A method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore

Abstract

The present invention relates to a method for preparing high-nickel matte by using ternary iron-aluminum slag and laterite nickel ore, and belongs to the technical field of nickel matte preparation. The method comprises the following steps: (1) drying: drying the ternary iron-aluminum slag and laterite nickel ore respectively; (2) mixing and granulating: mixing the dried ternary iron-aluminum slag, laterite nickel ore, a first flux and a reducing agent uniformly, and granulating to obtain mixed pellets; (3) reduction sulfidation smelting: sending the mixed pellets obtained in step (2) into a side-blown furnace for reduction sulfidation smelting to obtain low-nickel matte, smelting slag and a first flue gas; (4) blowing: mixing the low-nickel matte obtained in step (3) uniformly with a second flux, and sending it into a side-blown furnace for blowing to obtain high-nickel matte, blowing slag and a second flue gas. By using ternary iron-aluminum slag as a sulfiding agent, the nickel and cobalt in the ternary iron-aluminum slag can be effectively recovered and utilized, and high nickel matte with high nickel and cobalt grades and high nickel and cobalt direct recovery rates can be obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of nickel matte preparation, and in particular to a method for preparing high-nickel matte by using ternary iron-aluminum slag and laterite nickel ore. Background Art

[0002] As the demand for new energy vehicles continues to increase, a large number of waste automobile batteries are also produced. In the process of wet processing of waste ternary positive electrode material batteries, a large amount of iron-aluminum slag is produced, which is called ternary iron-aluminum slag. Ternary iron-aluminum slag is rich in valuable metals such as nickel, cobalt, and manganese. If the ternary iron-aluminum slag is not recycled, it will cause a large loss of valuable metals. In addition, a large amount of ternary iron-aluminum slag is piled up for a long time, which not only occupies land and wastes resources but also pollutes the environment. In addition, at present, the ternary iron-aluminum slag is mainly recycled by hydrometallurgy, but the treatment of ternary iron-aluminum slag by hydrometallurgy has the following disadvantages: (1) complex process flow; (2) large reagent consumption and high production cost; (3) difficult controllable process operation, which is not conducive to safe production; (4) high requirements for equipment. Therefore, it is necessary to develop a route for recycling ternary iron-aluminum slag.

[0003] In the existing method of preparing nickel matte by treating laterite nickel ore, the laterite nickel ore and pyrite (FeS 2 ) / Gypsum(CaSO 4 ·2H 2 O) Processing by pyrometallurgical method to obtain nickel matte. The pyrometallurgical method to process laterite nickel ore to produce nickel matte mainly includes electric furnace smelting, RKEF process and oxygen-enriched side-blowing reduction sulfidation process. However, electric furnace smelting and RKEF process have the following disadvantages: (1) high energy consumption and high production cost; (2) the process has a rotary kiln pre-reduction step, which has high process cost; (3) low cobalt recovery rate. The oxygen-enriched side-blowing reduction sulfidation process can produce both nickel iron and nickel matte. It is a relatively new process and has great advantages in all aspects. Its process route is as follows: laterite nickel ore → oxygen-enriched side-blowing (reduction sulfidation) smelting → low nickel matte → side-blowing furnace blowing → high nickel matte.

[0004] Chinese invention patent application CN115852165A discloses a method for producing low-nickel matte from laterite nickel ore, the main steps of which are: mixing laterite nickel ore, a first sulfiding agent (gypsum slag) and a first carbon-based reducing agent uniformly and then sending them into a rotary kiln for reduction sulfidation roasting to obtain sulfided roasted sand; then mixing the sulfided roasted sand, a second carbon-based reducing agent and a second sulfiding agent (sulfur) uniformly and then sending them into a rotary kiln again for supplementary sulfidation reaction to obtain supplementary sulfided roasted sand; sending the supplementary sulfided roasted sand into an electric furnace or a side-blown furnace for smelting to obtain low-nickel matte and slag. However, the invention patent application has the following disadvantages: two rotary kiln pre-reduction roastings are required to prepare the roasted sand, the process flow is complicated, and gypsum slag and sulfur are used as sulfiding agents respectively, sulfur is relatively toxic, and the sulfidation equipment and technology used in production are required to be high.

[0005] Chinese invention patent application CN113999991A discloses a method for producing high nickel matte by continuous sulfurization and blowing of nickel iron from laterite nickel ore, the main steps of which are as follows: smelting laterite nickel ore into nickel iron alloy and then subjecting the alloy to primary water quenching and granulation, forming nickel iron particles after the primary water quenching and granulation, and then continuously feeding the nickel iron particles, a sulfurizing agent (sulfur) and a flux into a converter for sulfurization and blowing to form molten high nickel matte, and forming high nickel matte particles after secondary water quenching and granulation. However, the invention patent application has the following disadvantages: 1. Sulfur is used as a sulfurizing agent, and the boiling point of sulfur is low (445°C), and sulfur is relatively toxic, which places high requirements on the sulfurization equipment and technology used in production; 2. Using a converter for blowing, there is excess heat energy and a large heat load on the furnace.

[0006] Chinese invention patent application CN103103352A discloses a method for producing nickel matte by combining sulfur-containing waste slag with laterite nickel ore. The main steps are: uniformly mixing sulfur-containing waste slag, reducing agent and laterite nickel ore; then smelting in a DC furnace or AC furnace at 1200℃~1400℃ for 20~60min to obtain nickel matte product. However, the invention patent application has the following disadvantages: 1. The grade and recovery rate of valuable metal nickel and cobalt in the product are low; 2. The electric furnace smelting is adopted, and the process energy consumption is high and the production cost is high.

[0007] Therefore, it is necessary to seek a process for preparing high-nickel matte by combining ternary iron-aluminum slag and laterite nickel ore. Summary of the invention

[0008] Based on this, the purpose of the present invention is to provide a method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore, and to use ternary iron aluminum slag to replace pyrite (FeS 2 ) / Gypsum(CaSO 4 ·2H 2O) is used as a sulfiding agent in the process, and high-nickel matte is prepared by reduction sulfidation in a side-blown furnace, so that valuable metals such as nickel and cobalt in the ternary iron-aluminum slag are effectively recovered and utilized, and high-nickel matte with high nickel and cobalt grades and high nickel and cobalt direct recovery rates is obtained.

[0009] A method for preparing high-nickel matte by using ternary iron-aluminum slag and laterite nickel ore, comprising the following steps:

[0010] (1) Drying: Drying the ternary iron-aluminum slag and the laterite-nickel ore separately, so that the moisture content of the ternary iron-aluminum slag is dried to 10% to 15%, and the moisture content of the laterite-nickel ore is dried to 10% to 15%;

[0011] (2) mixing and granulating: uniformly mixing the dried ternary iron-aluminum slag, laterite nickel ore, the first flux and the reducing agent, and granulating to obtain mixed granules;

[0012] (3) Reduction sulfidation smelting: the mixed pellets obtained in step (2) are fed into a side-blown furnace for reduction sulfidation smelting to obtain low-nickel matte, smelting slag and first flue gas;

[0013] (4) Blowing: The low-nickel matte obtained in step (3) is evenly mixed with the second flux and then sent to a side-blown furnace for blowing to obtain high-nickel matte, blowing slag and second flue gas.

[0014] The method for preparing high nickel matte by using ternary ferroaluminum slag and laterite nickel ore disclosed in the present invention prepares high nickel matte by using ternary ferroaluminum slag and laterite nickel ore. Since the aluminum content in the ternary ferroaluminum slag is relatively high, the aluminum content in the mixed pellets formed by mixing and granulating the ternary ferroaluminum slag, laterite nickel ore, the first flux and the reducing agent is increased. Most of the aluminum in the mixed pellets forms a quaternary slag system with the calcium, silicon and magnesium elements in the mixed pellets, which can improve the fluidity of the smelting slag and reduce the viscosity of the smelting slag in step (3), i.e., during the reduction sulfidation smelting process. In this way, the low nickel matte obtained by the reduction sulfidation smelting is more easily aggregated, and the Ni and Co grades and direct recovery rate in the low nickel matte are higher, thereby further improving the Ni and Co grades and direct recovery rate in the high nickel matte. In addition, in step (3), i.e., the reduction sulfidation smelting process, the ternary iron-aluminum slag can be used as a sulfiding agent in the process to improve the reduction sulfidation effect in the reduction sulfidation process. At the same time, the nickel and cobalt in the ternary iron-aluminum slag enter the low-nickel matte and finally enter the high-nickel matte, thereby improving the nickel and cobalt grades in the high-nickel matte.

[0015] The present invention discloses a method for preparing high-nickel matte by combining ternary iron-aluminum slag with laterite nickel ore. The nickel and cobalt in the ternary iron-aluminum slag enter the high-nickel matte, which not only improves the grade of nickel and cobalt in the high-nickel matte, but also enables the valuable metals such as nickel and cobalt in the ternary iron-aluminum slag to be effectively recycled, while other impurity elements (manganese, aluminum, calcium, magnesium, silicon, etc.) enter the slag and are solidified, which can synergistically realize the resource utilization of the ternary iron-aluminum slag, effectively reduce the stockpile of the ternary iron-aluminum slag, and reduce pollution to the land.

[0016] As a preferred embodiment, in step (1), the ternary iron-aluminum slag comprises the following components in mass fraction: Ni 2.1%-2.6%, Co 1.3%-1.5%, Mn 1.0%-1.2%, Fe 22.9%-23.4%, S29.8%-30.4%, Al15.4%-15.9%, P 5.2%-5.7%, Ca 10.7%-11.2%, Mg 6.0%-6.9%, Si0.2%-0.3%, and other components 0.9%-5.4%; the laterite nickel ore comprises the following components in mass fraction: Ni 1.7%-1.8%, Co 0.05%-0.08%, Mn 0.6%-0.8%, Cr 0.7%-1.0%, Fe 34.9%-35.9%, S 0.1% to 0.2%, Al 3.8% to 4.2%, Ca 0.2% to 0.8%, Mg 23.7% to 24.1%, Si 28.8% to 29.5%, and other components 1.62% to 5.45%. In some preferred schemes, the ternary iron-aluminum slag and the laterite nickel ore with the above-mentioned content components are respectively used so that the valuable metals such as nickel and chromium rich therein can be effectively utilized. The ternary iron-aluminum slag and the laterite nickel ore provide elements such as manganese, aluminum, calcium, magnesium, silicon, etc., which can form a slag system in the reduction sulfidation smelting process, improve the fluidity of the smelting slag in step (3), i.e., in the reduction sulfidation smelting process, and reduce the viscosity of the smelting slag.

[0017] As a preferred solution, in step (1), the ternary iron-aluminum slag and the laterite nickel ore are respectively sent to a rotary kiln for drying treatment, and dried at 100°C to 300°C for 3h to 7h. The ternary iron-aluminum slag and the laterite nickel ore are respectively sent to a rotary kiln for drying treatment at a drying temperature of 100°C to 300°C and a drying time of 3h to 7h, which can reduce the moisture in the ternary iron-aluminum slag and the laterite nickel ore, respectively, so that the moisture content of the ternary iron-aluminum slag is dried to 10% to 15%, and the moisture content of the laterite nickel ore is dried to 10% to 15%.

[0018] As a preferred solution, in step (2), before mixing, the dried ternary iron-aluminum slag and laterite nickel ore in step (1) are crushed and sieved respectively, and the ternary iron-aluminum slag and laterite nickel ore are sieved to 3mm-5mm respectively; the particle size of the reducing agent is 1mm-2mm; the ternary iron-aluminum slag, laterite nickel ore, the first flux and the reducing agent are mixed evenly to obtain a mixed material with a particle size of 4mm-6mm, and then the mixed material is granulated to obtain a mixed granular material with a particle size of 10-15mm. By sieving the ternary iron-aluminum slag and laterite nickel ore to 3mm-5mm respectively and selecting a reducing agent with a particle size of 1mm-2mm, the purpose is to mix evenly after mixing and facilitate more sufficient reaction during subsequent reduction sulfide smelting; if the particle size is too large, the material mixing is uneven and the subsequent reaction is insufficient; if the particle size is too fine, it is easy to enter the smoke and dust during the subsequent reaction process, causing certain losses, so the material particle size should be selected within an appropriate range.

[0019] As a preferred solution, in step (2), the mass ratio of ternary ferroaluminum slag, laterite nickel ore, first flux and reducing agent is (20-50):50:(4-7):(2.5-4). The present invention adopts the mass ratio of ternary ferroaluminum slag, laterite nickel ore, first flux and reducing agent as (20-50):50:(4-7):(2.5-4), and the low-nickel-sulfur Ni and Co produced in the reduction sulfidation smelting have high grade and high direct yield, the slag type of the smelting slag meets the requirements, the smelting slag has good fluidity and low viscosity, which is more conducive to the aggregation of nickel matte, and the reaction temperature is also low, reducing energy consumption.

[0020] As a preferred solution, the reducing agent is at least one of pulverized coal, semi-coke, reduced coal and coke. Using at least one of pulverized coal, semi-coke, reduced coal and coke as a reducing agent can effectively reduce the high-valent sulfur in the ternary iron-aluminum slag and laterite nickel ore to convert it into nickel matte.

[0021] As a preferred solution, the first flux is at least one of quartz sand and limestone. Using at least one of quartz sand and limestone as the first flux can achieve better smelting effect in the reduction sulfide smelting process.

[0022] As a preferred solution, in step (3), the smelting temperature is 1300°C to 1600°C, and the smelting time is 30 to 60 minutes. In the reduction sulfidation smelting process, the smelting is carried out at a smelting temperature of 1300°C to 1600°C for 30 to 60 minutes, so that the reducing agent can fully react with the ternary iron-aluminum slag and laterite nickel ore to be converted into low-nickel matte.

[0023] As a preferred embodiment, the low nickel matte obtained in step (3) contains the following components in mass percentage: Ni 10%-28%, Co 0.2%-0.3%, Fe 50%-70%, S19%-21%; the smelting slag obtained in step (3) contains the following components in mass percentage: Ni 0.09%-0.2%, Co 0.01%-0.04%, Mn 0.2%-0.5%, FeO 35%-40%, CaO 10%-13%, SiO 2 28%~34%,Al 2 O 3 10% to 15% and MgO 10% to 16%. The preparation method of this scheme can obtain low-nickel sulfur with a nickel direct recovery rate of 93% to 98% and a cobalt direct recovery rate of 95% to 98%, which can effectively utilize the nickel and cobalt in laterite nickel ore and ternary iron-aluminum slag.

[0024] As a preferred solution, in step (4), the mass ratio of the second flux to the low nickel matte is (10-15):50. Limiting the mass ratio of the second flux to the low nickel matte to (10-15):50 can make the Ni and Co grades of the high nickel-sulfur produced during the blowing process high, the direct recovery rate is also high, and the blowing effect is better.

[0025] As a preferred solution, in step (4), the blowing temperature is 1350°C to 1500°C, and the smelting time is 60 to 120 minutes. During the blowing process, smelting at a smelting temperature of 1350°C to 1500°C for 60 to 120 minutes can fully reduce the Fe content in the high-nickel matte, thereby improving the nickel and cobalt grades of the high-nickel matte.

[0026] As a preferred embodiment, the high nickel matte obtained in step (4) contains the following components in mass percentage: Ni 40% to 61%, Co 1.3% to 2.4%, Fe 7% to 38%, S 20% to 28%; the blowing slag obtained in step (4) contains the following components in mass percentage: Ni 1.5% to 3.3%, Co 0.5% to 1.5%, Mn 1.2% to 2.0%, FeO 38% to 43%, CaO 7% to 11%, SiO 2 30%~36%,Al 2 O 3 7% to 10%, MgO 8% to 12%. The preparation method of this scheme can obtain high-nickel sulfur with a nickel direct recovery rate of 95% to 98% and a cobalt direct recovery rate of 95% to 97%, and the nickel and cobalt grades in the high-nickel matte are higher.

[0027] As a preferred solution, in step (4), the low nickel matte is mixed with the second flux evenly and then sent to the side-blown furnace and blown with compressed air. The compressed air supply rate is 10000 Nm 3 / h~20000Nm 3 / h. Using compressed air for blowing and controlling the air supply rate can achieve better blowing effects.

[0028] As a preferred solution, the second flux is at least one of quartz sand and limestone. Using at least one of quartz sand and limestone as the second flux can achieve better blowing effect.

[0029] As a preferred solution, the method for preparing high-nickel matte by using ternary iron-aluminum slag and laterite-nickel ore disclosed in the present invention further comprises the following steps:

[0030] (5) Secondary reduction sulfidation smelting / secondary blowing: The blown slag obtained in step (4) is subjected to secondary reduction sulfidation smelting to obtain low-nickel matte, smelting slag, and a first flue gas, and a second flux is added to the low-nickel sulfur for blowing to obtain high-nickel matte, blowing slag, and a second flue gas; or the blown slag obtained in step (4) is mixed with the second flux and subjected to secondary blowing to obtain high-nickel matte, blowing slag, and a second flue gas.

[0031] In order to further improve the utilization rate of nickel and cobalt, the present disclosure can also subject the smelting slag obtained in step (4) to secondary reduction sulfidation smelting or secondary blowing, so that the nickel and cobalt in the blowing slag can be effectively utilized.

[0032] As a preferred solution, the method for preparing high-nickel matte by using ternary iron-aluminum slag and laterite-nickel ore disclosed in the present invention further comprises the following steps:

[0033] (6) quenching the smelting slag: quenching the smelting slag obtained in step (3) and step (5) to obtain water-quenched slag, which is recycled;

[0034] (7) Waste heat recovery: The first flue gas obtained in step (3) and step (4) and the second flue gas obtained in step (5) are respectively introduced into a waste heat boiler for cooling to recover waste heat.

[0035] Water-quenched slag is obtained by quenching the smelting slag with water, and the water-quenched slag can be further recycled; the first flue gas and the second flue gas are respectively passed into the waste heat boiler for cooling to recover the waste heat, and a large amount of steam generated by the cooling can be used for power generation or other production purposes; the flue gas after cooling by the waste heat boiler is passed into the electric precipitator and the bag filter to collect the smoke to achieve the dust removal effect; the dust removal smoke is then denitrified and desulfurized to meet the qualified emission standards and discharged into the atmosphere.

[0036] Compared with the prior art, the beneficial effects of the present disclosure are:

[0037] (1) The method disclosed in the present invention combines ternary iron-aluminum slag with laterite nickel ore to prepare high-nickel matte, so that the nickel and cobalt in the ternary iron-aluminum slag enter the high-nickel matte, which not only improves the grade of nickel and cobalt in the nickel matte, but also enables the valuable metals such as nickel and cobalt in the ternary iron-aluminum slag to be effectively recycled, while other impurity elements (manganese, aluminum, calcium, magnesium, silicon, etc.) enter the smelting slag and are solidified. The combination of ternary iron-aluminum slag and laterite nickel ore can synergistically realize the resource utilization of ternary iron-aluminum slag, effectively reduce the stockpile of ternary iron-aluminum slag, and reduce pollution to the land.

[0038] (2) When the ternary iron-aluminum slag and laterite nickel ore are combined to prepare high-nickel matte, due to the high aluminum content in the ternary iron-aluminum slag, the aluminum content in the entire mixed material system of the ternary iron-aluminum slag and laterite nickel ore is increased, and most of the aluminum forms a quaternary slag system with the calcium, silicon and magnesium elements in the mixed material, which further improves the fluidity of the smelting slag and reduces the viscosity of the smelting slag. In this way, the low-nickel matte obtained by reduction and sulfidation is more likely to aggregate into agglomerates, and the Ni and Co grades and direct recovery rates in the low-nickel matte are higher, thereby improving the Ni and Co grades and direct recovery rates in the low-nickel matte.

[0039] (3) Replace pyrite (FeS 2 ) / Gypsum(CaSO 4 ·2H 2 O) as a sulfiding agent in the reduction sulfidation smelting process, ternary iron-aluminum slag is used as a sulfiding agent, and the NiSO in the ternary iron-aluminum slag 4 、CoSO 4 , Fe 2 (SO 4 ) 3 Respectively react with reducing agents (pulverized coal, semi-coke, reduced coal or coke) to generate NiS, CoS, FeS; FeO and Fe 2 (SO 4 ) 3 It reacts with a reducing agent to generate FeS; the FeS generated subsequently reacts with NiO and CoO in laterite nickel ore to generate NiS and CoS, among which NiS, CoS and FeS are the main components of nickel matte.

[0040] (4) The present invention adopts a side-blown furnace for smelting to generate low-nickel matte, and then uses the side-blown furnace to blow the low-nickel matte to generate high-nickel matte. The process is simple, energy consumption is low, and the grade and direct recovery rate of valuable metals nickel and cobalt in the product nickel matte are high. The smelting equipment is changed from an electric furnace to a side-blown furnace, thereby reducing the equipment investment cost.

[0041] (5) The waste heat of flue gas is recovered by waste heat boiler, and the resulting steam can be used for power generation or other production purposes.

[0042] For better understanding and implementation, the present disclosure is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 The present invention provides a process flow chart for the combined preparation of high-nickel matte from ternary iron-aluminum slag and laterite-nickel ore. DETAILED DESCRIPTION

[0044] In order to better illustrate the content of the present invention, the following examples are provided. Figure 1 The process flow shown is carried out.

[0045] Example 1

[0046] This embodiment is a method for preparing high nickel matte by using ternary iron aluminum slag and sapropelite laterite nickel ore. Figure 1 , including the following steps:

[0047] In this embodiment, the chemical composition of the ternary iron-aluminum slag is: Ni 2.1%, Co 1.3%, Fe 22.9%, Mn 1.0%, P 5.2%, S29.8%, Al 15.4%, Ca 10.7%, Mg 6.0%, Si 0.2%, and other 5.4%; the chemical composition of the saprolitic laterite nickel ore is: Ni 1.7%, Co 0.05%, Fe 34.9%, Mn 0.6%, Cr 0.7%, S 0.1%, Al 3.8%, Ca 0.2%, Mg 23.7%, Si 28.8%, and other 5.45%.

[0048] (1) Drying: The ternary iron-aluminum slag and the saprolitic laterite nickel ore are respectively sent to a rotary kiln for drying, and dried at 300°C for 3 hours, and the moisture content of the ternary iron-aluminum slag and the saprolitic laterite nickel ore is dried to 10%. After the drying is completed, the dried ternary iron-aluminum slag is placed in the ternary iron-aluminum slag material bin for storage, and the dried saprolitic laterite nickel ore is placed in the saprolitic laterite nickel mineral silo for storage.

[0049] (2) Mixing ingredients and granulating:

[0050] Mixing ingredients: The ternary iron-aluminum slag and saprolitic laterite nickel ore obtained in step (1) are crushed and sieved respectively, and the ternary iron-aluminum slag and saprolitic laterite nickel ore are sieved to 3 mm, and the reducing agent particle size is required to be 1 mm. In this embodiment, the flux 1 is quartz sand and the reducing agent is blue charcoal; the ingredients are prepared with a mass ratio of ternary iron-aluminum slag, saprolitic laterite nickel ore, quartz sand and blue charcoal of 20:50:4:2.5, and the ternary iron-aluminum slag, saprolitic laterite nickel ore, quartz sand and blue charcoal are evenly mixed to obtain a fine-grained mixed material with a particle size of 4 mm.

[0051] Granulation: The obtained fine-grained mixed material is granulated to obtain coarse-grained mixed granules with a particle size of 10 mm. The purpose is to prevent the mixed granules entering the side-blown furnace from being too fine, causing most of the material to enter the smoke and dust, resulting in certain losses.

[0052] (3) Reduction sulfidation smelting: The coarse-grained mixed pellets obtained in step (2) are fed into a side-blown furnace for reduction sulfidation smelting at a smelting temperature of 1300°C for 30 minutes. After natural cooling, low-nickel matte, smelting slag and a portion of flue gas 1 are obtained. The obtained low-nickel matte contains the following components by mass percentage: Ni 10%, Co 0.2%, Fe 70%, S19%, the direct recovery rate of nickel is 93%, and the direct recovery rate of cobalt is 95%; the obtained smelting slag contains the following components by mass percentage: Ni 0.2%, Co 0.04%, Mn 0.5%, FeO 36%, CaO 10%, SiO 2 30%, Al 2 O 3 10%, MgO 11%, others 2.26%.

[0053] (4) Blowing: The low nickel matte obtained in step (3) is mixed evenly with flux 2 in a certain mass ratio, wherein the mass ratio of flux 2 to low nickel matte is 10:50. After being evenly mixed, it is sent into a side-blown furnace and blown with compressed air. The compressed air supply rate is 10000L / h, the blowing temperature is 1350℃, the smelting is 60min, and after natural cooling, a high nickel matte product, blowing slag and a part of flue gas 2 are obtained. Among them, the product high nickel matte contains Ni 40%, Co 1.3%, Fe 38%, S20%, the nickel direct recovery rate is 95%, and the cobalt direct recovery rate is 95%; the obtained blowing slag contains the following components in mass percentage: Ni 1.7%, Co 0.9%, Mn1.3%, FeO 39%, CaO 8%, SiO 2 31%, Al 2 O 3 8%, MgO 9%, others 1.1%.

[0054] (5) Secondary reduction sulfidation smelting / secondary blowing:

[0055] In this embodiment, one of the following two methods can be used. For the convenience of describing this embodiment, both methods of this embodiment are implemented:

[0056] The blowing slag obtained in step (4) is returned to the oxygen-enriched side-blowing furnace for secondary reduction sulfidation smelting to obtain low-nickel matte, smelting slag, and flue gas 1, and flux 2 is added to the obtained low-nickel sulfur for blowing, wherein the mass ratio of flux 2 to low-nickel matte is 10:50. After the blowing is completed, high-nickel matte, blowing slag, and a portion of flue gas 2 are obtained.

[0057] Alternatively, the blown slag obtained in step (4) is mixed with flux 2 in a certain mass ratio, wherein the mass ratio of flux 2 to blown slag is 5:50. The mixed materials are returned to the side-blowing furnace for secondary blowing to obtain high-nickel matte, blown slag, and a portion of flue gas 2.

[0058] (6) Water quenching of smelting slag: The smelting slag obtained in step (3) is subjected to water quenching treatment to obtain water-quenched slag. The water-quenched slag meets the technical specifications for external sale and can be sold externally.

[0059] (7) Waste heat recovery: The flue gas 1 obtained in step (3) and step (5) and the flue gas 2 obtained in step (4) and step (5) are respectively introduced into a waste heat boiler for cooling to recover waste heat. A large amount of steam generated by cooling can be used for power generation or other production purposes; the flue gas cooled by the waste heat boiler is introduced into an electric precipitator and a bag filter to collect the flue dust to achieve a dust removal effect; the dust removed is then denitrated and desulfurized to meet qualified emission standards and discharged into the atmosphere.

[0060] Example 2

[0061] This embodiment is a method for preparing high nickel matte by using ternary iron aluminum slag and sapropelite laterite nickel ore. Figure 1 , including the following steps:

[0062] In this embodiment, the chemical composition of the ternary iron-aluminum slag is: Ni 2.6%, Co 1.5%, Mn 1.2%, Fe23.4%, S 30.4%, Al 15.9%, P 5.7%, Ca 11.2%, Mg 6.9%, Si 0.3%, and other 0.9%; the chemical composition of the saprolitic laterite nickel ore is: Ni 1.8%, Co 0.08%, Mn 0.8%, Cr 1.0%, Fe 35.9%, S0.2%, Al 4.2%, Ca 0.8%, Mg 24.1%, Si 29.5%, and other 1.62%.

[0063] (1) Drying: The ternary iron-aluminum slag and the saprolitic laterite nickel ore are respectively sent to a rotary kiln for drying, and dried at 300°C for 3 hours, and the moisture content of the ternary iron-aluminum slag and the saprolitic laterite nickel ore is dried to 10%. After drying, the ternary iron-aluminum slag is stored in the ternary iron-aluminum slag material bin, and the saprolitic laterite nickel ore is stored in the saprolitic laterite nickel mineral silo.

[0064] (2) Mixing ingredients and granulating:

[0065] The ternary iron-aluminum slag and saprolitic laterite nickel ore obtained in step (1) are crushed and sieved respectively, and the ternary iron-aluminum slag and saprolitic laterite nickel ore are sieved to 3 mm, and the reducing agent particle size is required to be 1 mm. In this embodiment, the flux 1 is quartz sand, and the reducing agent is blue charcoal; the ternary iron-aluminum slag, saprolitic laterite nickel ore, quartz sand and blue charcoal are prepared in a mass ratio of 40:50:6:3.5, and the ternary iron-aluminum slag, saprolitic laterite nickel ore, quartz sand and blue charcoal are evenly mixed to obtain a fine-grained mixed material with a particle size of 4 mm.

[0066] Granulation: The obtained fine-grained mixed material is granulated to obtain coarse-grained mixed granules with a particle size of 10 mm. The purpose is to prevent the mixed granules entering the side-blown furnace from being too fine, causing most of the material to enter the smoke and dust, resulting in certain losses.

[0067] (3) Reduction sulfidation smelting: The coarse-grained mixed pellets obtained in step (2) are fed into a side-blown furnace for reduction sulfidation smelting at a smelting temperature of 1600°C for 60 minutes. After natural cooling, low-nickel matte, smelting slag and a portion of flue gas 1 are obtained. The obtained low-nickel sulfur contains the following components in mass percentage: Ni 28%, Co 0.3%, Fe 50%, S21%, the nickel direct recovery rate is 98%, and the cobalt direct recovery rate is 98%; the obtained smelting slag contains the following components in mass percentage: Ni 0.09%, Co 0.01%, Mn 0.2%, FeO 35%, CaO 10%, SiO 2 28%, Al 2 O 3 10%, MgO 10%, others 6.7%.

[0068] (4) Blowing: The low nickel matte obtained in step (3) is mixed evenly with flux 2 in a certain mass ratio, wherein the mass ratio of flux 2 to low nickel matte is 15:50. After being evenly mixed, it is sent into a side-blown furnace and blown with compressed air. The compressed air supply rate is 20000L / h, the blowing temperature is 1500℃, the smelting is 120min, and after natural cooling, a product high nickel matte, blowing slag and a part of flue gas 2 are obtained. Among them, the product high nickel matte contains the following components in mass percentage: Ni 61%, Co 2.4%, Fe7%, S28%, the nickel direct recovery rate is 98%, and the cobalt direct recovery rate is 97%; the obtained blowing slag contains the following components in mass percentage: Ni 1.5%, Co 0.5%, Mn 1.2%, FeO 38%, CaO 7%, SiO 2 30%, Al 2 O 3 7%, MgO 8%, others 6.8%.

[0069] (5) Secondary reduction sulfidation smelting / secondary blowing:

[0070] In this embodiment, one of the following two methods can be used. For the convenience of describing this embodiment, both methods of this embodiment are implemented:

[0071] The blown slag obtained in step (4) is returned to the oxygen-enriched side-blowing furnace for secondary reduction sulfidation smelting to obtain low-nickel matte, smelting slag, and flue gas 1, and flux 2 is added to the low-nickel sulfur for blowing, wherein the mass ratio of flux 2 to low-nickel matte is 15:50. After the blowing is completed, high-nickel matte, blown slag, and a portion of flue gas 1 are obtained as products.

[0072] Alternatively, the blown slag obtained in step (4) is mixed with flux 2 in a certain mass ratio, wherein the mass ratio of flux 2 to blown slag is 7:50. The mixed materials are returned to the side-blowing furnace for secondary blowing to obtain high-nickel matte, blown slag, and a portion of flue gas 2.

[0073] (6) Water quenching of smelting slag: The smelting slag obtained in step (3) is subjected to water quenching treatment to obtain water-quenched slag. The water-quenched slag meets the technical specifications for external sale and can be sold externally.

[0074] (7) Waste heat recovery: The flue gas 1 obtained in step (3) and step (5) and the flue gas 2 obtained in step (4) and step (5) are respectively introduced into a waste heat boiler for cooling to recover waste heat. A large amount of steam generated by cooling can be used for power generation or other production purposes; the flue gas cooled by the waste heat boiler is introduced into an electric precipitator and a bag filter to collect the flue dust to achieve a dust removal effect; the dust removed is then denitrated and desulfurized to meet qualified emission standards and discharged into the atmosphere.

[0075] Example 3

[0076] This embodiment is a method for preparing high nickel matte by using ternary iron aluminum slag and sapropelite laterite nickel ore. Figure 1 , including the following steps:

[0077] In this embodiment, the chemical composition of the ternary iron-aluminum slag is: Ni 2.3%, Co 1.4%, Mn 1.1%, Fe23.1%, S 30.2%, Al 15.6%, P 5.5%, Ca 10.9%, Mg 6.6%, Si 0.25%, and other 3.05%; the chemical composition of the saprolitic laterite nickel ore is: Ni 1.75%, Co 0.06%, Mn 0.7%, Cr 0.8%, Fe 35.5%, S0.16%, Al 4.0%, Ca 0.6%, Mg 23.9%, Si 29.3%, and other 3.23%.

[0078] (1) Drying: The ternary iron-aluminum slag and the saprolitic laterite nickel ore are respectively sent to a rotary kiln for drying, and dried at 200°C for 4 hours, and the moisture content of the ternary iron-aluminum slag and the saprolitic laterite nickel ore is dried to 12%. After drying, the ternary iron-aluminum slag is stored in the ternary iron-aluminum slag material bin, and the saprolitic laterite nickel ore is stored in the saprolitic laterite nickel mineral silo.

[0079] (2) Mixing ingredients and granulating:

[0080] Mixing ingredients: The ternary iron-aluminum slag and saprolitic laterite nickel ore obtained in step (1) are crushed and sieved respectively, and the ternary iron-aluminum slag and saprolitic laterite nickel ore are sieved to 4 mm, and the reducing agent particle size is required to be 1.5 mm. In this embodiment, the flux 1 is quartz sand and the reducing agent is blue charcoal; the ingredients are prepared with a mass ratio of ternary iron-aluminum slag, saprolitic laterite nickel ore, quartz sand and blue charcoal of 50:50:6:3.5, and the ternary iron-aluminum slag, saprolitic laterite nickel ore, quartz sand and blue charcoal are evenly mixed to obtain a fine-grained mixed material with a particle size of 4 mm.

[0081] Granulation: The obtained fine-grained mixed material is granulated to obtain coarse-grained mixed granules with a particle size of 13 mm. The purpose is to prevent the mixed granules entering the side-blown furnace from being too fine, causing most of the material to enter the smoke and dust, resulting in certain losses.

[0082] (3) Reduction sulfidation smelting: The coarse-grained mixed pellets obtained in step (2) are fed into a side-blown furnace for reduction sulfidation smelting at a smelting temperature of 1500°C for 45 minutes. After natural cooling, low-nickel matte, smelting slag and a portion of flue gas 1 are obtained. The obtained low-nickel matte contains the following components in mass percentage: Ni 26%, Co 0.24%, Fe 54%, S19%, the nickel direct recovery rate is 94%, and the cobalt direct recovery rate is 96%; the obtained smelting slag contains the following components in mass percentage: Ni 0.15%, Co 0.03%, Mn 0.3%, FeO 37%, CaO 11%, SiO 2 29%, Al 2 O 3 11%, MgO 10%, others 1.52%.

[0083] (4) Blowing: The low nickel matte obtained in step (3) is mixed evenly with flux 2 in a certain mass ratio, wherein the mass ratio of flux 2 to low nickel matte is 13:50. After being evenly mixed, it is sent into a side-blown furnace and blown with compressed air. The compressed air supply rate is 20000L / h, the blowing temperature is 1450°C, the smelting is 90min, and after natural cooling, a product high nickel matte, blowing slag and a part of flue gas 2 are obtained. Among them, the product high nickel matte contains the following components in mass percentage: Ni 53%, Co 2.1%, Fe 16%, S27%, nickel direct recovery rate is 97%, cobalt direct recovery rate is 96%, and the obtained blowing slag contains the following components in mass percentage: Ni 1.6%, Co 1.1%, Mn 1.6%, FeO 40%, CaO 7%, SiO 2 30%, Al 2 O 3 9%, MgO 8%, others 1.7%.

[0084] (5) Secondary reduction sulfidation smelting / secondary blowing:

[0085] In this embodiment, one of the following two methods can be used. For the convenience of describing this embodiment, both methods of this embodiment are implemented:

[0086] The blown slag obtained in step (4) is returned to the oxygen-enriched side-blowing furnace for secondary reduction sulfidation smelting to obtain low-nickel matte, smelting slag, and flue gas 1, and flux 2 is added to the low-nickel sulfur for blowing, wherein the mass ratio of flux 2 to low-nickel matte is 13:50. After the blowing is completed, high-nickel matte, blown slag, and a portion of flue gas 2 are obtained as products.

[0087] Alternatively, the blown slag obtained in step (4) is mixed with flux 2 in a certain mass ratio, wherein the mass ratio of flux 2 to blown slag is 6:50. The mixed materials are returned to the side-blowing furnace for secondary blowing to obtain high-nickel matte, blown slag, and a portion of flue gas 2.

[0088] (6) Water quenching of smelting slag: The smelting slag obtained in step (3) is subjected to water quenching treatment to obtain water-quenched slag. The water-quenched slag meets the technical specifications for external sale and can be sold externally.

[0089] (7) Waste heat recovery: The flue gas 1 obtained in step (3) and step (5) and the flue gas 2 obtained in step (4) and step (5) are respectively introduced into a waste heat boiler for cooling to recover waste heat. A large amount of steam generated by cooling can be used for power generation or other production purposes; the flue gas cooled by the waste heat boiler is introduced into an electric precipitator and a bag filter to collect the flue dust to achieve a dust removal effect; the dust removed is then denitrated and desulfurized to meet qualified emission standards and discharged into the atmosphere.

[0090] Comparative Example 1

[0091] The method for preparing high nickel matte in this comparative example is different from that in Example 1 in that the ternary iron-aluminum slag is replaced by gypsum (CaSO 4 ·2H 2 O).

[0092] In this comparative example: gypsum (CaSO 4 ·2H 2 O) is composed of 32.6% CaO, 32.6% SO 3 46.5%、H 2 O20.9%. The chemical composition of sapropelic laterite nickel ore is: Ni 1.7%, Co 0.05%, Fe 34.9%, Mn 0.6%, Cr0.7%, S 0.1%, Al 3.8%, Ca 0.2%, Mg 23.7%, Si 28.8%, and others 5.45%.

[0093] (1) Drying: Gypsum (CaSO 4 ·2H 2 O) and saprolitic laterite nickel ore were respectively sent to a rotary kiln for drying at 300°C for 3h. Gypsum (CaSO 4 ·2H 2 O) and the laterite nickel ore in the sapropelic layer were dried to 10%. After drying, gypsum (CaSO 4 ·2H 2 O) on gypsum (CaSO 4 ·2H 2 O) Material silo for storage, the saprolitic layer laterite nickel ore is placed in the saprolitic layer laterite nickel mineral silo for storage.

[0094] (2) Mixing ingredients and granulating:

[0095] Mix the ingredients: mix the gypsum (CaSO 4 ·2H 2 O) and sapropelite laterite nickel ore were crushed and screened respectively, and gypsum (CaSO 4 ·2H 2 O) and sapropelite laterite nickel ore are sieved to 3 mm, and the reducing agent particle size is required to be 1 mm. In this embodiment, flux 1 is quartz sand, and the reducing agent is blue charcoal; gypsum (CaSO 4 ·2H 2 O), saprolitic laterite nickel ore, quartz sand and semi-coke were mixed in a mass ratio of 20:50:4:2.5, and gypsum (CaSO 4 ·2H 2 O), the sapropel layer laterite nickel ore, quartz sand and blue carbon are mixed evenly to obtain a fine-grained mixed material with a particle size of 4 mm.

[0096] Granulation: The fine-grained mixed material obtained in step (2) is granulated to obtain coarse-grained mixed granules with a particle size of 10 mm. The purpose is to prevent the mixed granules entering the side-blown furnace from being too fine, causing most of the material to enter the smoke and dust, resulting in certain losses.

[0097] (3) Reduction sulfidation smelting: The coarse-grained mixed pellets obtained in step (2) are fed into a side-blown furnace for reduction sulfidation smelting at a smelting temperature of 1300°C for 30 minutes. After natural cooling, low-nickel matte and smelting slag are obtained, and a portion of flue gas 1 is generated. The low-nickel matte product contains the following components in mass percentage: Ni 6%, Co 0.05%, Fe 65%, S26%, the nickel direct recovery rate is 80%, and the cobalt direct recovery rate is 84%. The obtained smelting slag contains the following components in mass percentage: Ni 0.2%, Co 0.04%, Mn 0.4%, FeO 36%, CaO 12%, SiO 2 29%, Al 2 O 3 10%, MgO 11%, others 1.36%.

[0098] (4) Blowing: The low nickel matte obtained in step (3) is mixed evenly with flux 2 in a certain mass ratio, wherein the mass ratio of flux 2 to low nickel matte is (10):50. After being evenly mixed, it is sent into a side-blown furnace and blown with compressed air. The compressed air supply rate is 10000L / h, the blowing temperature is 1350℃, the smelting is 60min, and after natural cooling, a high nickel matte product, blowing slag and a part of flue gas are obtained. Among them, the high nickel matte product contains the following components in mass percentage: Ni 28%, Co0.8%, Fe 42%, S28%, the nickel direct recovery rate is 85%, and the cobalt direct recovery rate is 88%; the obtained blowing slag contains the following components in mass percentage: Ni 2%, Co 1.3%, Mn 1.8%, FeO 40%, CaO 8%, SiO 2 31%, Al 2 O 3 7%, MgO 8%, others 0.9%.

[0099] (5) Secondary reduction sulfidation smelting / secondary blowing:

[0100] In this comparative example, one of the following two methods can be used. For the convenience of comparison, both methods of this comparative example are compared and implemented:

[0101] The blown slag obtained in step (4) is returned to the oxygen-enriched side-blowing furnace for secondary reduction sulfidation smelting to obtain low-nickel matte, smelting slag, and flue gas 1, and flux 2 is added to the low-nickel sulfur for blowing, wherein the mass ratio of flux 2 to low-nickel matte is 10:50. After the blowing is completed, high-nickel matte, blown slag, and a portion of flue gas 2 are obtained as products.

[0102] Alternatively, the blown slag obtained in step (4) is mixed with flux 2 in a certain mass ratio, wherein the mass ratio of flux 2 to blown slag is 5:50. The mixed materials are returned to the side-blowing furnace for secondary blowing to obtain high-nickel matte, blown slag, and a portion of flue gas 2.

[0103] (6) Water quenching of smelting slag: The smelting slag obtained in step (5) is subjected to water quenching treatment to obtain water-quenched slag. The water-quenched slag meets the technical specifications for external sale and can be sold externally.

[0104] (7) Waste heat recovery: The flue gas 1 obtained in step (3) and step (5) and the flue gas 2 obtained in step (4) and step (5) are respectively introduced into a waste heat boiler for cooling to recover waste heat. A large amount of steam generated by cooling can be used for power generation or other production purposes; the flue gas cooled by the waste heat boiler is introduced into an electric precipitator and a bag filter to collect the flue dust to achieve a dust removal effect; the dust removed is then denitrated and desulfurized to meet qualified emission standards and discharged into the atmosphere.

[0105] In Examples 1-3 of the present disclosure, ternary iron-aluminum slag is combined with laterite nickel ore to prepare high-nickel matte, so that the nickel and cobalt in the ternary iron-aluminum slag enter the high-nickel matte, which not only improves the grade of nickel and cobalt in the nickel matte, but also enables the valuable metals such as nickel and cobalt in the ternary iron-aluminum slag to be effectively recycled, while other impurity elements (manganese, aluminum, calcium, magnesium, silicon, etc.) enter the smelting slag to be solidified. Combining the ternary iron-aluminum slag with laterite nickel ore can synergistically realize the resource utilization of the ternary iron-aluminum slag, effectively reduce the stockpile of the ternary iron-aluminum slag, and reduce pollution to the land.

[0106] In Examples 1-3 of the present disclosure, relative to Comparative Example 1, ternary iron-aluminum slag is used to replace gypsum (CaSO 4 ·2H 2 O) As a sulfiding agent in the reduction sulfidation smelting process, the ternary iron-aluminum slag can be reused to reduce the process production cost, and the ternary iron-aluminum slag can improve the grade of nickel and cobalt in nickel matte, which has certain beneficial effects.

[0107] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present disclosure, and the present disclosure is also intended to include these modifications and modifications.

Claims

1. A method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore, characterized in that: The following steps are involved: (1) Drying: Drying the ternary iron-aluminum slag and the laterite-nickel ore separately, so that the moisture content of the ternary iron-aluminum slag is dried to 10% to 15%, and the moisture content of the laterite-nickel ore is dried to 10% to 15%; The ternary iron-aluminum slag comprises the following components in mass fraction: Ni 2.1% to 2.6%, Co 1.3% to 1.5%, Mn 1.0% to 1.2%, Fe 22.9% to 23.4%, S29.8% to 30.4%, Al 15.4% to 15.9%, P5.2% to 5.7%, Ca10.7% to 11.2%, Mg 6.0% to 6.9%, Si 0.2% to 0.3%, and other components 0.9% to 5.4%; (2) mixing and granulating: uniformly mixing the dried ternary iron-aluminum slag, laterite nickel ore, the first flux and the reducing agent, and granulating to obtain mixed granules; The mass ratio of the ternary iron-aluminum slag, laterite nickel ore, the first flux and the reducing agent is (20-50):50:(4-7):(2.5-4); (3) Reduction sulfidation smelting: the mixed pellets obtained in step (2) are fed into a side-blown furnace for reduction sulfidation smelting to obtain low-nickel matte, smelting slag and first flue gas; (4) Blowing: The low-nickel matte obtained in step (3) is evenly mixed with the second flux and then sent to a side-blown furnace for blowing to obtain high-nickel matte, blowing slag and second flue gas.

2. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 1, characterized in that: In step (1), the laterite nickel ore includes the following components in mass fraction: Ni 1.7%-1.8%, Co 0.05%-0.08%, Mn 0.6%-0.8%, Cr 0.7%-1.0%, Fe 34.9%-35.9%, S 0.1%-0.2%, Al 3.8%-4.2%, Ca 0.2%-0.8%, Mg 23.7%-24.1%, Si 28.8%-29.5%, and other components 1.62%-5.45%.

3. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 1, characterized in that: In step (1), the ternary iron-aluminum slag and laterite-nickel ore are respectively sent to a rotary kiln for drying at 100° C. to 300° C. for 3 h to 7 h.

4. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 1, characterized in that: In step (2), before mixing, the ternary iron-aluminum slag and laterite nickel ore dried in step (1) are crushed and sieved respectively, and the ternary iron-aluminum slag and laterite nickel ore are sieved to 3 mm to 5 mm respectively; the particle size of the reducing agent is 1 mm to 2 mm; the ternary iron-aluminum slag, laterite nickel ore, the first flux and the reducing agent are evenly mixed to obtain a mixed material with a particle size of 4 mm to 6 mm, and then the mixed material is granulated to obtain a mixed granular material with a particle size of 10 to 15 mm.

5. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 1, characterized in that: The reducing agent is at least one of pulverized coal, semi-coke, reduced coal and coke.

6. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 1, characterized in that: In step (3), the smelting temperature is 1300° C. to 1600° C., and the smelting time is 30 to 60 minutes.

7. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 1, characterized in that: The low nickel matte obtained in step (3) contains the following components in mass percentage: Ni 10%-28%, Co 0.2%-0.3%, Fe 50%-70%, S19%-21%; the smelting slag obtained in step (3) contains the following components in mass percentage: Ni 0.09%-0.2%, Co 0.01%-0.04%, Mn 0.2%-0.5%, FeO 35%-40%, CaO 10%-13%, SiO2 28%-34%, Al2O3 10%-15%, MgO 10%-16%.

8. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 1, characterized in that: In step (4), the mass ratio of the second flux to the low nickel matte is (10-15):

50.

9. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 1, characterized in that: In step (4), the blowing temperature is 1350°C to 1500°C, and the blowing time is 60 to 120 minutes.

10. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 1, characterized in that: The high nickel matte obtained in step (4) contains the following components in mass percentage: Ni 40%-61%, Co 1.3%-2.4%, Fe 7%-38%, S20%-28%; the blowing slag obtained in step (4) contains the following components in mass percentage: Ni 1.5%-3.3%, Co 0.5%-1.5%, Mn 1.2%-2.0%, FeO 38%-43%, CaO 7%-11%, SiO2 30%-36%, Al2O3 7%-10%, MgO 8%-12%.

11. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 1, characterized in that: In step (4), the low nickel matte is mixed with the second flux and then sent to the side blowing furnace and blown by compressed air. The compressed air supply rate is 10000Nm 3 / h~20000Nm 3 / h.

12. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 1, characterized in that: In step (2), the first flux is at least one of quartz sand and limestone; in step (4), the second flux is at least one of quartz sand and limestone.

13. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 1, characterized in that: The following steps are also included: (5) Secondary reduction sulfidation smelting / secondary blowing: The blown slag obtained in step (4) is subjected to secondary reduction sulfidation smelting to obtain low-nickel matte, smelting slag, and a first flue gas, and a second flux is added to the low-nickel sulfur for blowing to obtain high-nickel matte, blowing slag, and a second flue gas; or the blown slag obtained in step (4) is mixed with the second flux and subjected to secondary blowing to obtain high-nickel matte, blowing slag, and a second flue gas.

14. The method for preparing high nickel matte by using ternary iron aluminum slag and laterite nickel ore according to claim 13, characterized in that: The following steps are also included: (6) quenching the smelting slag: quenching the smelting slag obtained in step (3) and step (5) to obtain water-quenched slag, which is recycled; (7) Waste heat recovery: The first flue gas obtained in step (3) and step (5) and the second flue gas obtained in step (4) and step (5) are respectively introduced into a waste heat boiler for cooling to recover waste heat.

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