Abrasion-resistant structure of spray gun of Ausmelt top-blowing furnace

Abstract

The utility model relates to the field of restraining of converting furnaces, in particular to a wear-resistant structure of a spray gun of an Ausmelt top-blown furnace. Comprising an inverted-L-shaped fixing table, a fixing pipe is arranged at the outer end of a horizontal section of the fixing table, a sliding pipe is slidably sealed in the bottom end of the fixing pipe, a rotating joint is in butt joint with the bottom of the sliding pipe, and a spraying gun spraying pipe is in butt joint with a rotating section on the lower portion of the rotating joint; the top of the rotary driving mechanism is fixed to the sliding pipe, a hoisting mechanism connected with the rotary driving mechanism is arranged at the top of the fixed table, and the outer side of the spray gun spray pipe is coated with an alloy steel pipe. The alloy steel No.3 steel pipe is coated outside the spray pipe of the spray gun, so that the wear resistance of the whole spray pipe structure is improved, the service life of the spray pipe is prolonged, and the loss and waste of manpower and material resources are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of blowing furnace restraint, in particular to an Ausmelt top-blowing furnace spray gun wear-resistant structure. Background Art

[0002] The main principle of top-blowing submerged smelting method is to directly blow air or oxygen-enriched air, fuel, powdered material and flux or reducing gas into the molten pool built of refractory materials through a spray gun inserted vertically into the slag layer, and strongly stir the molten pool to cause the charge to undergo intense physical and chemical processes such as melting, sulfidation, oxidation, reduction (depending on the carbonaceous reducing agent in the charge), and slagging. It is a continuous smelting process. Fuel and powder are sprayed into the molten pool through a spray gun, and block materials and wet materials can be added from a feeding hole opened on the top of the furnace through a screw feeder. It can continuously feed and discharge slag to keep the melt volume and temperature relatively stable. During the discharge process, the feeding can also be interrupted to leave a layer of melt in the furnace for the next feeding cycle. According to the properties of the gas sprayed from the spray gun and the adjustment of the charge composition, the smelting process can arbitrarily control different atmospheres to carry out oxidation and reduction processes respectively.

[0003] Prior art 202320066392.6 discloses a spray gun device for a blowing furnace, which includes a lifting mechanism; the telescopic end of the telescopic sleeve is docked with the fixed end of the rotary joint, the rotating end of the rotary joint is docked with the top end of the connecting pipe, and a clamping mechanism is fixed to the bottom end of the connecting pipe; the rotary drive mechanism is transmission-connected to the outer wall of the connecting pipe; the end of the steel cable of the lifting mechanism is connected to the rotary drive mechanism through a tension sensor; although under the action of the lifting mechanism, the spray gun barrel is lowered into the blowing furnace, under the action of the rotary drive mechanism, the spray gun barrel is driven to rotate to reduce the amount of slag sticking to the spray gun barrel; during the spray gun operation, the weight of the lifting mechanism can be detected in real time through the tension sensor, and when the amount of slag sticking to the spray gun barrel causes the tension sensor to When the tensile force detected by the sensor is close to the upper limit value required, the staff can operate the clamping mechanism in time to loosen the clamping of the spray gun barrel, reduce the load of the lifting mechanism, and avoid damage to the lifting mechanism. However, the fluctuation of the matte grade in daily production and the start-up and shutdown period are easy to cause the loss of the blow pipe. The original blow pipe is made of 316L stainless steel. Since the blow pipe needs to be immersed in the molten pool for blowing under the blowing state, it is found that the arsenic element in the blow pipe of 316L stainless steel will be enriched in the liquid copper melt, resulting in the surface austenite crystals being difficult to be oxidized. A thicker liquid porridge-like oxide is formed between the arsenic and copper enriched layer and the steel matrix, and at the grain boundary of the enriched layer, which reduces the strength of the steel surface and aggravates the formation of hot brittleness. As a result, the life of the blow pipe is too short, the loss is too large, and the consumption of manpower and material resources increases. Utility Model Content

[0004] The utility model aims to solve the above problems, and thus provides an abrasion-resistant structure for the lance of Ausmelt top-blown furnace to enhance the service life of the water spray pipe.

[0005] The technical solution adopted by the utility model to solve the above problems is as follows:

[0006] An abrasion-resistant structure for the lance of Ausmelt top-blown furnace includes an inverted L-shaped fixed platform. A fixed pipe is arranged at the outer end of the horizontal section of the fixed platform. A sliding pipe is slidably sealed inside the bottom end of the fixed pipe. A rotary joint is connected to the bottom of the sliding pipe. The rotary section at the lower part of the rotary joint is connected to the lance spray pipe. A rotary drive mechanism for driving the rotary section of the rotary joint to rotate is sleeved on the outer periphery of the rotary joint. The top of the rotary drive mechanism is fixed to the sliding pipe. A hoisting mechanism connected to the rotary drive mechanism is arranged at the top of the fixed platform. The lance spray pipe is coated with an alloy steel pipe on the outside.

[0007] The utility model adopting the above technical solution, compared with the prior art, has the prominent characteristics as follows:

[0008] Using a No. 3 alloy steel pipe to coat the outside of the lance spray pipe increases the abrasion resistance of the overall spray pipe structure and the corrosion resistance of the molten metal copper, reduces the reaction time and speed of the thermal brittleness phenomenon, improves the service life of the spray pipe, reduces the average daily consumption, and reduces the number and time of frequently replacing and connecting the spray pipe. Thus, the stability and continuity of the smelting production are ensured. The loss and waste of manpower and material resources are greatly reduced. The production cost is significantly reduced.

[0009] As a preference, a further technical solution of the utility model is as follows:

[0010] The lance spray pipe includes several connecting rods connected by threads, and the threads on the connecting rods are trapezoidal threads.

[0011] A slide rail is arranged on one side of the vertical section of the fixed platform. A slide block that is clamped and slidably connected to the slide rail is arranged on one side of the rotary drive mechanism. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of an embodiment of the utility model;

[0013] The marks in the figure are: fixed platform 1, fixed pipe 2, sliding pipe 3, rotary joint 4, lance spray pipe 5, reduction motor 6, hoist 7, alloy steel pipe 8, slide rail 9, slide block 10, housing 11. Detailed Embodiment

[0014] The following further illustrates the utility model with reference to embodiments. The purpose is only to better understand the content of the utility model. Therefore, the examples given do not limit the protection scope of the utility model.

[0015] An abrasion-resistant structure of an Ausmelt top-blown furnace lance, comprising an inverted L-shaped fixed platform 1. The outer end of the horizontal section of the fixed platform 1 is provided with a fixed pipe 2. A sliding pipe 3 is slidably sealed inside the bottom end of the fixed pipe 2. The bottom of the sliding pipe 3 is butted with a rotary joint 4. The upper part of the rotary joint 4 is a fixed section, and the rotary section of the lower part of the rotary joint 4 is butted with a lance nozzle 5. An outer periphery of the rotary joint 4 is sleeved with a rotary drive mechanism for driving the rotary section of the rotary joint 4 to rotate. The rotary drive mechanism includes a housing 11 fixed to the sliding pipe 3. One side of the top of the housing 11 is provided with a reduction motor 6. An output end of the reduction motor 6 extends into the housing 11 and is connected with a gear. A toothed ring meshing with the gear is arranged on the rotary section of the rotary joint 4. The reduction motor 6 drives the rotary section of the rotary joint 4 to rotate. The rotary section of the rotary joint 4 movably penetrates through the bottom surface of the housing 11 and is connected with the lance nozzle 5. The top of the rotary drive mechanism and the sliding pipe 3 are fixed by a connecting flange. A hoisting mechanism connected to the rotary drive mechanism is arranged on the top of the fixed platform 1. The hoisting mechanism includes a hoist 7 fixed to the top of the fixed platform 1 and a pulley fixed to the top end of the fixed platform 1. A steel wire rope of the hoist 7 bypasses the pulley and is connected with the top of the housing 11. The hoisting mechanism drives the lance nozzle 5 to move up and down to adjust the position of the lance nozzle 5, ensuring both the depth of injection and avoiding stirring the bottom of the molten bath. The outside of the lance nozzle 5 is coated with an alloy steel pipe 8, and the alloy steel pipe 8 is made of No. 3 alloy steel.

[0016] The lance nozzle 5 includes a plurality of connecting rods connected by threads. The threads on the connecting rods are trapezoidal threads, which prevent the lance nozzle 5 from loosening during rotation and avoid the occurrence of pipe dropping.

[0017] One side of the vertical section of the fixed platform 1 is provided with a slide rail 9. One side of the rotary drive mechanism is provided with a slider 10 that is snap-connected and slidably connected to the slide rail 9. The slider 10 is fixed to one side of the housing 11. Due to the eccentric rotation caused by slag hanging, the lifting and lowering actions are not smooth. The slide rail 9 enables the lance nozzle 5 not to shift due to the axial force caused by different slag hanging thicknesses during the lifting and lowering processes, improving the service efficiency of the lance nozzle 5.

[0018] Using a No. 3 alloy steel pipe to coat the outside of the lance nozzle increases the abrasion resistance of the overall nozzle structure and the corrosion resistance of the molten copper metal, reduces the reaction time and speed of the thermal brittleness phenomenon, improves the service life of the nozzle, reduces the average daily consumption, and reduces the number and time of frequently replacing and connecting the lance pipes. Thereby ensuring the stability and continuity of the smelting production. Greatly reducing the loss and waste of manpower and material resources. The production cost is significantly reduced.

[0019] The above are only the preferred and feasible embodiments of the present invention, and do not limit the scope of rights of the present invention. Any equivalent changes made by using the content of the specification and drawings of the present invention are included in the scope of rights of the present invention.

Claims

1. An Ausmelt top-blown furnace spray gun wear-resistant structure, comprising an inverted L-shaped fixed platform, a fixed tube is arranged at the outer end of the horizontal section of the fixed platform, a sliding tube is slidably sealed in the bottom end of the fixed tube, a rotary joint is butted at the bottom of the sliding tube, a rotating section at the lower part of the rotary joint is butted with a spray gun nozzle, a rotary drive mechanism for driving the rotating section of the rotary joint to rotate is sleeved on the outer periphery of the rotary joint, the top of the rotary drive mechanism is fixed to the sliding tube, and a winch mechanism connected to the rotary drive mechanism is arranged on the top of the fixed platform, characterized in that: The outside of the spray gun nozzle is covered with an alloy steel pipe.

2. The wear-resistant structure of the spray gun of the Ausmelt top-blown furnace according to claim 1 is characterized in that: The spray gun nozzle comprises a plurality of connecting rods connected by threads, and the threads on the connecting rods are trapezoidal threads.

3. The wear-resistant structure of the spray gun of the Ausmelt top-blown furnace according to claim 1 is characterized in that: A slide rail is arranged on one side of the vertical section of the fixed platform, and a sliding block which is clamped and slidably connected with the slide rail is arranged on one side of the rotary drive mechanism.

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