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Preparation process of novel flue gas denitration catalyst raw material

A denitration catalyst and a preparation process technology are applied in the field of preparation of new flue gas denitration catalyst raw materials, and can solve the problems of high equipment requirements, seriousness, corrosion of electrolytic cells, etc.

Inactive Publication Date: 2019-05-28
田长对
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  • Abstract
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  • 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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preparation example Construction

[0009] The method for preparing metallic titanium of the present invention may comprise the following steps:

[0010] (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;

[0011] (b) In a molten salt containing low-valent chlorides of titanium, use the generated titanium carbide, titanium nitride or titanium carbonitride as a soluble anode, and use a metal material as a cathode to perform molten salt electrolysis to obtain metal titanium powder .

[0012] 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.

[0013] In step (b), the prepared titanium carbide or...

Embodiment

[0017] 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:

[0018] 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 KCI-NaCl-TiCl 2 Perform electrolysis in molten salt (the melting temperature of molten salt is about 650°C to 660°C), the electrolysis temperature...

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Abstract

The invention belongs to a preparation process of a novel flue gas denitration catalyst raw material. The preparation process comprises the following steps that titanium oxychloride is prepared; precipitating is performed; filtering is performed; drying is performed; and roasting is performed, wherein the roasting temperature is generally 550-650 DEG C, the concentration of oxygen during normal sintering is about 4-7%, the proportion of oxygen and fuel gas is adjusted every three hours, so that the oxygen concentration is less than 2%, and is maintained for 15 minutes. The preparation processhas the advantages that after the active component of vanadium is loaded, the denitration catalyst is formed; a titanium dioxide carrier has a relatively high specific surface and pore structure, thesurface is provided with more acidic centers, so that after the vanadium is loaded on the titanium dioxide, the titanium dioxide can interact with the vanadium, then the catalytic activity of the vanadium can be enhanced, the anti-sulfur and anti-poisoning capacity of the vanadium catalyst is enhanced, the activity is good, and the catalytic efficiency is high.

Description

technical field [0001] The invention belongs to a preparation process of a novel flue gas denitrification catalyst raw material. Background technique [0002] The method of industrially realizing the preparation of titanium sponge uses magnesium to reduce TiCl 4 The Kroll method and the reduction of TiCl with sodium 4 The Hunter (Hunter) method, and with the closure of the last British Deeside company that adopted the Hunter method in 1993, the only method for the industrial production of titanium sponge in the world is the Kroll method. The Kroll method has a series of shortcomings such as complicated procedures, long production cycle, high energy consumption, high labor intensity, and inability to realize continuous production. Therefore, it is necessary to develop a new titanium production process. [0003] There are many methods for preparing titanium metal that have been studied. The more representative ones are the FFC method proposed by the University of Cambridge i...

Claims

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Application Information

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IPC IPC(8): C25C5/04C22B34/12
Inventor 田长对
Owner 田长对
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