The present disclosure provides a method for producing value-added by-product yellow phosphorus slag through an unconventional electric furnace process, derived from yellow phosphorus. This method is related to the technical field of comprehensive utilization of mineral resources. The disclosed method involves the following steps: mixing mid-low-grade phosphate rock, silica, coke, and a cosolvent to create a blended material, subjecting the blended material to high-temperature reduction in a yellow phosphorus electric furnace to yield yellow phosphorus and water-quenched slag, and then drying the water-quenched slag using yellow phosphorus tail gas to obtain the yellow phosphorus slag. According to this disclosure, a P.sub.2O.sub.5CaOSiO.sub.2MgOR multi-component system is established using the blended material.

The present disclosure provides a method for producing value-added by-product yellow phosphorus slag through an unconventional electric furnace process, derived from yellow phosphorus. This method is related to the technical field of comprehensive utilization of mineral resources. The disclosed method involves the following steps: mixing mid-low-grade phosphate rock, silica, coke, and a cosolvent to create a blended material, subjecting the blended material to high-temperature reduction in a yellow phosphorus electric furnace to yield yellow phosphorus and water-quenched slag, and then drying the water-quenched slag using yellow phosphorus tail gas to obtain the yellow phosphorus slag. According to this disclosure, a P.sub.2O.sub.5CaOSiO.sub.2MgOR multi-component system is established using the blended material.

The present invention relates to a process for continuous purification of yellow phosphorus by adsorption onto activated carbon.

The present invention relates to a process for continuous purification of yellow phosphorus by adsorption onto activated carbon.

A method, apparatus and special phosphorus recovery device for recovering yellow phosphorus from an electric furnace phosphorus-producing furnace gas without the use of a spray cooling mode during the condensation of the electric furnace phosphorus-producing furnace gas. The method comprises the steps: 1) dedusting and purifying the electric furnace phosphorus-producing furnace gas by using a dry-type dedusting system, so that the solid content of the electric furnace phosphorus-producing furnace gas in less than or equal to 10-50 mg/m.sup.3; 2) conveying the purified furnace gas to a phosphorus recovery device, the phosphorus recovery device being provided with a heat exchange chamber formed by a shell and a recuperator arranged inside the heat exchange chamber; 3) feeding into an internal flow path of the recuperator a low-temperature medium, which conducts non-mixed heat transfer with the furnace gas under the isolation of the recuperator, so that the yellow phosphorus is condensed, separated out, and then vastly attached to the surface of the recuperator, and the tail gas arising from heat exchange is discharged out of the phosphorus recovery device; and 4) feeding a high-temperature medium for replacing the low-temperature medium into the internal flow path of the recuperator.

A method, apparatus and special phosphorus recovery device for recovering yellow phosphorus from an electric furnace phosphorus-producing furnace gas without the use of a spray cooling mode during the condensation of the electric furnace phosphorus-producing furnace gas. The method comprises the steps: 1) dedusting and purifying the electric furnace phosphorus-producing furnace gas by using a dry-type dedusting system, so that the solid content of the electric furnace phosphorus-producing furnace gas in less than or equal to 10-50 mg/m.sup.3; 2) conveying the purified furnace gas to a phosphorus recovery device, the phosphorus recovery device being provided with a heat exchange chamber formed by a shell and a recuperator arranged inside the heat exchange chamber; 3) feeding into an internal flow path of the recuperator a low-temperature medium, which conducts non-mixed heat transfer with the furnace gas under the isolation of the recuperator, so that the yellow phosphorus is condensed, separated out, and then vastly attached to the surface of the recuperator, and the tail gas arising from heat exchange is discharged out of the phosphorus recovery device; and 4) feeding a high-temperature medium for replacing the low-temperature medium into the internal flow path of the recuperator.

The disclosure relates to a method for purifying yellow phosphorus including bringing yellow phosphorus and wood-based activated carbon into contact with each other. The disclosure also relates to a method for producing high-purity phosphoric acid including generating a gas of phosphorus pentoxide by burning yellow phosphorus obtained by the purifying method and then hydrating the gas.

The disclosure relates to a method for purifying yellow phosphorus including bringing yellow phosphorus and wood-based activated carbon into contact with each other. The disclosure also relates to a method for producing high-purity phosphoric acid including generating a gas of phosphorus pentoxide by burning yellow phosphorus obtained by the purifying method and then hydrating the gas.