A sintering cup oxygen-enriched sintering test device

Abstract

The present invention discloses a sintering cup oxygen-enriched sintering test device, comprising a rotating shaft, an ignition hood, a gas fuel tank, a combustion-supporting blower, an oxygen hood, an oxygen tank, a sintering cup, a vacuum chamber and an exhaust fan. The rotating shaft is fixed in the up-and-down direction, and can rotate with the vertical direction as the axis; the ignition hood is fixed on the rotating shaft; the gas fuel tank conveys gas fuel to the ignition hood through a pipeline; the combustion-supporting blower blows air into the ignition hood through a pipeline; the oxygen hood is fixed on the rotating shaft, and has a first upper opening and a first lower opening; the oxygen tank conveys oxygen to the oxygen hood through a pipeline; the sintering cup has a second upper opening and a second lower opening, and the upper end height of the sintering cup is lower than the lower end height of the oxygen hood and the ignition hood; the vacuum chamber has a third upper opening, and the third upper opening is offset against the second lower opening of the sintering cup; the exhaust fan is connected to the vacuum chamber through a pipeline. Compared with the prior art, the oxygen hood and the ignition hood can be switched by rotating the rotating shaft in the present invention, and the operation is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of oxygen-enriched sintering test, in particular to a sintering cup oxygen-enriched sintering test device. Background Art

[0002] Oxygen-enriched sintering improves the combustion environment of the fuel during the sintering process by mixing oxygen into the air pumped into the material layer, which makes the fuel burn more fully and releases more heat, thereby reducing the use of solid fuel and reducing the amount of carbon monoxide produced. In addition, oxygen-enriched sintering is conducive to forming an oxidizing atmosphere in the sintering cup, which can reduce the generation of FeO and improve the strength and reducibility of the sintered ore.

[0003] In the existing oxygen-enriched sintering test equipment, the oxygen hood is conical or cylindrical, and is placed above the sintering cup or in the ignition hood by means of a bracket. The gas distribution method is radial gas distribution, which has problems such as uneven gas distribution, short gas mixing time, easy oxygen overflow and waste of energy, and inconvenient maintenance. In addition, the oxygen concentration is generally used to detect the oxygen concentration in the vacuum chamber, and it is impossible to detect the early oxygen enrichment effect. Summary of the invention

[0004] The purpose of the present invention is to provide a sintering cup oxygen enrichment test device to solve the problems existing in the above-mentioned prior art, improve the uniformity of oxygen distribution, enhance the mixing effect of oxygen and air, reduce the waste of oxygen resources, facilitate device maintenance, and better detect the early oxygen enrichment effect.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The invention discloses a sintering cup oxygen-enriched sintering test device, comprising:

[0007] A rotating shaft, which is fixed in the up-down direction and can rotate with the vertical direction as the axis;

[0008] An ignition cover, fixed on the rotating shaft;

[0009] A gas fuel tank, which delivers gas fuel to the ignition cover through a pipeline;

[0010] A combustion-supporting fan, blowing air into the ignition hood through a pipeline;

[0011] An oxygen mask, fixed on the rotating shaft, having a first upper opening and a first lower opening;

[0012] An oxygen tank, which delivers oxygen to the oxygen mask through a pipeline;

[0013] A sintering cup having a second upper opening and a second lower opening, wherein the upper end height of the sintering cup is lower than the lower end heights of the oxygen hood and the ignition hood;

[0014] A vacuum chamber having a third upper opening, wherein the third upper opening abuts against the second lower opening of the sintering cup;

[0015] The exhaust fan is connected with the vacuum chamber through a pipeline.

[0016] Preferably, the radial distances between the sintering cup, the ignition cover and the oxygen cover relative to the rotating shaft are equal.

[0017] Preferably, the pipeline between the gas fuel tank and the ignition cover includes a first stainless steel pipe and a first hose, and the first stainless steel pipe is provided with a first pressure reducing valve, a first flow meter, a first pressure gauge and a first valve.

[0018] Preferably, the pipeline between the combustion-supporting blower and the ignition cover includes a second stainless steel pipe and a second hose.

[0019] Preferably, the pipeline between the oxygen tank and the oxygen mask includes a third stainless steel pipe and a third hose, and the third stainless steel pipe is provided with a second pressure reducing valve, a second flow meter, a second pressure gauge and a second valve.

[0020] Preferably, a sealing strip is provided on the bottom end surface of the oxygen hood, and the sealing strip is used for sealing contact with the top end surface of the sintering cup.

[0021] Preferably, the ignition cover is fixedly connected to the rotating shaft via a first connecting rod, the oxygen cover is fixedly connected to the rotating shaft via a second connecting rod, and the angle between the first connecting rod and the second connecting rod is 75 degrees.

[0022] Preferably, the vacuum chamber is connected to a first oxygen analyzer, and the oxygen hood is connected to a second oxygen analyzer, and the first oxygen analyzer and the second oxygen analyzer are used to measure the oxygen concentration in the vacuum chamber and the oxygen hood respectively.

[0023] Preferably, the rotating shaft is an output shaft of a vertical gear reduction motor or is drivingly connected to an output shaft of a vertical gear reduction motor.

[0024] Preferably, the oxygen hood includes a conical side wall at an upper portion and a columnar side wall at a lower portion, and an air distribution structure is arranged in the oxygen hood, the air distribution structure includes four first-layer air distribution pipes, four second-layer air distribution pipes, a six-way pipe opening and a five-way pipe opening, the four first-layer air distribution pipes are distributed in a cross shape and are connected with the four pipe openings on the six-way pipe opening, the four second-layer air distribution pipes are distributed in a cross shape and are connected with the four pipe openings on the five-way pipe opening, the remaining pipe openings on the five-way pipe openings are connected with one remaining pipe opening on the six-way pipe openings, the other remaining pipe opening on the six-way pipe openings is connected with the oxygen tank through the pipeline, the first-layer air distribution pipes are located above the second-layer air distribution pipes, the relative rotation angle between the vertical projection of the first-layer air distribution pipes and the vertical projection of the second-layer air distribution pipes is 45 degrees, and air outlet holes are provided on the first-layer air distribution pipes and the second-layer air distribution pipes.

[0025] Compared with the prior art, the present invention has achieved the following technical effects:

[0026] The sintering cup oxygen-enriched sintering test device of the present invention separates the oxygen hood and the ignition hood and fixes them on the same rotating shaft, which is convenient for maintenance and operation; the test device can simultaneously detect the oxygen content before and after sintering, which is convenient for understanding the oxygen enrichment effect; by arranging a gas distribution structure in the oxygen hood, the mixing effect of oxygen and air is better and the gas distribution is more uniform, which can be used for oxygen-enriched sintering pilot test research. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of the sintering cup oxygen enrichment test device of the present invention;

[0029] Figure 2 A top view of the connection between the ignition cover, the oxygen cover and the rotating shaft;

[0030] Figure 3 This is a schematic diagram of the internal structure of an oxygen mask;

[0031] Explanation of the reference numerals: 1-ignition hood; 2-sintering cup; 3-vacuum chamber; 4-vertical gear reduction motor; 5-oxygen hood; 6-oxygen tank; 7-exhaust fan; 8-gas fuel tank; 9-combustion-supporting fan; 10-first pressure reducing valve; 11-first flow meter; 12-first pressure gauge; 13-first valve; 14-first oxygen analyzer; 15-second oxygen analyzer; 16-second pressure reducing valve; 17-second flow meter; 18-second pressure gauge; 19-second valve; 20-rotating shaft; 21-sealing strip; 22-first layer of gas distribution pipe; 23-second layer of gas distribution pipe; A-first stainless steel pipe; B-first hose; C-second stainless steel pipe; D-second hose; E-third stainless steel pipe; F-third hose. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The purpose of the present invention is to provide a sintering cup oxygen enrichment test device to solve the problems existing in the above-mentioned prior art, improve the uniformity of oxygen distribution, enhance the mixing effect of oxygen and air, reduce the waste of oxygen resources, facilitate device maintenance, and better detect the early oxygen enrichment effect.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1-3 As shown, this embodiment provides a sintering cup oxygen-enriched sintering test device, including a rotating shaft 20, an ignition cover 1, a gas fuel tank 8, a combustion-supporting fan 9, an oxygen cover 5, an oxygen tank 6, a sintering cup 2, a vacuum chamber 3 and an exhaust fan 7.

[0036] Among them, the rotating shaft 20 is fixed in the up and down directions and can rotate with the vertical direction as the axis; the ignition cover 1 is fixed on the rotating shaft 20; the gas fuel tank 8 transports gas fuel to the ignition cover 1 through a pipeline; the combustion-supporting fan 9 blows air into the ignition cover 1 through a pipeline; the oxygen cover 5 is fixed on the rotating shaft 20, and has a first upper opening and a first lower opening; the oxygen tank 6 transports oxygen to the oxygen cover 5 through a pipeline; the sintering cup 2 has a second upper opening and a second lower opening, and the upper end height of the sintering cup 2 is lower than the lower end height of the oxygen cover 5 and the ignition cover 1; the vacuum chamber 3 has a third upper opening, and the third upper opening is offset against the second lower opening of the sintering cup 2; the exhaust fan 7 is connected to the vacuum chamber 3 through a pipeline.

[0037] When in use, the ignition hood 1 and the oxygen hood 5 are staggered with the sintering cup 2, the sintering raw materials are placed in the sintering cup 2, and then the gas fuel is introduced into the ignition hood 1 and air is blown. After the ignition hood 1 reaches the set temperature, the rotating shaft 20 is rotated by a certain angle so that the ignition hood 1 is located above the sintering cup 2 to ignite the sintering raw materials in the sintering cup 2. Then, the rotating shaft 20 is rotated by a certain angle again so that the oxygen hood 5 is aligned with the sintering cup 2. The oxygen tank 6 introduces oxygen into the oxygen hood 5, and the exhaust fan 7 reduces the pressure in the vacuum chamber 3. The gas in the oxygen hood 5 flows through the sintering cup 2 for the combustion of the sintering raw materials in the sintering cup 2, and then continues to flow into the vacuum chamber 3, and is finally extracted from the vacuum chamber 3 by the exhaust fan 7. By fixing the oxygen hood 5 and the ignition hood 1 on the same transmission shaft, the oxygen hood 5 and the ignition hood 1 can be switched by rotating the rotating shaft 20, which is convenient to operate.

[0038] In order to ensure that the ignition cover 1 and the oxygen cover 5 can be aligned with the sintering cup 2 when they rotate to above the sintering cup 2, in this embodiment, the radial distances of the sintering cup 2, the ignition cover 1 and the oxygen cover 5 relative to the rotating shaft 20 are equal.

[0039] In order to facilitate the control of the gas fuel flowing out of the gas fuel tank 8, the pipeline between the gas fuel tank 8 and the ignition cover 1 of this embodiment includes a first stainless steel pipe A and a first hose B. The first stainless steel pipe A is provided with a first pressure reducing valve 10, a first flow meter 11, a first pressure gauge 12 and a first valve 13. The readings of the first flow meter 11 and the first pressure gauge 12 can enable the operator to conveniently observe the flow rate and pressure of the gas fuel, and operate the first pressure reducing valve 10 and the first valve 13 accordingly to make corresponding adjustments.

[0040] In this embodiment, the pipeline between the combustion-supporting fan 9 and the ignition cover 1 includes a second stainless steel pipe C and a second hose D.

[0041] In order to facilitate the control of the oxygen flowing out of the oxygen tank 6, the pipeline between the oxygen tank 6 and the oxygen mask 5 in this embodiment includes a third stainless steel pipe E and a third hose F, and the third stainless steel pipe E is provided with a second pressure reducing valve 16, a second flow meter 17, a second pressure gauge 18 and a second valve 19.

[0042] In this embodiment, the first hose B is wrapped by a high temperature resistant material, the second hose D is made of a high pressure resistant material, the third hose F is made of a high pressure resistant material. The high temperature resistant wrapping material uses asbestos, and the high pressure resistant hose uses a stainless steel bellows with an external threaded joint.

[0043] During the sintering test, in order to improve the utilization rate of oxygen, an annular sealing strip 21 is provided on the bottom end face of the oxygen hood 5 of this embodiment. The sealing strip 21 is used to seal and contact with the top end face of the sintering cup 2, thereby preventing oxygen from leaking from the gap between the sintering cup 2 and the oxygen hood 5.

[0044] There are many ways to connect the ignition cover 1 and the oxygen cover 5 to the rotating shaft 20. In this embodiment, the ignition cover 1 is fixedly connected to the rotating shaft 20 through a first connecting rod, and the oxygen cover 5 is fixedly connected to the rotating shaft 20 through a second connecting rod. The fixed connection method is preferably welding, and other methods such as bonding can also be used. The angle between the first connecting rod and the second connecting rod is preferably 75 degrees, which can also be adjusted as needed.

[0045] In order to simultaneously detect the oxygen content before and after sintering and facilitate understanding of the oxygen enrichment effect, the vacuum chamber 3 is connected to a first oxygen analyzer 14, and the oxygen hood 5 is connected to a second oxygen analyzer 15. The first oxygen analyzer 14 and the second oxygen analyzer 15 are used to measure the oxygen concentration in the vacuum chamber 3 and the oxygen hood 5 respectively.

[0046] The rotating shaft 20 can be rotated manually or driven by a driving structure. In this embodiment, the rotating shaft 20 is the output shaft of the vertical gear reduction motor 4 or is connected to the output shaft of the vertical gear reduction motor 4 by transmission, and the rotating shaft 20 is driven by the vertical gear reduction motor 4.

[0047] In order to achieve a better mixing effect of oxygen and air and to make the oxygen distribution more uniform, an air distribution structure is provided in the oxygen mask 5 of the present embodiment, and the air distribution structure includes four first-layer air distribution pipes 22, four second-layer air distribution pipes 23, a six-way pipe opening and a five-way pipe opening. The four first-layer air distribution pipes 22 are distributed in a cross shape and are connected to the four pipe openings on the six-way pipe opening, and the four second-layer air distribution pipes 23 are distributed in a cross shape and are connected to the four pipe openings on the five-way pipe opening. The remaining pipe opening on the five-way pipe opening is connected to the remaining one pipe opening on the six-way pipe opening, and the remaining other pipe opening on the six-way pipe opening is connected to the oxygen tank 6 through a pipeline. The first-layer air distribution pipe 22 is located above the second-layer air distribution pipe 23, and the relative rotation angle between the vertical projection of the first-layer air distribution pipe 22 and the vertical projection of the second-layer air distribution pipe 23 is 45 degrees. The first-layer air distribution pipe 22 and the second-layer air distribution pipe 23 are provided with air outlets. In this embodiment, three air outlet holes are provided on each of the first layer of air distribution pipes 22 and the second layer of air distribution pipes 23, and the air outlet holes are distributed at equal intervals.

[0048] The specific steps for using the above test device are as follows:

[0049] (1) Before starting work, the ignition cover 1 and the oxygen cover 5 are simultaneously located on one side of the sintering cup 2, the sintering raw materials are loaded into the sintering cup 2, the first pressure reducing valve 10 is opened, and the automatic operation program of the sintering cup 2 is started.

[0050] (2) When the ignition hood 1 reaches the set temperature, it starts to turn to the top of the sintering cup 2. After the ignition is completed, the ignition hood 1 turns back and closes the first pressure reducing valve 10. The oxygen hood 55 turns to the top of the sintering cup 2, and air enters from the top of the oxygen hood 5. At this time, the second pressure reducing valve 16 is opened and mixed with the oxygen discharged from the first layer of gas distribution pipes 22 and the second layer of gas distribution pipes 23, and is sucked into the sintering cup 2 by the exhaust fan 7 to achieve oxygen-enriched sintering.

[0051] (3) After sintering is completed, the oxygen hood 5 returns to its initial state.

[0052] (4) During the test, the oxygen flow rate can be controlled by the second valve 19, so that the influence of different oxygen enrichment levels on the sintering process and sintered ore can be studied.

[0053] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A sintering cup oxygen-enriched sintering test device, characterized in that: include: A rotating shaft, which is fixed in the up-down direction and can rotate with the vertical direction as the axis; An ignition cover, fixed on the rotating shaft; A gas fuel tank, which delivers gas fuel to the ignition cover through a pipeline; A combustion-supporting fan, blowing air into the ignition hood through a pipeline; An oxygen mask, fixed on the rotating shaft, having a first upper opening and a first lower opening; An oxygen tank, which delivers oxygen to the oxygen mask through a pipeline; A sintering cup having a second upper opening and a second lower opening, wherein the upper end height of the sintering cup is lower than the lower end heights of the oxygen hood and the ignition hood; A vacuum chamber having a third upper opening, wherein the third upper opening abuts against the second lower opening of the sintering cup; An exhaust fan connected to the vacuum chamber through a pipeline; The pipeline between the gas fuel tank and the ignition cover includes a first stainless steel pipe and a first hose, and the first stainless steel pipe is provided with a first pressure reducing valve, a first flow meter, a first pressure gauge and a first valve; The pipeline between the oxygen tank and the oxygen mask includes a third stainless steel pipe and a third hose, and the third stainless steel pipe is provided with a second pressure reducing valve, a second flow meter, a second pressure gauge and a second valve; The oxygen hood includes a conical side wall at an upper portion and a columnar side wall at a lower portion, an air distribution structure is arranged inside the oxygen hood, and the air distribution structure includes four first-layer air distribution pipes, four second-layer air distribution pipes, a six-way pipe opening and a five-way pipe opening, the four first-layer air distribution pipes are distributed in a cross shape and are connected with the four pipe openings on the six-way pipe opening, the four second-layer air distribution pipes are distributed in a cross shape and are connected with the four pipe openings on the five-way pipe opening, the remaining pipe openings on the five-way pipe openings are connected with one remaining pipe opening on the six-way pipe openings, and the other remaining pipe opening on the six-way pipe openings is connected with the oxygen tank through the pipeline, the first-layer air distribution pipes are located above the second-layer air distribution pipes, the relative rotation angle between the vertical projection of the first-layer air distribution pipes and the vertical projection of the second-layer air distribution pipes is 45 degrees, and air outlet holes are arranged on the first-layer air distribution pipes and the second-layer air distribution pipes.

2. The sintering cup oxygen-enriched sintering test device according to claim 1, characterized in that: The radial distances between the sintering cup, the ignition cover and the oxygen cover relative to the rotating shaft are equal.

3. The sintering cup oxygen-enriched sintering test device according to claim 1, characterized in that: The pipeline between the combustion-supporting blower and the ignition cover includes a second stainless steel pipe and a second hose.

4. The sintering cup oxygen-enriched sintering test device according to claim 1, characterized in that: A sealing strip is arranged on the bottom end surface of the oxygen hood, and the sealing strip is used for sealing contact with the top end surface of the sintering cup.

5. The sintering cup oxygen-enriched sintering test device according to claim 1, characterized in that: The ignition cover is fixedly connected to the rotating shaft via a first connecting rod, and the oxygen cover is fixedly connected to the rotating shaft via a second connecting rod. The included angle between the first connecting rod and the second connecting rod is 75 degrees.

6. The sintering cup oxygen-enriched sintering test device according to claim 1, characterized in that: The vacuum chamber is connected to a first oxygen analyzer, and the oxygen hood is connected to a second oxygen analyzer. The first oxygen analyzer and the second oxygen analyzer are used to measure the oxygen concentration in the vacuum chamber and the oxygen hood respectively.

7. The sintering cup oxygen-enriched sintering test device according to claim 1, characterized in that: The rotating shaft is the output shaft of the vertical gear reduction motor or is drivingly connected to the output shaft of the vertical gear reduction motor.

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