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Production technology of high-purity titanium dioxide

A production process and technology of titanium dioxide, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve problems such as high equipment requirements, severe corrosion, and electrolytic cell corrosion

Inactive Publication Date: 2019-05-28
王鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the temperature of this method is too high (the electrolysis temperature is greater than 1700°C). Under this condition, the liquid in the molten pool corrodes the electrolytic cell quite seriously, and the high temperature and corrosion resistance of the electrolytic cell must also be considered, which requires relatively high equipment.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0010] The method for preparing metallic titanium of the present invention may comprise the following steps:

[0011] (a) When using titanium concentrate to smelt titanium slag, directly add excess carbon-containing reducing agent to generate titanium carbide, or directly add excess carbon-containing reducing agent while feeding nitrogen to make titanium slag generate nitrogen during the smelting process Titanium oxide or titanium carbonitride;

[0012] (b) In the molten salt containing low-valent chloride of titanium, the generated titanium carbide, titanium nitride or titanium carbonitride is used as a soluble anode, and the metal material is used as a cathode to perform molten salt electrolysis to obtain metal titanium pink.

[0013] In step (a), the amount of carbon is theoretically TiO 2 1 to 1.5 times the sum of carbon reduced to titanium carbide or carbon nitride or titanium carbonitride and carbon reduced to impurities.

[0014] In step (b), the prepared titanium ca...

Embodiment

[0018] Weigh 300 grams of TiO 2 Titanium concentrate with a content of 40%, the other components are: 40.98% FeO, 5.42% Fe 2 o 3 , 5.99% MgO, 2.67% CaO, 2.56% SiO 2 , 1.33% Al 2 o 3 , 1.05% MnO. Weigh 82.65 grams of carbon-containing reductant with a fixed carbon content of 94.56% according to the stoichiometric ratio as follows:

[0019] Mix it evenly, put it in a graphite crucible, put it into a vacuum reaction furnace for thermal reduction, heat reduction at a temperature of 1500°C for 5 hours, separate the iron block in the lower layer from the slag phase in the upper layer, and send the slag phase in the upper layer to Sample analysis, through X-ray diffraction phase analysis shows that the main phase of the reduction product is TiC, with the reduction product as the anode, with the carbon steel rod as the cathode, in 4kg KCl-NaCl-TiCl 2 Carry out electrolysis in molten salt (the melting temperature of molten salt is about 650 ℃ ~ 660 ℃), the electrolysis temperatur...

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PUM

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Abstract

The invention belongs to the technical field of the preparation shaping processing of high-purity titanium dioxide, and particularly relates to a production technology of special high-purity titaniumoxide for a flue gas denitrification catalyst. The technology comprises the steps of precipitating, filtering, drying and sintering: the sintering temperature is 550-650 DEG C normally. The oxygen concentration is 4-7% in normal sintering, the proportion of oxygen and gas is adjusted every 3 hours to make the oxygen concentration lower than 2%, and the oxygen concentration is maintained for 15 minutes. The production technology has the advantages that the denitrification catalyst is formed after an active ingredient vanadium is loaded. The titanium powder carrier has a higher specific surfaceratio, the surface of a porous structure is provided with more acid centers, so that interaction with the vanadium takes place after the titanium powder is loaded with the vanadium to enhance the catalytic activity of the vanadium, the sulphur and poisoning resistance of the vanadium catalyst is enhanced, the activity is good, and the catalytic efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of preparation, molding and processing of high-purity titanium dioxide, and specifically refers to a special high-purity titanium dioxide production process for flue gas denitrification catalysts. Background technique [0002] Titanium is a new type of structural material with advantages such as low density, high specific strength and good corrosion resistance. Among structural metals, the reserves of titanium in the earth's crust rank fourth, second only to iron, aluminum and magnesium. However, in the current world metal production, titanium production is very small, mainly because it is currently extracted from ore. The high cost of titanium limits the application of titanium in various industries. Because the extraction cost of titanium metal is too high, it is only used in some very important fields, such as aerospace, electronics industry, precision instrument manufacturing and so on. With the emerge...

Claims

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Application Information

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IPC IPC(8): C22B34/12C25C3/28C01G23/053
Inventor 王鹏
Owner 王鹏
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