization.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of phosphogypsum, in particular to a phosphogypsum granulation system. Background technique [0002] Phosphogypsum is a by-product of sulfuric acid extraction of phosphoric acid production, every 1tP produced 2 o 5 4.5-5.5 tons of phosphogypsum will be produced. Compared with natural gypsum, phosphogypsum contains a small amount of impurities such as insoluble phosphorus, soluble phosphorus, fluoride and organic matter, and cannot be directly utilized. [0003] Most foreign countries mainly deal with phosphogypsum by stockpiling. At present, there are huge phosphogypsum stockpiles in more than 50 countries including the United States, France, Brazil and Australia. The main method of processing phosphogypsum in my country is also the storage method, with an annual discharge of about 70 million tons, which brings huge pressure to the environment, society and phosphorus chemical companies....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J2/10B01J2/00
CPCB01J2/10B01J2/00Y02W30/91
Inventor 盛勇董建鹏陈少华马先林熊柏年张长明
Owner SINOCHEM YUNLONG