Single-iron notch blast furnace iron storage type tapping main channel

Abstract

The invention discloses a pouring material and a single-iron notch blast furnace iron storage type tapping main channel using the same; the single-iron notch blast furnace iron storage type tapping main channel comprises a steel mould, a brick layer and the pouring material, wherein the brick layer is laid at the inner side of the steel mould; and the pouring material is poured at the inner side of the brick layer. The single-iron notch blast furnace iron storage type tapping main channel is characterized in that a channel is arranged at the inner side of the pouring material, so that the width of the channel is gradually increased from front to back. According to the invention, the scouring force of molten iron for the main channel can be reduced, the labor intensity of workers pushing slag can be reduced, and the front half part and rear half part of the main channel can be repaired synchronously, so that the waste can be avoided. The repairing material can be saved by about 40-50 tons every year, so that the cost is greatly saved; and about 10 ton of material can be saved for a new main channel which is poured for the first time after the structural design is improved, so that the material cost is greatly saved, the annual total cost is greatly saved, and the economic benefit is greatly improved.

Description

【Technical field】 [0001] The invention relates to the field of refractory materials for blast furnace ironmaking, in particular to the improvement of the structure and formula of a single-taphole blast furnace iron storage type tapping main ditch castable. 【Background technique】 [0002] At present, more than half of my country's steel production still comes from 1000m 3 The following blast furnaces, quite a few of which are single-taphole blast furnaces, have relatively limited application of the tapping troughs of this type of blast furnaces in terms of mature and advanced integral pouring materials and repair techniques for multi-taphole blast furnaces because there is no spare main ditch. This puts forward higher requirements on the performance of the castable of the tapping main channel. [0003] At present, the integral pouring construction technology mainly adopted in the main ditch of the single-tap furnace iron storage type is: first place a pre-fabricated steel mo...

AI Technical Summary

Problems solved by technology

A certain amount of molten iron is stored in the main ditch. When tapping, the molten iron falls and impacts at the iron drop point to form a gyration, making this part the main part of the main ditch wear. When repairing is required, the iron drop point of the main ditch is often worn more large, but the second half of the main ditch wears very little, and the working layer that can be used in the second half can only be broken, and then the main ditch is repaired as a whole. The consumption of refractory materials has more than doubled, and the falling iron point The accumulation of iron slag is serious, and workers often need to push the slag, which greatly increases the labor intensity. In the later period of use, due to the wear and tear of the main groove, there are potential safety hazards for workers when working

When the design and manufacture are finished baking, the castable starts to exhaust and drain. Since the gas and moisture can only be discharged through the very few micropores of the castable, the temperature can only be raised slowly. If the baking is not done properly, the temperature will be raised quickly, and the gas and moisture will not be discharged in time. , can easily cause the main groove to burst

When the main ditch is repaired at high temperature, the castable will exhaust and drain quickly when it encounters high temperature. If the castable does not have time to discharge the gas and moisture in time, it is also prone to cracks or even burst. The completion of the repair work on time caused the blast furnace to be late in tapping, which adversely affected the normal production of the blast furnace. At the same time, the cracks in the main groove also caused safety hazards

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