Liquid iron treatment method and device

Abstract

[Problem] To make it possible to perform desulfurization of molten pig iron efficiently and in a short time. [Solution] A molten pig iron processing method comprising: steps for scraping out pre-processing slag from a molten pig iron ladle 9 into a slag chute 4 and for scraping out post-processing slag from a recycling pit 6 into a recycling chute 7; a step for moving the slag chute 4 near a pre-processing slag pit 5 and the recycling chute 7 near the molten pig iron ladle 9; steps for discarding the pre-processing slag from the slag chute 4 into the pre-processing slag pit 5 and for depositing the post-processing slag from the recycling chute 7 into the molten pig iron ladle 9; a step for desulfurization of the molten pig iron in the molten pig iron ladle 9; a step for moving the slag chute 4 near the molten pig iron ladle 9 and the recycling chute 7 near the recycling pit 6 during the desulfurization step; a step for scraping out the post-processing slag from the molten pig iron ladle 9 into the slag chute 4; and a step for depositing the post-processing slag from the slag chute 4 into the recycling pit 6.

Description

technical field [0001] The present invention relates to a molten iron treatment method and a molten iron treatment device, in particular to the following technologies: before the desulfurization treatment, the pre-processed slag is removed from the molten iron tank and then the treated slag is put into the molten iron tank; Scrape out the treated slag from the liquid tank. Background technique [0002] Conventionally, when desulfurization is performed by adding a desulfurizing agent to a molten iron tank, a technique has been developed so that the treatment of molten iron can be efficiently performed by devising a treatment cycle. [0003] For example, Patent Document 1 (Japanese Patent No. 4728716, particularly refer to paragraphs 0018 to 0034, figure 1 And Fig. 4) described molten iron processing is equipped with trolley 4,5 and iron molten tank 14,15 etc., wherein, will use the desulfurization treatment of trolley 4 and iron molten tank 14 etc. to carry out by following ...

AI Technical Summary

Problems solved by technology

[0018] However, in the molten iron treatment described in Patent Document 1, the scraped-out treated slag is not reused, but the trolleys 4, 5 and the crane 6 are used to move the molten iron tanks 14, 15 and carry out scraping of the slag, etc. , so there are the following problems: the slag after processing has been wasted, and the time-consuming process of removing the slag

[0019] In addition, in the molten iron treatment described in Patent Document 2, although the desulfurization slag is reused, the slag recovery pot 3 and the molten iron tank 4 are moved using a transport mechanism 5 such as a truck or a crane, and a forklift 6 to remove the slag. out and in, so there is a problem that it takes time to do these processes

[0020] Furthermore, in the treatment of molten iron described in Patent Documents 1 and 2, no effort has been made to design for the efficient implementation of the process of scraping out the pre-treated slag from the molten iron from the blast furnace and discarding it.

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