A kind of wind quenching cooling method of yellow phosphorus slag

Abstract

The invention discloses a wind-quenching cooling method for yellow phosphorus slag, which comprises the following steps: the high-temperature slag from the phosphorus furnace is firstly cooled, the outlet air temperature is controlled at 600-900°C, and the cooling air adopts the second-stage cooling air for secondary cooling , and then the slag enters the secondary cooling for further cooling; when entering the secondary cooling, the material is in a semi-molten state, and the material temperature is about 800-1100 ° C. The secondary cooling is divided into two stages for cooling, and the temperature of the first cooling air is controlled at 600-900 ° C. The hot air from the same primary cooling is sent to the boiler to produce steam. The temperature of the secondary cooling air is controlled at 200-400°C, the temperature of the secondary cooling outlet material is 65-100°C, and the cooled slag goes downstream. The invention saves water resources. Energy consumption and labor costs are relatively reduced, which greatly reduces the production cost of yellow phosphorus.

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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