A new type of prefabricated iron ditch and its preparation method

Abstract

The invention discloses a new type of prefabricated iron trough, which comprises an outer steel shell, a permanent layer and a working layer arranged in the outer steel shell, the permanent layer includes a permanent pouring layer, a prefabricated base and a prefabricated side plate, and the working layer is arranged on the permanent pouring layer, In the space enclosed by the prefabricated base and the prefabricated side panels, the prefabricated side panels and the prefabricated base are plugged and fixed, the lower end of the prefabricated side panels is provided with arc-shaped protrusions, and the prefabricated base is provided with matching arc-shaped protrusions. Arc groove. The invention also discloses a method for preparing a novel prefabricated iron trough. The process of the invention is simple, and the prepared novel prefabricated iron trough can effectively block the molten material passing through the working layer, greatly reducing safety risks, and the replacement is convenient and time-consuming. During the process, the normal switching and use of the tap trough will not be affected at all.

Description

technical field [0001] The invention belongs to the technical field of ironmaking, and in particular relates to a novel prefabricated iron trough and a preparation method thereof. Background technique [0002] At present, domestic large blast furnaces all adopt the iron storage type main tapping channel (hereinafter referred to as the main tapping channel). The role of slag. In actual production, the main reasons for the damage of the main ditch are: (1) severe erosion and erosion of flowing high-temperature molten iron and slag; (2) chemical erosion of liquid slag iron in blast furnace; (3) thermal shock damage of intermittent tapping. Among them, the erosion of high temperature molten iron and slag is the most important factor for the damage of the main trench. In actual production, the wall of the main ditch will gradually melt and become thinner with the increase of the amount of iron passing and the use time. When the thinnest part is less than the specified value, th...

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Problems solved by technology

However, the above problems have not been completely solved:

[0005] (1) After the bottom of the prefabricated side plate is embedded in the installation groove, the structure of the installation groove is an inverted trapezoid and the gap between the top of the prefabricated side plate and the steel shell is small, so it is difficult to replace;

[0006] (2) Since the top of the prefabricated veneer is designed as a "Z"-shaped structure, it is impossible to replace a certain part of the prefabricated side panel during the process of disassembly or replacement. All prefabricated veneers need to be disassembled and replaced, which increases the difficulty of construction and time;

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