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Method for preparing vanadium oxychloride by low-temperature chlorination of blast furnace slag

A technology of vanadium oxychloride and blast furnace slag is applied in the fields of metallurgy and chemical industry, which can solve the problems of high energy consumption and long process flow.

Inactive Publication Date: 2020-01-03
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent realizes the low-temperature chlorination of vanadium-containing materials to extract vanadium, but the vanadium-containing materials need to be roasted and then reacted under the protection of an inert gas, resulting in high energy consumption and long process flow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix 100-400 mesh blast furnace slag and 80-160 mesh petroleum coke according to the mass ratio of blast furnace slag and petroleum coke at 100:8 (the mass ratio of blast furnace slag and petroleum coke is also called carbon ratio) to form a mixture; then Put the mixed material into the low-temperature chlorination furnace to complete the feeding operation; after the feeding is completed, preheat the solid mixed material (ie, blast furnace slag and petroleum coke), and heat the solid mixed material to 360°C; Chlorine gas is passed into the middle to make low-temperature chlorination reaction between chlorine gas and the preheated mixture, and the reaction temperature is controlled at 350°C to obtain a mixed gas containing vanadyl trichloride. Chlorine is a normal temperature gas. The content of vanadyl trichloride in the mixed gas of the product of this embodiment is 1.2%, and the extraction rate of V in the blast furnace slag is 65%.

[0023] After the chlorination rea...

Embodiment 2

[0025] Mix 140-500 mesh blast furnace slag and 80-180 mesh petroleum coke according to the mass ratio of blast furnace slag and petroleum coke at 100:7 (the mass ratio of blast furnace slag and petroleum coke is also called carbon ratio) to form a mixture; then Put the mixed material into the low-temperature chlorination furnace to complete the feeding operation; after the feeding, preheat the solid mixed material (ie, blast furnace slag and petroleum coke), and heat the solid mixed material to 320°C; after completing the preheating, feed the chlorination furnace Chlorine gas is passed into the middle to make low-temperature chlorination reaction between chlorine gas and the preheated mixture, and the reaction temperature is controlled at 315°C to obtain a mixed gas containing vanadyl trichloride. Chlorine is a normal temperature gas. The content of vanadyl trichloride in the mixed gas of the product of this embodiment is 1.5%, and the extraction rate of V in the blast furnace...

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Abstract

The invention belongs to the technical field of chemical engineering and metallurgy, and particularly relates to a method for preparing vanadium oxychloride through low-temperature chlorination of blast furnace slag. The technical problem to be solved by the invention is to provide the method for preparing the vanadium oxytrichloride by low-temperature chlorination of the blast furnace slag, whichcomprises the following steps: mixing the blast furnace slag and a carbonaceous reducing agent, preheating, and introducing chlorine to react to obtain a vanadium oxytrichloride-containing mixed product. According to the method, vanadium in the blast furnace slag can be well recycled.

Description

technical field [0001] The invention belongs to the technical fields of chemical industry and metallurgy, and in particular relates to a method for preparing vanadium oxychloride by direct low-temperature chlorination of blast furnace slag. Background technique [0002] Panxi area is rich in reserves of vanadium-titanium magnetite, and vanadium resources account for about 60% of the national reserves. At this stage, the industrial development and utilization of vanadium-titanium magnetite has been realized by adopting the blast furnace-converter process, but this leads to about 20% of the total resources of vanadium resources entering the blast furnace slag. How to realize the comprehensive utilization of vanadium resources in high-titanium blast furnace slag is an urgent problem to be solved in the current iron and steel industry. [0003] In the prior art, CN201710030787.X discloses a method for preparing high-purity vanadium pentoxide by using vanadium-containing materia...

Claims

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Application Information

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IPC IPC(8): C01G31/00C22B7/04C22B34/22
CPCC01G31/00C22B7/04C22B34/22Y02P10/20
Inventor 王建鑫李良周丽凌鹏
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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