Device for measuring matte surface of oxygen-enriched side-blown converter

Abstract

The utility model discloses a copper matte surface measuring device for an oxygen-enriched side-blown converter, which comprises a three-layer structure, the first layer is provided with a small slag chamber of a smelting furnace, the small slag chamber is provided with a copper measuring port, the second layer is used for hanging a copper measuring rod and is provided with a copper measuring graduated scale corresponding to the copper measuring rod, and the third layer is provided with a motor, a speed reducer, a winch and a stable support bracket. A hollow column is vertically arranged on the stable supporting bracket, a steel wire rope penetrates through the hollow column, and the bottom of the steel wire rope is used for hanging a measuring copper rod. According to the utility model, hexagonal steel for measuring copper is replaced by 50mm round steel, so that the device is more durable, and the frequency of replacing copper bars is reduced; the copper measuring graduated scale can be used for quickly and accurately measuring a matte surface without contacting a high-temperature copper measuring rod, and is safe and efficient; due to the arrangement of the air suction smoke hood, unorganized smoke dispersed in the copper measuring process is effectively eliminated, and the environment-friendly working environment is guaranteed; and when the copper measuring rod is bent at high temperature or ablated and thinned due to use frequency increase, the replacement is convenient, and the normal production rhythm is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of copper smelting, in particular to a matte level measuring device for an oxygen-enriched side-blown furnace. Background Art

[0002] Copper concentrate, slag concentrate, soot, fuel and flux are respectively transported to their respective batching hoppers by a grab hoist. Various materials are continuously and quantitatively fed by an electronic belt scale under the batching hopper according to the set proportion and quantity. Various materials are gathered on the total belt conveyor and transported to the top of the smelting furnace, and enter the smelting furnace through three charging ports on the top of the furnace. The oxygen-enriched double-side blowing smelting furnace is provided with 50 primary tuyeres and 20 secondary air pipes. Oxygen-enriched air containing 60-85% O₂ is sent into the slag layer through the primary tuyeres on both sides of the smelting furnace, so that the added furnace charge is melted and undergoes strong oxidation and slag-making reactions to generate matte and slag. Matte smelting is carried out at a high temperature of 1230-1280 °C, so that copper sulfide concentrate and flux are smelted in the smelting furnace. Copper, sulfur and unoxidized iron in the furnace charge form liquid matte. Components such as SiO₂, Al₂O₃, and CaO in the furnace charge form liquid slag together with FeO. The slag is an oxide melt mainly composed of 2FeO·SiO₂ (fayalite). Matte and slag are basically immiscible, and the density of the slag is smaller than that of the matte, so as to achieve separation.

[0003] The obtained matte and slag precipitate and separate in the hearth below the tuyeres. Matte with a grade of about 60% is discharged into the ladle through a siphon and transported to the converter for blowing by a metallurgical crane. The smelting slag is discharged from the overflow port at the other end of the smelting furnace, enters the slag ladle through a chute, and the molten slag is slowly cooled and then flotated to obtain slag concentrate.

[0004] In order to reasonably adjust the siphon discharge time of matte, it is necessary to regularly locate the height of the matte liquid level in the molten bath. If the matte level is too high, it will erode the upper flat copper water jacket and the primary air copper water jacket, causing risks of copper water jacket leakage and melt leakage. If the matte level is too low, the slag will erode the bottom magnesia-chrome brick. At the same time, the slag may flow out from the siphon port and cannot be blocked, forming a potential safety hazard in production. At present, there are two methods for measuring the matte level. One is theoretical calculation. According to the metal amount of the copper concentrate fed into the furnace, the grade of the produced hot matte, and the hearth area of the furnace, calculate the rising height of the matte level per hour, so as to obtain the matte level. The other is to use a long hexagonal steel to extend into the molten bath of the small slag chamber, and roughly estimate the matte level according to the slag and matte attached to the hexagonal steel.

[0005] However, the existing matte level measurement has the following defects:

[0006] 1. There will be deviations in theoretical calculation. When the grade of hot matte fluctuates and the metering belt has metering errors, the actual matte level deviates greatly from the theoretically calculated value and cannot be accurately calculated.

[0007] 2. The hexagonal steel has a short lifespan and is prone to melting. Due to frequent immersion in the high-temperature melt, the hexagonal steel is easily melted and needs to be replaced frequently, and the replacement process is cumbersome.

[0008] 3. When measuring the matte surface on the hexagonal steel, there is a safety hazard of high-temperature scalding.

[0009] 4. When measuring copper, it is not easy to measure due to the dispersion of unorganized flue gas. When measuring copper, since the cover opening is lifted and the flue gas escapes, it not only affects the operation of the copper measurement operators, but also causes environmental pollution. Utility Model Content

[0010] To solve the above technical problems, the present utility model designs a matte surface measurement device for an oxygen-enriched side-blown furnace.

[0011] The present utility model adopts the following technical solutions:

[0012] A matte surface measurement device for an oxygen-enriched side-blown furnace includes a three-layer structure. The first layer is provided with a small slag chamber of the smelting furnace. A copper measurement port is opened on the small slag chamber, and a copper measurement port cover plate is provided at the copper measurement port. The second layer is used for hanging a copper measurement rod and a copper measurement scale corresponding to the copper measurement rod. The third layer is provided with a motor, a reducer, a winch and a stable support bracket. A hollow column is vertically arranged on the stable support bracket, and a steel wire rope passes through the hollow column. The bottom of the steel wire rope is used for hanging the copper measurement rod, and the winch is used for extending and retracting the steel wire rope. The motor and the reducer are used to provide power for the winch. The small slag chamber is the position area of the smelting furnace where the copper measurement rod is immersed when measuring the matte surface.

[0013] Preferably, a nut is welded to the top of the copper measurement rod for fixedly connecting the wire clamp at the end of the steel wire rope. This facilitates the installation and replacement of the copper measurement rod.

[0014] Preferably, the copper measurement port cover plate seals the copper measurement port and is rotatably connected to the copper measurement port, and the copper measurement port is opened and closed by rotation. It is rotated and moved away during copper measurement and rotated and covered to restore after measurement.

[0015] Preferably, pulleys are arranged between the winch and the stable support bracket and on the stable support bracket for the transmission and guiding of the steel wire rope. This avoids the breakage of the wire strands caused by the friction of the steel wire rope.

[0016] Preferably, a steel wire rope stopper is arranged between the winch and the stable support bracket. This defines the limit during copper measurement and avoids overextension and retraction of the steel wire rope.

[0017] Preferably, an air suction hood is arranged at the copper measurement port on the small slag chamber, and an annular collecting fan is connected to the air suction hood through a pipeline. This is used to centrally collect the unorganized flue gas dispersed during copper measurement.

[0018] Preferably, the total length of the copper measurement scale is 1400 mm, the scale interval of each section is 100 mm, and a handle is welded at the midpoint of the equal division.

[0019] Preferably, the copper measuring rod is made of round steel with a diameter of 50 mm.

[0020] The beneficial effects of the utility model are as follows: (1) A safe, convenient, highly accurate and environmentally friendly matte surface measuring device is provided for the smelting furnace, which is conducive to the production team regularly measuring the matte surface, controlling the height of the matte surface, and timely discharging the matte. This not only avoids the matte surface being too high to erode the copper water jacket, but also can accurately match the production rhythm of the converter, stably provide hot matte, and ensure an orderly production rhythm; (2) It greatly facilitates the operation of replacing the copper measuring rod. Without affecting the production rhythm, the copper measuring rod can be quickly and effectively replaced, ensuring the timely measurement of the matte surface and reducing the operation difficulty of the machine repair and maintenance personnel; (3) Compared with the original matte surface measuring device, the improved device has a longer service life of the copper measuring rod, which can greatly reduce the replacement times; (4) The matte surface is measured accurately. By comparing the scales with the scale ruler, the height of the matte surface in the molten pool can be obtained conveniently and quickly, and the production rhythm can be adjusted in time; (5) Safe and environmentally friendly. Without directly contacting the high-temperature melt, the height of the matte surface can be obtained by using tools, and the setting of the annular collecting suction hood effectively restrains the unorganized flue gas emission, ensuring a safe and environmentally friendly production operation environment. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the utility model;

[0022] In the figure: 1. Motor, 2. Reducer, 3. Winch, 4. Steel wire rope limiter, 5. Pulley, 6. Stable support bracket, 7. Copper measuring rod, 8. Copper measuring port cover plate, 9. Suction hood, 10. Annular collecting fan, 11. Small slag chamber, 12. Copper measuring scale ruler. Detailed Embodiments

[0023] The technical solutions of the present utility model will be further specifically described below through specific embodiments in conjunction with the drawings:

[0024] Embodiment: As Figure 1 shown, an oxygen-enriched side-blown furnace matte surface measuring device includes a three-layer structure. The first layer is provided with a small slag chamber 11 of the smelting furnace. A copper measuring port is opened on the small slag chamber, and a copper measuring port cover plate 8 is arranged at the copper measuring port. The second layer is used for hanging the copper measuring rod 7 and a copper measuring scale ruler 12 corresponding to the copper measuring rod. The third layer is provided with a motor 1, a reducer 2, a winch 3 and a stable support bracket 6. A hollow column is vertically arranged on the stable support bracket, and a steel wire rope passes through the hollow column. The bottom of the steel wire rope is used for hanging the copper measuring rod, and the winch is used for extending and retracting the steel wire rope. The motor and the reducer are used to provide power for the winch. When measuring the matte surface in the small slag chamber, the copper measuring rod is immersed in the position area of the smelting furnace.

[0025] A nut is welded to the top of the copper measuring rod for fixing and connecting the wire clamp at the end of the wire rope. It facilitates the installation and replacement of the copper measuring rod.

[0026] The cover plate of the copper measuring port seals the copper measuring port and is rotatably connected to the copper measuring port to open and close the copper measuring port by rotation. It is rotated and removed during copper measurement and rotated to cover and restore after measurement.

[0027] A pulley 5 is arranged between the winch and the stable support bracket and on the stable support bracket for the transmission and guidance of the wire rope. It avoids the strand breakage caused by the friction of the wire rope.

[0028] A wire rope stopper 4 is arranged between the winch and the stable support bracket. It defines the limit during copper measurement to avoid overextension and contraction of the wire rope.

[0029] An inhalation hood 9 is arranged at the copper measuring port on the upper part of the small slag chamber, and a ring collecting fan 10 is connected in the inhalation hood through a pipeline. It is used to centrally collect the unorganized flue gas dispersed during copper measurement.

[0030] The total length of the copper measuring scale is 1400 mm, the scale interval of each section is 100 mm, and a handle is welded at the middle of the equal division. The copper measuring rod is made of round steel with a diameter of 50 mm.

[0031] In this utility model, the hexagonal steel for copper measurement is replaced by round steel with a diameter of 50 mm, which is more durable and reduces the frequency of replacing the copper measuring rod; by using the prefabricated copper measuring scale, the copper matte surface can be quickly and accurately measured without contacting the high-temperature copper measuring rod, which is safe and efficient; the setting of the inhalation hood effectively eliminates the unorganized flue gas dispersed during the copper measurement process and ensures an environmentally friendly working environment; when the copper measuring rod is bent due to high temperature or becomes thinner due to increased use frequency, it is convenient to replace and does not affect the normal production rhythm.

[0032] The above-described embodiments are only a preferred solution of this utility model, and do not impose any form of limitation on this utility model. There are other variants and modifications without exceeding the technical solutions recorded in the claims.

Claims

1. A device for measuring the matte surface of an oxygen-enriched side-blown furnace, characterized in that: It includes a three-layer structure. The first layer is provided with a small slag chamber of a smelting furnace. A copper measuring port is opened on the small slag chamber, and a copper measuring port cover is provided at the copper measuring port. The second layer is used for hanging a measuring copper rod and a copper measuring scale is provided corresponding to the measuring copper rod. The third layer is provided with a motor, a reducer, a winch and a stable support bracket. A hollow column is vertically arranged on the stable support bracket, and a steel wire rope passes through the hollow column. The bottom of the steel wire rope is used for hanging the measuring copper rod. The winch is used to extend and retract the steel wire rope, and the motor and the reducer are used to provide power for the winch.

2. The device for measuring the copper matte surface of an oxygen-enriched side-blown furnace according to claim 1 is characterized in that: A nut is welded on the top of the measuring copper rod and is used to fix a wire clamp connected to the end of the wire rope.

3. The device for measuring the copper matte surface of an oxygen-enriched side-blown furnace according to claim 1 is characterized in that: The copper measuring opening cover plate seals the copper measuring opening, is rotatably connected to the copper measuring opening, and opens and closes the copper measuring opening by rotation.

4. The device for measuring the copper matte surface of an oxygen-enriched side-blown furnace according to claim 1 is characterized in that: Pulleys are arranged between the hoist and the stable support bracket and on the stable support bracket for transmission and guidance of the steel wire rope.

5. The device for measuring the matte surface of an oxygen-enriched side-blown furnace according to claim 1 is characterized in that: A wire rope limiter is arranged between the hoist and the stable support bracket.

6. The device for measuring the matte surface of an oxygen-enriched side-blown furnace according to claim 1 is characterized in that: An air suction hood is arranged at the copper measuring port on the small slag chamber, and the air suction hood is connected with a ring air collector through a pipeline.

7. The device for measuring the matte surface of an oxygen-enriched side-blown furnace according to claim 1 is characterized in that: The copper measuring ruler has a total length of 1400 mm, each scale interval is 100 mm, and a handle is welded in the middle of the equal divisions.

8. The device for measuring the matte surface of an oxygen-enriched side-blown furnace according to claim 1 is characterized in that: The copper measuring rod is made of round steel with a diameter of 50 mm.

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