A method for preparing titanium agent by utilizing 0-1 mm sponge titanium screening material resources

Abstract

The application discloses a method for preparing a titanium agent by utilizing 0-1 mm sponge titanium screening material resources, relates to the technical field of sponge titanium deep processing, and comprises the following steps: (1) raw material pretreatment: selecting 0-1 mm sponge titanium screening material generated in the production, crushing or screening process of sponge titanium as raw material, and sequentially performing drying, screening, impurity removal and loosening treatment on the sponge titanium screening material, so as to remove foreign impurities, wet lumps and materials with a particle size greater than 1 mm, and obtain dry and loose to-be-pressed materials which can be uniformly distributed. The method for preparing the titanium agent by utilizing 0-1 mm sponge titanium screening material resources takes the 0-1 mm fine particle screening material generated in the production of sponge titanium as raw material, converts the low-added-value and easy-waste industrial by-products into high-precision standardized metallurgical titanium agents, greatly improves the utilization rate of titanium resources, reduces the production cost of enterprises, and extends the titanium processing industrial chain.

Description

Technical Field

[0001] This invention relates to the field of deep processing technology of sponge titanium, specifically a method for preparing titanium agents using 0-1mm sponge titanium sieve material. Background Technology

[0002] Sponge titanium is a core raw material in the titanium industry. During the smelting, crushing, screening, trimming, and scrap recycling of sponge titanium, a large amount of 0-1mm fine-particle screening material is continuously generated. This fine material is characterized by its small particle size, low bulk density, and poor flowability. It is highly susceptible to dust generation and spillage during storage, transportation, and feeding, and its metering accuracy is difficult to control. It cannot directly meet the standardized feeding requirements of industrial smelting and can only be sold as low-end waste at a low price, resulting in extremely low added value. With the continuous expansion of domestic sponge titanium production capacity, the inefficient utilization of massive amounts of fine-particle byproducts is becoming increasingly prominent, causing a serious waste of high-quality titanium resources.

[0003] In the smelting of ferrous metals, non-ferrous metals, and high-temperature alloys, titanium is an important alloying element, grain refining element, deoxidizing and nitrogen-fixing element, which can significantly improve the strength, toughness and corrosion resistance of alloys. In industrial smelting scenarios, to achieve precise batching and stable production, it is generally necessary to use block titanium additives with uniform specifications, accurate weight and uniform density to replace traditional loose titanium powder.

[0004] Existing titanium additive preparation technologies have significant drawbacks: First, mainstream processes require the addition of aluminum powder, chloride fluxing salts, heating agents, organic binders, and other additives to achieve pressing and molding, introducing a large number of non-titanium impurities. This results in insufficient purity of the titanium additive, making it unsuitable for high-end alloy smelting scenarios and exhibiting extremely poor versatility. Second, existing metal briquetting processes are mostly designed for large-particle metal materials or large electrode blocks, without optimizing molding parameters for the material characteristics of 0-1mm fine-particle sponge titanium. This leads to problems such as uneven density of the molded blanks, easy delamination and cracking, poor weight consistency, and severe surface powdering. Third, existing processes lack a closed-loop quality control system, making it impossible to efficiently recycle and reuse unqualified products, resulting in high raw material losses and hindering continuous and stable production. Summary of the Invention

[0005] The purpose of this invention is to provide a method for preparing titanium agents using 0-1mm sponge titanium sieve materials, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing titanium agents using 0-1mm sponge titanium sieve materials, comprising the following steps:

[0007] (1) Raw material pretreatment: Select 0-1mm sponge titanium screening material generated during the production, crushing or screening of sponge titanium as raw material, and perform drying, screening, impurity removal and loosening treatment on the sponge titanium screening material in sequence to remove foreign impurities, damp lumps and materials with a particle size greater than 1mm, so as to obtain dry and loose material that can be evenly distributed for pressing.

[0008] (2) Quantitative loading: The material to be pressed is conveyed into the mold cavity of the molding die, and the loading amount of a single mold cavity is controlled to be 90-110g;

[0009] (3) Press molding: The material to be pressed in the mold cavity is densified by a two-way hydraulic pressing method. The pressing pressure of a single piece of titanium agent is 40-60t. After pressing, a titanium agent blank is obtained.

[0010] (4) Demolding and collection: The titanium blank is ejected from the mold cavity by the demolding ejection mechanism, and the material is transported and collected by the discharge conveying mechanism;

[0011] (5) Inspection and sorting: The weight, size, pressing density and appearance quality of the titanium agent blanks are inspected, qualified standardized titanium agents are screened out, and unqualified titanium agent blanks are returned to the raw material pretreatment step, or are crushed and screened and put back into production.

[0012] Throughout the entire preparation process, the material to be pressed is made using only 0-1mm sponge titanium sieve material, without adding any of the following additives: aluminum powder, chloride fluxing salt, organic binder, or organic molding agent.

[0013] Furthermore, the 0-1mm sponge titanium screening material includes the primary fine particles generated from the sponge titanium finished product crushing and screening process, as well as the secondary fine particles with a particle size ≤1mm obtained from the crushing and screening of sponge titanium scraps.

[0014] Furthermore, after raw material pretreatment, the material to be pressed is free of lumps and hard impurities, has uniform particle size, and has continuous and uniform material distribution performance; the material with a particle size greater than 1mm retained during the pretreatment screening process is returned to the crushing process for secondary crushing or used for separate grading.

[0015] Furthermore, quantitative loading is achieved through at least one of the following methods: feeding time control, feeding mechanism speed control, material distribution volume limitation, material scraping and flattening, and weighing feedback closed-loop adjustment. The target loading amount for a single mold cavity is 100g.

[0016] Furthermore, the forming mold is a multi-cavity forming mold, and the optimal pressing pressure for bidirectional hydraulic pressing is 50t / piece.

[0017] Furthermore, qualified standardized titanium agent is a cylindrical, cake-shaped dense titanium block with a diameter of 45–55 mm, a single block weight of 90–110 g, and a pressing density ≥2.4 g / cm³.

[0018] Furthermore, the optimal parameters for the standardized titanium agent are: diameter 50mm, single piece weight 100g±10g, and pressing density of 2.8~3.2g / cm³ under optimized process.

[0019] Furthermore, the appearance inspection standards are as follows: the titanium agent blank should be free of cracks, delamination, missing corners, loose pieces, and obvious surface powdering; within the finished product packaging unit, the proportion of fine powder with a particle size of less than 10mm should be ≤5%.

[0020] Furthermore, during continuous production, the formed titanium blanks are weighed individually in real time. Based on the deviation between the actual weight and the target weight, the feeding time, feeding mechanism speed and material distribution of subsequent pressing cycles are dynamically adjusted to maintain the weight of a single titanium blank in the range of 90-110g.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] This invention uses 0-1mm fine particle screening material, a waste product from sponge titanium production, as raw material to transform low-value-added and easily damaged industrial by-products into high-precision standardized metallurgical titanium agents, thereby significantly improving the utilization rate of titanium resources, reducing enterprise production costs, and extending the titanium processing industry chain.

[0023] No aluminum powder, fluxing salt, organic binder or other external components are added throughout the process. The titanium agent has a pure titanium dense structure and is free from impurities. It can be widely used in various smelting systems such as ordinary steel, aluminum alloy, copper alloy, nickel-based / cobalt-based high-temperature alloys, breaking through the application limitations of traditional doped titanium agents.

[0024] By employing precise quantitative feeding and bidirectional hydraulic pressing technology, the problems of uneven density, easy cracking and delamination, and large weight deviation of fine granular materials are solved. The finished products have high consistency in size, weight, and density, excellent appearance quality, and extremely low dust content, meeting the needs of precise industrial feeding. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the process flow structure of the device of the present invention;

[0026] Figure 2 This is a cross-sectional view of the press of the present invention;

[0027] In the diagram: 1. Material hopper; 2. Feeding mechanism; 3. Quantitative material distribution mechanism; 4. Multi-cavity molding die; 5. Hydraulic pressing mechanism; 6. Demolding and ejection mechanism. Detailed Implementation

[0028] 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 embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] Standardized batch production process:

[0031] The 0-1mm virgin fine-grained screening material produced in the crushing and screening process of finished sponge titanium products is selected as the production raw material. The raw material is subjected to hot air drying, vibrating screening, manual and magnetic impurity removal, and mechanical loosening treatment to thoroughly remove the material moisture, foreign hard impurities, agglomerated materials and large particles with a particle size >1mm, so as to obtain uniform and loose pure titanium fine material to be pressed. No molding aids are added throughout the process.

[0032] The core forming equipment is a four-beam, four-column hydraulic press with a nominal pressure of 4000kN. It is matched with a six-cavity multi-mold forming die with a single cavity diameter of 50mm and an effective loading height of 80mm. The upper and lower dies are made of Cr12MoV die steel, and the middle die is made of tungsten steel, which is wear-resistant, pressure-resistant, and has high forming accuracy. The equipment is equipped with a PLC intelligent control system, a servo feeding mechanism, an automatic discharge conveying mechanism, and an oil-cooled pressure stabilizing system.

[0033] The quantitative material feeding mechanism controls the single mold cavity loading amount to 100g, initiates the bidirectional hydraulic pressing program, sets the pressing pressure of a single titanium filler to 50t, and sequentially completes the punch descent, pressurization, pressure holding, pressure release, and punch return processes. After pressing, the titanium filler blank is ejected at a uniform speed by the demolding ejection mechanism, and then pushed to the conveyor line by the pushing mechanism to complete the finished product collection.

[0034] The titanium agent prepared in this embodiment is a regular cylindrical cake with a diameter of 50 mm and a single piece weight of 95-105 g. The pressing density is stable at 2.9-3.1 g / cm³. The finished product has no cracks, delamination, or missing corners, and the surface has no obvious powdering. The proportion of fine powder is <3%, which fully meets the standards for industrial smelting.

[0035] Example 2

[0036] Continuous production closed-loop control process:

[0037] Using 0-1mm secondary fine material obtained from crushing and screening sponge titanium scrap as raw material, the core process parameters of solidification pretreatment, loading, pressing, and demolding are established to create a continuous production line mode. Before production, equipment inspection is completed to check the status of hydraulic system, mold precision, electrical control system, and safety protection devices. During the production process, pressing pressure, oil temperature, equipment operating status, and finished product appearance quality are monitored in real time.

[0038] A weighing feedback closed-loop control mode is adopted to automatically weigh each piece of molded titanium agent and compare the measured weight with the target weight of 100g: when the finished product weight is less than 90g, the feeding time is extended, the feeding mechanism speed is increased, and the amount of material applied at one time is increased; when the finished product weight is greater than 110g, the feeding time is shortened, the feeding speed is reduced, the amount of material applied is reduced, and the loading accuracy is dynamically calibrated.

[0039] Each batch of products is sampled and tested. The test indicators include size, weight, density, appearance, fine powder ratio and chemical composition. Unqualified products with excessive weight, appearance defects, or insufficient density are collected, crushed and screened, and then re-entered into the pre-treatment process for reuse.

[0040] This embodiment achieves continuous and stable production, with small batch weight deviations, consistent density uniformity, high finished product qualification rate, no raw material waste, and improved production efficiency compared to traditional processes.

[0041] 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 process, method, article, or apparatus.

[0042] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A method for preparing titanium agents using 0-1mm sponge titanium sieve materials, characterized in that: Includes the following steps: (1) Raw material pretreatment: Select 0-1mm sponge titanium screening material generated during the production, crushing or screening of sponge titanium as raw material, and perform drying, screening, impurity removal and loosening treatment on the sponge titanium screening material in sequence to remove foreign impurities, damp lumps and materials with a particle size greater than 1mm, so as to obtain dry and loose material that can be evenly distributed for pressing. (2) Quantitative loading: The material to be pressed is conveyed into the mold cavity of the molding die, and the loading amount of a single mold cavity is controlled to be 90-110g; (3) Press molding: The material to be pressed in the mold cavity is densified by a two-way hydraulic pressing method. The pressing pressure of a single piece of titanium agent is 40-60t. After pressing, a titanium agent blank is obtained. (4) Demolding and collection: The titanium blank is ejected from the mold cavity by the demolding ejection mechanism, and the material is transported and collected by the discharge conveying mechanism; (5) Inspection and sorting: The weight, size, pressing density and appearance quality of the titanium agent blanks are inspected, qualified standardized titanium agents are screened out, and unqualified titanium agent blanks are returned to the raw material pretreatment step, or are crushed and screened and put back into production. Throughout the entire preparation process, the material to be pressed is made using only 0-1mm sponge titanium sieve material, without adding any of the following additives: aluminum powder, chloride fluxing salt, organic binder, or organic molding agent.

2. The method for preparing titanium agent using 0-1mm sponge titanium sieve material according to claim 1, characterized in that: The 0-1mm sponge titanium screening material includes the primary fine particles produced in the sponge titanium finished product crushing and screening process, as well as the secondary fine particles with a particle size ≤1mm obtained after the sponge titanium scraps are crushed and screened.

3. The method for preparing titanium agent using 0-1mm sponge titanium sieve material according to claim 1, characterized in that: After pretreatment of raw materials, the material to be pressed is free of lumps and hard impurities, and has a uniform particle size, and has the ability to continuously and uniformly distribute the material. The material with a particle size greater than 1mm that is retained during the pretreatment screening process is returned to the crushing process for secondary crushing or used for separate grading.

4. The method for preparing titanium agent using 0-1mm sponge titanium sieve material according to claim 1, characterized in that: The quantitative loading is achieved through at least one of the following methods: feeding time control, feeding mechanism speed control, material distribution volume limitation, material scraping and flattening, and weighing feedback closed-loop adjustment. The target loading amount for a single mold cavity is 100g.

5. The method for preparing titanium agent using 0-1mm sponge titanium sieve material according to claim 1, characterized in that: The forming mold is a multi-cavity forming mold, and the optimal pressing pressure for bidirectional hydraulic pressing is 50t / piece.

6. The method for preparing titanium agent using 0-1mm sponge titanium sieve material according to claim 1, characterized in that: Qualified standardized titanium agent is a cylindrical, cake-shaped dense titanium block with a diameter of 45-55 mm, a single block weight of 90-110 g, and a pressing density ≥2.4 g / cm³.

7. The method for preparing titanium agent using 0-1mm sponge titanium sieve material according to claim 1, characterized in that: The optimal parameters for standardized titanium additives are: diameter 50mm, single block weight 100g±10g, and pressing density of 2.8~3.2g / cm³ under optimized process.

8. The method for preparing titanium agent using 0-1mm sponge titanium sieve material according to claim 1, characterized in that: The appearance inspection standards are as follows: the titanium agent blank should be free of cracks, delamination, missing corners, loose pieces, and obvious surface powdering; within the finished product packaging unit, the proportion of fine powder with a particle size of less than 10mm should be ≤5%.

9. The method for preparing titanium agent using 0-1mm sponge titanium sieve material according to claim 1, characterized in that: During continuous production, the formed titanium blanks are weighed individually in real time. Based on the deviation between the actual weight and the target weight, the feeding time, feeding mechanism speed and material distribution of subsequent pressing cycles are dynamically adjusted to maintain the weight of a single titanium blank in the range of 90-110g.

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