Drying device for metallurgical raw materials and drying method applying drying device

Abstract

The invention provides a drying device for metallurgical raw materials. The drying device comprises a separator and a vertical drying furnace, wherein a feeding device is mounted at a first feed opening of the vertical drying furnace; a gas inlet of the vertical drying furnace is connected with an external hot gas source; a gas outlet of the vertical drying furnace communicates with a gas inlet of the separator through a pipeline; a gas outlet in the top of the separator is connected with a flue; and a discharge opening in the bottom end of the separator communicates with a second feed opening in the lower part of the vertical drying furnace through a pipeline. According to the drying device for the metallurgical raw materials, the metallurgical raw materials are subjected to drying treatment in the vertical drying furnace through the hot air source and then are subjected to gas-solid two-phase separation in the separator, separated gas is discharged through the flue, and solid materials are discharged into the vertical drying furnace. The drying device is simple in design and convenient to operate and control, the drying effect of the metallurgical raw materials is very good, and metallurgical raw materials that are carried in the gas after drying are recycled to prolong the service life of follow-up dust removal equipment.

Description

technical field [0001] The invention belongs to the technical field of smelting, and in particular relates to a drying device for metallurgical raw materials and a drying method using the device. Background technique [0002] In the pyrometallurgical process, smelting raw materials generally need to be dried, but drying consumes a lot of energy, accounting for a considerable part of the comprehensive energy consumption of smelting. However, the flue gas temperature of some pyrometallurgical smelting processes is very high, such as Corex ironmaking process, converter steelmaking process, flash smelting smelting process, etc. Some technicians try to use the flue gas from smelting to dry smelting raw materials to reduce energy consumption , but many problems remain unresolved. The following takes flash smelting as an example to illustrate related issues: [0003] At present, the conventional drying methods for flash smelting raw materials include rotary kiln drying, airflow d...

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Problems solved by technology

[0004] In the latest smelting and drying technology, flash furnace exhaust gas is used to directly dry smelting raw materials, but the disadvantage is that the high-temperature flue gas above 1200 °C will cause the material to melt and bond to the furnace wall, resulting in equipment failure. In addition, due to The flow rate of the flue gas is fast, and some raw materials will be taken away after drying, so that the dust rate in the flue gas is too high, which will affect the service life of the subsequent dust collection equipment

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