Anti-blocking agent for phosphogypsum as well as preparation method and use method of anti-blocking agent

An anti-caking agent and phosphogypsum technology, which is applied in the field of phosphogypsum, can solve the problems of non-property of hydration products and changing the characteristics of gypsum, and achieve the effect of good anti-caking effect, promotion of uniform dispersion and good hydrophobic effect

Pending Publication Date: 2022-03-25
YIDU XINGFA CHEM COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Publication No. CN1051719A adds steel slag powder to phosphogypsum, which has better strength and water resistance, but it fundamentally changes the characteristics of gypsum, and its hydration products no longer belong to the category of gypsum gel materials

Method used

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  • Anti-blocking agent for phosphogypsum as well as preparation method and use method of anti-blocking agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Raw material formula of anti-caking agent: the mass ratio of water, surfactant, film-forming agent and volatile solvent is 90:3:1:6.

[0028] During preparation, first heat water to 80°C, add surfactant Tween-80, stir until completely dissolved, stir evenly, stop heating, and cool to room temperature. Then add film-forming agent high hydrogen-containing silicone oil and volatile solvent ethanol and stir evenly to obtain.

[0029] Among them, water: the molecular formula of high hydrogen-containing silicone oil is (CH 3 ) 3 Si[(CH 3 )SiO][(CH 3 )(H)SiO 2 ] y Si(CH 3 ) 3 , hydrogen content 1.58-1.60%, viscosity, 25°C, 20-30mm2 / s, density, 25°C, 0.98-1.02g / cm 3 .

[0030] When using, put the prepared anti-caking agent into the sprayer, put the phosphogypsum in the mixer, spray the anti-caking agent on the surface of the phosphogypsum after stirring under the condition of stirring, the dosage of the anti-caking agent is 1% , so that the phosphogypsum and anti-caki...

Embodiment 2

[0032] Raw material formula of anti-caking agent: the mass ratio of water, surfactant, film-forming agent and volatile solvent is 90:3:1:6.

[0033] Heat water to 80°C, add surfactant sodium lauryl sulfate, stir until completely dissolved, stir evenly, stop heating, cool to room temperature, add film-forming agent high hydrogen-containing silicone oil, performance parameters are the same as those in Example 1 and Volatile solvent ethanol, after stirring evenly, put the prepared anti-caking agent into the sprayer, put the phosphogypsum in the mixer, spray the anti-caking agent on the surface of the phosphogypsum after stirring, The dosage of anti-caking agent is 1%, so that the phosphogypsum and anti-caking agent are mixed evenly.

Embodiment 3

[0035] When the anti-caking agent is used, the dosage is 0.5% of the phosphogypsum, and the rest are the same as in Example 2.

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Abstract

The invention provides an anti-blocking agent for phosphogypsum as well as a preparation method and a use method of the anti-blocking agent. The anti-blocking agent comprises the following raw materials in percentage by mass: 3-7% of a surfactant, 2-6% of a volatile solvent, 1-10% of a film-forming agent and the balance of water, wherein the film-forming agent is high-hydrogen-content silicone oil; the volatile solvent is ethanol and/or methanol. When the anti-blocking agent provided by the invention is used for preventing ardealite from blocking, the adding amount of the anti-blocking agent is 1-10% of that of ardealite, the anti-blocking agent is added in a spraying manner and then uniformly mixed, and the anti-blocking agent can effectively prevent ardealite from blocking, is added in a spraying manner, and is convenient to use and good in anti-blocking effect.

Description

technical field [0001] The invention relates to the technical field of phosphogypsum, in particular to an anti-caking agent for phosphogypsum, a preparation method and a use method thereof. Background technique [0002] Phosphogypsum is the solid waste generated when sulfuric acid is used to treat phosphate rock in the production of phosphoric acid to produce 1 ton of phosphoric acid (with 100% P 2 o 5 Total) will produce 4.8 to 5.0 tons of phosphogypsum. my country currently discharges about 20 million tons of phosphogypsum every year, with a cumulative discharge of nearly 100 million tons. It is the largest type of gypsum waste residue. The discharged phosphogypsum residue occupies a large amount of land and forms a slag mountain. [0003] In recent years, the stockpiling and comprehensive utilization of phosphogypsum has been paid attention at home and abroad. Because phosphogypsum contains certain attached water and crystal water, it is a metal salt of strong acid, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/05C09D7/20C09D7/63C09D7/65
CPCC09D183/04C09D7/20C09D7/63C09D7/65C08L71/00C08K5/41
Inventor 汪凤玲郑光明沈维云李防孙桦林祝贺赵春洋
Owner YIDU XINGFA CHEM COMPANY
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