Dust suppression device and dust suppression method during molten iron open-air transportation

Abstract

The invention discloses dust suppression device and dust suppression method during molten iron open-air transportation. The dust suppression device comprises an inert gas nozzle and a gas supply device, wherein the gas supply device is used for supplying pressure inert gas for the inert gas nozzle, and the inert gas nozzle is distributed at the upper part of a molten iron transportation port overagainst is a molten iron open-air flowing region; the inert gas nozzle structure is adopted by the invention, the air in the molten iron transportation region is isolated or blown away by the inert gas, so that the open-air molten iron in the molten iron transportation region can not be oxidized by the oxygen in the air, and the generation of iron oxide grains is reduced and even eliminated, thereby reducing the generation of smoke and dust and having better dust suppression effect; because of the reduction of the smoke and the dust, the power consumption and the maintenance and repair cost of a dust collecting system are lowered; meanwhile, because the generation of the iron oxide grains is reduced and even eliminated, the metal yield of the molten iron is improved, and the production cost is lowered; the device of the invention has the advantages of simple structure and low manufacturing and installation cost; and because the inert gas is easily obtained for an iron and steel enterprise, the operating cost is relatively lower.

Description

technical field [0001] The invention relates to an environmental protection device for transferring molten iron, in particular to a device and method for suppressing smoke generated during the transfer of molten iron. Background technique [0002] In the iron and steel smelting process, the molten iron needs to be transferred by pouring cans. For example, in the blast furnace casting plant, the molten iron flows from the blast furnace through the iron trench into the torpedo tanker; the converter is mixed with molten iron, and the molten iron flows from the ladle into the converter; Processes such as molten iron and molten iron pouring. During these processes, the high-temperature molten iron is in direct contact with the air, and the oxygen in the air reacts with the molten iron to produce a large amount of smoke and dust rich in iron oxide particles, which not only pollutes the production and operation environment of the steel workshop, but also reduces the metal yield. ...

AI Technical Summary

Problems solved by technology

Although the above measures can suck out the smoke and dust, the initial investment of these dust removal systems is relatively high. For example, the dust removal system of a blast furnace accounts for 4% of the total investment; and the operation of the dust removal system requires high operating costs, including power, maintenance and repair costs, etc.; In particular, this dust removal method will relatively reduce the metal yield of molten iron, resulting in an increase in production costs

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