A method for sintering system adding high-moisture laterite nickel ore

Abstract

This invention belongs to the field of sintering technology, and particularly relates to a method for adding high-moisture laterite nickel ore to a sintering system. The method includes: laterite nickel ore pretreatment: manually or mechanically selecting the incoming laterite nickel ore to remove stones larger than 100mm in diameter, as well as impurities such as plastics and woven bags, to prevent large hard objects from damaging the batching equipment and to reduce the mixing of ineffective components, resulting in refined laterite nickel ore; mixture preparation: uniformly mixing the refined laterite nickel ore, lime, converter coarse particles, and blast furnace return ore to obtain a mixture; blending: adding the mixture as a component of the blended ore to obtain a blended ore. This invention uses a triple synergistic dehydration process of "chemical-thermal-physical" to reduce the moisture content of the laterite nickel ore to 8%–12%, meeting the batching requirements. It simultaneously disposes of solid waste such as lime, converter dust, and blast furnace return ore, eliminating secondary pollution and reducing batching costs.

Description

Technical Field

[0001] This invention belongs to the field of sintering technology, and particularly relates to a method for adding high-moisture laterite nickel ore to a sintering system. Background Technology

[0002] Laterite nickel ore is an important raw material for iron and nickel smelting. Adding laterite nickel ore to sintering production can broaden the source of iron and reduce the cost of blending. However, the laterite nickel ore arriving at the plant generally has high moisture content (usually 33%–35%) and high stone content (mixtures of stones and impurities), making it unsuitable for direct participation in the blending process. High moisture content leads to uncontrolled overall moisture in the blended ore, which in turn worsens the granulation effect and reduces the permeability of the sintering bed. Large stones and impurities can damage the batching equipment and conveyor belts, causing batching interruptions, fluctuations in the composition of the sinter, and significantly adversely affecting stable production.

[0003] Currently, the conventional methods for processing high-moisture, viscous minerals are to construct drying kilns or use hot air furnaces for forced drying. However, these methods involve large infrastructure investments, high energy consumption, and require significant land area. Furthermore, laterite nickel ore is highly viscous and prone to agglomeration during drying, which increases the burden on subsequent crushing and screening processes and reduces overall operational efficiency. Some companies have attempted natural sun-drying, but this method is time-consuming, highly susceptible to weather conditions, and difficult to meet the needs of large-scale continuous production.

[0004] On the other hand, steel enterprises generate various secondary recyclable materials with waste heat resources or reactivity during production, such as converter slag, blast furnace return ore, and dust collector ash. If the physicochemical properties of these materials can be rationally utilized to co-process high-moisture lateritic nickel ore, it is hoped that not only can the goal of "treating waste with waste" be achieved, but the internal resource utilization of solid waste can also be promoted simultaneously. However, currently, there is a lack of a systematic, feasible process that does not require the addition of large-scale drying equipment, which can effectively couple the advantages of the aforementioned recycled materials with the dehydration requirements of lateritic nickel ore, thereby achieving its stable introduction into the sintering system under low-cost and low-input conditions.

[0005] Therefore, developing a process that can efficiently solve the problem of high water content in laterite nickel ore without requiring additional drying facilities and can make full use of existing recycled materials and equipment in the plant is of great engineering application value and urgent need. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, the purpose of this invention is to provide a method for adding high-moisture lateritic nickel ore to a sintering system. This method does not require the addition of any drying kiln, hot blast stove, or supporting water supply and drainage facilities. It only utilizes the secondary recycling yard and conventional loading and transportation equipment in the steel plant. By rationally combining three recycled materials—lime, converter coarse particles, and blast furnace return ore—the apparent moisture of the lateritic nickel ore is removed online through their hygroscopic and exothermic effects, high-temperature sensible heat, and drying and dilution effects, so that it meets the moisture requirements for blending ore and can be successfully added to the sintering system.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A method for adding high-moisture laterite nickel ore to a sintering system includes the following steps: 1) Pre-treatment of laterite nickel ore: The laterite nickel ore entering the plant is sorted manually or mechanically to remove stones with a particle size greater than 100mm and debris such as plastic and woven bags, in order to prevent large hard objects from damaging the batching equipment and reduce the mixing of ineffective components, so as to obtain refined laterite nickel ore. 2) Preparation of mixture: Select at least three of the following: laterite nickel ore, lime, converter coarse particles, and blast furnace return ore, and mix them evenly in a mass ratio of 1:(0~3):(0~3):(1~3) to obtain the mixture; 3) Mixing and blending: The mixture is transferred to the mixing and blending tank and added as a component of the mixing and blending to obtain the mixed and blended ore.

[0008] Furthermore, the lime is quicklime with a particle size of <5mm and a CaO content of ≥80wt%.

[0009] Furthermore, the temperature of the converter coarse particles is 60–300°C.

[0010] Furthermore, the blast furnace return ore is sintered ore undersize, and the moisture content of the blast furnace return ore is ≤0.8%.

[0011] Furthermore, the mixing in step 2) involves repeatedly turning and stirring the mixture using a forklift.

[0012] Furthermore, the moisture content of the mixture obtained in step 2) is 8% to 12%.

[0013] Furthermore, the mixture described in step 3) accounts for 10% to 20% of the total mass of the blended ore.

[0014] The reasons for selecting the raw materials in this invention are as follows: Synergistic dehydration effect is achieved by utilizing the different properties of the three recycled materials: The lime is quicklime, which rapidly digests to form Ca(OH)2 when it comes into contact with water in laterite nickel ore. This chemical reaction absorbs water by its own mass and releases heat at the same time, raising the temperature of the mixture to 60-100℃. Heating the ore promotes the evaporation of moisture. The converter coarse particles are converter dust from the converter flue gas dust removal system. The temperature is maintained at 60-300℃. The large amount of sensible heat they carry directly heats the mixture, causing the moisture to escape in the form of steam. At the same time, they are dry particles, which directly dilute the moisture content of the mixture. Blast furnace return ore is a screened material of sintered ore with extremely low moisture content. When added as a dry base material, it physically reduces the average moisture content of the entire mixture system.

[0015] The combined effects of the three materials—chemical hygroscopic and heat-releasing quicklime, physical heat transfer and evaporation of converter dust, and physical drying and dilution of blast furnace return ore—form a triple dehydration mechanism of "chemical-thermal-physical." During the overturning process by the loader, the material continuously exposes new surfaces, accelerating the dissipation of moisture, ultimately reducing the moisture content of the mixture from the initial 33%–35% to 8%–12%, fully meeting the requirements for blending ore.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention constructs a triple dehydration mechanism of "chemical-thermal-physical": for the first time, it couples the chemical hygroscopic and exothermic properties of quicklime, the high-temperature sensible heat of converter coarse particles, and the ultra-low moisture drying characteristics of blast furnace return ore, allowing them to act simultaneously in the same mixing process. The dehydration efficiency is far higher than that of single sun-drying or single addition of desiccant. No external heat source is required, enabling rapid online dehydration of high-moisture lateritic nickel ore at room temperature / low temperature.

[0017] 2. This invention utilizes waste to treat waste, achieving simultaneous resource recovery of four materials: It uses existing recycled materials from the sintering area (lime, converter dust, and blast furnace return ore) to treat difficult-to-use laterite nickel ore, solving not only the problem of laterite nickel ore addition but also promoting internal recycling of solid waste. After dehydration, the lime can be directly used as a sintering flux, and beneficial elements such as iron, calcium, and magnesium from the converter coarse particles enter the sinter, generating no secondary waste.

[0018] 3. This invention features a simple process with zero infrastructure investment, making it suitable for rapid industrial deployment: The operation involves only three steps: "sorting and removing impurities—forklift turning and mixing—adding materials to the batching tank." It is easy to operate and maintain, requiring minimal operator skills. The entire process utilizes only existing secondary recycling yards, forklifts, and conventional batching systems, without adding any drying equipment, hot air furnaces, or water supply and drainage facilities. There are no complex automatic control requirements, making operation simple and maintenance convenient. Compared to building a drying line, it saves on equipment and site investment, and also significantly reduces gas / electricity consumption. Attached Figure Description

[0019] Figure 1 This is a process flow diagram of the present invention. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0021] Example 1:

[0022] See Figure 1 The method for adding high-moisture laterite nickel ore to the sintering system includes the following steps: 1) A batch of laterite nickel ore arrived at the sintering workshop of a steel plant. The moisture content was 33.5%, the stone content was about 12%, and visible stones with a diameter of 100-250mm and a small amount of woven bag debris were present. First, manual sorting was carried out in the unloading area to remove all visible large stones and debris, which were then loaded onto trucks and transported away for disposal. The moisture content of the sorted laterite nickel ore was still 33.5%, but there were no longer any large harmful materials.

[0023] 2) Prepare the following three materials: Quicklime: derived from converter screened lime and other recycled waste lime on site, with CaO content of 85.5wt% and particle size <5mm, stored in the silo for later use; Converter coarse particles: Converter dust collected at a temperature of 150±2℃, with a particle diameter of 1-10mm and a moisture content of 0.5%; Blast furnace return ore: Sintered ore undersize return ore, with a moisture content of 0.6% and a particle size of 0-5mm.

[0024] 3) In the secondary recycling yard, a 5m×5m area was designated. Using a loader, the four materials mentioned above were taken in a mass ratio of 1:1:1:1, with 2.5 tons of each material in each batch, totaling 10 tons. The mixture was first spread into strips using the loader, then turned over 5-6 times. Each turning resulted in visible steam rising, indicating significant heat from the quicklime digestion. The mixture was continued until it was a uniform yellowish-brown color, free of white clumps and obvious wet lumps. A sample test showed a moisture content of 3.8%. This mixture met the feeding requirements and was successfully fed into the blending and batching system.

[0025] 4) The blending and batching system incorporates this mixture at a ratio of 15% of its total mass, with the remainder consisting of conventional iron concentrate, imported ore powder, limestone, fuel, etc. Initially, the daily addition was 120 tons. After one week of continuous operation, the sintering machine's negative pressure, exhaust gas temperature, and yield all stabilized, subsequently increasing the daily addition to 300 tons. Throughout the process, the overall moisture content of the blended ore was controlled between 7.6% and 8.1%, resulting in good granulation and no significant decline in sintered ore indicators. The usage of laterite nickel ore over three consecutive months was 3170 tons. Compared to local mines, the cost-effectiveness was 125 yuan / ton based on the main element caliber, reducing blending costs by approximately 396,200 yuan (3170*125 / 10000).

[0026] Example 2:

[0027] A method for adding high-moisture laterite nickel ore to a sintering system includes the following steps: 1) A batch of laterite nickel ore arrived at the sintering workshop of a steel plant. The moisture content was 33.5%, the stone content was about 12%, and visible stones with a diameter of 100-250mm and a small amount of woven bag debris were present. First, manual sorting was carried out in the unloading area to remove all visible large stones and debris, which were then loaded onto trucks and transported away for disposal. The moisture content of the sorted laterite nickel ore was still 33.5%, but there were no longer any large harmful materials.

[0028] 2) Prepare the following two materials: Quicklime: derived from converter screened lime and other recycled waste lime on site, with CaO content of 85.5wt% and particle size <5mm, stored in the silo for later use; Blast furnace return ore: Sintered ore undersize return ore, with a moisture content of 0.6% and a particle size of 0-5mm.

[0029] 3) In the secondary recycling yard, a 5m x 5m area was designated. Using a loader, selected laterite nickel ore, lime, and blast furnace return ore were taken in a mass ratio of 1:2:1, with 5 tons of lime and 2.5 tons of each of the other materials per batch, totaling 10 tons. The mixture was first spread into strips using the loader, then turned over 5-6 times. Each turning resulted in visible steam rising, indicating significant heat from the quicklime digestion. The mixture was continued until it was a uniform yellowish-brown color, free of white clumps and obvious wet lumps. A sample test showed a moisture content of 3.5%. This mixture met the feeding requirements and was successfully fed into the blending and batching system.

[0030] 4) The blending and batching system incorporates this mixture at a ratio of 15% of its total mass, with the remainder consisting of conventional iron concentrate, imported ore powder, limestone, fuel, etc. Initially, the daily addition was 130 tons. After one week of continuous operation, the sintering machine's negative pressure, exhaust gas temperature, and yield all stabilized. Subsequently, the addition was increased to 330 tons per day. Throughout the process, the overall moisture content of the blended ore was controlled between 7.7% and 8.1%, resulting in good granulation and no significant decline in sintered ore indicators.

[0031] Example 3:

[0032] A method for adding high-moisture laterite nickel ore to a sintering system includes the following steps: 1) A batch of laterite nickel ore arrived at the sintering workshop of a steel plant. The moisture content was 33.5%, the stone content was about 12%, and visible stones with a diameter of 100-250mm and a small amount of woven bag debris were present. First, manual sorting was carried out in the unloading area to remove all visible large stones and debris, which were then loaded onto trucks and transported away for disposal. The moisture content of the sorted laterite nickel ore was still 33.5%, but there were no longer any large harmful materials.

[0033] 2) Prepare the following two materials: Quicklime: from waste lime recovered from converter screens and other on-site materials, with a CaO content of 85.5wt% and a particle size of <5mm, stored in a silo for later use; Converter coarse particles: Converter dust obtained from the converter dust removal system, with a temperature of 150±2℃, a particle diameter of 1~10mm, and a moisture content of 0.5%.

[0034] 3) In the secondary recycling yard, a 5m×5m area was designated. Using a loader, selected laterite nickel ore, lime, and converter coarse particles were taken in a mass ratio of 1:2:1, with 5 tons of lime and 2.5 tons of each of the other materials per batch, totaling 10 tons. The mixture was first spread into strips using the loader, then turned over 5-6 times. Each turning resulted in visible steam rising, indicating significant heat from the quicklime digestion. The mixture was continued until it was a uniform yellowish-brown color, free of white clumps and obvious wet lumps. A sample test showed a moisture content of 3.3%. This mixture met the feeding requirements and was successfully fed into the blending and batching system.

[0035] 4) The blending and batching system incorporates this mixture at a ratio of 15% of its total mass, with the remainder consisting of conventional iron concentrate, imported ore powder, limestone, fuel, etc. Initially, the daily addition was 150 tons. After one week of continuous operation, the sintering machine's negative pressure, exhaust gas temperature, and yield all stabilized. Subsequently, the addition was increased to 350 tons per day. Throughout the process, the overall moisture content of the blended ore was controlled between 7.5% and 8.0%, resulting in good granulation and no significant decline in sintered ore indicators.

[0036] Example 4:

[0037] A method for adding high-moisture laterite nickel ore to a sintering system includes the following steps: 1) A batch of laterite nickel ore arrived at the sintering workshop of a steel plant. The moisture content was 33.5%, the stone content was about 12%, and visible stones with a diameter of 100-250mm and a small amount of woven bag debris were present. First, manual sorting was carried out in the unloading area to remove all visible large stones and debris, which were then loaded onto trucks and transported away for disposal. The moisture content of the sorted laterite nickel ore was still 33.5%, but there were no longer any large harmful materials.

[0038] 2) Prepare the following two materials: Quicklime: derived from converter screened lime and other recycled waste lime on site, with CaO content of 85.5wt% and particle size <5mm, stored in the silo for later use; Converter coarse particles: Converter dust, temperature 150±2℃, particle diameter 1~10mm, moisture 0.5%.

[0039] 3) In the secondary recycling yard, a 5m×5m area was designated. Using a loader, selected laterite nickel ore, lime, and converter coarse particles were taken in a mass ratio of 1:1:2, with each batch containing 5 tons of converter coarse particles and 2.5 tons of each of the other materials, totaling 10 tons. The mixture was first spread into strips using the loader, then turned over 5-6 times. Each turning resulted in visible steam rising, indicating significant heat from the quicklime digestion. The mixture was continued until it was a uniform yellowish-brown color, free of white clumps and obvious wet lumps. A sample test showed a moisture content of 3.6%. This mixture met the feeding requirements and was successfully fed into the blending and batching system.

[0040] 4) The blending and batching system incorporates this mixture at a ratio of 15% of its total mass, with the remainder consisting of conventional iron concentrate, imported ore powder, limestone, fuel, etc. Initially, the daily addition was 140 tons. After one week of continuous operation, the sintering machine's negative pressure, exhaust gas temperature, and yield all stabilized. Subsequently, the addition was increased to 340 tons per day. Throughout the process, the overall moisture content of the blended ore was controlled between 7.5% and 8.1%, resulting in good granulation and no significant decline in sintered ore indicators.

[0041] Example 5:

[0042] A method for adding high-moisture laterite nickel ore to a sintering system includes the following steps: 1) A batch of laterite nickel ore arrived at the sintering workshop of a steel plant. The moisture content was 33.5%, the stone content was about 12%, and visible stones with a diameter of 100-250mm and a small amount of woven bag debris were present. First, manual sorting was carried out in the unloading area to remove all visible large stones and debris, which were then loaded onto trucks and transported away for disposal. The moisture content of the sorted laterite nickel ore was still 33.5%, but there were no longer any large harmful materials.

[0043] 2) Prepare the following three materials: Quicklime: derived from converter screened lime and other recycled waste lime on site, with CaO content of 85.5wt% and particle size <5mm, stored in the silo for later use; Converter coarse particles: Converter dust, temperature 148-152℃, particle diameter 1-10mm, moisture content 0.5%; Blast furnace return ore: Sintered ore undersize return ore, with a moisture content of 0.6% and a particle size of 0-5mm.

[0044] 3) In the secondary recycling yard, a 5m×5m area was designated. Using a loader, the four materials—selected laterite nickel ore, lime, converter coarse particles, and blast furnace return ore—were taken in a mass ratio of 1:1:1.5:1.5, resulting in 2.5 tons of selected laterite nickel ore, 2.5 tons of lime, 3.75 tons of converter coarse particles, and 3.75 tons of blast furnace return ore, totaling 12.5 tons. The mixture was first spread into strips using the loader, then turned over 5-6 times. Each turning resulted in visible steam rising, indicating significant heat from the quicklime digestion. The mixture was continued until it was a uniform yellowish-brown color, free of white clumps and obvious wet lumps. A sample test showed a moisture content of 3.7%. This four-in-one mixture met the feeding requirements and was successfully fed into the blending and batching system.

[0045] 4) The blending and batching system incorporates this four-in-one mixture at a ratio of 15% of the total mass, with the remainder consisting of conventional iron concentrate, imported ore powder, limestone, fuel, etc. Initially, the daily addition was 125 tons. After one week of continuous operation, the sintering machine's negative pressure, exhaust gas temperature, and yield all stabilized. Subsequently, the addition was increased to 310 tons per day. Throughout the process, the overall moisture content of the blended ore was controlled between 7.6% and 8.0%, resulting in good granulation and no significant decline in sintered ore indicators.

[0046] Example 6:

[0047] A method for adding high-moisture laterite nickel ore to a sintering system includes the following steps: 1) A batch of laterite nickel ore arrived at the sintering workshop of a steel plant. The moisture content was 33.5%, the stone content was about 12%, and visible stones with a diameter of 100-250mm and a small amount of woven bag debris were present. First, manual sorting was carried out in the unloading area to remove all visible large stones and debris, which were then loaded onto trucks and transported away for disposal. The moisture content of the sorted laterite nickel ore was still 33.5%, but there were no longer any large harmful materials.

[0048] 2) Prepare the following three materials: Quicklime: derived from converter screened lime and other recycled waste lime on site, with CaO content of 85.5wt% and particle size <5mm, stored in the silo for later use; Converter coarse particles: Converter dust, temperature 148-152℃, particle diameter 1-10mm, moisture content 0.5%; Blast furnace return ore: Sintered ore undersize return ore, with a moisture content of 0.6% and a particle size of 0-5mm.

[0049] 3) In the secondary recycling yard, a 5m × 5m area was designated. Using a loader, the four materials—selected laterite nickel ore, lime, converter coarse particles, and blast furnace return ore—were taken in a mass ratio of 1:1.5:1:2, resulting in 2.5 tons of selected laterite nickel ore, 3.75 tons of lime, 2.5 tons of converter coarse particles, and 5 tons of blast furnace return ore, totaling 13.75 tons. The mixture was first spread into strips using the loader, then turned over 5-6 times. Each turning resulted in visible steam rising, indicating significant heat from the quicklime digestion. The mixture was continued until it was a uniform yellowish-brown color, free of white clumps and obvious wet lumps. A sample test showed a moisture content of 3.7%. This four-in-one mixture met the feeding requirements and was successfully fed into the blending and batching system.

[0050] 4) The blending and batching system incorporates this four-in-one mixture at a ratio of 15% of the total mass, with the remainder consisting of conventional iron concentrate, imported ore powder, limestone, fuel, etc. Initially, the daily addition was 135 tons. After one week of continuous operation, the sintering machine's negative pressure, exhaust gas temperature, and yield all stabilized. Subsequently, the addition was increased to 320 tons per day. Throughout the process, the overall moisture content of the blended ore was controlled between 7.5% and 7.9%, resulting in good granulation and no significant decline in sintered ore indicators.

[0051] Example 7:

[0052] A method for adding high-moisture laterite nickel ore to a sintering system includes the following steps: 1) A batch of laterite nickel ore arrived at the sintering workshop of a steel plant. The moisture content was 33.5%, the stone content was about 12%, and visible stones with a diameter of 100-250mm and a small amount of woven bag debris were present. First, manual sorting was carried out in the unloading area to remove all visible large stones and debris, which were then loaded onto trucks and transported away for disposal. The moisture content of the sorted laterite nickel ore was still 33.5%, but there were no longer any large harmful materials.

[0053] 2) Prepare the following three materials: Quicklime: derived from converter screened lime and other recycled waste lime on site, with CaO content of 85.5wt% and particle size <5mm, stored in the silo for later use; Converter coarse particles: Converter dust, temperature 148-152℃, particle diameter 1-10mm, moisture content 0.5%; Blast furnace return ore: Sintered ore undersize return ore, with a moisture content of 0.6% and a particle size of 0-5mm.

[0054] 3) In the secondary recycling yard, a 5m×5m area was designated. Using a loader, the four materials—selected laterite nickel ore, lime, converter coarse particles, and blast furnace return ore—were taken in a mass ratio of 1:2:1.5:1.5, resulting in 2.5 tons of selected laterite nickel ore, 5 tons of lime, 3.75 tons of converter coarse particles, and 3.75 tons of blast furnace return ore, totaling 15 tons. The mixture was first spread into strips using the loader, then turned over 5-6 times. Each turning resulted in visible steam rising, indicating significant heat from the quicklime digestion. The mixture was continued until it was a uniform yellowish-brown color, free of white clumps and obvious wet lumps. A sample test showed a moisture content of 3.5%. This four-in-one mixture met the feeding requirements and was successfully fed into the blending and batching system.

[0055] 4) The blending and batching system incorporates this four-in-one mixture at a ratio of 15% of the total mass, with the remainder consisting of conventional iron concentrate, imported ore powder, limestone, fuel, etc. Initially, the daily addition was 145 tons. After one week of continuous operation, the sintering machine's negative pressure, exhaust gas temperature, and yield all stabilized. Subsequently, the addition was increased to 350 tons per day. Throughout the process, the overall moisture content of the blended ore was controlled between 7.4% and 7.8%, resulting in good granulation, and no significant decline in sintered ore indicators.

[0056] Compared with Example 1, Examples 2-7 all achieved dehydration effects that met the on-site feeding requirements, but there was a shortage of materials. After comprehensive evaluation, Example 1 was more practical and met the on-site requirements. Using the method of this invention, the initial daily addition of laterite nickel ore was 120-150 tons. After the sintering process and equipment operation stabilized, the amount was gradually increased to 300-350 tons per day. The mixed ore was then homogenized, granulated, and fed into the sintering machine for sintering.

Claims

1. A method for adding high-moisture laterite nickel ore to a sintering system, characterized in that, Includes the following steps: 1) Pre-treatment of laterite nickel ore: The laterite nickel ore entering the plant is sorted manually or mechanically to remove stones and impurities with a particle size greater than 100mm, so as to obtain refined laterite nickel ore; 2) Preparation of mixture: Select at least three of the following: laterite nickel ore, lime, converter coarse particles, and blast furnace return ore, and mix them evenly in a mass ratio of 1:(0~3):(0~3):(1~3) to obtain the mixture; The temperature of the coarse particles in the converter is 60–300°C; 3) Mixing and blending: The mixture is transferred to the mixing and blending tank and added as a component of the mixing and blending to obtain the mixed and blended ore.

2. The method for adding high-moisture laterite nickel ore to a sintering system according to claim 1, characterized in that, The lime is quicklime with a particle size of <5mm and a CaO content of ≥80wt%.

3. The method for adding high-moisture laterite nickel ore to a sintering system according to claim 1, characterized in that, The blast furnace return ore is sintered ore undersize, and the moisture content of the blast furnace return ore is ≤0.8%.

4. The method for adding high-moisture laterite nickel ore to a sintering system according to claim 1, characterized in that, Step 2) involves mixing by repeatedly turning and stirring the mixture with a forklift.

5. The method for adding high-moisture laterite nickel ore to a sintering system according to claim 1, characterized in that, The moisture content of the mixture obtained in step 2) is 8% to 12%.

6. The method for adding high-moisture laterite nickel ore to a sintering system according to claim 1, characterized in that, The mixture mentioned in step 3) accounts for 10% to 20% of the total mass of the blended ore.

Images