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Vanadium-titanium magnetite ore coal-based reduction process

A technology of vanadium-titanium magnetite and vanadium-titanium magnetite concentrate, which is applied in the field of vanadium-titanium magnetite coal-based reduction process, can solve the problems of high smelting cost and low metal recovery rate, achieve significant economic benefits and increase the reduction rate , the effect of reducing production costs

Inactive Publication Date: 2020-10-09
JIUQUAN IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The invention provides a coal-based reduction process of vanadium-titanium-magnetite, which aims to solve the problems of high smelting cost and low metal recovery rate of vanadium-titanium-magnetite resources at present

Method used

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  • Vanadium-titanium magnetite ore coal-based reduction process

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Effect test

Embodiment 1

[0058] A kind of vanadium-titanium magnetite coal-based reduction process comprises the following steps:

[0059] Selection of raw materials for S1: the raw materials are iron grade 48-55%, SiO 2 Vanadium-titanium magnetite concentrate with a content of 3-5% and a particle size below 200 mesh accounts for more than 80%; fuel and reducing agent use high-volatile coal, preferably 45-50% volatile matter, 43-48% fixed carbon content, and a particle size of less than 10mm lignite;

[0060] S2 raw material processing: add the vanadium-titanium magnetite concentrate in step S1 to the concentrate dryer for drying, add high-volatile coal to the coal dryer for drying, and remove the moisture in the material; then dry the highly volatile More than 80% of the coal is ground to below 200 mesh;

[0061]Preparation of S3 pellets: According to parts by weight, select 100 parts of vanadium-titanium magnetite concentrate, 38 parts of high-volatile coal, 2 parts of binder, and 1 part of focusi...

Embodiment 2

[0069] A kind of vanadium-titanium magnetite coal-based reduction process comprises the following steps:

[0070] Selection of raw materials for S1: the raw materials are iron grade 48-55%, SiO 2 Vanadium-titanium magnetite concentrate with a content of 3-5% and a particle size below 200 mesh accounts for more than 80%; fuel and reducing agent use high-volatile coal, preferably 45-50% volatile matter, 43-48% fixed carbon content, and a particle size of less than 10mm lignite;

[0071] S2 raw material processing: add the vanadium-titanium magnetite concentrate in step S1 to the concentrate dryer for drying, add high-volatile coal to the coal dryer for drying, and remove the moisture in the material; then dry the highly volatile More than 80% of the coal is ground to below 200 mesh;

[0072] Preparation of S3 pellets: According to parts by weight, select 100 parts of vanadium-titanium magnetite concentrate, 40 parts of high-volatile coal, 1 part of binder, and 2 parts of focus...

Embodiment 3

[0080] A kind of vanadium-titanium magnetite coal-based reduction process comprises the following steps:

[0081] Selection of raw materials for S1: the raw materials are iron grade 48-55%, SiO 2 Vanadium-titanium magnetite concentrate with a content of 3-5% and a particle size below 200 mesh accounts for more than 80%; fuel and reducing agent use high-volatile coal, preferably 45-50% volatile matter, 43-48% fixed carbon content, and a particle size of less than 10mm lignite;

[0082] S2 raw material processing: add the vanadium-titanium magnetite concentrate in step S1 to the concentrate dryer for drying, add high-volatile coal to the coal dryer for drying, and remove the moisture in the material; then dry the highly volatile More than 80% of the coal is ground to below 200 mesh;

[0083] Preparation of S3 pellets: According to parts by weight, select 100 parts of vanadium-titanium magnetite concentrate, 39 parts of high-volatile coal, 3 parts of binder, and 2 parts of focu...

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Abstract

The invention discloses a vanadium-titanium magnetite ore coal-based reduction process. The adopted production process includes the steps that vanadium-titanium magnetite concentrate, high- volatile coal, a binder and a focusing agent are subjected to batching, blending and pelletizing according to the ratio being 100:(38-40):(1-3):(1-2); in the process of conducting heating and temperature rise on dried pellets in a rotary hearth furnace, reduction is conducted on vanadium-titanium magnetite ore through H2 generated by coal sufficient pyrolysis and H2 generated by carbon gasification reactionwith H2O as a gasification agent, the fire box temperature is controlled at 1250 DEG C to 1300 DEG C, the calcination time is 50-55 min, the vanadium-titanium magnetite ore can be sufficiently reduced, and after reduction materials are subjected to dry grinding dry separation and electric furnace smelting separation, semi-steel, vanadium-titanium-rich tailings and vanadium-titanium-rich slag canbe obtained. The vanadium-titanium magnetite ore coal-based reduction process has the advantages that vanadium-titanium magnetite ore reduction is sufficient, the product metallization ratio is high,the production energy consumption is low, the single-furnace production capacity is high and essence emission reduction is achieved; and after the vanadium-titanium-rich tailings and the vanadium-titanium-rich slag are subjected to acid leaching, iron, vanadium, titanium and other valuable elements in the vanadium-titanium magnetite ore can be recycled.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and mineral engineering, and in particular relates to a coal-based reduction process of vanadium-titanium magnetite. Background technique [0002] Vanadium-titanium magnetite is a composite mineral containing vanadium, titanium, iron and other valuable elements such as scandium, chromium, cobalt, copper, nickel and other symbiotic elements. Among them, vanadium has excellent physical and chemical properties and is widely used in aerospace, machinery manufacturing, chemical batteries and bridges and other fields, so it is called "the monosodium glutamate of modern industry". Due to its stable chemical properties, high temperature resistance, corrosion resistance and high strength, titanium is called "space metal" and is widely used in aerospace, medicine, military and other fields. Therefore, efficient utilization of vanadium-titanium magnetite resources and comprehensive recovery of valuable e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243C22B1/02C21B13/10C21C5/52C21C5/54C22B5/10C22B7/04C22B34/12C22B34/22
CPCC21B13/105C21C5/52C21C5/527C21C5/54C22B1/02C22B1/2406C22B1/243C22B5/10C22B7/007C22B7/04C22B34/124C22B34/22Y02P10/20
Inventor 权芳民何成善丁凯白云
Owner JIUQUAN IRON & STEEL GRP
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