Chlorination furnace for fine-fraction titanium-rich material and fluidizing chlorination process thereof

A boiling chlorination and chlorination furnace technology, applied in the direction of titanium tetrachloride, titanium halide, etc., can solve the problems that affect the technical and economic indicators of the boiling chlorination process of titanium-rich materials, many micropores, and small bulk density. , to achieve the effect of light weight, increased chlorination rate and product yield, and easy overflow

Active Publication Date: 2020-11-10
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, compared with the high-quality titanium-rich materials used in the existing boiling chlorination process, the artificial rutile prepared by using Panzhihua titanium concentrate has a significantly finer particle size than fine particles, usually less than 0.074mm, accounting for about 40%, and There are many micropores and low bulk density. Using the existing boiling chlorination process will inevitably lead to a large amount of fine-grained titanium-rich materials being carried out by the gas, seriously affecting the technical and economic indicators of the boiling chlorination process for titanium-rich materials.

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  • Chlorination furnace for fine-fraction titanium-rich material and fluidizing chlorination process thereof
  • Chlorination furnace for fine-fraction titanium-rich material and fluidizing chlorination process thereof

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specific Embodiment

[0050] Such as figure 1 As shown, the main process links of the present invention include: furnace start-up, feed control, reaction and temperature control, slag discharge, dust collection, TiCl4 collection and tail gas treatment. The supporting equipment mainly includes: feeding system, chlorination reactor, dust collection system, TiCl4 collection system, tail gas treatment system. The chlorination reactor is divided into multiple chlorination units, and each chlorination unit contains a gas premix chamber, a gas distributor, a reaction section, a transition section, and a settling section. Each unit has an independent gas supply system, and each gas supply system includes chlorine gas inlet, inert gas inlet (preferably nitrogen), air or oxygen inlet according to needs.

[0051] According to the characteristics of chlorination, the start-up of the furnace is divided into two stages. The first stage is the low-temperature oven stage, which is mainly aimed at the start-up of ...

Embodiment 1

[0090] Start-up: In this embodiment, the refractory lining of the fluidized chlorination furnace is remade.

[0091] ① First, open the air (oxygen) automatic regulating valve and gas automatic regulating valve of the first chlorination unit in sequence, light the burner, control the temperature of the gas premixing room at 100-150°C, control the ratio of air and gas at 4:1, and turn on The nitrogen automatic regulating valve controls the total gas volume entering the fluidized chlorination furnace at 300-350Nm3 / h, and bakes the first chlorination unit of the fluidized chlorination furnace.

[0092]②According to the requirements of the refractory material lining the fluidized chlorination furnace, adjust the gas flow rate and gradually increase the gas temperature. When the gas temperature exceeds 500°C, increase the opening of the automatic air regulating valve and increase the air flow rate. The air volume is controlled at 300Nm3 / h , gradually open the feeding screw of the fe...

Embodiment 2

[0101] Start-up of the furnace: In this embodiment, the furnace is started up when the temperature in the furnace is relatively high after the equipment failure occurs in the system and the furnace is shut down for quick processing.

[0102] Turn on the air automatic regulating valve and coal gas automatic regulating valve in the gas supply device of each chlorination unit in turn, ignite the gas premixing room burner, the ratio of air to gas is 4:1, control the temperature of the gas premixing and setting room at 300-450°C, and control The total gas volume of the primary chlorination unit is 250-300Nm3 / h, the total gas volume of the secondary chlorination unit is 200-250Nm3 / h, the total gas volume of the tertiary chlorination unit is 150-200Nm3 / h, and the boiling chlorination furnace is quickly baked.

[0103] When the gas temperature of the first chlorination unit exceeds 500°C, increase the opening of the automatic air regulating valve, increase the air flow, control the air...

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Abstract

The invention discloses a chlorination furnace for a fine-fraction titanium-rich material and a fluidizing chlorination process thereof, and belongs to the technical field of design and manufacturingof metallurgical production equipment. Provided are a chlorination furnace for the fine-fraction titanium-rich material and the fluidizing chlorination process thereof that can effectively increase chlorination efficiency and greatly reduce chlorination loss. The chlorination furnace comprises a feeding system, a gas supply system, a titanium tetrachloride collecting system and a chlorination furnace body, and further comprises at least two groups of fluidizing chlorination reaction units with gradually deepened chlorination depth, the fluidizing chlorination reaction units sequentially arranged at the lower part of the chlorination furnace body along the chlorination direction communicate with each other by respective upper openings in an overflowing manner; the fluidizing chlorination process enables a fine-grained titanium-rich material entering the chlorination furnace body to be deepened along with the chlorination depth; and the chlorination rate of the titanium-rich material andthe product yield are improved by gradually chlorinating each group of adjacent fluidizing chlorination reaction units of which the chlorination parameters can be independently controlled in an overflow manner.

Description

technical field [0001] The invention relates to a chlorination furnace, in particular to a chlorination furnace for fine-grained titanium-rich materials, and belongs to the technical field of design and manufacture of metallurgical production equipment. The present invention also relates to a boiling chlorination process used in said chlorination furnace. Background technique [0002] Titanium tetrachloride (TiCl 4 ) is an important intermediate product of the titanium industry, mainly used in the production of sponge titanium and the production of titanium dioxide by vapor phase oxidation. Boiling chlorination is the TiO chlorination of the mixture of high-quality titanium-rich material and petroleum coke in a fluidized state with chlorine gas in a fluidized fluidized furnace. 2 Chlorination reaction has become the mainstream technology for producing titanium tetrachloride both at home and abroad. Since the raw material is in a fluidized state in the fluidized furnace, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/02
CPCC01G23/022
Inventor 叶恩东王建鑫刘娟宋兵
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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