A kind of iron storage type tapping main ditch

Abstract

The invention discloses an iron storing type main tapping channel. The iron storing type main tapping channel comprises a bearing body, an iron running channel and a wearing block, wherein the bearing body comprises a heat resisting layer, a heat insulation layer and a bearing layer; the heat resisting layer is connected to the upper surface of the heat insulation layer, and the heat insulation layer is connected to the upper surface of the bearing layer; the iron running channel is arranged in the upper part of the bearing body, and the bottom surface of the iron running channel comprises three parts, namely, a first horizontal surface, a slope surface and a second horizontal surface, wherein the first horizontal surface is a rectangular surface; the slope surface is a trapezoidal surface. According to the iron storing type main tapping channel, the opening angle is reduced, and the channel wall is thick, so that the iron channel is not liable to be flushed and damaged by molten iron; the wearing block is arranged at a position to be subjected to the swiftest molten iron; in addition, the wearing block can be conveniently replaced, so that the effect of sacrificing the knights in order to save the queen (in chess) can be achieved, namely, the wearing block can be replaced to protect the tapping channel; silicon nitride is fed into each layer of the bearing block based on proper proportion in order to replace some of silicon carbide, so that the iron storing type main tapping channel is high in resistance to high temperature as well as resistance to slag corrosion.

Description

【Technical field】 [0001] The invention relates to the technical field of metal smelting, in particular to the technical field of an iron storage type tapping main ditch. 【Background technique】 [0002] The blast furnace tap trough is a channel to guide the high-temperature molten iron and slag and fully separate them. The life of the refractory materials used in it directly affects the normal production of the blast furnace. The anti-slag erosion performance is poor, and the water required for mixing is large during pouring and molding. The increase in the amount of water will increase the fluidity of the castable and reduce the compactness of the castable, so that the normal temperature and temperature of the castable The high-temperature strength is reduced; in addition to the refractory materials used to affect the service life of the tap trough, the structure of the tap trough is also an important reason for affecting its service life. The existing tapping channel struc...

AI Technical Summary

Problems solved by technology

[0002] The blast furnace tap trough is a channel to guide the high-temperature molten iron and slag and fully separate them. The life of the refractory materials used in it directly affects the normal production of the blast furnace. The anti-slag erosion performance is poor, and the water required for mixing is large during pouring and molding. The increase in the amount of water will increase the fluidity of the castable and reduce the compactness of the castable, so that the normal temperature and temperature of the castable The high-temperature strength is reduced; in addition to the refractory materials used to affect the life of the tap trough, the structure of the tap trough is also an important reason for affecting its service life

The existing tapping channel structure design is too simple and partially unreasonable. The angle of the tapping channel is too large at the opening, which makes the channel wall too thin. Manual repairs are often required during use, which not only wastes manpower but also affects the amount of tapping.

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