Schreyerite furnace protection method and device

Abstract

The invention discloses a schreyerite furnace protection method and a device. According to the method and the device, a stocker containing schreyerite powder, which is disposed in a mobile vehicle, is pressurized by utilization of nitrogen so as to guarantee that the stocker is slightly pressurized, a feeder is opened, the concrete schreyerite powder is injected into a blast furnace by utilization of nitrogen through a tuyere, and the stocker is subjected to on-line real-time weighing control during injection. The stocker, a nitrogen bottle, the feeder and other auxiliary devices are installed on the mobile vehicle, the injection tuyere position is adjusted by moving the mobile vehicle, a discharging valve at the bottom of the stocker is connected to the feeder, and the lower part of the stocker is provided with a nozzle. The method and the device can inject the schreyerite to a specific area, movement is convenient and operation is simple. The method and the device achieve an effect of on-line furnace protection and prolong the service lifetime of the blast furnace. By setting the pressure of the schreyerite in the stocker and the pressure in the nitrogen bottle, the schreyerite injection amount is controlled quantitatively, and accurate control of blast furnace schreyerite-injection furnace protection can be achieved.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and in particular relates to a method and device for online repair and maintenance of a hearth and furnace bottom lining below a tuyere in an ironmaking blast furnace. Background technique [0002] High utilization factor is one of the main economic and technical indicators pursued by the blast furnace. However, with the increase of the smelting intensity of the blast furnace, the heat load borne by the blast furnace also increases. , Mechanical scour, and thermal stress fall off, resulting in abnormal thermal stress in the stave working environment and abnormal erosion at the junction of the furnace bottom and the hearth, which have become the main factors affecting the life of the blast furnace. In order to prolong the life of blast furnaces, most blast furnaces use titanium-containing materials to protect the furnace. The timing of adding titanium-containing materials mainly ...

AI Technical Summary

Problems solved by technology

[0006] This method cannot repair the inner lining of the furnace hearth and furnace bottom, and cannot effectively solve the influence of the internal thermal stress of the furnace hearth on the stave

[0007] These methods are all to add vanadium-titanium protection charge to the furnace, the difference is that the way and method of feeding are different, and these ways and methods all have deficiencies to a certain extent, so it is urgent to develop a new method to solve this problem. On-line maintenance without affecting the normal production of the blast furnace to prolong the service life of the blast furnace

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