Circulating air bed device for modification of titanium concentrate

Abstract

The invention discloses a circulating airflow bed device for continuous production of titanium concentrate modification, which comprises an airflow bed reactor, a titanium concentrate feeding system, a gas inlet system, a waste heat utilization system and a discharge system. The airflow bed The reactor includes an entrained-bed reactor for oxidation roasting and an entrained-bed reactor for reducing roasting. The entrained-bed reactor includes a gas flow distribution section, a gas-solid reaction section, an airflow sorting section and a discharge section, and is provided with a gas inlet, modified There are inert gas inlet, ilmenite concentrate inlet, return material inlet, tail gas outlet and material outlet, and the material outlet includes a large specific gravity material outlet and a small specific gravity material outlet. The device has low requirements on the particle size of raw materials, strong adaptability of raw materials, sufficient and rapid response, high production efficiency, short production cycle, low energy consumption, simple operation and good modification effect.

Description

technical field [0001] The invention relates to a circulating air-flow bed device for modification of titanium concentrate, which belongs to the field of chemical machinery. Background technique [0002] Artificial rutile, also known as synthetic rutile, refers to a titanium-rich raw material that is produced by separating most of the iron, calcium, magnesium and other components in titanium concentrates by chemical processing methods. The composition and structural properties are the same as natural rutile. , whose TiO 2 The content fluctuates between 88% and 96% depending on the processing technology, and it is a high-quality substitute for natural rutile. Because of its good product quality and low impurity content, artificial rutile is often used as a high-quality raw material for boiling chlorination in the production process of sponge titanium or titanium dioxide by chloride method. [0003] At present, the production methods of artificial rutile produced by ilmenite...

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Problems solved by technology

[0024] The fluidized bed device avoids the deficiencies of the rotary kiln modified titanium concentrate and the mechanical grinding modified titanium concentrate to a certain extent, but there are still complex equipment for the fluidized bed device, and the fluidization operation has strict requirements on the airflow velocity. The requirements for control and device operation are high, the requirements for the particle size of titanium concentrate raw materials are high, and the range of raw material particle size is narrow in adaptability. The internal materials in the fluidized bed are prone to defects such as channeling and surges, and it is difficult to achieve continuous production.

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