US 2026/0158532 A1 · HARMLESS-TREATMENT CHEMICAL AGENT FOR PHOSPHOGYPSUM AND ENGINEERING APPLICATION METHOD THEREOF

Abstract

The present invention belongs to the technical field of solid waste treatment and disposal, concerning a harmless-treatment chemical agent for phosphogypsum and an engineering application method thereof. The chemical agent consists of a powder component and a liquid component, the powder component consists of an alkaline component and talc powder, and the alkaline component is at least one of calcium oxide, magnesium oxide, calcium hydroxide and magnesium hydroxide; the liquid component is an aqueous solution of at least one of a soluble iron salt, a soluble aluminum salt and a soluble calcium salt. The engineering application method comprises: S1 breaking and sieving phosphogypsum into a particle size of 1-5 mm, meanwhile adjusting a content of adsorbed water to 5-10%; S2 mixing evenly the pretreated phosphogypsum with the powder component; S3 adding a liquid component and adjusting a content of adsorbed water to 12-20%; and S4 maintenance and preparation for inspection. It is possible to make full use of the synergistic effects of the components by combining the powder component with the liquid component, and realize a more environmentally friendly and efficient engineering application by adding and mixing the powder and liquid components step by step.

Claims14

Dependent claims

A harmless-treatment chemical agent for phosphogypsum consisting of a powder component and a liquid component,

wherein the powder component consists of an alkaline component and talc powder, and the alkaline component is at least one of calcium oxide, magnesium oxide, calcium hydroxide and magnesium hydroxide;
the liquid component is an aqueous solution of at least one of a soluble iron salt, a soluble aluminum salt and a soluble calcium salt;
wherein in the powder component, a weight ratio of the alkaline component to the phosphogypsum to be treated is 0.2%˜1.0%;
a weight ratio of the talc powder to the phosphogypsum to be treated is 0.1%˜0.6%;
a weight ratio of the liquid component, calculated as solids, to the phosphogypsum to be treated is 0.2˜0.6%.

2 more elements

An engineering application method of a harmless-treatment chemical agent for phosphogypsum consisting of a powder component, which consists of an alkaline component selected from at least one of calcium oxide, magnesium oxide, calcium hydroxide and magnesium hydroxide, and talc powder, and a liquid component, which is an aqueous solution of at least one of a soluble iron salt, a soluble aluminum salt and a soluble calcium salt;

comprising:
S1 a step of pretreating phosphogypsum, including the processes of breaking and sieving phosphogypsum into a particle size of 1-5 mm, meanwhile adjusting a content of adsorbed water to 5-10%, so as to obtain pretreated phosphogypsum;
S2 a step of adding a powder component, including the process of mixing evenly the pretreated phosphogypsum obtained in step S1 with the powder component of the harmless-treatment chemical agent for phosphogypsum, so as to obtain a mixture;
S3 a step of adding a liquid component, including the processes of adding the liquid component of the harmless-treatment chemical agent for phosphogypsum to the mixture obtained in step S2, and adjusting a content of adsorbed water to 12-20%, so as to obtain a material;
and
S4 a step of maintenance and preparation for inspection, including the processes of piling the material obtained in step S3 for maintenance and maintaining moisture of the material to enable sufficient reaction, then carrying out comprehensive utilization as needed after achievability to a standard.

3 more elements

Dependencies are inferred from the claim text.

Harmless-treatment chemical agent for phosphogypsum and engineering application method thereof

Life of this patent

Harmless-treatment chemical agent for phosphogypsum and engineering application method thereof

Life of this patent

Abstract

Claims14