Method for preparing titanic chloride by half cycle fluidization

A titanium tetrachloride, semi-circulation technology, applied in the direction of titanium halide, fluidized bed furnace, lighting and heating equipment, etc., to achieve the effect of high coke concentration, sufficient contact, and improved production efficiency

Inactive Publication Date: 2009-07-08
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to: aim at the shortcomings of the existing method for preparing titanium tetrachloride, provide a method for preparing titanium tetrachloride by semi-circulation fluidization, which has high production efficiency, good product quality, convenient operation and can fully utilize Low grade, high calcium and magnesium content, high titanium slag, etc.

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  • Method for preparing titanic chloride by half cycle fluidization

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Effect test

Embodiment 1

[0026] Such as figure 1 Shown, the concrete steps of the method for preparing titanium tetrachloride by a kind of semicirculation fluidization are as follows:

[0027] (1) Raw material preheating

[0028] Low-grade high-titanium slag and coke are used as solid raw materials, and chlorine and nitrogen are used as gas raw materials. For solid raw materials, the average diameter of high titanium slag particles: the average diameter ratio of coke particles is 1:0.9, and the mass ratio of high titanium slag:coke is 1:1, and the high titanium slag particles and coke particles are mixed After uniformity, the solid mixture is heated by an electric heater until the temperature of the solid mixture is 500°C. At the same time, nitrogen and chlorine are mixed, wherein the molar percentage of chlorine is 70%, and the molar percentage of nitrogen is 30%, and then the mixed gas is heated through a heat exchanger until the temperature of the gas mixture is 450°C.

[0029] (2) Chlorination ...

Embodiment 2

[0038] A kind of semicirculation fluidization prepares the concrete steps of the method for titanium tetrachloride as follows:

[0039] (1) Raw material preheating

[0040] With embodiment 1. The characteristics are: the mass ratio of high titanium slag:coke is 1:0.3, the average diameter ratio of high titanium slag particles:coke particles is 1:1.2, the molar percentage of chlorine is 100%, and the molar percentage of nitrogen is 0 %.

[0041] (2) Chlorination reaction

[0042] With embodiment 1. The feature is that the linear velocity of the gas in the gas-solid premixing section 3 is 5.5m / s, and the linear velocity of the gas in the fluidized reactor 4 is 3.6m / s.

[0043] (3) cooling

[0044] With embodiment 1.

[0045] (4) Gas-solid separation

[0046] With embodiment 1.

[0047] The conversion rate and yield of high-titanium slag were determined by experiments, and the TiO 2 The conversion rate reaches 95%, and the titanium yield reaches 92%.

Embodiment 3

[0049] A kind of semicirculation fluidization prepares the concrete steps of the method for titanium tetrachloride as follows:

[0050] (1) Raw material preheating

[0051] With embodiment 1. The characteristics are: the mass ratio of high titanium slag: coke is 1:1.5, the average diameter ratio of high titanium slag particles: coke particles is 1:0.8, the molar percentage of chlorine gas is 50%, and the molar percentage of nitrogen gas is 50% %, heated to a solid mixture temperature of 400 ° C. Heat until the temperature of the gas mixture is 300°C.

[0052] (2) Chlorination reaction

[0053] With embodiment 1. The characteristics are: the linear velocity of the gas in the gas-solid premixing section 3 is 4m / s, the linear velocity of the gas in the fluidized reactor 4 is 2.8m / s, and the reaction temperature is 900°C.

[0054] (3) cooling

[0055] With embodiment 1. The characteristic is that the temperature at the outlet of the cooling section 5 is 450°C.

[0056] (4)...

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Abstract

The invention discloses a method for preparing titanium tetrachloride through semi-circulating fluidization, which relates to a method for preparing the titanium tetrachloride. The method takes low-grade high titanium slag and coke as solid raw materials, takes chloride and nitrogen as gas raw materials, and utilizes a semi-circulating fluidized bed to obtain a finished product through a chlorination reaction, cooling and gas-solid separation. The method avoids the agglomeration and adhesion of the particles by circulating coke particles with smaller viscosity and suspending high titanium slag particles with larger viscosity in a fluidized bed reactor, can fully utilize low-grade high titanium slag resource, and has the characteristics of high production efficiency, good product quality, simple and convenient operation, suitability for industrial mass production and the like. The method can be widely applied to the preparation of the titanium tetrachloride by utilizing titanium ore, and is particularly suitable to utilize the low-grade high titanium slag to prepare the titanium tetrachloride.

Description

technical field [0001] The invention belongs to the technical field of preparing titanium tetrachloride, and in particular relates to a method for preparing titanium tetrachloride. Background technique [0002] Titanium tetrachloride is an important intermediate for the manufacture of titanium dioxide (titanium dioxide) and titanium metal. Titanium dioxide is considered to be a white pigment with the best performance in the world, and it is widely used in coatings, plastics, papermaking, printing ink, chemical fiber, rubber, cosmetics and other industries. China is currently the second largest consumer of titanium dioxide after the United States, and the growth momentum is rapid and the potential is also very large. At present, the use of titanium is also developing rapidly, and it has been widely used in aircraft, rockets, artificial satellites, spacecraft, ships, light industry, chemical industry, textile, medical and petrochemical industries. China is a country with a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/02F27B15/00
Inventor 陈恒志贾玲玲陈小翠
Owner CHONGQING UNIV
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