Fluid-bed reactor for oxido-reduction sintering of high calcium magnesium titanium slag

Abstract

The present invention relates to a fluidized bed reactor used for oxidizing and deoxidizing and baking high calcium magnesium titanium slag to remove calcium for improving the titanium inert solid grade, and comprises a cylindrical column material settlement section, a cylindrical column material reaction section, and a coniform column air preheating section. The main body of the cylindrical fluidized bed reactor is the cylindrical column material reaction section, and the top part is of a horn mouth shape, the top part of the horn mouth column body is connected with the cylindrical column material settlement section, the bottom end of the reaction is connected with the air preheating section. The upper part of the air preheating section is provided with a material feeding port, and the bottom part is arranged with an air distribution plate under which an air inlet is provided. The lower part of the material reaction is provided with a material discharging port, and the top part is provided with an air outlet. More than one baffle with holes is arranged in the material reaction. The present invention can make the residence time of particles of the high calcium magnesium titanium slag prolong following the increase of the grain size to satisfy the requirements of the reaction time of different grain sizes of particles.

Description

technical field [0001] The invention belongs to the field of gas-solid phase processing reactors, in particular to a fluidized bed reactor used for oxidation-reduction roasting high-calcium-magnesium titanium slag to remove calcium and magnesium and improve the grade of titanium ore materials. Background technique [0002] my country is a country rich in titanium resources, among which the reserves in the west of Panzhihua account for more than 1 / 4 of the world's total. At present, the utilization of titanium resources in titanium-containing minerals is to obtain titanium tetrachloride through the chlorination method, and then produce titanium products such as titanium white and sponge titanium from titanium tetrachloride. However, the content of calcium and magnesium in Panxi titanium ore is high, and the quality of fine titanium ore (also known as high calcium, magnesium and titanium slag) obtained after smelting in an electric furnace is low. Among them, TiO 2 The conten...

AI Technical Summary

Problems solved by technology

When using a common fluidized bed reactor to treat such materials, the bed expansion rate is low, and a bubble phase and a dense phase appear during the fluidization process, and the gas exchange rate between the two phases is very low, resulting in a decrease in the gas-solid contact efficiency; the fluid state Unstable pressure drop will lead to unstable operating states such as throttling, and large bubbles are not easy to break, which will reduce the gas-solid contact efficiency and directly affect the conversion rate of the reaction and the yield of the product, etc.

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