A device for measuring the porosity of blast furnace burden

Abstract

The utility model discloses a kind of blast furnace material void fraction measuring devices, it is related to ironmaking technical field in steel industry, including gas source tank and furnace burden tank body, the top of furnace burden tank body is provided with tank body cover, the middle part of tank body cover is provided with air inlet pipe, the top of air inlet pipe is connected with first connecting pipe, first connecting pipe one end is connected with pressure valve, the other end of first connecting pipe is connected with pressure relief valve, the one end of pressure relief valve is connected with booster mechanism, booster mechanism includes the second connecting pipe connected in the one end of pressure valve, the one end of second connecting pipe is connected to the air outlet end of booster pump, the air outlet end of booster pump is connected with the air outlet end of gas source tank, tank body cover is installed with magnetic suspension ball liquid level meter.In the utility model, realize the void fraction detection after the mixing of various furnace burden of blast furnace, can simulate the real void fraction under the extrusion compression state of furnace burden under high pressure condition inside blast furnace, and then the particle size control of furnace burden, production and the mixing collocation scheme of various furnace burden are optimized.

Description

Technical Field

[0001] This utility model relates to the field of ironmaking technology in the steel industry, and in particular to a device for measuring the porosity of blast furnace materials. Background Technology

[0002] Porosity refers to the ratio of the volume of voids between particles to the total volume of the particle material layer. Mathematically, due to the varying sizes and packing methods of particles, it is difficult to provide a relatively accurate qualitative description. In practical industrial applications, porosity is influenced by a combination of factors (such as airflow velocity, wall effect, particle size, and particle packing method), resulting in different distribution patterns. Therefore, the study of porosity in packed beds is a very important task. Currently, research on porosity detection in packed beds can be broadly divided into two categories: photoelectric measurement and image analysis detection.

[0003] In recent years, with the advancements in nuclear magnetic resonance (NMR) technology, NMR imaging technology, high-speed imaging technology, capacitance tomography (CT) technology, computational algorithms, and computer processing and image processing technologies, the methods for detecting porosity have become increasingly diverse and more reliable and accurate than previous methods. However, due to the difficulty, cost, and equipment costs involved in detection, porosity detection of blast furnace burdens has not been widely applied to routine monitoring and tracking. A major challenge is finding a simple and convenient way to detect the porosity of blast furnace burdens, and to simulate, to some extent, the porosity under high-pressure conditions and compression. Solving this problem will provide crucial guidance for the production and blending of blast furnace burdens.

[0004] Therefore, a device for measuring the porosity of blast furnace materials is provided. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a blast furnace material porosity measuring device, which enables the detection of porosity after mixing various blast furnace materials. It can simulate the real porosity of the materials under high pressure conditions inside the blast furnace, and thus optimize the particle size control, production, and mixing scheme of various materials, overcoming the deficiencies of existing technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A blast furnace material porosity measuring device includes a gas source tank and a furnace charge tank. The top of the furnace charge tank is provided with a tank cover, and the middle of the tank cover is provided with an air inlet pipe. The top of the air inlet pipe is connected to a first connecting pipe. One end of the first connecting pipe is connected to a pressure valve, and the other end of the first connecting pipe is connected to a pressure relief valve. One end of the pressure relief valve is connected to a pressurization mechanism.

[0008] As a further embodiment of this utility model: the pressurizing mechanism includes a second connecting pipe connected to one end of the pressurizing valve, one end of the second connecting pipe being connected to the air outlet of the pressurizing pump, and the air extraction end of the pressurizing pump being connected to the air outlet of the air source tank.

[0009] As a further improvement of this utility model, a magnetic float level gauge is installed on the tank cover.

[0010] As a further improvement of this utility model: the inner wall of the furnace charge tank is provided with a volume scale line, and the inner wall of the furnace charge tank and above the volume scale line is provided with a hydraulic oil scale line.

[0011] As a further embodiment of this utility model: the air inlet pipe is installed in the middle of the tank cover via a swivel joint, and the bottom end of the air inlet pipe extends to the upper part of the inside of the tank cover.

[0012] As a further improvement of this utility model, an electronic scale is provided at the bottom of the furnace charge tank.

[0013] As a further improvement of this utility model, a pressure gauge is installed on the first connecting pipe.

[0014] The beneficial effects of this utility model are as follows:

[0015] The ability to detect the porosity of mixed blast furnace materials can simulate the actual porosity of the materials under high pressure and compression conditions inside the blast furnace, thereby optimizing the particle size control, production, and mixing schemes of various materials. Attached Figure Description

[0016] Figure 1 This is a first-view three-dimensional structural diagram of a blast furnace material porosity measuring device proposed in this utility model.

[0017] Figure 2 This is a second-view three-dimensional structural diagram of a blast furnace material porosity measuring device proposed in this utility model.

[0018] Figure 3 This is a partial cross-sectional structural diagram of a blast furnace material porosity measuring device proposed in this utility model.

[0019] Figure 4 This utility model proposes a device for measuring the porosity of blast furnace materials. Figure 2 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Gas source tank; 2. Booster pump; 3. Second connecting pipe; 4. Pressure valve; 5. First connecting pipe; 6. Pressure gauge; 7. Pressure relief valve; 8. Air inlet pipe; 9. Electronic scale; 10. Furnace charge tank; 11. Magnetic float level gauge; 12. Tank cover; 13. Union; 14. Hydraulic oil scale line; 15. Volume scale line. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1, referring to Figure 1-4 A blast furnace material porosity measuring device includes a gas source tank 1 and a furnace charge tank 10. The top of the furnace charge tank 10 is provided with a tank cover 12, and the middle of the tank cover 12 is provided with an air inlet pipe 8. The top of the air inlet pipe 8 is connected to a first connecting pipe 5. One end of the first connecting pipe 5 is connected to a pressure valve 4, and the other end of the first connecting pipe 5 is connected to a pressure relief valve 7. One end of the pressure relief valve 7 is connected to a pressurization mechanism.

[0023] The pressurization mechanism includes a second connecting pipe 3 connected to one end of the pressurization valve 4. One end of the second connecting pipe 3 is connected to the air outlet of the pressurization pump 2, and the air extraction end of the pressurization pump 2 is connected to the air outlet of the air source tank 1.

[0024] The inner wall of the furnace charge tank 10 is provided with a volume scale line 15, and a hydraulic oil scale line 14 is provided on the inner wall of the furnace charge tank 10 above the volume scale line 15.

[0025] An electronic scale 9 is installed at the bottom of the furnace charge tank 10, a pressure gauge 6 is installed on the first connecting pipe 5, and a magnetic float level gauge 11 is installed on the tank cover 12.

[0026] Working principle: A fixed mass (M material) of mixed furnace charge is horizontally and calmly placed in the furnace charge tank 10. The volume of the mixed furnace charge must be less than V total. The upper surface of the mixed furnace charge is lightly pressed to a horizontal state and its volume V material is measured through the volume scale line 15 of the furnace charge tank 10.

[0027] Hydraulic oil is added to the furnace charge tank 10 containing the furnace charge until it just submerges the volume scale line 15. The amount of hydraulic oil added and its density are recorded using an electronic scale 9. The volume of hydraulic oil added is V1.

[0028] Continue adding hydraulic oil to the hydraulic oil mark 14, and calculate the volume V2 of the second hydraulic oil added by measuring the mass change on the electronic scale 9.

[0029] After securing the tank cover 12 to ensure a seal, open the gas source tank 1 and the booster pump 2 to pressurize the inside of the furnace charge tank 10. Observe the pressure inside the tank through the pressure gauge 6 until it reaches the detection pressure (the detection pressure can be set according to the internal pressure of the blast furnace and the location of the material layer).

[0030] The change in liquid level after stamping is measured by magnetic float level gauge 11, and the volume of the liquid level change is equal to the volume of porosity reduction ΔV.

[0031] The porosity of the furnace charge under normal pressure and the porosity under the test pressure can be calculated using Vtotal, Vmaterial, V1, V2, and ΔV.

[0032] Example 2 is an optimization based on Example 1, specifically:

[0033] The air intake pipe 8 is installed in the middle of the tank cover 12 via a union 13, and the bottom end of the air intake pipe 8 extends to the inside of the tank cover 12.

[0034] The air inlet pipe 8 can be easily and quickly removed and installed on the tank cover 12 via the union 13.

[0035] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A device for measuring the porosity of blast furnace materials, comprising a gas source tank (1) and a charge tank (10), characterized in that, The top of the furnace charge tank (10) is provided with a tank cover (12), and an air inlet pipe (8) is provided in the middle of the tank cover (12). The top of the air inlet pipe (8) is connected to a first connecting pipe (5). One end of the first connecting pipe (5) is connected to a pressure valve (4), and the other end of the first connecting pipe (5) is connected to a pressure relief valve (7). One end of the pressure relief valve (7) is connected to a pressure boosting mechanism.

2. The blast furnace material porosity measuring device according to claim 1, characterized in that, The pressurization mechanism includes a second connecting pipe (3) connected to one end of the pressurization valve (4), one end of the second connecting pipe (3) is connected to the air outlet of the pressurization pump (2), and the air extraction end of the pressurization pump (2) is connected to the air outlet of the air source tank (1).

3. The blast furnace material porosity measuring device according to claim 1, characterized in that, A magnetic float level gauge (11) is installed on the tank cover (12).

4. The blast furnace material porosity measuring device according to claim 1, characterized in that, The inner wall of the furnace charge tank (10) is provided with a volume scale line (15), and the inner wall of the furnace charge tank (10) and above the volume scale line (15) is provided with a hydraulic oil scale line (14).

5. The blast furnace material porosity measuring device according to claim 1, characterized in that, The air inlet pipe (8) is installed in the middle of the tank cover (12) via a union (13), and the bottom end of the air inlet pipe (8) extends to the inside of the tank cover (12).

6. The blast furnace material porosity measuring device according to claim 1, characterized in that, An electronic scale (9) is installed at the bottom of the furnace charge tank (10).

7. The blast furnace material porosity measuring device according to claim 1, characterized in that, A pressure gauge (6) is installed on the first connecting pipe (5).

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