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A technology of titanium powder and compression molding, which is applied in the field of rare metal extraction, can solve the problems of high cost of raw materials, and achieve the effect of high practical feasibility, safe operation and mild conditions
Active Publication Date: 2018-03-09
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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Problems solved by technology
This method has a wide range of powder particle size and is easy to realize. It has become the main method for producing titanium powder at home and a
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Embodiment 1
[0046] The method for preparing titanium powder in this embodiment comprises the following steps:
[0047] A. Weigh titanium dioxide (TiO 2 Mass content >99.5%) 80.4g, calcium oxide (AR grade) 56.1g, mixed in a planetary ball mill for 3 hours, pressed and formed with a pressure of 20MPa, placed in a sintering furnace for sintering at 600°C to obtain a sintered product;
[0048] B. After the sintered product is crushed, it is mixed with 84.2g of calcium hydride in a planetary ball mill for 3 hours, and pressed and formed with a pressure of 20MPa to obtain a pre-reduced billet;
[0049] C. Place the pre-reduced billet in a vacuum furnace, adopt a vacuum degree of 1Pa, and perform thermal reduction at a temperature of 800°C to obtain a crude product;
[0050] D. Wash the crude product with dilute hydrochloric acid to remove CaO, then use distilled water to wash dilute hydrochloric acid, and obtain Ti powder after drying. The yield is >98%, and the Ti content is 99.5% according t...
Embodiment 2
[0052] The method for preparing titanium powder in this embodiment comprises the following steps:
[0053] A. Weigh metatitanic acid (TiO(OH) 2 The mass content is 98%) 100g, calcium oxide (AR grade) 56.1g, mixed in a planetary ball mill for 3 hours, pressed and formed with a pressure of 5MPa, placed in a sintering furnace for sintering at 400°C to obtain a sintered product;
[0054] B. After crushing the sintered product, mix it with 84.2g of calcium hydride in a planetary ball mill for 3 hours, press and form it with a pressure of 20MPa to obtain a pre-reduced billet;
[0055] C. Place the pre-reduced billet in a vacuum furnace with a vacuum degree of 0.1Pa and a temperature of 600°C for thermal reduction to obtain a crude product;
[0056] D. Wash the crude product with dilute hydrochloric acid to remove CaO, then use distilled water to wash dilute hydrochloric acid, and obtain Ti powder after drying. The yield is >98%, and the Ti content is 99.0% according to chemical com...
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Abstract
The invention discloses a method for preparing titanium powder, and belongs to the technical field of rare metal refining. A technical problem solved by the method is to provide a titanium powder preparation process with low cost, milder conditions and safer operation. The method for preparing the titanium powder comprises the following steps: A, mixing titanium-containing materials with calcium oxide, pressing, molding, and sintering to obtain a sintered product; B, breaking the sintered product obtained in step A, mixing with calcium hydride, pressing and molding to obtain a pre-reduced blank; C, reducing the pre-reduced blank obtained in step B by vacuum heat to obtain a crude product; D, acid pickling, washing and drying the crude product obtained in step C to obtain the titanium powder. The method for preparing the titanium powder adopts a low-cost titanium-containing material as a raw material, and reduces energy consumption due to formation of a calcium titanate intermediate anduse of vacuum thermal reduction, greatly reduces preparation cost of the titanium powder, and the obtained titanium powder has a purity of more than 99% and a yield of the titanium powder is larger than 98% and the method provides an efficient way for production of titanium powder.
Description
technical field [0001] The invention belongs to the technical field of rare metal refining, and in particular relates to a method for preparing titanium powder. Background technique [0002] Titanium powder refers to a group of titanium particles with a size less than 1mm, which belongs to loose materials, and its performance combines the commonality of titanium matrix and powder. Due to the many excellent properties of titanium powder, it is widely used in aerospace, chemical industry, petroleum, metallurgy and shipbuilding, high-performance titanium and titanium alloys in biomaterials, energy materials, electronic materials and other fields. [0003] The hydrogenation dehydrogenation method (HDH) invented in the United States in 1955 is the main industrial production method of titanium powder at present. Metal titanium (such as sponge titanium, titanium ingot, titanium scrap, residual titanium, etc.) is used as raw material, and hydrogen is positively pressured in the hydr...
Claims
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IPC IPC(8): B22F9/20
CPCB22F9/20B22F2999/00B22F2201/20
Inventor 邓斌穆天柱谢波
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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