A special tilting chute for continuous slagging of a side-blown furnace

Abstract

The utility model discloses a special tilting chute for the continuous slagging of side-blown furnace, which comprises a chute main body, a chute support, a hinged seat and a pull ring. The chute main body is a water jacket chute. A cooling water inlet pipe and a cooling water outlet pipe are respectively connected to the inner wall of the chute main body. The cooling water in the cooling water inlet pipe and the cooling water outlet pipe exchanges heat with the inner wall of the chute main body. The utility model adopts a winch and a steel wire rope to pull the chute, thereby achieving the effect that the chute can be tilted left and right and ensuring continuous slagging during the replacement of a slag ladle. The chute outlet is plated with an alloy, thereby avoiding the risk of the water jacket of the chute being damaged due to long-term erosion and greatly increasing the service life of the water jacket of the chute. The setting of the ring air collecting port solves the phenomenon of unorganized smoke dispersion during the slagging process and ensures the environmental protection requirements of the site operation. The setting of the molten metal baffle effectively controls the range of splashing slag and ensures the safety of the slag ladle yard during the slagging operation.

Description

Technical Field

[0001] This utility model relates to an oxygen-enriched side-blown furnace smelting system, and more particularly to a special tilting chute for continuous slag discharge from a side-blown furnace. Background Technology

[0002] Copper concentrate, slag concentrate, flue dust, fuel, and flux are transported to their respective batching hoppers by grab bucket elevators. Various materials are continuously and quantitatively fed according to set proportions and quantities by electronic belt scales under the batching hoppers. All materials are collected and transported to the top of the smelting furnace via a main belt conveyor, entering the furnace through three charging ports on the furnace top. The oxygen-enriched double-sided blowing smelting furnace has 50 primary tuyeres and 20 secondary tuyeres. Oxygen-enriched air containing 60-85% O2 is introduced into the slag layer through the primary tuyeres on both sides of the smelting furnace, causing the added charge to melt and undergo a strong oxidation and slagging reaction to generate copper matte and slag. Matte-forming smelting takes place at a high temperature of 1230-1280℃, where copper sulfide concentrate and flux are smelted in the furnace. Copper and sulfur in the charge react with unoxidized iron to form liquid copper matte. SiO2, Al2O3, CaO, and other components in the charge react with FeO to form liquid slag. The slag is a melt of oxides mainly composed of 2FeO·SiO2 (ferroolitic). The copper matte and slag are essentially immiscible, and the slag has a lower density than the matte, thus achieving separation. The resulting copper matte and slag settle and separate in the hearth below the tuyeres. Copper matte with a grade of approximately 60% is siphoned into a ladle and transported to the converter for blowing using a metallurgical crane. The smelting slag is discharged from the overflow outlet at the other end of the furnace, flows through a chute into the slag ladle, and after slow cooling, is floated to obtain slag concentrate.

[0003] The slag containment volume used in the current smelting furnace is 12m³. 3 To ensure safety during slag bag transportation, slag bags are typically replaced when they are about 8 / 10 full, with each bag's operation taking approximately 25 minutes. Depending on the requirements of the next converter process, the smelting furnace alternates between charging matte and slag. Two bags of matte are charged at a time, taking about 50 minutes. The charging time for each operation is determined by the matte surface height, which varies depending on the ore quantity, matte grade, and charging time. Generally, each slag removal operation takes about one hour, meaning 2-3 bags of slag are removed per operation.

[0004] The existing technology has the following problems: 1. Due to the limited volume of the slag bag, the slag bag needs to be replaced during the slag discharge process. However, it is necessary to ensure continuous slag discharge and avoid frequent slag blockage and slag clearing operations, which would increase labor intensity and pose safety hazards.

[0005] 2. The slag temperature is generally between 1280℃ and 1300℃. During continuous operation, the chute may cause equipment safety hazards due to scouring during blasting.

[0006] 3. During the process of smelting slag entering the slag bag through the chute, there is a potential environmental hazard of low-altitude pollution caused by the unorganized emission of flue gas.

[0007] 4. During the process of smelting slag falling into the slag pot through the chute, some slag may splash due to the height difference, posing a safety hazard. Utility Model Content

[0008] To solve the above-mentioned technical problems, this utility model designs a special tilting chute for continuous slag discharge from a side-blown furnace, which ensures stable and continuous slag discharge from the smelting furnace, has good environmental protection effects, and controllable safety risks.

[0009] The present invention adopts the following technical solution: A special tilting chute for continuous slag discharge in a side-blown furnace includes a chute body, a chute support, a hinge seat, and a pull ring. The chute body includes an inlet section and an outlet section, which are connected in a "T" shape. The chute support is fixedly connected to the bottom of the chute body, and a hinge seat is fixedly installed below the chute support. The hinge seat is located on one side of the axis of symmetry of the chute support. A pull ring is provided on the chute support outside the hinge seat. The chute body is a water-jacketed chute. Cooling water inlet pipe and cooling water outlet pipe are respectively connected inside the pipe wall of the chute body. The cooling water in the cooling water inlet pipe and cooling water outlet pipe exchanges heat with the pipe wall of the chute body.

[0010] Preferably, the pull ring is driven by a motor via a reducer, which pulls a steel wire rope. The motor provides continuous and stable power output. The reducer reduces speed while increasing output torque and includes a limit switch to restrict the tilt angle.

[0011] Preferably, a pulley system is provided between the pull ring and the reducer to pull the steel wire rope. The pulley system consists of a wound steel wire rope that pulls the tilting chute.

[0012] Preferably, a ring-shaped air collection pipe is provided above the outlet of the inlet section of the chute body, and a ring-shaped air collection fan is connected to the end of the ring-shaped air collection pipe. The ring-shaped air collection fan provides ring suction to absorb the unorganized flue gas during the slag discharge process through the ring-shaped air collection pipe.

[0013] Preferably, a melt baffle is added to the top of the outlet section at the inlet section of the sluice body. This prevents injury from slag splashing due to height difference during slag discharge.

[0014] Preferably, an anti-erosion alloy layer is added to the outlet section at the inlet section of the chute body. Since the slag discharge point is singular, an alloy is plated on the surface at the discharge point to prevent erosion.

[0015] Preferably, the inlet of the annular air duct is equipped with a grille to prevent debris from entering and clogging the duct.

[0016] The beneficial effects of this utility model are: (1) It provides a special tilting chute for smelting furnaces that ensures continuous and stable slag discharge, has good safety and environmental protection effects, and has a long service life. The wire rope traction of the winch allows the slag discharge of the chute to be switched left and right, realizing the possibility of continuous slag discharge and ensuring the orderly alternation of slag discharge and copper discharge operations. While stabilizing production, it greatly reduces the labor intensity of the operators; (2) The slag discharge chute is set as a water jacket chute, and the cooling water is circulated to cool down, increasing the service life of the chute. In particular, the alloy is plated at the slag discharge point to avoid the safety risk of the water jacket breaking and blasting. The service life of the slag discharge chute is greatly increased, providing strong support for continuous production; (3) The added ring collecting air port solves the environmental protection problem of unorganized flue gas emission at the three-way junction of the tilting chute, effectively protecting the working environment of the production site. Moreover, the grid of the ring collecting port avoids debris from entering the ring collecting pipe and causing blockage, ensuring the absorption efficiency of the ring collecting flue gas; (4) After the smelting slag falls from the long chute into the tilting chute, it flows into the slag bag. Due to the height difference between the long chute and the tilting chute, some slag will splash during the process, which not only poses a safety hazard to pedestrians and vehicles at the slag bag truck site, but also causes slag to accumulate and the slag bags to be placed unevenly. The installation of baffles effectively prevents slag from splashing, greatly improving the cleanliness, stability and safety of the work site. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 A left view; Figure 3 yes Figure 1 A top view; Figure 4 yes Figure 2 A cross-sectional view of the inlet end of the central ring air collection duct; In the diagram: 1. Motor, 2. Reducer, 3. Pulley block, 4. Melt baffle, 5. Circular air duct, 6. Circular air fan, 7. Cooling water inlet pipe, 8. Cooling water outlet pipe, 9. Anti-erosion alloy layer, 10. Chute body, 11. Chute support, 12. Hinge seat, 13. Pull ring, 14. Inlet section, 15. Outlet section. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings: Example: Figures 1-3As shown, a special tilting chute for continuous slag discharge in a side-blown furnace includes a chute body 10, a chute support 11, a hinge seat 12, and a pull ring 13. The chute body includes an inlet section 14 and an outlet section 15, which are connected in a "T" shape. The chute support is fixedly connected to the bottom of the chute body, and a hinge seat is fixedly installed below the chute support. The hinge seat is located on one side of the axis of symmetry of the chute support. A pull ring is provided on the chute support outside the hinge seat. The chute body is a water-jacketed chute. Cooling water inlet pipe 7 and cooling water outlet pipe 8 are respectively connected inside the pipe wall of the chute body. The cooling water in the cooling water inlet pipe and the cooling water outlet pipe exchanges heat with the pipe wall of the chute body.

[0019] The pull ring is pulled by a steel wire rope driven by motor 1 through reducer 2. Motor: Provides continuous and stable power output. Reducer: Reduces speed while increasing output torque, and also has a limit switch to restrict the tilt angle.

[0020] A pulley block 3 is installed between the pull ring and the reducer to pull the steel wire rope. Pulley block: The steel wire rope is wound to pull the tilting chute.

[0021] A ring-collecting air duct 5 is installed above the outlet of the inlet section of the chute body. A ring-collecting fan 6 is connected to the end of the ring-collecting air duct. The ring-collecting fan provides ring-collecting suction to absorb the unorganized flue gas during the slag discharge process through the ring-collecting air duct.

[0022] A melt baffle 4 is installed at the top of the outlet section of the sluice box at the inlet section of the main body of the sluice box. This is to prevent slag splashing and injury caused by height difference during slag discharge.

[0023] An anti-erosion alloy layer 9 is added to the outlet section at the inlet section of the sluice main body. Since the slag discharge point is singular, an alloy is plated on the surface at the discharge point to avoid erosion.

[0024] like Figure 4 As shown, the inlet of the annular duct is equipped with a grille to prevent debris from entering and clogging the duct.

[0025] This invention employs a winch and wire rope to pull the chute, enabling the chute to tilt left and right, ensuring continuous slag discharge during slag bag replacement. The slag discharge point of the chute is alloy-plated to prevent the risk of blasting due to long-term erosion of the chute's water jacket, significantly increasing the lifespan of the water jacket. The annular air inlet solves the problem of unorganized flue gas dispersion during slag discharge, ensuring environmental protection requirements for on-site operations. The molten metal baffle effectively controls the range of slag splashing, ensuring the safety of the slag bag truck area during slag discharge operations.

[0026] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A dedicated tilting chute for continuous slag discharge in a side-blown furnace, comprising a chute body, a chute support, a hinge seat, and a pull ring. The chute body includes an inlet section and an outlet section, which are connected in a "T" shape. The chute support is fixedly connected to the lower part of the chute body. A hinge seat is fixedly installed below the chute support, located on one side of the symmetry axis of the chute support. A pull ring is provided on the chute support outside the hinge seat. The chute body is characterized in that... The main body of the chute is a water-jacketed chute. Cooling water inlet pipe and cooling water outlet pipe are connected to the pipe wall of the chute main body respectively. The cooling water in the cooling water inlet pipe and cooling water outlet pipe exchanges heat with the pipe wall of the chute main body.

2. A special tilting chute for continuous slag discharge in a side-blown furnace according to claim 1, characterized in that, The pull ring is pulled by a steel wire rope driven by a motor through a reducer.

3. A special tilting chute for continuous slag discharge in a side-blown furnace according to claim 2, characterized in that, A pulley block and a traction steel wire rope are installed between the pull ring and the reducer.

4. A special tilting chute for continuous slag discharge in a side-blown furnace according to claim 1, characterized in that, A ring-shaped air collection pipe is installed above the outlet of the inlet section of the chute body. A ring-shaped air collection fan is connected to the end of the ring-shaped air collection pipe. The ring-shaped air collection fan provides ring suction to absorb the unorganized flue gas during the slag discharge process through the ring-shaped air collection pipe.

5. A special tilting chute for continuous slag discharge in a side-blown furnace according to claim 1, characterized in that, A melt baffle is added to the top of the outlet section at the outlet of the chute body.

6. A special tilting chute for continuous slag discharge in a side-blown furnace according to claim 1, characterized in that, An anti-erosion alloy layer is added to the outlet section at the outlet of the chute body.

7. A special tilting chute for continuous slag discharge in a side-blown furnace according to claim 4, characterized in that, The opening of the annular air collection duct is equipped with a grille.

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