Vanadium-containing pig iron and method for preparing vanadium-containing pig iron by smelting vanadium-containing steel slag

A steel slag and pig iron technology, which is applied in the field of vanadium-containing pig iron and smelting vanadium-containing steel slag to produce vanadium-containing pig iron, can solve the problems of large-scale application limitations, high cost of vanadium extraction, low recovery rate, etc., and achieve reuse and adaptability of raw materials Strong, high recovery effect

Inactive Publication Date: 2020-07-10
BERIS ENG & RES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional wet method for vanadium extraction has high cost, high pollution, poor selectivity, low recovery rate, and large-scale application is limited. Therefore, an economical and efficient vanadium extraction method is urgently needed in this field.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] After ball milling 64 parts of vanadium-containing steel slag, 32.01 parts of vanadium powder ore and other vanadium-containing materials, 1.60 parts of coke powder, 2.40 parts of dust removal ash, and appropriate amount of bentonite are added. After mixing and pelletizing, they are sent to sintering to obtain qualified Sinter. Then weigh 70 parts of sintered ore, 30 parts of vanadium-titanium magnetite lump ore, 25.26 parts of coke, and 6.96 parts of silica, and transfer them to a closed submerged arc furnace top transition bunker by a belt conveyor, and then drop to the rotating distributor to add to the furnace top bunker , Continuously add into the furnace through the material tube. The smelting temperature is controlled at 1650~1700℃, and the furnace mouth is opened every 2.5 hours to mix slag and iron. The obtained pig iron composition includes Fe 82.75%, C 7.48%, Si 4.98%, and V1.17%. The submerged arc furnace gas is recovered and used as the ignition heat sourc...

Embodiment 2

[0054] After ball milling 58.40 parts of vanadium-containing steel slag, 36.49 parts of vanadium powder ore and other vanadium-containing materials, mix with 2.19 parts of coke powder, 2.92 parts of dust removal ash, and add appropriate amount of bentonite. After mixing and pelletizing, it is sent to sintering to obtain qualified Sinter. Then weighed 75 parts of sintered ore, 25 parts of vanadium-titanium magnetite lump ore, 25.20 parts of coke, and 7.27 parts of silica, transferred by the belt conveyor to the transition silo on the top of the closed submerged arc furnace, and then dropped to the rotating distributor and added to the silo on the top of the furnace , Continuously add into the furnace through the material tube. The smelting temperature is controlled at 1650~1700℃, and the furnace mouth is opened every 2.5 hours to mix slag and iron. The obtained pig iron composition includes Fe 82.76%, C 7.49%, Si 4.99%, and V 1.16%. The submerged arc furnace gas is recovered a...

Embodiment 3

[0056] After ball milling 64.34 parts of vanadium-containing steel slag, 31 parts of vanadium powder ore and other vanadium-containing materials, mix with 1.56 parts of coke powder, 3.10 parts of dust removal ash, and add appropriate amount of cellulose. After mixing and pelletizing, it is sent to sintering, and it is qualified. Of sinter. Subsequently, 87.68 parts of sintered ore, 12.32 parts of vanadium-titanium magnetite lump ore, 22.24 parts of coke, and 7.95 parts of silica were weighed and transferred by the belt conveyor to the top transition bin of the closed submerged arc furnace, and then dropped to the rotating distributor and added to the top bin of the furnace , Continuously add into the furnace through the material tube. The smelting temperature is controlled at 1650~1700℃, and the furnace mouth is opened every 3 hours to mix slag and iron. The obtained pig iron composition includes Fe 81.96%, C 7.46%, Si 4.98%, and V 1.47%. The submerged arc furnace gas is reco...

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Abstract

The invention belongs to the technical field of metal smelting, and particularly relates to vanadium-containing pig iron and a method for preparing the vanadium-containing pig iron by smelting vanadium-containing steel slag. The method for preparing the vanadium-containing pig iron by smelting the vanadium-containing steel slag comprises the following steps that (1) granulating and sintering are conducted on the vanadium-containing steel slag, vanadium ore fines, coke powder and fly ash to obtain sintered ore; (2) after the sintered ore, vanadium-titanium magnet lump ore, coke and silica are prepared into furnace burden, the furnace burden is added into a furnace for smelting; and (3) deslagging and tapping are conducted. The method for preparing the vanadium-containing pig iron by smelting the vanadium-containing steel slag has the advantages of being short in process, high in raw material adaptability and capable of effectively recycling vanadium resources in the steel slag.

Description

Technical field [0001] The invention belongs to the technical field of metal smelting, and specifically relates to a method for preparing vanadium-containing pig iron by smelting vanadium-containing steel slag. Background technique [0002] Vanadium can refine the structure and grains of steel, improve its hardness and wear resistance, and is used in special steel, low-alloy steel, and micro-alloy steel. In nature, vanadium tends to form symbiotic ore or composite ore with other elements. Among them, vanadium-titanium magnetite and some iron ore have the most vanadium reserves, and the main vanadium-producing countries are extracted from this type of mineral. [0003] At present, the domestic use of vanadium-titanium magnetite to extract vanadium mainly adopts the following processes: firstly, it is sent to a blast furnace for smelting, the vanadium is reduced to molten iron, and then the vanadium is oxidized into the slag through equipment such as a converter or a shaker to obtain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22B34/22C22B5/10C22B7/04C22B1/16C21B13/00
CPCC21B13/0006C21B13/0066C22B1/16C22B5/10C22B7/04C22B34/22C22C37/10Y02P10/20
Inventor 吕韬李秦灿于洪翔宁晓宇陈圣鹏陈文国蔡文
Owner BERIS ENG & RES CORP
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