Device for smelting nickel matte from laterite-nickel ore

Abstract

The utility model discloses a device for smelting matte nickel from laterite-nickel ore. The problems that in the existing nickel matte preparation process, the sulfur utilization rate is low, environmental pollution is large, and the grade of nickel matte is unstable are solved. The system comprises a side-blown furnace which is divided into a melting zone and a vulcanization zone; the side-blown furnace comprises a first spray gun; the slag-nickel separation device is arranged at the rear end of the side-blown converter vulcanization area, is separated from the side-blown converter vulcanization area through a first partition wall and is communicated with the side-blown converter vulcanization area through a first channel, and the smelting slag and the matte nickel flow into the slag-nickel separation device together through the first channel below the first partition wall; the slag-nickel separation device comprises a second spray gun, the second spray gun continuously and quantitatively sprays pulverized coal and sulfur into a slag layer intermittently, and continuous reduction of nickel in smelting slag and separation of slag nickel are achieved. The device also has the advantages of simple structure, convenience in assembly, reliable action, high grade temperature of produced nickel matte, long service life, stable grade of produced nickel matte and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of smelting laterite nickel ore with a side-blown furnace, and in particular to a device for smelting nickel matte from laterite nickel ore. Background Art

[0002] The application and continuous development of ternary lithium battery materials provide a broader application scenario for nickel metal products, and also create new opportunities for the in-depth development of nickel-containing raw materials and the extension of downstream technologies. As an important source of raw materials for the production of nickel metal products, laterite nickel ore is currently mainly smelted and extracted from nickel and associated cobalt and other valuable metals by two methods: hydrometallurgy and pyrometallurgy. The products of hydrometallurgy are mainly nickel hydroxide and nickel sulfide, mainly nickel hydroxide; the products of pyrometallurgy are mainly nickel iron and high matte nickel, mainly nickel iron. Hydrometallurgy is dominated by high-pressure acid leaching technology, with sulfuric acid as the main auxiliary material. Due to the complex process operation conditions, high requirements for raw materials and production operations, very strict selection of equipment and materials, and extremely high requirements for process automation control, the project construction investment is high, the production cost is high, and it is very difficult to operate and reach production targets. In addition, the nickel hydroxide produced has a relatively low nickel grade and high water content, and the transportation cost and post-processing investment and cost are high. Pyrometallurgy generally adopts the RKEF (rotary kiln + electric furnace) process, which mainly produces nickel iron, and can also produce low matte nickel after adding sulfidation measures. The RKEF process requires the consumption of coke and a large amount of electricity. In the process of sulfiding it into low-grade nickel matte, there are problems such as low sulfur utilization, environmental pollution, and unstable nickel matte grade. In addition, the engineering construction investment and operating costs of this process are relatively high. Utility Model Content

[0003] In order to solve the problems of low sulfur utilization rate, severe environmental pollution and unstable nickel matte grade in the existing process of preparing nickel matte in the background technology, the utility model provides a device for smelting nickel matte from laterite nickel ore.

[0004] The technical solution of the utility model is: a device for smelting nickel matte from laterite nickel ore, comprising:

[0005] The side-blowing furnace is used to melt, pre-reduced and sulfided laterite nickel ore, quartz and sulfiding agent mixed in a certain proportion under the action of oxygen-enriched air and pulverized coal to form smelting slag and nickel matte; the side-blowing furnace is divided into a melting zone and a sulfiding zone; the side-blowing furnace includes a first spray gun;

[0006] The slag-nickel separation device is arranged at the rear end of the side-blown furnace sulfiding zone, separated from the side-blown furnace sulfiding zone by a first partition wall and connected with a first channel. The smelting slag and nickel matte flow into the slag-nickel separation device through the first channel below the first partition wall. The slag-nickel separation device includes a second spray gun, which continuously and quantitatively sprays pulverized coal and sulfur intermittently into the slag layer, further reducing and sulfiding the nickel oxides in the smelting slag while maintaining the insulation and clarification temperature, thereby achieving continuous reduction of nickel in the smelting slag and separation of slag nickel.

[0007] As a further improvement of the present utility model, the inner cavity cross-section of the side-blown furnace is a square structure when viewed from above, with a cross-sectional width of 2000mm-2400mm and a length of 18000-35000mm; the length of the melting zone is approximately 12000-24000mm, and the length of the vulcanization zone is 6000-12000mm; the left-view cross-section of the side-blown furnace is a structure that is narrow at the bottom and wide at the top.

[0008] As a further improvement of the utility model, the inner cavity of the slag-nickel separation device has a square structure in top view, the width of the cross section is consistent with the width of the cross section of the side-blown furnace, and the length is 3600-6000 mm.

[0009] As a further improvement of the utility model, the depth of the furnace cylinder of the melting zone in the side-blown furnace is 100-400 mm higher than that of the furnace cylinder of the vulcanization zone.

[0010] As a further improvement of the utility model, the side-blowing furnace includes a first copper water jacket, the first copper water jacket is provided with a first tuyere, there are multiple first tuyere and they are equidistantly arranged in the melting zone and the sulfidation zone, the horizontal height of the first tuyere in the sulfidation zone is 50-250mm lower than the horizontal height of the first tuyere in the melting zone, the inner diameter of the first tuyere is 32mm-45mm, and the first spray gun is concentrically arranged with the first tuyere.

[0011] As a further improvement of the utility model, the slag-nickel separation device comprises a second copper water jacket, the second spray guns are arranged on the second copper water jacket at equal distances and heights, and the horizontal height of the second spray guns is 50-350 mm higher than the horizontal height of the first tuyere in the sulfidation zone.

[0012] As a further improvement of the utility model, it also includes:

[0013] A charging port is provided at the top of the side-blown furnace for feeding materials, and there are 3 to 6 charging ports;

[0014] The accident discharge port is arranged in the side-blown furnace near the vulcanization zone and is used to discharge the melt in the furnace when the furnace condition is abnormal; there are 1-2 accident discharge ports.

[0015] As a further improvement of the present invention, the slag-nickel separation device includes a slag outlet and a siphon channel. The molten slag and matte nickel are separated and settled in the slag-nickel separation device area. The molten slag is discharged out of the slag-nickel separation device through the slag outlet arranged at the end, and the matte nickel is discharged through the bottom siphon channel. The slope of the siphon channel is 25°-45°.

[0016] As a further improvement of the utility model, a first flue is provided on the first partition wall, and the flue gas generated on the slag-nickel separation device is discharged into the side-blown furnace through the first flue. The side-blown furnace is provided with a second tuyere, and the horizontal position of the first flue is lower than the horizontal position of the second tuyere.

[0017] The beneficial effect of the utility model is that the reaction process of smelting laterite nickel ore to produce nickel matte can be carried out continuously, stably and efficiently. Powdered coal and sulfur are sprayed into the side-blown furnace and the slag-nickel separation device through a spray gun, so that the reduction sulfidation reaction is carried out efficiently, deeply and fully, the slag-nickel separation effect is better, the nickel content in the slag is greatly reduced, the total nickel recovery rate is further improved, and the risk resistance and profitability of the enterprise are improved. The utility model also has the advantages of simple structure, easy assembly, reliable operation, long service life, and stable grade of nickel matte. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0019] Attached Figure 2 It is a side structural schematic diagram of an embodiment of the utility model.

[0020] Attached Figure 3 It is a schematic diagram of the top structure of an embodiment of the utility model.

[0021] In the figure, 1, side-blown furnace; 2, melting zone; 3, sulfiding zone; 4, first spray gun; 5, slag-nickel separation device; 6, first partition wall; 7, first channel; 8, second spray gun; 9, first copper water jacket; 10, first tuyere; 11, second copper water jacket; 12, feeding port; 13, slag outlet; 14, siphon; 15, first flue; 16, second tuyere;. DETAILED DESCRIPTION

[0022] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0023] Depend on Figure 1 Combination Figure 2-3 As shown, a device for smelting nickel matte from laterite nickel ore comprises:

[0024] The side-blowing furnace 1 is used to melt, pre-reduced and sulfided laterite nickel ore, quartz and sulfiding agent mixed in a certain proportion under the action of oxygen-enriched air and pulverized coal to form smelting slag and nickel matte; the side-blowing furnace 1 is divided into a melting zone 2 and a sulfiding zone 3; the side-blowing furnace 1 includes a first lance 4;

[0025] The slag-nickel separation device 5 is arranged at the rear end of the sulfiding zone 3 of the side-blown furnace 1, and is separated from the sulfiding zone 3 of the side-blown furnace 1 by a first partition wall 6 and connected by a first channel 7. The smelting slag and the matte nickel flow into the slag-nickel separation device 5 together through the first channel 7 below the first partition wall 6; the slag-nickel separation device 5 includes a second spray gun 8, and the second spray gun 8 continuously and quantitatively sprays pulverized coal and sulfur intermittently into the slag layer, and further reduces and sulfides the nickel oxides in the smelting slag while maintaining the insulation and clarification temperature, so as to achieve the continuous reduction of nickel in the smelting slag and the separation of slag nickel. The beneficial effect of the utility model is that the reaction process of smelting laterite nickel ore to produce matte nickel can be carried out continuously, stably and efficiently. Pulverized coal and sulfur are sprayed into the side-blown furnace and the slag-nickel separation device through a spray gun, so that the reduction and sulfidation reaction is carried out efficiently, deeply and fully, the slag-nickel separation effect is better, the nickel content in the slag is greatly reduced, the total nickel recovery rate is further improved, and the risk resistance and profitability of the enterprise are improved. The utility model also has the advantages of simple structure, convenient assembly, reliable operation, long service life, and stable grade of nickel matte. The utility model adopts a fixed furnace type and sealed negative pressure operation, which greatly improves the operating environment and reduces the production failure rate. The laterite nickel ore that meets the requirements of the raw material ratio calculation is dried and mixed, and then added to the side-blown furnace for melting, reduction and sulfidation to form low-grade nickel matte; the low-grade nickel matte and the smelting slag enter the slag-nickel separation device connected to the side-blown furnace body for slag-nickel separation. The side-blown furnace blows oxygen-enriched air into the smelting section and sprays pulverized coal for melting and pre-reduction, and sprays pulverized coal and sulfur for reduction and sulfidation in the reduction and sulfidation section. The main function of the smelting section is to quickly realize the material heating, so that the laterite nickel ore, quartz slag-making agent, anthracite in the melt, and the added granular coal and the sprayed pulverized coal are in rapid, full and frequent contact under high temperature conditions, and pre-reduction and slag-making reactions occur, creating favorable conditions for the sulfidation reaction in the reduction section. The reduction and sulfidation section is the key link in the formation of low-grade nickel matte. The sulfur injected from the spray gun (first spray gun) undergoes reduction and sulfidation reaction with the nickel oxide in the melt in this area under the condition of simultaneously injecting pulverized coal, and quickly forms nickel matte and smelting slag. A small amount of pulverized coal and sulfur are injected from the spray gun (second spray gun) on both sides of the slag-nickel separation device, and the nickel in the slag is further reduced and sulfided while ensuring the melt temperature, so as to reduce the nickel content of the slag as much as possible. The angle, diameter, injection flow rate of the spray gun and the injection amount of pulverized coal, sulfur and conveying gas are controlled to ensure the rapid separation and stratification of slag and nickel. The side-blown furnace and slag-nickel separation device can achieve efficient slag-nickel separation and minimize the nickel content of the slag. Compared with the prior art, the side-blown furnace of the utility model divides the furnace area into two sections from the reaction process mechanism, adds different reaction media in different reaction sections, controls the melt temperature and reaction atmosphere, and makes the laterite nickel ore melting, reduction, sulfidation and slag-nickel separation process natural, continuous and stable. The two reaction sections can also be physically isolated as required.The top cover of the side-blown furnace is also equipped with inlets for adding sulfiding agents such as crushed coal and pyrite or sulfogypsum. The sulfiding process can be regulated by various means, and the best sulfiding agent selection and addition ratio can be gradually explored during the production process. The additional slag-nickel separation device connected to the side-blown furnace body can maintain a higher temperature during slag-nickel separation and further sulfide the nickel oxide in the slag. Higher temperatures can reduce the viscosity of slag and matte nickel, ensure that matte nickel has better permeability and fluidity, and accelerate separation from slag. Using pulverized coal and sulfur instead of electrode heating and heat preservation can not only play a role in heating and sulfidation, but also make the furnace structure simpler and more convenient to operate. Controlling lower slag nickel content means that the system will have a higher nickel recovery rate, and the company will obtain better economic benefits under the same ore processing volume.

[0026] The inner cavity of the side-blown furnace 1 has a square structure when viewed from above, with a cross-sectional width of 2000mm-2400mm and a length of 18000-35000mm; the length of the melting zone 2 is about 12000-24000mm, and the length of the sulfiding zone 3 is 6000-12000mm; the left-view cross-section of the side-blown furnace 1 is a structure that is narrow at the bottom and wide at the top. Specifically, the side-blown furnace is divided into a melting zone and a sulfiding zone, which are divided by the depth and length of the furnace cylinder, the number of tuyere and the blowing medium; a physical partition wall may or may not be set between the melting zone and the sulfiding zone. Specifically, the inner cavity of the slag-nickel separation device 5 has a square structure when viewed from above, with a cross-sectional width consistent with that of the side-blown furnace 1 and a length of 3600-6000mm. Specifically, the depth of the furnace cylinder portion of the melting zone 2 in the side-blown furnace 1 is 100-400mm higher than that of the furnace cylinder portion of the sulfiding zone 3. This makes it easier for materials to react reliably, improves reaction efficiency, and allows for more precise control.

[0027] The side-blowing furnace 1 comprises a first copper water jacket 9, on which a first tuyere 10 is arranged, and there are a plurality of first tuyere 10 which are equidistantly arranged at the melting zone 2 and the sulfiding zone 3, and the horizontal height of the first tuyere 10 at the sulfiding zone 3 is 50-250 mm lower than the horizontal height of the first tuyere 10 at the melting zone 2, and the inner diameter of the first tuyere 10 is 32 mm-45 mm, and the first spray gun 4 is concentrically arranged with the first tuyere 10. Specifically, the slag-nickel separation device 5 comprises a second copper water jacket 11, and the second spray gun 8 is equidistantly and equidistantly arranged at the second copper water jacket 11, and the horizontal height of the second spray gun 8 is 50-350 mm higher than the horizontal height of the first tuyere 3 at the sulfiding zone 3. In this way, the reduction sulfidation reaction is more sufficient, the resource utilization rate is high, and the reaction is more efficient.

[0028] The utility model also includes:

[0029] A feeding port 12 is provided at the top of the side-blown furnace 1 for feeding materials, and there are 3 to 6 feeding ports 12;

[0030] The accident discharge port is arranged near the sulfurization zone 3 of the side-blown furnace 1, and is used to discharge the melt in the furnace when the furnace condition is abnormal; there are 1-2 accident discharge ports. The charging ports can be used to add sulfiding agents such as laterite nickel ore, quartz stone, anthracite, pyrite or sulfur gypsum, etc. The charging ports are equidistantly distributed according to the melting and reduction sulfurization areas to ensure that the materials entering the furnace are evenly distributed in the furnace for better mixing, contact and reaction. The accident discharge port is set so that the melt in the furnace can be discharged through the accident discharge port when the furnace condition is abnormal and the furnace needs to be shut down urgently.

[0031] The slag-nickel separation device 5 includes a slag outlet 13 and a siphon channel 14. The slag and matte nickel are separated and settled in the area of ​​the slag-nickel separation device 5. The slag is discharged from the slag-nickel separation device 5 through the slag outlet 13 arranged at the end, and the matte nickel is discharged through the bottom siphon channel 14. The slope of the siphon channel 14 is 25°-45°. This facilitates the reliable discharge of the slag and the collection of the required matte nickel.

[0032] The first partition wall 6 is provided with a first flue 15, and the flue gas generated by the slag-nickel separation device 5 is discharged into the side-blowing furnace 1 through the first flue 15. The side-blowing furnace 1 is provided with a second tuyere 16, and the horizontal position of the first flue 15 is lower than the horizontal position of the second tuyere 16. The flue gas generated in the slag-nickel separation device area can be discharged into the side-blowing furnace through the first flue, and CO is reacted to generate CO2 under the action of the secondary wind of the side-blowing furnace, and discharged through the main flue of the side-blowing furnace. The first flue should be set at a position lower than the second tuyere of the reduction and sulfidation section of the side-blowing furnace.

[0033] The furnaces at the bottom of the side-blown furnace and the slag-nickel separation device are built with refractory materials, and the reaction temperature in this area is 1250℃--1350℃; the upper side walls and end wall areas are built with copper water jackets, and the reaction temperature in this area is 1350℃--1450℃, and the top is made of molten steel jackets and castables. Specifically, the copper water jacket of the furnace body is cooled by circulating softened water, and the circulating water is one-in-one-out, and the inlet and outlet temperature difference is controlled at 5℃. The copper water jacket cooling circulating water at the first tuyere in contact with the melt adopts a two-in-two-out method. This can achieve reliable cooling, extend the service life of the product, and control the reaction temperature.

[0034] A method for preparing nickel matte, using the above-mentioned device for smelting nickel matte from laterite nickel ore, and the preparation steps are as follows:

[0035] Step 1, dry laterite nickel ore, quartz, anthracite and a sulfiding agent mixed in a certain proportion are dropped from a feed port 12 into a melting zone 2 of a side-blown furnace 1; specifically, the sulfiding agent is pyrite or calcium sulfate, etc.;

[0036] Step 2, oxygen-enriched air with an oxygen concentration of 60-95% and a gauge pressure of 100 kPa is sprayed into the side-blown furnace 1 from the first tuyere 10, and the first tuyere 10 is located 0.4-0.8 m below the static melt surface, and the sprayed oxygen-enriched air causes the melt in the side-blown furnace 1 to be strongly agitated;

[0037] Step 3, the added laterite nickel ore, quartz, anthracite and sulfiding agent fall into the melt stirred in the melting zone 2 and are heated by the heat transfer of the high-temperature melt; the fusible components are quickly melted to form metal phase droplets in the slag, and other solvents and high melting point components and coal undergo violent chemical reactions to supply heat in the furnace and complete the slag-making reaction;

[0038] Step 4, the metal oxides in the melt in the sulfiding zone 3 continue to chemically react with the pulverized coal sprayed from the first spray gun 4 and the sulfiding agent, and the pulverized coal and the CO gas generated by its combustion reduce the metal oxides in the raw material into metal droplets, which continuously collide and grow and then sink to the bottom of the furnace, thereby separating from the slag; in order to make the reduction reaction of the metal in this area more thorough, the horizontal height of the first tuyere 10 in the sulfiding zone 3 is 50-250mm lower than the horizontal height of the first tuyere 10 in the melting zone 2;

[0039] Step 5, after the reaction is completed, the melt enters the slag-nickel separation device 5, and pulverized coal and sulfur are quantitatively sprayed from the second spray gun 8 in the slag-nickel separation device 5, and the melt is continuously heated and sulfided, so that the unreacted metal oxides in the slag are reduced and clarified, and the nickel content in the slag is reduced, so that the slag-nickel efficient separation is achieved, thereby reducing the nickel content in the slag to a minimum;

[0040] Step 7, the gas generated by the reaction of the side-blowing furnace 1 and the slag-nickel separation device 5 continuously rises from the melt. Since the furnace is a reducing gas, a second tuyere 16 is provided on the first copper water jacket 9 on the upper side of the side-blowing furnace 1 to blow in compressed air. The compressed air can react the CO in the reaction-generated gas to generate CO2, and discharge it through the main flue of the side-blowing furnace 1. After drying and batching, the laterite nickel ore is added to the side-blowing furnace for melting, reduction and sulfidation to form low-grade nickel matte; the low-grade nickel matte enters the slag chamber together with the smelting slag to separate the slag from nickel. The side-blowing furnace blows in oxygen-enriched air and sprays pulverized coal in the smelting section for melting and pre-reduction, and sprays pulverized coal and sulfur in the reduction and sulfidation sections for reduction and sulfidation; a small amount of pulverized coal and sulfur are sprayed in on both sides of the slag chamber by a spray gun, and the nickel in the slag is further reduced and sulfided while ensuring the temperature of the melt insulation and clarification, so as to reduce the nickel grade of the slag as much as possible. Control the angle, diameter, injection velocity and injection amount of pulverized coal, sulfur and conveying gas of the spray gun to ensure rapid separation and stratification of slag and nickel. The side-blowing furnace and slag-nickel high-efficiency separation device can achieve high-efficiency slag-nickel separation and minimize the nickel content in the slag.

[0041] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0043] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the utility model concept is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of the utility model patent right.

Claims

1. A device for smelting nickel matte from laterite nickel ore, characterized in that :include: A side-blown furnace (1) is used to melt, pre-reduced and sulfided laterite nickel ore, quartz and a sulfiding agent mixed in a certain proportion under the action of oxygen-enriched air and pulverized coal to form smelting slag and nickel matte; the side-blown furnace (1) is divided into a melting zone (2) and a sulfiding zone (3); the side-blown furnace (1) includes a first spray gun (4); The slag-nickel separation device (5) is arranged at the rear end of the sulfiding zone (3) of the side-blown furnace (1), is separated from the sulfiding zone (3) of the side-blown furnace (1) by a first partition wall (6) and is connected to the first channel (7). The smelting slag and the nickel matte flow into the slag-nickel separation device (5) through the first channel (7) below the first partition wall (6); the slag-nickel separation device (5) includes a second spray gun (8), and the second spray gun (8) continuously and quantitatively sprays pulverized coal and sulfur intermittently into the slag layer, while maintaining the insulation and clarification temperature, further reducing and sulfiding the nickel oxide in the smelting slag, thereby achieving continuous reduction of nickel in the smelting slag and separation of slag nickel.

2. The device for smelting nickel matte from laterite nickel ore according to claim 1, characterized in that The inner cavity of the side-blown furnace (1) has a square cross-section when viewed from above, with a cross-section width of 2000 mm to 2400 mm and a length of 18000 to 35000 mm; the length of the melting zone (2) is approximately 12000 to 24000 mm, and the length of the vulcanization zone (3) is 6000 to 12000 mm; the left-side cross-section of the side-blown furnace (1) is a structure that is narrow at the bottom and wide at the top.

3. The device for smelting nickel matte from laterite nickel ore according to claim 2, characterized in that The inner cavity of the slag-nickel separation device (5) has a square cross-section when viewed from above, and its cross-sectional width is consistent with that of the side-blown furnace (1), and its length is 3600-6000 mm.

4. The device for smelting nickel matte from laterite nickel ore according to claim 1, characterized in that The depth of the furnace hearth of the melting zone (2) in the side-blown furnace (1) is 100-400 mm higher than that of the furnace hearth of the vulcanization zone (3).

5. The device for smelting nickel matte from laterite nickel ore according to claim 1, characterized in that The side-blowing furnace (1) comprises a first copper water jacket (9), on which a first tuyere (10) is arranged, wherein a plurality of the first tuyere (10) are arranged equidistantly at the melting zone (2) and the sulfidation zone (3), wherein the horizontal height of the first tuyere (10) at the sulfidation zone (3) is 50-250 mm lower than the horizontal height of the first tuyere (10) at the melting zone (2), wherein the inner diameter of the first tuyere (10) is 32 mm-45 mm, and the first spray gun (4) is arranged concentrically with the first tuyere (10).

6. The device for smelting nickel matte from laterite nickel ore according to claim 5, characterized in that The slag-nickel separation device (5) comprises a second copper water jacket (11), and the second spray guns (8) are arranged on the second copper water jacket (11) at equal distances and heights, and the horizontal height of the second spray guns (8) is 50-350 mm higher than the horizontal height of the first tuyere in the sulfidation zone (3).

7. The device for smelting nickel matte from laterite nickel ore according to claim 1, characterized in that Also includes: A feeding port (12) is provided at the top of the side-blown furnace (1) for feeding materials, and there are 3 to 6 feeding ports (12); An emergency discharge port is provided in the side-blown furnace (1) near the vulcanization zone (3) and is used to discharge the melt in the furnace when the furnace condition is abnormal; there are 1-2 emergency discharge ports.

8. The device for smelting nickel matte from laterite nickel ore according to claim 1, characterized in that The slag-nickel separation device (5) comprises a slag outlet (13) and a siphon channel (14). The molten slag and the matte nickel are separated and settled in the area of ​​the slag-nickel separation device (5). The molten slag is discharged out of the slag-nickel separation device (5) through the slag outlet (13) arranged at the end, and the matte nickel is discharged through the bottom siphon channel (14). The slope of the siphon channel (14) is 25°-45°.

9. The device for smelting nickel matte from laterite nickel ore according to claim 1, characterized in that The first partition wall (6) is provided with a first flue (15), and the flue gas generated by the slag-nickel separation device (5) is discharged into the side-blown furnace (1) through the first flue (15). The side-blown furnace (1) is provided with a second tuyere (16), and the horizontal position of the first flue (15) is lower than the horizontal position of the second tuyere (16).

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