Forced cooling molten iron main groove and production method thereof

Abstract

The invention belongs to blast furnace equipment, and particularly relates to a forced cooling molten iron main groove and a production method thereof. The main groove comprises a steel housing, a refractory working layer, a side wall refractory pouring layer, a bottom refractory layer, a metal pipe and a supporting frame; the side wall refractory pouring layer which is located between the steel housing and the refractory working layer is provided with a metal pipe of which the two ends extend out of the steel housing, the metal pipe is U-shaped or serpentine, and a cooling medium enters fromone end of the metal pipe and discharged from the other end. When the molten iron main groove is produced, the metal pipe is installed on the supporting frame, the two ends penetrate to reach the exterior of the steel housing, a sealing plate or a sealing hood is welded, the template which is used for the pouring of the side wall refractory pouring layer, refractory castables are filled, and proper vibration is conducted; the template is removed after the castables are cured to produce a side wall refractory pouring layer with an embedded steel pipe. The molten iron main groove has the advantages that the molten iron main groove refractory working layer can be well cooled to reduce the temperature and the corrosion rate of the refractory working layer, improve the iron influx of the molteniron main groove and reduce the refractory consuming amount.

Description

technical field [0001] The invention belongs to front equipment for ironmaking blast furnaces, and in particular relates to a forced-cooled molten iron main ditch and a manufacturing method thereof. Background technique [0002] At present, there are two ways of forced air cooling and natural air cooling for the main ditch of blast furnace molten iron. The main molten iron channel of the forced air cooling method is to make the steel shell of the molten iron main channel into a "shell", and blow air into the "shell" to achieve cooling, so as to reduce the temperature of the steel shell. Since the cooling medium in this way is far away from the refractory working layer of the molten iron main ditch, and there are also low thermal conductivity safety layers, heat-insulating refractory bricks, etc. between the steel shell and the refractory working layer, the refractory material of the molten iron main ditch The working layers are hardly cooled. As we all know, the main reaso...

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Problems solved by technology

The natural air-cooling method of the molten iron main ditch relies on the natural flow of air on the surface of the steel shell to reduce the temperature of the steel shell. Since the heat transfer coefficient between the natural flow air and the steel shell is much lower than that of the forced air flow, this method has a great impact on the main flow of molten iron. The cooling effect of the trench refractory working layer is obviously worse than the forced air cooling method, and there are more obvious technical defects than the forced air cooling type molten iron main channel

[0003] It can be seen that the current two methods of molten iron main channel have technical defects such as poor cooling effect of the refractory working layer, high erosion and wear rate of the refractory working layer, low iron content in the main channel of molten iron, and large consumption of refractory materials

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