Blast furnace slag-iron separation device, slag-iron separation method and discharged blast furnace slag-iron recovery method

Abstract

The invention discloses a blast furnace slag-iron separation device, a slag-iron separation method and a discharged blast furnace slag-iron recovery method. The blast furnace slag-iron separation device comprises a slag-iron runner, a molten iron runner and a slag runner, wherein the slag-iron runner is connected with a tap hole of a blast furnace, the molten iron runner with a skimmer is used for connecting the slag-iron runner and an iron container, and the slag runner is used for connecting the slag-iron runner and the slag container. The separation device further comprises an iron settling tank, a small tap hole, a molten iron lateral runner and a stopper. The slag-iron separation method employs the blast furnace slag-iron separation device to separate effluent from the tap hole of the blast furnace so as to obtain slag and molten iron while the blast furnace skimmer is disabled. The discharged blast furnace slag-iron recovery method employs the blast furnace slag-iron separation device to recover the molten iron in the slag with rich iron.

Description

technical field [0001] The invention relates to the separation step of blast furnace slag and iron in the blast furnace production process, more specifically, relates to a blast furnace slag and iron separation device, a slag and iron separation method and a blast furnace lower slag and iron recovery method. Background technique [0002] Hot metal and slag are the main products produced by blast furnaces. During the blast furnace tapping process, iron slag (ie, slag and molten iron) is simultaneously discharged from the taphole. The skimmer in front of the furnace is a device used to separate slag and iron. Whether it can work normally directly determines whether the production of the blast furnace can continue. During periods such as blast furnace start-up and recovery of special furnace conditions (blast furnace hot junction, etc.), due to the poor fluidity and poor separation effect of the slag-iron mixed liquid, the slag and molten iron are directly separated by a slag ...

AI Technical Summary

Problems solved by technology

However, the material of the slag storage container is generally iron. If the slag with a lot of iron flows into the slag storage container, it will easily cause the slag storage container to burn through, or even burn the slag storage container transportation path.

In addition, if the slag is processed by the water flushing slag process, due to its high iron content, it is easy to explode when exposed to water, which aggravates the safety hazard

If the unseparated slag and iron are directly treated as slag, it will increase the iron loss of the blast furnace and cause serious economic losses.

[0004] In addition, in the normal production process of the blast furnace, due to the smelting ore (such as vanadium-titanium ore smelting, poor separation effect of slag and iron) or raw material conditions (such as poor coke quality, high furnace temperature level control, high viscosity of slag and iron, the separation Poor effect) may result in poor short-term or long-term separation effect of slag and iron. The slag (i.e. lower slag) after passing through the skimmer still contains a large amount of molten iron. , will also cause economic losses and safety hazards

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