Method for cooling yellow phosphorus furnace slags by air quenching

Abstract

The invention discloses a method for cooling yellow phosphorus furnace slags by air quenching, which comprises the following steps: carrying out primary cooling on high-temperature furnace slags discharged from a phosphorus furnace, controlling the temperature of outlet air at 600-900 DEG C, taking two-stage cooling air cooled two times as cooling air, and carrying out secondary cooling on the cooling slags so as to further cool the cooled slags, wherein materials in a secondary cooling mode are in a semi-molten state, the temperature of the materials is about 800-1100 DEG C, the secondary cooling is implemented in two stages, the temperature of a first-stage cooling air is controlled at 600-900 DEG C, hot air cooled in the same time is conveyed to a boiler to generate steam, the temperature of a second-stage cooling air is controlled at 200-400 DEG C, the temperature of the materials at a secondary cooling outlet is 65-100 DEG C, and the cooled furnace slags are conveyed to downstream places. According to the invention, water resources are saved, the energy consumption and the labor cost are relatively reduced, and the production cost of yellow phosphorus is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to an air quenching cooling method for yellow phosphorus slag. Background technique [0002] With the scarcity of resources and the advancement of technology, the utilization of slag produced by yellow phosphorus production has attracted more and more attention. At present, it is mainly used in industries such as building materials and agricultural fertilizers. After the high-temperature molten slag produced in the production process of yellow phosphorus is discharged from the phosphorus furnace, it is currently treated by the water quenching process, that is, the slag is quenched. The high-temperature slag breaks due to internal stress, and becomes small particles of slag that are dispersed in the slag pool to facilitate the shipment and storage of the slag. [0003] However, the slag will produce a large amount of water vapor during the water quenching proce...

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Problems solved by technology

[0003] However, the slag will produce a large amount of water vapor during the water quenching treatment, which will have a certain impact on the equipment, buildings and environment of the yellow phosphorus plant, and at the same time, the heat energy in the slag will not be utilized.

The production water consumption is large, the slag needs to be dried in the subsequent utilization process, and the energy consumption and labor cost are high

The water-quenched slag needs to grab the slag and drive the car to grab the hopper to filter out part of the water, and then use the car to transport it to the raw material storage yard of the downstream device, and the transshipment fee is relatively high

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