Laterite-nickel ore sulfur powder or particle injection device and process method

Abstract

The invention discloses a laterite-nickel ore sulfur powder or particle injection device and process method.The laterite-nickel ore sulfur powder or particle injection device comprises an outer shell, the top of the outer shell is connected with a vertical rotary feeder in a penetrating mode, the top of the vertical rotary feeder communicates with a storage tank, and the top of the storage tank communicates with an injection pipe; the bottom of an inner cavity of the outer shell is connected with a blowing tank through bolts, a smelting furnace is connected into the blowing tank in a sleeved mode, a plurality of evenly-distributed discharging holes are formed in the bottom of a vertical rotary feeder, and the bottom of the vertical rotary feeder is connected with a feeding pump matched with the discharging holes through bolts. The continuous and stable precise injection can be realized, the blockage and the cutoff are avoided, and the influence caused by the material property and the fluctuation of the pressure in the furnace is avoided. The blowing output can be adjusted and controlled through a variable frequency motor according to the process requirement, and the functions of instantaneous flow display and accumulated flow display are achieved; the injection precision is high; the automation degree is high, and operation and control are carried out through pictures of an upper computer.

Description

Technical Field

[0001] The invention relates to the technical field of laterite nickel ore sulfur powder or particle blowing, and in particular to a laterite nickel ore sulfur powder or particle blowing device and a process method. Background Art

[0002] The oxygen-enriched pulverized coal side-blowing reduction technology for laterite nickel ore is a promotion of the side-blowing submerged combustion molten pool smelting technology in the field of laterite nickel ore smelting. The violent bubbling of the molten pool and the tumbling of the liquid slag produce a huge reaction interface. The iron and nickel oxides are heated, melted, reduced and sulfided. The reduced nickel matte droplets settle and separate and enter the static slag layer below the nozzle. Under the action of gravity, the slag and matte begin to separate. As a result, a slag layer that is basically nickel-free is formed on the upper part of the furnace, and the nickel matte is deposited at the bottom of the furnace, and the ingot is discharged from the nickel matte discharge port. The gangue (SiO 2 、MgO、Al 2 O 3 , CaO, etc.) are melted to generate liquid slag with good performance, which is discharged from the slag discharge port.

[0003] At present, smelting furnaces use natural gas, coke oven gas and coal gas as fuels. However, in areas where gas is scarce, it is not economical to use gas as smelting fuel, which limits the applicability of side-blowing smelting combustion technology. When coal is used as fuel, granular coal is added from the top of the smelting furnace, and the granular coal falls into the melt by gravity, which results in incomplete combustion of the granular coal, low utilization efficiency and high production cost. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a laterite nickel ore sulfur powder or particle blowing device and a process method. The present invention adopts a series of tank quantitative rotary feeding type, and the series of tank quantitative rotary feeding device is composed of a storage tank, a blowing tank, a vertical rotary feeder and other main components. Each coal powder blowing device is provided with 1-6 outlets at the bottom, and each outlet corresponds to an independent blowing pipeline to the spray gun inlet of the smelting furnace.

[0005] To achieve the above-mentioned purpose, a laterite nickel ore sulfur powder or particle blowing device is provided, comprising: an outer shell, a vertical rotary feeder is connected through the top of the outer shell, the top of the vertical rotary feeder is connected to a storage tank, and the top of the storage tank is connected to a filling pipe, the bottom of the inner cavity of the outer shell is connected to a blowing tank by bolts, and a smelting furnace is sleeved in the blowing tank, a plurality of evenly distributed discharge holes are opened at the bottom of the vertical rotary feeder, and a feeding pump matching the discharge holes is connected to the bottom of the vertical rotary feeder by bolts, the feed port of the feeding pump is inserted in the discharge hole, the discharge port of the feeding pump is sleeved with a blowing pipe, the right end of the blowing pipe is connected to a spray gun, and the end of the spray gun away from the blowing pipe penetrates the outer wall of the blowing tank and the smelting furnace, and extends into the smelting furnace.

[0006] A rotating shaft is movably connected between the left and right inner walls of the storage tank via a bearing, and a number of evenly distributed baffle plates are installed on the rotating shaft. A driving motor is connected to the right outer wall of the storage tank near the bottom via bolts, and the right end of the rotating shaft passes through the inner ring of the bearing and is connected to the output shaft of the driving motor.

[0007] The bottom of the vertical rotary feeder is connected to a cover body by bolts, and the bottom of the cover body is connected to the top of the spray tank by bolts, and the top of the cover body is open. The top of the inner cavity of the vertical rotary feeder is movably connected to a rotating plate by a rotating shaft and a bearing, and a material guide port is opened at the top of the rotating plate near the right side, and a dual-axis motor is connected to the cover body by bolts, and the bottom end of the rotating shaft on the bottom of the rotating plate passes through the inner ring of the bearing and is connected to the output shaft at the top of the dual-axis motor.

[0008] A groove is provided on the rotating plate, a rotating motor is connected in the groove by bolts, a material stripping plate is movably connected to the top of the rotating plate by a rotating shaft and a bearing, and the bottom end of the rotating shaft on the bottom of the material stripping plate passes through the inner ring of the bearing and is connected to the output shaft of the rotating motor.

[0009] The bottom of the cover body is movably connected to a rotating rod through a bearing, and the top of the rotating rod passes through the inner ring of the bearing and is connected to the output shaft at the bottom of the dual-axis motor. The outer wall of the rotating rod is connected to a plurality of evenly distributed L-shaped stirring rods through bolts.

[0010] A discharge pipe is connected to the right side of the smelting furnace near the bottom, and a valve is installed on the smelting furnace. The right end of the discharge pipe passes through the smelting furnace, the blowing tank and the outer shell in sequence, and extends to the outside of the outer shell.

[0011] A method for spraying sulfur powder or particles of laterite nickel ore, comprising the following steps: S1: First, coke, bituminous coal, anthracite, biomass carbon and other block or granular forms are pulverized by a coal pulverizer, and a fixed reducing agent is added (to increase the surface area for full combustion); S2: The pulverized coal is then introduced into the pulverized coal storage bin through a pulverized coal mixing scraper, and the pulverized coal is fluidized (forming a solid-gas fluid) and input into a delivery pump, which is monitored by an instrument (level switch / pressure transmitter), and uses a gas distribution component (top pressurization, cone fluidization, tail purge), and is controlled locally (inlet valve, outlet valve, exhaust valve, instrument, etc.); S3: The conveying pump introduces the material into the storage bin in front of the smelting furnace and fluidizes the pulverized coal (forming a solid-gas fluid) and introduces it into the quantitative rotary feed pump; S4: the quantitative rotary feed pump introduces the material into the smelting furnace spray gun, the smelting furnace spray gun introduces the material into the laterite nickel ore powder smelting furnace, and introduces the dried laterite nickel ore, solvent and enriched oxygen into the laterite nickel ore powder smelting furnace; S5: The laterite nickel ore powder smelting furnace then discharges the flue gas, and the flue gas is treated and discharged; S6: Finally, the laterite nickel ore powder smelting furnace discharges slag and crude nickel alloy.

[0012] In the S2 step, the CO / O 2 / temperature / material level), and is protected by a nitrogen protection device (to prevent explosion). The coal powder pneumatic conveying pump has a starting speed of 3-6 m / s and a terminal speed of 10-12 m / s.

[0013] In the S3 step, the CO / O 2 / temperature / material level), and is protected by a nitrogen protection device (to prevent explosion). The quantitative rotary feeding pump is monitored by instruments (material level switch / pressure transmitter), and uses gas distribution components (top pressurization, cone fluidization, tail purge), and is controlled locally (inlet valve, outlet valve, exhaust valve, instrument, etc.), and the feeder speed is monitored (continuous, uniform, and stable). The quantitative rotary feeding pump uses pneumatic conveying of coal powder / starting speed is 3-6m / s, and the terminal speed is 10-12 m / s.

[0014] The above solution has at least one of the following beneficial effects: 1. The present invention adopts a series of tank quantitative rotary feeding type. The series of tank quantitative rotary feeding device is composed of a storage tank, a spray tank, a vertical rotary feeder and other main components. Each coal powder spraying device is provided with 1-6 outlets at the bottom, and each outlet corresponds to an independent spraying pipeline to the spray gun inlet of the smelting furnace. The feeder adopts a multi-outlet feeder. The system matches the corresponding number of series tank rotary feeding pumps according to the number of furnace nozzles. Each spray gun can be used or not according to the process requirements. At the same time, the blockage or failure of a spray gun will not affect the entire system. 2. The present invention can realize continuous, stable and precise spraying without blockage or interruption, and will not be affected by fluctuations in material properties and pressure in the furnace. The spraying output can be adjusted and controlled by a variable frequency motor according to process requirements, and has instantaneous flow display and cumulative flow display functions; the spraying precision is high; the degree of automation is high, and operation and control are performed through the upper computer screen.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments; Figure 1 It is a main perspective view of the present invention; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure; Figure 3 for Figure 2 A in the enlarged view; Figure 4 for Figure 1 Partial stereogram of the middle storage tank, spray tank and other components; Figure 5 for Figure 1 Partial top view of the spray gun and smelting furnace; Figure 6 It is a flow chart of the present invention.

[0017] Legend: 1. Outer shell; 2. Vertical rotary feeder; 3. Storage tank; 4. Injection pipe; 5. Drive motor; 6. Discharge pipe; 7. Valve; 8. Spray tank; 9. Cover; 10. Melting furnace; 11. Spray gun; 12. Discharge hole; 13. Diverter plate; 14. Rotating plate; 15. Guide port; 16. Feed pump; 17. Spray pipe; 18. L-shaped stirring rod; 19. Rotating rod; 20. Rotating shaft; 21. Baffle plate; 22. Groove; 23. Rotating motor; 24. Double-axis motor. DETAILED DESCRIPTION

[0018] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0019] Embodiment 1 Reference Figures 1 to 5The embodiment of the present invention is a laterite nickel ore sulfur powder or particle blowing device, which includes an outer shell 1, the top of the outer shell 1 is connected with a vertical rotary feeder 2, the top of the vertical rotary feeder 2 is connected with a storage tank 3, and the top of the storage tank 3 is connected with a filling pipe 4, the bottom of the inner cavity of the outer shell 1 is connected with a blowing tank 8 by bolts, and the blowing tank 8 is sleeved with a smelting furnace 10, the bottom of the vertical rotary feeder 2 is provided with a plurality of evenly distributed discharge holes 12, and the bottom of the vertical rotary feeder 2 is connected with a matching discharge hole 12 by bolts. A feeding pump 16 is provided, the feeding port of the feeding pump 16 is inserted into the discharge hole 12, the discharge port of the feeding pump 16 is sleeved with a blowing pipe 17, the right end of the blowing pipe 17 is connected with a spray gun 11, the end of the spray gun 11 away from the blowing pipe 17 penetrates the outer wall of the blowing tank 8 and the smelting furnace 10, and extends into the smelting furnace 10, the right side of the smelting furnace 10 near the bottom is connected with a discharge pipe 6, and a valve 7 is installed on the smelting furnace 10, the right end of the discharge pipe 6 penetrates the smelting furnace 10, the blowing tank 8 and the outer shell 1 in sequence, and extends to the outside of the outer shell 1.

[0020] A groove 22 is provided on the rotating plate 14, and a rotating motor 23 is connected to the groove 22 by bolts. The top of the rotating plate 14 is movably connected to the material-pickup plate 13 through a rotating shaft and a bearing, and the bottom end of the rotating shaft on the bottom of the material-pickup plate 13 passes through the inner ring of the bearing and is connected to the output shaft of the rotating motor 23. The bottom of the cover body 9 is movably connected to a rotating rod 19 through a bearing, and the top end of the rotating rod 19 passes through the inner ring of the bearing and is connected to the output shaft at the bottom of the dual-axis motor 24. A number of evenly distributed L-shaped stirring rods 18 are connected to the outer wall of the rotating rod 19 by bolts.

[0021] The left and right inner walls of the storage tank 3 are movably connected with a rotating shaft 20 through a bearing, and a number of evenly distributed baffle plates 21 are installed on the rotating shaft 20. The right outer wall of the storage tank 3 is connected to the drive motor 5 by bolts near the bottom, and the right end of the rotating shaft 20 passes through the inner ring of the bearing and is connected to the output shaft of the drive motor 5. Through this structure, a series of tank quantitative rotary feeding type is adopted. The series tank quantitative rotary feeding device is composed of main components such as a storage tank 3, a spray tank 8, and a vertical rotary feeder 2. Each coal powder spraying device is provided with 1-6 outlets at the bottom, and each outlet corresponds to an independent spraying pipeline 17 to the inlet of the spray gun 11 of the smelting furnace 10. The feeder adopts a multi-outlet feeder. The system matches the corresponding number of series tank rotary feeding pumps 16 according to the number of furnace nozzles. Each spray gun 11 can be selected to be used or not according to the process requirements. At the same time, the blockage or fault maintenance of a spray gun 11 does not affect the entire system.

[0022] The bottom of the vertical rotary feeder 2 is connected to a cover body 9 by bolts, and the bottom of the cover body 9 is connected to the top of the spray tank 8 by bolts, and the top of the cover body 9 is set to be open. The top of the inner cavity of the vertical rotary feeder 2 is movably connected to a rotating plate 14 through a rotating shaft and a bearing, and a material guide port 15 is opened near the right side of the top of the rotating plate 14. A double-axis motor 24 is connected to the cover body 9 by bolts, and the bottom end of the rotating shaft on the bottom of the rotating plate 14 passes through the inner ring of the bearing and is connected to the output shaft at the top of the double-axis motor 24. Through this structure, continuous, stable and precise spraying can be achieved without blockage or interruption, and will not be affected by fluctuations in material properties and pressure in the furnace. The spraying output can be adjusted and controlled by a variable frequency motor according to process requirements, with instantaneous flow display and cumulative flow display functions; high spraying accuracy; high degree of automation, and operation and control through the upper computer screen.

[0023] A method for spraying sulfur powder or particles of laterite nickel ore, comprising the following steps: S1: First, coke, bituminous coal, anthracite, biomass carbon and other block or granular forms are pulverized by a coal pulverizer, and a fixed reducing agent is added (to increase the surface area for full combustion); S2: The pulverized coal is then introduced into the pulverized coal storage bin through a pulverized coal mixing scraper, and the pulverized coal is fluidized (forming a solid-gas fluid) and input into a delivery pump, which is monitored by an instrument (level switch / pressure transmitter), and uses a gas distribution component (top pressurization, cone fluidization, tail purge), and is controlled locally (inlet valve, outlet valve, exhaust valve, instrument, etc.); S3: The conveying pump introduces the material into the storage bin in front of the smelting furnace and fluidizes the pulverized coal (forming a solid-gas fluid) and introduces it into the quantitative rotary feed pump; S4: the quantitative rotary feed pump introduces the material into the smelting furnace spray gun, the smelting furnace spray gun introduces the material into the laterite nickel ore powder smelting furnace, and introduces the dried laterite nickel ore, solvent and enriched oxygen into the laterite nickel ore powder smelting furnace; S5: The laterite nickel ore powder smelting furnace then discharges the flue gas, and the flue gas is treated and discharged; S6: Finally, the laterite nickel ore powder smelting furnace discharges slag and crude nickel alloy.

[0024] In the step S2 of this embodiment, the CO / O 2 / temperature / material level), and is protected by a nitrogen protection device (to prevent explosion). The coal powder pneumatic conveying pump has a starting speed of 3-6 m / s and a terminal speed of 10-12 m / s.

[0025] In the step S3 of this embodiment, the CO / O 2 / temperature / material level), and is protected by a nitrogen protection device (to prevent explosion). The quantitative rotary feeding pump is monitored by instruments (material level switch / pressure transmitter), and uses gas distribution components (top pressurization, cone fluidization, tail purge), and is controlled locally (inlet valve, outlet valve, exhaust valve, instrument, etc.), and the feeder speed is monitored (continuous, uniform, and stable). The quantitative rotary feeding pump uses pneumatic conveying of coal powder / starting speed is 3-6m / s, and the terminal speed is 10-12 m / s.

[0026] The present invention adopts a side-blowing pulverized coal spray gun to spray pulverized coal directly into the molten pool. Part of the pulverized coal burns and releases heat to supplement the heat of the metallurgical process. At the same time, the pulverized coal also explodes in the furnace as a reducing agent to produce countless fine carbon-containing particles, which greatly improves and enhances the metallurgical interface reaction conditions of the reduction smelting process and strengthens the smelting process. At the same time, the pulverized coal is sprayed into the melt. Since it is wrapped by the melt foam layer, the volatile components can be used for efficient reaction and utilization.

[0027] This embodiment uses a wear-resistant ceramic liner, which effectively extends the life of the spray gun. The online removable dual-channel pulverized coal spray gun is used to completely solve the problem of online maintenance and replacement of the pulverized coal spray gun. The pulverized coal spray gun and the oxygen-enriched air nozzle are arranged at intervals, which can effectively reduce the scouring of the spray gun on the opposite side wall, and the spray gun flow rate and working pressure are reasonable.

[0028] Compared with other fuels such as natural gas, coal gas, heavy diesel, etc., pulverized coal has a lower price and can be used as a fuel and a reducing agent at the same time. It is particularly suitable for use as a fuel and a reducing agent under molten pool smelting conditions.

[0029] The present embodiment adopts oxygen-enriched side-blown coal powder for melting reduction of laterite nickel ore, which only needs preliminary drying to contain 10% physical water (or deep steam drying to contain 0.3% physical water) before being directly added into the furnace for melting reduction smelting, thus eliminating the traditional sintering, pre-reduction and other processes.

[0030] The oxygen concentration is high and the heat utilization rate is high. Flue gas is the main factor of heat loss in the smelting process. Under normal circumstances, flue gas can take away 50-60% of the waste heat. In the side-blowing process, oxygen-enriched air and pulverized coal can be sprayed, and the oxygen-enriched concentration can reach 70-90%. The amount of smelting waste gas is small, and the heat loss of flue gas is small.

[0031] This embodiment: the reducing agent has strong adaptability. It does not need to use coke or coking coal, and a wide range of coal types can be used, which is conducive to reducing costs.

[0032] This embodiment: low investment, can save huge investment in coal-fired power plants. Differences from the RKEF-high nickel matte process route: The overall process of oxygen-enriched pulverized coal side-blowing reduction technology and the RKEF-high nickel matte technology route can omit one step of roasting-pre-reduction in the process; oxygen-enriched raw materials are more adaptable; the equipment is transformed from an electric furnace to a side-blowing furnace.

[0033] Working principle: When in use, the present technical solution first places the outer shell 1 at the desired position, then injects the material into the storage tank 3 through the injection pipe 4, and then drives the motor 5 to drive the rotating shaft 20 and the baffle plate 21 to rotate slowly, so that the baffle plate 21 pushes the material to fall into the vertical rotary feeder 2, which can realize intermittent feeding and prevent blockage caused by too fast feeding. Then the rotating motor 23 drives the material plate 13 to rotate and pushes the material into the guide port 15, and the top output shaft of the double-axis motor 24 drives the rotating plate 14 to rotate, so that the guide port 15 can be sequentially introduced into a plurality of discharge holes 12, and a plurality of feeding pumps 16 can sequentially introduce the material into a plurality of spray guns 11 through the spray pipe 17, and the spray gun 11 sprays the material into the smelting furnace 1 0, and at the same time, the bottom output shaft of the dual-axis motor 24 drives the rotating rod 19 and the L-shaped stirring rod 18 to rotate, so as to stir the material and the melt, so that the material and the melt can be fully in contact. The present invention adopts a series of tank quantitative rotary feeding type, and the series of tank quantitative rotary feeding device is composed of a storage tank 3, a spray tank 8, a vertical rotary feeder 2 and other main components. Each coal powder spraying device is provided with 1-6 outlets at the bottom, and each outlet corresponds to an independent spraying pipeline 17 to the inlet of the spray gun 11 of the smelting furnace 10. The feeder adopts a multi-outlet feeder. The system matches the corresponding number of series tank rotary feeding pumps 16 according to the number of furnace nozzles. Each spray gun 11 can be used or not according to the process requirements. At the same time, the blockage or failure maintenance of a certain spray gun 11 has no effect on the entire system.

[0034] Embodiment 2 Reference Figures 1 to 6 The embodiment of the present invention is a laterite nickel ore sulfur powder or particle blowing device, which includes an outer shell 1, the top of the outer shell 1 is connected with a vertical rotary feeder 2, the top of the vertical rotary feeder 2 is connected with a storage tank 3, and the top of the storage tank 3 is connected with a filling pipe 4, the bottom of the inner cavity of the outer shell 1 is connected with a blowing tank 8 by bolts, and the blowing tank 8 is sleeved with a smelting furnace 10, the bottom of the vertical rotary feeder 2 is provided with a plurality of evenly distributed discharge holes 12, and the bottom of the vertical rotary feeder 2 is connected with a matching discharge hole 12 by bolts. A feeding pump 16 is provided, the feeding port of the feeding pump 16 is inserted into the discharge hole 12, the discharge port of the feeding pump 16 is sleeved with a blowing pipe 17, the right end of the blowing pipe 17 is connected with a spray gun 11, the end of the spray gun 11 away from the blowing pipe 17 penetrates the outer wall of the blowing tank 8 and the smelting furnace 10, and extends into the smelting furnace 10, the right side of the smelting furnace 10 near the bottom is connected with a discharge pipe 6, and a valve 7 is installed on the smelting furnace 10, the right end of the discharge pipe 6 penetrates the smelting furnace 10, the blowing tank 8 and the outer shell 1 in sequence, and extends to the outside of the outer shell 1.

[0035] A groove 22 is provided on the rotating plate 14, and a rotating motor 23 is connected to the groove 22 by bolts. The top of the rotating plate 14 is movably connected to the material-pickup plate 13 through a rotating shaft and a bearing, and the bottom end of the rotating shaft on the bottom of the material-pickup plate 13 passes through the inner ring of the bearing and is connected to the output shaft of the rotating motor 23. The bottom of the cover body 9 is movably connected to a rotating rod 19 through a bearing, and the top end of the rotating rod 19 passes through the inner ring of the bearing and is connected to the output shaft at the bottom of the dual-axis motor 24. A number of evenly distributed L-shaped stirring rods 18 are connected to the outer wall of the rotating rod 19 by bolts.

[0036] The left and right inner walls of the storage tank 3 are movably connected with a rotating shaft 20 through a bearing, and a number of evenly distributed baffle plates 21 are installed on the rotating shaft 20. The right outer wall of the storage tank 3 is connected to the drive motor 5 by bolts near the bottom, and the right end of the rotating shaft 20 passes through the inner ring of the bearing and is connected to the output shaft of the drive motor 5. Through this structure, a series of tank quantitative rotary feeding type is adopted. The series tank quantitative rotary feeding device is composed of main components such as a storage tank 3, a spray tank 8, and a vertical rotary feeder 2. Each coal powder spraying device is provided with 1-6 outlets at the bottom, and each outlet corresponds to an independent spraying pipeline 17 to the inlet of the spray gun 11 of the smelting furnace 10. The feeder adopts a multi-outlet feeder. The system matches the corresponding number of series tank rotary feeding pumps 16 according to the number of furnace nozzles. Each spray gun 11 can be selected to be used or not according to the process requirements. At the same time, the blockage or fault maintenance of a spray gun 11 does not affect the entire system.

[0037] The bottom of the vertical rotary feeder 2 is connected to a cover body 9 by bolts, and the bottom of the cover body 9 is connected to the top of the spray tank 8 by bolts, and the top of the cover body 9 is set to be open. The top of the inner cavity of the vertical rotary feeder 2 is movably connected to a rotating plate 14 through a rotating shaft and a bearing, and a material guide port 15 is opened near the right side of the top of the rotating plate 14. A double-axis motor 24 is connected to the cover body 9 by bolts, and the bottom end of the rotating shaft on the bottom of the rotating plate 14 passes through the inner ring of the bearing and is connected to the output shaft at the top of the double-axis motor 24. Through this structure, continuous, stable and precise spraying can be achieved without blockage or interruption, and will not be affected by fluctuations in material properties and pressure in the furnace. The spraying output can be adjusted and controlled by a variable frequency motor according to process requirements, with instantaneous flow display and cumulative flow display functions; high spraying accuracy; high degree of automation, and operation and control through the upper computer screen.

[0038] A method for spraying sulfur powder or particles of laterite nickel ore, comprising the following steps: S1: First, coke, bituminous coal, anthracite, biomass carbon and other block or granular forms are pulverized by a coal pulverizer, and a fixed reducing agent is added (to increase the surface area for full combustion); S2: The pulverized coal is then introduced into the pulverized coal storage bin through a pulverized coal mixing scraper, and the pulverized coal is fluidized (forming a solid-gas fluid) and input into a delivery pump, which is monitored by an instrument (level switch / pressure transmitter), and uses a gas distribution component (top pressurization, cone fluidization, tail purge), and is controlled locally (inlet valve, outlet valve, exhaust valve, instrument, etc.); S3: The conveying pump introduces the material into the storage bin in front of the smelting furnace and fluidizes the pulverized coal (forming a solid-gas fluid) and introduces it into the quantitative rotary feed pump; S4: the quantitative rotary feed pump introduces the material into the smelting furnace spray gun, the smelting furnace spray gun introduces the material into the laterite nickel ore powder smelting furnace, and introduces the dried laterite nickel ore, solvent and enriched oxygen into the laterite nickel ore powder smelting furnace; S5: The laterite nickel ore powder smelting furnace then discharges the flue gas, and the flue gas is treated and discharged; S6: Finally, the laterite nickel ore powder smelting furnace discharges slag and crude nickel alloy.

[0039] In the step S2 of this embodiment, the CO / O 2 / temperature / material level), and is protected by a nitrogen protection device (to prevent explosion). The coal powder pneumatic conveying pump has a starting speed of 3-6 m / s and a terminal speed of 10-12 m / s.

[0040] In the step S3 of this embodiment, the CO / O 2 / temperature / material level), and is protected by a nitrogen protection device (to prevent explosion). The quantitative rotary feeding pump is monitored by instruments (material level switch / pressure transmitter), and uses gas distribution components (top pressurization, cone fluidization, tail purge), and is controlled locally (inlet valve, outlet valve, exhaust valve, instrument, etc.), and the feeder speed is monitored (continuous, uniform, and stable). The quantitative rotary feeding pump uses pneumatic conveying of coal powder / starting speed is 3-6m / s, and the terminal speed is 10-12 m / s.

[0041] In this embodiment, sulfur is easy to clump and harden, and is not easy to flow, which easily causes poor material flow and blocks the pipeline. Therefore, the present invention is made by mixing the following raw materials in weight proportions: Scheme 1, sulfur powder + coal powder; Scheme 2, sulfur granules + coal powder granules.

[0042] The feeding method of the present invention is changed from adding materials from the top of the smelting furnace to inserting a spray gun from the side or bottom of the smelting furnace. The spray gun 11 is located below the liquid level of the smelting melt, so that the sulfur and the melt can quickly merge and fully react, which greatly improves the utilization rate of sulfur and reduces the difficulty of smelting.

[0043] In this embodiment, the sulfur blowing device adopts a series of tank quantitative rotary feeding type, which is composed of a storage tank 3, a blowing tank 8, a vertical rotary feeder 2 and other main components. Each sulfur blowing device is provided with 1-6 outlets at the bottom, and each outlet corresponds to an independent blowing pipeline 17 to the inlet of the spray gun 11 of the smelting furnace 10.

[0044] The feeder of the present invention adopts a multi-outlet feeder. The system matches the corresponding number of serial injection rotary feed pumps 16 according to the number of furnace nozzles. Each spray gun 11 can be used or not according to process requirements. At the same time, the blockage or failure maintenance of a spray gun 11 will not affect the entire system.

[0045] This embodiment can achieve continuous, stable and accurate spraying without blockage or interruption, and will not be affected by fluctuations in material properties and pressure in the furnace. The spraying output can be adjusted and controlled by a variable frequency motor according to process requirements, with instantaneous flow display and cumulative flow display functions; high spraying accuracy; high degree of automation, and operation and control through the upper computer screen.

[0046] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A laterite nickel ore sulfur powder or particle blowing device, characterized in that: include: An outer shell (1), the top of the outer shell (1) is connected to a vertical rotary feeder (2), the top of the vertical rotary feeder (2) is connected to a storage tank (3), and the top of the storage tank (3) is connected to a material injection pipe (4), the bottom of the inner cavity of the outer shell (1) is connected to a spray tank (8) by bolts, and a smelting furnace (10) is sleeved in the spray tank (8), and the bottom of the vertical rotary feeder (2) is provided with a plurality of evenly distributed discharge holes (12), and the A feed pump (16) matching the discharge hole (12) is connected to the bottom of the vertical rotary feeder (2) by bolts, the feed port of the feed pump (16) is inserted into the discharge hole (12), the discharge port of the feed pump (16) is sleeved with a spray pipe (17), the right end of the spray pipe (17) is connected to a spray gun (11), and the end of the spray gun (11) away from the spray pipe (17) penetrates the outer wall of the spray tank (8) and the smelting furnace (10), and extends into the smelting furnace (10).

2. A laterite nickel ore sulfur powder or particle blowing device according to claim 1, characterized in that: A rotating shaft (20) is movably connected between the left and right inner walls of the storage tank (3) via a bearing, and a plurality of evenly distributed baffle plates (21) are mounted on the rotating shaft (20). A drive motor (5) is connected to the right outer wall of the storage tank (3) near the bottom via bolts, and the right end of the rotating shaft (20) passes through the inner ring of the bearing and is connected to the output shaft of the drive motor (5).

3. The laterite nickel ore sulfur powder or particle blowing device according to claim 1, characterized in that: The bottom of the vertical rotary feeder (2) is connected to a cover body (9) by bolts, and the bottom of the cover body (9) is connected to the top of the spray tank (8) by bolts, and the top of the cover body (9) is open. The top of the inner cavity of the vertical rotary feeder (2) is movably connected to a rotating plate (14) by a rotating shaft and a bearing, and a material guide port (15) is provided at the top of the rotating plate (14) near the right side. A dual-axis motor (24) is connected to the inside of the cover body (9) by bolts, and the bottom end of the rotating shaft on the bottom of the rotating plate (14) passes through the inner ring of the bearing and is connected to the output shaft at the top of the dual-axis motor (24).

4. A laterite nickel ore sulfur powder or particle blowing device according to claim 3, characterized in that: The rotating plate (14) is provided with a groove (22), a rotating motor (23) is connected to the groove (22) via bolts, the top of the rotating plate (14) is movably connected to the material shifting plate (13) via a rotating shaft and a bearing, and the bottom end of the rotating shaft on the bottom of the material shifting plate (13) passes through the inner ring of the bearing and is connected to the output shaft of the rotating motor (23).

5. The laterite nickel ore sulfur powder or particle blowing device according to claim 3 is characterized in that: The bottom of the cover body (9) is movably connected to a rotating rod (19) via a bearing, and the top end of the rotating rod (19) passes through the inner ring of the bearing and is connected to the output shaft at the bottom of the dual-axis motor (24), and a plurality of evenly distributed L-shaped stirring rods (18) are connected to the outer wall of the rotating rod (19) via bolts.

6. The laterite nickel ore sulfur powder or particle blowing device according to claim 1, characterized in that: A discharge pipe (6) is connected to the right side of the smelting furnace (10) near the bottom, and a valve (7) is installed on the smelting furnace (10). The right end of the discharge pipe (6) passes through the smelting furnace (10), the blowing tank (8) and the outer shell (1) in sequence, and extends to the outside of the outer shell (1).

7. The method for spraying sulfur powder or particles of laterite nickel ore according to claim 1, characterized in that: The following steps are involved: S1: First, the lump or granular form of coke, bituminous coal, anthracite, or biomass carbon is pulverized by a coal pulverizer, and a fixed reducing agent is added; S2: The pulverized coal is then introduced into the pulverized coal storage bin through a pulverized coal mixing scraper, and the pulverized coal is fluidized and input into a delivery pump, which is monitored by an instrument and uses a gas distribution component and is controlled locally; S3: The conveying pump introduces the material into the storage bin in front of the smelting furnace and fluidizes the pulverized coal into the quantitative rotary feed pump; S4: the quantitative rotary feed pump introduces the material into the smelting furnace spray gun, the smelting furnace spray gun introduces the material into the laterite nickel ore powder smelting furnace, and introduces the dried laterite nickel ore, solvent and enriched oxygen into the laterite nickel ore powder smelting furnace; S5: The laterite nickel ore powder smelting furnace then discharges the flue gas, and the flue gas is treated and discharged; S6: Finally, the laterite nickel ore powder smelting furnace discharges slag and crude nickel alloy.

8. The method for spraying sulfur powder or particles of laterite nickel ore according to claim 7, characterized in that: In the step S2, the process is monitored by an instrument and protected by a nitrogen protection device. The coal powder is pneumatically conveyed by the conveying pump with an initial speed of 3-6 m / s and a terminal speed of 10-12 m / s.

9. The method for spraying sulfur powder or particles of laterite nickel ore according to claim 7, characterized in that: The S3 step is monitored by instruments and protected by a nitrogen protection device. The quantitative rotary feeding pump is monitored by instruments and uses a gas distribution component, and is controlled locally to monitor the feeder speed. The quantitative rotary feeding pump uses pneumatic conveying of coal powder / starting speed is 3-6 m / s and terminal speed is 10-12 m / s.

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