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A kind of preparation method of low-reduction pulverized vanadium-titanium magnetite pellets

A technology of vanadium-titanium magnetite and vanadium-titanium magnet, which is applied in the field of preparation of low-reduction pulverized vanadium-titanium magnetite pellets, can solve the problem that it is difficult to meet the raw material requirements for gas-based shaft furnace reduction, and the gas permeability of the shaft furnace deteriorates , Reduce the problem of high pulverization rate, etc., to achieve the effect of long processing cycle, saving investment and energy consumption, and low reduction pulverization rate

Active Publication Date: 2021-01-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems in the prior art that the reduction pulverization rate of vanadium-titanium-magnetite oxidized pellets is relatively high, it is easy to cause the air permeability of the shaft furnace to deteriorate, and it is difficult to meet the requirements of the gas-based shaft furnace reduction on raw materials. The purpose of the present invention is to provide a A preparation method of low-reduction powdered vanadium-titanium magnetite pellets to meet the requirements of gas-based shaft furnace reduction and realize the smooth progress of gas-based shaft furnace reduction of vanadium-titanium magnetite

Method used

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  • A kind of preparation method of low-reduction pulverized vanadium-titanium magnetite pellets
  • A kind of preparation method of low-reduction pulverized vanadium-titanium magnetite pellets
  • A kind of preparation method of low-reduction pulverized vanadium-titanium magnetite pellets

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Effect test

Embodiment 1

[0026] Prepare oxidized pellets by one-step roasting method with chain grate machine: mix vanadium-titanium magnetite concentrate, binder and water in proportion, use pelletizer to prepare green pellets with a particle size of 8-20mm; send qualified green pellets into the chain The grate machine was dried and oxidized and roasted respectively. The drying temperature was 400°C, the oxidation roasting temperature was 950°C, and the time was 60 minutes. The vanadium-titanium magnetite oxidized pellets were prepared. The reduction and pulverization properties of the oxidized pellets are shown in Table 1. Process such as figure 1 shown.

Embodiment 2

[0033] Prepare oxidized pellets by one-step roasting method with chain grate machine: mix vanadium-titanium magnetite concentrate, binder and water in proportion, use pelletizer to prepare green pellets with a particle size of 8-20mm; send qualified green pellets into the chain The grate was dried and oxidized and roasted respectively. The drying temperature was 300°C, the oxidation roasting temperature was 1050°C, and the time was 40 minutes. The vanadium-titanium magnetite oxidized pellets were prepared.

Embodiment 3

[0039] Prepare oxidized pellets by one-step roasting method with chain grate machine: mix vanadium-titanium magnetite concentrate, binder and water in proportion, use pelletizer to prepare green pellets with a particle size of 8-20mm; send qualified green pellets into the chain The grate was dried and oxidized and roasted respectively. The drying temperature was 350°C, the oxidation roasting temperature was 1150°C, and the time was 20 minutes. The vanadium-titanium magnetite oxidized pellets were prepared.

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Abstract

The invention discloses a preparing method of a low-reduction powdered vanadium titano-magnetite pellet, and belongs to the technical field of mineral processing. The method comprises the following steps of S1, vanadium titano-magnetite green ball preparing, wherein a vanadium titano-magnetite concentrate, a bonding agent, and water are evenly mixed according to the proportion for pelletizing, anda vanadium titano-magnetite green ball with the qualified granulation is obtained; and secondly, vanadium titano-magnetite oxidized pellet preparing, wherein the qualified green ball is fed into a chain grate machine to be subjected to drying and oxidizing roasting, and low-reduction powdered vanadium titano-magnetite oxidized pellet is obtained. According to the method, the chain grate machine roasting temperature range is higher than the traditional chain grate machine preheating temperature, and lower than the rotation kiln roasting segment temperature, the rotation kiln part is omitted, investment and energy consumption are saved, the produced vanadium titano-magnetite oxidized pellet is low in reduction powdering rate, the need of the raw material reduced by the subsequent gas-basedvertical furnace can be met, and the comprehensive use of vanadium titano-magnetite through the prereduction-electric furnace method process can be facilitated.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of vanadium-titanium-magnetite, and in particular relates to a preparation method of low-reduction pulverized vanadium-titanium-magnetite pellets. Background technique [0002] my country's vanadium-titanium magnetite resources are mainly distributed in the Pan-Xi region of Sichuan, Chengde of Hebei, and Hanzhong of Shaanxi. Among them, the proven reserves in the Pan-Xi area are about 9.3933 billion tons, and the predicted reserves are about 11.775 billion tons, accounting for about 1 / 5 of the total reserves of various iron ores in the country and 1 / 5 of the world's vanadium-titanium magnetite reserves. 4. Its iron, vanadium and titanium reserves account for 19.6%, 62.2% and 90.5% of the country's total respectively, and its titanium and vanadium reserves rank first and third in the world respectively. The proven reserves in Chengde area are about 8.5 billion tons, which is the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/242C22B1/02
CPCC22B1/02C22B1/2406C22B1/242
Inventor 郭宇峰陈凤王帅郑富强杨凌志邱冠周姜涛
Owner CENT SOUTH UNIV