Method for preparing titanium products with ferrotitanium composite ores as raw materials

A technology for composite minerals and raw materials, applied in the chemical industry, can solve the problems of reducing the selectivity of the chlorination process, increasing the economic cost of the process, reducing the efficiency of titanium chlorination, etc. low cost effect

Active Publication Date: 2018-12-21
朱鸿民
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Problems solved by technology

However, since this process controls the carbonization-reduction endpoint to titanium carbide (TiC), the carbon generated during the chlorination reaction will promote the gangue component (Al 2 o 3 , MgO, CaO, SiO 2 ) of the chlorination significantly reduces the selectivity of the chlorination process, which in turn leads to a certain amount of chlorination impurities (AlCl 3 , MgCl 2 , CaCl 2 、SiCl 4 ), it must be matched with the follow-up refining process and recovery process for secondary treatment in order to obtain higher purity titanium tetrachloride
This brings unnecessary waste of raw and auxiliary materials, and reduces the chlorination efficiency of titanium at the same time, resulting in longer process flow, increased process difficulty, and increased process economic cost.
Apparently, the technology that utilizes ilmenite compound ore to prepare titanium tetrachloride in the prior art needs to be further improved urgently
[0004] At the same time, it was found in the process of producing titanium products that the titanium-rich phase material containing carbon (nitrogen) oxide titanium produced after preparing iron from other ferro-titanium raw materials in the prior art, due to different process conditions, carbon (nitrogen) titanium oxide There are many possibilities for the specific composition of the compound. In some cases, more gangue components are chlorinated, which makes the purity of the obtained titanium products vary. If it is applied in industry, it is still necessary to carry out certain tests on titanium products that do not meet the purity requirements. The post-processing, thus did not fundamentally solve the problem of quality stability of the production of titanium products

Method used

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  • Method for preparing titanium products with ferrotitanium composite ores as raw materials
  • Method for preparing titanium products with ferrotitanium composite ores as raw materials
  • Method for preparing titanium products with ferrotitanium composite ores as raw materials

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Embodiment 1

[0062] Weigh 200.0g of ilmenite (FeO: 42.7%, TiO 2 : 47.5%), put 42.9g of graphite powder (99.9% of carbon content) into the planetary ball mill and mix evenly. 2000°C, keep warm for 3 hours and then cool to room temperature to obtain a reduced product divided into upper and lower parts. The structure of the lower part is analyzed by X-ray diffraction, as shown in the attached manual. figure 2 As shown, it is the reduction product iron; the structure of the upper part is analyzed by X-ray diffraction, as shown in the attached image 3 shown, titanium carbide (TiC 0.5 o 0.5 , x / z=1) and other mixtures of unreduced oxide components. It can be seen that after carbothermal selective reduction, the iron oxide in the ilmenite composite ore is reduced to metallic iron and deposited on the lower part, and the titanium oxide is reduced to titanium oxycarbide (TiC 0.5 o 0.5 ) and other oxide components (Al 2 o 3 -MgO-CaO-SiO 2 ) is at the top. After the upper block of the redu...

Embodiment 2

[0064] Take by weighing 200.0g high titanium slag (Fe 2 o 3 : 10.5%, TiO 2 : 77.7%), add 48.1g of graphite powder (99.9% of carbon content) and put it in a planetary ball mill to mix evenly. ℃, keep warm for 7 hours and then cool to room temperature to obtain a reduction product divided into upper and lower parts. The reduction product iron is deposited in the lower part, and the structure of the upper part is analyzed by X-ray diffraction. x N y o z , x / z=0.75) and the mixture of unreduced components. After the upper block of the reduction product was crushed and ground to below 200 mesh, it was chlorinated at 400°C. After the reaction was complete, the residue was analyzed by X-ray diffraction. It was other oxide components (Al 2 o 3 -MgO-CaO-SiO 2 ), after further oxidation treatment of the chlorination product, the oxidation product obtained was analyzed by X-ray diffraction as titanium dioxide (TiO 2), composition analysis showed that its purity was 99.1%.

Embodiment 3

[0066] Weigh 200.0g of iron ore concentrate (Fe 2 o 3 : 47.3%, FeO: 29.2%, TiO 2 : 12.4%), mixed with 38.6g graphite powder (99.9% carbon content) and placed in a planetary ball mill to mix evenly. After 5 hours of heat preservation, it was cooled to room temperature, and the X-ray diffraction analysis results of the reduction products showed that after carbon thermal selective reduction, the iron oxides in the ilmenite composite ore were reduced to metallic iron, and the titanium oxides were reduced to carbon and nitrogen. Titanium oxide (TiC x N y o z , x / z=0.5), other components were not reduced. After the upper block of the reduction product was crushed and ground to below 200 mesh, it was chlorinated at 400°C. After the reaction was complete, the residue was analyzed by X-ray diffraction. The results showed that other oxide components (Al 2 o 3 -MgO-CaO-SiO 2 ), after further oxidation treatment of the chlorination product, the oxidation product obtained was analy...

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Abstract

The invention relates to a method for preparing titanium products with ferrotitanium composite ores as raw materials, and belongs to the field of chemical engineering. The preparation method comprisesthe following steps: ferrotitanium composite ore raw materials are fed in carbon raw materials according to a certain chemical ratio for uniform mixing, and then, are heated and reduced under a certain atmosphere, so that iron components are reduced as metal iron, titanium components are reduced as carton titanium oxide, carton nitrogen titanium oxide, and other components (aluminum, magnesium, calcium, silicon) are maintained in an oxide state. After iron components are separated, slag phases are selectively chloridized at low temperature to directly obtain titanium tetrachloride with the grade of higher than 99%. The method can effectively reduce the cost in traditional iron and titanium extracting methods, effectively solves the problem of synchronous chloridization of other oxides inthe traditional chloridization method process, prominently improves the selectivity of chloridization procedures in the production process of titanium tetrachloride, improves the chloridization efficiency of titanium, can directly obtain high-purified titanium products, needs no subsequent refining and purification, and greatly simplifies the iron and titanium element extracting method flow of theferrotitanium composite ores.

Description

technical field [0001] The invention mainly belongs to the technical field of chemical industry, and relates to a method for preparing titanium products by using ilmenite composite ore as a raw material, in particular to a method for preparing titanium tetrachloride and titanium dioxide by using ilmenite composite ore as a raw material. The method is to precisely control the high-temperature carbothermal reduction, so that the iron component in the ilmenite composite ore is transformed into metallic iron, and the titanium component is transformed into titanium carbon oxide, titanium carbonitride and other oxides to form a mixture as a chlorination raw material. After chlorination treatment, highly purified titanium tetrachloride can be obtained directly; after titanium tetrachloride is oxidized, highly purified titanium dioxide can be obtained. Background technique [0002] Ferro-titanium composite ore, such as vanadium-titanium magnetite in Panxi area of ​​my country and Ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12
CPCC22B34/1222
Inventor 朱鸿民肖九三朱骏
Owner 朱鸿民
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