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Blast-furnace smelting method for vanadium-titanium magnetite

A vanadium-titanium magnetite, blast furnace smelting technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve the problems of high iron content and high iron loss, and achieve the effects of reducing slag viscosity, iron content, and loss

Inactive Publication Date: 2013-10-23
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an improved blast furnace smelting of vanadium-titanium-magnetite in order to overcome the defect that the iron content in the slag is relatively high in the existing vanadium-titanium-magnetite blast furnace smelting method, thereby causing a high loss of iron method

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  • Blast-furnace smelting method for vanadium-titanium magnetite

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preparation example Construction

[0019] The preparation method of the vanadium-titanium sintered ore can be carried out according to the conventional preparation method in the art, for example, the preparation method of the vanadium-titanium sintered ore can include: combining vanadium-titanium iron concentrate and common iron concentrate with fuel (charcoal, coke powder) mixed with flux (quicklime and / or limestone) and sintered. Wherein, the dosage of vanadium-titanium iron concentrate and ordinary iron concentrate can be the conventional dosage of vanadium-titanium-iron concentrate in the preparation of sintered ore in this field. 50-55% by weight of the total weight, and the amount of ordinary iron concentrate is 25-30% by weight of the total weight of raw materials used to form vanadium-titanium sintered ore. The commonly used sintering method is sintering on a belt sintering machine, for example, adding mixed iron concentrate (that is, a mixture of vanadium-titanium iron concentrate and ordinary iron con...

preparation example 1

[0038] Preparation Example 1: Preparation of Vanadium-Titanium Sintered Ore

[0039] The vanadium-titanium iron ore concentrate of 52 parts by weight, the common iron ore concentrate of 28 parts by weight, the coke powder of 52 parts by weight and the unslaked lime of 15 parts by weight carry out cloth on the magnetic roller distributor and add on the trolley, then in 1350 Sintering in a sintering machine at ℃ for 30 minutes, the sintering machine speed is 1.71m / min, the vertical sintering speed is 21.60mm / min, and the drum strength is 72.51%, then the vanadium-titanium sintered ore is obtained. It is 22.85mm.

[0040] Described drum strength is the ISO drum strength defined according to GB13242, refers to get 7.5 kilograms of sintered ore of 40-10mm in ISO drum machine (SQZG--4 type; Hebi City Metallurgical Machinery Equipment Co., Ltd.) after rotating 200 revolutions, The percentage of >6.3mm particle size sinter in the weight of the whole sinter is an important index to me...

preparation example 2

[0041] Preparation Example 2: Preparation of Vanadium-Titanium Pellets

[0042] Put 92 parts by weight of vanadium-titanium iron ore concentrate, 8 parts by weight of common iron ore concentrate and 2.2 parts by weight of bentonite into a large electric mixer (HXDH-15L; Shangyu Hongxing Machinery Manufacturing Co., Ltd.) Mix evenly, put into large-scale ball mill (ASM type horizontal ball mill; Wuxi City Haibo Drying Machinery Equipment Factory) internal moistening after mixing, utilize disc pelletizer (Tangshan Tangye Reducer Manufacturing Co., Ltd.) to pelletize, Air-dried on a chain grate machine (Jiaozuo Zhengyuan Machinery Manufacturing Co., Ltd.), with a wind speed of 1.5m / s, an initial drying temperature of 50°C, a preheating temperature of 600°C, and roasting in a rotary kiln at a roasting temperature of 1200°C , Roasted for 30 minutes to obtain vanadium-titanium pellets. The compressive strength of the vanadium-titanium pellets is 3310N / piece.

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Abstract

The invention provides a blast-furnace smelting method for vanadium-titanium magnetite. The method comprises the following steps of: in the existence of coke, adding the vanadium-titanium magnetite raw material into a blast furnace, smelting, and blowing fuel and introducing oxygen-containing gas into the blast furnace through a blast-furnace tuyere, wherein the method also comprises the following step of: blowing oxidized powder into the blast furnace through the blast-furnace tuyere. By adopting the blast-furnace smelting method for the vanadium-titanium magnetite, the iron content of iron slag can be reduced obviously.

Description

technical field [0001] The invention relates to a blast furnace smelting method of vanadium-titanium magnetite. Background technique [0002] At present, the blast furnace smelting method of vanadium-titanium magnetite usually mainly includes: sintering vanadium-titanium iron concentrate and ordinary powder ore to produce sintered ore, and using vanadium-titanium-iron concentrate and ordinary iron concentrate to produce pellets, Then put sinter, pellets and a small amount of lump ore into the blast furnace together with coke in a certain proportion, and at the same time, pulverized coal is injected through the tuyere of the blast furnace and air is blown in to burn the coke and the pulverized coal injected to form Reducing gases (mainly CO and H 2 ), the reducing gas removes the oxygen in the vanadium-titanium magnetite during the process of rising in the furnace, reduces to obtain iron, and then melts and drops to the hearth to realize the separation of slag and iron, thus...

Claims

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Application Information

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IPC IPC(8): C21B5/00
Inventor 付卫国谢洪恩文永才曾华峰邹世华
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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