Method for making unbaked ceremsite from phosphogypsum

A technology of phosphogypsum and ceramsite, which is applied in the field of phosphogypsum to make non-fired ceramsite, which can solve the problems of environmental hazards, low utilization of phosphogypsum, low utilization rate, etc., achieve less equipment and labor investment, and reduce production and production costs , The effect of simple process method

Inactive Publication Date: 2019-03-15
仇心金
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Problems solved by technology

[0003] In order to overcome the above-mentioned shortcomings, the purpose of the present invention is to provide a method for making unfired ceramsite from phosphogypsum in the field, so as to solve the problem that the existing phosphogypsum has little utilization, low utilization rate, and is easy to cause harm to the environment. question

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  • Method for making unbaked ceremsite from phosphogypsum
  • Method for making unbaked ceremsite from phosphogypsum

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Embodiment Construction

[0015] Now in conjunction with accompanying drawing, the present invention will be further described.

[0016] Such as figure 1 As shown, the method for making unfired ceramsite from this phosphogypsum is as follows: after drying the phosphogypsum with a water content of 20%-30%, it is sieved or crushed to form a powder, and the phosphogypsum powder and cement are measured and mixed evenly After that, it is transported to the pelletizing disk by the conveyor, and the pelletizing disk rotates clockwise. The phosphogypsum powder and cement move in the opposite direction relative to the pelletizing disk under the action of the scraper machine of the pelletizing disk, and simultaneously with the rotation of the pelletizing disk. Spray water mist, make phosphogypsum powder and cement into balls, and transport them to Pingku through a belt conveyor to stack for natural curing for 72-120 hours, and then make unfired ceramsite products. In the above method, the ratio of phosphogypsum...

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Abstract

The invention relates to a method for making unbaked ceremsite from phosphogypsum. Key points of design are that the method comprises the following steps: drying phosphogypsum having moisture contentof 20-30%, screening or grinding to form powder, uniformly mixing the phosphogypsum powder and cement to obtain a mixture, feeding the mixture into a disc granulator, performing water spray granulation along with rotation of the disc granulator, and naturally curing for 72-120 hours after granulation, thereby making the unbaked ceremsite. The method disclosed by the invention has the advantages that 1, the doping amount of the phosphogypsum is high and can reach 70-85%, so that the phosphogypsum is fully utilized, and the utilization amount and utilization rate are improved; 2, the prepared ceremsite is high in quality and high in strength, particularly long-term strength; 3, the process method is simple and flexible, and matched making can be performed according to different application and different quality requirements of the ceremsite; and 4, the input of equipment and manual labor is low, and the making and production cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of ceramsite production, and relates to a method for making unfired ceramsite from phosphogypsum. Background technique [0002] At present, the annual discharge of phosphogypsum in the world is about 150 million tons or more, and the domestic annual discharge of phosphogypsum is about 50 million tons. The comprehensive utilization technologies of phosphogypsum in my country can be roughly divided into the following three types: one is chemical treatment methods, such as the preparation of sulfuric acid co-production cement, the preparation of ammonium sulfate, potassium sulfate by-product ammonium chloride, etc.; Gypsum powder and downstream stucco materials, gypsum blocks, gypsum boards, cement retarders, etc.; the third is the blending method, such as compound fertilizer fillers, soil conditioners for saline-alkali land, solidified filling mines, road construction stabilization layers, construction Hom materials and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02
CPCC04B28/02C04B14/365
Inventor 仇心金
Owner 仇心金
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