Method for processing phosphorus mud with ultrasonic wave to recycle yellow phosphorus

Abstract

The invention relates to the technical field of yellow phosphorus production, in particular to a method for processing phosphorus mud with ultrasonic wave to recycle yellow phosphorus. The method for processing the phosphorus with ultrasonic wave mud to recycle yellow phosphorus comprises the following steps of adding water into the phosphorus mud for dilution and stirring, and adjusting the pH of the slurry, processing the obtained the phosphorus mud slurry with ultrasonic wave, and then carrying out heat preservation treatment. According to the method, the device is simple, the purity of the recycled yellow phosphorus is high, no substance causing secondary pollution is introduced, operation is easy, energy consumption is low, and industrialization is easy to achieve.

Description

technical field [0001] The invention relates to the technical field of yellow phosphorus production, in particular to a method for recovering yellow phosphorus by ultrasonically treating phosphorus mud. Background technique [0002] Phosphorus mud is a milky colloidal substance. The colloidal substance formed by the mixture of organic matter, carbon black, and silica water in phosphorus mud forms a layer of solvation film protection layer on the surface of yellow phosphorus, which prevents yellow phosphorus particles from contacting each other and agglomerating, and yellow phosphorus cannot condense to form large particles. Droplets make it difficult to separate yellow phosphorus from phosphorus sludge. [0003] At present, the recovery methods of phosphorus sludge can be divided into phosphorus sludge burning acid method, physical separation and chemical separation. Phosphorus mud burning acid method is to burn phosphorus mud directly, and the phosphorus pentoxide generat...

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Problems solved by technology

The disadvantage of this method is that the quality of recovered phosphoric acid is poor, the content of impurities is high, and the recovery rate is low, and about 25% of phosphorus pentoxide contained in the caustic acid residue cannot be absorbed.

[0004] Physical separation is mainly through filtration separation, keeping the phosphorus sludge temperature above the melting point temperature, keeping the yellow phosphorus in a liquid state, and then separating the phosphorus sludge and yellow phosphorus by filtering. This method can recycle the phosphorus sludge, However, due to the frequent clogging of the filter cloth, it is difficult to carry out the production smoothly

[0005] There are mainly the following types of chemical separation: one is to use organic solvents for extraction and separation, and organic solvents are generally carbon disulfide or benzene; the other is to use soda ash or ammonia water to treat phosphorus sludge and let yellow phosphorus naturally condense and separate; the third is to use nitric acid and other oxidants to treat Phosphorus mud is used to condense yellow phosphorus. These methods all use external additives, which cause secondary pollution to varying degrees.