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Iron-based mineral smelting method and smelting device

A mineral and iron-based technology, applied in the direction of reducing gas emissions, can solve the problems of low energy consumption, short process, and high iron recovery rate.

Active Publication Date: 2021-01-08
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present invention is to provide a smelting method and smelting device for iron-based minerals to solve the comprehensive effects of high iron recovery rate, high efficiency, short process, and low energy consumption in the prior art when processing iron-based ores. The problem

Method used

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  • Iron-based mineral smelting method and smelting device
  • Iron-based mineral smelting method and smelting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Using vanadium-titanium magnetite as raw material, the composition is shown in the following table (TFe represents the content of total iron in the material), unit wt%:

[0098]

[0099] use figure 1 In the jet smelting unit-electrothermal reduction unit integrated equipment shown, the jet smelting area is equipped with an upper spray gun and a lower spray gun. The height of the slag layer in the jet smelting area is recorded as H, and the distance between the nozzle of the upper spray gun and the surface of the slag layer is The distance is denoted as h 1 , the distance between the nozzle of the lower spray gun and the surface of the slag layer is recorded as h 2 , where h 1 / H is 1 / 4, h 2 / H is 3 / 4.

[0100] The massive vanadium-titanium magnetite and quicklime are put into the jet smelting area through the belt conveyor, and 15.80kg of quicklime is added per ton of vanadium-titanium ore. The material enters the jet smelting area to be melted and reduced. Arou...

Embodiment 2

[0106] Using vanadium-titanium magnetite as raw material, the composition is shown in the following table:

[0107]

[0108] use figure 1 In the jet smelting unit-electrothermal reduction unit integrated equipment shown, the height of the slag layer smelted by jet smelting in the jet smelting zone is denoted as H, and the distance from the nozzle of the upper spray gun to the surface of the slag layer is denoted as h 1 , the distance between the nozzle of the lower spray gun and the surface of the slag layer is recorded as h 2 , where h 1 / H is 1 / 4, h 2 / H is 3 / 4.

[0109] The massive vanadium-titanium magnetite is put into the jet melting pool through the belt conveyor, and the material enters the jet melting zone to be melted and reduced, and the temperature of the jet melting zone is about 1650°C.

[0110] Oxygen and natural gas are sprayed into the upper spray gun in the upper part of the jet smelting zone, and 126Nm of oxygen is injected per ton of vanadium-titaniu...

Embodiment 3

[0115] Sea sand ore is used as raw material, and the composition is shown in the following table:

[0116]

[0117] use figure 2 In the jet smelting unit-electrothermal reduction unit split-type equipment shown, the jet smelting area is equipped with an upper spray gun and a lower spray gun. The height of the slag layer in the jet smelting area is recorded as H, and the distance between the nozzle of the upper spray gun and the surface of the slag layer is The distance is denoted as h 1 , the distance between the nozzle of the lower spray gun and the surface of the slag layer is recorded as h 2 , where h 1 / H is 1 / 4, h 2 / H is 3 / 4.

[0118] The sea sand ore and quicklime are mixed according to the ratio of 1000:32. The mixed material is put into the jet melting pool through the belt conveyor, and the material enters the jet melting zone to be melted and reduced. The temperature of the jet melting pool is about 1600 °C.

[0119] Oxygen-enriched (50% oxygen-enriched con...

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Abstract

The invention provides an iron-based ore smelting method and a smelting device. It includes: directly adding iron-based minerals, the first flux and the second reducing agent into the furnace, spraying the first oxygen-enriched gas and the first fuel to the jet smelting zone with the upper spray gun, and spraying the second rich gas with the lower spray gun. Oxygen gas, the second fuel and the first reducing agent are smelted to obtain a melt containing smelting slag and metal; or, adding iron-based minerals and the first flux into the furnace, using the first spray gun to spray the first rich The oxygen gas and the first fuel are smelted to obtain the melt; the second spray gun is used to spray the second oxygen-enriched gas, the second fuel and the first reducing agent to the jet smelting initial reduction zone, and the second reducing agent is added to pass the molten material through Enter into the jet smelting primary reduction to obtain the melt containing smelting slag and metal; pass the melt into the electrothermal reduction zone for reduction and separation to obtain metal and smelting slag. The invention realizes sufficient recovery of iron in iron-based ore, and efficiently separates iron, vanadium and titanium.

Description

technical field [0001] The invention relates to the technical field of iron ore smelting, in particular to an iron-based mineral smelting method and a smelting device. Background technique [0002] Vanadium and titanium are important strategic metals, widely used in aerospace, navigation, battery, medical and other fields. Many iron-based minerals, such as vanadium-titanium magnetite, sea sand ore, ilmenite, etc., also have relatively high content of vanadium and titanium. These iron-based minerals are important sources of vanadium and titanium resources in the future. Utilization will be the direction of industrial development. [0003] The treatment of iron-based minerals such as vanadium-titanium magnetite and sea placer in my country is mainly based on the blast furnace process, but this process can only recover iron and vanadium, and the blast furnace process requires A large amount of iron concentrate is added to make the TiO in the slag 2 Low content cannot be recyc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B11/00C21B11/10C22B34/22C22B34/12C22B5/10
CPCC21B11/00C21B11/10C22B34/22C22B34/1227C22B5/10Y02P10/143
Inventor 李东波黎敏徐小锋曹珂菲郭亚光高永亮王云陆志方刘诚魏甲明陈宋璇陈学刚苟海鹏冯双杰崔大韡余跃尉克俭陆金忠茹洪顺李兵张海鑫
Owner CHINA ENFI ENGINEERING CORPORATION
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