Device for activating blast furnace hearth

Abstract

The utility model provides a device for activating a blast furnace hearth, and relates to the technical field of blast furnace equipment. The device for activating the blast furnace hearth comprises an outer pipe, an inner pipe and a ventilation assembly, the inner pipe is used for communicating with a hearth; the outer pipe is used for being communicated with the hearth and arranged on the inner pipe in a sleeving mode. The ventilation assembly comprises a first pipeline, a second pipeline and a third pipeline; the first pipeline communicates with the outer pipe, the third pipeline communicates with the inner pipe, one end of the second pipeline is connected with the first pipeline, and the other end of the second pipeline is connected with the third pipeline. The first pipeline is provided with a first air valve and a second air valve, and the first air valve and the second air valve are located on the two sides of one end of the third pipeline respectively; the third pipeline is provided with a first oxygen valve and a second oxygen valve; the second pipeline is provided with a ventilation valve. The device for activating the hearth of the blast furnace solves the technical problems that in existing blast furnace equipment, the oxygen content of a ventilation steel pipe is low, the activating effect on the hearth is not obvious, and the cost of refractory materials is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of blast furnace equipment, especially to a device for activating blast furnace hearth. BACKGROUND

[0002] The blast furnace equipment is used for generating carbon monoxide by the reaction of coke and oxygen in the air at high temperature, and the carbon monoxide is used as a reducing agent to remove oxygen in iron ore during the ascending process in the furnace, so as to obtain iron by reduction.

[0003] The activation degree of the hearth when the blast furnace is started determines the quality of starting, especially for the blast furnace without residual iron, the hearth activation is difficult to guarantee. The existing hearth is wrapped with refractory material between the two layers of steel pipes to prevent the melting loss of the steel pipe when the air is ventilated. The compressed air and oxygen are simultaneously introduced into the hearth through the inner pipe, and the reaction of coke and oxygen is less, so the activation effect on the hearth is not obvious.

[0004] The present inventor has at least found the following problems in the process of implementing the embodiment:

[0005] The existing blast furnace equipment has low oxygen content of the air pipe, and the activation effect on the hearth is not obvious, and the cost of refractory material is high. INVENTION CONTENTS

[0006] The utility model discloses a device for activating blast furnace hearth, which solves the technical problems of the existing blast furnace equipment, low oxygen content of the air pipe, not obvious activation effect on the hearth, and high cost of refractory material.

[0007] INVENTION SCHEME

[0008] The utility model provides a device for activating blast furnace hearth, including outer pipe, inner pipe and ventilation component, the inner pipe is used for communicating with hearth, the outer pipe is used for communicating with hearth, and it is set in the inner pipe, the ventilation component includes first pipeline, second pipeline and third pipeline, the first pipeline communicates with the outer pipe, the third pipeline communicates with the inner pipe, one end of the second pipeline is connected with the first pipeline, and its other end is connected with the third pipeline, the first pipeline is equipped with first air valve and second air valve, and the first air valve and the second air valve are located at both sides of one end of the third pipeline respectively, the third pipeline is equipped with first oxygen valve and second oxygen valve, and the first oxygen valve and the second oxygen valve are located at both sides of the other end of the third pipeline respectively, the second pipeline is equipped with ventilation valve.

[0009] Further, the first pipeline is connected with a first pressure gauge, and the third pipeline is connected with a second pressure gauge.

[0010] Further, the outer pipe is connected with a mud package.

[0011] Further, the outer tube is connected with the iron mouth combination brick, and the iron mouth combination brick is located at one side of the mud bag.

[0012] Further, the outer tube is connected with the mud sleeve, and the mud sleeve is located at one side of the iron mouth combination brick.

[0013] Beneficial effects:

[0014] The utility model provides a device of active blast furnace hearth, when using, open first air valve, second air valve, first oxygen valve and air valve close second oxygen valve before blast furnace slagging, pass into 0.5 megapascal compressed air to first pipeline, guarantee that the inner tube and outer tube are full of compressed air, after blast furnace slagging, close air valve, open second oxygen valve, pass into 0.7 megapascal oxygen to third pipeline, and oxygen enters the hearth through the inner tube, pass into 0.7 megapascal compressed air to first pipeline, and compressed air enters the hearth through the outer tube. The device of active blast furnace hearth can make the oxygen content in the hearth higher, the active effect of the hearth is higher, and refractory material is not consumed, so the cost is lower. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0016] Figure 1 It is a simplified schematic diagram of the device of active blast furnace hearth provided in the embodiment.

[0017] Icon:

[0018] 100-outer tube;110-mud bag;120-iron mouth combination brick;130-mud sleeve;

[0019] 200-inner tube;

[0020] 300-air assembly;310-first pipeline;311-first air valve;312-second air valve;313-first pressure gauge;320-second pipeline;321-air valve;330-third pipeline;331-first oxygen valve;332-second oxygen valve;333-second pressure gauge. SPECIFIC EMBODIMENT

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of the present application.

[0023] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical", etc. do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0026] Some embodiments of the present application will be described in detail below with reference to the drawings. In the case of no conflict, the following examples and features in the examples can be combined with each other.

[0027] The present embodiment provides a device for activating blast furnace hearth, please refer to Figure 1 As shown in the figure, comprising outer tube 100, inner tube 200 and ventilation assembly 300; inner tube 200 is used for communicating with the hearth; outer tube 100 is used for communicating with the hearth, and it is sleeved on the inner tube 200; ventilation assembly 300 includes first pipeline 310, second pipeline 320 and third pipeline 330; first pipeline 310 is communicated with outer tube 100, third pipeline 330 is communicated with inner tube 200, one end of second pipeline 320 is connected with first pipeline 310, and the other end is connected with third pipeline 330; first pipeline 310 is provided with first air valve 311 and second air valve 312, first air valve 311 and second air valve 312 are respectively located on both sides of one end of third pipeline 330; third pipeline 330 is provided with first oxygen valve 331 and second oxygen valve 332, first oxygen valve 331 and second oxygen valve 332 are respectively located on both sides of the other end of third pipeline 330; second pipeline 320 is provided with ventilation valve 321.

[0028] Specifically, the diameter of outer tube 100 is 55mm, and the diameter of inner steel tube is 20mm. It is inserted into the hearth, and 1.5m is left outside the furnace. The setting of outer tube 100 and inner tube 200 is used for simultaneously introducing oxygen or compressed air into the hearth. Ventilation assembly 300 is used for controlling the introduction of oxygen or air or the simultaneous introduction of air and oxygen into the hearth. First pipeline 310 is connected with compressed air source, third pipeline 330 is connected with oxygen source, third pipeline 330 and ventilation valve 321 are used for controlling whether first pipeline 310 and second pipeline 320 are communicated, first air valve 311 and second air valve 312 are used for controlling the flow direction of compressed air, first oxygen valve 331 and second oxygen valve 332 are used for controlling the flow direction of oxygen. In use, before slagging of blast furnace, first air valve 311, second air valve 312, first oxygen valve 331 and ventilation valve 321 are opened, second oxygen valve 332 is closed, 0.5MPa of compressed air is introduced into first pipeline 310, it is ensured that inner tube 200 and outer tube 100 are filled with compressed air, and inner tube 200 and outer tube 100 are protected from being molten; after slagging of blast furnace, ventilation valve 321 is closed, second oxygen valve 332 is opened, 0.7MPa of oxygen is introduced into third pipeline 330, the oxygen enters the hearth through inner tube 200, 0.7MPa of compressed air is introduced into first pipeline 310, and the compressed air enters the hearth through outer tube 100.

[0029] In the present embodiment, first pipeline 310 is connected with first pressure gauge 313, and third pipeline 330 is connected with second pressure gauge 333.

[0030] Specifically, the first pressure gauge 313 is used for displaying the pressure value of the first pipeline 310, so as to facilitate the operator to control the compressed air pressure entering the first pipeline 310; the second pressure gauge 333 is used for displaying the pressure value of the third pipeline 330, so as to facilitate the operator to control the oxygen pressure entering the third pipeline 330.

[0031] In the embodiment, the outer pipe 100 is connected with the mud bag 110.

[0032] Specifically, the thickness of the mud bag 110 is about 600 mm, which is used for avoiding that the outer pipe 100 is subjected to too high temperature, and meanwhile, the outer pipe 100 does not need to be coated with refractory material, thereby saving cost. The thermocouple is installed in the pipe at a position 10 cm away from the mud bag 110, which is used for detecting the melting loss degree of the equipment.

[0033] In the embodiment, the outer pipe 100 is connected with the iron mouth combined brick 120, and the iron mouth combined brick 120 is located at one side of the mud bag 110.

[0034] Specifically, the iron mouth combined brick 120 is used for providing support for the outer pipe 100.

[0035] In the embodiment, the outer pipe 100 is connected with the mud sleeve 130, and the mud sleeve 130 is located at one side of the iron mouth combined brick 120.

[0036] Specifically, the mud sleeve 130 is used for sealing the gap at the connection position between the outer pipe 100 and the furnace.

[0037] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for activating a blast furnace hearth, characterized in that, It includes an outer tube (100), an inner tube (200), and a ventilation assembly (300); The inner tube (200) is used to communicate with the furnace hearth; The outer tube (100) is used to communicate with the furnace hearth and is sleeved on the inner tube (200); The ventilation assembly (300) includes a first conduit (310), a second conduit (320), and a third conduit (330); The first pipe (310) is connected to the outer pipe (100), the third pipe (330) is connected to the inner pipe (200), and one end of the second pipe (320) is connected to the first pipe (310), and the other end is connected to the third pipe (330). The first pipe (310) is provided with a first air valve (311) and a second air valve (312), and the first air valve (311) and the second air valve (312) are respectively located on both sides of one end of the third pipe (330); The third pipeline (330) is equipped with a first oxygen valve (331) and a second oxygen valve (332), with the first oxygen valve (331) and the second oxygen valve (332) located on both sides of the other end of the third pipeline (330); The second pipe (320) is equipped with a vent valve (321).

2. The apparatus for activating a blast furnace hearth according to claim 1, characterized in that, The first pipe (310) is connected to a first pressure gauge (313), and the third pipe (330) is connected to a second pressure gauge (333).

3. The apparatus for activating a blast furnace hearth according to claim 2, characterized in that, The outer tube (100) is connected to a mud bag (110).

4. The apparatus for activating a blast furnace hearth according to claim 3, characterized in that, The outer tube (100) is connected to an iron-tipped composite brick (120), which is located on one side of the mud bag (110).

5. The apparatus for activating a blast furnace hearth according to claim 4, characterized in that, The outer tube (100) is connected to a mud sleeve (130), which is located on one side of the iron-tip composite brick (120).

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