A method and system for producing high-titanium high-magnesium oxide pellets

Abstract

The application discloses a production method and system of high-titanium and high-magnesium oxidized pellet, and the method comprises the following steps: selecting a type of vanadium-titanium ore, a type of vanadium-titanium ore and laterite nickel ore as raw materials; collecting physical and chemical index parameters of the a type of vanadium-titanium ore, the a type of vanadium-titanium ore and the laterite nickel ore, calculating a proportioning ratio according to the physical and chemical index parameters, wherein the proportioning ratio comprises mass percentages of the a type of vanadium-titanium ore, the a type of vanadium-titanium ore, the laterite nickel ore and steelmaking dust sludge; and preparing a mixture according to the proportioning ratio; drying and roller grinding the mixture; adjusting and uniformly mixing bentonite according to the green ball quality; pelletizing the uniformly mixed mixture to form green balls; and roasting the green balls to form pellet. The application introduces the laterite nickel ore into the production of the high-titanium and high-magnesium oxidized pellet, improves the pelletizing performance and the roasting effect, and reduces the consumption of bentonite.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical engineering technology, and in particular relates to a method and system for producing high-titanium and high-magnesium oxide pellets. Background Technology

[0002] With the continuous development of the global steel industry, high-quality iron ore resources are becoming increasingly depleted. High-titanium and high-magnesium iron ore, such as vanadium-titanium magnetite in the Panzhihua-Xichang region of my country, has become a key alternative resource for the steel industry due to its abundant reserves. A significant characteristic of this type of iron ore is its TiO2 content of approximately 10% and MgO content of 1.5%-3%. However, during the production of oxidized pellets, TiO2 and MgO significantly increase the melting point of the ore powder, leading to insufficient liquid phase formation during the roasting stage, making it difficult for the pellets to meet industrial requirements for compressive strength. Simultaneously, the poor hydrophilicity of high-magnesium ore powder results in a pelletizing rate often below 70% and a green pellet drop strength of less than 7-8 times / 0.5m, severely restricting production efficiency and product quality.

[0003] On the other hand, laterite nickel ore, as one of the world's richest nickel-iron resources, has a low-grade ore content of about 0.5% Ni and about 50% TFe. Due to its low utilization value, laterite nickel ore has long been idle, while traditional utilization methods such as pyrometallurgical nickel-iron smelting have prominent problems of high energy consumption and high pollution. Summary of the Invention

[0004] The purpose of this invention is to provide a production method and system for high-titanium and high-magnesium oxide pellets, which partially solves or alleviates the above-mentioned deficiencies in the prior art, introduces laterite nickel ore into the production of high-titanium and high-magnesium oxide pellets, improves pelletizing performance and roasting effect, and reduces bentonite consumption.

[0005] To solve the aforementioned technical problems, the present invention specifically adopts the following technical solution: A first aspect of the present invention is to provide a method for producing high-titanium, high-magnesium oxide pellets, comprising: Vanadium-titanium ore of type I, type II, and laterite nickel ore were selected as raw materials for preparation. The physicochemical parameters of type I vanadium-titanium ore ranged from 55% to 56% TFe content, 10% to 11% TiO2 content, 2.3% to 2.4% MgO content, and 65% to 75% -200 mesh particle size. The physicochemical parameters of type II vanadium-titanium ore ranged from 59% to 60% TFe content, 7% to 8% TiO2 content, 1.9% to 2.0% MgO content, and 92.5% to 97.5% -200 mesh particle size. The physicochemical parameters of laterite nickel ore ranged from 49% to 50% TFe content, 18% to 22% total moisture, and 0.48% to 0.49% MgO content. Physicochemical parameters of Class I vanadium-titanium ore, Class II vanadium-titanium ore, and laterite nickel ore are collected. The proportion of ingredients is calculated based on the physicochemical parameters. The proportion of ingredients includes the mass percentage of Class I vanadium-titanium ore, Class II vanadium-titanium ore, laterite nickel ore, and steelmaking dust removal sludge. The mixture is then prepared according to the proportion of ingredients. The mixture is dried and then milled. Adjust the bentonite ratio according to the weight of the green pellets and mix thoroughly. The mixed material is pelletized to form green pellets; Raw pellets are roasted to form ore pellets.

[0006] Furthermore, let the mass percentage of Class I vanadium-titanium ore be x1, the mass percentage of Class II vanadium-titanium ore be x2, the mass percentage of laterite nickel ore be x3, and the mass percentage of steelmaking dust removal sludge be x4. Then we have x1 + x2 + x3 + x4 = 100%, and x3 ∈ [1%, 5%], x4 ∈ [1.5%, 2.5%].

[0007] Furthermore, the ingredient ratio is obtained by solving an objective function, which is: ; Among them, C 膨润土 The unit price of bentonite is m. 膨润土 For bentonite consumption per unit; C 燃料 Q represents the unit price of fuel. 热耗 Heat consumption per ton of ore; F 抗压强度 This refers to the compressive strength of the pellets.

[0008] Furthermore, the constraints of the objective function are as follows: , in, The drop strength of the raw ball. This represents the mass percentage of ferrous oxide in the mixture.

[0009] Furthermore, methods for solving the objective function include: Randomly generate N sets of ingredient ratios that meet the constraints as the initial population; Calculate the objective function value for the feed ratio of each group in the population; The optimal solution group is retained by sorting by non-dominated order and filtering by crowding. The optimal solution is output after a preset number of iterations.

[0010] Furthermore, methods for adjusting the bentonite ratio based on the weight of the green pellets include: If the drop strength of the raw pellets is less than 8 times / 0.5m, increase the bentonite ratio by 0.1%-0.3%; If the proportion of 10-14mm green pellets is less than 80%, increase the bentonite ratio by 0.05%-0.2% and adjust the moisture content of the mixture by ±0.15%. If the moisture content of the raw clay pellets is greater than 8.5% and they are sticking together, reduce the bentonite ratio by 0.1%-0.2%. If the green pellet drop strength is ≥8 times / 0.5m, the proportion of green pellets of 10-14mm is ≥80%, and the moisture content of green pellets is within the range of 7.5%-8.5%, the current bentonite mix ratio shall be maintained.

[0011] Furthermore, a pelletizing machine is used to pelletize the pellets, with a rotation speed of 8-10 r / min and a pelletizing time of 5-7 minutes.

[0012] Furthermore, the raw pellets are dried and preheated before roasting; the drying temperature is 300-400℃ and the drying time is 9-11 minutes; the preset temperature is 900-1050℃ and the preheating time is 13-17 minutes.

[0013] Furthermore, the green pellets are roasted using a rotary kiln, with the kiln head temperature around 1150-1250℃ and the kiln tail temperature around 850-950℃.

[0014] The present invention also provides a production system for high-titanium and high-magnesium oxide pellets, comprising: The raw material selection module is used to select Class I vanadium-titanium ore, Class II vanadium-titanium ore, and laterite nickel ore as raw materials. The physicochemical parameters of Class I vanadium-titanium ore range from 55%-56% TFe content, 10%-11% TiO2 content, 2.3%-2.4% MgO content, and 65-75% -200 mesh particle size. The physicochemical parameters of Class II vanadium-titanium ore range from 59%-60% TFe content, 7%-8% TiO2 content, 1.9%-2.0% MgO content, and 92.5-97.5% -200 mesh particle size. The physicochemical parameters of laterite nickel ore range from 49%-50% TFe content, 18%-22% total moisture, and 0.48%-0.49% MgO content. The ingredient ratio calculation module is used to collect the physicochemical parameters of Class I vanadium-titanium ore, Class II vanadium-titanium ore, and laterite nickel ore, calculate the ingredient ratio based on the physicochemical parameters, and the ingredient ratio includes the mass percentage of Class I vanadium-titanium ore, Class II vanadium-titanium ore, laterite nickel ore, and steelmaking dust removal sludge; and configure the mixed materials according to the ingredient ratio. The pretreatment module is used to dry and roll the mixture. The bentonite addition module is used to adjust the bentonite ratio and mix it evenly according to the weight of the green pellets. The pelletizing module is used to pelletize the mixed material into green pellets. The roasting module is used to roast green pellets to form ore pellets.

[0015] Beneficial effects: This invention realizes the resource utilization of low-grade lateritic nickel ore by co-producing long-term idle lateritic nickel ore with a Ni content of about 0.5% with high-titanium and high-magnesium vanadium-titanium ore. This not only makes use of idle resources but also compensates for the defects of poor pelletizing and insufficient roasting liquid phase of vanadium-titanium ore by leveraging its low MgO and natural moisture properties. The synergistic value of resources is outstanding. Based on the characteristics of vanadium-titanium ore resources in the Panxi region, the Taihe and Anning vanadium-titanium mines are selected to give full play to their complementary physicochemical properties, reduce dependence on high-quality iron ore, and meet the needs of regional resource development.

[0016] The solution introduces a multivariate adaptive batching algorithm to dynamically optimize the batching ratio based on the physicochemical data of the raw materials, replacing the fixed ratio. It can accurately adapt to fluctuations in moisture content of laterite nickel ore and TiO2 content of vanadium-titanium ore without manual intervention. A closed loop is constructed for green pellet quality feedback and bentonite ratio adjustment to solve the problems of binder waste or insufficient green pellet strength caused by traditional fixed ratios.

[0017] Through complementary raw materials, optimized processes, and intelligent adjustments, the quality of green pellets is stabilized, avoiding cracking and sticking during transportation and drying. The pellets exhibit excellent performance, with a final product compressive strength ≥2300N and FeO content ≤1.5%, meeting all core metallurgical standards. Bentonite consumption per unit area is reduced by 14%-25% year-on-year, recycled material loss is reduced by more than 20%, and the total cost per ton of ore is reduced by ≥3.2 yuan, with an estimated annual cost reduction of ≥5.6 million yuan, more than doubling the cost reduction compared to traditional methods. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale. Obviously, the drawings described below are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0019] Figure 1 This is a flowchart of Embodiment 1 of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] In this document, suffixes such as "module," "part," or "unit" used to denote elements are used only for the purpose of illustrative purposes and have no specific meaning in themselves. Therefore, "module," "part," or "unit" may be used interchangeably.

[0022] In this document, the terms "upper," "lower," "inner," "outer," "front," "rear," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In this document, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] In this document, "and / or" includes any and all combinations of one or more of the listed related items.

[0025] In this article, "multiple" means two or more, that is, it includes two, three, four, five, etc.

[0026] As used in this specification, the term "about" typically means + / -5% of the value, more typically + / -4% of the value, more typically + / -3% of the value, more typically + / -2% of the value, even more typically + / -1% of the value, and even more typically + / -0.5% of the value.

[0027] Example 1: This embodiment provides a method for producing high-titanium and high-magnesium oxide pellets, the specific steps of which include: S1 selects Class I vanadium-titanium ore, Class II vanadium-titanium ore, and laterite nickel ore as raw materials for preparation; the physicochemical parameters of Class I vanadium-titanium ore are as follows: TFe content 55%-56%, TiO2 content 10%-11%, MgO content 2.3%-2.4%, and -200 mesh particle size percentage 65-75%; the physicochemical parameters of Class II vanadium-titanium ore are as follows: TFe content 59%-60%, TiO2 content 7%-8%, MgO content 1.9%-2.0%, and -200 mesh particle size percentage 92.5-97.5%; the physicochemical parameters of laterite nickel ore are as follows: TFe content 49%-50%, total moisture 18%-22%, and MgO content 0.48%-0.49%.

[0028] In this embodiment, based on the production requirements of high-titanium and high-magnesium oxide pellets, vanadium-titanium ore and laterite nickel ore with matching physicochemical properties are selected to achieve the goal of complementary raw material properties and compatible production parameters.

[0029] The raw material combination selected in this embodiment is designed to address the poor pelletizing properties of high-titanium and high-magnesium vanadium-titanium ore in the Panxi region, insufficient roasting liquid phase, and the underutilization of low-grade lateritic nickel ore. Specifically, Class I / II vanadium-titanium ore, namely Taihe vanadium-titanium concentrate and Anning vanadium-titanium concentrate, are typical concentrate varieties in the Panxi region, and their physicochemical indicators exhibit regional resource characteristics. Low-grade lateritic nickel ore is an underutilized resource, and its composition can compensate for the performance defects of vanadium-titanium ore, while simultaneously achieving synergistic resource utilization.

[0030] The three types of raw materials selected in this invention achieve the following through the complementarity of their physicochemical indicators: iron grade complementarity: the high TFe of type II vanadium-titanium ore compensates for the low TFe of type I vanadium-titanium ore and laterite nickel ore, ensuring the iron grade of the pellets; melting point control: the low TiO2 of type II vanadium-titanium ore and the low MgO of laterite nickel ore dilute the high TiO2 and high MgO of type I vanadium-titanium ore, controlling the melting point of the mixture within a suitable roasting range; pelletizing optimization: the fine particle size of type II vanadium-titanium ore and the natural moisture of laterite nickel ore improve the coarse particle size and poor hydrophilicity defects of type I vanadium-titanium ore, improving the quality of green pellets; and resource utilization: idle low-grade laterite nickel ore is converted into production aids, achieving efficient resource synergy.

[0031] S2 collects the physicochemical parameters of Class I vanadium-titanium ore, Class II vanadium-titanium ore, and laterite nickel ore, calculates the batching ratio based on the physicochemical parameters, and the batching ratio includes the mass percentage of Class I vanadium-titanium ore, Class II vanadium-titanium ore, laterite nickel ore, and steelmaking dust removal sludge; and prepares the mixture according to the batching ratio.

[0032] The purpose of this step is to calculate the proportions of various materials based on specific physicochemical parameters. Type I vanadium-titanium ore will be used to determine the basic iron grade, melting point influencing factor, and basic data on pelletizing properties of the mixture. Type II vanadium-titanium ore will be used to supplement iron grade, dilute the TiO2 / MgO ratio of the mixture, increase the proportion of fine particles, and optimize pelletizing and roasting performance. Lateritic nickel ore will dilute MgO to lower the melting point, utilize natural moisture to improve hydrophilicity, and achieve low-grade resource utilization. Steelmaking dust removal sludge will fix carbon to assist in roasting energy saving, adjust the humidity of the mixture, and add a small amount of binding components from the ash.

[0033] Specifically, in this embodiment, let the mass percentage of type I vanadium-titanium ore be x1, the mass percentage of type II vanadium-titanium ore be x2, the mass percentage of laterite nickel ore be x3, and the mass percentage of steelmaking dust removal sludge be x4. Then, x1+x2+x3+x4=100%, and x3∈[1%,5%], x4∈[1.5%,2.5%].

[0034] The mass percentage of laterite nickel ore is at least 1% to ensure that it can play its role in diluting MgO and improving hydrophilicity, and at most 5% to avoid the iron grade of the pellets from being reduced due to excessively low TFe, while controlling the risk of green pellet sticking caused by excessive natural moisture.

[0035] The mass ratio of steelmaking dust removal sludge should be controlled within the range of 1.5%-2.5%. When x4 < 1.5%, the fixed carbon content is insufficient, which cannot assist in roasting and energy saving, and the binding effect is poor. When x4 > 2.5%, the ash content is too high, which will dilute the effective components of the pellets and lead to a decrease in compressive strength.

[0036] The ingredient ratios are obtained by solving an objective function, which is: ; Among them, C 膨润土 The unit price of bentonite is m. 膨润土 For bentonite consumption per unit; C 燃料 Q represents the unit price of fuel. 热耗 Heat consumption per ton of ore; F 抗压强度 This refers to the compressive strength of the pellets.

[0037] The purpose of minimizing f1 is to minimize the bentonite and fuel costs per unit of pellet, thereby controlling the total production cost. The purpose of maximizing f2 is to maximize the compressive strength of the pellets (a core quality indicator) to ensure product compliance. The purpose of maximizing f3 is to maximize the blending ratio of laterite nickel ore to achieve efficient utilization of low-grade resources.

[0038] Furthermore, the constraints on the objective function are as follows: , in, The drop strength of the raw ball. This represents the mass percentage of ferrous oxide in the mixture.

[0039] Green pellet drop strength is a key quality indicator in the pelletizing stage. When it is lower than the reference value, the green pellets are prone to cracking and pulverizing during transportation and drying, leading to a decrease in subsequent roasting efficiency and an increase in the loss of recycled materials. Excessive FeO content will reduce the reducibility of the pellets and affect the efficiency of subsequent blast furnace smelting. The industrial standard requires that the FeO content of oxidized pellets be ≤1.5%.

[0040] More specifically, the method for solving the objective function in this embodiment includes: S21 randomly generates N sets of ingredient ratios that meet the constraints as the initial population.

[0041] Based on the constraints, N=200 sets of ingredient ratios that meet the requirements are randomly generated. Each set of ratios must satisfy the following: x1+x2+x3+x4=100%; 1%≤x3≤5%, 1.5%≤x4≤2.5%; x1≥0, x2≥0.

[0042] S22 calculates the objective function value of the feed ratio for each group in the population.

[0043] In this embodiment, the objective function value can be solved using a random forest model. Specifically, each initial ratio is input into the "raw material-performance" mapping model (a random forest model trained based on historical production data), and the corresponding f1, f2, and f3 values ​​are calculated.

[0044] For example, given a ratio of x1=67%, x2=30%, x3=2%, x4=1%, the calculated value is m. 膨润土 =13.2kg / t, Q 热耗 =13.1Kcal / t, thus f1=12.8 yuan / t; f2=2350N; f3=2%.

[0045] S23 uses non-dominated sorting and crowding selection to retain the optimal solution group.

[0046] The 200 solutions are categorized into hierarchy based on their dominance relationships, with approximately 30-50 first-level solutions retained. A first-level solution is one where no other solution is superior to it in all three objectives. The density of first-level solutions in the objective space is calculated, and solutions with low density are retained to avoid local optima.

[0047] S24 outputs the optimal solution after a preset number of iterations.

[0048] The retained solutions are crossovered and mutated to generate 200 new populations. After setting the number of iterations, for example 100, if the first-level solutions do not change significantly in 10 consecutive iterations, the iteration is stopped.

[0049] From the final first-order solution, select F 抗压强度 ≥2300N, FeO≤1.5%, G 落下强度 The final mix proportions are ≥8 times / 0.5m, with x1=66%, x2=31%, x3=2.2%, and x4=0.8%.

[0050] S3 involves drying and roller milling the mixture.

[0051] This step reduces the natural moisture content of the mixture to a suitable range for pelletizing, avoiding excessive moisture leading to agglomeration and pellet sticking in the roller mill, or insufficient moisture leading to poor pelletizing properties. It refines the coarse particles in the mixture, such as vanadium-titanium ore (200 mesh) accounting for 65%-75%, increases the proportion of fine particles, enhances the specific surface area and hydrophilicity of the material, and reduces the amount of bentonite used in the subsequent process. Through the extrusion and grinding action of the roller mill, the four types of raw materials are further mixed, eliminating local component segregation during the batching stage.

[0052] In this step, the prepared green pellets are fed into a chain grate machine for drying and preheating (two-stage drying and two-stage preheating). The drying temperature is controlled at 300-400℃, and the drying time is about 10 minutes, reducing the moisture content of the green pellets to below 3%. The drying process uses a forced-air drying method to prevent cracking and pulverization of the green pellets during drying. The preheating temperature is controlled at 900-1050℃, and the preheating time is about 15 minutes. Its main purpose is to preheat the pellets to prevent them from bursting due to excessive temperature differences when entering the rotary kiln.

[0053] S4 adjusts the bentonite ratio according to the weight of the green pellets and mixes them thoroughly.

[0054] This step dynamically adjusts the amount of bentonite based on the actual physical properties of the pretreated material and the feedback on the quality of green pellets during the pelletizing stage. This avoids insufficient binder leading to poor green pellet strength or excessive binder leading to increased costs and decreased calcination performance.

[0055] Specifically, in this embodiment, if the drop strength of the green pellets is <8 times / 0.5m, the bentonite ratio is increased by 0.1%-0.3%; If the proportion of 10-14mm green pellets is less than 80%, increase the bentonite ratio by 0.05%-0.2% and adjust the moisture content of the mixture by ±0.15%. If the moisture content of the raw clay pellets is greater than 8.5% and they are sticking together, reduce the bentonite ratio by 0.1%-0.2%. If the green pellet drop strength is ≥8 times / 0.5m, the proportion of green pellets of 10-14mm is ≥80%, and the moisture content of green pellets is within the range of 7.5%-8.5%, the current bentonite mix ratio shall be maintained.

[0056] S5 pelletizes the mixed material into green pellets.

[0057] In this embodiment, a pelletizing machine is used for pelletizing, with a rotation speed of 8-10 r / min and a pelletizing time of 5-7 minutes.

[0058] S6 involves roasting raw pellets to form ore pellets.

[0059] The roasting stage takes place in a rotary kiln, requiring a kiln head temperature of 1150-1250℃ and a kiln tail temperature of 850-950℃. Air is adjusted daily, utilizing the regular falling of kiln rings to ensure smooth and stable roasting of the pellets.

[0060] Example 2: The present invention also provides a production system for high-titanium and high-magnesium oxide pellets, comprising: The raw material selection module is used to select Class I vanadium-titanium ore, Class II vanadium-titanium ore, and laterite nickel ore as raw materials. The physicochemical parameters of Class I vanadium-titanium ore range from 55%-56% TFe content, 10%-11% TiO2 content, 2.3%-2.4% MgO content, and 65-75% -200 mesh particle size. The physicochemical parameters of Class II vanadium-titanium ore range from 59%-60% TFe content, 7%-8% TiO2 content, 1.9%-2.0% MgO content, and 92.5-97.5% -200 mesh particle size. The physicochemical parameters of laterite nickel ore range from 49%-50% TFe content, 18%-22% total moisture, and 0.48%-0.49% MgO content. The ingredient ratio calculation module is used to collect the physicochemical parameters of Class I vanadium-titanium ore, Class II vanadium-titanium ore, and laterite nickel ore, calculate the ingredient ratio based on the physicochemical parameters, and the ingredient ratio includes the mass percentage of Class I vanadium-titanium ore, Class II vanadium-titanium ore, laterite nickel ore, and steelmaking dust removal sludge; and configure the mixed materials according to the ingredient ratio. The pretreatment module is used to dry and roll the mixture. The bentonite addition module is used to adjust the bentonite ratio and mix it evenly according to the weight of the green pellets. The pelletizing module is used to pelletize the mixed material into green pellets. The roasting module is used to roast green pellets to form ore pellets.

[0061] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0062] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A method for producing high-titanium, high-magnesium oxide pellets, characterized in that, include: Vanadium-titanium ore of type I, type II, and laterite nickel ore were selected as raw materials for preparation. The physicochemical parameters of type I vanadium-titanium ore ranged from 55% to 56% TFe content, 10% to 11% TiO2 content, 2.3% to 2.4% MgO content, and 65% to 75% -200 mesh particle size. The physicochemical parameters of type II vanadium-titanium ore ranged from 59% to 60% TFe content, 7% to 8% TiO2 content, 1.9% to 2.0% MgO content, and 92.5% to 97.5% -200 mesh particle size. The physicochemical parameters of laterite nickel ore ranged from 49% to 50% TFe content, 18% to 22% total moisture, and 0.48% to 0.49% MgO content. Physicochemical parameters of Class I vanadium-titanium ore, Class II vanadium-titanium ore, and laterite nickel ore are collected. The proportion of ingredients is calculated based on the physicochemical parameters. The proportion of ingredients includes the mass percentage of Class I vanadium-titanium ore, Class II vanadium-titanium ore, laterite nickel ore, and steelmaking dust removal sludge. The mixture is then prepared according to the proportion of ingredients. The mixture is dried and then milled. Adjust the bentonite ratio according to the weight of the green pellets and mix thoroughly. The mixed material is pelletized to form green pellets; Raw pellets are roasted to form ore pellets.

2. The method for producing high-titanium, high-magnesium oxide pellets according to claim 1, characterized in that, Let x1 be the mass percentage of Class I vanadium-titanium ore, x2 be the mass percentage of Class II vanadium-titanium ore, x3 be the mass percentage of laterite nickel ore, and x4 be the mass percentage of steelmaking dust removal sludge. Then we have x1 + x2 + x3 + x4 = 100%, and x3 ∈ [1%, 5%], x4 ∈ [1.5%, 2.5%].

3. The method for producing high-titanium, high-magnesium oxide pellets according to claim 1, characterized in that, The ingredient ratios are obtained by solving an objective function, which is: ； Among them, C 膨润土 The unit price of bentonite is m. 膨润土 For bentonite consumption per unit; C 燃料 Q represents the unit price of fuel. 热耗 Heat consumption per ton of ore; F 抗压强度 This refers to the compressive strength of the pellets.

4. The method for producing high-titanium, high-magnesium oxide pellets according to claim 3, characterized in that, The constraints of the objective function are: ， in, The drop strength of the raw ball. This represents the mass percentage of ferrous oxide in the mixture.

5. The method for producing high-titanium, high-magnesium oxide pellets according to claim 3, characterized in that, Methods for solving the objective function include: Randomly generate N sets of ingredient ratios that meet the constraints as the initial population; Calculate the objective function value for the feed ratio of each group in the population; The optimal solution group is retained by sorting by non-dominated order and filtering by crowding. The optimal solution is output after a preset number of iterations.

6. The method for producing high-titanium, high-magnesium oxide pellets according to claim 1, characterized in that, Methods for adjusting the bentonite ratio based on the weight of the green pellets include: If the drop strength of the raw pellets is less than 8 times / 0.5m, increase the bentonite ratio by 0.1%-0.3%; If the proportion of 10-14mm green pellets is less than 80%, increase the bentonite ratio by 0.05%-0.2% and adjust the moisture content of the mixture by ±0.15%. If the moisture content of the raw clay pellets is greater than 8.5% and they are sticking together, reduce the bentonite ratio by 0.1%-0.2%. If the green pellet drop strength is ≥8 times / 0.5m, the proportion of green pellets of 10-14mm is ≥80%, and the moisture content of green pellets is within the range of 7.5%-8.5%, the current bentonite mix ratio shall be maintained.

7. The method for producing high-titanium, high-magnesium oxide pellets according to claim 1, characterized in that, Use a pelletizing machine to form pellets. The pelletizing machine rotates at 8-10 r / min and the pelletizing time is 5-7 minutes.

8. The method for producing high-titanium, high-magnesium oxide pellets according to claim 1, characterized in that, Dry and preheat the raw pellets before roasting; the drying temperature is 300-400℃ and the drying time is 9-11 minutes; the preset temperature is 900-1050℃ and the preheating time is 13-17 minutes.

9. The method for producing high-titanium, high-magnesium oxide pellets according to claim 1, characterized in that, The green pellets are roasted using a rotary kiln, with the kiln head temperature at 1150-1250℃ and the kiln tail temperature at 850-950℃.

10. A production system for high-titanium, high-magnesium oxide pellets, characterized in that, include: The raw material selection module is used to select Class I vanadium-titanium ore, Class II vanadium-titanium ore, and laterite nickel ore as raw materials. The physicochemical parameters of Class I vanadium-titanium ore range from 55%-56% TFe content, 10%-11% TiO2 content, 2.3%-2.4% MgO content, and 65-75% -200 mesh particle size. The physicochemical parameters of Class II vanadium-titanium ore range from 59%-60% TFe content, 7%-8% TiO2 content, 1.9%-2.0% MgO content, and 92.5-97.5% -200 mesh particle size. The physicochemical parameters of laterite nickel ore range from 49%-50% TFe content, 18%-22% total moisture, and 0.48%-0.49% MgO content. The ingredient ratio calculation module is used to collect the physicochemical parameters of Class I vanadium-titanium ore, Class II vanadium-titanium ore, and laterite nickel ore, calculate the ingredient ratio based on the physicochemical parameters, and the ingredient ratio includes the mass percentage of Class I vanadium-titanium ore, Class II vanadium-titanium ore, laterite nickel ore, and steelmaking dust removal sludge; and configure the mixed materials according to the ingredient ratio. The pretreatment module is used to dry and roll the mixture. The bentonite addition module is used to adjust the bentonite ratio and mix it evenly according to the weight of the green pellets. The pelletizing module is used to pelletize the mixed material into green pellets. The roasting module is used to roast green pellets to form ore pellets.

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