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Method for preparing C-O-T (carbon-oxygen-titanium) composite anode by microwave heating

A composite anode and microwave heating technology, applied in the field of powder metallurgy, can solve the problems of unstable phase composition, uneven heating, and low thermal efficiency of the final reduction product

Inactive Publication Date: 2011-01-19
PANZHIHUA IRON AND STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned heating methods generally have disadvantages such as long sintering cycle, high energy consumption, low thermal efficiency, and uneven heating, which lead to unstable phase composition of the final reduction product and poor overall process economy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 100g of titanium dioxide, its particle size is 250 mesh, wherein TiO 2 The content is 99wt%, 52.1 grams of anthracite, and the carbon content in the anthracite is 95wt%. The above two materials are mixed evenly in a planetary ball mill, and the carbon content is 500kg / cm 2 The pressure is pressed and formed in a metal hydraulic press, the pressed material is put into the reactor, argon is introduced as a protective gas, the flow rate is 0.5L / min, the microwave is turned on, the microwave frequency is 3000MHz, and the reaction temperature is controlled at 1200°C. The reaction time is 360min. After the carbothermal reaction is completed, the reaction product is naturally cooled with the furnace, and the main phase of the cooled product is analyzed by XRD to be TiC, Ti 2 o 3 and C, that is titanium carbon oxide composite anode.

Embodiment 2

[0026] Weigh 100g of titanium dioxide, its particle size is 200 mesh, wherein TiO 2 The content is 98wt%, 40 grams of charcoal, and the carbon content in the charcoal is 74wt%. The above two materials are mixed evenly in a planetary ball mill, and the carbon content is 1000kg / cm 2 The pressure is pressed and formed in the metal hydraulic press, the pressed material is put into the reactor, argon is introduced as the protective gas, the flow rate is 2L / min, the microwave is turned on, the microwave frequency is 3000MHz, and the reaction temperature is controlled at 1100°C. The time is 240 minutes. After the carbothermal reaction is completed, the reaction product is naturally cooled with the furnace. The XRD phase analysis of the cooled product shows that the main phase is TiO TiC, and the chemical composition is TiC. 0.51 o 0.49 , which is the carbon-titanium composite anode.

Embodiment 3

[0028] Weigh 100g of titanium dioxide, its particle size is 180 mesh, wherein TiO 2 The content is 98wt%, 11 grams of petroleum coke, and the carbon content in petroleum coke is 90wt%. The above two materials are mixed evenly in a planetary ball mill, and the carbon content is 800kg / cm 2 The pressure is pressed and formed in the metal hydraulic press, the pressed material is put into the reactor, argon is introduced as the protective gas, the flow rate is 5L / min, the microwave is turned on, the microwave frequency is 900MHz, and the reaction temperature is controlled at 1000°C. Time 100min. After the carbothermal reaction is completed, the reaction product is naturally cooled with the furnace. The cooled product is a solid solution composed of low-valent titanium oxide and carbon. The main phase is Ti 3 o 5 、Ti 2 o 3 and C, that is titanium carbon oxide composite anode.

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Abstract

The invention discloses a method for preparing a C-O-T (carbon-oxygen-titanium) composite anode by microwave heating, which comprises the following steps: evenly mixing titanium-containing materials with carbonaceous reducing agents, wherein the weight ratio of the titanium-containing material to the carbonaceous reducing agent is 100: (10-50); preparing the obtained mixed materials into a blank through pressure forming; putting the blank in a reactor, and then feeding protective gases into the reactor; heating the blank at a temperature of 1000 to 1200 DEG C by microwaves, after carrying out heat preservation on the obtained blank for a while, cooling the obtained end reduction product to room temperature so as to obtain the C-O-T composite anode. The method of the invention has the advantages of short process flow, short reaction time, low reaction temperature, low energy consumption, environmental friendliness, easy realization of process continuity and good application prospect, and the like.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a method for preparing a carbon-oxygen-titanium composite anode by microwave heating. Background technique [0002] Microwave heating, as a new green metallurgy and material preparation method, has developed into an attractive emerging frontier interdisciplinary subject. The application of microwave heating in metallurgy has incomparable advantages compared with conventional heating methods: selective heating, fast heating rate, high heating efficiency, changing the heat conduction process of conventional heating relying on temperature gradient, etc. Microwave heating has become a rapid preparation of high New materials with high performance and important technical means for modifying traditional materials. [0003] The electrolysis of TiO·mTiC solid solution as a soluble anode is a research hotspot in the preparation of titanium metal by electrolysis. Relevant research in this...

Claims

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Application Information

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IPC IPC(8): B22F3/16B22F3/23
Inventor 闫蓓蕾穆天柱邓斌赵三超徐海海穆宏波
Owner PANZHIHUA IRON AND STEEL
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