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Method for smelting vanadium and titanium ore and smelting system

A technology of vanadium-titanium ore and vanadium-titanium sintered ore, which is applied in the field of smelting vanadium-titanium ore, can solve the problems of high cost of ordinary iron ore, increased production cost, high cost of ingredients, etc., to extend the industrial chain of vanadium and titanium extraction, reduce Ingredients cost, effect of increasing vanadium and titanium content

Active Publication Date: 2014-08-13
SICHUAN DAZHOU IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the large blast furnace for modern smelting ordinary mines, according to the principle of realizing "concentrated materials" into the furnace, no slag outlet device is designed, and the furnace materials composed of ore materials, additives and reducing agents are evenly mixed and fed into the blast furnace in batches from the furnace top feeding port. At the same time, the preheated air is blown into the blast furnace from the air inlet at the bottom of the bosh, and the furnace material is chemically reduced in the blast furnace to obtain iron. However, the current demand for ordinary iron ore is very large, and the supply is tight, resulting in a high cost of ordinary iron ore. In this way, the production cost of the enterprise will also increase to a large extent, and the price of vanadium-titanium magnetite ore powder is relatively lower than other iron concentrates, such as domestic ordinary iron concentrates and imported ore powders, especially compared with imported ore Compared with powder, the price is much lower
The proportion of vanadium-titanium ore in the existing iron-making furnace charge is about 50%, but ordinary iron ore still occupies a large part in the furnace charge, and the cost of ingredients is relatively high

Method used

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  • Method for smelting vanadium and titanium ore and smelting system
  • Method for smelting vanadium and titanium ore and smelting system
  • Method for smelting vanadium and titanium ore and smelting system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Measure and weigh according to the proportion of formula 1 in Table 1, add a certain amount of sintering modifier in proportion according to the weight of the added mineral material and stir evenly with the stirring equipment, then add the furnace material into the slag-free blast furnace. The composition (% by weight) of the vanadium-titanium sinter modifier is: calcium chloride 80-90%, ferric chloride 10-20%, and the hot blast stove adopts double preheating technology, so that the air volume in the blast furnace is 3800 m3 / At the same time, the air temperature in the blast furnace is kept at 1200°C, which makes the mixture react faster and is beneficial to the smelting operation. The iron-storage type ditch is used to connect the taphole, so that the big ditch can work continuously, and two tapholes are adopted Rotation operation ensures timely discharge of high-titanium slag and iron, which is conducive to the relative movement of furnace charge and gas to ensure smo...

Embodiment 2

[0059] Measure and weigh according to the proportion of formula 2 in table 1, add a certain amount of sintering modifier in proportion according to the weight of the added ore charge and stir evenly through the stirring equipment, then add the charge into the blast furnace without slag, so that the charge is in the blast furnace. The air volume in the slag-free blast furnace is stabilized at 3800 m3 / min, and the air temperature in the blast furnace is kept at 1250°C. Under such conditions, the reaction of the mixture is more sufficient, and the reduction rate of Fe is above 98%, so that the iron in the mixture is fully is restored.

[0060]In addition, the large iron storage ditch is used to connect the taphole, so that the big ditch can operate continuously, and the two tapholes are rotated to ensure the timely discharge of high-titanium slag and iron, which is conducive to the relative movement of the charge and gas, and ensures the smelting process. It is smooth, and a skim...

Embodiment 3

[0062] Measure and weigh according to the proportion of formula 3 in Table 1, add a certain amount of sintering modifier in proportion according to the weight of the added ore charge and stir evenly through the stirring equipment, then add the charge into the blast furnace without slag, so that the charge is in the blast furnace. The air volume in the slag-free blast furnace is stabilized at 3800 m3 / min and the air temperature in the blast furnace is kept at 1350°C. When the reaction temperature of the mixture reaches the range of 1350°C, the melting temperature of metallic iron carburizing and primary slag drops, and slag and iron begin to melt dripping. Vanadium-titanium ore smelting is characterized by the reaction in the drop zone that the oxides of titanium and vanadium are reduced by carbon. According to the change of reaction free energy, the main reaction that may occur is the slag-coke interface reaction:

[0063] 2TiO2+C→Ti2O3+CO↑

[0064] TiO2+C→TiO+CO↑

[0065] ...

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Abstract

The invention discloses a method for smelting vanadium and titanium ore, comprising: obtaining furnace charge, wherein the furnace charge comprises mineral aggregate, additive and reducing agent, the mineral aggregate comprises 75-80 percent of vanadium and titanium sintered ore, 15-22 percent of vanadium and titanium ore pelletizing and 3-5 percent of iron briquette in weight percentage, then carrying out chemical reaction to the furnace charge to obtain a product of zero-valent iron, and finally, separating the product of zero-valent iron to obtain zero-valent iron and slag. The method for smelting vanadium and titanium ore and the smelting system provided by the invention have the advantages of increasing the ratio of vanadium and titanium ore in furnace charge and decreasing the ratio of common iron ore, in the way, the burdening cost is reduced.

Description

technical field [0001] The invention relates to the field of metallurgical methods and metallurgical equipment, in particular to a method for smelting vanadium-titanium ore. Background technique [0002] With the continuous development of blast furnace ironmaking high blast temperature technology, blast furnace blast hot blast temperature has reached above 1300°C. The physical heat brought in by the blast has a certain margin in the theoretical combustion degree formed in the tuyere area of ​​the blast furnace. Most blast furnace operations reduce the theoretical combustion temperature by humidifying the blast or increasing the amount of coal injection, so that the theoretical temperature can be maintained within a certain area. The increase of blast furnace blast temperature will consume low-value blast furnace gas, which can reduce the consumption of high-value coke in the blast furnace. [0003] In the large blast furnace for modern smelting ordinary mines, according to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
Inventor 王皎月李元廷刘顺明邓孝天汪洋廖存富
Owner SICHUAN DAZHOU IRON & STEEL GROUP