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Smelting system and smelting method for vanadium-titanium magnetite concentrate

A vanadium titanomagnetite concentrate and a smelting method technology, applied in the field of smelting, can solve the problems of low cost, low difficulty and high vanadium recovery rate, and achieve the effects of low cost, less nitrogen involvement, and improved properties of titanium slag

Pending Publication Date: 2020-09-18
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a vanadium-titanium magnetite concentrate smelting system and smelting method to solve the problems that the existing vanadium-titanium magnetite concentrate smelting methods cannot satisfy the problems of high vanadium recovery rate, low cost and low difficulty at the same time

Method used

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  • Smelting system and smelting method for vanadium-titanium magnetite concentrate
  • Smelting system and smelting method for vanadium-titanium magnetite concentrate
  • Smelting system and smelting method for vanadium-titanium magnetite concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The vanadium-titanium magnetite, bentonite and water are mixed and stirred according to the weight ratio of 100:0.5:5, and a pelletizing machine is used to form pellets with a particle size of 10-30mm.

[0059] The raw balls are dried, heated and roasted in the oxidation roasting device 10 (rotary kiln) to obtain raw material balls (oxidative pellets), wherein the temperature of the feed inlet of the rotary kiln is 200°C, the temperature of the discharge port is 1100°C, and the pellets The average residence time in the oxidation roasting device 10 is 30 minutes. Combustion of high-temperature reducing tail gas discharged from the reduction smelting device 20 (rotary kiln) is used as a heat source, and a certain amount of natural gas is used to combust to supplement the heat. The oxidizing pellets directly enter the reduction smelting device 20 in the next stage for reduction.

[0060] The reduction smelting device 20 used in the reduction stage is a rotary kiln, and th...

Embodiment 2

[0064] Mix vanadium-titanium-magnetite, organic binder (sodium carboxymethylcellulose) and water according to the weight ratio of 100:3:10, and use a pelletizer to make pellets with a particle size of 10-30mm.

[0065] The green pellets are dried, heated and roasted in the oxidation roasting device 10 (rotary kiln) to obtain raw material pellets (oxidative pellets), wherein the temperature of the feed inlet of the rotary kiln is 150°C, the temperature of the outlet is 1000°C, and the pellets The average residence time in the oxidation roasting device 10 is 60 min. The pulverized coal is burned to supplement the heat, and at the same time, the high-temperature tail gas discharged from the reduction smelting device 20 is introduced to supplement the heat. The oxidizing pellets go directly to the shaft furnace in the next stage for reduction.

[0066] The reduction smelting device 20 used in the reduction stage is a shaft furnace, and the high-temperature water gas produced by i...

Embodiment 3

[0070] Mix vanadium-titanium-magnetite, organic binder (sodium carboxymethylcellulose) and water according to the weight ratio of 100:3:10, and use a pelletizer to make pellets with a particle size of 10-30mm.

[0071] The green pellets are dried, heated and roasted in the oxidation roasting device 10 (rotary kiln) to obtain raw material pellets (oxidative pellets), wherein the temperature of the feed inlet of the rotary kiln is 200°C, the temperature of the outlet is 900°C, and the pellets The average residence time in the oxidation roasting device 10 is 90 minutes. Combustion of pulverized coal is used to supplement the heat, and at the same time, the tail gas discharged from the reduction smelting unit 20 is introduced into the supplementary heat. The oxidizing pellets directly enter the reduction smelting device 20 in the next stage for reduction.

[0072] The reduction smelting device 20 used in the reduction stage is a shaft furnace, and the high-temperature water gas p...

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Abstract

The invention provides a smelting system and a smelting method for vanadium-titanium magnetite concentrate. The smelting system for the vanadium-titanium magnetite concentrate comprises an oxidizing roasting device, a reducing smelting device, and an induction melting device; the oxidizing roasting device is provided with a first feeding hole, an oxidizing gas inlet and an oxidizing roasting product outlet; the reducing smelting device is provided with a second feeding hole, a reducing gas inlet and a metalized material outlet; the second feeding hole communicates with the oxidizing roasting product outlet through a first feeding pipeline; the induction melting device is provided with a third feeding hole, a non-carbon-based reducing agent inlet, a protective gas inlet and a vanadium-containing metal; the protective gas inlet is used for introducing an insert gas; and the third feeding hole communicates with the metalized material outlet, and is used for further reducing a metalized material discharged from the reducing smelting device. The smelting system has the advantages of high vanadium yield, low recycling cost, low recycling difficulty, simple equipment and the like.

Description

technical field [0001] The invention relates to the field of smelting, in particular to a smelting system and a smelting method of vanadium-titanium magnetite concentrate. Background technique [0002] At present, the relatively mature process in the field of vanadium-titanium magnetite concentrate smelting is the blast furnace process, but this process can only recover iron and part of vanadium, and titanium cannot be extracted and used at all. Titanium-containing blast furnace slag due to TiO 2 High content (20-25%) cannot be used as building materials like ordinary blast furnace slag, and is stored in large quantities. Non-blast furnace methods mainly include pre-reduction-electric furnace method, reduction-grinding method, sodium roasting-pre-reduction-electric furnace method, etc. Several types. Non-blast furnace process only pre-reduction-electric furnace method has carried out production-scale experimental research, and other research basically stays in the stage of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/08C22B1/216C22B1/24C22B34/12C22B34/22
CPCC21B13/08C21B13/006C21B13/0046C22B1/2406C22B1/216C22B34/22C22B34/1209
Inventor 王云李东波陈学刚郭亚光裴忠冶
Owner CHINA ENFI ENGINEERING CORPORATION
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