Iron tap channel swing spout prefabricated piece and manufacturing method thereof

Abstract

The invention discloses an iron tap channel swing spout prefabricated piece. The iron tap channel swing spout prefabricated piece comprises different particulate finesses of dense corundum, different particulate finesses of tabular corundum, silicon carbide, tabular corundum powder, silicon carbide powder, active alumina powder, graphite powder, ferro-silicon nitride, asphalt powder, boron carbide, borosilicate glass powder, calcium aluminate cement, silicon powder, anti-explosion fiber and sodium hexametaphosphate. A production method of the iron tap channel swing spout prefabricated piece comprises the steps that the various raw materials are mixed, water is added, the mixture is stirred and then poured into a mold for pouring forming, demolding is conducted after forming, and then maintenance is conducted; the maintained product is placed in a firing furnace, the temperature is raised and then kept, the temperature is then lowered at a constant speed and then kept; the temperature is raised at the temperature rising speed, and then the temperature is kept; and natural cooling is conducted. The iron tap channel swing spout prefabricated piece and the production method of the iron tap channel swing spout prefabricated piece have the advantages that the prepared iron tap channel swing spout prefabricated piece has good anti-scouring performance, high-temperature strength and oxidation resistance and can keep high iron flux, and the iron tap channel swing spout prefabricated piece has the important functions on shortening the length of an iron tap channel, reducing the area of a cast house, improving the flushing and casting conditions, reducing the maintenance expense of the iron tap channel and reducing the energy consumption of per ton of iron.

Description

technical field [0001] The invention relates to a prefabricated part of a swing nozzle of a tapping channel and a preparation method thereof. Background technique [0002] The swing nozzle is an important channel for the molten iron to enter the torpedo tank from the iron trough, and at the same time it can desiliconize the molten iron. Therefore, it plays a very important role in improving the quality of the molten iron and the service life of the iron trough in front of the furnace. At present, the swing nozzle of large blast furnace generally uses Al 2 o 3 -SiC-C castables are used as prefabricated parts, and most of the key technologies such as raw materials and proportions used to prepare the swing chute are the same as those of iron trough castables. When the swing nozzle is used at high temperature, its slag resistance and molten iron erosion resistance are significantly reduced. The main damage methods of the swing nozzle are: (1) Impact corrosion of molten iron: ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a prefabricated part of the swinging nozzle of the tapping channel and its preparation method, which can effectively solve the problems that the C component of the existing prefabricated part of the swinging nozzle of the tapping channel is easily oxidized, resulting in loose material structure and reduced strength