Molten iron component detection device

Abstract

The utility model relates to the technical field of blast furnace production, in particular to a molten iron component detection device. According to the technical scheme, the device comprises a surrounding shell, a first fixing rod, a second fixing rod, thermocouples and a furnace body, the first fixing rod and the second fixing rod are symmetrically arranged in the furnace body, and the thermocouples are installed on the first fixing rod and the second fixing rod; the distribution height of the thermocouples on the first fixing rod and the distribution height of the thermocouples on the second fixing rod are distributed in a staggered mode. Through cooperation of the structures, the temperature in the furnace is stabilized, the content of sulfur and phosphorus in molten iron is reduced, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace production, in particular to a molten iron component detection device. Background Art

[0002] Phosphorus is a harmful element for most steel grades. High phosphorus content in steel can cause cold brittleness of steel, thus affecting the mechanical properties and welding performance of steel. Therefore, it is necessary to control the phosphorus content during the smelting process. In the blast furnace ironmaking process, almost all the phosphorus in the iron ore enters the molten iron.

[0003] For ordinary ores with low phosphorus content, almost all of the phosphorus is reduced into pig iron during blast furnace smelting. The increase in the phosphorus content of the ore is the main reason for the increase in the phosphorus content of the molten iron. The blast furnace hearth temperature also affects the phosphorus content of the molten iron. The unstable furnace temperature will also lead to an increase in the phosphorus content of the molten iron.

[0004] To this end, we propose a molten iron composition detection device to solve the existing problems. Utility Model Content

[0005] The utility model aims to provide a device for detecting the composition of molten iron in view of the problems existing in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a molten iron composition detection device, comprising a shell, a first fixed rod, a second fixed rod, a thermocouple and a furnace body, wherein the interior of the furnace body is symmetrically provided with a first fixed rod and a second fixed rod, and each of the thermocouples is installed on the first fixed rod and the second fixed rod, and the distribution height of the thermocouples on the first fixed rod is staggered with the distribution height of the thermocouples on the second fixed rod.

[0007] Preferably, a base is cast at the bottom end of the furnace body;

[0008] The base is arranged in the enclosure, and the top inner part of the enclosure is fixed on the lower outer wall of the furnace body.

[0009] Preferably, a slag discharge port is provided on one side of the inner wall of the lower end of the furnace body;

[0010] The enclosure is provided with a through hole matched with the slag discharge port, and the slag discharge port is embedded in and penetrates the through hole.

[0011] Preferably, a tap hole is provided on one side of the inner wall at the bottom end of the furnace body;

[0012] The enclosure is provided with a through hole matched with the iron outlet, and the iron outlet is embedded in and penetrates the through hole.

[0013] Preferably, the upper end of the furnace body is provided with mounting holes adapted to the first fixing rod and the second fixing rod respectively;

[0014] The first fixing rod and the second fixing rod are respectively embedded and fixed on the two mounting holes. Connectors are installed on the top ends of the first fixing rod and the second fixing rod. Wires are connected to the connectors.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] During use, the utility model molten iron component detection device is designed with a blast furnace temperature monitoring structure, and each staggeredly distributed thermocouple monitors the temperature in the furnace in real time, monitors the temperature of each area in the furnace, and feeds back the monitoring data in combination with the correction coefficient to the computer display terminal, sets the temperature threshold of different parts of the blast furnace, and generates an early warning when the temperature is lower than the threshold and performs corresponding temperature increase treatment, thereby achieving the effect of real-time detection of molten iron content, ensuring the stability of the temperature in the furnace, improving product quality, and reducing comprehensive costs;

[0017] The utility model stabilizes the temperature in the furnace, reduces the content of sulfur and phosphorus in molten iron, and improves product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0020] Figure 3 It is a cross-sectional structural schematic diagram of the utility model;

[0021] Figure 4 It is a front structural schematic diagram of the utility model.

[0022] Reference numerals:

[0023] 1. Shell; 2. Base; 3. First fixing rod; 4. Second fixing rod; 5. Connector; 6. Wire; 7. Thermocouple; 8. Furnace body; 9. Slag discharge port; 10. Iron outlet. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1

[0026] like Figure 1-Figure 4 As shown, a molten iron composition detection device proposed in the utility model includes a shell 1, a first fixed rod 3, a second fixed rod 4, a thermocouple 7 and a furnace body 8, the first fixed rod 3 and the second fixed rod 4 are symmetrically arranged inside the furnace body 8, and each thermocouple 7 is installed on the first fixed rod 3 and the second fixed rod 4, and the distribution height of the thermocouple 7 on the first fixed rod 3 and the distribution height of the thermocouple 7 on the second fixed rod 4 are staggered.

[0027] Based on Example 1:

[0028] Design a blast furnace temperature monitoring system, set staggered thermocouples 7 in the blast furnace to monitor the temperature of each area in the furnace, establish a temperature curve model based on the monitoring data and combined with the correction coefficient to feed back to the computer display terminal, set temperature thresholds for different parts of the blast furnace, and issue an early warning if the temperature is below the threshold and perform corresponding temperature increase treatment, so as to achieve the effect of real-time detection of molten iron content;

[0029] For common ores with low phosphorus content, almost all phosphorus is reduced to pig iron during blast furnace smelting. The increase in phosphorus content in ore is the main reason for the increase in phosphorus content in molten iron. The blast furnace hearth temperature also affects the phosphorus content in molten iron. Phosphorus reduction is an endothermic reaction. A high hearth temperature and abundant heat are conducive to phosphorus reduction. Therefore, controlling the stability of the hearth temperature is an effective measure to reduce phosphorus enrichment in the furnace and reduce phosphorus content.

[0030] Adding appropriate phosphorus removers can help reduce the phosphorus content in molten iron. Commonly used phosphorus removers include lime, calcium oxide, apatite, etc. These removers react with phosphorus in molten iron to form calcium phosphate or other compounds, thereby removing phosphorus from the molten iron. At the same time, choosing low-phosphorus pig iron, iron ore and reducing agents as raw materials can also reduce the phosphorus content in molten iron.

[0031] Embodiment 2

[0032] like Figure 1-Figure 4 As shown, the molten iron composition detection device proposed by the utility model, compared with the first embodiment, this embodiment also includes:

[0033] The bottom end of the furnace body 8 is cast with a base 2;

[0034] The base 2 is arranged in the enclosure 1, and the top inner part of the enclosure 1 is fixed on the lower outer wall of the furnace body 8, and a slag discharge port 9 is opened on one side of the lower inner wall of the furnace body 8;

[0035] The enclosure 1 is provided with a through hole matched with the slag discharge port 9, the slag discharge port 9 is embedded in and penetrates the through hole, and a tapping port 10 is provided on one side of the inner wall at the bottom end of the furnace body 8;

[0036] The enclosure 1 is provided with a through hole matched with the iron outlet 10 , and the iron outlet 10 is embedded in and penetrates the through hole.

[0037] In addition to separating slag iron, blast furnace slag also needs to remove sulfur from pig iron to ensure that the pig iron quality meets the standard. The desulfurization reaction must consume the carbon in the coke and is a direct reduction process.

[0038] The higher the iron oxide content in the slag, the more unfavorable it is for the desulfurization reaction to proceed. The conditions for ensuring the desulfurization of pig iron are to maintain the necessary furnace temperature, maintain the necessary slag basicity, and use furnace charges with good reducibility as much as possible to improve the reduction process. The sulfur in the foundry pig iron increases the viscosity of the molten iron, the filling property of the pouring is poor, and many bubbles are generated, resulting in reduced strength of the casting. Reducing the total sulfur brought into the charge and reducing the sulfur content of the raw fuel entering the furnace are the fundamental ways and effective measures to reduce the sulfur content of pig iron and obtain high-quality pig iron.

[0039] Most of the sulfur in the charge is brought in by coke. Reducing the coke ratio is beneficial to reducing the amount of sulfur introduced. Smelting high-temperature pig iron is beneficial to volatilization and desulfurization, improving the desulfurization capacity of the slag. The larger the slag volume, the lower the concentration of sulfur in the slag, which is more conducive to the transfer of sulfur from pig iron to slag.

[0040] The upper end of the furnace body 8 is provided with mounting holes adapted to the first fixing rod 3 and the second fixing rod 4 respectively;

[0041] The first fixing rod 3 and the second fixing rod 4 are respectively embedded and fixed on the two mounting holes. The top ends of the first fixing rod 3 and the second fixing rod 4 are both installed with connecting heads 5, and the connecting heads 5 are connected with wires 6. Through the cooperation of the above structure, the external control unit can be connected through the wires 6 to control the operation of the thermocouple 7.

[0042] It should be noted that the structure of the thermocouple 7 is an existing mature technology, and its working principle and internal structure are known to technicians in the relevant technical field. The utility model only utilizes its function and does not improve its internal structure. Therefore, it will not be described in detail here, and technicians in this field can make any selection according to their needs or convenience.

[0043] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

[0044] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A molten iron composition detection device, comprising a casing (1), a first fixing rod (3), a second fixing rod (4), a thermocouple (7) and a furnace body (8), characterized in that: A first fixing rod (3) and a second fixing rod (4) are symmetrically arranged inside the furnace body (8), and each of the thermocouples (7) is mounted on the first fixing rod (3) and the second fixing rod (4), and the distribution height of the thermocouples (7) on the first fixing rod (3) and the distribution height of the thermocouples (7) on the second fixing rod (4) are staggered.

2. A molten iron composition detection device according to claim 1, characterized in that: The bottom end of the furnace body (8) is cast with a base (2); The base (2) is arranged in the enclosure (1), and the top inner part of the enclosure (1) is fixed to the lower outer wall of the furnace body (8).

3. The molten iron composition detection device according to claim 1, characterized in that: A slag discharge port (9) is provided on one side of the inner wall of the lower end of the furnace body (8); The enclosure (1) is provided with a through hole matched with the slag discharge port (9), and the slag discharge port (9) is embedded in and penetrates the through hole.

4. A molten iron composition detection device according to claim 1, characterized in that: A tap hole (10) is provided on one side of the inner wall at the bottom end of the furnace body (8); The enclosure (1) is provided with a through hole matched with the iron outlet (10), and the iron outlet (10) is embedded in and penetrates the through hole.

5. The molten iron composition detection device according to claim 1, characterized in that: The upper end of the furnace body (8) is provided with mounting holes respectively matched with the first fixing rod (3) and the second fixing rod (4); The first fixing rod (3) and the second fixing rod (4) are respectively embedded and fixed in two mounting holes; the top ends of the first fixing rod (3) and the second fixing rod (4) are both installed with connectors (5); and the connectors (5) are connected with wires (6).

Images